GB/T 12832-2008 (English Version) PDF

Standard No.: GB/T 12832-2008
Language: Chinese, Available in English version
Release Date: 2008
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 12832-2008
Replace: GB/T 12832-1991

Scope: This standard specifies the hardness measurement method to determine the effect of rubber hardening with time due to crystallization. It is limited to materials with an initial hardness of 10 IRHD to 85 IRHD at the test temperature. This standard applies to the determination of raw rubber, unvulcanized (mixed) rubber and vulcanized rubber. It is mainly suitable for rubbers that have a clear tendency to crystallize at low temperatures, such as neoprene and natural rubber. This standard does not apply to rapidly crystallizing materials that achieve a relatively high degree of crystallinity within 15 minutes of conditioning at the test temperature.

GB/T 12832-2008 Referenced Document

GB/T 2941 Rubber. General procedures for preparing and conditioning test pieces for physical test methods
GB/T 6031-1998 Rubber, Vulcanized or thermoplastic--Determination of hardness (hardness between 10 IRHD and 100IRHD)

2008 GB/T 12832-2008 Rubber.Determination of crystallization effects by hardness measurements
1991 GB/T 12832-1991 Rubbers--Determination of crystallization effects by hardness measurements