1. Scope

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 1There 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.

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

D4000 Classification System for Specifying Plastic Materials

D5947 Test Methods for Physical Dimensions of Solid Plastics Specimens

D6287 Practice for Cutting Film and Sheeting Test Specimens

D6988 Guide for Determination of Thickness of Plastic Film Test Specimens

E2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids

Keywords

film; orientation release stress; shrink force; shrink tension; thin sheeting; Force; Heating tests--plastics; Heat-shrinkable plastic film/sheeting; Orientation release stress; Plastic sheet and film; Shrinkage--plastics; Shrink force; Stress--plastics; Tensile properties/testing--plastics; Thermoplastics; Thin sheeting;

ICS Code

ICS Number Code 83.140.10 (Films and sheets)

DOI: 10.1520/D2838-08

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