1 Scope
This standard specifies accelerated ageing or heat resistance tests on vulcanized or thermoplastic rubbers. Two methods are given:
Method A: air-oven method using a cell-type oven or cabinet oven with low air speed and a ventilation of 3 to 10 changes per hour;
Method B: air-oven method using a cabinet oven with forced air circulation by means of a fan and a ventilation of 3 to 10 changes per hour.
2 Normative References
The following documents for the application of this document are essential. For dated reference, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 25269-2010 Rubber - Guide to the Calibration of Test Equipment (ISO 18899:2004, IDT)
ISO 37 Rubber, Vulcanized or Thermoplastic - Determination of Tensile Stress-Strain Properties
ISO 48 Rubber, Vulcanized or Thermoplastic - Determination of Hardness (Hardness between 10 IRHD and 100 IRHD)
ISO 23529 Rubber - General Procedures for Preparing and Conditioning Test Pieces for Physical Test Methods
3 Principle
3.1 General
Foreword I
Introduction II
1 Scope
2 Normative References
3 Principle
4 Apparatus
5 Calibration
6 Test Pieces
7 Time Interval Between Vulcanization and Testing
8 Ageing Conditions (Duration and Temperature)
9 Procedure
10 Expression of Results
11 Precision
12 Test Report
Appendix A (Informative) Determination of the Air Speed in Ovens with Forced Air Circulation
Appendix B (Informative) Precision
Appendix C (Informative) Guidance for Using Precision Results
Appendix D (Normative) Calibration Schedule
Bibliography
