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BS ISO 815-2:2019

BS ISO 815-2:2019

Current

Current

The latest, up-to-date edition.

Rubber, vulcanized or thermoplastic. Determination of compression set At low temperatures

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

11-28-2019

Publisher

British Standards Institution

This document specifies methods for the determination of the compression set characteristics of vulcanized and thermoplastic rubbers at ambient (one method) or elevated temperatures (three methods, A, B, and C, depending on the way the test piece is released at the end of the test).

This document specifies two methods for the determination of the compression set characteristics of vulcanized and thermoplastic rubbers at low temperatures.Method 1 derives from the methodology used in ISO815-1. Method2 uses a specified testing device, allowing to measure and record the test piece thickness during recovery. Due to the load applied during recovery in method 2, no correlation can be established between the results given by both methods. NOTE When rubber is held under compression, physical or chemical changes that prevent the rubber returning to its original dimensions after release of the deforming force can occur. The result is a set, where the magnitude of which depends on the time and temperature of compression as well as on the time, temperature, and conditions of recovery. At low temperatures, changes resulting from the effects of glass hardening or crystallization become predominant and, since these effects are reversed by raising the temperature, therefore, the measurements are always taken at the test temperature.

Committee
PRI/22
DocumentType
Standard
ISBN
9780539002065
Pages
30
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
ISO 815-2:2019 Identical

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Hardcopy - English
PDF - English
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