ASTM D6479-11
(Test Method)Standard Test Method for Determining the Edgecomb Resistance of Woven Fabrics Used in Inflatable Restraints
Standard Test Method for Determining the Edgecomb Resistance of Woven Fabrics Used in Inflatable Restraints
SIGNIFICANCE AND USE
A measurement of a fabric's edgecomb resistance indicates the relative tendency of a fabric to pull apart under seam stress or similar action. The related concepts of yarn slippage and seam slippage are limited to sewn seams, whereas the measurement of edgecomb resistance is made at the edge of a cut part in the absence of a sewn seam. The absence of a sewn seam in this test method eliminates the effect that a particular stitch might have on the tendency of a yarn to slip near an edge of a cut part
This test method is useful for material design evaluations in such applications as airbags in which seam stress is a major concern.
This method may be used as a complement to Test Method D5822.
SCOPE
1.1 This test method covers the procedures for determining the resistance to edgecombing of a woven fabric used in inflatable restraints.
1.2 Procedures and apparatus other than those stated in this standard may be used by agreement of purchaser and supplier with the specific deviations from the standard practice acknowledged in the report.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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.
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Designation: D6479 – 11
Standard Test Method for
Determining the Edgecomb Resistance of Woven Fabrics
1
Used in Inflatable Restraints
This standard is issued under the fixed designation D6479; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 This test method covers the procedures for determining 3.1 For all terminology relating to D13.20, Inflatable re-
the resistance to edgecombing of a woven fabric used in straints, refer to Terminology D6799.
inflatable restraints. 3.1.1 The following terms are relevant to this standard:
1.2 Procedures and apparatus other than those stated in this edgecombing, inflatable restraint, seam slippage, yarn slippage
standard may be used by agreement of purchaser and supplier 3.2 For all other terms related to textiles, see Terminology
with the specific deviations from the standard practice ac- D123.
knowledged in the report. 3.3 Definitions:
1.3 The values stated in SI units are to be regarded as 3.4 For definitions of other terms used in this standard, refer
standard. No other units of measurement are included in this to Terminology D123 and Terminology D6799.
standard.
4. Summary of Test Method
1.4 This standard does not purport to address all of the
4.1 One end of a test specimen is clamped within one jaw of
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- a CRE tensile testing machine and a special fixture pierces a
row of equally spaced needle holes through the opposite end of
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. thespecimen.InaccordancewithTestMethodD5035,atensile
force is applied to the specimen until rupture occurs. The
2. Referenced Documents
measurement of the force required to cause rupture is the
2
2.1 ASTM Standards: measurement of edgecomb resistance.
D1776 Practice for Conditioning and Testing Textiles
5. Significance and Use
D123 Terminology Relating to Textiles
D2904 Practice for Interlaboratory Testing of a Textile Test 5.1 A measurement of a fabric’s edgecomb resistance indi-
cates the relative tendency of a fabric to pull apart under seam
Method that Produces Normally Distributed Data
D2906 Practice for Statements on Precision and Bias for stress or similar action. The related concepts of yarn slippage
3
and seam slippage are limited to sewn seams, whereas the
Textiles
D5035 Test Method for Breaking Force and Elongation of measurement of edgecomb resistance is made at the edge of a
cut part in the absence of a sewn seam. The absence of a sewn
Textile Fabrics (Strip Method)
D5822 Test Method for Determining Seam Strength in seam in this test method eliminates the effect that a particular
stitch might have on the tendency of a yarn to slip near an edge
Inflatable Restraint Cushions
D6799 Terminology Relating to Inflatable Restraints of a cut part
5.2 This test method is useful for material design evalua-
E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method tions in such applications as airbags in which seam stress is a
major concern.
5.3 This method may be used as a complement to Test
1
This test method is under the jurisdiction ofASTM Committee D13 onTextiles
Method D5822.
and are the direct responsibility of Subcommittee D13.20 on Inflatable Restraints.
Current edition approved May 1, 2011. Published May 2011. Originally
6. Apparatus
approved in 1999. Last previous edition approved in 2008 as D6479 – 08. DOI:
10.1520/D6479-11.
6.1 Tensile Testing Machine—A constant-rate-of-extension
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
(CRE) type, that is designed for the tensile forces anticipated,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
that is operated at a rate of 200 6 10 mm/min, that has a force
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
range selected such that the anticipated break occurs between
3
Withdrawn. The last approved version of this historical standard is referenced
on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6479 – 11
10 and 90 % of full scale load, and that has jaws and grip faces 7.3 From the end of each roll of fabric taken from the lot
as agreed upon by purchaser and supplier. sample, cuta1m long, full width sample of fabric.
6.2 Clamps, jaws with smooth, flat, paralle
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D6479–08 Designation: D6479 – 11
Standard Test Method for
Determining the Edgecomb Resistance of Woven Fabrics
1
Used in Inflatable Restraints
This standard is issued under the fixed designation D6479; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers the procedures for determining the resistance to edgecombing of a woven fabric used in inflatable
restraints.
1.2 Procedures and apparatus other than those stated in this standard may be used by agreement of purchaser and supplier with
the specific deviations from the standard practice acknowledged in the report.
1.3The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system are not exact equivalents; therefore, each system must be used independent of the other.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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
2.1 ASTM Standards:
D1776 Practice for Conditioning and Testing Textiles
D123 Terminology Relating to Textiles
D2904 Practice for Interlaboratory Testing of a Textile Test Method that Produces Normally Distributed Data
D2906 Practice for Statements on Precision and Bias for Textiles
D5035 Test Method for Breaking Force and Elongation of Textile Fabrics (Strip Method)
D5822 Test Method for Determining Seam Strength in Inflatable Restraint Cushions
D6799 Terminology Relating to Inflatable Restraints
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3. Terminology
3.1 For all terminology relating to D13.20, Inflatable restraints, refer to Terminology D6799.
3.1.1 The following terms are relevant to this standard: edgecombing, inflatable restraint, seam slippage, yarn slippage
3.2 For all other terms related to textiles, see Terminology D123.
3.3 Definitions:
3.4 For definitions of other terms used in this standard, refer to Terminology D123 and Terminology D6799.
4. Summary of Test Method
4.1 One end of a test specimen is clamped within one jaw of a CRE tensile testing machine and a special fixture pierces a row
of equally spaced needle holes through the opposite end of the specimen. In accordance with Test Method D5035, a tensile force
is applied to the specimen until rupture occurs. The measurement of the force required to cause rupture is the measurement of
edgecomb resistance.
5. Significance and Use
5.1 Ameasurement of a fabric’s edgecomb resistance indicates the relative tendency of a fabric to pull apart under seam stress
or similar action. The related concepts of yarn slippage and seam slippage are limited to sewn seams, whereas the measurement
1
This test method is under the jurisdiction of ASTM Committee D13 on Textiles and are the direct responsibility of Subcommittee D13.20 on Inflatable Restraints.
Current edition approved JulyMay 1, 2008.2011. Published July 2008.May 2011. Originally approved in 1999. Last previous edition approved in 20072008 as
D6479–02(2007).D6479 – 08. DOI: 10.1520/D6479-08.10.1520/D6479-11.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D6479 – 11
of edgecomb resistance is made at the edge of a cut part in the absence of a sewn seam. The absence of a sewn seam in this test
method eliminates the effect that a particular stitch might have on the tendency of a yarn to slip near an edge of a cut part
5.2 This test method is useful for material design evaluations in such applications as airbags in which seam stress is a major
concern.
5.3 This method may be used as a complement to Test Method D5822.
6. Apparatus
6.1 Tensile Testing Machine—A c
...
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