ASTM D6799-08
(Terminology)Standard Terminology Relating to Inflatable Restraints
Standard Terminology Relating to Inflatable Restraints
SCOPE
1.1 This standard covers terminology which is used in the evaluation of inflatable restraint fabrics, cushions, and modules.
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Designation:D6799 −08
StandardTerminology Relating to
1
Inflatable Restraints
This standard is issued under the fixed designation D6799; 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 blip, n—for inflatable restraint fabrics, any short, irregularly
shaped or textured portion of an individual multifilament
1.1 This standard covers terminology which is used in the
yarn that has been woven into the fabric, including slough
evaluation of inflatable restraint fabrics, cushions, and mod-
offs, stripbacks, fuzz balls, snarls, and slubs.
ules.
breakout pressure, n—for inflatable restraints, the pressure
2. Referenced Documents
level during deployment which ruptures the module cover.
2
2.1 ASTM Standards:
broken filament, n—for inflatable restraint fabrics, an indi-
D123 Terminology Relating to Textiles
vidual filament, separated from a multifilament yarn bundle,
D3990 Terminology Relating to Fabric Defects
that lies on the surface of the fabric.
3. Terminology
bruise, n—for inflatable restraint fabrics, a shift in the
3.1 Definitions:
squareness of the weave pattern in an area that has been
abrasion, n—for inflatable restraint fabrics, a fuzzy cluster of
subjected to impact or pressure.
broken filaments damaged by scraping.
coated fabric, n—a flexible material composed of a textile
accelerated aging, n—in textile processing and testing, the use
fabric and an adherent polymeric material applied to one or
of controlled environmental conditions to promote rapid
both sides.
physical or chemical change in a textile material.
DISCUSSION—For inflatable restraints, practices for conducting accel-
coating slub, n—for coated inflatable restraint fabrics, an
erated aging are designed to determine the aggravated effects on a
irregularly shaped lump of coating material on the surface of
fabric from exposures to heat, humidity, or ozone, or a combination
the coated layer resembling a yarn slub.
thereof. These environmental conditions may also be cycled in combi-
nation. The four accelerated aging procedures of concern to the design
coating streak, n—for coated inflatable restraint fabrics,
and manufacture of inflatable restraints are referred to as cycle aging,
minor variation in the color or opacity of the coated layer.
heat aging, humidity aging, and ozone aging.
air splice, n—for inflatable restraint fabrics, the thicker
coating transfer, n—for coated inflatable restraint fabrics, the
portion of a yarn resulting from the entanglement of the
presence of coating material on the uncoated side, covering
filaments at the ends of two multifilament yarns to create a
one or more yarns.
continuous yarn.
contamination, n—for coated inflatable restraint fabrics, the
average dynamic air permeability (ADAP), n—for inflatable
presence of non-coating material in the coated layer.
restraints, the average of all of DAP measurements within a
cushion, n—for inflatable restraints, the inflatable fabric en-
specified range of pressure differentials.
velope portion of a module.
bleedthrough, n—for coated inflatable restraint fabrics, the
presence of coating material on the uncoated side, between
cushion overpressurization, n—for inflatable restraints, the
two yarns, without covering either yarn. process of inflating a cushion at internal pressures greater
than design deployment pressures; bag burst.
1
ThisterminologyisunderthejurisdictionofASTMCommitteeD13onTextiles
defect, n—specific for inflatable restraints, an imperfection in
and is the direct responsibility of Subcommittee D13.20 on Inflatable Restraints.
a cut piece of fabric that judgment and experience indicate is
Current edition approved July 1, 2008. Published July 2008. Originally approved
in 2005. Last previous edition approved in 2007 as D6799 – 07. DOI: 10.1520/ likely to result in either hazardous or improper deployment
D6799-08.
of the inflatable restraint module in which the imperfection
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
is incorporated.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
DISCUSSION—An example of a defect is a hole in the piece of fabric
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. through which inflation gases can vent improperly.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D6799−08
deployment, n—for inflatable restraints, the sequence of coating layer is visibly at a higher rate of coverage than the
events related to the activation of a
...
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:D6799–07 Designation: D 6799 – 08
Standard Terminology Relating to
1
Inflatable Restraints
This standard is issued under the fixed designation D 6799; 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 standard covers terminology which is used in the evaluation of inflatable restraint fabrics, cushions, and modules.
2. Referenced Documents
2
2.1 ASTM Standards:
D 123 Terminology Relating to Textiles
D 3990 Terminology Relating to Fabric Defects
3. Terminology
3.1 Definitions:
abrasion, n—for inflatable restraint fabrics, a fuzzy cluster of broken filaments damaged by scraping.
accelerated aging, n— in textile processing and testing, the use of controlled environmental conditions to promote rapid physical
or chemical change in a textile material.
DISCUSSION—For inflatable restraints, practices for conducting accelerated aging are designed to determine the aggravated effects on a fabric from
exposures to heat, humidity, or ozone, or a combination thereof. These environmental conditions may also be cycled in combination. The four
acceleratedagingproceduresofconcerntothedesignandmanufactureofinflatablerestraintsarereferredtoascycleaging,heataging,humidityaging,
and ozone aging.
air splice, n—for inflatable restraint fabrics, the thicker portion of a yarn resulting from the entanglement of the filaments at the
ends of two multifilament yarns to create a continuous yarn.
average dynamic air permeability (ADAP), n—for inflatable restraints, the average of all of DAP measurements within a
specified range of pressure differentials.
bleedthrough, n— for coated inflatable restraint fabrics,thepresenceofcoatingmaterialontheuncoatedside,betweentwoyarns,
without covering either yarn.
blip, n—for inflatable restraint fabrics, any short, irregularly shaped or textured portion of an individual multifilament yarn that
has been woven into the fabric, including slough offs, stripbacks, fuzz balls, snarls, and slubs.
breakout pressure, n— for inflatable restraints, the pressure level during deployment which ruptures the module cover.
broken filament, n— for inflatable restraint fabrics, an individual filament, separated from a multifilament yarn bundle, that lies
on the surface of the fabric.
bruise, n—for inflatable restraint fabrics,ashiftinthesquarenessoftheweavepatterninanareathathasbeensubjectedtoimpact
or pressure.
coated fabric, n—a flexible material composed of a textile fabric and an adherent polymeric material applied to one or both sides.
coating slub, n— for coated inflatable restraint fabrics, an irregularly shaped lump of coating material on the surface of the coated
layer resembling a yarn slub.
coating streak, n— for coated inflatable restraint fabrics, minor variation in the color or opacity of the coated layer.
coating transfer, n— for coated inflatable restraint fabrics, the presence of coating material on the uncoated side, covering one
or more yarns.
contamination, n— for coated inflatable restraint fabrics, the presence of non-coating material in the coated layer.
cushion, n—for inflatable restraints, the inflatable fabric envelope portion of a module.
cushion overpressurization, n—for inflatable restraints,theprocessofinflatingacushionatinternalpressuresgreaterthandesign
deployment pressures; bag burst.
1
This terminology 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 Jan.July 1, 2007.2008. Published January 2007.July 2008. Originally approved in 2005. Last previous edition approved in 20052007 as
D 6799 – 057.
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 ----------------------
D6799–08
defect, n—specific for inflatable restraints, an imperfection in a cut piece of fabric that judgment and experience indicate is likely
to result in either hazardous or improper deployment of the inflatable restraint module in which the imperfection is incorporated.
DISCUSSION—An exam
...
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