ASTM D7842/D7842M Holding Strength of Tack and Prong Fastener Attached Buttons

ASTM D7842M-12 explains the measurement of the holding strength of a tack and prong fastener attached button with the help of a tensile testing machine. The buttons are attached to the fabric in the way they are normally used. This test method is applicable to buttons of fabric that are used in apparel. SI units are preferred in stating the values.

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    Scope:

    ASTM D7842/D7842M determines the compatibility of tack attached buttons or prong fastener attached buttons to fabrics. These fabrics are normally used in apparel etc. The buttons are attached to the fabric in the way they will be used. It is also used for acceptance testing of commercial shipments of garments with attached buttons.

    Procedure:

    As per ASTM D7842/D7842M testing, a specimen is mounted in a specific test fixture on a tensile testing machine. A force is applied perpendicularly until the button separates from the tack or prong fastener. The peak force at the time of separation is considered as the holding strength. If the fabric tears, the peak force at fabric failure is measured and reported.

    Video 01: Overview of a tensile testing machine

    Specimen details:

    The button’s size should be appropriate to the type of fabric.

    Result:

    In this way, by performing the ASTM D7842/D7842M test, the holding strength of the tack and prong fastener is measured. 

    Conclusion:

    ASTM D7842/D7842M determines the compatibility of tack attached buttons or prong fastener attached buttons to fabrics.

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