ASTM D5427-08
(Practice)Standard Practice for Accelerated Aging of Inflatable Restraint Fabrics
Standard Practice for Accelerated Aging of Inflatable Restraint Fabrics
SIGNIFICANCE AND USE
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 accelerated aging procedures of concern to the design and manufacture of inflatable restraints are referred to as cycle aging, heat aging, humidity aging, and ozone aging.
The environmental conditions described in this practice are designed to allow restraints so that reliable comparisons may be made between different fabrics and different laboratories.
In order to achieve precise and reliable physical property comparisons of different fabrics, it is necessary to control accurately the humidity, temperature, ozone, and cycling conditions to which the fabric is subjected.
Fabric specimens are configured in accordance with the requirements of test methods to be conducted on the specimens subsequent to accelerated aging.
Unless otherwise specified by agreement between the purchaser and the supplier, this practice shall constitute the conditions, procedures, and equipment by which inflatable restraint fabrics are conditioned and aged. It is intended to be used as a guideline in establishing a written material specification. The specification or agreement of the purchaser and the supplier may deviate from the practices described herein when (based on experience) considerations of fabric properties, material handling equipment, or inflatable restraint system design dictate otherwise.
SCOPE
1.1 This practice describes the procedures for the accelerated aging of inflatable restraint fabrics when required as a preparatory step for other test methods.
1.1.1 In Section 7, this practice lists four methods for conducting accelerated aging that are of concern to the design and manufacture of inflatable restraints. They are as follows:
DescriptionSection Cycle aging8.4 Heat aging8.5 Humidity aging8.6 Ozone aging8.7
1.2 This practice may be used in conjunction with other ASTM test methods when subsequent tests of physical properties are required of aged fabric specimens.
1.3 Procedures and apparatus other than those stated in this practice may be used by agreement between the purchaser and the supplier with the specific deviations from the standard practice acknowledged in the report.
1.4 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 independently of the other.
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.
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Designation: D 5427 – 08
Standard Practice for
1
Accelerated Aging of Inflatable Restraint Fabrics
This standard is issued under the fixed designation D5427; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber 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 Military Standard:
MIL-STD-810E Environmental Testing and Engineering
1.1 This practice describes the procedures for the acceler-
3
Guidelines
ated aging of inflatable restraint fabrics when required as a
preparatory step for other test methods.
3. Terminology
1.1.1 In Section 7, this practice lists four methods for
3.1 For all terminology relating to D13.20, Inflatable re-
conducting accelerated aging that are of concern to the design
straints, refer to Terminology D6799.
and manufacture of inflatable restraints. They are as follows:
3.1.1 The following terms are relevant to this standard:
Description Section
accelerated ageing, envirionmental conditions, inflatable re-
Cycle aging 8.4
straint, standard atmosphere for testing textiles
Heat aging 8.5
3.2 For all other terms related to textiles, see Terminology
Humidity aging 8.6
D123.
Ozone aging 8.7
1.2 This practice may be used in conjunction with other
4. Summary of Practice
ASTM test methods when subsequent tests of physical prop-
4.1 After conditioning in the standard atmosphere for test-
erties are required of aged fabric specimens.
ing textiles, test specimens are subjected to accelerated aging
1.3 Procedures and apparatus other than those stated in this
for heat, humidity, ozone, or cycling.
practice may be used by agreement between the purchaser and
4.2 Aged specimens are then reconditioned in the standard
the supplier with the specific deviations from the standard
atmosphere for testing textiles for subsequent testing of the
practice acknowledged in the report.
physical properties of inflatable restraint fabrics.
1.4 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
5. Significance and Use
each system are not exact equivalents; therefore, each system
5.1 For inflatable restraints, practices for conducting accel-
must be used independently of the other.
erated aging are designed to determine the aggravated effects
1.5 This standard does not purport to address all of the
on a fabric from exposures to heat, humidity, or ozone, or a
safety concerns, if any, associated with its use. It is the
combinationthereof.Theseenvironmentalconditionsmayalso
responsibility of the user of this standard to establish appro-
be cycled in combination. The four accelerated aging proce-
priate safety and health practices and determine the applica-
dures of concern to the design and manufacture of inflatable
bility of regulatory limitations prior to use.
restraints are referred to as cycle aging, heat aging, humidity
aging, and ozone aging.
2. Referenced Documents
5.2 The environmental conditions described in this practice
2
2.1 ASTM Standards:
are designed to allow restraints so that reliable comparisons
D123 Terminology Relating to Textiles
may be made between different fabrics and different laborato-
D1776 Practice for Conditioning and Testing Textiles
ries.
D6799 Terminology Relating to Inflatable Restraints
5.3 In order to achieve precise and reliable physical prop-
E145 Specification for Gravity-Convection and Forced-
erty comparisons of different fabrics, it is necessary to control
Ventilation Ovens
accurately the humidity, temperature, ozone, and cycling con-
ditions to which the fabric is subjected.
5.4 Fabric specimens are configured in accordance with the
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ThispracticeisunderthejurisdictionofASTMCommitteeD13onTextilesand
requirementsoftestmethodstobeconductedonthespecimens
is the direct responsibility of Subcommittee D13.20 on Inflatable Restraints.
subsequent to accelerated aging.
CurrenteditionapprovedJuly1,2008.PublishedJuly2008.Originallyapproved
in 1993. Last previous edition approved in 2007 as D5427–03(2007).
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
3
Standards volume information, refer to the standard’s Document Summary page on AvailablefromtheDefensePrintingOffice,Building4D,700RobbinsAvenue,
the ASTM website. Philadelphia, PA 19111-5093.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
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D5427–08
5.5 Unless otherwise specified by agreement between the 8.2 Expose the specimens in accordance with the proce-
purchaser and the supplier, this practic
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:D5427–03 (Reapproved 2007) Designation: D 5427 – 08
Standard Practice for
1
Accelerated Aging of Inflatable Restraint Fabrics
This standard is issued under the fixed designation D5427; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber 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 Thispracticedescribestheproceduresfortheacceleratedagingofinflatablerestraintfabricswhenrequiredasapreparatory
step for other test methods.
1.1.1 In Section 7, this practice lists four methods for conducting accelerated aging that are of concern to the design and
manufacture of inflatable restraints. They are as follows:
Description Section
Cycle aging 8.4
Heat aging 8.5
Humidity aging 8.6
Ozone aging 8.7
1.2 This practice may be used in conjunction with otherASTM test methods when subsequent tests of physical properties are
required of aged fabric specimens.
1.3 Procedures and apparatus other than those stated in this practice may be used by agreement between the purchaser and the
supplier with the specific deviations from the standard practice acknowledged in the report.
1.4 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 independently of the other.
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:
D123 Terminology Relating to Textiles
D1776 Practice for Conditioning and Testing Textiles
D6799 Terminology Relating to Inflatable Restraints
E145 Specification for Gravity-Convection and Forced-Ventilation Ovens
2.2 Military Standard:
3
MIL-STD-810E Environmental Testing and Engineering Guidelines
3. Terminology
3.1Definitions:
3.1.1For definitions of other terms used in this standard, refer to Terminology D123 and Terminology D6799.
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: accelerated ageing, envirionmental conditions, inflatable restraint,
standard atmosphere for testing textiles
3.2 For all other terms related to textiles, see Terminology D123.
4. Summary of Practice
4.1 Afterconditioninginthestandardatmospherefortestingtextiles,testspecimensaresubjectedtoacceleratedagingforheat,
humidity, ozone, or cycling.
1
This practice 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, 2007.2008. Published August 2007.July 2008. Originally approved in 1993. Last previous edition approved in 20032007 as
D5427–03(2007).
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from the Defense Printing Office, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5093.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D5427–08
4.2 Agedspecimensarethenreconditionedinthestandardatmospherefortestingtextilesforsubsequenttestingofthephysical
properties of inflatable restraint fabrics.
5. Significance and Use
5.1 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
incombination.Thefouracceleratedagingproceduresofconcerntothedesignandmanufactureofinflatablerestraintsarereferred
to as cycle aging, heat aging, humidity aging, and ozone aging.
5.2 The environmental conditions described in this practice are designed to allow restraints so that reliable comparisons may
be made between different fabrics and different laboratories.
5.3 In order to achieve precise and reliable physical property comparisons of different fabrics, it is necessary to control
accurately
...
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