GB/T 7762-2014: Rubber, vulcanized or thermoplastic -- Resistance to ozone cracking -- Static strain test

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Scope

This Standard specifies procedures intended for use in estimating the resistance of
vulcanized or thermoplastic rubbers to cracking when exposed, under static tensile
strain, to air containing a definite concentration of ozone and at a definite temperature
in circumstances that exclude the effects of direct light.
This Standard applies to rubber, vulcanized or thermoplastic.
NOTE Great caution is necessary in attempting to relate standard test results to service
performance since the relative ozone resistance of different rubbers can vary markedly
depending on the conditions, especially ozone concentration and temperature. In addition, tests
are carried out on thin test pieces deformed in tension and the significance of attach for articles
in service can be quite different owing to the effects of size and of type and magnitude of the
deformation. Explanatory notes on the natural ageing under ozone cracking are given in Annex
A.

Basic Data

Standard ID	GB/T 7762-2014 (GB/T7762-2014)
Description (Translated English)	Rubber, vulcanized or thermoplastic -- Resistance to ozone cracking -- Static strain test
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G40
Classification of International Standard	83.060
Word Count Estimation	15,188
Date of Issue	12/22/2014
Date of Implementation	6/1/2015
Older Standard (superseded by this standard)	GB/T 7762-2003
Quoted Standard	GB/T 528-2009; GB/T 2941-2006; GB/T 11206-2009; ISO 1431-3
Adopted Standard	ISO 1431-1-2004, NEQ
Regulation (derived from)	National Standards Bulletin 2014 No. 30
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This Standard specifies vulcanized or thermoplastic rubber in the static tensile strain, is exposed to a certain concentration of ozone in the air and at a predetermined temperature and non-ozone-cracking test environment directly affect the light conduct