Some standard content:
GB/T2666—2001
This standard is a revision of GB/T2666-1993 "Men's and Women's Western-style Trousers". In the revision of this standard, the Japanese T-shirt Standard JISL4208-1992 "Finished Men's Western-style Suit" was adopted by reference. This revision will expand the scope of application to woolen clothing such as men's and women's western-style trousers and skirts, cancel the 5.3 series and other contents, add the main contents such as the limit of formaldehyde content, color fastness regulations, pilling regulations, composition and content regulations, and supplement the contents of defect determination. Other technical contents have also been greatly changed. Appendix A of this standard "Test method for the degree of seam disengagement" partially adopts the provisions of FZ/T20019-1999 "Test method for the degree of seam disengagement of wool woven fabrics".
Appendix A and Appendix B of this standard are appendices to the standard. This standard shall be implemented from February 1, 2002. From the date of implementation, this standard will also replace GB/T2666-1993. This standard was proposed by the former State Textile Industry Bureau. This standard is under the jurisdiction of the National Technical Committee for Clothing Standardization. This standard was drafted by Shanghai Garment Research Institute, National Garment Quality Supervision and Inspection Center (Shanghai), Beijing Garment Quality Supervision and Inspection Station 1, Wenzhou Quality and Technical Supervision and Inspection Institute, and participated in the drafting by Shanshan Co., Ltd., Baoxiniao Group Co., Ltd., Fapai Fashion Design Institute, Ningbo Romon Group, Jiangsu Dacang Group and other units. The main drafters of this standard are: Xu Jian, Xu Yunbao, Jiang Yanxiang, Le Jizhun, Lin Owen, Lin Yuemei, and Lu Huiping. 27.1
1 Scope
National Standard of the People's Republic of China
Men's and Women's Trousers
Women and men's trousers
GB/T 2666--2001
Replaces GB/T2666--1993
This standard specifies the requirements, inspection (test) methods, inspection classification rules, and all technical characteristics such as marking, packaging, transportation and storage for men's and women's trousers and skirts.
This standard is applicable to woolen garments such as men's and women's trousers and skirts produced in batches using wool, wool blended, wool-type chemical fiber and other fabrics as raw materials.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB250-1995 Grey scale for assessing change in colour GB2511995 Grey scale for assessing staining
GB/T 1335.1-—1997
GB/T 1335.2-—1997
GB/T 2910—1997
GB/T 2911—1997
Clothing sizes for men
Clothing sizes for women
Quantitative chemical analysis methods for textiles-Methods for quantitative chemical analysis of two-component fibre blends Textiles-Methods for quantitative chemical analysis of three-component fibre blends GB/T 2912.1—1998
Textiles-Determination of formaldehyde-Part 1: Free and hydrolyzed formaldehyde (water extraction method) GB/T 3920—1997
Textiles: Tests for colour fastness Colour fastness to rubbing Textiles: Tests for pilling of fabrics: Circular locus method
CB/T4802.1—1997
GB 5296. 4--1998
Instructions for use of consumer products Instructions for use of textiles and clothing GB/T 5711--1997
Textiles: Tests for colour fastness Colour fastness to dry cleaning FZ/T 20019—1999
Test method for seam unraveling degree of wool woven fabrics FZ/T24002--1993 Combed wool fabrics
FZ/T24003-1993 Combed wool fabrics
FZ/T24004—1993 Combed low-wool blended and purified wool fabrics FZ/T24008-1998 Combed high-count and thin wool fabrics FZ/T80002-1991 Clothing marking, packaging, transportation and storage FZ/T80007.3—1999 Test method for dry cleaning resistance of clothing using adhesive interlining 3 Requirements
3.1 Instructions for use
Instructions for use shall be in accordance with the provisions of GB5296.4. 3.2 Model Specifications
Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on August 28, 2001, implemented on February 1, 2002
GB/T 2666—2001
3.2.1 Model settings shall be selected in accordance with the provisions of GB/T1335.11335.2. 3.2.2 Specifications of the main parts of the finished product shall be designed by the relevant provisions of GB/T1335.1~1335.2. 3.3 Raw Material Specifications
3.3.1 Fabrics
Selected in accordance with FZ/T24002, FZ/T24003, FZ/T24004, FZ/T24008 or relevant textile fabric standards. 3.3.2 Lining
Use linings that are suitable for the performance and color of the fabrics used, except for special needs. 3.3.3 Accessories
3.3.3.1 Lining
Use lining suitable for the fabric used, and its shrinkage should be suitable for the fabric. 3.3.3.2 Sewing
Use sewing suitable for the surface and lining materials used. The button thread should be suitable for the color of the button; the trademark thread should be suitable for the trademark base color (except for the decorative thread).
3.3.3.3 Buttons and accessories
Use buttons (except for decorative threads) and accessories suitable for the fabric used. Buttons and accessories should be rust-free, smooth and durable, and will not deform or change color after washing and ironing.
3.4 Technical regulations for warp and weft yarns
3.4.1 Precursor: The warp yarn shall be based on the ironing line, and the inclination shall not exceed 1.0cm. Striped materials are not allowed to be inclined. 3.4.2 Back body: The warp yarn shall be based on the ironing seam, and the left and right inclination shall not exceed 1.5cm. The inclination of striped and checked materials shall not exceed 1.0cm. 3.4.3 Waistband: The warp yarn inclination shall not exceed 1.0cm. The inclination of striped and checked materials shall not exceed 0.3cm. 3.4.4 The weft inclination of yarn-dyed checked materials shall not exceed 3%.
3.5 Rules for stripes and checkers
3.5.1 Fabrics with obvious stripes and checkers of 1.0cm or more shall comply with the provisions of Table 1. Table 1
Front and rear crotch seams
Pocket cover and body
Rules for stripes and checkers
Checkers shall be aligned horizontally at 10 cm below the side seam pocket opening, and the difference shall not exceed 0.3cm. The stripes and checkers shall be symmetrical, and the checkers shall be aligned horizontally, and the difference shall not exceed 0.3cm. The stripes and checkers shall be aligned horizontally, and the difference shall not exceed 0.3cm. Note: Special designs are not subject to this restriction.
3.5.2 For materials with reverse and straight hair and yin-yang pattern, the whole body should be in the same direction (for materials with long hair, the whole body should be in the same direction). 3.5.3 For fabrics with special patterns, the main picture shall prevail, and the whole body should be in the same direction. 3.6 Splicing regulations
The waistband surface and lining are allowed to be spliced at one place, and the men's trousers are spliced at the back seam, and the women's trousers are spliced at the back seam or side seam. 3.7 Color difference regulations
The color difference between the crotch seam, waistband and the main body shall not be less than level 4, and other surface parts shall be higher than level 4. The color difference between the top and trousers in the suit shall not be less than level 4.
3.8 Appearance defect regulations
The degree of defects allowed in each part of the finished product shall be as specified in Table 2. The division of each part of the finished product is shown in Figure 1. Only one defect is allowed in each independent part. Defects not listed in this standard shall be implemented according to their form and refer to similar defects in Table 2. 276
Defect Name
Coarser than twice coarse yarn
Big belly yarn (three pieces)
Nipples (pieces)
Stripe (crease)
(Oil, rust, color spot)
3.9 Sewing regulations
No. 1 part
GB/T 2666 --- 2001
Allowed degree of existence in each part
No. 2 part
0.5~1.5cm
Not allowed
Not allowed
Not allowed
3.9.1 Stitch density shall be as specified in Table 3.
Light and dark thread
Overlock thread
Handmade needle
Triangular needle
Needle density
3 cm 12~14 needles
1.5~～3.0 cm
1.0~2.0 cm
1. 0~~2. 0 cm
Not obvious
No more than 0.3 cm2
Not obvious
3cm not less than 9 needles
3cm not less than 7 needles
3cm not less than 4 needles
1cm 12~14 needlesbzxZ.net
1cm not less than 9 needles
No less than 8 threads per hole
No less than 1 thread per hole
No. 3 part
3.0~~5. 0 cm
2.0~3.0cm
2. 0~~4.0 cm
Not obvious
Not more than 0. 5cm2
Not obvious
Except for special needs
Calculated on one side
Machine buttonhole
Handmade buttonhole
The height of the foot thread is consistent with the thickness of the stop
GB/T 2666—2001
3.9.2 The sewing lines of each part are straight, neat, flat and firm. 3.9.3 The tightness of the upper and lower threads is appropriate, without skipping and breaking. There should be a back stitch at the starting and ending needles. 3.9.4
Two lines should be sewn between 5cm above and 10cm below the knot at the lower end of the side seam pocket opening, 1/2 of the lower crotch seam, the back crotch seam, and the small crotch seam. Or use chain stitching to sew.
The padding of the bag cloth should be folded or overlocked.
Both ends of the pocket opening should be knotted, and the back stitch can be used with a bar tack machine or a flat sewing machine. The buttonhole is positioned accurately and the size is appropriate. The button and the eye are aligned and neat and firm. The button foot is at an appropriate height and the knot is not exposed. The trademark, size mark, ingredient mark, and washing mark are positioned correctly, clearly and accurately. 3.9.9 There shall be no two single jumps and continuous jumps within 30cm of the sewing stitches of each part. Chain stitches are not allowed to jump. 3.10 The specification limit deviations of the main parts of the finished product shall be as specified in Table 4.
Part name
3.11 Appearance quality
Appearance quality shall be as specified in Table 5.
Part Name
Door, lining
Front, back crotch
Trouser leg opening
3.12 Ironing appearance requirements
Face, lining, and lining are flat and appropriate in tightness
Appearance quality requirements
Allowable deviation
Face, lining, and lining are flat and appropriate in tightness, and the length difference is not more than 0.3cm. The door placket is not shorter than the lining placket. Round and flat.
The length and width are consistent. The position is accurate and symmetrical, and the front and back difference is not more than 0.6cm, and the height difference is not more than 0.3cm. The height and size of the pocket position and the front and back size are not more than 0.5 cm, and the pocket opening is straight and flat. The length and fatness of the two trouser legs are not more than 0. 3cm. The size of the two leg openings is not more than 0.3cm.
All parts should be ironed flat and neat, without yellowing, water stains or gloss. The ironing lines should be straight, the buttocks should be round and the trouser legs should be straight. 3.13 Physical and chemical performance requirements
3.13.1 Shrinkage after dry cleaning
According to the provisions of 6.
Part name
3.13.2 Color fastness requirements
The allowable degree of color fastness to dry cleaning and color fastness to dry friction of the finished product shall be as specified in Table 7. 278
Shrinkage after dry cleaning
Dry cleaning resistance
Dry friction resistance
3.13.3 Pilling requirements
GB/T 2666 - 2001
Superior products
≥4-5
The allowable degree of fuzzing and pilling of the finished product shall be as specified in Table 8. Table 8
Combed (suede)
Combed (glossy)
3.13.4 Sewing strength regulations
Superior products
≥3—4
≥3--4
Allowable degree of color fastness
≥3·4
Allowable degree of pilling
Qualified products
≥3 4
First-class products, qualified products
≥3—4
The degree of seam cracking in the main parts of the finished product shall be in accordance with the provisions of Table 9. The seam strength of the back crotch seam of the finished product shall not be less than 140N/5.0cm×10cm. Table 9
Superior products
First-class products, qualified products
3.13.5 The formaldehyde content released by the finished product shall be ≤300mg/kg. 3.13.6 The composition and content of the raw materials used in the finished product shall be consistent with the contents marked in the instructions for use. 4 Inspection (test) methods
4.1 Inspection tools
4.1.1 Steel tape measure.
4.1.2 Grey scale for evaluating discoloration (GB250). 4.1.3 Grey scale for evaluating staining (GB251). 4.1.4 Sample photos of appearance defects of men's and women's woolen clothing. Degree of cracking
4.1.5 Sample photos of pilling of combed wool fabrics (suede) (GB/T4802.1), sample photos of pilling of combed wool fabrics (glossy) (GB/T4802.1), sample photos of pilling of carded wool fabrics (GB/T4802.1). 4.2 Determination of finished product specifications
The specifications of the main parts of the finished product shall be in accordance with the provisions of 3.2.2. 4.2.1
The measurement method of the main parts of the finished product shall be in accordance with the provisions of Table 10 and Figure 2, and the allowable deviation shall be in accordance with the provisions of 3.10. Table 10
Part Name
Measure vertically from the waist opening along the side seam to the leg opening. Measurement method
Measure horizontally along the middle of the waist width with the trouser hook (button) fastened (calculated around the periphery). Note: Special needs shall be in accordance with the company's regulations.
4.3 Appearance measurement
4.3.1 The stripe and grid shall be in accordance with the provisions of 3.5.
GB/T2666—2001
4.3.2 When measuring the degree of color difference, the yarn direction of the measured part must be consistent, and an equivalent light source of 6001x or above shall be used. The incident light is about 45° to the measured object, and the observation direction is roughly perpendicular to the measured object, and the distance is 60cm for visual inspection. The color difference shall be in accordance with the provisions of 3.7 and compared with the GB250 sample card. 4.3.3 The allowable degree of defects in each part of the finished product shall comply with the provisions of 3.8 and be compared with the sample photos of defects on the appearance of men's and women's woolen clothing. 4.3.4 Sewing shall comply with the provisions of 3.9. The stitch density shall comply with the provisions of Table 3 and be measured at any 3cm on the finished product (except for thick and thin parts). 4.3.5 Determination of weft skewness: Calculate the weft slope according to formula (1). Weft (strip) inclination and maximum horizontal distance × 100 Weft slope (%) -
4.3.6 Appearance ironing shall comply with the provisions of 3.12.
4.4 Determination of physical and chemical performance indicators
Width of garment pieces
4.4.1 The allowable degree of shrinkage after dry cleaning of finished products shall comply with the provisions of 3.13.1 and the test method shall comply with the provisions of FZ/T80007.3. (1)
4.4.2 The permissible degree of color fastness to dry rubbing and color fastness to washing of the product shall comply with the provisions of 3.13.2, and the test method shall comply with the provisions of GB/T3920 and GB/T5711.
4.4.3 The permissible degree of rubbing pilling of the finished product shall comply with the provisions of 3.13.3, and the test method shall comply with the provisions of GB/T4802.1, and shall be compared with the pilling samples of combed wool fabrics (suede, glossy) (GB/T4802.1) and the pilling samples of carded wool fabrics (GB/T4802.1). 4.4.4 The degree of seam cracking of the product shall comply with the provisions of 3.13.4, and the test method shall comply with the provisions of Appendix A of this standard. 4.4.4.1 The sampling location for the test of the degree of seam cracking of the finished product shall comply with the provisions of Table 11. Table 11
Name of sampling position
Back seam of trousers
Side seam of trousers
Crotch seam
Sampling position regulations
Centered by half of the arc line of the back gantry
Centered by the upper third of the side seam of trousers
Centered by the upper third of the crotch seam
4.4.4.2 The permissible strength of the back crotch seam of the finished product shall comply with the provisions of 3.13.4. The sampling position is shown in Appendix B. The test method shall comply with the provisions of FZ/T20019.
5 The permissible formaldehyde content released by the product shall comply with the provisions of 3.13.5. The test method shall comply with the provisions of GB/T2912.1. 4.4.5
GB/T 2666—2001
4.4.6 The test methods for the composition and content of raw materials used in finished products shall comply with the provisions of GB/T2910, GB/T2911, etc. 4.4.7 The sampling sites for physical and chemical performance tests not mentioned here can be selected arbitrarily on the finished products according to the test items. 5 Inspection classification rules
5.1 Inspection classification
The inspection of finished products is divided into factory inspection, general type inspection and type inspection. 5.1.1 Factory inspection shall comply with the provisions of Chapter 3, except for 3.13. 5.1.2 General type inspection shall comply with the provisions of Chapter 3, except for 3.13.4. 5.1.3 Type inspection shall comply with the provisions of Chapter 3 (only used in cases of quality arbitration, etc.). 5.2 Quality grade classification rules
The quality grade of finished products is based on the existence and severity of defects. The individual products in the sample are graded according to the number of defects and their severity, and the batch grade is divided according to the number of individual products in the sample. 5.2.1 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) Serious defects
Defects that do not seriously reduce the product's performance and do not seriously affect the product's appearance, but are more seriously non-compliant with the provisions of the standard, are called serious defects.
c) Minor defects
Defects that do not meet the provisions of the standard but have a minor impact on the product's performance and appearance are called minor defects. 5.2.2 The basis for determining quality defects is shown in Table 12. Table 12
Appearance and
Sewing quality
Minor defects
The trademark is not straight and obviously skewed; the nail business
Major defects
The color of the marking line and the background color of the trademark are not suitable
! The content of the instructions for use is inaccurate.
The adhesive interlining is debonded, seeping, and wrinkled.
The waistband, lining, and lining are not flat; the waist lining is obviously spitting out; the waist is obviously not smooth; loose
tight and uneven.
The length and left-right asymmetry of the darts are greater than 0.8cm.
The length of the string belt is greater than 0.6
cm; the front-back difference is greater than 0.6 cm;
The height difference is greater than 0.3cm.
The string belt is not nailed firmly (one end is lifted).
Serious defects
The instructions for use are missing.
Appearance and
Sewing quality
Minor defects
GB/T 2666—2001
Table 12 (continued)
Major defects
The difference between the length of the inner placket is greater than
0.3cm; the placket is shorter than the inner placket; the placket
stop is obviously spitting out: the placket is obviously
stitched and uneven.
The buttonhole is skewed, and the difference between the buttonhole and the eye is greater than
0.3cm.
The side pocket opening is obviously uneven; not straight;
The difference between the size of the two pocket openings is greater than
The height of the upper opening of the side pocket, the difference between the front and the back is greater than
0.5cm.
Buttonhole jumps; thread opens; button falls off.
The back pocket cover is not round, square, or flat
most; the inside of the pocket cover is obviously spitted out; the width of the inlay is obviously exposed. The narrowness is greater than 0.2cm; the pocket cover is smaller than the pocket
mouth by more than 0.3cm.
The bottom of the pocket cloth is not flat.
The side seams are not smooth and flat; the seams are not divided
The side seams and crotch seams are not opposite (the ironing
line of the trousers is misplaced); the difference between the two seams at the horizontal crotch is greater than
0.8cm, and the difference between the two seams at the trouser legs is greater than
0.5cm.
The lengths of the two trouser legs are inconsistent and the difference is greater
The lengths of the two trousers are inconsistent and the difference is greater
0.3cm.
More than 0.8cm.
The size of the two trouser legs and the hem is not the same
The size of the two trouser legs and the hem is not the same
, and the difference is greater than 0.3cm.
The trouser legs are not even, the silk feet are larger than
, and the difference is greater than 0.6cm.
The trouser legs are obviously uneven, and the hanging feet are greater than
0. 6 cm; the front and back of the two legs of the swinging feet are different by
1 cm; the front and back of the two legs of the male feet are different by
greater than 1.5cm.
The width of the hem of the trouser legs is inconsistent; the stop of the foot strip is not exposed; it is inconsistent, the position is inaccurate, and the difference is greater than 0.6cm.
The sewing line is obviously not firm and straight; the surface and bottom lines are not tight; the joints are obviously not overlapped.
greater than 2cm.
Chain thread skipping. Double track of exposed thread.
Serious defects
Appearance and
sewing quality
Specifications allowable deviation
Button sewing and
Minor defects
GB/T 2666 - 2001
Table 12 (complete)
Serious defects
Continuous skipping of stitches at the seam (two single skipping stitches within 30cm are counted as continuous); needle holes in parts 1 and 2 are exposed.
Surface parts are hairy, detached, and leaking (affecting use and firmness).
All parts are not ironed flat; there are obvious stains, and the stains are larger than splashes, bright light, and stains.
There are more than 3 dead lines larger than 1.5cm on the surface.
The color difference of the surface parts does not meet the requirements of this standard
2cm2; the splash is larger than 4cm.
The splicing does not meet the requirements of 3.6.
The color difference of the surface parts exceeds the requirements of this standard
within half a grade; the lining affects the color setting by more than half a grade; the color difference of the village cloth is less than 3-4 grades.
Less than 3 grades.
The color and hue of the sewing thread are not
compatible with the fabric. The color and hue of the button thread are not
compatible with the fabric.
2 and 3 parts exceed the requirements of this standard.
For stripes and grids, the weft bias exceeds the requirements of this standard
by 50% or less.
Below the standard by 2 stitches
(including 2 stitches).
1 part exceeds the standard.
Serious defects
There are serious stains, the stains are greater than
50cm2; yellowing, damage and other serious effects on use and appearance.
For stripes and grids, the weft bias exceeds the standard. The fabric is reversed and straight, and the whole body is not straight, more than 50%.
Below the standard by more than 2 stitches.
The specification exceeds the standard by 50%
The specification exceeds the standard by 50%
Within 50%.
More than.
The difference between the buttonhole spacing is greater than 0.3cm:
The deviation is greater than 0.2cm, the yarn is frayed, the thread is open; the hair is leaking and the eye is open. Out.
is not consistent; special patterns are not consistent in the forward direction.
The specifications exceed the provisions of this standard by 100% or more.
Buttons and metal buckles fall off (including accessories
The difference between the button and the eye is greater than 0.2cm, and the difference between the button and the eye is greater than 0.5cm (including accessories, etc.); the buttons are not firmly nailed.
The zipper is obviously not flat and straight;
(including accessories, etc.).
The color tone of the zipper base fabric is not suitable for the fabric | The difference between the width of the zipper is ≥0.5cm.
1 The above defects are calculated cumulatively by serial number. Defects not covered by this rule can be judged according to the provisions of the standard and with reference to similar defects in the rules. 3 All lost work, less sequence, and wrong sequence are serious defects. Missing parts are serious defects. 4 Physical and chemical properties - one item is unqualified, which means that the sampling batch is unqualified. etc.); metal parts are rusted.
The zipper has missing teeth and the zipper lock has fallen off.
5.3 Sampling regulations
The number of appearance sampling is based on the product batch:
10 pieces are sampled for less than 500 pieces (including 500 pieces). GB/T2666--2001
20 pieces are sampled for more than 500 pieces to 1000 pieces (including 1000 pieces). 30 pieces are sampled for more than 1000 pieces,
4 pieces are sampled for physical and chemical properties.
5.4 Judgment rules
5.4.1 Judgment of appearance of single piece (sample)
Excellent product: serious defect number=0
Number of major defects=0
Number of major defects=0
Number of major defects=0
Number of major defects≤1
Number of minor defects≤4
Number of minor defects≤7 or
Number of minor defects≤3
Qualified product: serious defect number==0Number of major defects=0Number of minor defects≤10 or serious defect number=0Number of major defects≤1Number of minor defects≤6 or serious defect number=0Number of major defects≤2Number of minor defects≤25.4.2 Batch judgment
Excellent product batch: the number of excellent products in the appearance sample is ≥90%, and the number of first-class products and qualified products is <10%. The physical and chemical performance test meets the requirements of excellent products.
First-class batch: the number of first-class products or above in the appearance sample is ≥90%, and the number of qualified products is ≤10% (excluding unqualified products). Physical and chemical performance tests meet the first-class product index requirements.
Qualified batch: the number of qualified products or above in the appearance sample is ≥90%, and the number of unqualified products is ≤10% (excluding unqualified products with serious defects). Physical and chemical performance tests meet the qualified product index requirements. When the appearance sewing quality judgment is inconsistent with the physical and chemical performance judgment, a low-level judgment is performed. 5.4.3 The number of each appearance batch determined in the random inspection meets the requirements of this standard and is determined to be qualified for batch delivery. 5.4.4 If the number of each appearance batch determined in the random inspection does not meet the requirements of this standard, a second random inspection shall be carried out. The number of random inspections shall be doubled. If it still does not meet the requirements of the standard, all products shall be repaired or downgraded. 6 Marking, packaging, transportation and storage
Marking, packaging, transportation and storage shall be carried out in accordance with FZ/T80002. 281
GB/T2666---2001
Appendix A
(Appendix to the standard)
Test method for the degree of seam disengagement
This test method refers to FZ/T20019-1999 "Test method for the degree of seam disengagement of wool woven fabrics". A1 Principle
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 (100±5)N.
A3 Equipment and materials
A3.1 For ordinary household and industrial sewing machines, the sewing needle should be of a model suitable for the fabric used. A3.2 Sewing thread should be of a quality suitable for the fabric used. A3.3 The distance between the upper and lower clamps of the fabric strength machine is 10.0cm, the lower clamp has a descending speed of 5.0cm/min when there is no load, and the pre-tension hammer is 2N.
A4 Test environment
Standard atmosphere for humidity adjustment and testing, temperature (20±2)℃, relative humidity 60%～70%. A5 Test requirements and preparation
A5.1 The sample size of the finished product is 5.0cm×20.0cm (including the clamping part), and its edge should be perpendicular to the seam. A5.2 Number of specimens Three pieces should be cut from the radial direction of the fabric or finished product. A5.3 Fold the cut specimen in half and sew it with a sewing machine at a position 1.3 cm parallel to the crease mark. Tie the suture firmly and 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 clamps (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 edges of the clamps are parallel to each other.
A6.3 Gradually increase the load to (100 ± 5) N at a speed of 5.0 cm/min, stop the lower clamp from descending, and then measure the maximum distance of the seam separation vertically on the strength machine. See Figure A1.285
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