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Full Description

1.1 This test method covers the determination of the shrink tension and related characteristics, that is, shrink force and orientation release stress, of heat-shrinkable plastic film and sheeting of less than 1.0 mm (0.04 in.) thickness. Two procedures are described that permit the measurement of shrink forces at predetermined temperatures. They are as follows:

1.1.1 Procedure A is designed to measure the maximum force exerted by a specimen that is totally restrained from shrinking as it is heated rapidly to a specific temperature.

1.1.2 Procedure B is designed to measure the maximum force exerted by a specimen that is permitted to shrink a predetermined amount prior to restraint while being heated rapidly to a specific temperature.

1.2 Orientation release stress can be determined from the data obtained using Procedure A.

1.3 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.

Note 1 - There is no known ISO equivalent to this test method.

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.

 

Document History

  1. ASTM D2838-18


    Standard Test Method for Shrink Tension and Orientation Release Stress of Plastic Film and Thin Sheeting

    • Most Recent
  2. ASTM D2838-09e1


    Standard Test Method for Shrink Tension and Orientation Release Stress of Plastic Film and Thin Sheeting (Withdrawn 2018)

    • Historical Version
  3. ASTM D2838-09


    Standard Test Method for Shrink Tension and Orientation Release Stress of Plastic Film and Thin Sheeting

    • Historical Version
  4. ASTM D2838-08

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    Standard Test Method for Shrink Tension and Orientation Release Stress of Plastic Film and Thin Sheeting

    • Historical Version
  5. ASTM D2838-07


    Standard Test Method for Shrink Tension and Orientation Release Stress of Plastic Film and Thin Sheeting

    • Historical Version
  6. ASTM D2838-02


    Standard Test Method for Shrink Tension and Orientation Release Stress of Plastic Film and Thin Sheeting

    • Historical Version
  7. ASTM D2838-95


    Standard Test Method for Shrink Tension and Orientation Release Stress of Plastic Film and Thin Sheeting

    • Historical Version