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GB/T 40270-2021 English PDF (GBT40270-2021)

GB/T 40270-2021 English PDF (GBT40270-2021)

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GB/T 40270-2021: Textiles - General technical requirements based on consumer experience
This Standard specifies general technical requirements based on consumer experience when using textile products. This Standard applies to end-use textile products for consumption and household products directly to consumers.
GB/T 40270-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.30; 61.020
CCS Y 76; W 57; W 63
Textiles - General technical requirements based on
consumer experience
ISSUED ON: MAY 21, 2021
IMPLEMENTED ON: DECEMBER 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
Introduction ... 4
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Requirements ... 7
5 Test methods ... 9
Annex A (normative) Textiles - Determination of the degree of linting of fabrics - Rubbing method ... 12
Textiles - General technical requirements based on
consumer experience
1 Scope
This Standard specifies general technical requirements based on consumer experience when using textile products.
This Standard applies to end-use textile products for consumption and
household products directly to consumers.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 250, Textiles - Tests for colour fastness - Grey scale for assessing change in colour
GB/T 251, Textiles - Tests for colour fastness - Grey scale for assessing staining
GB/T 4802.2, Textiles - Determination of fabric propensity to surface fuzzing and to pilling - Part 2: Modified Martindale method
GB/T 4802.3, Textiles - Determination of fabric propensity to surface fuzzing and to pilling - Part 3: Pilling box method
GB/T 6529, Textiles - Standard atmospheres for conditioning and testing GB/T 6682, Water for analytical laboratory use - Specification and test methods
GB/T 8629-2017, Textiles - Domestic washing and drying procedures for
textile testing
GB/T 12490-2014, Textiles - Tests for colour fastness - Colour fastness to domestic and commercial laundering
GB/T 12704.1, Textiles - Test method for water-vapor transmission of fabrics - Part 1: Desiccant method
GB/T 13772.2, Textiles - Determination of the Slippage Resistance of Yarns at a Seam in Woven Fabrics - Part 2: Fixed Load Method
GB/T 13773.1, Textiles - Seam tensile properties of fabrics and made-up textile articles - Part 1: Determination of maximum force to seam rupture using the strip method
GB 18401, National general safety technical code for textile products
GB/T 19976, Textiles - Determination of bursting strength - Steel ball method GB/T 19981.2, Textiles - Professional care, dry cleaning and wet cleaning of fabrics and garments - Part 2: Procedure for testing performance when
cleaning and finishing using tetrachloroethene
GB/T 30669, Textiles - Tests colour fastness - Colour fastness to light yellowing
GB/T 31128-2014, Test methods for the resistance to pile loop extraction of towel product
GB 31701, Safety Technical Code for Infants and Children Textile Products GB/T 33729, Textiles - Tests for colour fastness - Cotton rubbing cloth FZ/T 01031-2016, Knitted fabric and elastic woven fabric - Determination of maximum force to seam rupture and elongation - Grab method
FZ/T 30005-2009, Subjective evaluation method of ramie fabric evoked
prickle
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply. 3.1 consumer experience
consumers’ feelings and perceptions when using the product
3.2 characteristic of visual perception
product quality information characteristics perceived by human visual system 3.3 characteristic of tactile perception
product quality information characteristics perceived by human tactile system 5.4 Determination of seam performance of bag cloth. Cut 2 specimens from each sample (take the bottom seam of the pocket, if there is no bottom seam, take the side seam). The length of the specimen shall be parallel to the warp or weft (longitudinal or horizontal) direction of the bag cloth as much as possible. For woven bags, perform according to the method described in GB/T 13773.1. For knitted pockets, perform method B described in FZ/T 01031-2016. Stop the test when the tensile force reaches 150N. Observe the condition of the
specimen. During the test, if the specimen has seam breakage, fabric breakage, stop the test.
5.5 The specimen preparation of the yarn slippage at the seam of the bag cloth is in accordance with the provisions of GB/T 13773.1. Cut 2 specimens from each sample (take the bottom seam of the pocket; if there is no bottom seam, take the side seam). The length of the specimen shall be parallel to the warp or weft direction of the bag cloth as much as possible. The determination
procedure of yarn slippage at the seam of bag cloth shall be implemented according to GB/T 13772.2. The constant load value is 120N. Take the average of the two specimens as the test result.
5.6 The bursting strength of the sock head shall be determined according to the method described in GB/T 19976. The steel ball diameter adopts (25±0.02) mm. Cut out about 60mm of the toe of the sock from the sample as a specimen. Clamp it in the ring holder. Ensure that the toe is tension-free and in the center of the ring holder.
5.7 Determination of staining degree of lotion. Carry out sample preparation and washing according to method A1S described in GB/T 12490-2014. The
detergent adopts ECE phosphorous detergent. After washing, pour the filtered lotion and the lotion of the unwashed specimen into a 25mm diameter
colorimetric tube. Under natural light conditions, place the colorimetric tube in front of white paper that does not contain optical brightener. Evaluate the staining of the lotion according to GB/T 251 within 10min when the lotion is poured into the colorimetric tube.
5.8 The determination of light yellowing resistance is carried out according to the method described in GB/T 30669. Irradiation time is 6h.
5.9 Hand touch method is used to determine the shedding of glitter. Two people shall test independently. Place the sample flat on the inspection table. At (80±5) cm above the table, there is a white light lamp or normal northern light with an illuminance not less than 600lx. Right forearm falls on the table. The test sample is fixed in front of the right wrist. Use a clean and dry right index finger to press naturally on the shiny pink print area of the sample. Rotate the wrist naturally. Rub the pad of the index finger across the length and width of the product 3 times. The distance of each horizontal rubbing is (5±1) cm. Then at a visual distance of about 30cm, check if there is any visible glitter on the finger. Record in accordance with the provisions of GB/T 6529.
A.4 Specimen preparation
Cut two representative specimens from the sample. One set is the warp (or vertical) specimens. The other set is the zonal (or transverse) specimens. Each set of specimens is 3 pieces. The specimen size is not less than
420mm×130mm.
A.5 Test steps
A.5.1 Perform humidity control and balance in the standard atmosphere
specified in A.3. Generally, adjust the humidity for at least 4h.
A.5.2 Set the number of reciprocating friction of the lint tester to 10. Reciprocating speed is 30 times/min.
A.5.3 Spread the suede surface (or rough surface) of the specimen upwards on the sandpaper (see A.2.5) of the specimen table. Fix the specimen with the holder. Remove the floating hair on the surface of the specimen that may affect the test results.
A.5.4 Use grade three water (see A.2.6) to soak the abrasive (see A.2.3). Use a rolling device to adjust the moisture content of the wet abrasive to (100±5)%. A.5.5 Place the wet abrasive on the foam pad (see A.2.4). Put them into the fixed clamp ring of the friction head together. Then tighten it with the bottom plate of the friction head fixture.
A.5.6 Place the friction head with wet abrasive on the specimen. Insert the load shaft. Install a load weight on the upper end of the load shaft.
A.5.7 Start the lint tester to run to the specified number of times and stop. A.5.8 Carefully remove wet abrasive. Prevent the adhered fibers from falling off on the wet abrasive. Rate wet abrasives according to A.6.
A.5.9 Follow the steps in A.5.3~A.5.8 to complete the test of the remaining specimens.
A.6 Rating
A.6.1 When rating, the position of the light source and the abrasive plane shall be kept at 5°~15°. Observation direction is maintained with abrasive plane at (90±10)°. The distance between the eyes and the abrasive for normal vision correction shall be 30cm~50cm, as shown in Figure A.3.
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