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    ASTM D5419 - 14a

    Standard Test Method for Environmental Stress Crack Resistance (ESCR) of Threaded Plastic Closures

    Active Standard ASTM D5419 | Developed by Subcommittee: D20.19

    Book of Standards Volume: 08.03

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    Significance and Use

    5.1 This test method compares closures for ESCR. Suitable variables are: closure materials, closure designs, processes, applied torque, and stress-crack agents.

    5.2 Results can be used for estimating shelf life of closures in terms of ESCR. This requires that the user has calibrated failure time in this test to failure time in the field for actual packaging systems.

    1. Scope

    1.1 This test method determines the susceptibility of threaded plastic closures to failure due to environmental stress cracking (ESC).

    1.2 In use, threaded plastic closures can contact agents that appreciably reduce the stress at which cracks form. Examples of such agents are: soaps, detergents, oils, and liquid bleaches.

    1.3 Major factors that influence environmental stress crack resistance (ESCR) of threaded plastic closures include the closure material(s), closure design, molded-in stress, and applied stress.

    1.4 This procedure can be applied to all closures, but is particularly applicable to closures made from plastics based on polypropylene (PP) or polystyrene (PS).

    1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

    1.6 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. Specific precautionary statements are given in Section 8 and 6.2.

    Note 1: There is no known ISO equivalent to this standard.

    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

    D618 Practice for Conditioning Plastics for Testing

    D883 Terminology Relating to Plastics

    D1600 Terminology for Abbreviated Terms Relating to Plastics

    D2911 Specification for Dimensions and Tolerances for Plastic Bottles

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

    UNSPSC Code

    UNSPSC Code 13100000(Rubber and elastomers)

    Referencing This Standard

    DOI: 10.1520/D5419-14A

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM D5419-14a, Standard Test Method for Environmental Stress Crack Resistance (ESCR) of Threaded Plastic Closures, ASTM International, West Conshohocken, PA, 2014,

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