ASTM D6478-09
(Test Method)Standard Test Method for Determining Specific Packability of Fabrics Used in Inflatable Restraints
Standard Test Method for Determining Specific Packability of Fabrics Used in Inflatable Restraints
SIGNIFICANCE AND USE
This test method is useful for determining the specific packability of uncoated and coated airbag fabrics. Fabric packability is an important factor in the design of airbag modules due to their inherent spacial contraints.
A folded specimen exhibits better specific packability if it occupies a lower total volume at the specified loads compared to another specimen.
The time required to test one sample (four specimens from the same lot of fabric) is approximately 1.5 h using this test method. Due to the length of time required by this test method to perform a single test, this test method is most suitable for use in design and development analysis or for inclusion in a list of required tests conducted for annual certification of an airbag fabric.
SCOPE
1.1 This test method covers procedures for determining the ability to fold and pack fabrics used for inflatable restraints using an index of specific packability.
1.2 Procedures in this test method describe operator techniques that must be followed closely to obtain repeatable and accurate results. Since these techniques are difficult to convey in writing, supplemental training for operators is required. A training video is available from ASTM (see Adjuncts ADJD6478 and ADJD6478A).
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 Procedures and apparatus other than those stated in this practice may be used as agreed upon between the purchaser and the supplier with specific deviations from this practice acknowledged in the report.
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.
General Information
Relations
Buy Standard
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D6478 – 09
Standard Test Method for
Determining Specific Packability of Fabrics Used in
1
Inflatable Restraints
This standard is issued under the fixed designation D6478; 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 2.2 ASTM Adjuncts:
3
ADJD6478 — 17 Detailed Drawings
1.1 This test method covers procedures for determining the
3
ADJD6478A- Videotape-Supplemental Training
ability to fold and pack fabrics used for inflatable restraints
using an index of specific packability.
3. Terminology
1.2 Procedures in this test method describe operator tech-
3.1 For all terminology relating to D13.20, Inflatable re-
niques that must be followed closely to obtain repeatable and
straints, refer to Terminology D6799.
accurate results. Since these techniques are difficult to convey
3.1.1 The following terms are relevant to this standard:
in writing, supplemental training for operators is required. A
inflatable restraint, packability, specific packability.
training video is available from ASTM (see Adjuncts
3.2 For all other terms related to textiles, see Terminology
ADJD64782.2 and ADJD6478A).
D123.
1.3 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
4. Summary of Test Method
standard.
4.1 Afabricspecimenisfoldeduniformlyina“Z”patternin
1.4 Procedures and apparatus other than those stated in this
the warp and fill directions.
practice may be used as agreed upon between the purchaser
4.2 The folded specimen is placed into a transparent box
and the supplier with specific deviations from this practice
that confines the specimen securely during compression.
acknowledged in the report.
4.3 Thefoldedspecimeniscompressedusingatensiletester
1.5 This standard does not purport to address all of the
outfitted with special hardware, and the resulting volume is
safety concerns, if any, associated with its use. It is the
recorded at specified loads. The total of all the individual
responsibility of the user of this standard to establish appro-
volumes recorded at each specified cell is the specific pack-
priate safety and health practices, and determine the applica-
ability of the fabric.
bility of regulatory limitations prior to use.
5. Significance and Use
2. Referenced Documents
2 5.1 This test method is useful for determining the specific
2.1 ASTM Standards:
packability of uncoated and coated airbag fabrics. Fabric
D123 Terminology Relating to Textiles
packability is an important factor in the design of airbag
D1776 Practice for Conditioning and Testing Textiles
modules due to their inherent spacial contraints.
D2904 Practice for Interlaboratory Testing of a Textile Test
5.2 Afolded specimen exhibits better specific packability if
Method that Produces Normally Distributed Data
it occupies a lower total volume at the specified loads com-
D6799 Terminology Relating to Inflatable Restraints
pared to another specimen.
E691 Practice for Conducting an Interlaboratory Study to
5.3 The time required to test one sample (four specimens
Determine the Precision of a Test Method
from the same lot of fabric) is approximately 1.5 h using this
test method. Due to the length of time required by this test
1
This test method is under the jurisdiction ofASTM Committee D13 onTextiles
method to perform a single test, this test method is most
and is the direct responsibility of Subcommittee D13.20 on Inflatable Restraints.
suitable for use in design and development analysis or for
Current edition approved July 1, 2009. Published August 2009. Originally
approvedin1999.Lastpreviouseditionin2008asD6478–08DOI:10.1520/D6478-
09.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from ASTM International Headquarters. For 17 Detailed CAD
Standards volume information, refer to the standard’s Document Summary page on Drawings, Order Adjunct No. ADJD6478. For Videotape-Supplemental Training,
the ASTM website. Order ADJD6478A.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D6478 – 09
inclusion in a list of required tests conducted for annual 8.1.1 Set tensile tester for compression mode, install load
certification of an airbag fabric. cell with maximum force rating of 200 to 1000N, set crosshead
speed to 25.0 6 1.0 mm/min, set data acquisition equipment to
6. Apparatus
record thickness with an accuracy of 0.1 mm at loads of 20 to
6.1 Tensile Tester, outfitt
...
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:D6478–08 Designation: D 6478 – 09
Standard Test Method for
Determining Specific Packability of Fabrics Used in
1
Inflatable Restraints
This standard is issued under the fixed designation D 6478; 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 procedures for determining the ability to fold and pack fabrics used for inflatable restraints using
an index of specific packability.
1.2 Procedures in this test method describe operator techniques that must be followed closely to obtain repeatable and accurate
results. Since these techniques are difficult to convey in writing, supplemental training for operators is required. A training video
is available from ASTM (see Adjuncts ADJD6478 and ADJD6478A).
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 Procedures and apparatus other than those stated in this practice may be used as agreed upon between the purchaser and
the supplier with specific deviations from this practice acknowledged in the report.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D 123 Terminology Relating to Textiles
D 1776 Practice for Conditioning and Testing Textiles
D 2904 Practice for Interlaboratory Testing of a Textile Test Method that Produces Normally Distributed Data D2906Practice
for State-
ments on
Precision
and Bias for
Textiles
D 6799 Terminology Relating to Inflatable Restraints
E 691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
2.2 ASTM Adjuncts:
3
ADJD6478 — 17 Detailed Drawings
3
ADJD6478A- Videotape-Supplemental Training
3. Terminology
3.1 For all terminology relating to D13.20, Inflatable restraints, refer to Terminology D 6799.
3.1.1 The following terms are relevant to this standard: inflatable restraint, packability, specific packability.
3.2 For all other terms related to textiles, see Terminology D 123.
4. Summary of Practice Summary of Test Method
4.1 A fabric specimen is folded uniformly in a “Z” pattern in the warp and fill directions.
1
This test method is under the jurisdiction of ASTM Committee D13 on Textiles and is the direct responsibility of Subcommittee D13.20 on Inflatable Restraints.
Current edition approved July 1, 2008.2009. Published July 2008.August 2009. Originally approved in 1999. Last previous edition in 20072008 as
D6478–02(2007)D 6478–08
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. ForAnnualBookofASTMStandards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from ASTM International Headquarters. For 17 Detailed CAD Drawings, Order Adjunct No. ADJD6478. For Videotape-Supplemental Training, Order
ADJD6478A.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D6478–09
4.2 The folded specimen is placed into a transparent box that confines the specimen securely during compression.
4.3 The folded specimen is compressed using a tensile tester outfitted with special hardware, and the resulting volume is
recorded at specified loads. The total of all the individual volumes recorded at each specified cell is the specific packability of the
fabric.
5. Significance and Use
5.1 This test method is useful for determining the specific packability of uncoated and coated airbag fabrics. Fabric packability
is an important factor in the design of airbag modules due to their inherent spacial contraints.
5.2 A folded specimen exhibits better specific packability if it occupies a lower total volume at the specified loads compared
to another specimen.
5.3 The time required to test one sampl
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.