ASTM D2732-2003
塑料薄膜和薄板的自由线性热收缩率的标准试验方法

Standard Test Method for Unrestrained Linear Thermal Shrinkage of Plastic Film and Sheeting


 

 

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标准号
ASTM D2732-2003
发布日期
2003
实施日期
废止日期
中国标准分类号
G33
国际标准分类号
83.140.10 (Films and sheets)
发布单位
US-ASTM
适用范围

As a result of the manufacturing process, internal stresses may be locked into the film which can be released by heating. The temperature at which shrinkage will occur is related to the processing techniques employed to manufacture the film and may also be related to a phase transition in the base resin. The magnitude of the shrinkage will vary with the temperature of the film.

Shrinkage of a particular material produced by a particular process may be characterized by this test method by making measurements at several temperatures through the shrinkage range of the material.

Following a characterization in a particular case, it is usually sufficient thereafter to measure shrinkage at only one selected temperature for purposes of process or quality control, or both.

1.1 This test method covers determination of the degree of unrestrained linear thermal shrinkage at given specimen temperatures of plastic film and sheeting of 0.76 mm [0.030 in.] thickness or less. This test method does not cover shrinkage from loss of solvent in some materials.

1.2 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.

Note 18212;This document is not equivalent to ISO 11501.





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