ASTM D5587-96(2003)
(Test Method)Standard Test Method for Tearing Strength of Fabrics by Trapezoid Procedure
Standard Test Method for Tearing Strength of Fabrics by Trapezoid Procedure
SCOPE
1.1 This test method covers the measurement of the tearing strength of textile fabrics by the trapezoid procedure using a recording constant-rate-of-extension-type (CRE) tensile testing machine.
1.1.1 The CRE-type tensile testing machine has become the preferred test apparatus for determining trapezoid tearing strength. It is recognized that some constant-rate-of-traverse-type (CRT) tensile testing machines continue to be used. Consequently, these test instruments may be used when agreed upon between the purchaser and the supplier. The conditions for use of the CRT-type tensile tester are included in Appendix X1.
1.2 This test method applies to most fabrics including woven fabrics, air bag fabrics, blankets, napped fabrics, knitted fabrics, layered fabrics, and pile fabrics. The fabrics may be untreated, heavily sized, coated, resin-treated, or otherwise treated. Instructions are provided for testing specimens with or without wetting.
1.3 Tearing strength, as measured in this test method, requires that the tear be initiated before testing. The reported value obtained is not directly related to the force required to initiate or start a tear.
1.4 Two calculations for trapezoid tearing strength are provided: the single-peak force and the average of five highest peak forces.
1.5 The values stated in SI units are to be regarded as the standard. The values stated in inch-pound units may be approximate.
1.6 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.
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Standards Content (Sample)
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 5587 – 96 (Reapproved 2003)
Standard Test Method for
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Tearing Strength of Fabrics by Trapezoid Procedure
This standard is issued under the fixed designation D 5587; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of 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 D 76 Specification for Tensile Testing Machines for Tex-
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tiles
1.1 This test method covers the measurement of the tearing
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D 123 Terminology Relating to Textiles
strength of textile fabrics by the trapezoid procedure using a
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D 629 Test Methods for Quantitative Analysis of Textiles
recording constant-rate-of-extension-type (CRE) tensile testing
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D 1776 Practice for Conditioning Textiles for Testing
machine.
D 2904 Practice for Interlaboratory Testing of a Textile Test
1.1.1 The CRE-type tensile testing machine has become the
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Method That Produces Normally Distributed Data
preferred test apparatus for determining trapezoid tearing
D 2906 Practice for Statements on Precision and Bias for
strength. It is recognized that some constant-rate-of-traverse-
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Textiles
type (CRT) tensile testing machines continue to be used.
D 4848 Terminology of Force, Deformation and Related
Consequently, these test instruments may be used when agreed
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Properties of Textiles
upon between the purchaser and the supplier. The conditions
2.2 ASTM Adjuncts:
for use of the CRT-type tensile tester are included in Appendix
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TEX-PAC
X1.
1.2 This test method applies to most fabrics including
3. Terminology
woven fabrics, air bag fabrics, blankets, napped fabrics, knitted
3.1 Definitions—For definitions of other textile terms used
fabrics, layered fabrics, and pile fabrics. The fabrics may be
in this test method, refer to Terminology D 123. For definitions
untreated, heavily sized, coated, resin-treated, or otherwise
of other terms related to force and deformation in textiles, refer
treated. Instructions are provided for testing specimens with or
to Terminology D 4848.
without wetting.
3.2 Definitions of Terms Specific to This Standard:
1.3 Tearing strength, as measured in this test method,
3.2.1 cross-machine direction, CD, n—the direction in the
requires that the tear be initiated before testing. The reported
plane of the fabric perpendicular to the direction of manufac-
value obtained is not directly related to the force required to
ture.
initiate or start a tear.
3.2.1.1 Discussion—This term is used to refer to the direc-
1.4 Two calculations for trapezoid tearing strength are
tion analogous to coursewise or filling direction in knitted or
provided: the single-peak force and the average of five highest
woven fabrics, respectively.
peak forces.
3.2.2 fabric, in textiles, n—a planar structure consisting of
1.5 The values stated in SI units are to be regarded as the
yarns or fibers.
standard. The values stated in inch-pound units may be
3.2.3 machine direction, MD, n—the direction in the plane
approximate.
of the fabric parallel to the direction of manufacture.
1.6 This standard does not purport to address all of the
3.2.3.1 Discussion—This term is used to refer to the direc-
safety concerns, if any, associated with its use. It is the
tion analogous to walewise or warp direction in knitted or
responsibility of the user of this standard to establish appro-
woven fabrics, respectively.
priate safety and health practices and determine the applica-
3.2.4 peak force, in tear testing of fabrics, n—the maximum
bility of regulatory limitations prior to use.
force required to break one or more yarn components in a
2. Referenced Documents woven or knitted fabric specimen, or break the fiber, the fiber
bonds, or fiber interlocks in other manufactured fabric forms.
2.1 ASTM Standards:
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Annual Book of ASTM Standards, Vol 07.01.
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This test method is under the jurisdiction of ASTM Committee D13 on Textiles Annual Book of ASTM Standards, Vol 07.02.
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and is the direct responsibility of Subcommittee D13.60 on Fabric Test Methods, The PC programs on floppy disks for analyzing Committee D-13 interlabora-
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Specific. tory data are available from ASTM. For a 3 ⁄2-in. disk, request PCN:12-429040-18,
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Current edition approved Feb. 10, 1996. Published April 1996. and for a 5 ⁄4-in. disk, request PCN:12-429041-18.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D 5587 – 96 (2003)
3.2.4.1 Discussion—The peak force may consist of
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