ASTM D5427-09(2014)
(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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:D5427 −09 (Reapproved 2014)
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 E145 Specification for Gravity-Convection and Forced-
Ventilation Ovens
1.1 This practice describes the procedures for the acceler-
2.2 Military Standard:
ated aging of inflatable restraint fabrics when required as a
MIL-STD-810E Environmental Testing and Engineering
preparatory step for other test methods.
Guidelines
1.1.1 In Section 7, this practice lists four methods for
conducting accelerated aging that are of concern to the design
3. Terminology
and manufacture of inflatable restraints. They are as follows:
Description Section 3.1 For all terminology relating to D13.20, Inflatable
restraints, refer to Terminology E145.
Cycle aging (Option “A” or “B”) 8.4
3.1.1 The following terms are relevant to this standard:
Heat aging (Option “A” or “B”) 8.4.3.1
Humidity aging (Option “A” or “B”) 8.7 accelerated ageing, envirionmental conditions, inflatable
Ozone aging 8.8
restraint, standard atmosphere for testing textiles
1.2 This practice may be used in conjunction with other
3.2 For all other terms related to textiles, see Terminology
ASTM test methods when subsequent tests of physical prop-
D123.
erties are required of aged fabric specimens.
1.3 Procedures and apparatus other than those stated in this 4. Summary of Practice
practice may be used by agreement between the purchaser and
4.1 After conditioning in the standard atmosphere for test-
the supplier with the specific deviations from the standard
ing textiles, test specimens are subjected to accelerated aging
practice acknowledged in the report.
for heat, humidity, ozone, or cycling.
1.4 The values stated in either SI units or inch-pound units
4.2 Aged specimens are then reconditioned in the standard
are to be regarded separately as standard. The values stated in
atmosphere for testing textiles for subsequent testing of the
each system are not exact equivalents; therefore, each system
physical properties of inflatable restraint fabrics.
must be used independently of the other.
1.5 This standard does not purport to address all of the 5. Significance and Use
safety concerns, if any, associated with its use. It is the
5.1 For inflatable restraints, practices for conducting accel-
responsibility of the user of this standard to establish appro-
erated aging are designed to determine the aggravated effects
priate safety and health practices and determine the applica-
on a fabric from exposures to heat, humidity, or ozone, or a
bility of regulatory limitations prior to use.
combinationthereof.Theseenvironmentalconditionsmayalso
be cycled in combination. The four accelerated aging proce-
2. Referenced Documents
dures of concern to the design and manufacture of inflatable
2.1 ASTM Standards:
restraints are referred to as cycle aging, heat aging, humidity
D123Terminology Relating to Textiles
aging, and ozone aging.
D1776Practice for Conditioning and Testing Textiles
5.2 The environmental conditions described in this practice
D6799Terminology Relating to Inflatable Restraints
are designed to allow restraints so that reliable comparisons
may be made between different fabrics and different laborato-
ThispracticeisunderthejurisdictionofASTMCommitteeD13onTextilesand
ries.
is the direct responsibility of Subcommittee D13.20 on Inflatable Restraints.
5.3 In order to achieve precise and reliable physical prop-
Current edition approved July 1, 2014. Published August 2014. Originally
approved in 1993. Last previous edition approved in 2009 as D5427–09. DOI:
erty comparisons of different fabrics, it is necessary to control
10.1520/D5427-09R14.
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
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
D5427−09 (2014)
accurately the humidity, temperature, ozone, and cycling con- 8. Procedure
ditions to which the fabric is subjected.
8.1 Condition fabric specimens in the standard atmosphere
for testing textiles for 24 h and configure them in accordance
5.4 Fabric specimens are configured in accordance with the
with the test method that is to follow each accelerated aging
requirementsoftestmethodstobeconductedonthespecimens
procedure, or in accordance with alternate procedures estab-
subsequent to accelerated aging.
lished by agreement of purchaser and supplier and acknowl-
5.5 Unless otherwise specified by agreement between the
edged in the test report.
purchaser and the supplier, this practice shall constitute the
8.2 Expose the specimens in accordance with the proce-
conditions, procedures, and equipment by which inflatable
dures given in 8.4 – 8.8, or in accordance with alternate
restraint fabrics are conditioned and aged. It is intended to be
procedures established by agreement between the purchaser
used as a guideline in establishing a written material specifi-
and the supplier and acknowledged in the report.
cation.Thespecificationoragreementofthepurchaserandthe
8.2.1 If during placement of the specimens the environmen-
supplier may deviate from the practices described herein when
tal conditions within the chamber are no longer within pre-
(based on experience) considerations of fabric properties,
scribedlimits,beginthetimingoftheagingprocessonlywhen
material handling equipment, or inflatable restraint system
the chamber is once again stabilized within prescribed limits.
design dictate otherwise.
8.2.2 Ensurethatthespecimensareplacedinthechamberin
aconfigurationthatpermitsfreeflowofairaroundthemduring
6. Apparatus
the aging process.
6.1 Conditioning Room or Chambers:
8.2.3 Thechambertemperatureshallbecontrolledtowithin
6.1.1 Room or chamber suitable for maintaining the stan- 62°C (65°F) and the relative humidity shall be controlled to
dardatmospherefortestingtextiles,withequipmentforrecord- within 65% RH.
ing the temperature and humidity of the room.
8.3 Interruptions to an accelerated aging process may result
6.1.2 For heat aging, a ventilated drying oven with a
inexposureofthetestspecimen(s)toenvironmentalconditions
temperaturerangefrom100to130°C, 62°C(212to266°F,6
that are more extreme than specified and that trend in a
5 °F) for 500 h, in accordance with Specification E145.
direction away from ambient (an overtest interruption), or
6.1.3 For humidity aging, a chamber suitable for maintain-
conditionsthatarelessextremethanspecifiedandthattrendin
ing a fixed relative humidity of 60 to 98%, within a tolerance
a direction toward ambient (an undertest interruption).
of 65%,andafixedtemperaturebetween30to100°C 62°C
8.3.1 If an undertest interruption occurs, keep the chamber
(86 to 212 °F, 65 °F) for at least 500 h.
closed in an effort to maintain tolerances. As long as the
6.1.4 For ozone aging, a chamber suitable for ma
...
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: D5427 − 09 D5427 − 09 (Reapproved 2014)
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. 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 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
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:
MIL-STD-810E Environmental Testing and Engineering Guidelines
3. Terminology
3.1 For all terminology relating to D13.20, Inflatable restraints, refer to Terminology E145.
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 After conditioning in the standard atmosphere for testing textiles, test specimens are subjected to accelerated aging for heat,
humidity, ozone, or cycling.
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 Jan. 15, 2009July 1, 2014. Published February 2009August 2014. Originally approved in 1993. Last previous edition approved in 20082009 as
D5427 – 08.D5427 – 09. DOI: 10.1520/D5427-09.10.1520/D5427-09R14.
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
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
D5427 − 09 (2014)
4.2 Aged specimens are then reconditioned in the standard atmosphere for testing textiles for subsequent testing of the physical
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
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.
6. Apparatus
6.1 Conditioning Room or Chambers:
6.1.1 Room or chamber suitable for maintaining the standard atmosphere for testing textiles, with equipment for recording the
temperature and humidity of the room.
6.1.2 For heat aging, a ventilated drying oven with a temperature range from 100 to 130 °C, 62 °C (212 to 266 °F,6 5 °F) for
500 h, in accordance with Specification E145.
6.1.3 For humidity aging, a chamber suitable for maintaining a fixed relative humidity of 60 to 98 %, within a tolerance of
65 %, and a fixed temperature between 30 to 100 °C 62 °C (86 to 212 °F,6 5°F, 65 °F) for at least 500 h.
6.1.4 For ozone aging, a chamber suitable for maintaining the ozone concentration at 100 6 10 parts per hundred million
(pphm), and suitable for maintaining a temperature at 38 6 2°C (100 6 5 °F).
6.1.5 For cycle aging, a chamber with controls for cycling through several temperatures from −40 to 107 °C 6 2 °C (−40 to
225 °F, 6 5°F) and levels of relative humidity up to 95 %, 65 % for cycle times up to 72 h.
6.1.6 The aging chamber, the accessories contained therein, the sensors, and the data collection system shall be constructed and
arranged in accordance with MIL-STD-810E, Method 507.3, Section II.
6.2 For inflatable restraints, all test equipment used in accordance with the procedures referenced in this practice shall be
certified for calibration annually by an independent agency or equipment manufacturer whose results are traceable to National
Institute of Science and Technology (NIST) or other national standards laboratory. The test parameters of the equipment shall be
tested within the operating ranges covered in the material specification or equivalent document.
7. Sampling
7.1 Rolls of fabric are sampled to yield test specimens in accordance with the sampling plan agreed upon by purchaser and
supplier. The number of test specimens and their configuration shall conform to the requirements of the ASTM test methods
associated with subsequent physical property testing.
8. Procedure
8.1 Condition fabric specimens in the standard atmosphere for testing textiles for 24 h and configure them in accord
...
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