ANSI/ASTM D2838-1997 塑料薄膜和薄板收缩张力及定向释放应力试验方法

标准号：ANSI/ASTM D2838-1997
中文标准名称：塑料薄膜和薄板收缩张力及定向释放应力试验方法
英文标准名称：Test Method for Shrink Tension and Orientation Release Stress of Plastic Film and Thin Sheeting
标准类型：G31
发布日期：1999/12/31 12:00:00
实施日期：1997/3/5 12:00:00
中国标准分类号：G31
国际标准分类号：83.140.10
适用范围：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: 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. 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. Orientation release stress can be determined from the data obtained using Procedure A. 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 equivalent ISO test method. 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.