Fabrics for sieves made of silk and synthetic threads. Fabrics for sieves made from silk and synthetic threads Fabric made from natural silk threads 4403 91

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GOST 4403-91

INTERSTATE STANDARD

GENERAL SPECIFICATIONS

Izlanne official

NICK PUBLISHING STANDARDS

UDC 677.494.077: 006.354 M98 group

INTERSTATE STANDARD

FABRICS FOR SIEVE FROM SILK AND SYNTHETIC THREADS

General specifications 4403-91

Fabrics of silk and svathetec threads for sieves. General specifications

OKP 53 7516.53 7556

Date of introduction 01.01.93

This standard applies to sieve fabrics. made from silk and synthetic threads.

The requirements of this standard are mandatory. except for clause 3.2. which is recommended.

1. TECHNICAL REQUIREMENTS

1.1. Fabrics for sieves should be manufactured in accordance with the requirements of this standard for technological regimes. according to established order.

Synthetic threads. used in the manufacture of fabrics. used in the food industry. must be approved for use by the state sanitary authorities.

1.2. Main parameters and dimensions

Fabric for sieve canvas. made in the weaving process by interlacing one or more systems of warp (longitudinal) and weft (transverse) threads with the formation of a regular structure.

1.2.2. Fabrics should be produced from natural silk threads according to GOST 561 $ and synthetic ((kapron, polyester and polyamyl monofilaments) according to regulatory and technical documentation.

1.2.3. Fabrics should be produced by weaving: linen (Fig. 1). twill (Fig. 2). openwork (Fig. 3), semi-false openwork (Fig. 4) and combined (Fig. 5).

Lute weave Twill weave

Official edition Reprint of the prohibition

S. 2 GOST 4403-91

Openwork weave Semi-false openwork weave

Gle / spacing between warp threads at the base of the hole. µm: the largest distance between the two warp threads in the hole. µm: + distance between weft threads. µm. A group of threads. tightly adjacent to each other and leaving no free space.

counts as one thread.

).2.4. Lodge fabrics are produced in pieces. m. at least: from synthetic threads: from natural silk.

1.2.5. After weaving, natural silk fabrics are washed and prepped. and fabrics made of synthetic threads undergo heat setting in a harsh or boiled fork.

1.2.6. Fabrics must also be tinted with a width of 97 to 165 cm. The nominal width of the fabric is set by agreement between the manufacturer and the burial place.

1.3. Characteristic

1.3.1. Fabrics according to physical and melanic parameters. vices of the external villa. The division into groups must comply with the requirements specified in Re 2.

GOST 4403-91C. 3

Gablin 1

Ali norms

Applicant name wa wary PO Heth made of synthetic threads

Grunia A Gruina 5

Deviation from nominal shi-

rins. “#. no more than 2.0 3.0 2. 3.0

superficial density of exhaust gases minimum

but acceptable. He Gore IS. - 109.0 Deviation in terms of the number of

verety on Rem. “#. no more than 6.0 154 Ci 154 Relative deviation of average

its size of the hole from the nominal

leg. ®, not more than 15.0 25.0 124 20.0)

Maximum deviation

ra separate holes from the nominal. “#. no more - - 3..0* 20.0%

* Pokantel is set for fabrics with the symbol PA and ICH. used in flour milling

noah industry.

Note. The symbol for fabrics is given in Appendix D.

Tableia 2

Razzyvann impudently ska 1kani lazylam 9. UM mm. zaN_ not less Surface area fork fabric

pa exact komaikiro

SHOOT Og STAC noe das daspicag

Natu fabrics

ral silk 3s-47 NM 45-61 -

Synthetic fabrics 3? - tic threads 3-4 - 45-61 -

1.3.2. The elongation at break of a strip of fabric measuring 50 x 200 mm must be. in propents. no more:

26 for natural silk fabrics:

35 for fabrics of isesynthetic threads of group A:

4A for fabrics made of polyester threads, group B pomamid threads and fabrics of the symbol "PA" with more than 58 holes per [| cm.

1.3.3. Elongation of a strip of fabric measuring 50 x 200 mm along the base at 19 @-th load from the standard one. in percentages. no more:

10.0 for IF fabrics:

9.0 for fabrics of different density and fabrics with a number of holes not more than 58 per ) cm.

Note. The indicator "strip elongation at 19" =-th load from the standard" comes into effect from 01/01/98 and is set for fabrics used in the flour-grinding industry.

S. 3 GOST 4403-91

4. Determination of grade „4.1. The number of defects of the external vila on | m? should not exceed that specified in the table. 3.

tablina 3

the number of vices of the visshiet species. whether fabric Grulia fabric

AS natural silk and synthetic threads

G. tab. 4.

4.2. Name and size of defects appearance. dispersed in tissues. listed in

GTablia 4

Nzimsizvani: vice

The size of the damage is tanen

Pancakes. eat. no more than 3 Polyletins. see no more! Diving. see no whiter than Mu Nenjeki and see no more than 4 Threads thinned more than 3 times the thickness of the thread. eat.

no more than 3 strands of braided threads. see no more than 5 Spots. cm", no more white 3 Notched with a berl no more than half-mountain hole size.

m. no whiter: for fabric of group A 1 for fabric of group B 20 Roughness of the base. eat. non-bales: bark fabrics of group A x li fabrics of group B 15

Note. Mink fabrics and their definition - according to GOST 2550. TOST 27244 and Appendix 2.

1.3.4.3. The following defects are not allowed in fabrics:

earning extraneous prelmetov;

vices. exceeding the sizes specified in tab. 4.

1.3.4.43. Tissue defects. listed in clause 1.3.4.3 are subject to exclusion by the manufacturer. or the location of the defect at the edge is marked with severe threads or a stamp "B" (conditional cut).

The number of cuts or conditional cuts per conditional length of 40 m should not be more than three.

1.3.4.5. Raw defects: mustaches, rallies. unstretched sections of thread. sagging (for synthetic fabrics), stripes. body stripes are not considered a vice.

1.3.9. Indicators. Characteristics of specific properties of each article of fabric (minimum surface density, hole sizes, open section coefficient, name and linear density of threads are provided in appendices 3 and 4.

For fabrics of a new range, these indicators should be provided for in the technical documentation.

1.43. Marking

1.4.1. Both ends of a piece of fabric must be stamped with the name of the manufacturer and the number of the technical inspector.

The stamp should be located with the long side along the cut of the fabric at a distance of no more than 100 mm from the edge of the cut and the edge of the fabric.

1.4.2. A label is attached to each piece of fabric indicating:

name of the enterprise and the manufacturer: its trademark:

fabric name and article number:

GOST 4403-91C. 5

numbers and lengths of the piece: the number of conditional cuts: fabric groups: the lengths of the fabric in the piece. m: armor release: designations of this standard. 1.4.3. Available on paper or film. in which a piece of fabric is wrapped. tag. or put stamps indicating the details according to clause 1.4.2. 1.4.4. Transport marking - in accordance with GOST 7000 with the application of manipulation signs in accordance with GOST 14192 "Protect from moisture and" Do not take with hooks. . Packing J). The fabric in the piece must be rolled into a roll or folded into meter-long folds. 1.5.2. Each piece of fabric should be folded to the left along the width of the fabric and packed with all

CTOPOIL Bb paper. cellophane or polyurethane film and tied in two places with a braid (Fig. 6).

1.3.3. when packing fabric. folded to full width. the torps of the piece are left open -

MI. Pieces of fabric with open ends must be fully tied along the length of the piece.

1.5.4. Packing of fabrics for transportation in accordance with GOST 7000. 2. ACCEPTANCE

2.1). Acceptance according to GOST 20566. 2.2. The frequency of non-testing of the fabric in terms of physical and mechanical and physical and chemical indicators

the manufacturer is set by the manufacturer. 3. TEST METHODS

3.1. Sample selection. according to GOST 20566.

3.2. Checking the quality of fabrics in terms of appearance will be done by viewing them under reflected light on a grading table or machine.

3.3. Determination of linear dimensions and surface density according to GOST 31.

3.43. Definition of skew no FOCT 14067.

S. 6 GOST 4403-91

3.5. Determination of the breaking load and the breakage at break and the shedding at 19-th load from the standard according to GOST 3 $ with the following additions: when using the breaking machine of the "Inetron" type (moll 1026), the speed of the upper clamp is taken to be 100 mm / min: tests will be carried out on this machine without pretensioning load.

For the final elongation result at 10 “-th load from the standard load, the worst indicator from the average arithmetic measurements on the warp or on the weft is taken.

3.6. Determination of the linear size of the hole

3.6.1. To determine the linear size of the hole, elementary samples are used. prepared for the definition of discontinuous characteristics.

3.6.2. Anparatura Alya measurements of hole parameters use a micromacroproscope.

When noting. It is allowed to measure the parameters of the holes in a microscope with an eyepiece micrometer with a baseline of 0.01 and mm (depending on the size of the hole in the lhanilla sigri with magnification and fermentation of at least 0x ala of tissues with the amount of rejection of lo 16 at the same time and at least HF barking of the rest of the tissue.

3.6.3. Testing test

Hole size is determined by measuring three hole parameters (see drawing 3): 1: Li/.

The sieve openings are measured in groups. located along the length of the elementary sample in different places. Places of measurement are chosen in such a way. so that the warp or weft threads of the full measurement point are not a continuation of the warp or weft threads of the elastic one.

On each elementary sample, 6 V of successive holes are measured. The total number of holes to be measured should be 5).

For the final result of measuring the parameters /; ri / take the arithmetic mean of all measurements for each parameter.

3.6.4. Results processing

The arithmetic mean of two or three parameters is taken as the linear size of the hole. Boric. leniya Conduct

GOST 4403-91C.7

The number of holes and Gem tissue n, calculated by the formula

i = OR a =

KIC A, WA, holes on heme in warp or weft: k.ik number of warp and weft holes in the area to be measured: Di length of the area to be measured. mm. on which are located to, and to, a row of lying holes with threads between them. 3.7.4. Processing of results The final measurement result is taken as the average of none of the warp or weft measurements. The calculation is carried out with an accuracy of 0.1 and rounded up to an integer. 34. Determination of the coefficient of the living section of the tissue 3.\.1. The coefficient of the open section of the fabric (A) (lolya was wrong with the opening of the fabric) as a percentage is calculated by the formula

where n is the number of holes per rem: fabric. defined as the product of the number of holes in the backbone by the number of holes in the weft;

t 5. The area of ​​the full hole. um? calculated by formulas Ss. = 1

5, = 0.57 (1, +1) ala whitefish fabrics made of silk threads.

The fabric area equal to | cm?.

Calculations are carried out as a percentage with an accuracy of:

(0.01 for fabrics made of synthetic threads:

0.1. for natural silk fabrics.

and rounding is done lo:

0. for fabrics made of synthetic threads:

1.0 for silk fabrics.

3.9. Determination of abrasion resistance

3.9.1. Sample selection

From a spot test. selected according to GOST 20566. 4 elementary samples are cut off with a size NO = PO cm.

3.9.2. Equipment

To carry out the test, the IT-3 device is used with a corunnel abrasive made of EB 180 SM 2 kamium.

3.9.3. Test preparation

Before starting work, the correctness of the readings of the device is checked by testing the embossed fabric.

Unprepared linen fabric art. 72110 abrasion resistance (300 + M)) nickel. at a pressure of 200 g and a tension of 2 tf.

Passed by testing the control tissue. and before testing each new elemental sample, the abrasive discs must be cleaned of textile dust with a toothbrush or polish No. 1180 20).

3.9.4. Conducting a test

The resistance of the fabric to abrasion is determined on an IT-3 type device. An elementary sample with a size of 110 x 10 mm is fixed on an annular spot. The hoops are mounted on a cone

S. 8 GOST 4403-91

appliance and carefully raise the area where it comes into contact with the abrasive pads. in this case, the rod with the ball will exert a uniform tension on the fabric.

The amount of deflection of the fabric in millimeters under tension should be approximately OLINA-KOBOH for each fabric article and is controlled on the scale of the device. The fabric tension should be 100 gf.

The abrasion of the elementary sample occurs on the kohl-shaped surface of the hoop with two corundum abrasives. Then, a hold is created between the crushing surfaces of the donkeys (an elementary test and a buttstone) with the help of a lever and a load of 100 gf.

The abrasion of the elementary sample being tested is carried out for holes (lo exposure of any surface of the hoop). At the same time, the device automatically turns off, and the counter records the number of pickle-turns of the runner with abrasive disks.

3.9.5. (Zhrabotka re

For the indicator "fabric resistance to abrasion" take the arithmetic average of the results of four tests. counted with the precision of a lo iele number.

4. TRANSPORT AND STORAGE

4.!. Transportation and storage - according to GOST 7009 with the following changes:

it is allowed, in agreement with the consumer, to transport fabrics in containers or covered vehicles without packaging,

containers and machines should be lined with paper or cardboard inside.

4.2. Fabrics for sig are stored in warehouses on pallets or racks, protected from direct contact. sun rays. and at a distance of at least ) m og heaters.

GOST 4403-91C. nine

CONVENTIONAL DESIGNATION OF FABRICS FOR SIEVE

The article of fabric for sig is designated ALY SB:

gle |] - the number of holes on [it on the warp or weft in the production of fabrics with olinaco density on the warp and weft: or the number of holes per 19 cm for weighted natural silk fabrics: and! - I. + I, - when making fabrics on the warp and weft: ge P, - the number of holes in it on the warp: And, - the number of holes in [cm on ugk:

Y - conventional letter designation of fabric, depending on the raw materials and technology used;

B - the nominal width of the fabric, eat.

In the production of ala sieve fabrics, the following conventions are used:

N - than from natural silk. developed by new technology:

K - tulle from kapron threads:

PA - fabric made of polyamyl threads:

KCh - fabric from kapron threads of the Chernihiv POKhV;

FC - fabric from kion threads of Chernihiv POKhV according to imported technology of weaving:

PE - polyether yarn fabric:

C - the fabric is worked out on STB looms.

Notes:

1. The absence of a quen in the article Oy denotes. that the fabric is made from natural silk. 2. In the article of the pifra fabric. affixed after the rolled designation of the fabric. means the diameter of the line (in µm). used to make fabric.

3. Loaded fabrics are sieve fabrics made from natural balysh silk.

linear density at a constant number of holes.

An example of a fabric symbol:

Thanh la sit. made from natural silk threads. with hole number 25 in thread width 97:

fabric art. 29747;

Thanh la sit. produced from kapron nigea of ​​Chernihiv POHV. with hole number 19 in Tem and width H/2:

fabric art. (FAQ: I).

P. 10 GOST 4403-91

APPENDIX 2

Reference

The terms of vices and their definition

Table 5

The Vices of Definitely

Earnings of a foreign item Foreign object. spun in fabric (yarn. fluff.

metal. dersvo it. n.) Pull-ups of separate threads A local defect of lacing in the fork of a woven warp or yoke thread that differs from neighboring threads in sheen

Pacupoc banding is a transverse tissue defect. characterize \ kineisya by the presence of sections of threads. differing in mucus Warp splay Local defect of the fabric in the field of unraveling of the warp threads from their non-parallel development in the fabric

Dark stripes Chalky defect in the form of dark feathers on the base or VIKN

Mustache Konpa threads on panernosli fabric

GOST 4403-91C. And

APPENDIX

Reference

Sieve nz natural silk fabrics Table 6

Symbol

Nominjin Stonkolk

) Ko poki bone. ahem atwe re gy. net persilation of living tissue and less than µm HE (art. no. 21

7 45 1140 65 174 Openwork 71 54 1120 63 45 * 40 50 970 62 450 * 9 43 #40 38 174 » ™) SS S10 56 450 » 100) 40 750 SS 450 . and 43 670) 56 174 » Wd 50 650 53 m! . 120 54 ohm) 55 Mi) » 130 50 SK) M) M! » 140 43 SOX) 48 m „ 15 43 VN) S4 174 * 159 54 460 m) SUH) » 160) 48 440 Su 45 „ 170 50 410 48 450 * 180 52 360 45 450 » 19 43 360 48 RU) 7 350 4? 450 * 200 50 39 +H 451 "21 47 310 +4 RU) * 210 42 300 42 45 * 23 42 280 43 260" 230 49 278 40 45 * as 46 270 48 260 * 2949 50 200 "aS 28 5 42 45 * 260AX - - 45 . 2 4h 240 +H su ” UH 43 240 44 au Linen 2 45 23) 47 420) Openwork 4) 43 23) 41 Su lo ac 29H 43 240 41 34 No. 7 m 3N sau Openwork 47 36 ou 35 4h 164) 32 321 Combined 35H 46 160 32 420 Linen as 39 150 37 Tsu Combined ZN 29 150 Mv YOU Linen 43 35 130 33 174 Combined

P. 12 GOST 4403-91

Ueloznoe SATO TREE

Prizruiostnats

hole size

Kochfrinisit

live section. ©

abraded ¢

Combined Linen Combined Linen Combined Linen Combined Linen Combined Linen Combined Linen Combined Go same

Note. Article 71 applies to weighted fabrics with holes Ta bon.

GOST 4403-91 S. 13

MOH SDC spruce SYN

RAINZJOEICHI

(ooh ol HOYT A UEMS en (Ooh OL TL LOVEE A LOST) 08 (OLE EO HOST A NS HOYT A (Ost) Oe torch yds (O00) Os COLT Oe (Ost) ae ST ty

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(00¢) GOL ONUW NH

106) OL (WL OC fost ag

COX LETH it:

(06h OL (O6b OE (AO TATE Og AND COSTE OS (ORL 02 AND HH FUSE)) OZ

not C000) Os (or bb Og AND CORDES Ts

LOS OS (00K) GOT

mor IT: WH OUI MH OHOLY WH IT: WH OHO WH WH this WH it MH this; MUN ono MH OWL WH OHO MH AND MH OHOLY WH OHO DY MH OHOW WH OUT MH nod WH HOW MH MH

NOA WH MUN

OLY +6: sor sor SOF OF KE

M. tot ot

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mot m m0 [|

BUK CHE NOE MSI

hy 1 HM! Mol Mil U: 1 #91 HN 51 ONU Mtl bye HNC! Nel Me hye l VUI UUI 401 №6 U

CEH MET) Tel WALT PO AOTMOLIY

P. 14 GOST 4403-91

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GOST 4403-91

INTERSTATE STANDARD

GENERAL SPECIFICATIONS

Official edition

IPK PUBLISHING STANDARDS Moscow

INTERSTATE STANDARD

FABRICS FOR SIEVE FROM SILK AND SYNTHETIC THREADS

General specifications

Fabrics of silk and synthetic threads for sieves. General specifications

OKP 83 7816.83 7856

Introduction date 01.01.93

This International Standard applies to screen fabrics made from silk and synthetic threads.

The requirements of this standard are mandatory, except for and. 2.2 which is the recommended one.

1. TECHNICAL REQUIREMENTS

1.1. Fabrics for sieves must be manufactured in accordance with the requirements of this standard for technological modes approved in the prescribed manner.

Synthetic threads used for the manufacture of fabrics used in the food industry must be approved for use by the state sanitary supervision authorities.

1.2. Main parameters and dimensions

1.2.1. Screen fabric is a fabric made by weaving one or more systems of warp (longitudinal) and weft (cross) threads to form a regular structure.

1.2.2. Fabrics must be produced from natural silk threads in accordance with GOST 5618 and synthetic (kapron, polyester and polyamide monofilament threads) according to regulatory and technical documentation.

1.2.3. Fabrics should be worked out by weaving: plain (Fig. 1), twill (Fig. 2), openwork (Fig. 3), semi-false openwork (Fig. 4) and combined (Fig. 5).

Plain weave Twill weave

Official publication Reprint prohibited

© Standards Publishing House, 1991 © IPK Standards Publishing House, 2002

openwork weave

Semi-false openwork weave

Combined weave

where li is the distance between the warp threads at the base of the hole, microns;

/ 0 - greatest distance between two warp threads in the hole, microns;

1 y is the distance between the weft threads, microns.

A group of threads that fit tightly together and leave no free space is considered one thread.

1.2.4. Fabrics must be produced in pieces, m, not less than:

5 - from synthetic threads;

2 - from natural silk.

1.2.5. Fabrics from natural silk are washed and dressed after weaving, and fabrics from synthetic threads are subjected to heat fixation in a harsh or boiled form.

1.2.6. Fabrics must be made in widths from 97 to 165 cm. The nominal width of the fabric is set by agreement between the manufacturer and the consumer.

1.3. Characteristic

1.3.1. Fabrics according to physical and mechanical parameters, defects in appearance, division into groups must meet the requirements specified in Table. 1 and 2.

Table 1

* The indicator is set for fabrics with the symbol PA and FC used in the flour-grinding industry.

Note. The symbol for fabrics is given in Appendix 1.

table 2

1.3.2. The elongation at break of a strip of fabric measuring 50 x 200 mm should be, in percent, not more than:

26 - for fabrics made of natural silk;

35 - for fabrics made of synthetic threads of group A;

45 - for fabrics made of polyester threads, polyamide threads of group B and fabrics of the symbol "PA" with more than 58 holes per 1 cm.

1.3.3. Elongation of a strip of fabric with a size of 50 x 200 mm along the base at 10% load from the standard, in percent, not more than:

10.0 - for IF fabrics;

9.0 - for fabrics of different density and fabrics with the number of holes not more than 58 per 1 cm.

Note. The indicator “Strip elongation at 10% of the standard load” comes into effect from 01.01.95 and is set for fabrics used in the flour-grinding industry.

1.3.4. Determination of grade

1.3.4.1. The number of defects in appearance per 1 m 2 should not exceed that indicated in table. 3.

Table 3

Fabric group

The maximum number of defects in appearance, for fabrics

from natural silk

made of synthetic fibers

1.3.4.2. The name and size of defects in appearance allowed in the tissues are indicated in Table. 4.

Table 4

Note. Fabric defects and their definition - according to GOST 25506, GOST 27244 and Appendix 2.

1.3.4.3. The following defects are not allowed in fabrics:

earning foreign objects;

the defects exceeding the sizes specified in tab. 4.

1.3.4.4. The defects of the fabrics listed in clause 1.3.4.3 are subject to cutout at the manufacturer, or the location of the defect at the edge is marked with severe threads or a stamp "B" (conditional cutout).

The number of cuts or conditional cuts for a conditional length of 40 m should not exceed three.

1.3.4.5. Raw defects: mustaches, rallying, unstretched sections of the thread, sagging (for synthetic fabrics), striping, flesh stripes are not considered a defect.

1.3.5. Indicators characterizing the specific properties of each article of fabrics (minimum surface density, hole sizes, live section coefficient, name and linear density of threads) are provided in Appendices 3 and 4.

For fabrics of a new range, these indicators should be provided for in the technical documentation.

1.4. Marking

1.4.1. Both ends of a piece of fabric must be stamped with the name of the manufacturer and the number of the technical inspector.

The stamp should be placed with its long side along the cut of the fabric at a distance of no more than 100 mm from the edge of the cut and the edge of the fabric.

1.4.2. A label is attached to each piece of fabric indicating:

name of the manufacturer; his trademark;

fabric name and article number;

number and length of the piece; the number of conditional cuts; tissue groups; length of fabric in a piece, m; release dates;

designations of this standard.

1.4.3. It is allowed to attach a label or put a stamp on paper or film, in which a piece of fabric is packed, indicating the details of and. 1.4.2.

1.4.4. Transport marking - in accordance with GOST 7000 with the application of handling marks in accordance with GOST 14192 - "Keep away from moisture" and "Do not take with hooks."

1.5. Package

1.5.1. The fabric in the piece should be rolled into a roll or folded in meter-long folds.

1.5.2. Each piece of fabric should be folded in half along the width of the fabric and packed on all sides in paper, cellophane or polyethylene film and tied in two places with a braid (Fig. 6).

1.5.3. When packing a fabric folded in full width, the ends of the piece are left open.

Pieces of fabric with open ends must be additionally tied along the piece (Fig. 7).

1.5.4. Packing of fabrics for transportation - according to GOST 7000.

2. ACCEPTANCE

2.1. Acceptance - according to GOST 20566.

2.2. The frequency of fabric testing for physical-mechanical and physical-chemical parameters is established by the manufacturer.

3. TEST METHODS

3.1. Sampling - according to GOST 20566.

3.2. Checking the quality of fabrics in appearance is carried out by viewing them in reflected light on a grading table or machine.

3.3. Determination of linear dimensions and surface density - according to GOST 3811.

3.4. Determination of skew - according to GOST 14067.

3.5. Determination of breaking load and elongation at break and elongation at 10% of the standard load - according to GOST 3813 with the following additions: when using an Instron tensile testing machine (model 1026), the speed of the upper clamp is taken to be 100 mm/min; the tests are carried out on this machine without preload.

For the final elongation result at 10% of the standard load, the worst indicator of the arithmetic mean measurements for the warp or weft is taken.

3.6. Determination of the linear size of the hole

3.6.1. To determine the linear size of the hole, elementary samples prepared to determine the discontinuous characteristics are used.

3.6.2. Equipment

A micromacro projector is used to measure the hole parameters.

Note. It is allowed to measure the parameters of holes on a microscope with an eyepiece micrometer with a division value of 0.01 and 0.001 mm (depending on the size of the holes in the fabric for sieves) and with an image magnification of at least 50x for tissues with the number of holes up to 16 in 1 cm and at least 200x for other tissues.

3.6.3. Conducting a test

The hole size is determined by measuring three hole parameters (see Fig. 3): / 0 ; /, and /.

The parameters of the sieve holes are measured in groups located along the length of the elementary sample in different places. The measurement points are chosen in such a way that the warp or weft threads of one measurement point are not a continuation of the warp or weft threads of another.

On each elementary sample, 6-8 consecutive holes are measured. The total number of measured holes should be 50.

For the final result of the measurement parameters / about; /, and / take the arithmetic mean of all measurements for each parameter.

3.6.4. Results processing

The arithmetic mean of two or three parameters is taken as the linear size of the hole. The calculation is carried out with an accuracy of 0.1 µm.

3.7. Determining the number of holes per 1 cm of fabric

3.7.1. Determination of the number of holes per 1 cm of fabric is carried out on samples taken to determine the discontinuous characteristics.

3.7.2. Equipment

To determine the number of holes per 1 cm of tissue, a micromacroprojector is used.

3.7.3. On each strip of fabric prepared to determine the discontinuous characteristics, using a micromacroprojector, the length is measured along the warp L 0 and along the weft L, on which there are 15 rows of adjacent threads along with holes between them (Fig. 8).

O/ o g a 5 o % a 6 a 7 % %%

P

PGiP U

t:

P

The number of holes per 1 cm of fabric n 0 is calculated by the formula

n 0 \u003d -j- or P \u003d -g ±, b o b y

where n 0 and n y - the number of holes per 1 cm on the base or duck;

k 0 and k y - the number of warp or weft holes in the measured area;

L 0 and L y - the length of the measured section, mm, on which are located k 0 and k y adjacent holes with threads between them.

3.7.4. Results processing

The arithmetic mean of all warp or weft measurements is taken as the final measurement result.

The calculation is carried out with an accuracy of 0.1 and rounded up to a whole number.

3.8. Determination of the tissue cross-section coefficient

3.8.1. The coefficient of open section of the fabric (F c) (the percentage of the area of ​​​​the openings of the fabric) in percent is calculated by the formula

^s = 7^-100 = %b^

where n is the number of holes per 1 cm 2 of fabric, defined as the product of the number of holes in the warp and the number of holes in the weft;

5 0TV - the area of ​​one hole, microns 2, calculated by the formulas

^res = 0’5 / y (/ 0 + /,) - for sieve fabrics made of silk threads;

S is the tissue area equal to 1 cm 2 .

Calculations are carried out as a percentage with an accuracy of:

0.01 - for fabrics made of synthetic threads;

0.1 - for natural silk fabrics,

and rounding up to:

0.1 - for fabrics made of synthetic threads;

1.0 - for natural silk fabrics.

3.9. Determination of abrasion resistance

3.9.1. Sample selection

From a point sample taken according to GOST 20566, 4 elementary samples of 110 x 110 cm in size are cut.

3.9.2. Equipment

To carry out the test, the IT-3 device with corundum abrasive from emery stone grade EB 180 CM 2 is used.

3.9.3. Preparing for the test

Before starting work, the correctness of the readings of the device is checked by testing the control tissue.

As a control fabric, an unprepared linen fabric art. 72110 abrasion resistance (300 ± 50) cycles, at a pressure of 200 gf and a tension of 200 gf.

Before testing the control fabric, as well as before testing each new elemental sample, the abrasive discs must be cleaned of textile dust with a toothbrush or emery No. 180-200.

3.9.4. Conducting a test

The resistance of the fabric to abrasion is determined on an IT-3 type device. An elementary sample measuring 110 x 110 mm is fixed on a ring-shaped hoop. The hoop is set on a cone

device and gently lift until it comes into contact with the abrasive discs, while the rod with the ball produces a uniform tension on the fabric.

The amount of deflection of the fabric in millimeters under tension should be approximately the same for each fabric article and is controlled on the scale of the device. The fabric tension should be 100 gf.

Abrasion of an elementary sample occurs along the annular surface of the hoop with two corundum abrasives. Then pressure is created between the rubbing surfaces (elementary test and emery stone) using a lever and a weight of 100 gf.

The abrasion of the tested elemental sample is carried out to the hole (until the surface of the hoop is exposed anywhere). At the same time, the device automatically turns off, and the counter records the number of cycles-turns of the slider with abrasive discs.

3.9.5. Results processing

For the indicator "fabric resistance to abrasion" take the arithmetic mean of the results of four tests, calculated to the nearest whole number.

4. TRANSPORT AND STORAGE

4.1. Transportation and storage - according to GOST 7000 with the following changes:

it is allowed, in agreement with the consumer, to transport fabrics in containers or

covered motor vehicles without packaging;

containers and machines should be lined with paper or cardboard inside.

4.2. The sieve fabrics are stored in warehouses on pallets or racks, protected from direct sunlight and at least 1 m away from heating appliances.

CONVENTIONAL DESIGNATION OF FABRICS FOR SIEVE

The article of fabric for sieves is designated PU/V; where P is the number of holes per 1 cm on the warp or weft in the production of fabrics with the same density on the warp and weft; or the number of holes per 10 cm for weighted natural silk fabrics; and P \u003d P 0 + Pu - when producing fabrics of different density along the warp and weft; where P 0 - the number of holes in 1 cm on the base;

P y - the number of holes in 1 cm per duck;

Y - conventional letter designation of fabric, depending on the raw materials and technology used;

B is the nominal width of the fabric, cm.

In the production of fabrics for sieves, the following conventions are used:

N - a fabric made of natural silk, developed using a new technology;

K - fabric made of kapron threads;

PA - fabric made of polyamide threads;

KCh - fabric from kapron threads of the Chernihiv POKhV;

FC - fabric from kapron threads of the Chernihiv POKhV according to imported weaving technology;

PE - fabric made of polyester threads;

C - the fabric is worked out on STB type machines.

Notes:

1. The absence of a letter index in the article means that the fabric is made from natural silk.

2. In the article of the fabric, the number after the letter designation of the fabric indicates the diameter of the fishing line (in microns) used to make the fabric.

3. Weighted fabrics are sieve fabrics made from natural silk of higher linear density with a constant number of holes.

An example of a fabric symbol:

sieve fabric made from natural silk threads, with 25 holes in 1 cm and a width of 97:

fabric art. 25/97;

fabric for sieves, made from nylon threads of the Chernihiv PoHV, with the number of holes 19 in 1 cm and a width of 102:

fabric art. 19CH/102.

APPENDIX 2 Reference

The terms of vices and their definition

Table 5

APPENDIX 3 Reference

Screen fabrics made from natural silk fabrics

Table 6

Continuation of the table. 6

Note. Article 71 refers to weighted fabrics with 7 holes in 1 cm.

APPENDIX 4 Reference

Table 7

Screen fabrics made of synthetic fibers

GOST 4403-91 S. 13

14 GOST 4403-91

GOST 4403-91 S. 15

The name of the raw material and the nominal linear density of the thread, tex (diameter, micron)

Weave type

NPam Mono 3.3 (60)/ /NPam Mono 1.7 (43) NPam Mono 2.2 (50) NPam Mono 3.3 (60)/ /NPam Mono 1.7 (43) Also

NPam Mono 3.3 (60)/ /NPam Mono 1.7 (43) NPam Mono 2.2 (50) NPam Mono 2.2 (50)/ /NPam Mono 1.7 (50) NPam Mono 2.2 ( 50) Too

Note. In the designation ethereal.

raw material names letters mean:

NPam Mono 1.7 (43) Too

NPam Mono 1.2 (37) Too

NPam Mono 1.1 (35) NPam Mono 0.8 (30) NPef Mono 11.1 (90) NPef Mono 6.7 (80) NPef Mono 3.3 (55) NPef Mono 2.5 (48) NPef Mono 1.7 (40) NPef 1.7 (40)

NPef 1.3 (34)

NK-thread kapron;

NPam Mono 2.2 (50)

NPam Mono 2.2 (50) Too

NPam Mono 2.2 (50) Too

NPam Mono 2.2 (50)

NPam Mono 2.2 (50) Too

NPam Mono 1.7 (43) Too

semi-false

Linen

semi-false

Linen

semi-false

Linen

semi-false

Linen

NPam Mono 1.1 (35)

NPam Mono 0.8 (30)

NPef Mono 11.1 (90)

NPef Mono 6.7 (80)

NPef Mono 3.3 (55)

NPef Mono 2.5 (48)

NPef Mono 1.7 (40)

NPef 1.7 (40)

NPef 1.3 (34)

NPam - polyamide thread; NPef - thread poly-

Sarzhevoe

Linen

Sarzhevoe

16 GOST 4403-91

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the State Committee for Light Industry under the State Planning Committee of the USSR

2. APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Product Quality Management and Standards dated June 27, 1991 No. 1109

3. REPLACE GOST 4403-77, OST 17-46-82

4. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

Item number

GOST 3811-72 GOST 3813-72 GOST 5618-80 GOST 7000-80 GOST 14067-91 GOST 14192-96 GOST 20566-75 GOST 25506-82 GOST 27244-93

5. REPUBLICATION. November 2001

Editor T.P. Shashina Technical editor O.N. Vlasova Proofreader E.D. Dulneva Computer layout O.V. Arseeva

Ed. persons. No. 02354 dated 07/14/2000. Handed over to the set 11/28/2001. Signed for publication on 11.01.2002. Uel. oven l. 2.32. Uch.-ed.l. 1.70.

Circulation 155 copies. From 3411. Law. 39.

IPK Publishing House of Standards, 107076, Moscow, Kolodezny per., 14. e-mail: Typed in the Publishing House on a PC

Branch of IPK Publishing house of standards - type. "Moscow printer", 103062, Moscow, Lyalin per., 6.

GENERAL SPECIFICATIONS

Official edition

IPK PUBLISHING STANDARDS Moscow

INTERSTATE STANDARD

FABRICS FOR SIEVE FROM SILK AND SYNTHETIC THREADS

General specifications

Fabrics of silk and synthetic threads for sieves. General specifications

OKP 83 7816.83 78S6__

Date of maintenance 01.01.93

This International Standard applies to screen fabrics made from silk and synthetic threads.

The requirements of this standard are mandatory, except for and. 2.2 which is the recommended one.

1. TECHNICAL REQUIREMENTS

1.1. Fabrics for sieves must be manufactured in accordance with the requirements of this standard for technological modes approved in the prescribed manner.

Synthetic yarns used to make fabrics used in niche industries. must be approved for use by state sanitary inspection authorities.

1.2. Main parameters and dimensions

1.2.1. Screen fabric is a fabric made by weaving one or more systems of warp (longitudinal) and weft (cross) threads to form a regular structure.

1.2.2. Fabrics must be produced from natural silk threads in accordance with GOST 5618 and synthetic (kapron, polyester and polyamide monofilament threads) according to regulatory and technical documentation.

1.2.3. Fabrics should be worked out by weaving: linen (Fig. I), twill (Fig. 2), openwork (Fig. 3), half-laid openwork (Fig. 4) and combined (Fig. 5).

Plain weave Twill weave

Official publication Reprint prohibited

© Standards Publishing House, 1991 © I PK Standards Publishing House. 2002

S. 2 GOST 4403-91

openwork weave

where /, is the distance between the warp threads at the base of the hole, microns;

4, - the largest distance between two warp threads in the hole, microns;

1 y is the distance between the weft pins, microns.

A group of threads that fit snugly together and leave no free space is considered one thread.

1.2.4. Fabrics must be produced in pieces, m, not less than:

5 - from synthetic threads;

2 - from natural silk.

1.2.5. After weaving, fabrics made from natural silk are washed and finished, and fabrics made from synthetic threads are subjected to harsh or boiled form.

1.2.6. Fabrics must be made in widths from 97 to 165 cm. The nominal width of the fabric is set by agreement between the manufacturer and the consumer.

1.3. Characteristic

1.3.1. Fabrics according to physical and mechanical parameters, defects in appearance, division into groups must meet the requirements specified in Table. I and 2.

1.3.2. The elongation at break of a strip of fabric measuring 50 x 200 mm should be, in percent, not more than:

26 - for fabrics made of natural silk;

35 - for fabrics made of synthetic threads of group A;

45 - for fabrics made of polyester yarns, polyamide yarns of group B to fabrics of the symbol “PA*” with more than 58 holes per I cm.

1.3.3. Elongation of a strip of fabric with a size of 50 x 200 mm along the base at 10% load from the standard, in percent, ns more:

10.0 - for IF fabrics:

9.0 - for fabrics of different density and fabrics with the number of holes not more than 58 per I cm.

Note. The indicator “Strip elongation at 10% of the standard load” comes into effect from 01.01.95 and is set for fabrics used in the flour-grinding industry.

1.3.4. Determination of grade

1.3.4.1. The number of defects in appearance per I m 2 should not exceed that indicated in table. 3.

Table 3

Fabric group

The maximum number of defects in appearance, for fabrics

made of synthetic fibers

from natural silk

1.3.4.2. The name and size of defects in appearance allowed in the tissues are indicated in Table. 4.

1.3.4.3. The following defects are not allowed in fabrics:

earnings of foreign objects:

the defects exceeding the sizes specified in tab. 4.

1.3.4.4. The defects of the fabrics listed in clause 1.3.4.3 are subject to cutout at the manufacturer, or the location of the defect at the edge is marked with severe threads or a stamp "B" (conditional cutout).

The number of cuts or conditional cuts for a conditional length of 40 m should not exceed three.

1.3.4.5. Raw defects: mustaches, rallying, unstretched sections of the thread, sagging (for synthetic fabrics), stripes, flesh stripes are not considered a defect.

1.3.5. Indicators characterizing the specific properties of each article of fabrics (minimum surface density, hole sizes, live section coefficient, name and linear density of threads) are provided in Appendices 3 and 4.

For fabrics of a new range, these indicators should be provided for in the technical documentation.

1.4. Marking

1.4.1. Both ends of a piece of fabric must be stamped with the name of the manufacturer and the number of the technical inspector.

The stamp should be placed with its long side along the cut of the fabric at a distance of no more than 100 mm from the edge of the cut and the edge of the fabric.

1.4.2. A label is attached to each piece of fabric indicating:

name of the manufacturer: its trademark:

fabric name and number; SKU:

number and length of the piece; number of conditional cuts: fabric groups; length of fabric in a piece, m; release dates;

designations of this standard.

1.4.3. It is allowed to attach a label or put a stamp on paper> "or a film in which a piece of fabric is packed, indicating the details according to clause 1.4.2.

1.4.4. Transport marking - in accordance with GOST 7000 with the application of handling marks in accordance with GOST 14192 - "Keep away from moisture" and "Do not take with hooks."

1.5. Package

1.5.1. The fabric in the piece should be rolled into a roll or folded in meter-long folds.

1.5.2. Each piece of fabric should be folded in half along the width of the fabric and packed on all sides in paper, cellophane or polyethylene film and tied in two places with a braid (Fig. 6).

1.5.3. When wrapping a full-width folded fabric, the torns of the piece are left open.

Pieces of fabric with open ends must be additionally tied along the piece (Fig. 7).

1.5.4. Packing of fabrics for transportation - in accordance with GOST 7000.

2. ACCEPTANCE

2.2. The frequency of fabric testing for physical-mechanical and physical-chemical parameters is established by the manufacturer.

3. TEST METHODS

3.2. Checking the quality of fabrics in appearance is carried out by viewing them in reflected light on a grading table or machine.

3.3. Determination of linear dimensions and surface density - according to GOST 3811.

3.4. Determination of skew - according to GOST 14067.

3.5. Determination of breaking load and elongation at break and elongation at 10% of the standard load - according to GOST 3813 with the following additions: when using an Instron tensile testing machine (model 1026), the speed of the upper clamp is taken to be 100 mm/min; the tests are carried out on this machine without preload.

For the final elongation result at 10% of the standard load, the worst indicator of the arithmetic mean measurements for the warp or weft is taken.

3.6. Determination of the linear size of the hole

3.6.1. To determine the linear size of the hole, elementary samples prepared to determine the discontinuous characteristics are used.

3.6.2. Equipment

A micromacro projector is used to measure the hole parameters.

Note. It is allowed to measure the parameters of the holes on a microscope with an eyepiece microscope with a division yen of 0.01 and 0.001 mm (depending on the size of the holes in the tissue for sieves) and with an image magnification of ns less than 50x for tissues with the number of holes up to 16 in I cm and ns less than 200x for other tissues .

3.6.3. Conducting a test

The hole size is determined by measuring three hole parameters (see Fig. 3): / 0 ; /, and /.

The parameters of the sieve holes are measured in groups located along the yatins of the elementary sample in different places. The measurement points are chosen in such a way that the warp or weft threads of one measurement point are not a continuation of the warp or weft threads of another.

On each elementary sample, 6-8 consecutive holes are measured. The total number of measured holes should be 50.

For the final result of the measurement parameters / about; /, and / h take the arithmetic mean of all measurements for each parameter.

3.6.4. Results processing

The arithmetic mean of two or three parameters is taken as the linear size of the hole. The calculation is carried out with an accuracy of 0.1 µm.

3.7. Determining the number of holes per 1 cm of fabric

3.7.1. Determination of the number of holes per I cm of tissue is carried out on samples taken to determine the discontinuous characteristics.

3.7.2. Equipment

To determine the number of holes per 1 cm of tissue, a micromacroprojector is used.

3.7.3. On each strip of fabric prepared to determine the discontinuous characteristics, with the help of a micromacroprojector, the length is measured along the warp L 0 and along the weft L, on which there are 15 rows of adjacent threads along with holes between them (Fig. 8).

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GOST
4403-91

Fabrics of silk and synthetic

threads for sieves.

General specifications
OKP 83 7816, 83 7856
Introduction date 01.01.93
This International Standard applies to screen fabrics made from silk and synthetic threads.
The requirements of this standard are mandatory, except for clause 2.2, which is recommended.
1. TECHNICAL REQUIREMENTS
1.1. Fabrics for sieves must be manufactured in accordance with the requirements of this standard according to the technological regimes approved in the established order.
Synthetic threads used for the manufacture of fabrics used in the food industry must be approved for use by the state sanitary supervision authorities.
1.2. Main parameters and dimensions
1.2.1. Screen fabric is a fabric made by weaving one or more systems of warp (longitudinal) and weft (cross) threads to form a regular structure.
1.2.2. Fabrics must be produced from natural silk threads in accordance with GOST 5618 and synthetic (nylon, polyester and polyamide monofilament threads) according to normative and technical documentation.
1.2.3. Fabrics should be worked out by weaving: plain (Fig. 1), twill (Fig. 2), openwork (Fig. 3), semi-false openwork (Fig. 4) and combined (Fig. 5).

(WITH) Standards Publishing House, 1992 Real the standard cannot be fully or partially reproduced, replicated and distributed without the permission of the State Standard of the USSR

S. 2 GOST 4403-91
plain weave
Twill weave
with
d
P __til
with
P
3
tz -st
Heck. one
Heck. 2
openwork weave
Semi-false openwork weave

G
1
1
h
»
L
1
and
Heck. 3
Heck. 4

GOST 4403-91 S. 3
Combined weave
La

Heck. 5
where 1\ - distance between the warp threads at the base of the hole, microns; 1„ - the largest distance between two warp threads in
holes, microns; / y - the distance between the weft threads, microns.
A group of threads that fit tightly together and leave no free space is considered one thread.
1.2.4. Fabrics must be produced in pieces, m, not less than: 5 - from synthetic threads;
2 - from natural silk.
1.2.5. Fabrics from natural silk are washed and dressed after weaving, and fabrics from synthetic threads are subjected to heat fixation in a harsh or boiled form.
1.2.6. Fabrics must be made in widths from 97 to 165 cm. The nominal width of the fabric is set by agreement between the manufacturer and the consumer.
1.3. Characteristic
1.3.1. Fabrics according to physical and mechanical parameters, defects in appearance, division into groups must meet the requirements specified in Table. 1 and 2.
2 Dec. 2113

S. 4 GOST 4403-91
TableI
Norms for woven!
from natural silk
made of synthetic fibers
Group A
Group B
Group A
Group B
Deviation from nominal
width,%> no more Relative deviation
2, 0
3, 0

2, 0
3, 0
surface density
sti from the minimum allowable,%, no more
_
15, 0

_
10, 0
Quantity deviation
vu holes per 1 cm,%, no more Relative deviation
6, 0
15, 0

8, 0
15, 0
deviation of the average hole size from the nominal one, %, no more
15, 0
25, 0

12, 0
20, 0
Maximum deviation
size reduction of individual
versions from nominal, %, no more
-
.--

20, 0*
20, 0*
* The indicator is set for fabrics with the conditional designation PA and FC used in the flour-grinding industry.
Note. The symbol for fabrics is given in Appendix 1.
table 2
Breaking load of a saw blade of fabric with a size of 50X200 mm, daN, but min
Type of fabric

Talking-

density

fabrics, g / m 2
Weave type
linen
twill
but nurnos

semi-false openwork
combined
Natural silk fabrics
Synthetic yarn fabrics
Up to 37 38-47 48-61
Up to 37 38-47 48-61 62-99
St. 100
16 20
19
25 35 50 80
25 30
24 30 45
16. 210
27 29 37
1.3.2. The elongation at break of a strip of fabric measuring 50 X X 200 mm should be, in percent, not more than: 26 - for fabrics made of natural silk;

GOST 4403-91 WITH, 5
35 - for fabrics made of synthetic threads of group A;
45 - for fabrics made of polyester threads, polyamide threads of group B and fabrics of the symbol "PA" with more than 58 holes per 1 cm.
1.3.3. Elongation of a strip of fabric with a size of 50X200 mm along the base at 10% load from the standard, in percent, not more than:
10, 0 - for IF tissues;
9, 0 - for fabrics of different density and fabrics with the number of holes not more than 58 per 1 cm.
Note. The indicator “Strip elongation at 10% of the standard load” comes into effect from 01/01/95 and is set for fabrics used in the flour-grinding industry.
1.3.4.Determination of grade
1.3.4.1. The number of defects in appearance per 1 m 2 should not exceed that indicated in table. 3.
Table 3

Limit number of vices

external guide, for woven
Fabric group
from natural walking! a

made of synthetic fibers
A B
8 15

13
1.3.4.2. The name and size of external defects allowed in tissues are indicated in Table. 4.
Table 4
Name of vice
tissue defect size
Blizzard, see, no more
Braids, cm, no more
Diving, see, no more
Undercuts and nicks, cm, no more
Thickened threads more than 3 times the thickness of the thread, cm, no more
Tension of individual threads, cm, no more
Spots, cm 2, no more
Reed cutting not more than one and a half size of the hole, cm, not more than:
for fabrics of group A
for fabrics of group B
Breakage of the base, cm, no more than:
for fabrics of group A
for fabrics of group B
Note. Tissue defects and their definition - 27244 and Appendix 2.

10
4
10
20
8 15
on GOST 25506, GOST

With 6 GOST 4403-91
1.3.4.3. The following defects are not allowed in fabrics: foreign objects;
holes;
the defects exceeding the sizes specified in tab. 4.
1.3.4.4. The defects of the fabrics listed in paragraph 1.3.4.3 are subject to cutout at the manufacturer, or the location of the defect at the edge is marked with severe threads or a stamp "B" (conditional cutout).
The number of cuts or conditional cuts for a conditional length of 40 m should not exceed three.
1.3.4.5. Raw defects: mustaches, rallying, unstretched sections of the thread, sagging (for synthetic fabrics), striping, flesh stripes are not considered a defect.
1.3.5. Indicators characterizing the specific properties of each article of fabrics (minimum surface density, hole sizes, live section coefficient, name and linear density of threads) are provided in Appendices 3 and 4.
For fabrics of a new range, these indicators should be provided for in the technical documentation.
1.4. Marking
1.4.1. Both ends of a piece of fabric must be stamped with the name of the manufacturer and the number of the technical inspector.
The stamp should be placed with its long side along the cut of the fabric at a distance of no more than 100 mm from the edge of the cut and the edge of the fabric.
1.4.2. A label is attached to each piece of fabric indicating:
name of the manufacturer; his trademark;
fabric name and article number;
number and length of the piece;
the number of conditional cuts;
tissue groups;
length of fabric in a piece, m-;
release dates;
retail price 1 m;
designations of this standard.
1.4.3. It is allowed to attach a label to the paper or film in which a piece of fabric is packed, or put a stamp indicating the details according to clause 1.4.2.
1.4.4. Transport marking - in accordance with GOST 7000 with the application of handling signs in accordance with GOST 14192 - "Afraid of dampness" and "Do not take directly with hooks."
1.5. Package
1.5.1. The fabric in the piece should be rolled into a roll or folded in meter-long folds.

GOST 4403-91 C, 7
1.5.2. Each piece of fabric should be folded in half along the width of the fabric and wrapped on all sides in paper, cellophane or plastic wrap and tied in two places with a braid (Fig. 6),

Heck. 6
1.5.3. When packing a fabric folded in full width, the ends of the piece are left open.
Pieces of fabric with open ends must be additionally tied along the piece (Fig. 7).

Heck. 7
1.5.4. Packing of fabrics for transportation - according to GOST 7000.
2. ACCEPTANCE
2.1. Acceptance - according to GOST 20566.
2.2. The frequency of fabric testing for physical-mechanical and physical-chemical parameters is established by the manufacturer.
3. TEST METHODS
3.1. Sampling - according to GOST 20566.
3.2. Checking the quality of fabrics in appearance is carried out by viewing them in reflected light on a grading table or machine.
3.3. Determination of linear dimensions and surface density - according to GOST 381 1.

S. 8 GOST 4403-91
3.4 Determination of skew - according to GOST 14067.
3.5. Determination of breaking load and elongation at break and elongation at 10% load from the standard - according to GOST 3813 with the following additions: when using an Instron tensile testing machine (model 1026), the top clamp movement speed is 100 mm/min; the tests are carried out on this machine without preload.
For the final result of elongation at 10% of the standard load, the worst indicator of the arithmetic average measurements for the warp or weft is taken.
3.6. Determination of the linear size of the hole
3.6.1. To determine the linear size of the hole, elementary samples prepared to determine the discontinuous characteristics are used.
3.6.2. Equipment
A micro-macro projector is used to measure hole parameters.
Note. It is allowed to measure the parameters of the holes on a microscope with an eyepiece micrometer with a division value of 0.01 and 0.001 mm (depending on the size of the holes in the tissue for sieves) and with an image magnification of at least 50 v for tissues with the number of holes up to 16 in 1 cm and not less 2100X for other fabrics.
3.6.3. Conducting a test
The size of the holes is determined by measuring three parameters of the hole (see Fig. 3): l 0 ; U and / y.
The parameters of the sieve holes are measured in groups located along the length of the elementary sample in different places. Measurement points 1 are chosen so that the warp or weft threads of one measurement point are not a continuation of the warp or weft threads of another.
On each elementary sample, 6-8 consecutive holes are measured. The total number of measured holes should be 50.
For the final result of measuring the parameters / 0 ; h and / y take the arithmetic mean of all measurements for each parameter.
3.6.4. Results processing
The arithmetic mean of two or three parameters is taken as the linear size of the hole. The calculation is carried out with an accuracy of OD microns.
3.7. Determining the number of holes per 1 cm of fabric
3.7.1. Determination of the number of holes per 1 cm of fabric is carried out on samples taken to determine the discontinuous characteristics. ,

GOST 4403-91 S. 9
3.7.2. Equipment
To determine the number of holes per 1 cm of tissue, a micromacroprojector is used.
3.7.3. On each strip of fabric prepared to determine the discontinuous characteristics, using a micromacroprojector, the length is measured along the warp L, and along the weft L y , on which there are 15 rows of adjacent threads along with holes between them (Fig. 8).
Number of holes per 1 cm of fabric n 0 calculated according to the formula
10k about 1°%
P 0 = , OR AND y = -:----- ,
L0 Ly

where l „and p y- the number of holes per 1 cm on the warp or weft; Ko and k y - the number of warp or weft holes in the measured area; b 0 and L y- the length of the measured section, mm, on which k 0 and Ku are located next to the lying holes with threads between them.
3.7.4.Results processing
The arithmetic mean of all warp or weft measurements is taken as the final measurement result.
The calculation is carried out with an accuracy of 0, 1 and rounded up to a whole number.
about, o g 0j o ± o 5 o 6 a 7 Su %%
^C
P__ cz
G~1
-about.
J.O.
1 G
^ With

~^P
-\-
& r-1
Tr4xr~Lr-r4J
that
that
G
P~
Lo
Heck. eight

P. 10 GOST 4403-91
3.8. Determination of the coefficient of the open section of the tissue
3.8.1. Fabric open area factor (F c)(percentage of tissue opening area) as a percentage is calculated by the formula
with~~ S-10 8" IUU ~ 1Q6 -
where P- the number of holes per 1 cm 2 of fabric, defined as the product of the number of holes in the base by the number of holes in the weft;
n \u003d n 0 -n y
Sotb.- the area of ​​one hole, microns 2, calculated by the formulas
5otv \u003d 0.5 / y (/ o +/ 1) - for sieve fabrics made of silk threads;
5 - tissue area equal to 1 cm 2 .
Calculations are carried out as a percentage with an accuracy of:
0, 01 - for fabrics made of synthetic threads;
0, 1 - for fabrics made of natural silk,
and rounding up to:
0, 1 - for fabrics made of synthetic threads;
1, 0 - for natural silk fabrics.
3.9. Determination of abrasion resistance
3.9.1. Sample selection
From a point sample taken in accordance with GOST 20566, 4 elementary samples are cut off with a size of 110X 110 cm.
3.9.2. Equipment
To carry out the test, the IT-3 device with corundum abrasive from emery stone grade EB 180 CM 2 is used.
3.9.3. Preparing for the test
Before starting work, the correctness of the readings of the device is checked by testing the control tissue.
As a control fabric, an unprepared linen fabric art. 72110 abrasion resistance (300 ± 50) cycles, at a pressure of 200 gf and a tension of 200 gf.
Before testing the control fabric, as well as before testing each new elemental sample, the abrasive discs must be cleaned of textile dust with a toothbrush or emery No. 180-200.
3.9.4. Conducting a test
The resistance of the fabric to abrasion is determined on a device of the type IT-3. An elementary sample measuring 110X110 mm is fixed on a ring-shaped hoop. The hoop is set on device cone

GOST 4403-91 S. II
pa and gently lift until it comes into contact with the abrasive discs, while the rod with the ball produces an even tension on the fabric.
The amount of deflection of the fabric in millimeters under tension should be approximately the same for each fabric article and is controlled on the scale of the device. The fabric tension should be 100 gf.
Abrasion of an elementary sample occurs along the annular surface of the hoop with two corundum images. Then pressure is created between the rubbing surfaces (elementary test and emery stone) using a lever and a weight of 100 gf.
The abrasion of the tested elemental sample is carried out to the hole (until the surface of the hoop is exposed anywhere). At the same time, the device automatically turns off, and the counter records the number of cycles of the runner with abrasive discs.
I.9.5. Results processing
- and the indicator"fabric resistance to abrasion" is taken as the arithmetic mean of the results of four tests, calculated to the nearest whole number.
4. TRANSPORT AND STORAGE
4.1. Transportation and storage - according to GOST 7000 with the following changes:
it is allowed, in agreement with the consumer, to transport fabrics in containers or covered vehicles without packaging;
containers and machines should be lined with paper or cardboard inside.
4.2. Fabrics for sieves are stored in warehouses on pallets or racks, protected from direct sunlight and at a distance of at least 1 m from heating devices.

WITH. 12 GOST 4403-91
APPENDIX 1 Recommended
CONVENTIONAL DESIGNATION OF FABRICS FOR SIEVE
The article of fabric for sieves is designated PU/V; where P is the number of holes per 1 cm on the warp or weft in the production of fabrics with the same density on the warp and weft; or the number of holes per 10 cm for weighted natural silk fabrics; and P \u003d P 0 + P y - when producing fabrics of different density along the warp and weft; where P 0 - the number of holes in 1 cm on the base; Pu - the number of holes in 1 cm per duck; Y - conditional letter designation of fabric, depending on the raw materials and technology used; B is the nominal width of the fabric, cm.
In the production of fabrics for sieves, the following symbols are used: H - a fabric made of natural silk, developed using a new technology; K - fabric made of kapron threads; PA - fabric made of polyamide threads; KCh - fabric from kapron threads of the Chernihiv POKhV;
FC - fabric from kapron threads of the Chernihiv POKhV according to imported weaving technology; PE - fabric made of polyester threads; C - the fabric is worked out on STB type machines.
Notes:
1. The absence of a letter index in the article means that the fabric is made from natural silk.
2. In the article of the fabric, the number after the letter designation of the fabric indicates the diameter of the fishing line (in microns) used to make the fabric.
3. Weighted fabrics are sieve fabrics made from natural silk of higher linear density with a constant number of holes.
An example of a fabric symbol:
sieve fabric made from natural silk threads, with 25 holes in 1 cm and a width of 97:.
fabric art. 25/97; fabric for sieves, made from nylon threads of the Chernihiv PoHV, with the number of holes 19 in 1 cm and a width of 102:
fabric art. 19CH/102.

GOST 4403-91 WITH. 13
APPENDIX 2 Reference
The terms of vices and their definition
Table 5
vices
Definition
Earning a foreign object
Individual thread tensions
Stripes
Broken base
dark stripes
Foreign object woven into fabric (yarn, fluff, metal, wood, etc.)
A local defect in the fabric in the form of a woven warp or weft thread that differs from neighboring ones in sheen
A common tissue defect characterized by the presence of sections of threads that differ in whiteness
Local defect of the fabric in the form of warp threads spreading due to their non-parallel earnings in the fabric
Local tissue defect in the form of dark stripes on the warp or weft
The ends of the threads on the surface of the fabric

P. 14 GOST 4403-91
APPENDIX 3 Reference
Screen fabrics made from natural silk fabrics
Tableb
Conditional
Resistance to
designation
Surface-
Nominal
Coefficient
abrasion
sieve fabric
density,
hole size
lively: About the cross-

cycles, not ma-
weave
neither (article)
g/m 2 , not less
sty, µm
nia, %
her
7
45
1140
65
175
Openwork
71
54
1120
63
450
»
80
50
970
62
450
»
9
43
840
58
175
, »
90
55
810
56
450
»
100
50
750
58
450
»
11
43
670
56
175
»
ON
50
650
54
500
»
120
53
600
55
500
»
130
50
540
50
500
»
140
52
500
48
500
>
15
43
490
54
175
»
150
54
460
50
500
»
160
48
440
50
450
»
170
50
410
48
450
»
180
52
360
45
450
»
19
43
360
48
200
»
190
47
350
47
450
»
200
50
320
44
450
»
21
47
310
44
200
»
210
52
300
42
" 450
»
23
42
280
43
260
»
230
49
275
40
45"
»
25
46
270
48
260
»
240
50
260
38
450
»
250
52
250
42
450
»
260
53
- ,
-
450
»
27
48
240
44
310
»
27N
43
240
44
310
Linen
2v0
48
220
47
420
Openwork
29
43
220
41
310
Same
29N
43
220
41
310
Linen
32
47
200
38
310
Openwork
32N
47
200
36
310
Linen
35
48
160
32
320
Combined
35N
46
160
32
320
Linen
38 .
39
150
37
180
Combined
38N
29
150
37
180
Linen
43
35
130
33
175
Combined

GOST 4403-91 S. 15
Continuation of the table. 6
Symbol for sieve fabric (article)
Surface density, g / m g, but less
Nominal hole size, µm
Clear section coefficient, °i
Abrasion resistance, cycles, not less
weave
43N
35
130
33
175
Linen
46
35
120
32
175
Combined
46N
35
120
32
175
Linen
49
35
ON
30
175
Combined
49N
35
ON
30
175
Linen
52
38
105
28
150
Combined
52N
38
105
28
150
Linen
55
30
100
33
120
Combined
55N
25
100
33
120
Linen
58
29
95
35
120
Combined
* 58N
27
95
35
120
Linen
61
33
90
35
120
Combined
61H
28
90
28
120
Linen
64
34
85
28
120
Combined
67
27
80
32
120 "
Same
70
29
75
30
120 .
»
73
30
70
26
120
>
76
31
65
25
120
»
Note. Article 71 refers to weighted fabrics with 7 holes in 1 cm.

Screen fabrics made of synthetic fibers

Conditional
Over-
Nominal
Coeffi-
yarn count, tex
(diameter, mk)
designation
density,
size from -
live cross-section
sieve cloth
(vendor code)
g / m 2, not
versions,
nia, %
less
micron
basics
duck
7K
125
1093
58, 5
NK Mono 300 (300)
NK Mono 100 (3
8K
78
1013
65, 6
NK Mono 50 (200)
NK Mono 50 (2
9K
87
874
62, 0
Same
Same
yuk
90
763
58, 2
»
»
PC
ON
677
54, 6
»
»
pccs
120
669
54, 2
NKMono 51.3 (240)
NKMono 51, 3 (2
13CoES
55
619
64, 8
NK Mono 20 (150)
NKMono 20 (150
13K
45
619
64, 5
NKMono 20 (130)
NKMono 20 (130
12K
120
596
51, 2
NK Mono 50 (200)
NK Mono 50 (2O0
12CoES
135
593
50, 7
NKMono 51, 3 (240)
NK Mono 51, 3 (2
14CoES
61
564
62, 4
NKMono 20 (150)
NKMono 20 (150
14K
50
564
62, 3
NK Mono 20 (130)
NKMono 20" (130
15CoES
63
517
60, 0
NKMono 20 (1, 50)
NKMono 20 (150
15K
50
517
60, 1
NKMono 20 (130)
NK Mono 20 (130
16CoES
68
475
57, 8
NKMono 20 (150)
NKMono 20 (150
I6K
55
475
57, 8
NKMono 20 (130)
NK Mono 20 (130
17CoES
73
438
55, 5
NK Mono 20 (150)
NKMono 20 (150
17K
60
438
55, 5
NKMono 20 (130)
NKMono 20 (130
19KCH
26
436
68, 5
NK Mono 7, 2 (90)
NK Mono 7, 2 (90
19K
35
420
63, 7
NK Mono 10 (90)
NKMono 10 (90
20KCH
27
410
67, 0
NK Mono 7, 2 (90)
NK Mono 7, 2 (90
19CoES
50
406
59, 6
NK Mono 12, 8 (120)
NK Mono 12, 8 (1

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Name of raw material and nominal linear area
Conditional
Over-
Nominal
Ko ef4 and -
threads, tex
(diameter, mk)
designation
density,
hole size,
alive
sieve cloth
(vendor code)
g/m 2 , not less
micron
section,
basics
duck
73K
30
93
41, 5
NK Mono 2, 2 (50)
NK Mono 2, 2 (
76K
30
82
48, 9
Same
Same
6.5Ch-340
147
1180
59, 0
NPam Mono 103 (340)
NPam Mono 10
7.5Ch-340
154
1000
58, 0
Same
Same
8Ch-30O
139
950
57, 5
NPam Mono 80 (300)
NPam Mono 8
8.7PCH-ZO0
140
850
56, 0
Same
Same
9.3Ch-270
133
800
55, 0
NPam Mono 65 (270)
NPam Mono 6
Yu.ZPCH-270
142
710
55, 0
NPam Mono 65 (270)
NPam Mono 6
PPC-240
120
670
53, 0
NPam Mono 51, 3 (240)
NPam Mono 51
12PCH-240
133
600
51, 0
NPam Mono 51, 5 (240)
NPam Mono 5
12.5Ch-240
135
560
50, 0
NPam Mono 51, 3 (240")
NPam Mono 5
13.3Ch-240
148
512
46, 3
NPam Mono 51, 6 (240)
NPam Mono 5
14PCH-20O
111
500
49, 5 .
NPam Mono 35, 7 (200)
NPam Mono 3
14Ch-240
151
474
43, 8
NPam Mono 51, 6 (240)
NPam Mono 5
15.5Ch-200
122
450
48, 0
NPam Mono 35, 7 (200)
NPam Mono 3
16PCH-200
127
425
46, 25
Same
Same
17.5Ch-180
111
390
47, 0
NPam Mono 28, 9 (180)
NPam Mono 2
18, 5Ch-180
116
363
47, 25
Same
Same
19.5Ch-150
90
355
47, 5
NPam Mono 20 (150)
NPam Mono
20, 2PCH-150
91
335
46, 0
Same
Same
2SchCh-150
93
315
44, 0
»
»
22.7Ch-150
98, 4
300
46, 5
»
»
24.7Ch-150
109
265
43, 0
>
»
27PCH-120
74
250
46, 0
NPam Mono 12, 8 (120)
NPam Mono 1
27PA-120
73
250
46, 0
NPam Mono 12, 9 (120)
NPam Mono 1
29PA-120
.80
224
42, 5
Same
Same
29PC-120
79
224
42, 5
NPam Mono 12, 8 (120)
NPam Mono 1
ZOPA-120
82
212
41, 0
NPam Mono 12, 9 (120)
NPam Mono 12
ZOPCH-120
82
212
41, 0
NPam Mono 12, 8 (120)
NPam Mono 1

The name of the raw material and the nominal linear p
Conditional
Over-
Nominal
Coeffi-
threads, tex (diameter, mk)
designation
density,
size
alive
sieve cloth
(vendor code)
g / m 2, not
holes,
section,
less
micron
.0
basics
duck
33/36 PA
47
220
47, 5
NPam Mono 6, 7 (86)/ /NPam Mono 3, 3 (60)
NPam Mono 6
36/40PA
49
180
46, 0
Same
NPam Mono 5
43PA-70
40
163
49, 0
NPam Mono 4, 4 (70)
NPam Mono 4
41/43PA
48
160
45, 5
NPam Mono 5, 7 (80)/ /NPam Mono 2, 2 (50)
NPam Mono 5
46PA-60
30
157
52, 3
NPam Mono 3, 3 (60)
NPam Mono 3
42/48PA"
38
150
45, 5
NPam Mono 5, 7 (80)/ /NPam Mono 2, 2 (50)
NPam Mono 3
49PA-60
31
144
49, 7
NPam Mono 3, 3 (60)
Same
52PA-50
22
142
54, 6
NPam Mono 2, 2 (50)
"NPam Mono 2
45/50PA
38
140
44, 5
NPam Mono 4, 4 (71)/ /NPam Mono 2, 2 (50)
NPam Mono 3
49/52"PA
35
132
44, 25
NPam Mono 3, 3 (60)/ /NPam Mono 1, 7 (43)
Same
55PA-5!)
24
130
52, 5
NPam Mono 2, 2 (50)
NPam Mono 2
58PA-50
26
122
47, 5
Same
Same
52/60PA
30
118
43, 5
NPam Mono 3, 3 (60)/ /NPam Mono 1, 7 (43)
Same
61PA-50
26
114
48, 3
NPam Mono 2, 2 (50)
NPam Mono
54/62PA
31
112
41, 75
NPam Mono 3, 3 (60)/ /NPam Mono 1, 7 (43)
Same
56/64PA
34
106
40, 25
Same
Same
64PA-50
28
106
46, 2
NPam Mono 2, 2 (50)
Same
58/67CA
35
100
38, 5
NPam Mono 3, 3 (60/ /NPam Mono 1, 7 (43)
NPam Mono
67PA-50
28
99
44, 0
"NPam Mono 2, 2 (50)
Same
G.1/69PA
33
95
38, 0
NPam Mono 2, 2 (50)/ /NPam Mono 1, 7 (50)
NPam Mono

Name of raw material and nominal linear area
Remote designation
superficial
density,
Nominal size
live coefficient
threads, tex
(diameter, mk)
sieve cloth
(vendor code)
g/m a, not
holes,
section,
less
micron
%
basics
duck
70PA-50
31
93
42, 3
NPam Mono 2, 2 (50)
NPam Mono 2,
71PA-50
31
93
42, 3
Same
Same
73PA-50
30
87
40, 0
»
»
76PA-50
32
82
39, 0
>
>
78PA-50
36
78
37, 1
>
»
81PA-50
37
74
35, 6
»
»
87PA-43
30
72
39, 2
NPam Mono 1, 7 (43)
NPam Mono 1, 7
84PA-43
31
70
39, 0
Same
Same
90PA-43,
30
67
36, 4
»
>
100PA-43
30
56
31, 4
»
>
120PA-37
32
46
30, 9
NPam Mono 1, 2 (37)
NPam Mono 1, 2
140PA-37
35
37
27, 0
Same
Same
160PA-35
37
29
22, 0
NPam Mono 1, 1 (35)
NPam Mono 1,
180PA-30
32
26
21, 9
NPam Mono 0.8 (30)
NPam Mono 0.8
38PE-90
72
173
40, 9
NPefMono 11, 1 (90)
NPefMono 11
45PE-80
68
142
40, 9
NPef Mono 6, 7 (80)
NPef Mono 6, 7
76PE-55
54
84
40, 5
NPef Mono 3, 3 (55)
NPef Mono 3, 3
90PE-48
50
62
38, 4
NPef Mono 2, 5 (48)
NPef Mono 2, 5
100PE-40
36
57
32, 5
NPef Mono 1, 7 (40)
NPef Mono 1, 7
120PE-4O
40
46
30, 6
NPef 1, 7 (40)
NPef 1, 7 (40)
140PE-34
38
35
24, 0
NPef 1, 3 (34)
NPef 1, 3 (34)
Note. In the designation of the name of the raw material, the letters mean: polyamide thread; NPef - polyester thread.
NK

GOST 4403-91 S. 21

1. DESIGNED And INTRODUCED by the State Committee for Light Industry under the State Planning Committee of the USSR
DEVELOPERS
L. I. Gandurin, R. A. Printseva (theme leader); T. V. Lo-mokhova
2. APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Product Quality Management and Standards dated June 27, 1991 No. 1109
3. The term of the first inspection - 1997. The frequency of inspection - 5 years
4. REPLACE GOST 4403-77, OST 17-46-82
5. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS
The designation of the NTD to which the link is given
Item number
GOST 3811-^72
3.3
GOST 3813-72
3.5
GOST 5618-80
1.2.2
GOST 7000-80
1.4.4, 4.1
GOST 14067-75
3.4
GOST 14192-77
1.4.4
GOST 20566-75
3.1
GOST 25506-82
1.3.4.2
GOST 27244-87

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