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    ASTM D2591 - 07(2013)

    Standard Test Method for Linear Density of Elastomeric Yarns (Short Length Specimens)

    Active Standard ASTM D2591 | Developed by Subcommittee: D13.58

    Book of Standards Volume: 07.01

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    Significance and Use

    5.1 This test method is considered satisfactory for acceptance testing of commercial shipments because current estimates of between-laboratory precision are acceptable and the method is used extensively in the trade for acceptance testing.

    5.1.1 If there are differences of practical significance between reported test results for two laboratories (or more), comparative tests should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, use samples for such comparative tests that are as homogeneous as possible, drawn from the same lot of material as the samples that resulted in disparate results during initial testing, and randomly assigned in equal numbers to each laboratory. The test results from the laboratories involved should be compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If bias is found, either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias.

    5.2 Linear density of elastomeric yarns is used in some calculations for tensile and elastic properties.

    5.3 The test method is based on elastomeric yarns in lthe “as-produced” condition, but may be used for treated elastomeric yarns provided the treatment is specified. The method does not cover the removal of finish for the determination of linear density of “finish-free” elastomeric yarns.

    1. Scope

    1.1 This test method covers the determination of the linear density of short lengths of “as produced” elastomeric yarns made from rubber, spandex or other elastomers.

    Note 1—For the determination of linear density of elastomeric yarns using skeins, refer to Test Method D6717.

    1.2 This test method is not applicable to covered, wrapped, or core-spun yarns, or yarns spun from elastomeric staple, or elastomeric yarns removed from fabrics.

    1.3 This test method is applicable to elastomeric yarns having a range of 40 to 3200 dtex (36 to 2900 denier).

    1.4 The values stated in either SI units or U.S. Customary units are to be regarded separately as standard. Within the test the US Customary units are in parentheses. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other.

    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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D123 Terminology Relating to Textiles

    D2258 Practice for Sampling Yarn for Testing

    D4849 Terminology Related to Yarns and Fibers

    D6717 Test Method for Linear Density of Elastomeric Yarns (Skein Specimens)

    ICS Code

    ICS Number Code 59.080.20 (Yarns)

    UNSPSC Code

    UNSPSC Code 11151709(Synthetic yarn)

    Referencing This Standard
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    DOI: 10.1520/D2591-07R13

    Citation Format

    ASTM D2591-07(2013), Standard Test Method for Linear Density of Elastomeric Yarns (Short Length Specimens), ASTM International, West Conshohocken, PA, 2013, www.astm.org

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