Some standard content:
GB17956—2000
Dust-proof clothing is a special clothing for workers in mining, building materials, chemical, metallurgy, food, medicine, military and other industries to prevent dust pollution from harming their skin.
At present, ISO has no such standard. Only the former Soviet Union and Poland have formulated similar standards, such as IOCT17804-1985 "Test Method for Dust Permeability of Fabrics and Seams", ['OCT12.4.142--1984 "Classification of Dust Permeability of Special Fabrics", PN--90/P04996 "Requirements for Dust-proof Clothing Materials", etc.; China began to study this type of clothing materials around the 1990s, and formulated some enterprise standards and local standards. This standard is based on this and is formulated for clothing against general dust according to actual domestic needs. Appendix A and Appendix B of this standard are both standard appendices. Appendix C of this standard is a suggestive appendix.
This standard is proposed by the Work Safety Bureau of the State Economic and Trade Commission of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Labor Protection Products. The drafting unit of this standard is the Safety Science and Technology Research Center of the State Economic and Trade Commission. The main drafters of this standard are Cheng Xingren, Qian Changjian, Liu Qian, Zhang Hongju and Bai Yumei. 201
1 Fan Pu
National Standard of the People's Republic of China
Dustproof clothing
This standard specifies the classification, technical requirements, test methods, inspection rules, marking and packaging of dustproof clothing. This standard is applicable to dustproof clothing made of breathable (wet) fabrics or materials that are resistant to normal dust. 2 Referenced standards
GB 17956—2000
The provisions contained in the following standards become the provisions of this standard through reference. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 2828—1987
Batch inspection Attribute sampling procedure and sampling table (applicable to inspection of continuous batches)GB/T 28291987
Periodic inspection Attribute sampling procedure and sampling table (applicable to inspection of production process stability)GB/T3917.1—1997
Textiles-Tear properties of fabrics-Part 1: Determination of tear strength-Impact pendulum methodGB/T 3921. 1 ---1997
GB/T 3922--1995
Textiles
Tests for colour fastness-Colour fastness to washing: Test 1
Textiles-Test method for colour fastness to perspiration
GB/T 3923.1—1997
GB/T 5713--1997
GB/T 8630--1988
GB 12014--1989
Textiles-Tensile properties of fabrics-Part 1:Determination of breaking force and elongation at break-Strip method
Textiles
Tests for colour fastnessColour fastness to water
Determination of dimensional change of textiles during washing and dryingAntistatic work clothes
GB/T 13640-1992
GB/T 13661--1992
Labour protective clothing types
General protective clothing
ID 30-1992
Labour protective raincoats
3 Definitions
The following definitions are used in this standard
3.1 Dustproof clothing
Protective clothing for protecting workers from general dust hazards. 3.2 General dust general dust
Dust that is non-toxic to human skin and has no radioactive hazard. 4 Product classification
4.1 According to the purpose, it is divided into Class A dust-proof clothing (ordinary type) and Class B dust-proof clothing (anti-static type). 4.2 According to the style, it is divided into one-piece dust-proof clothing (Figure 1) and split dust-proof clothing (Figure 2). State Administration of Quality and Technical Supervision approved on January 5, 2000 202
Implementation on June 1, 2000
5 Requirements
5.1 Basic performance
GB17956-2000
The dust-proof efficiency, dust-collection amount and electrical charge of Class A and Class B dust-proof clothing shall comply with the provisions of Table 1. Table 1
Dust-proof efficiency
Dust-proof clothing categories
Before washing
Physical indicators of clothing materials
After washing
Dust content
mg/(10cm×15cm）
Before washing
≤150
The breaking strength and tearing strength of clothing materials shall comply with the provisions of Table 2. Table 2
Breaking strength
≥800
≥490
≥490
≥390
Shrinkage rate of clothing materials: less than 3% in the warp direction and less than 3.5% in the weft direction. The color fastness of clothing materials shall comply with the provisions of Table 3
5.3 Structure
Water fastness
After washing
Soap fastness
Electrical charge
uc/piece (set)
Before washing
Tear strength
After washing
Perspiration fastness
5.3.1 Dust-proof clothing requires tight collar, cuffs, and trouser legs. Split-piece clothing requires tight hems. The other parts are moderately tight and easy to put on and take off. 5.3.2
When zippers or buttons are used at the opening of dust-proof clothing, they shall not be exposed. 5.3.3 Class B dust-proof clothing shall not have exposed metal accessories, and the lining of non-antistatic fabric shall not exceed 20% of its inner surface area. 203
5.3.4 Dust-proof clothing shall not have open pockets.
5.4 Sewing
GB17956—2000
5.4.1 The sewing strength of garment pieces shall not be less than 100N; the sewing strength of buttons shall not be less than 140N. 5.4.2 The sewing parts shall be tight and firm, and double hem sewing shall be adopted, and the seam at each place shall not be less than 0.8cm. According to the performance of the fabric, the needle number, thread specification and stitch density shall be appropriately determined.
5.4.3 Stitch length: 12~~14 stitches/3cm for fine thread, and not less than 9 stitches/3cm for thick thread. Button sewing: not less than 8 stitches/eye for fine thread, and not less than 4 stitches/eye for thick thread; the distance between the eye positions shall be evenly hooked, and the button and eye positions shall be opposite. 5.5 Specifications
For the specifications of one-piece dust-proof clothing, please refer to Appendix C; for the specifications of two-piece dust-proof clothing, please refer to GB/T13640.5.6 Appearance
5.6.1 For one-piece or two-piece clothing, the local structure should be in proportion to the overall structure, and the lines of each part should be smooth and the shape should be natural. 5.6.2 There should be no damage, holes, spots, dirt or other defects that affect the wearing of clothing. 5.6.3 The collar and sleeves should be straight, the symmetrical parts should be consistent, the threads should be trimmed clean, and the clothes should be ironed flat. 6 Test methods
6.1 The dust-proof efficiency should be tested according to the method in Appendix A, and the dust-adherence should be tested according to the method in Appendix B; the electric charge should be tested according to Appendix A in GB12014-1989, and the washability should be tested according to Appendix B in GB12014-1989. 6.2 The sewing strength shall be tested according to 7.5 of GB/T13661-1992, and the button sewing strength shall be tested according to 6.7 of LD30-1992. 6.3 The breaking strength shall be tested according to GB/T3923.1, and the tearing strength shall be tested according to GB/T3917.1. 6.4 The shrinkage rate shall be tested according to GB/T8630, and the color fastness shall be tested according to GB/T5713.GB/T3921.1 and GB/T3922. 6.5 The appearance quality shall be visually inspected under natural light or 6001x light source. The structure and sewing shall be inspected according to the provisions of the corresponding clauses. 7 Inspection rules
7.1 Factory inspection
7.1.1 The inspection batch shall consist of the same variety of goods delivered at the same time, and each batch shall not exceed 1.000 pieces (sets). 7.1.2 Products are sampled according to the sample size code in Table 2 of GB/T2828-1987 when leaving the factory. The normal inspection-sampling plan is adopted, and the inspection items, non-conforming classification, inspection level and qualified quality level AQL shall comply with the provisions of Table 4. Table 4
Inspection items
Dust collection
Sewing process
7.2 Type inspection
Non-conforming classification
Corresponding clauses
Inspection level
Qualified quality level (AQI)
Type inspection is carried out by a technical inspection unit approved by the competent authority. Type inspection is carried out according to GB/T2829, using a one-time sampling plan with discrimination level I, and is calculated based on the number of non-conforming products per 100 units of products. Inspection items, non-conforming classification, discrimination level and non-conforming quality level RQI shall comply with the provisions of Table 5.
Inspection items
Dust prevention efficiency
Dust collection amount
Electrical charge amount
Sewing process
7.3 Handling of inspection results
Classification of non-conforming products
GB 179562000
Corresponding clauses
Discrimination level
Number of non-conforming quality levels
Number of determination groups
The determination of qualified and unqualified products in factory inspection and type inspection shall be carried out in accordance with Article 4.11 of GB/T2828 and GB/T2829-1987 respectively.
8 Marking, packaging and purchase and transportation
8.1 Marking
Product trademarks shall be nailed on the collars of finished products and the inner part of the waistband, and the specifications, grades and inspection certificates shall be attached. 8.2 Packaging
8.2.1 The packaging shall be neat, firm, clearly marked and accurate in quantity, and shall be accompanied by a packing list and instructions. 8.2.2 Each package shall be marked with the product number, product name, specifications, grade, production unit, factory date, certificate of conformity, and an inspection report for the batch of products. 8.3 Transportation
It is strictly forbidden to transport it together with corrosive and soluble items such as acid, alkali, oil, organic solvent, etc., and prevent it from being exposed to sunlight and rain. 8.4 Storage
The product should be stored in a dry and ventilated warehouse; the product should be away from heat sources (generally more than 2m); it is not allowed to be stored in the same warehouse with corrosive or soluble items.
The effective storage period is three years. After three years, it should be sampled and re-inspected according to regulations. It can continue to be used after passing the inspection. 205
A1 Scope of application
GB17956--2000
Appendix A
(Appendix to the standard)
Test method for dustproof efficiency
This appendix is applicable to measuring and evaluating the dustproof performance of dustproof clothing and clothing materials, expressed in %. A2 Instruments and Materials
A2.1 Equipment
A2.1.1 Rotary dust penetration test device (see schematic diagram A1): Basic parameters: rotation speed 120r/min±1r/min, wheel radius 100mm±2mm. 1 Shell: 2 Impeller; 3-- Bracket; 4-- Vacuum cleaner; 5-- Bracket; 6-- Small bag (sample); 7-- Counter Figure A1
A2.1.2 Analytical balance: sensitivity 0.0001g. A2.2 Test dust
Fine talcum powder, placed in a constant temperature drying oven at 105°C to dry constant weight, sieved through a 150-mesh sieve. A3 Sampling and test preparation
A3.1 Sampling
Cut 6 pieces of sample cloth from the sampled garments, each with a size of 15cm (warp) × 10cm (weft), of which 3 pieces are for testing before washing and the other 3 pieces are for testing after washing. A3.2 Washing
Use standard washing machine for washing, and the water temperature is room temperature. Add 5g ± 0.5g of neutral detergent to each liter of detergent, wash continuously for 4 hours, rinse 3 times (5 minutes each time), dry, and iron. A3.3 Sample processing
GB 179562000
Sew the sample into a small bag (front side facing inwards), fold it in half along the warp, sew it with a stitch length of 16 to 20 stitches/3cm and leave a small hole, and the distance between the stitching line and the edge of the sample is 1cm ± 0.15cm.
A3.4. Put the test dust with a mass of 10g±0.1g into the bag and sew it. A3.5 Test environment conditions
a) Temperature: 22℃±5℃;
b) Relative humidity: 50%±3%.
A4 Test
Hang the test dust bag on the rotating dust permeability test device, rotate for 1 min, then take it down and weigh it. A5 Result processing
A5.1 The dust prevention efficiency of each sample is calculated according to formula (A1): (%)=m×100
Dust prevention efficiency,%;
Where: 7——
ml—Mass of dust in the bag before the test, g;
—Mass of dust in the bag after the test, g.
A5.2 Dust prevention efficiency
Dust prevention efficiency before washing: take the average of the test results of three samples before washing. Dust-proof efficiency after washing: take the average of the test results of three washed samples. Appendix B
(Standard Appendix)
Dust-adherence test method
B1 Scope of application
This appendix is applicable to the measurement and evaluation of the dust-adherence performance of dust-proof clothing and clothing materials, expressed in mg/cm2. B2 Equipment and materials
B2.1 Equipment
B2.1.7 Dust box (see schematic diagram B1);
Dust generator
B2.1.2 Analytical balance: sensitivity 0.0001g; B2.1.3 Constant temperature drying oven.
(A1)
B2.2 Dust types and requirements are the same as Appendix AA2, 2. B3 Test preparation
B3.1 Test specimen
GB 17956-
6—2000
From the sampled garments, cut 6 pieces of sample cloth, each with a size of 15cm (warp) × 10cm (weft), of which 3 pieces are for testing before washing and the other 3 pieces are for testing after washing. The washing conditions are the same as those in Appendix AA3.2. B3.2 Before testing, place the sample in a constant temperature drying oven, adjust to 105℃ and dry to a constant weight for use. B3.3 Test environmental conditions
a) Temperature: 22℃±5℃;
b) Relative humidity: 50%±3%.
B4 Test
Hang the sample in the dust box, start the dust generator, and introduce the dust into the dust box to make the concentration greater than 80mg/m2. After 2h, take out the sample and dry it (105℃). Use a hair dryer (220V, 450W) to blow the floating dust on the sample at a distance of 20cm±1cm and weigh it. B5 Result Processing
B5.1 The dust amount of each sample is calculated according to formula (B1): m2 - mi
Where: Q
-dust amount, mg/(10cm×15cm);
mass of sample before test, g;
mass of sample after test, g.
B5.2 Dust Amount
Dust Amount Before Washing: Take the average of the test results of three samples before washing. Dust Amount After Washing: Take the average of the test results of three samples after washing. Appendix C
(Suggested Appendix)
Specifications of one-piece dustproof clothing
Total shoulder width
Pants leg circumferencebZxz.net
·(B1)3 Sample processing
GB 179562000
Sew the sample into a small bag (front side facing inwards), fold it in half along the warp direction, sew it with a stitch length of 16 to 20 stitches/3cm and leave a small hole. The distance between the stitching line and the edge of the sample is 1cm±0.15cm.
A3.4. Put the test dust with a mass of 10g±0.1g into the bag and sew it. A3.5 Test environmental conditions
a) Temperature: 22℃±5℃;
b) Relative humidity: 50%±3%.
A4 Test
Hang the test dust bag on the rotating dust permeability test device, rotate it for 1 min, then take it down and weigh it. A5 Result processing
A5.1 The dustproof efficiency of each sample is calculated according to formula (A1): (%) = m × 100
Dustproof efficiency, %;
Where: 7——
ml—Mass of dust in the bag before the test, g;
—Mass of dust in the bag after the test, g.
A5.2 Dustproof efficiency
Dustproof efficiency before washing: take the average of the test results of three samples before washing. Dustproof efficiency after washing: take the average of the test results of three samples after washing. Appendix B
(Standard Appendix)
Dust collection test method
B1 Scope of application
This appendix is applicable to the measurement and evaluation of the dust collection performance of dustproof clothing and clothing materials, expressed in mg/cm2. B2 Equipment and Materials
B2.1 Equipment
B2.1.7 Dust box (see diagram B1);
Dust generator
B2.1.2 Analytical balance: sensitivity 0.0001g; B2.1.3 Constant temperature drying oven.
(A1)
B2.2 Types of dust and requirements are the same as those in Appendix AA2 and 2. B3 Test preparation
B3.1 Sample
GB 17956-
6—2000
From the sampled clothing, cut 6 pieces of sample cloth, each with a size of 15cm (warp) × 10cm (weft), of which 3 pieces are for testing before washing and the other 3 pieces are for testing after washing. Washing conditions are the same as those in Appendix AA3.2. B3.2 Before testing, place the sample in a constant temperature drying oven and adjust to 105℃ to dry to constant weight for later use. B3.3 Test environment conditions
a) Temperature: 22℃±5℃;
b) Relative humidity: 50%±3%.
B4 Test
Hang the sample in a dust box, start the dust generator, and introduce dust into the dust box to make its concentration greater than 80mg/m2. After 2h, take out the sample and dry it (105℃). Use a hair dryer (220V, 450W) to blow the floating dust on the sample at a distance of 20cm±1cm and weigh it. B5 Result processing
B5.1 The dust content of each sample is calculated according to formula (B1): m2 - mi
Wherein: Q
-dust content, mg/(10cm×15cm);
mass of sample before test, g;
mass of sample after test, g.
B5.2 Dust content
Dust content before washing: take the average of the test results of three samples before washing. Dust content after washing: take the average of the test results of three samples after washing. Appendix C
(Suggested Appendix)
Specifications of one-piece dustproof clothing
Total shoulder width
Pants leg circumference
·(B1)3 Sample processing
GB 179562000
Sew the sample into a small bag (front side facing inwards), fold it in half along the warp direction, sew it with a stitch length of 16 to 20 stitches/3cm and leave a small hole. The distance between the stitching line and the edge of the sample is 1cm±0.15cm.
A3.4. Put the test dust with a mass of 10g±0.1g into the bag and sew it. A3.5 Test environmental conditions
a) Temperature: 22℃±5℃;
b) Relative humidity: 50%±3%.
A4 Test
Hang the test dust bag on the rotating dust permeability test device, rotate it for 1 min, then take it down and weigh it. A5 Result processing
A5.1 The dustproof efficiency of each sample is calculated according to formula (A1): (%) = m × 100
Dustproof efficiency, %;
Where: 7——
ml—Mass of dust in the bag before the test, g;
—Mass of dust in the bag after the test, g.
A5.2 Dustproof efficiency
Dustproof efficiency before washing: take the average of the test results of three samples before washing. Dustproof efficiency after washing: take the average of the test results of three samples after washing. Appendix B
(Standard Appendix)
Dust collection test method
B1 Scope of application
This appendix is applicable to the measurement and evaluation of the dust collection performance of dustproof clothing and clothing materials, expressed in mg/cm2. B2 Equipment and Materials
B2.1 Equipment
B2.1.7 Dust box (see diagram B1);
Dust generator
B2.1.2 Analytical balance: sensitivity 0.0001g; B2.1.3 Constant temperature drying oven.
(A1)
B2.2 Types of dust and requirements are the same as those in Appendix AA2 and 2. B3 Test preparation
B3.1 Sample
GB 17956-
6—2000
From the sampled clothing, cut 6 pieces of sample cloth, each with a size of 15cm (warp) × 10cm (weft), of which 3 pieces are for testing before washing and the other 3 pieces are for testing after washing. Washing conditions are the same as those in Appendix AA3.2. B3.2 Before testing, place the sample in a constant temperature drying oven and adjust to 105℃ to dry to constant weight for later use. B3.3 Test environment conditions
a) Temperature: 22℃±5℃;
b) Relative humidity: 50%±3%.
B4 Test
Hang the sample in a dust box, start the dust generator, and introduce dust into the dust box to make its concentration greater than 80mg/m2. After 2h, take out the sample and dry it (105℃). Use a hair dryer (220V, 450W) to blow the floating dust on the sample at a distance of 20cm±1cm and weigh it. B5 Result processing
B5.1 The dust content of each sample is calculated according to formula (B1): m2 - mi
Wherein: Q
-dust content, mg/(10cm×15cm);
mass of sample before test, g;
mass of sample after test, g.
B5.2 Dust content
Dust content before washing: take the average of the test results of three samples before washing. Dust content after washing: take the average of the test results of three samples after washing. Appendix C
(Suggested Appendix)
Specifications of one-piece dustproof clothing
Total shoulder width
Pants leg circumference
·(B1)
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