Standard Test Method for Determining Seam Strength in Inflatable Restraint Cushions
1.1 This test method covers the measurement of the maximum sewn seam strength which can be achieved in woven fabrics when a force is applied perpendicular to the seam. The grab test procedure in Test Method D1683, which is used to measure breaking force and elongation in sewn seams of woven fabrics, shall be used in conjunction with this test method for measuring seam strength.
1.2 This test method is restricted to sewn seams that are obtained from a previously sewn driver or passenger side cushion.
1.3 This test method is used when a resistance to a force, a breaking force, a minimum elongation, or a combination thereof are required to determine the sewn seam strength, seam slippage, or seam integrity of a particular fabric for inflatable restraint use.
1.4 Procedures and apparatus other than those stated in this standard may be used by agreement between purchaser and supplier with the specific deviations from the standard acknowledged in the report.
1.5 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.
1.6 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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