ISO 3384-1:2019 PDF

Scope: This document specifies two procedures for determining the decrease in counterforce exerted by a test piece of vulcanized or thermoplastic rubber which has been compressed to a constant deformation and maintained thus at a predetermined test temperature. The counterforce can be determined either by means of a continuous-measurement system or by a discontinuous-measurement one. Two test methods are specified, method A and method B. In method A the compression and all measurements of counterforce are made at test temperature and in method B the compression and all measurements of counterforce are made at standard laboratory temperature. Method A and method B do not give the same results, as in method B the shrinkage of the material from the test temperature to standard laboratory temperature is included in the result. Two forms of test piece are specified in this document: cylindrical test pieces and rings. Comparison of results is valid only when made on test pieces of similar size and shape. The use of ring test pieces is particularly suitable for the determination of stress relaxation in liquid environments. This document deals only with testing at constant ambient or elevated temperature. Testing at temperatures below standard laboratory temperature is not specified. The methods have been used for low-temperature testing, but their reliability under these conditions is not proven.

ISO 3384-1:2019 Referenced Document

ISO 18899:2013 Rubber - Guide to the calibration of test equipment
ISO 188:2011 Rubber, vulcanized or thermoplastic - Accelerated ageing and heat resistance tests
ISO 23529:2016 Rubber - General procedures for preparing and conditioning test pieces for physical test methods
ISO 37:2017 Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties

2024 ISO 3384-1:2024 Rubber, vulcanized or thermoplastic
2019 ISO 3384-1:2019 Rubber, vulcanized or thermoplastic — Determination of stress relaxation in compression — Part 1: Testing at constant temperature
2013 ISO 3384-1:2011/Amd 1:2013 Rubber, vulcanized or thermoplastic - Determination of stress relaxation in compression - Part 1: Testing at constant temperature - Amendment 1: Revised calibration schedule
2011 ISO 3384-1:2011 Rubber, vulcanized or thermoplastic - Determination of stress relaxation in compression - Part 1: Testing at constant temperature