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FZ/T 73031-2024 English PDF

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FZ/T 73031-2024: (Compression stockings)
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Basic data

Standard ID FZ/T 73031-2024 (FZ/T73031-2024)
Description (Translated English) (Compression stockings)
Sector / Industry Spinning & Textile Industry Standard (Recommended)
Classification of Chinese Standard W63
Classification of International Standard 59.080.30
Word Count Estimation 17,157
Date of Issue 2024-07-05
Date of Implementation 2026-07-01
Older Standard (superseded by this standard) FZ/T 73031-2009
Issuing agency(ies) Ministry of Industry and Information Technology of the People's Republic of China
Summary This standard specifies the terms and definitions, product classification, requirements, tests, sampling rules, judgment rules, product instructions, packaging, transportation and storage of pressure socks.

FZ/T 73031-2009: Pressure socks

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Pressure socks ICS 59.080.30 W63 People's Republic of China Textile Industry Standard Compression socks Released on.2009-11-17 2010-04-01 implementation Ministry of Industry and Information Technology of the People's Republic of China

Foreword

This standard was proposed by the China Textile Industry Association. This standard is under the jurisdiction of the National Textile Standardization Technical Committee Knitting Subcommittee (SAC/TC209/SC6). This standard is mainly drafted by. Zhejiang Nair Group Co., Ltd., Langsha Knitting Co., Ltd., Zhejiang Jiamengyi Socks Co., Ltd., Gaoyao City Golden Coast Weaving Factory Co., Ltd., National Knitting Product Quality Supervision and Inspection Center. The main drafters of this standard. Shi Jigang, Liu Ailian, Jin Jianming, Yu Jianjun, Dai Zhengyi. Compression socks

1 Scope

This standard specifies the terms and definitions of pressure socks, product classification, requirements, test methods, determination rules, product instructions, packaging, transportation Loss and storage. This standard is applicable to the identification of the quality of chemical fiber compression stockings, cotton (hair, chemical fiber blended yarn) and chemical fiber interlaced compression stockings. Other fiber compression stockings Refer to the implementation.

2 Normative references

The terms in the following documents become the terms of this standard by reference to this standard. All dated references, followed by all Modifications (not including errata content) or revisions do not apply to this standard, however, parties to agreements based on this standard are encouraged to study Is it possible to use the latest version of these files? For undated references, the latest edition applies to this standard. GB/T 250 gray color card for color change (GB/T 250-2008, ISO 105-A02..1993, IDT) GB/T 251 evaluation of gray sample card for staining (GB/T 251-2008, ISO 105-A03..1993, IDT) GB/T 2910 (all parts) Quantitative chemical analysis of textiles Textiles -- Determination of formaldehyde -- Part 1 . Free and hydrolyzed formaldehyde ( water extraction method ) GB/T 3920 Textile color fastness test color fastness to rubbing (GB/T 3920-1997, eqv ISO 105-X12.1993) GB/T 3921 Textile color fastness test color fastness to soaping (GB/T 3921-2008, ISO 105-C10.2006, MOD) GB/T 3922 Test method for colour fastness to perspiration of textiles (GB/T 3922-1995, eqv ISO 105-E04.1994) GB/T 4856 needle cotton fabric packaging GB 5296.4 Consumer Goods Instructions for Use of Textiles and Clothing GB/T 5713 Textile color fastness test color fastness to water (GB/T 5713-1997, eqv ISO 105-E01.1994) GB/T 7573 Determination of pH of textile water extracts (GB/T 7573-2002, ISO 3071. 1980, MOD) GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values GB 18401 National Textile Products Basic Safety Technical Specifications GSB16-2159-2007 Standard Depth Sample Card for Knitting Products (1/12) FZ/T 01053 Identification of textile fiber content FZ/T 01057 (all parts) Textile fiber identification test method FZ/T 01095 Test method for fiber content of textile spandex products

3 Terms and definitions

The following terms and definitions apply to this standard. 3.1 The gradient from the crotch to the sock (millimeter mercury mmHg) is gradually changed, and there is a feeling of pressure when wearing, and there is a feeling of relaxation during exercise. Socks.

4 Product Categories

According to the raw materials, it is divided into elastic nylon yarn (polyester silk)/spandex core-spun yarn interlaced compression socks, cotton (wool, chemical fiber blended yarn)/spandex core-spun yarn interlacing pressure Pressure socks and chemical socks interwoven with other fibers.

5 requirements

5.1 Requirements The requirements are divided into two aspects. appearance quality and intrinsic quality. Appearance quality includes specification size, surface defects, and sewing requirements. Intrinsic quality Including pressure value, fiber content, formaldehyde content, pH value, color fastness to soaping, color fastness to water, color fastness to perspiration, color fastness to rubbing, Flavor, decomposable aromatic amine dyes and other indicators. 5.2 Classification regulations 5.2.1 The quality of the compression stockings shall be divided into first-class products and qualified products in units of double. 5.2.2 The quality of the pressure socks is graded, the appearance quality is based on double evaluation, the internal quality is criticized, etc., and the combination of the two is determined according to the minimum product. 5.3 Appearance quality requirements and grading regulations 5.3.1 Appearance quality requirements 5.3.1.1 The name of each part of the compression stockings is shown in Figure 1 and Figure 2. 1---sock bottom; 2---foot surface; 3---Socks; a---lifting needle starting point; b---踵 point (the intersection of the sock with the arc and the arc); c---The intersection of the needle extension line and the sock. Figure 1 Name of the various parts of the compression stockings 1---Total length; 2---mouth height; 3---mouth width; 4---tube length; 5---higher; 6---Bottom length. Figure 2 Specification of the size measurement of each part of the compression stockings 5.3.1.2 Specifications and tolerances are shown in Tables 1 to 6. Table 1 elastic nylon yarn (polyester silk)/spandex core yarn interlaced knee under the tube compression stock size specifications and tolerances in centimeters The length of the sock Bottom length tolerance Total length High mouth Mouth width Mouth width tolerance 22-24 18 24-26 20 26-28 22 28-30 24 ±1 31 2 11.5 ±1 Note 1. When the total length is from the pressure sock to the die leg, the high center of the sock is aligned with the corresponding pressure value test point. Note 2. If the customer has other requirements for the specification size, it shall be executed according to the customer's requirements. Note 3. The open toe compression stockings do not evaluate the bottom length. Table 2 elastic nylon yarn (polyester silk)/spandex core yarn interwoven over the knee in the tube compression stock size specifications and tolerances in centimeters The length of the sock Bottom length tolerance Total length High mouth Mouth width Mouth width tolerance 22-24 18 24-26 20 26-28 22 28-30 24 ±1 55 3 12.5 ±1 Note 1. When the total length is from the pressure sock to the die leg, the high center of the sock is aligned with the corresponding pressure value test point. Note 2. If the customer has other requirements for the specification size, it shall be executed according to the customer's requirements. Note 3. The open toe compression stockings do not evaluate the bottom length. Table 3 elastic nylon yarn (polyester silk)/spandex core yarn interwoven long tube compression stock specifications size and tolerance unit is cm The length of the sock Bottom length tolerance Total length High mouth Mouth width Mouth width tolerance 22-24 18 24-26 20 26-28 22 28-30 24 ±1 70 3 13.5 ±1 Note 1. When the total length is from the pressure sock to the die leg, the high center of the sock is aligned with the corresponding pressure value test point. Note 2. If the customer has other requirements for the specification size, it shall be executed according to the customer's requirements. Note 3. The open toe compression stockings do not evaluate the bottom length. Table 4 Cotton (wool, chemical fiber blended yarn)/spandex core-spun yarn interlaced knee under the tube compression stock size specifications and tolerances in centimeters The length of the sock Bottom length tolerance Total length High mouth Mouth width Mouth width tolerance 22-24 19 24-26 21 26-28 23 28-30 25 ±1 33 2 12.5 ±1 Note 1. When the total length is from the pressure sock to the die leg, the high center of the sock is aligned with the corresponding pressure value test point. Note 2. If the customer has other requirements for the specification size, it shall be executed according to the customer's requirements. Note 3. The open toe compression stockings do not evaluate the bottom length. Table 5 Cotton (wool, chemical fiber blended yarn)/spandex core-spun yarn interlaced over the knee in the tube compression stock size specifications and tolerances in centimeters The length of the sock Bottom length tolerance Total length High mouth Mouth width Mouth width tolerance 22-24 19 24-26 21 26-28 23 28-30 25 ±1 57 3 13.5 ±1 Note 1. When the total length is from the pressure sock to the die leg, the high center of the sock is aligned with the corresponding pressure value test point. Note 2. If the customer has other requirements for the specification size, it shall be executed according to the customer's requirements. Note 3. The open toe compression stockings do not evaluate the bottom length. Table 6 Cotton (wool, chemical fiber blended yarn)/spandex cored yarn interwoven long tube compression stockings size and tolerance unit in centimeters The length of the sock Bottom length tolerance Total length High mouth Mouth width Mouth width tolerance 22-24 19 24-26 21 26-28 23 28-30 25 ±1 72 3 14.5 ±1 Note 1. When the total length is from the pressure sock to the die leg, the high center of the sock is aligned with the corresponding pressure value test point. Note 2. If the customer has other requirements for the specification size, it shall be executed according to the customer's requirements. Note 3. The open toe compression stockings do not evaluate the bottom length. 5.3.2 Specification of size and size See Table 7. Table 7 Specifications and dimensions are specified in centimeters First-class quality products Bottom length Total length High mouth Mouth width Socks 22-30 Elastic nylon yarn (polyester silk)/spandex intertwined knee under tube compression socks Elastic nylon yarn (polyester silk)/spandex interwoven knee pressure tube, long tube Compression socks Cotton (wool, chemical fiber blended yarn)/spandex intertwined knee under tube compression socks Cotton (wool, chemical fiber blended yarn)/spandex interwoven knee pressure tube, long tube pressure Force socks Socks 22-30 Socks 22-30 Comply with Table 1 to Table 6 Standards and tolerances Exceeding the first class standard tolerance -1.5 Exceeding the first class standard tolerance -1.5 Exceeding the first class standard tolerance -3 Exceeding the first class standard tolerance -2 Exceeding the first class standard tolerance -4 Exceeding the first class standard tolerance -0.5 Exceeding the first class standard tolerance-1 5.3.3 Surface defects See Table 8. Table 8 Surface defects 名称 point name first-class quality products 1 thick wire (line) Slight. the foot surface is limited to 1cm, and the other parts are accumulated. Limited to 0.5 laps Obvious. the total length of the foot surface is limited to 0.5 laps, other parts 3 points within 0.5 laps

2 spun yarn

The position of the sock is not limited, the heel head is not allowed, other parts Position 0.5 lap Slight. not allowed in the heel head, no limit on other parts

3 tight road needle

Slight. The length of the sock is limited to 3, obvious. the sock Bit allowed Obvious. 3 parts of the socks are limited 4 spinning, elastic Slightly tapped the foot surface at 1cm1, other parts At 1.5cm2, slight tightening and tightness allow Slightly snagging 2.5cm2, obvious tightening and loose Tightening allowed 5 hair needles, tie hair The surface of the sock is not allowed, and other parts are slightly unaffected. Appearance allowed Obvious. the sock part is not allowed, other parts are allowed

6 flower needle

The surface of the foot is not allowed, and the other parts are not continuous. Limited to 8 The foot surface is limited to 2, and the dispersibility of other parts is allowed. 7 flower shape deformation does not affect the aesthetics, slightly affects the appearance of a pair of similar 8 The pattern of the foot surface is limited to 3, and other parts are allowed to be allowed slightly.

9 missing needles are not allowed

10 socks, socks, bubble points, slight allowable obvious permission Table 8 (continued) 名称 point name first-class quality products 11 color flowers, oil stains, slight staining does not affect the appearance, allowing more obvious permission 12 ray yarn Slight. not allowed on the sock, the toe is 0.3cm

1 place

0.3cm2 at the sock area, 0.3cm2 at the toe 13 length is not limited to 0.5cm, limit is 0.8cm 14 Yarn, spandex rolling is not allowed 15 spun yarn Slight. 0.3cm1 at the sock area, the heel head Not allowed Slight. not allowed at the heel head, other parts 0.5cm2 16 color difference The same pair is allowed 4-5; the same sock, heel and socks Allow 3-4 levels, except for different color heads The same pair allows 4 levels; the same sock, socks and socks Allow 3 levels, except for the color head 17 seam head angle Corner. Allow 2 needles for thick needles, 3 needles for medium needles, 4 needles for fine needles, Slightly tight Corner. Allow 4 needles for thick needles, 5 needles for medium needles, 6 needles for fine needles, Apparently tight Spilled needles, holes in the seams, Semi-filament, weaving holes Not allowed not allowed 19 Crossing (seam) is not allowed to allow 0.5cm to allow 1cm 20 scratches The surface of the foot is not allowed, and the other parts are repaired 0.5cm.

1 limit

Minor scratch repair allowed 21 repairs are not allowed 22 Damaged defects are not allowed Note 1. The length of the appearance defect is measured and measured by the longest length (diameter) of the defect. Note 2. Where the appearance is not specified in the provisions, the supply and demand sides shall, as appropriate, refer to the corresponding defects. Note 3. Descriptive degree description. Slightly---the point is not obvious in the visual, it can be seen by careful identification. Obviously --- does not affect the overall effect, but can feel the existence of defects. Significantly---the degree of sputum significantly affects the overall effect. Note 4. The thick needle is 96 needles or less, the middle needle is 96 needles or more to 180 needles, and the fine needle is 180 needles or more. Note 5. The color difference is assessed according to GB/T 250. 5.3.4 Sewing requirements The compression stockings are sewn with a stretch sewing thread. 5.4 Intrinsic quality requirements and grading regulations 5.4.1 Intrinsic quality requirements 5.4.1.1 The pressure value requirements of each part of the pressure socks are shown in Table 9. Table 9 The pressure value of each part of the compression stockings is in millimeters of mercury a Product category Pressure value Thigh heel (F) 8 Middle thigh (E) 8 10 At the beginning of the humerus, under the knee (D) 8 10 10 The largest part of the calf circumference (C) 12 14 14 Achilles tendon and calf muscle transition (B') 16 16 16 The finest part of the crotch circumference (B) 20 20 20 Note 1. The pressure value of each product must be within the gradient condition, except for the ankle and sock parts, the pressure values of the other parts are less than the standard value within 2mmHg. allow. Note 2. If the customer has other requirements for the pressure value, it shall be executed according to the customer's requirements. a1mmHg = 133.3224Pa. 5.4.1.2 Other requirements for intrinsic quality are shown in Table 10. Table 10 Other requirements for intrinsic quality First-class quality products Fiber content (net dry content) /% Performed in accordance with FZ/T 01053 regulations Formaldehyde content/(mg/kg) pH value Odor Decomposable aromatic amine dye/(mg/kg) Execute according to GB 18401 Water fastness/grade ≥ Color change 3-4 Stained 3 Color fastness to perspiration/level ≥ Color change 3-4 Stained 3 Color fastness to rubbing/grade ≥ Dry 3-4 Wet friction 3 (dark 2-3) Soap fast color fastness/grade ≥ Color change 3-4 Stained 3 Note. Color binning. According to GSB16-2159-2007 standard, >1/12 standard depth is dark, ≤1/12 standard depth is light color. 5.4.2 Intrinsic quality grading regulations See Table 11. Table 11 Intrinsic quality grading regulations First-class quality products Pressure value Meet the requirements of this standard. Same two pressures Sock difference 2mmHg allowed Exceeding the first-class standard -1mmHg allowed. Same double two Only the pressure socks difference exceeds the first grade difference 1mmHg allowed Color fastness Formaldehyde content pH value Odor Decomposable aromatic amine dye Fiber content (net dry content) In accordance with the provisions of this standard

6 Test methods

6.1 Number of samples 6.1.1 Appearance quality According to the delivery batch, the sample, color, specifications (specification dimensions and tolerances, surface defects, sewing requirements) are randomly sampled 2%~ 3%, but not less than 15 pairs (including intrinsic quality inspection samples). 6.1.2 Intrinsic quality according to delivery batch, by type, color, specification, pressure value, fiber content, formaldehyde content, pH value, odor, decomposable aroma A total of 5 pairs of amine dyes, dyeing fastness, etc. are randomly sampled to meet the number of tests. 6.2 Appearance quality inspection conditions 6.2.1 Lighting inspection is generally used. Use a 40W glaucoma or white fluorescent lamp with a lampshade, lampshade and inspection countertop center Vertical distance 50cm ± 5cm or under D65 light source. 6.2.2 If indoor natural light is used, the light should be properly placed. The direction of light in the direction of the north to the left (or right) is not allowed to direct sunlight. 6.2.3 During the inspection, the product shall be spread evenly on the inspection platform. The inspector shall face the surface of the product. If the suspicious defect involves the intrinsic quality, Fine inspection or reverse inspection, but the rating is considered to be straight. 6.2.4 When measuring the size of the specification, it should be measured without external tension. 6.3 Test preparation and test conditions 6.3.1 Intrinsic quality specimens shall not have defects that affect the accuracy of the test. 6.3.2 Before the test, the sample should be laid flat at room temperature for 20 h, then the temperature in the test chamber is 20 °C ± 2 °C, and the relative humidity is 65% ± The test was carried out after 4 hours under 4% conditions. 6.4 Test items 6.4.1 Specification size test 6.4.1.1 Test tool. The measuring ruler shall have a length greater than the test length and accurate to 0.1 cm. 6.4.1.2 Test operation. a) When measuring the length of the pressure sole, place the socks flat on a smooth surface, and measure the pressure socks and the ends of the socks with a ruler. measuring. b) When measuring the total length of the compression stockings, place the socks flat on a smooth surface and measure the starting point of the pressure socks and the end of the mouth with a measuring ruler. Line measurement. 6.4.2 Pressure value test 6.4.2.1 Test equipment Test equipment includes. a) Pressure Sock Tester. The measurable pressure range is 0-80mmHg. b) Pressure Sock Tester Accessories. Die legs and test probes. 6.4.2.2 circumference of each part of the die leg a) thigh heel (F) 54.5cm accurate to 0.1cm b) Middle thigh (E) 49.0cm Accurate to 0.1cm c) at the humerus at the humerus, under the knee (D) 35.8cm to the nearest 0.1cm d) The maximum circumference of the calf (C) 37.5cm to the nearest 0.1cm e) Achilles tendon and calf muscle transition (B') 30.0cm to 0.1cm f) The finest part of the circumference of the ankle (B) 24.0cm to the nearest 0.1cm 6.4.2.3 Test site 6.4.2.3.1 The test part of the knee compression tube is shown in Figure 3. A---heel heel; B---the finest part of the circumference of the crotch; B'---Achilles tendon and calf muscle transition; C---the maximum circumference of the calf; D---The humerus at the beginning of the knee, under the knee. Figure 3 knee down tube compression stockings 6.4.2.3.2 The test site of the over-the-knee tube compression stockings is shown in Figure 4. A---heel heel; B---the finest part of the circumference of the crotch; B'---Achilles tendon and calf muscle transition; C---the maximum circumference of the calf; D---the humerus at the beginning of the knee, under the knee; E---Central thigh. Figure 4 over the knee in the tube compression stockings 6.4.2.3.3 The test part of the long tube compression stocking is shown in Figure 5. A---heel heel; B---the finest part of the circumference of the crotch; B'---Achilles tendon and calf muscle transition; C---the maximum circumference of the calf; D---the humerus at the beginning of the knee, under the knee; E---the middle of the thigh; F---Thigh heel. Figure 5 long tube compression stockings 6.4.2.4 Test operation 6.4.2.4.1 Use the pressure legstock tester with a measurable range of 0-80mmHg and the accessory die leg and test of the compression stocking tester Combination of probes, test cotton (wool, chemical fiber blended yarn)/spandex core-spun yarn interlaced compression socks, elastic nylon yarn (polyester silk)/spandex core yarn Weaving compression stockings and compression stockings in which chemical fibers are interwoven with other fibers. 6.4.2.4.2 When testing, first align the detection point on the detection probe with the corresponding detection point on the die leg, and then fix the end of the detection probe. At the bottom of the heel of the die leg (see point A in Figure 3 to Figure 5), the corresponding tested socks are placed for pressure test. a) Under the knee pressure tube. When the pressure value is tested, the high middle of the sock on the die leg should be aligned with the die leg D, the heel of the die leg The bottom (A) is 40 cm from the pressure test point (D). b) Over-the-knee tube compression stockings. When testing the pressure value, the high and middle of the sock on the mold leg should be aligned with the die leg E, and the heel of the die leg The bottom (A) is 61 cm from the pressure test point (E). c) Long-tube compression stockings. When testing the pressure value, the high middle of the sock mouth on the mold leg should be aligned with the mold leg F, and the bottom of the mold leg (A) The pressure test point (F) is 73 cm. 6.4.2.4.3 If the sample is not aligned with the die leg or the test probe during the test, the test shall be repeated. 6.4.2.4.4 Calculation method. Calculate the pass rate according to formula (1), and repair the result to an integer according to GB/T 8170. F= 犪犫×100% (1) In the formula. F---qualification rate, %; 犪---test the total number of qualified places; 犫---Test the total number of places. 6.4.3 Color fastness test for soaping resistance Execute according to GB/T 3921, and the test conditions are carried out according to A(1). 6.4.4 Color fastness test of acid and alkali resistant perspiration According to GB/T 3922 (test site. cut the bottom of the socks). 6.4.5 Color fastness test According to GB/T 3920 (test site. cut the bottom of the socks, only straight). 6.4.6 Color fastness test According to GB/T 5713. 6.4.7 Fiber content test According to GB/T 2910, FZ/T 01057, FZ/T 01095 (test site. cut higher than the height). 6.4.8 Formaldehyde test According to GB/T 2912.1. According to GB/T 7573 regulations. 6.4.10 Odor, decomposable aromatic amine dye test According to the provisions of GB 18401. 6.4.11 Color fastness rating According to GB/T 250 and GB/T 251.

7 Decision rules

7.1 Processing method of test results 7.1.1 Appearance quality In the case of double, if the rate of non-conformity is more than 5.0% or the hole is broken or the needle is more than 3.0%, it is judged as unqualified. 7.1.2 Intrinsic quality 7.1.2.1 Pressure value to test the test point pass rate of all parts of 5 pairs (10) of pressure socks up to 80% and above for the batch of products grid. Under normal circumstances, it can be tested at room temperature. In case of dispute, the test data under constant temperature and humidity conditions shall prevail. 7.1.2.2 Formaldehyde content, pH value, color fastness to soaping, color fastness to water, color fastness to perspiration, color fastness to rubbing, odor, decomposable If the test results of melamine dye and fiber content are qualified, it is judged that the batch of products is qualified, and those who fail are judged that the batch of products is unqualified. 7.2 Re-inspection 7.2.1 At the time of inspection, either party has objection to the resu...

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