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Norm

ISO 815-1:2008

Issue date: 2008 01 28

Rubber, vulcanized or thermoplastic — Determination of compression set — Part 1: At ambient or elevated temperatures

ISO 815-1:2008 specifies methods for the determination of the compression set characteristics of vulcanized and thermoplastic rubbers at ambient or elevated temperatures....
Withdrawn: 2014 08 20
Publisher:
International Organization for Standardization
Format:
Digital | 10 Pages
Language:
English
Currently valid:

ISO 815-1:2008 specifies methods for the determination of the compression set characteristics of vulcanized and thermoplastic rubbers at ambient or elevated temperatures.

The methods are intended to measure the ability of rubbers of hardness within the range 10 IRHD to 95 IRHD to retain their elastic properties at specified temperatures after prolonged compression at constant strain (normally 25 %) under one of the alternative sets of conditions described. For rubber of nominal hardness 80 IRHD and above, a lower compression strain is used: 15 % for a nominal hardness from 80 IRHD to 89 IRHD and 10 % for a nominal hardness from 90 IRHD to 95 IRHD.

NOTE 1 When rubber is held under compression, physical or chemical changes can occur that prevent the rubber returning to its original dimensions after release of the deforming force. The result is a set the magnitude of which depends on the time and temperature of compression as well as on the time and temperature of recovery. At elevated temperatures, chemical changes become increasingly more important and lead to a permanent set.

NOTE 2 Short-time compression set tests, typically for 22 h, at elevated temperatures are commonly used as a measure of the state of cure, a means of material classification and a specification to ensure the quality of a compound. Longer tests, typically for 1 000 h, at elevated temperatures take account of the effect of ageing and are often used to predict service performance, including that of sealing materials. Short-time tests at ambient temperature show mainly the effect of physical changes (re-orientation of the molecular chains and the fillers).

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2019 11 26
Rubber, vulcanized or thermoplastic — Determination of compression set — Part 1: At ambient or eleva...
Norm
ISO 815-1:2014
2014 08 20
Rubber, vulcanized or thermoplastic — Determination of compression set — Part 1: At ambient or eleva...
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ISO 815-1:2008
2008 01 28
Rubber, vulcanized or thermoplastic — Determination of compression set — Part 1: At ambient or eleva...
Norm
ISO 815:1991/Cor 1:1993
1993 04 01
Rubber, vulcanized or thermoplastic — Determination of compression set at ambient, elevated or low t...
Norm
ISO 815:1991
1991 10 31
Rubber, vulcanized or thermoplastic — Determination of compression set at ambient, elevated or low t...
Norm
ISO 1653:1975
1975 03 01
Vulcanized rubbers — Determination of compression set under constant deflection at low temperatures
Norm
ISO 815:1972
1972 10 01
Vulcanized rubbers — Determination of compression set under constant deflection at normal and high t...
Norm
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Norm
ISO 815-1:2014
Issue date : 2014 08 20
Rubber, vulcanized or thermoplastic — Determination of compression set — Part 1: At ambient or elevated temperatures