ASTM-D5169 › Standard Test Method for Shear Strength (Dynamic Method) of Hook and Loop Touch Fasteners
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Scope
1.1 This test method measures the shear strength of hook and loop touch (CRE) fasteners using a recording constant rate of extension tensile testing machine.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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.
Significance and Use
This test method gives a measure of a key property of hook and loop touch fasteners which is of interest to users of such devices. This is a means of determining the resistance to separation when forces are applied parallel to the plane of the fastener.
In the case of a dispute arising from differences in reported test results when using this test method for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens which are as homogenous as possible and which are from a lot of hook and loop of the type in question. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using Student’t-test and an acceptable probability level chosen by the two parties before the testing began. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results in the light of the known bias.
Keywords
fastener; hook; hook and loop; loop; shear; shear strength; touch fastener; ICS Number Code 21.060.01 (Fasteners in general)
To find similar documents by ASTM Volume:
07.02 (Textiles (II): D4393 - latest)
To find similar documents by classification:
21.060.01 (Fasteners in general)
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Document Number
ASTM-D5169-98R21
Revision Level
1998 R21 EDITION
Status
Current
Modification Type
Reapproval
Publication Date
July 9, 2021
Document Type
Test Method
Page Count
3 pages
Committee Number
D13.54