ASTM D5427-09(2019)
(Practice)Standard Practice for Accelerated Aging of Inflatable Restraint Fabrics
Standard Practice for Accelerated Aging of Inflatable Restraint Fabrics
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 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.
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 the humidity, temperature, ozone, and cycling conditions to which the fabric is subjected.
5.4 Fabric specimens are configured in accordance with the requirements of test methods to be conducted on the specimens subsequent to accelerated aging.
5.5 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:
Description
Section
Cycle aging (Option “A” or “B”)
8.4
Heat aging (Option “A” or “B”)
8.4.3.1
Humidity aging (Option “A” or “B”)
8.7
Ozone aging
8.8
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5427 −09 (Reapproved 2019)
Standard Practice for
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. Referenced Documents
2.1 ASTM Standards:
1.1 This practice describes the procedures for the acceler-
D123Terminology Relating to Textiles
ated aging of inflatable restraint fabrics when required as a
D1776Practice for Conditioning and Testing Textiles
preparatory step for other test methods.
D6799Terminology Relating to Inflatable Restraints
1.1.1 In Section 7, this practice lists four methods for
E145 Specification for Gravity-Convection and Forced-
conducting accelerated aging that are of concern to the design
Ventilation Ovens
and manufacture of inflatable restraints. They are as follows:
2.2 Military Standard:
Description Section
MIL-STD-810E Environmental Testing and Engineering
Cycle aging (Option “A” or “B”) 8.4 Guidelines
Heat aging (Option “A” or “B”) 8.4.3.1
Humidity aging (Option “A” or “B”) 8.7
3. Terminology
Ozone aging 8.8
3.1 For all terminology relating to D13.20, Inflatable
1.2 This practice may be used in conjunction with other
restraints, refer to Terminology E145.
ASTM test methods when subsequent tests of physical prop-
3.1.1 The following terms are relevant to this standard:
erties are required of aged fabric specimens.
accelerated ageing, envirionmental conditions, inflatable
1.3 Procedures and apparatus other than those stated in this restraint, standard atmosphere for testing textiles
practice may be used by agreement between the purchaser and
3.2 For all other terms related to textiles, see Terminology
the supplier with the specific deviations from the standard
D123.
practice acknowledged in the report.
4. Summary of Practice
1.4 The values stated in either SI units or inch-pound units
4.1 After conditioning in the standard atmosphere for test-
are to be regarded separately as standard. The values stated in
ing textiles, test specimens are subjected to accelerated aging
each system are not exact equivalents; therefore, each system
for heat, humidity, ozone, or cycling.
must be used independently of the other.
4.2 Aged specimens are then reconditioned in the standard
1.5 This standard does not purport to address all of the
atmosphere for testing textiles for subsequent testing of the
safety concerns, if any, associated with its use. It is the
physical properties of inflatable restraint fabrics.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
5. Significance and Use
mine the applicability of regulatory limitations prior to use.
5.1 For inflatable restraints, practices for conducting accel-
1.6 This international standard was developed in accor-
erated aging are designed to determine the aggravated effects
dance with internationally recognized principles on standard-
on a fabric from exposures to heat, humidity, or ozone, or a
ization established in the Decision on Principles for the
combinationthereof.Theseenvironmentalconditionsmayalso
Development of International Standards, Guides and Recom-
be cycled in combination. The four accelerated aging proce-
mendations issued by the World Trade Organization Technical
dures of concern to the design and manufacture of inflatable
Barriers to Trade (TBT) Committee.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
ThispracticeisunderthejurisdictionofASTMCommitteeD13onTextilesand contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
is the direct responsibility of Subcommittee D13.20 on Inflatable Restraints. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Jan. 1, 2019. Published January 2019. Originally the ASTM website.
approved in 1993. Last previous edition approved in 2014 as D5427–09 (2014). AvailablefromtheDefensePrintingOffice,Building4D,700RobbinsAvenue,
DOI: 10.1520/D5427-09R19. Philadelphia, PA 19111-5093.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D5427 − 09 (2019)
restraints are referred to as cycle aging, heat aging, humidity 7. Sampling
aging, and ozone aging.
7.1 Rolls of fabric are sampled to yield test specimens in
accordance with the sampling plan agreed upon by purchaser
5.2 The environmental conditions described in this practice
and supplier. The number of test specimens and their configu-
are designed to allow restraints so that reliable comparisons
ration shall conform to the requirements of the ASTM test
may be made between different fabrics and different laborato-
methods associated with subsequent physical property testing.
ries.
5.3 In order to achieve precise and reliable physical prop- 8. Procedure
erty comparisons of different fabrics, it is necessary to control
8.1 Condition fabric specimens in the standard atmosphere
accurately the humidity, temperature, ozone, and cycling con-
for testing textiles for 24 h and configure them in accordance
ditions to which the fabric is subjected.
with the test method that is to follow each accelerated aging
procedure, or in accordance with alternate procedures estab-
5.4 Fabric specimens are configured in accordance with the
lished by agreement of purchaser and supplier and acknowl-
requirementsoftestmethodstobeconductedonthespecimens
edged in the test report.
subsequent to accelerated aging.
8.2 Expose the specimens in accordance with the proce-
5.5 Unless otherwise specified by agreement between the
dures given in 8.4 – 8.8, or in accordance with alternate
purchaser and the supplier, this practice shall constitute the
procedures established by agreement between the purchaser
conditions, procedures, and equipment by which inflatable
and the supplier and acknowledged in the report.
restraint fabrics are conditioned and aged. It is intended to be
8.2.1 If during placement of the specimens the environmen-
used as a guideline in establishing a written material specifi-
tal conditions within the chamber are no longer within pre-
cation.Thespecificationoragreementofthepurchaserandthe
scribedlimits,beginthetimingoftheagingprocessonlywhen
supplier may deviate from the practices described herein when
the chamber is once again stabilized within prescribed limits.
(based on experience) considerations of fabric properties,
8.2.2 Ensurethatthespecimensareplacedinthechamberin
material handling equipment, or inflatable restraint system
aconfigurationthatpermitsfreeflowofairaroundthemduring
design dictate otherwise.
the aging process.
8.2.3 Thechambertemperatureshallbecontrolledtowithin
6. Apparatus
62°C (65°F) and the relative humidity shall be controlled to
6.1 Conditioning Room or Chambers:
within 65% RH.
6.1.1 Room or chamber suitable for maintaining the stan-
8.3 Interruptions to an accelerated aging process may result
dardatmospherefortestingtextiles,withequipmentforrecord-
inexposureofthetestspecimen(s)toenvironmentalconditions
ing the temperature and humidity of the room.
that are more extreme than specified and that trend in a
6.1.2 For heat aging, a ventilated drying oven with a
direction away from ambient (an overtest interruption), or
temperaturerangefrom100to13
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