ISO 3384 Stress Relaxation Compression of Rubber at Room Temperature

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ISO 3384 specifies two methods 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. Two forms of test piece are permitted: cylindrical test pieces and rings. The use of ring test pieces is particularly suitable for the determination of stress relaxation in liquid environments.