標準號：ANSI/ASTM D2838-1997
中文標準名稱：塑料薄膜和薄板收縮張力及定向釋放應力試驗方法
英文標準名稱：Test Method for Shrink Tension and Orientation Release Stress of Plastic Film and Thin Sheeting
標準類型：G31
發布日期：1999/12/31 12:00:00
實施日期：1997/3/5 12:00:00
中國標準分類號：G31
國際標準分類號：83.140.10
適用范圍：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.