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Description of ASTM-D5170 2010ASTM D5170 - 98(2010)Standard Test Method for Peel Strength ('T' Method) of Hook and Loop Touch FastenersActive Standard ASTM D5170 | Developed by Subcommittee: D13.54 Book of Standards Volume: 07.02 ASTM D5170Significance 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 normal to the line of separation of the fastener. The force registered in a peel test is irregular, and as a consequence, empirical methods have had to be developed to obtain usable values related to peel strength. In spite of the empirical nature of the reported values, it is believed they reflect comparative performance of similar touch fasteners tested and measured in the same way. Two optional methods of calculation are provided: integrator average and average of five highest peaks. These test methods are not equivalent. Generally, the integrator average will be lower than the average of the five highest peaks. The highest peaks which reflect the force required to separate a hook and loop closure bear no simple relationship to the average force (integrator average). The average of the five highest peaks better reflect performance but the integrator results may be used to characterize a closure and for quality control purposes. The integrator average is relatively easy to calculate given the proper equipment. 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's 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. 1. Scope 1.1 This test method covers the measurement of the peel strength of hook and loop touch fasteners using a recording constant-rate-of-extension tensile testing machine (CRE). 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 This standard does not purport to address all of the safety problems, 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.
ASTM Standards D618 Practice for Conditioning Plastics for Testing Keywords fastener; hook and loop; hook; loop; peel; peel strength; touch fastener; T-peel test; Constant rate-of-extension (CRE) test; Fasteners; Hook and loop touch fasteners; Loop fasteners; Peel strength tests; Tensile properties/testing--textile materials/applications; Touch fasteners; ICS Code ICS Number Code 61.040 (Headgear. Clothing accessories. Fastening of clothing) DOI: 10.1520/D5170-98R10 ASTM International is a member of CrossRef. ASTM D5170This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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