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    ASTM D2861 - 14

    Standard Test Methods for Flexible Composites of Copper Foil with Dielectric Film or Treated Fabrics

    Active Standard ASTM D2861 | Developed by Subcommittee: D09.07

    Book of Standards Volume: 10.02

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    Significance and Use

    7.1 The electrical and mechanical characteristics of circuits produced from flexible composites of copper foil with dielectric materials will, to a large extent, depend on the properties of the dielectric portion of the composite. Measurement of these properties is essential for predicting performance of the circuit.

    1. Scope

    1.1 These test methods cover procedures for testing flexible materials consisting of copper foil combined with either dielectric film or with treated or impregnated fabric to form flexible composites used in the manufacture of flexible or multilayer circuitry, or both.

    1.2 The procedures appear as follows:



    ASTM Reference Method




    Flex Life of the Composite

    20 – 25


    Peel Strength of the Composite

    11 – 19


    Specimen Preparation



    Strain Relief Due to Etching

    26 – 32


    Testing of the Dielectric Portion of      the Composite

    7 – 10

    D1825, D2305, D902  

    1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that 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 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

    D902 Test Methods for Flexible Resin-Coated Glass Fabrics and Glass Fabric Tapes Used for Electrical Insulation

    D1711 Terminology Relating to Electrical Insulation

    D1825 Practice for Etching and Cleaning Copper-Clad Electrical Insulating Materials and Thermosetting Laminates for Electrical Testing

    D2305 Test Methods for Polymeric Films Used for Electrical Insulation

    D6054 Practice for Conditioning Electrical Insulating Materials for Testing

    ICS Code

    ICS Number Code 77.150.30 (Copper products)

    UNSPSC Code

    UNSPSC Code 30102009(Copper foil)

    Referencing This Standard

    DOI: 10.1520/D2861-14

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM D2861-14, Standard Test Methods for Flexible Composites of Copper Foil with Dielectric Film or Treated Fabrics, ASTM International, West Conshohocken, PA, 2014,

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