ASTM D6479-15
(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
5.1 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
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.
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 −15
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 E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
1.1 This test method covers the procedures for determining
the resistance to edgecombing of a woven fabric used in
3. Terminology
inflatable restraints.
3.1 For all terminology relating to D13.20, Inflatable
1.2 Procedures and apparatus other than those stated in this
restraints, refer to Terminology D6799.
standard may be used by agreement of purchaser and supplier
3.1.1 The following terms are relevant to this standard:
with the specific deviations from the standard practice ac-
edgecombing, inflatable restraint, seam slippage, yarn slippage
knowledged in the report.
3.2 For all other terms related to textiles, see Terminology
1.3 The values stated in SI units are to be regarded as
D123.
standard. No other units of measurement are included in this
3.3 Definitions:
standard.
3.4 For definitions of other terms used in this standard, refer
1.4 This standard does not purport to address all of the
to Terminology D123 and Terminology D6799.
safety concerns, if any, associated with its use. It is the
4. Summary of Test Method
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4.1 One end of a test specimen is clamped within one jaw of
bility of regulatory limitations prior to use.
a CRE tensile testing machine and a special fixture pierces a
row of equally spaced needle holes through the opposite end of
2. Referenced Documents
the specimen. In accordance withTest Method D5035, a tensile
2
2.1 ASTM Standards: force is applied to the specimen until rupture occurs. The
D1776 Practice for Conditioning and Testing Textiles measurement of the force required to cause rupture is the
D123 Terminology Relating to Textiles measurement of edgecomb resistance.
D2904 Practice for Interlaboratory Testing of a Textile Test
5. Significance and Use
Method that Produces Normally Distributed Data (With-
3
drawn 2008) 5.1 A measurement of a fabric’s edgecomb resistance indi-
cates the relative tendency of a fabric to pull apart under seam
D2906 Practice for Statements on Precision and Bias for
3
stress or similar action. The related concepts of yarn slippage
Textiles (Withdrawn 2008)
and seam slippage are limited to sewn seams, whereas the
D5035 Test Method for Breaking Force and Elongation of
measurement of edgecomb resistance is made at the edge of a
Textile Fabrics (Strip Method)
cut part in the absence of a sewn seam. The absence of a sewn
D5822 Test Method for Determining Seam Strength in
seam in this test method eliminates the effect that a particular
Inflatable Restraint Cushions
stitch might have on the tendency of a yarn to slip near an edge
D6799 Terminology Relating to Inflatable Restraints
of a cut part
5.2 This test method is useful for material design evalua-
1
This test method is under the jurisdiction ofASTM Committee D13 on Textiles
tions in such applications as airbags in which seam stress is a
and are the direct responsibility of Subcommittee D13.20 on Inflatable Restraints.
Current edition approved July 1, 2015. Published September 2015. Originally
major concern.
approved in 1999. Last previous edition approved in 2012 as D6479 – 12. DOI:
5.3 This method may be used as a complement to Test
10.1520/D6479-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Method D5822.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on 6. Apparatus
the ASTM website.
3
6.1 Tensile Testing Machine—A constant-rate-of-extension
The last approved version of this historical standard is referenced on
www.astm.org. (CRE) type, that is designed for the tensile forces anticipated,
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D6479−15
that is operated at a rate of 200 6 10 mm/min, that has a force 7. Sampling and Specimen Preparation
range selected such that the anticipated break occurs between
7.1 Edgecomb resistance testing is a destructive test. If used
10 and 90 % of full scale load, and that has jaws and grip faces
in conjunction with lot testing, sampling is required.
as
...
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 − 12 D6479 − 15
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.
1.3 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
3
D2904 Practice for Interlaboratory Testing of a Textile Test Method that Produces Normally Distributed Data (Withdrawn 2008)
3
D2906 Practice for Statements on Precision and Bias for Textiles (Withdrawn 2008)
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.
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 July 1, 2012July 1, 2015. Published August 2012September 2015. Originally approved in 1999. Last previous edition approved in 20112012 as
D6479 – 11.D6479 – 12. DOI: 10.1520/D6479-12.10.1520/D6479-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM 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.
3
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
1
---------------------- Page: 1 ----------------------
D6479 − 15
5. Significance and Use
5.1 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
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 constant-rate-of-extension (CRE) type, that is designed for the tensile forces anticipated, that
is o
...
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