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GB/T 42279-2022: Rubber, vulcanized or thermoplastic - Determination of tension set under constant elongation, and of tension set, elongation and creep under constant tensile load
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GB/T 42279-2022: Rubber, vulcanized or thermoplastic - Determination of tension set under constant elongation, and of tension set, elongation and creep under constant tensile load

---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.
ICS 83.060 CCSG40 National Standards of People's Republic of China vulcanized rubber or thermoplastic rubber at constant elongation Determination of tensile set and under constant tensile load Determination of tensile set, elongation and creep (ISO 2285.2019, IDT) Posted on 2022-12-30 2023-04-01 Implementation 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. This document is equivalent to ISO 2285.2019 "Determination of tensile permanent deformation and Determination of Tensile Set, Elongation, and Creep Under Constant Tensile Load". 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 Petroleum and Chemical Industry Federation. This document is sponsored by the General Test Method Subcommittee of National Rubber and Rubber Products Standardization Technical Committee (SAC/TC35/SC2) Focus on. This document is drafted by. Gotwell Scientific Instrument (Qingdao) Co., Ltd., Northwest Rubber and Plastic Research and Design Institute Co., Ltd., Hangzhou Chao Yang Rubber Co., Ltd., Guangzhou Synthetic Materials Research Institute Co., Ltd., Shandong Linglong Tire Co., Ltd., Double Star Group Co., Ltd., Triangle Tire Co., Ltd., Guizhou Tire Co., Ltd., Sailun (Dongying) Tire Co., Ltd., Jiangsu Mingzhu Testing Machinery Co., Ltd. Co., Ltd., Shandong Yanggu Huatai Chemical Co., Ltd., Beijing Rubber Industry Research and Design Institute Co., Ltd. The main drafters of this document. Yu Long, Song Yating, Gao Yun, Wu Xinguo, Xu Xinjian, Wang Xianning, Liu Xiaodan, Yan Shangkai, Lu Bo, Zhang Lijie, Guo Fei, Xiao Maoyan, Ni Shujie, Hou Jingbin, Yin Zhi, Feng Ping, Gao Lei, Li Xiaoyu, Bao Dafei, Li Yunfeng, Shi Lilong, Xie Junfang, Sun Siwen. vulcanized rubber or thermoplastic rubber at constant elongation Determination of tensile set and under constant tensile load Determination of tensile set, elongation and creep Caution 1 --- Personnel using this document should have practical experience in formal laboratory work. This document does not indicate all possible safety question. It is the user's responsibility to take appropriate safety and health measures and ensure compliance with the conditions stipulated in the relevant national laws and regulations. Warning 2 --- Some of the steps specified in this document may involve the use or generation of certain wastes, which may cause harm to the local environment. Appropriate safe handling and post-use disposal of waste should be specified in relevant documents.

1 Scope

This document describes the determination of vulcanized or thermoplastic rubber in a relatively short period of time under constant elongation or constant load. Various methods by which a specimen changes size during and after tensile loading. The constant elongation test is used to determine the ability of rubber to maintain its elasticity after being stretched. Stretch rubber to specification at standard laboratory temperature Set the strain, and maintain the strain at the same temperature or a specified higher temperature for a specified time, and then at the test temperature or standard laboratory temperature Lower to relieve the strain. The constant load test specifies the measurement of elongation, creep and tensile permanent deformation of rubber after being subjected to a constant load at standard laboratory temperature. try method. This document is applicable to the measurement of the elastic properties of rubber with a hardness ranging from 20IRHD to 94IRHD. The creep measurement method described in this document is not suitable for product design and evaluation of low creep materials. For such tests, you should use ISO 8013.The test results of this test are not comparable to the ISO 8013 test results. Note. The constant load test is mainly used to measure the vulcanization state and quality control of thin-walled products. Increase in vulcanization state or degree of cross-linking usually manifests as permanent Deformation, creep and reduction in elongation.

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. ISO 188 Hot air accelerated aging and heat resistance test of vulcanized rubber or thermoplastic rubber (Rubber, vulcanizedorthermo- Note. GB/T 3512-2014 vulcanized rubber or thermoplastic rubber hot air accelerated aging and heat resistance test (ISO 188.2011, IDT) ISO 8013 Determination of creep of vulcanized rubber under compression or shear (Rubber, vulcanized-Determination of Note. GB/T 19242-2003 Determination of creep of vulcanized rubber under compression or shear (ISO 8013.1988, MOD) Note. GB/T 25269-2010 Guidelines for Calibration of Rubber Test Equipment (ISO 18899.2004, IDT) ISO 23529.2016 Rubber physical test methods Specimen preparation and general adjustment procedures (Rubber-General procedures Note. GB/T 2941-2006 Rubber Physical Test Methods Specimen Preparation and Adjustment General Procedures (ISO 23529.2004, IDT) ...