ASTM D5734-95(2001)
(Test Method)Standard Test Method for Tearing Strength of Nonwoven Fabrics by Falling-Pendulum (Elmendorf) Apparatus (Withdrawn 2008)
Standard Test Method for Tearing Strength of Nonwoven Fabrics by Falling-Pendulum (Elmendorf) Apparatus (Withdrawn 2008)
SCOPE
1.1 This test method covers the measurement of the average force required to propagate a single-rip tear starting from a cut in a nonwoven fabric using a falling-pendulum (Elmendorf) apparatus.
1.2 This standard Elmendorf tear tester with interchangeable pendulums has become the preferred test apparatus for determining tearing strength up to 6400 grams-force. It is recognized that some older test instruments with augmenting weights continue to be used. As a consequence, these older test instruments may be used when agreed upon between the purchaser and the supplier. The conditions for the older units as used with this test method are included in the appendix. For tearing strength above 6400 grams-force, a high-capacity test instrument is available equipped with augmenting weights to increase the capacity.
1.3 This test method is applicable to most nonwoven fabrics that are treated or untreated, including heavily sized, coated, or resin-treated, provided the fabric does not tear in the direction crosswise to the direction of the force applied during the test. If the tear does not occur in the direction of the test, the fabric is considered untearable in that direction by this test method.
1.4 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses may be approximate.
1.5 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.
WITHDRAWN RATIONALE
This test method covers the measurement of the average force required to propagate a single-rip tear starting from a cut in a nonwoven fabric using a falling-pendulum (Elmendorf) apparatus.
This standard is being withdrawn with no replacement because D13 no longer has the technical expertise to maintain.
Formerly under the jurisdiction of ASTM Committee D13 on Textiles, this test method was withdrawn in October 2008.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D5734–95 (Reapproved 2001)
Standard Test Method for
Tearing Strength of Nonwoven Fabrics by Falling-Pendulum
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(Elmendorf) Apparatus
This standard is issued under the fixed designation D 5734; 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 4848 Terminology of Force and Deformation Properties
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of Textiles
1.1 This test method covers the measurement of the average
force required to propagate a single-rip tear starting from a cut
3. Terminology
in a nonwoven fabric using a falling-pendulum (Elmendorf)
3.1 Definitions:
apparatus.
3.1.1 length of tear, n—in tensile testing, the length of
1.2 This standard Elmendorf tear tester with interchange-
fabric torn, as measured on the fabric before tearing.
able pendulums has become the preferred test apparatus for
3.1.2 lengthwise direction, n—in textiles, the direction in a
determining tearing strength up to 6400 grams-force. It is
machine-made fabric parallel to the direction of movement the
recognized that some older test instruments with augmenting
fabric followed in the manufacturing machine.
weights continue to be used.As a consequence, these older test
3.1.2.1 Discussion—For nonwovens, an easily distinguish-
instruments may be used when agreed upon between the
able pattern for orientation may not be apparent, especially if
purchaserandthesupplier.Theconditionsfortheolderunitsas
removed from the roll. Care should be taken to maintain the
used with this test method are included in the appendix. For
directionality by clearly marking the direction.
tearing strength above 6400 grams-force, a high-capacity test
3.1.3 nonwoven fabric, n—a textile structure produced by
instrument is available equipped with augmenting weights to
bonding or interlocking of fibers, or both, accomplished by
increase the capacity.
mechanical, chemical, thermal, or solvent means, or combina-
1.3 This test method is applicable to most nonwoven fabrics
tion thereof.
that are treated or untreated, including heavily sized, coated, or
3.1.4 tearing energy, n—in tensile testing of fabrics, the
resin-treated, provided the fabric does not tear in the direction
work done in tearing the specimen.
crosswise to the direction of the force applied during the test.
3.1.5 tearing force, n—the average force required to con-
If the tear does not occur in the direction of the test, the fabric
tinue a tear previously started in a fabric.
is considered untearable in that direction by this test method.
3.1.5.1 Discussion—For nonwovens, the tearing force is
1.4 The values stated in SI units are to be regarded as the
recorded as the maximum force required to continue a tear
standard. The inch-pound units given in parentheses may be
previously started in a fabric.
approximate.
3.1.6 tearing strength, n—the force required either to start
1.5 This standard does not purport to address all of the
or to continue or propagate a tear in a fabric under specified
safety concerns, if any, associated with its use. It is the
conditions.
responsibility of the user of this standard to establish appro-
3.1.7 widthwise direction, n—in textiles, the direction in a
priate safety and health practices and determine the applica-
machine-made fabric perpendicular to the direction of move-
bility of regulatory limitations prior to use.
ment the fabric followed in the manufacturing machine.
2. Referenced Documents 3.1.8 For definitions of other textile terms used in this test
method, refer to Terminologies D 123 and D 4848.
2.1 ASTM Standards:
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D 123 Terminology Relating to Textiles
4. Summary of Test Method
D 689 Test Method for Internal Tearing Resistance of Pa-
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4.1 The force required to continue a slit previously cut in a
per
2 nonwoven fabric is determined by measuring the work done in
D 1776 Practice for Conditioning Textiles for Testing
tearing it through a fixed distance. The tester consists of a
sector-shaped pendulum carrying a clamp which is in align-
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This test method is under the jurisdiction ofASTM Committee D13 onTextiles
ment with a fixed clamp when the pendulum is in the raised,
and is the direct responsibility of Subcommittee D13.90 on Executive.
Current edition approved June 15, 1995. Published September 1995.
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Annual Book of ASTM Standards, Vol 07.01.
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Annual Book of ASTM Standards, Vol 15.09. Annual Book of ASTM Standards, Vol 07.02.
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D5734–95 (2001)
starting position with maximum potential energy. The speci- a be
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