ASTM D5427-98

Standard Practice for Accelerated Aging of Inflatable Restraint Fabrics

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:  Methods Description Section 1A, 1B, 1C Cycle aging 7.4 2 Heat aging 7.5 3A, 3B Humidity aging 7.6 4 Ozone aging 7.7
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.

General Information

• Status: Historical
• Publication Date: 09-Mar-1998
• ICS: 43.040.80 - Crash protection and restraint systems
• ICS: 59.080.30 - Textile fabrics
• Technical Committee: D13 - Textiles
• Drafting Committee: D13.20 - Inflatable Restraints

Relations

• Replaced By: ASTM D5427-02 - Standard Practice for Accelerated Aging of Inflatable Restraint Fabrics
• Effective Date: 10-Apr-2002

Standards Content (Sample)

STD.ASTM D5Y27-ENGL 1998 W 075=l510 0639323 980 m
Designation: D 5427 - 98 AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Ban Ha&or Dr. West cOnshokcken. PA 19428
4lb
Reprinted frcm the Annual Book of ASTM Standards. Copyright ASTM
Standard Practice for
Accelerated Aging of Inflatable Restraint Fabrics’
This standard is issued under the fixed designation D 5427; 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 (6) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.1 accelerated aging, n-in textile processing and
testing, the use of controlled environmental conditions to
1.1 This practice describes the procedures for the acceler-
promote rapid physical or chemical change in a textile
ated aging of inflatable restraint fabrics when required as a
material.
preparatory step for other test methods.
3.1.1.1 Discussion-For inflatable restraints, practices for
1.1.1 In Section 7, this practice lists four methods for
conducting accelerated aging are designed to determine the
conducting accelerated aging that are of concern to the
aggravated effects on a fabric from exposures to heat,
design and manufacture of inflatable restraints. They are as
humidity, or ozone, or a combination thereof. These envi-
follows:
ronmental conditions may also be cycled in combination.
Methods Description Section
The four accelerated aging procedures of concern to the
lA, lB, IC Cycle aging 8.4
design and manufacture of inflatable restraints are referred to
2 Heat aging 8.5
as cycle aging, heat aging, humidity aging, and ozone aging.
8.6
Humidity aging
3, 3
4 Ozone aging 8.1
3.1.2 environmental conditions, n-in textile testing, the
atmosphere in which specified moisture levels, temperature
1.2 This practice may be used in conjunction with other
ranges, and concentrations of gases are controlled.
ASTM test methods when subsequent tests of physical
3.1.3 inflatable restraint, n-a vehicular safety device
properties are required of aged fabric specimens.
designed to cushion an occupant or equipment during
1.3 Procedures and apparatus other than those stated in
collision; an airbag.
this practice may be used by agreement between the pur-
3.1.4 standard atmosphere for testing textiles, n-in tex-
chaser and the supplier with the specific deviations from the
tiles, an atmosphere for testing in which the air is maintained
standard practice acknowledged in the report.
at a relative humidity of 65 -+ 2 % and at a temperature of 2 1
1.4 The values stated in either SI units or inch-pound
+ 1°C (70 +- 2°F).
units are to be regarded separately as standard. The values
3.1.5 For definitions of other textile terms used in this
stated in each system are not exact equivalents; therefore,
practice, refer to Terminology D 123.
each system must be used independently of the other.
1.5 This standard does not purport to address all of the
4. Summary of Practice
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 4.1 After conditioning in the standard atmosphere for
priate safety and health practices and determine the applica- testing textiles, test specimens are subjected to accelerated
bility of regulatory limitations prior to use. aging for heat, humidity, ozone, or cycling.
4.2 Aged specimens are then reconditioned in the stan-
dard atmosphere for testing textiles for subsequent testing of
2. Referenced Documents
the physical properties of inflatable restraint fabrics.
2.1 ASTM Standards:
D 123 Terminology Relating To Textiles*
5. Significance and Use
D 1776 Practice for Conditioning Textiles for Testing*
5.1 The purposes of accelerated aging are to simulate,
E 145 Specification for Gravity-Convection and Forced-
under controlled laboratory conditions, the environmental
Ventilation Ovens3
extremes to which inflatable restraint fabrics may be exposed
2.2 Military Standard:
in a vehicle over the specified life of the inflatable restraint,
MIL-STD-8 IOE Environmental Testing and Engineering
and to facilitate subsequent testing of physical properties to
Guidelines4
determine what differences exist between an aged specimen
and its control sample.
3. Terminology
5.2 The environmental conditions described in this prac-
3.1 Definitions:
tice are designed to allow restraints so that reliable compari-
sons may be made between different fabrics and different
laboratories.
I This practice is under the jurisdiction of ASTM Committee D-13 on Textiles
5.3 In order to achieve precise and reliable physical
and is the direct responsibility of Subcommittee D13.20 on Inflatable Restraints.
property comparisons of different fabrics, it is necessary to
Current edition approved March 10, 1998. Published Septe
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