ASTM D6479-01

Standard Test Method for Determining the Edgecomb Resistance of Woven Fabrics Used in Inflatable Restraints

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 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.
1.4 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.

General Information

• Status: Historical
• Publication Date: 09-Apr-2001
• ICS: 43.040.60 - Bodies and body components
• ICS: 59.080.30 - Textile fabrics
• Technical Committee: D13 - Textiles
• Drafting Committee: D13.20 - Inflatable Restraints

Relations

• Replaced By: ASTM D6479-02 - Standard Test Method for Determining the Edgecomb Resistance of Woven Fabrics Used in Inflatable Restraints
• Effective Date: 10-Apr-2002

Standards Content (Sample)

Designation: D 6479 – 01
Standard Test Method for
Determining the Edgecomb Resistance of Woven Fabrics
1
Used in Inflatable Restraints
This standard is issued under the fixed designation D 6479; 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 tion of yarns from their normal orthagonal configuration in a
woven fabric due to seam stress or similar action near the edge
1.1 This test method covers the procedures for determining
of a cut part
the resistance to edgecombing of a woven fabric used in
3.1.2 inflatable restraint, n—a vehicular safety device de-
inflatable restraints.
signed to cushion an occupant or equipment during collision;
1.2 Procedures and apparatus other than those stated in this
airbag.
standard may be used by agreement of purchaser and supplier
3.1.3 seam slippage, n—in sewn fabrics, the displacement
with the specific deviations from the standard practice ac-
of the fabric yarn parallel and adjacent to the stitch line
knowledged in the report.
3.1.4 yarn slippage,, n—in sewn fabrics, the displacement
1.3 The values stated in either SI units or inch-pound units
of one or more yarns from the original position, causing
are to be regarded separately as standard. The values stated in
differences in alignment, spacing, or both.
each system are not exact equivalents; therefore, each system
3.2 For definitions of other textile terms used in this test
must be used independent of the other.
method, refer to Terminology D 123.
1.4 This standard does not purport to address all of the
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-
4.1 One end of a test specimen is clamped within one jaw of
priate safety and health practices and determine the applica-
a CRE tensile testing machine and a special fixture pierces a
bility of regulatory limitations prior to use.
row of equally spaced needle holes through the opposite end of
2. Referenced Documents the specimen. In accordance with Test Method D 5035, a
tensile force is applied to the specimen until rupture occurs.
2.1 ASTM Standards:
The measurement of the force required to cause rupture is the
D 76 Specification for Tensile Testing Machines for Tex-
2
measurement of edgecomb resistance.
tiles
2
D 123 Terminology Relating to Textiles
5. Significance and Use
2
D 1776 Practice for Conditioning Textiles for Testing
5.1 A measurement of a fabric’s edgecomb resistance indi-
D 2904 Practice for Interlaboratory Testing of a Textile Test
2 cates the relative tendency of a fabric to pull apart under seam
Method that Produces Normally Distributed Data
stress or similar action. The related concepts of yarn slippage
D 2906 Practice for Statements on Precision and Bias for
2 and seam slippage are limited to sewn seams, whereas the
Textiles
measurement of edgecomb resistance is made at the edge of a
D 5035 Test Method for Breaking Force and Elongation of
3 cut part in the absence of a sewn seam. The absence of a sewn
Textile Fabrics (Raveled Strip)
seam in this test method eliminates the effect that a particular
D 5822 (Test Method for Determining Seam Strength in
3 stitch might have on the tendency of a yarn to slip near an edge
Inflatable Restraint Cushion)
of a cut part
E 691 Practice for Conducting an Interlaboratory Study to
2 5.2 This test method is useful for material design evalua-
Determine The Precision of a Test Method
tions in such applications as airbags in which seam stress is a
3. Terminology major concern.
5.3 This method may be used as a complement to Test
3.1 Definitions:
Method D 5822.
3.1.1 edgecombing, n—for inflatable restraints, the separa-
6. Apparatus
1
This test method is under the jurisdiction of ASTM Committee D13 on Textiles
6.1 Tensile Testing Machine—A constant-rate-of-extension
and are the direct responsibility of Subcommittee D13.20 on Inflatable Restraints.
(CRE) type, that is designed for the tensile forces anticipated,
Current edition approved April 10, 2001. Published June 2001. Originally
published as D 6479–99. Last previous edition D 6479 – 00. that is operated at a rate of 200 6 10 mm/min (86 0.5 in./min),
2
Annual Book of ASTM Standards, Vol 07.01.
that has a force range selected such that the anticipated break
3
Annual Book of ASTM Standards, Vol 07.02.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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D 6479
occurs between 10 and 90 % of full scale load, and that has 7.4 From the laboratory sample, select five test specimens
jaws and grip faces as agreed upon by purchaser and supplier. each from the warp and fill directions (Fig. 2).
6.2 Clamps, jaws with smooth, flat, parallel faces a mi
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