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ASTM D 1004 Document Information:
Title
Standard Test Method for Tear Resistance (Graves Tear) of Plastic Film and Sheeting
ASTM International
Publication Date:
Apr 1, 2007
Scope:
This test method2 covers the determination of the
tear resistance of flexible plastic film and sheeting at very low
rates of loading, 51 mm [2 in.]/min. and is designed to measure the
force to initiate tearing. The specimen geometry of this test
method produces a stress concentration in a small area of the
specimen. The maximum stress, usually found near the onset of
tearing, is recorded as the tear resistance in newtons [or
pounds-force]. The method is not applicable for film or sheeting
material where brittle failures occur during testing or where
maximum extension is greater than 101.6 mm [4 in.].
NOTE 1—Film has been arbitrarily defined as sheeting having
nominal thickness not greater than 0.25 mm [0.010 in.].
Constant-Rate-of-Grip Separation Test—This test method
employs a constant rate of separation of the grips holding the test
specimen.
Specimen extension may be measured in this test method by grip
separation.
The values stated in SI units are to be regarded as the
standard. The values given in brackets are provided for information
only.
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.
NOTE 2—There is no similar or equivalent ISO standard.
*A Summary of Changes section appears at the end of this
standard.
2 The following reference may be of interest in
connection with this test method: Graves, F. L., "The Evaluation of
Tear Resistance in Elastomers," India Rubber World, Vol
111, No. 3, December 1944, pp. 305–308.
Keywords:
- Graves
- plastic film
- tear
- tear initiation
- thin sheeting
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