Rubber, vulcanized - Determination of compression set at constant strain
1 Scope
This standard specifies the test method for determining the compression set of vulcanized rubber at constant strain.
This standard is applicable to evaluate the capability of vulcanized rubber of keeping its elasticity after continuous compression at specified temperature and compression rate.
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 2941-2006 Rubber - General procedures for preparing and conditioning test pieces for physical test methods
GB/T 3512-2014 Rubber, vulcanized or thermoplastic - Accelerated aging and heat resistance tests - Air-oven method
GB/T 7759.1-2015 Rubber, vulcanized or thermoplastic - Determination of compression set - Part 1: At ambient or elevated temperatures
3 Principle
In this test, the is compression set rate of the vulcanized rubber specimen is determined by compressing the specimen to a specified height and then keeping it at certain temperature for certain time, or infiltrating by medium.
4 Test devices
4.1 Test fixtures
4.1.1 The test fixtures shall include compression plates, limiters and fasteners. See Figure 1 for typical test fixtures.
