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About This Item
Full Description
1.1 This test method covers the measurement of the change in length of a tensioned skein of textured yarn due to change in crimp characteristics brought about by exposure to wet or dry heat. The change in length, depending on procedure, is a measure of skein shrinkage, crimp contraction, bulk shrinkage, or crimp recovery.
1.2 This test method applies to crimped, continuous multifilament yarns ranging from 1.7 to 88.9 tex (15 to 800 denier).
1.3 Three conditions are provided for crimp development mediums, and loading routines are provided to be used on the yarn skeins to allow determination of yarn bulk by several different procedures.
1.4 The values stated in either SI units or inch-pound units are to be regarded as standard. Within the text, the inch-pound units are shown in parentheses. The values stated in each system are not exact equivalent; therefore, each system shall be used independently of the other. Combining values from the two systems may result in noncomformance with the specification.
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.
Document History
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ASTM D4031-07(2018)
Standard Test Method for Bulk Properties of Textured Yarns- Most Recent
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ASTM D4031-07(2012)
Standard Test Method for Bulk Properties of Textured Yarns- Historical Version
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ASTM D4031-07
Standard Test Method for Bulk Properties of Textured Yarns- Historical Version
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ASTM D4031-01
Standard Test Method for Bulk Properties of Textured Yarns- Historical Version
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ASTM D4031-95a
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Standard Test Method for Bulk Properties of Textured Yarns- Historical Version