Some standard content:
GB/T2660—1999
This standard is a revision of GB/T2660-1989. In terms of technical content, this standard adopts the Japanese Industrial Standard JISL4117-1980 "Shirts" in a non-equivalent manner, and is coordinated with GB/T1335.1~1335.2-1997 "Clothing Sizes" and GB/T2667--1993 "Specifications for Men's and Women's Shirts".
This revised version has made clear technical regulations for "warp and weft yarns" according to superior products, first-class products and qualified products; some indicators of the "stripes and grids" parts of shirts have been adjusted more strictly; the original standard stipulates that first-class products and qualified products can be spliced, and the quality requirement that the whole product cannot be spliced has been clarified; the original standard's part division diagram and the degree of defects allowed in each part have been adjusted and supplemented; the "shrinkage rate index of the main parts of the finished product has been enriched, and the assessment of fabrics such as pure cotton and silk has been added. The superior product index is the same as the Japanese Industrial Standard JISI4117; the "stitch length" has been adjusted. After the adjustment, the stitch length density of flat seams and lock seams (overlock seams) is the same as that of Japanese Industrial Standard JISI4117. The Japanese standard is the same; the measurement method of the length of round-hem shirts has been added, and the measurement method of the shoulder width of men's shirts has been adjusted; the method and assessment indicators for detecting "paper cracks at the seams of the main parts of the finished product" have been added, and the test item of "strength of the seams" has been deleted and modified; the detection requirements and assessment indicators for the free formaldehyde content of finished shirts have been added; the grading rules for finished product inspection and the rules for determining single and batch finished products have been added, and the basis for determining shirt quality defects has been compiled into this standard in the form of a table, and Appendix A has been added. The test method for the degree of seam detachment is clear and specific, and is easy to operate and follow. Appendix A of this standard is the appendix to the standard.
This standard is proposed by the State Administration of Textile Industry. This The standard is under the jurisdiction of the National Technical Committee for Standardization of Clothing. This standard was drafted by the National Clothing Quality Supervision and Inspection Center (Tianjin); Guangdong Textile Product Quality Supervision, Inspection and Testing Center, Jiangsu Sanyou Group Co., Ltd., Wuxi Guangming Underwear Factory, Ningbo Youngor Garment Co., Ltd. participated in the drafting. The main drafters of this standard are: Liu Jiadong, Wang Shurong, Shen Yongyan, Yang Haiyan. 219
National Standard of the People's Republic of China
Shirts
GB/T2660--1999
Replaces GB/T2660--1989
This standard specifies the size, specifications, raw materials, All technical characteristics such as inspection methods, grading rules, etc. This standard applies to men's and women's shirts and cotton shirts produced in batches with textile fabrics (non-knitted) as raw materials, and also applies to shirt-type fashion products.
2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB250--1995 Gray sample card for evaluating color change (idtISO105/A02:1993) GB/T1335.1—1997 Clothing sizes for men GB/T1335.2--1997 Clothing sizes for women GB/T2667~-1993 Specifications for men's and women's shirts
GB/T2912.1-1998 Determination of formaldehyde in textiles - Part 1: Free and hydrolyzed formaldehyde (water extraction method) GB5296.4-1998 Instructions for use of consumer products Instructions for use of textiles and clothing GB6529-1986 Standard atmosphere for conditioning and testing of textiles (negISO139:1973) GB/T8629-1988 Household washing and drying procedures for testing textiles (neqISO6330:1984) FZ/T80002---1991 Clothing marking, packaging, transportation and storage 3 Requirements
3.1 Size specifications
3.1.1 Size setting shall be selected in accordance with the provisions of GB/T1335.1 and GB/T1335.2. 3.1.2 The specifications of the main parts of the finished product shall comply with the provisions of GB/T2667 or be designed according to the relevant provisions of GB/T1335. 3.2 Raw material regulations
3.2.1 Fabric: Select fabric suitable for shirts according to the relevant textile fabric standards. 3.2.2 Lining: Use lining that is compatible with the performance and color of the fabric. 3.2.3 Accessories
3.2.3.1 Interlining: Use interlining that is suitable for the fabric, and its shrinkage rate should be compatible with the fabric. 3.2.3.2 Sewing thread: Select sewing thread that is suitable for the quality of the fabric used, and the color difference is allowed to be negative half a level and positive 1 level (printing, stripes, and yarn-dyed materials should be based on the main color, with the exception of decorative lines), and the button thread should be compatible with the color of the button. 3.2.3.3 Buttons: The thickness and color are appropriate, without defects, and will not change color or deform due to washing and ironing. 3.2.3.4 The trademark thread should be compatible with the trademark base color. 3.2.4 Filling material: The quality should meet the requirements of its product standards, and the shrinkage rate should be appropriate to the fabric. 3.3 Technical regulations on warp and weft yarns
Approved by the State Administration of Quality and Technical Supervision on June 24, 1999 220
Implementation on January 1, 2000
GB/T 2660—1999
3.3.1 The front body (not allowed to be warped) is warped, and the degree of slant allowed for the back body and sleeves shall be as specified in Table 1. Table 1
3.4 Regulations on stripes and grids
Superior products
3.4.1 For fabrics with obvious stripes and grids of more than 1.0 cm, follow the provisions of Table 2. 3.4.2 For materials with reversed and straight velvet, the whole body is consistent in the straight direction. 3.4.3 Special patterns shall be based on the main picture, and the whole body is consistent in the straight direction. Table 2
Part Name
Left and right front
Pocket and front
Double pockets of bias material
Left and right collar
Back shoulder
3.5 Splicing
Regulations on stripe and grid
The stripe and grid of the center (collar eye, button) have a difference of no more than 0.3
The stripe and grid have a symmetric difference of no more than 0.2. The stripe and grid are symmetrical, and the difference is no more than 0.2
The stripe and grid are symmetrical, and the difference is no more than 0.2
The stripe and grid of the left and right sleeves are straight, symmetrical with straight stripes, and the difference is no more than 0. 2
Stripes are straight, with the difference between the two ends not exceeding 0.4. Stripes are straight, with the sleeve cap as the standard, the two sleeves are symmetrical, and the difference is not greater than 1.0.
Stripes are straight, with the cuffs as the standard, the two sleeves are symmetrical, and the difference is not greater than 0.5.
The whole product is not allowed to be spliced. Except for decorative splicing. 3.6 Color difference tolerance
3.6.1 The color difference between the collar, shoulder, pocket, sleeve head and the body is higher than 4 levels. 3.6.2 The color difference of other parts is 4 levels.
3.6.3 The color difference caused by the lining or multi-layer material is not less than 3-4 levels. 3.7 Provisions for appearance defects
First-class products
Qualified products
Grid sizes are inconsistent, with the upper one-third of the front body as the standardGrid sizes are inconsistent, with the center of the front of the bag as the standard, with obvious stripes as the main standard (except for Yin-Yang grid)bzxz.net
Yin-Yang stripes are mainly grids with obvious stripes
Mainly obvious stripes
Grids below 3.0 are not aligned horizontally, and strips below 1.5 are not aligned horizontally2.0 grids are not aligned horizontally, and strips below 1.5 are not aligned horizontallyDefects in various parts shall be as specified in Table 3, and the division of finished product parts is shown in Figure 1. Defects not listed in this standard shall be handled according to their shapes and refer to similar defects in Table 3.
Defect name
Thicker than twice
2 yarns
0 position
Allowed existence degree of each position
1 position
Length less than 3.0
2 position
No influence on appearance
3 position
Unlimited length
Sample card serial number
Defect name
Thicker than twice
3 yarns
Thicker than three times
4 yarns
Double warp and double weft
Small jump flower
Uneven weft density
Granular yarn
Warp shrinkage ripple
Broken warp and broken weft 1 Root
Light oil yarn
Light micro-stains (stains)
3.8 Physical and chemical performance requirements
0 Part
The physical and chemical performance indicators of the finished product shall be in accordance with the following provisions. GB/T 2660—1999
Table 3 (end)
Allowed existence degree of each part
1 Part
Length less than 1.5
Length less than 1.5
3.8.1 The shrinkage rate indicators of the main parts of the finished product shall be in accordance with the provisions of Table 4. Table 4
Part name
Superior products
The wrinkle difference indicators of the main parts of the finished product shall be in accordance with the provisions of Table 5. 3.8.2
2 parts
Length less than 4.0
Length less than 2.5
Does not affect the appearance
Length 4, width less than 1.0
Not obvious
Length 2.5 or less
(0.2×0.2)cm2 or less
First-class products
3 parts
Length 6.0 or less
Length 4.0 or less
Length unlimited
Does not affect the appearance
Not obvious
Does not affect the appearance
Length 4.0 or less
Does not affect the appearance
Does not affect the appearance
Sample card number
Qualified products
Part name
Wrinkle level difference before washing
GB/T 2660----1999
Superior products
Wrinkle level difference after washing
First-class products
Qualified products
Note: When the raw materials are pure cotton, pure wool, linen, and cotton and linen blends, after washing, it is only allowed to reduce the value specified in Table 5 by 0.5 levels. Products made of silk are not subject to the wrinkle index after washing.
3.8.3 The degree of paper tear at the seam of the main part of the finished product is ≤0.5cm for superior products, ≤0.6cm for first-class products and qualified products. 3.8.4 The formaldehyde content released by the finished shirt is ≤100mg/kg. 3.9 Sewing regulations
The needle spacing density shall be as specified in Table 6.
Overlock
Needle density
3cm not less than 14 (general shirt)
: 3cm not less than 11 (cotton village shirt)
3 cm not less than 12
1 cm not less than 15
No less than 6 threads per eye
The sewing lines of each part are neat, firm and flat. The upper and lower threads are of appropriate tightness, without skipped threads or broken threads, and there should be backstitches at the starting and falling needles. Preparation
Including hidden threads
Including lockstitch (chain stitch)
No skipped stitches or connection are allowed in the 0 part, and no single skipped stitches are allowed within 30cm of other parts (chain stitches do not allow skipped stitches). The collar is flat, the collar surface is of appropriate tightness, and it does not warp, bubble or seep glue. The stitching parts of the sleeves, sleeve heads, pockets and garment pieces are hooked, flat and not skewed. The trademark is positioned correctly, and the size mark is clear and correct. The buttonhole is positioned accurately, and one end of the seal is turned up and down more than four times without any thread fraying. The buttonhole is opposite to the buttonhole, and the thread volume should meet the requirements of Table 6. The limit deviation of the specifications of the main parts of the finished product shall be in accordance with the requirements of Table 7. Table 7
Part name
Long sleeve length
Short sleeve length
3.10 Ironing appearance
General shirt
Cotton shirt
3.10.1 The finished product is ironed flat and neat inside and outside. GB/T 2660-1999
3.10.2 The collar shape is basically the same on the left and right, and the folding is straight and flat. 3.10.3 The ironing and folding specifications of the batch of products should be consistent. 3.11 Product instructions
The instructions for the use of the product shall be in accordance with the provisions of GB5296.4. 4 Inspection (test) methods
4.1 Determination of finished product specifications
4.1.1 Specifications of the main parts of the finished product shall be in accordance with 3.1.2 of this standard. 4.1.2 The measurement method of specifications of the main parts of the finished product shall be in accordance with Table 8 and Figure 2 of this standard, and the allowable deviation shall be in accordance with Table 7 of this standard. Table 8
Part name
Long sleeve length
Short sleeve length
Measurement method
Measure horizontally with the collar flat, measure the upper edge for a stand-up collar, and measure the lower edge for other collars.Men's shirt: align the bottom edges of the front and back body, and measure vertically from the highest point of the collar side to the bottom edge.Women's shirt: measure vertically from the highest point of the front shoulder seam to the bottom edge.Hem: measure vertically from the middle point of the back collar nest to the bottom edge.Measure from the highest point of the sleeve to the edge of the sleeve head
Measure from the highest point of the sleeve to the edge of the cuff
Button up, lay the front and back body flat (fold and pull apart at the back), and measure horizontally at the bottom seam of the sleeve (calculated by circumference).Men's shirt: measure horizontally from the two ends of the shoulder and 2.0 cm to 2.5 cm below the back collar nest.Women's shirt: measure horizontally from the intersection of the shoulder seam, unbutton and lay flat.
4.2 Determination of quality level of main properties of finished products
GB/T 2660—-1999
4.2.1 Finished product shrinkage and finished product wrinkling Washing method: According to GB/T8629, randomly select 3 finished products from the batch for testing. The results are averaged from the 3 pieces and compared with Table 4 and Table 5 of this standard. 4.2.1.1 Humidity conditioning: The sample and the weighted test fabric are conditioned according to GB6529. 4.2.1.2 Detergent: High-efficiency low-foaming neutral detergent. 4.2.1.3 Equipment: According to 3.1 of GB/T8629--1988, or use a fabric shrinkage test machine or a household washing machine (try to choose the same conditions as 3.1 of GB/T8629-1988). 4.2.1.4 Washing procedure: According to Chapter 5 of GB/T8629-1988, use 1A~~9A and simulated hand washing for washing according to different fabrics.
4.2.1.5 Drying method: According to the A method in 6.1 or the F method in 6.6 of GB/T8629--1988. 4.2.1.6 Calculation and result expression
Change rate of size of each part (%) Before washing, try to choose the size after washing × 100 Size before washing
4.2.1.7 Appearance evaluation after washing
Put the dried clothing according to the requirements of appearance measurement, visually check whether the collar surface is bubbling and degumming, and compare the wrinkling degree of the seam with the sample, and record the results.
4.2.2 The degree of detachment of the seam of the main part of the finished product is tested according to the test method specified in Appendix A of this standard, and 3 finished products are randomly selected from the batch for testing. The average value of the 3 pieces is taken as the result and compared with 3.8.3 of this standard. The sample requirements and sampling locations are as follows: 4.2.2.1 Sample size 5.0cm×20.0cm (including the clamping part). 4.2.2.2 If the sample is cut from the finished garment, it can be in accordance with the requirements of Table 9. Table 9
Test location
Sleeve seam
Shoulder seam
Sampling location regulations
The half of the hem length is the sample center. The back sleeve is bent. The cross of the sleeve bottom is 5.0cm behind the cross. The half of the sleeve length is 4.0cm above the top. The third of the shoulder seam is the sample center
Note: The yarn direction of the sample is perpendicular to the sampling location. 4.2.3 The formaldehyde content released by the finished shirt shall be determined in accordance with GB/T2912.1. 4.3 Sewing quality determination
4.3.1 Sewing shall be in accordance with the provisions of 3.9 of this standard.
4.3.2 Stitch length determination shall be in accordance with the provisions of Table 6 of this standard. Take any 3cm (except the thick and thin parts) on the finished product for measurement. 4.3.3 Calculation method of weft skew
4.4 Appearance determination
Weft yarn (grid) tilt and maximum horizontal distance × 100 Weft slope (%) -
Width of garment
Not considered for short sleeves
(2)
4.4.1 When determining the degree of color difference, the measured part must be in the same direction, the line of sight is at a 45° angle to the measured object, and the distance is 60cm for visual inspection. According to the provisions of 3.6 of this standard, compare with the GB250 sample card.
4.4.2 When determining appearance defects, the arrow on the sample card must be in the direction of the light, and the defect sample photo must be measured according to the provisions of 3.7 of this standard. 5 Inspection tools
5.1 Steel tape measure.
5.2 Grey sample card for evaluating discoloration (GB250). 225
5.3 Sample photo of appearance defects of shirts.
6 Inspection classification rules
6.1 Inspection classification
The inspection of finished products is divided into factory inspection and type inspection. GB/T 2660--1999
6.1.1 Factory inspection shall be in accordance with the relevant provisions of Chapter 3 of this standard, excluding the content of 3.8. 6.1.2 Type inspection shall be in accordance with the provisions of Chapter 3 of this standard. 6.2 Grade classification rules
The finished product grade classification is based on the existence of defects and the severity of the defects; the single product in the sample is graded according to the number of defects and the severity of the defects; the batch grade is divided according to the number of single products in the sample. 6.2.1 Defects
A single product that does not meet the technical requirements specified in this standard constitutes a defect. According to the degree of non-compliance of the product with the standard and the impact on the product's performance and appearance, defects are divided into three categories: a) Serious defects
Defects that seriously reduce the product's performance and seriously affect the product's appearance are called serious defects. b) Major defects
Defects that do not seriously reduce the performance of the product or seriously affect the appearance of the product, but are more serious than those specified in the standard, are called major defects. c) Minor defects
Defects that do not meet the requirements of the standard but have little impact on the performance and appearance of the product, are called minor defects. 6.2.2 The basis for judging the quality defects of shirts is shown in Table 10. Table 10
Appearance quality
Color difference and color fastness
Minor defects
The trademark is not straight and obviously skewed; the trademark nailing line is not suitable for the trademark background color
The collar is inconsistent on the left and right, the folding is not straight, and the difference is 0.More than 6cm (comparison between the two shoulders and the inner placket); the collar and placket are slightly raised and not straight, the bottom collar is exposed, the chest pocket and sleeves are not straight and straight
Ironing is not straight; there is a bright light
Major defects
Serious defects
No factory name or address; no number
The mother pattern mark is inaccurate; no pattern mark; no component mark
The collar and placket are seriously raised
Slightly yellowed and discolored by ironing
The surface has a dead thread head of 1.0cm long and a yarn hair of 1.5cm long, 2 There are obvious stains, the stains are > roots or more; there are slight stains, the stains are ≤2.0cm2, and the splashes are ≤4cm
The collar is not straight, the collar surface is not tight enough: the surface of the notch overlaps The color difference of parts does not meet the requirements of this standard within 1 level; the color difference of the lining cloth is lower than 3 levels
The color tone of the sewing thread is not compatible with the fabric; the button thread and the button color are not compatible
2., 3 parts exceed the requirements of this standard
2.0cm2, splash>4.0
Collar surface blistering, glue seepage, collar
tip warping
Surface color difference exceeds
1 level specified in this standard
0, 1 parts exceed the requirements of this standard
mark, no washing mark; no
certificate
deterioration, damage
0 parts blistering
matching stripes and grids
sewing quality
GB/T 2660-1999
Table 10 (continued)
Minor defects
The stripe, grid and weft skew exceed the specified indicators of this standard by less than 50%
Below the specified indicators of this standard Within 2 needles (including 2 needles) Specifications exceed the specified indicators of this standard by less than 50%
The difference between buttonhole spacing is ≥0.5cm; skew ≥0.3cm, yarn frayed
The difference between buttonhole and eye position is ≥0.4 cm; the button is not firmly nailed The sewing line is not straight; the width is uneven, not flat, and the connection point is obviously double track 1.0 cm, no backstitch at the starting and ending needles, hair leakage ≤2.0cm, single skipped stitch at two places within 30cm; upper and lower lines are slightly elastic and inappropriate
collar stop is not straight; reversed, collar tip length is inconsistent, with a difference of 0.3cm~0.5cm, collar is not flat; collar is skewed 0.6cm~~0.9cm
collar pressure line: inconsistent width, lower kang; reverse line distance>0.4cm or upper kang
pan head: protruding 0.3cm; stop reversed, uneven door, inner placket is not straight, length differs by 0.4cm~0.6cmz sleeve length differs by 0.6cm~0.8cm
needle eye exposed
pockets are skewed, uneven, stitching is obviously wide or narrow, left and right pockets are higher>0.4cm; front and back>0.6 cm
Embroidery: uneven stitches, slight missing marks Sleeves: asymmetrical stop on the left and right; width>0.3cm, length>0.6cm
Pleats: difference>0.8cm, uneven, asymmetrical slit length>0.5cm
Sleeves: not round and smooth; uneven hooking; uneven sleeves Heavy defects
For stripes and grids, the weft skew exceeds
the indicators specified in this standard by more than 50%; the forward direction is not
consistent, and the forward direction of special patterns is
lower than the requirements of this standard by more than 2
stitches.
Specifications exceed the requirements of this standard by more than 50%
Jumping, open thread, hair leakage
Button drop
Hair leakage ≥2.0cm, upper
lower thread tightness is seriously inappropriate
, affecting the fastness of chain
line jumper, broken thread
collar tip length difference>0.5
cm; gauze collar skew ≥1.0
cm; collar is seriously uneven
clothing; there are wiring, jump
doors, and the length difference of the inner placket is ≥
0. 7 cm; The difference between the length of the two sleeves is ≥ 0.9 cm. The nail holes are exposed. Serious missing marks; The embroidery is not serious. The indicators specified in this standard are exceeded by more than 100%. The collar tip is exposed. Sewing quality GB/T 2660—1999
Table 10 (Complete)
Minor defects
Splicing: beyond the provisions of this standard
Cross seam: difference > 0.5cm
Major defects
Sleeve flower splicing
Shoulder, sleeve bulge, sleeve continuation, side seam, seam are uneven; the balance is inconsistent; the difference between the two shoulders is > 0.8; the difference between the two shoulders is > 0.4cm
Dart: not straight; the tip is bulging; the length is short; the front and back are not consistent, the difference is ≥ 1.0cm
Bottom: width is not consistent; not straight; slight warping1 The above defects are calculated cumulatively by serial number. cm
Serious warping
2 Defects not covered by this rule can be judged according to the provisions of the standard and refer to Table 10 for similar defects. 3 Any missing chips, missing or wrong order are serious defects. Missing parts are serious defects. 4 Physical and chemical performance test 3.8.3 If one item is unqualified, it is a serious defect of the sampling batch. If other items are unqualified, it is an unqualified sampling batch. 6.3 Sampling rules
Sampling quantity is based on product batch:
10 pieces are sampled for less than 500 pieces (including 500 pieces). 20 pieces are sampled for more than 500 pieces to 1000 pieces (including 1000 pieces). 30 pieces are sampled for more than 1000 pieces.
6.4 Judgment rules
6.4.1 Single piece (sample) judgment
Superior products: number of serious defects = 0 number of serious defects minus 0 number of minor defects ≤ 3 First-class products: number of serious defects = 0 number of serious defects minus 0 number of minor defects ≤ 5 Qualified products: number of serious defects = 0 number of serious defects = 0 number of minor defects ≤ 8 or number of serious defects = 0 number of serious defects ≤ 1 number of minor defects ≤ 46.4.2 Batch judgment
Serious defects
Collar splicing
Superior product batch: the number of superior products in the sample ≥ 90%, the number of first-class products and qualified products 10% (excluding unqualified products). First-class product batch: the number of first-class products and above in the sample ≥ 90%, the number of qualified products ≤ 10% (excluding unqualified products). Qualified product batch: the number of qualified products and above in the sample ≥ 90%, the number of unqualified products ≤ 10% (excluding serious defects). 6.4.3 The number of each batch determined in the random inspection meets the standard requirements and the qualified grade batch is shipped out of the factory. 6.4.4 If the number of each batch determined in the random inspection does not meet the standard requirements, a second random inspection shall be carried out. The number of random inspections shall be doubled. If it still does not meet the standard requirements, all shall be repaired or downgraded. 7 Marking, packaging, transportation, labeling and storage
Marking, packaging, transportation and storage shall be carried out in accordance with FZ/T80002. 228
A1 Principle
GB/T 2660-1999
Appendix A
(Appendix to the standard)
Test method for the degree of seam disengagement
Apply a certain load in the direction perpendicular to the fabric seam, the seam disengages, and the maximum distance of its disengagement is measured. A2 Load applied
The load is 120N±5N.
A3 Equipment and Materials
A3.1 For ordinary household and industrial sewing machines, the sewing needles shall be of the type suitable for the fabrics used. A3.2 For sewing threads, the sewing threads shall be suitable for the quality of the fabrics used. A3.3 For fabric strength testers, the distance between the upper and lower clamps is 10.0 cm, the lower clamp descends at a speed of 5.0 cm/min when there is no load, and the pre-tension weight is 2 N.
A4 Standard atmosphere
Standard atmosphere for humidity adjustment and testing, with a temperature of 20℃±2℃ and a relative humidity of 60% to 70%. A5 Specimen requirements and preparation
A5.1 The specimen size shall be in accordance with the provisions of 4.2.2.1. If it is cut from the fabric, it shall be 5.0 cm×30.0 cm, and its edges shall be parallel to the warp and weft threads. A5.2 The number of specimens (if cut from the fabric) shall be three pieces each for the warp and weft. A5.3 Fold the cut specimen in half so that the short sides overlap, sew it with a sewing machine at a position 1.3 cm parallel to the crease, and tie the suture firmly. Finally, open the specimen along the suture. A6 Test steps
A6.1 Separate the two clamps of the strength machine to 10.0 cm. The edges of the two clamps must be parallel to each other and perpendicular to the moving direction. A6.2 Fix the specimen in the middle of the clamp (first hang a 2N preload clamp on the lower end of the specimen, and then tighten the lower clamp) so that the seam and the edge of the clamp are parallel to each other.
A6.3 5.When the load is gradually increased to 120N±5N at a speed of 0cm/min, stop the lower clamp from descending, and then measure the maximum distance of the seam disengagement vertically on the strength machine. See Figure A1. 229
GB/T 2660--1999
Seam line
Measurement of seam disengagement width
Widest distance
Calculate the average value of the maximum distance of the seam disengagement of three specimens in the warp and weft directions or five specimens of the finished product, in centimeters (accurate to 0.05cm).
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