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    ASTM D6828 - 02(2019)

    Standard Test Method for Stiffness of Fabric by Blade/Slot Procedure

    Active Standard ASTM D6828 | Developed by Subcommittee: D13.60

    Book of Standards Volume: 07.02

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    Significance and Use

    5.1 This test method is considered satisfactory for quality control testing.

    5.2 If there are differences of practical significance between reported test results for two laboratories, comparative tests should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, use test samples as homogeneous as possible, drawn from the material from which the disparate test results were obtained, and randomly assigned in equal number to each laboratory for testing. The test results from the two laboratories should be 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 be found and corrected, or future results for the source material must be adjusted in consideration of the known bias.

    5.3 The stiffness of fabric relates to its resistance to bending with further processing and use. It measures the fiber and yarn bending capabilities, the cohesion of individual fibers and yarns relative to their displacement and binders or finishes that hold them in place.

    1. Scope

    1.1 This test method covers the determination of the stiffness of fabrics by measuring the force required to push a specimen into a slot of predetermined width with a metal blade working at a predetermined capacity.

    Note 1: For other methods for testing stiffness, refer to Test Methods D1388, D4032, and D5732.

    1.2 This test method is applicable to fabrics of any fiber content whose stiffness does not exceed the capacity of the Penetrator Beam apparatus. Specimens can be taken from fabrics, rolls, or end products.

    1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

    1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

    1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

    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

    D1388 Test Method for Stiffness of Fabrics

    D1776 Practice for Conditioning and Testing Textiles

    D2904 Practice for Interlaboratory Testing of a Textile Test Method that Produces Normally Distributed Data

    D2906 Practice for Statements on Precision and Bias for Textiles

    D4032 Test Method for Stiffness of Fabric by the Circular Bend Procedure

    D4850 Terminology Relating to Fabrics and Fabric Test Methods

    D5732 Test Method for Stiffness of Nonwoven Fabrics Using the Cantilever Test

    ICS Code

    ICS Number Code 59.080.30 (Textile fabrics)

    UNSPSC Code

    UNSPSC Code 11160000(Fabrics and leather materials)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D6828-02R19

    Citation Format

    ASTM D6828-02(2019), Standard Test Method for Stiffness of Fabric by Blade/Slot Procedure, ASTM International, West Conshohocken, PA, 2019, www.astm.org

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