GB/T 41793-2022 English PDF (GBT41793-2022)

Delivery: 3 seconds. Download true-PDF + Invoice.
Get Quotation: Click GB/T 41793-2022 (Self-service in 1-minute)
Historical versions (Master-website): GB/T 41793-2022
Preview True-PDF (Reload/Scroll-down if blank)

GB/T 41793-2022: Test method of artificial leather and synthetic leather - Determination of the potential to phenolic yellowing
GB/T 41793-2022 English name.Test method of artificial leather and synthetic leather - Determination of the potential to phenolic yellowing
ICS 59.080.40
CCSY47
National Standards of People's Republic of China
Test method for artificial leather and synthetic leather
Determination of potential phenol yellowing
State Administration for Market Regulation
Released by the National Standardization Management Committee
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents"
drafting.
Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by China National Light Industry Council.
This document is under the jurisdiction of the National Plastic Products Standardization Technical Committee (SAC/TC48).
This document is drafted by. Zhejiang Deep Blue New Material Technology Co., Ltd., Jieshou Juyi Packaging Material Co., Ltd., Hefei Ketian Water-based Water
Sex Technology Co., Ltd., Fujian Baolit Technology Co., Ltd., Zhejiang Hexin New Material Co., Ltd., Anhui Anli Material Technology Co., Ltd.
Co., Ltd., Qingyuan Qili Synthetic Leather Co., Ltd., Shanghai Huafeng Microfiber Technology Co., Ltd., Kunshan Achilles New Material Technology
Co., Ltd., Nanya Plastic Industry (Nantong) Co., Ltd., Foshan Weishida New Material Co., Ltd., Zhejiang Huafeng Synthetic Resin Co., Ltd., An
An (China) Co., Ltd., Jiangsu Ruigao New Materials Co., Ltd., Mingxin Xuteng (Jiangsu) Innovation Research Institute Co., Ltd., Chancheng, Foshan City
District Quality Technology Association, Zhejiang Meisheng New Material Co., Ltd., Yangzhou Deyun Plastic Technology Co., Ltd., Tianshou (Fujian) Microfiber Technology
Co., Ltd., Jiangsu Best Decoration New Material Co., Ltd., Suzhou Ai Chibot Testing Technology Co., Ltd., Zhejiang Heli New Material Co., Ltd.
Co., Ltd., Shandong Tongda Island New Material Co., Ltd., Fujian Huaxia Synthetic Leather Co., Ltd., Dongguan Zhongbiao Technology Co., Ltd., Shanghai
Maicai New Material Co., Ltd., Liming Vocational University.
The main drafters of this document. Li Xiangyu, Wang Yaoming, Dai Wenqi, Zhu Jianqin, Shen Huan, Ma Yifeng, Zhu Youkui, Chen Bingqi, Xu Yishan,
Liang Xiaochang, Liu Juan, Luo Zhiqing, Wang Xiaojing, Zhao Jianming, Li Zhiyuan, Su Hongwei, Jin Meijin, Chen Zhihua, Fan Xuefu, Zhuang Junxin, Fu Weixia, Qian Neng,
Liu Chuanqing, Zhou Wenzhi, Kuang Jianwu, Jiang Pu, Wang Zhongjian, Xu Xuri, Wang Zhang, Zheng Fengqiong, Shi Yilei, Wang Jingyi.
Test method for artificial leather and synthetic leather
Determination of potential phenol yellowing
1 Scope
This document describes the test method for determining the potential phenolic yellowing of artificial leather and synthetic leather.
This document is applicable to the determination of potential phenol yellowing of artificial leather and synthetic leather.
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document.
GB/T 251 Gray sample card for color fastness test of textiles for staining evaluation
GB/T 29778-2013 Assessment of potential phenol yellowing in textile color fastness tests
GB/T 30435 Electric drying oven and electric blast drying oven
QB/T 5160-2017 Test method for artificial leather and synthetic leather Color measurement method
3 Terms and Definitions
The following terms and definitions apply to this document.
4 principles
Each sample and standard control cloth were clamped in test paper containing 2,6-di-tert-butyl-4-nitrophenol, placed between different glass plates and
Stack them together, wrap them tightly with a polyethylene film free of phenolic compounds to form a sandwich composite sample, and place them under specified pressure.
certain time in the oven. Evaluate the yellowing grade of the sample with the gray scale card for staining evaluation, so as to evaluate the possibility of phenol yellowing of the sample.
Note. The phenolic compounds in this document mainly refer to 2,6-di-tert-butyl-4-methylphenol, and the reaction of 2,6-di-tert-butyl-4-methylphenol with nitrogen oxides can produce
Into 2,6-di-tert-butyl-4-nitrophenol.
5 Sample preparation
5.1 Specimen size
Cut out a sample with a length of (100±1)mm and a width of (30±1)mm.
Note. For special samples, the shape and specification of the sample can be determined according to the actual application.
5.2 Number of samples
Select at least one sample each time, or sample according to the negotiation between relevant parties.
6 Test equipment
6.1 Oven
It meets the requirements of GB/T 30435 and can keep the test temperature within the range of (50±2)℃.
6.2 Test stand
It consists of a pair of stainless steel racks and weights. The mass of the weight is (5.0±0.1) kg, and the bottom size is at least (115±1)mm×(60±1)mm.
Structure shown in Figure 1.The structure of the test device should be such that after the weight is removed during the test, the pressure on the sample remains unchanged.
6.3 Standard multi-light source color matching box
Comply with the provisions of 4.3.2.1 in QB/T 5160-2017.
7 Test materials
7.1 Test strips
Comply with the provisions of 7.1 in GB/T 29778-2013.
7.2 Standard control cloth
Comply with the provisions of 7.2 in GB/T 29778-2013.
7.3 Polyethylene film
Polyethylene film free of phenolic compounds, with a thickness of (63±10) μm and a size not smaller than (400±5) mm×(200±5) mm.
7.4 Glass plate
The surface is clean and pollution-free, and the size is (100±1)mm×(40±1)mm×(3±0.5)mm.
7.5 Gray scale for assessing staining
Comply with the provisions of GB/T 251.
8 Test steps
8.1 Take 7 glass plates, up to 6 pieces of test paper, up to 5 samples and 1 piece of standard control cloth.
Note. If you wear protective gloves to operate, choose gloves that do not contain phenolic compounds.
8.2 Fold the test paper in half along the center line, sandwich each sample and the standard control cloth in the middle of the test paper to form a maximum of 6 sandwich composite samples, and then separately
Placed between two glass plates, each combined sample is separated by a glass plate, as shown in Figure 2.When the sample to be tested is less than 5 pieces, still need
7 glass panels and 1 standard control cloth.
Description of index number.
1---7 glass plates;
2---up to 5 samples;
3---Up to 6 test strips;
4---1 piece of standard control cloth.
Fig.2 Schematic diagram of sandwich composite sample
8.3 Fold the glass plate, test paper, sample and standard control cloth, seal and wrap it tightly with polyethylene film, and then fix it with tape to make a sandwich combination
sample.
8.4 Place the sealed sandwich composite sample in the test rack, and add a load of (5.0±0.1)kg. Tighten the screws to fix the position of the pressure plate
After that, remove the load.
8.5 Put the test rack with the sandwich composite sample into the oven, and place it at a temperature of (50±2)°C for (16±0.25)h.
8.6 Take out the test frame and sandwich composite sample from the oven, and cool to room temperature.
8.7 Open the sandwich composite sample, take out the sample and the standard control cloth, and complete the evaluation of each sample within 30min.
9 Test results
9.1 Visually observe directly in the standard multi-light source color box, and compare the surface of the standard control cloth and the sample leather with their original samples using the gray sample card.
There is no need to deduct the background color when comparing, and the level with the closest color difference is taken as the respective phenol yellowing series. Level 5 is the smallest, phenol yellowing phenomenon
The weakest; grade 1 is the largest, and the phenomenon of phenol yellowing is the most serious.
9.2 If the grade of phenol yellowing of the standard control cloth is less than or equal to grade 3, the test is valid; otherwise, the entire sandwich composite sample should be retested.
test. If the test is repeated and the test result of the standard control cloth is still greater than grade 3, it is considered that the test paper is invalid, and it is necessary to use a different batch of test paper to test again.
test.
9.3 If the sample shows uneven yellowing or macula, the sample should be retested.
10 Test report
The test report should include the following.
a) the number of this document;
b) source of sample;
c) test method;
d) test results;
e) yellowing grade;
f) Test date.