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GB/T 39294-2020: Determination of the discoloration performance for adhesive
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 39294-2020 | English | 149 |
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Determination of the discoloration performance for adhesive
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GB/T 39294-2020
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Basic data | Standard ID | GB/T 39294-2020 (GB/T39294-2020) | | Description (Translated English) | Determination of the discoloration performance for adhesive | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G38 | | Classification of International Standard | 83.180 | | Word Count Estimation | 8,858 | | Date of Issue | 2020-11-19 | | Date of Implementation | 2021-10-01 | | Regulation (derived from) | National Standard Announcement No. 26 of 2020 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 39294-2020: Determination of the discoloration performance for adhesive---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.
Determination of the discoloration performence for adhesive
ICS 83.180
G38
National Standards of People's Republic of China
Determination of adhesive discoloration (yellowing) performance
2020-11-19 released
2021-10-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the China Petroleum and Chemical Industry Federation.
This standard is under the jurisdiction of the National Adhesive Standardization Technical Committee (SAC/TC185).
Drafting organizations of this standard. Zhongke Huayu (Fujian) Technology Development Co., Ltd., Guangdong Yutian Bali Technology Co., Ltd., Fujian Huafeng
New Materials Co., Ltd., Shanghai Rubber Products Research Institute Co., Ltd., Shenzhen Beitest Testing Technology Co., Ltd., Xiamen Zhongxunde Testing Technology
Co., Ltd., Guangzhou Institute of Synthetic Materials Co., Ltd., Fujian Institute of Material Structure, Chinese Academy of Sciences, Putian University, Putian Haixi Shoes Industry
Information Center, Taixing Jinyuan Fine Chemical Co., Ltd., Fujian Product Quality Inspection Institute.
The main drafters of this standard. Xu Yanqi, Lin Huayu, Fang Huayu, Zhang Jianqing, Zhou Yehua, Lin Yi, Peng Mei, Yi Jun, Xu Ying, Huang Deyi, Chen Jianfeng,
Tang Zhaoyun, Li Jie.
Determination of adhesive discoloration (yellowing) performance
1 Scope
This standard specifies the method for measuring the discoloration (yellowing) performance of adhesives.
This standard applies to the qualitative and quantitative determination of discoloration (yellowing) properties of adhesives.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document.
For undated references, the latest version (including all amendments) applies to this document.
GB/T 250 Gray Scale for Textile Color Fastness Test Evaluation
GB/T 2943 Adhesive Terms
GB/T 10335.3 Coated paper and cardboard coated white cardboard
GB 11614 flat glass
GB/T 19258 UV germicidal lamp
3 Terms and definitions
The following terms and definitions defined in GB/T 2943 apply to this document.
3.1
Three eigenvalues of color
Each color has a corresponding position in its color space coordinate system. Describe the position of a color in its color space coordinate system
Three parameters set.
Note. The three eigenvalues of colors vary according to different color models. This standard uses the Lab color model (Figure 1), using L*, a* and b* to represent the three characteristics of the color.
Levy. among them.
L* represents brightness, and the value range is [0,100]. The larger the L* value, the higher the brightness. When L* is 0, it represents black, and when it is 100, it represents white.
a* represents the position from green to red, the value range is [-128,127], a* changes from a negative value to a positive value, and the corresponding color changes from green to red.
b* represents the position from blue to yellow, the value range is [-128,127], b* changes from a negative value to a positive value, and the corresponding color changes from blue to yellow.
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