Astm D 3855 – 84 (Reapproved 2000) pdf free download

Standard Test Method for
Rubber Thread—Deterioration Due to Standard Washing
Solution Treatment1

This standard is issued under the fixed designation D 3855; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

1. Scope

1.1 This test method is used to measure the relative deterioration resistance of bare rubber threads subjected to a
standard washing solution when they are dried in the room
temperature and heat aged.

1.2 The results obtained by this test method are only
comparative since it may not be possible to absolutely correlate
such results with an actual service life of the threads or of an
article containing the threads.

1.3 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
only.

1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents

2.1 ASTM Standards:
D 2433 Test Methods for Testing Rubber Thread2
E 145 Specification for Gravity-Convection and ForcedVentilation Ovens3

3. Summary of Test Method

3.1 The initial properties of the thread are determined by the
appropriate test methods in accordance with Test Methods
D 2433. The same test specimens, extended to 100 % elongation, are subjected to one cycle of washing, drying, and
air-oven aging.

3.2 The physical property measured in the test may be any
one of those described in Sections 18 to 37 of Test Methods
D 2433; however, the most suitable is the Schwartz value
(Section 25) or stress retention (Section 35).