ASTM D2062-03 (R2021) pdf free download.Standard Test Methods for Operability of Zippers.
3. Terminology
3. 1 Definitions:
3.1.1 For definitions of zipper terms used in these test methods, refer to Terminology D2050. For definitions of other textile terminology used in these test methods. refer to Terminology D123.
4. Significance and Use
4.1 The significance of specific tests is discussed in the appropriate sections.
4.2 These test methods are considered satisfactory for acceptance testing of commercial shipments of zippers because the methods have been used extensively in the trade for this purpose, even though current estimates of between-laboratory precision are quite large in some cases.
4.2.1 If there are differences of practical significance between reported test results for two laboratories (or more), comparative test should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, the test samples should be used that are as homogeneous as possible. that are drawn from the material from which the disparate test results were obtained, and that are randomly assigned in equal numbers to each laboratory for testing. Other materials with established test values may he used for this purpose. The test results from the two laboratories should he compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If a bias is found, either its cause must he found and corrected. or future test results must he adjusted in consideration of the known bias.
4.3 The method(s) in the standard along with those in Test Methods D205 1, D2052, D2053, D2054, D2057, D2058, D2059/D2059M, D2060, and D206 1 are a collection of proven test methods. They can be used as aids in the evaluation of zippers without the need for a thorough knowledge of zippers. The enumerated test methods do not provide for the evaluation of all zipper properties. Besides those properties measured by means of the enumerated test methods there are other properties that may he important for the satisfactory performance of a zipper. Test methods for measuring those properties have not been published either because no practical methods have yet been developed or because a valid evaluation of the information resulting from existing unpublished methods requires an intimate and thorough knowledge of zippers.
5. Apparatus
5.1 Force indicator (Fig. 1)—A 50 N or 10 lbf capacity force indicator equipped with a direct-reading dial graduated in 0.5 N or 0.1 1bf divisions, a maximum-reading indicator, and a clamp suitable for attaching the zipper tape ends to the indicator.
5.2 Spacer—A piece of metal designed to lit in the pin cavity ot the fixed retainer of the specimen and having a length equal to the element pitch of the specimen.
5.3 Hooks, suitable for attaching the force indicator to the slider pull of a specimen.ASTM D2062 pdf download.