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GB/T 38046-2019 PDF in English


GB/T 38046-2019 (GB/T38046-2019, GBT 38046-2019, GBT38046-2019)
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GB/T 38046-2019: PDF in English (GBT 38046-2019)

GB/T 38046-2019 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 03.220.20 T 09 Reflective vest for motor vehicle passengers ISSUED ON: OCTOBER 18, 2019 IMPLEMENTED ON: MAY 01, 2020 Issued by: State Administration for Market Regulation of the People's Republic of China; Standardization Administration of the People's Republic of China. Table of Contents Foreword ... 3  1 Scope ... 4  2 Normative references ... 4  3 Terms and definitions ... 5  4 Technical requirements ... 5  5 Test methods ... 9  6 Inspection rules ... 12  7 Placement requirements ... 13  8 Marks, packaging, storage and transport ... 13  Annex A (normative) Retroreflective material arrangement of reflective vest . 15  Bibliography ... 16  Reflective vest for motor vehicle passengers 1 Scope This Standard specifies technical requirements, test methods, inspection rules, placement requirements, marks, packaging, storage and transport of reflective vest for motor vehicle passengers. This Standard is applicable to design, manufacture and inspection of reflective vest for motor vehicle passengers. This Standard is not applicable to high-visibility warning apparel for other occupations. 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 2423.1, Environmental testing - Part 2: Test methods - Tests A: Cold GB/T 2423.2, Environmental testing - Part 2: Test methods - Tests B: Dry heat GB/T 3920, Textiles - Tests for colour fastness - Colour fastness to rubbing GB/T 3922, Textiles - Testing method for colour fastness to perspiration GB/T 3923.1, Textiles - Tensile properties of fabrics - Part 1: Determination of maximum force and elongation at maximum force using the strip method GB/T 3978, Standard illuminants and geometric conditions GB/T 3979-2008, Methods for the measurement of object color GB/T 4669-2008, Textiles - Woven fabrics - Determination of mass per unit length and mass per unit area GB/T 7742.1, Textiles - sting properties of fabrics - hydraulic method for determination of bursting strength and bursting distension GB 8410-2006, Flammability of automotive interior materials GB/T 8427-2008, Textiles - Tests for color fastness - Color fastness to artificial light: Xenon arc fading lamp test GB/T 8628-2013, Textiles - Preparation, Marking and Measuring of Fabric Specimens and Garments in Tests for Determination of Dimensional Change GB/T 8629, 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 18401-2010, National general safety technical code for textile products GB/T 18833-2012, Retroreflective sheeting for traffic control GB 20653-2006, High-visibility warning clothing for professional use 3 Terms and definitions For the purposes of this document, the terms and definitions defined in GB/T 18833 and GB 20653 as well as the followings apply. 3.1 reflective vest for motor vehicle passengers Apparel that is for vehicle occupants, that has high visibility and warning function 4 Technical requirements 4.1 General requirements 4.1.1 Appearance quality The reflective vest for motor vehicle passengers (hereinafter referred to as “reflective vest”) shall be clean, without damage or iron-finishing. There shall be no thread-loosening thread-disconnection, thread-jumping in the sewing part. The vest shall be flat, consistent in width, without arching. 4.1.2 Pattern materials shall be less than or equal to 100mm/min. 5 Test methods 5.1 General requirements 5.1.1 Appearance quality In an environment that the illumination is not less than 150lx, place the reflective vest flat on the test bench. Within a distance of 1m, face the reflective vest and visually inspect it. 5.1.2 Pattern Visually inspect the appearance according to the 5.1.1 method. Use a measuring tool of which the accuracy is not less than 1mm to measure the bust of the finished vest (measure one cycle parallel to the position of the chest of the reflective vest), the vest length (the length from the top to the bottom of the reflective vest) and the width and length of the retroreflective material. Calculate the total use area of the retroreflective material. 5.1.3 Manufacture Visually inspect the appearance according to the 5.1.1 method. Use a measuring tool of which the accuracy is not less than 1mm to measure the distance from the seam to the edge of the retroreflective material. 5.1.4 Safety According to the requirements in 6.1, 6.2 of GB 18401-2010, conduct the tests of pH value and formaldehyde content. Use artificial olfaction to check the smell of the reflective vest. 5.2 Material performance 5.2.1 Fluorescent material 5.2.1.1 Color The test uses D65 standard illuminator, 45°a:0° geometry and 2° field of view that are specified in GB/T 3978. Conduct the test according to the 5.1 provisions in GB/T 3979-2008. 5.2.1.2 Color fastness to light Conduct the test according to Method 3 in 7.2.4 of GB/T 8427-2008. When the No. 4 blue control standard sample becomes level 4, test the sample color Annex D of GB 20653-2006. 5.2.2.2.2 Test procedures The test procedures are as follows: a) Cut a 50mm × 150mm retroreflective material sample. Fix it on the equipment sample rack; b) Adjust water pressure to make water flow at 200 × (1 ± 5%) mL/min. Conduct the simulated rain test to the sample; c) The test time is not less than 3min; d) In the simulated rain state, test the retroreflective coefficient of the retroreflective material at an incident angle of 5° and an observation angle of 12'. 5.2.2.3 Retroreflection coefficient after physical test According to the methods in 7.4 of GB 20653-2006, respectively conduct the abrasion resistance, flexing, low temperature bending, water washing (20 times) tests to the retroreflective material. After the tests, check the sample and re-test the retroreflection coefficient. 5.2.2.4 Solvent resistance performance Cut 3 pieces of 50mm × 150mm retroreflective material samples. Respectively wipe 92# unleaded petrol, 0# diesel and SAE20 lubricant on 3 samples. Wipe back and forth 10 times on each piece of sample. Then use clean cotton cloths or cotton balls to wipe the samples clean. After they are recovered at room temperature for 1h, check the sample and re-test the retroreflection coefficient. 5.3 Finished vest performances 5.3.1 Temperature resistance test 5.3.1.1 Test equipment The test equipment shall meet the requirements of GB/T 2423.1 and GB/T 2423.2. 5.3.1.2 Test methods Place the reflective vest in packaging state into a test box. Place it at a temperature of 70°C ± 2°C for 15.5h. After adjusting the test box temperature to 22°C ± 2°C, place for 0.5g. Then adjust the test box temperature to -30°C ± 2°C, place for 7.5g. Conduct the test continuously for 3 cycles. After the test, check the appearance of the reflective vest and re-test the retroreflection coefficient of retroreflective material. 5.3.2 Flame retardant test Conduct the test according to the method in Clause 4 of GB 8410-2006. 6 Inspection rules 6.1 Inspection type The inspection for the reflective vest is divided into type inspection and exit- factory inspection. 6.2 Type inspection 6.2.1 The inspection application Usually, the type inspection should be conducted in one of the following cases for the reflective vest: a) test stereotypes identification of new product or old product conversion production; b) after the formal production, for example, when the raw material, production process, production equipment has significant changes that may affect product performance; c) when production is resumed after the production has been discontinued for more than one year; d) when the results of the exit-factory inspection and the type inspection are quite different; f) when the purchaser or national market supervision and management department requires to carry out the type inspection. 6.2.2 Inspection items, methods and determination Conduct the type inspection according to the test items and methods specified in Clause 5. If one test item fails to meet the requirements in Clause 4, the type inspection for this reflective vest shall be rejected. 6.3 Exit-factory inspection 6.3.1 Inspection items and methods Before each batch of reflective vest exit the factory, conduct the inspection according to the requirements in Table 5. Select the exit-factory inspection ......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.