ASTM F521 - 16

    Standard Test Methods for Bond Integrity of Transparent Laminates

    Active Standard ASTM F521 | Developed by Subcommittee: F07.08

    Book of Standards Volume: 15.03

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    Significance and Use

    4.1 These test methods provide a means to measure quantitatively the bond integrity between the outer layers of the transparency and the interlayer, or to measure the cohesive properties of the interlayer, under various loading conditions.

    4.2 These test methods provide empirical results useful for control purposes, correlation with service results, and as quality control tests for acceptance of production parts.

    4.3 Test results obtained on small, laboratory-size samples shown herein are indicative of full-size part capability, but not necessarily usable for design purposes.

    1. Scope

    1.1 These test methods cover determination of the bond integrity of transparent laminates. The laminates are usually made of two or more glass or hard plastic sheets held together by an elastomeric material. These test methods are intended to provide a means of determining the strength of the bond between the glass or plastic and the elastomeric interlayer under various mechanical or thermal loading conditions.

    1.2 The test methods appear as follows:

    Test Methods


    Test Method A—Flatwise Bond Tensile Strength

    5 – 11

    Test Method B—Interlaminar Shear Strength

    12 – 17

    Test Method C—Creep Rupture

    18 – 25

    Test Method D—Thermal Exposure

    26 – 30

    1.3 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.

    ANSI Standard

    B1.1 Standard for Unified Screw Threads

    ASTM Standards

    D952 Test Method for Bond or Cohesive Strength of Sheet Plastics and Electrical Insulating Materials

    ICS Code

    ICS Number Code 49.025.40 (Rubber and plastics)

    UNSPSC Code

    UNSPSC Code 25200000(Aerospace systems and components and equipment)

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

    DOI: 10.1520/F0521-16

    Citation Format

    ASTM F521-16, Standard Test Methods for Bond Integrity of Transparent Laminates, ASTM International, West Conshohocken, PA, 2016,

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