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Significance and Use
4.1 This test method is particularly applicable to nonrigid thermoplastic sheeting or film made by the calender or extrusion process. The test gives an indication of lot-to-lot uniformity in regards to the degree of internal strains introduced during processing.
4.2 The heating medium in this test method is air and does not necessarily yield the same results as Test Method , which uses a liquid medium.
4.3 Before proceeding with this test method, review the specifications of the material being tested, if available. Any test specimen preparation, conditioning, dimensions, or testing parameters, or combination thereof, covered in the relevant ASTM material specification shall take precedence over those mentioned in this test method. If there are no relevant ASTM material specifications, then the default conditions apply. Table 1 of Classification System lists the ASTM material standards that currently exist.
1.1 This test method covers the measurement of changes in linear dimensions of nonrigid thermoplastic sheeting or film that result from exposure of the material to specified conditions of elevated temperature and time.
1.2 The values stated in SI units are to be regarded as the standard.
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: This test method and address the same matter, but differ in technical content (and results cannot be directly compared between the two methods).
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D618 Practice for Conditioning Plastics for Testing
D883 Terminology Relating to Plastics
D2732 Test Method for Unrestrained Linear Thermal Shrinkage of Plastic Film and Sheeting
D4000 Classification System for Specifying Plastic Materials
ICS Number Code 83.140.10 (Films and sheets)
UNSPSC Code 13111200(Films); 30265802(Plastic sheet)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D1204-14(2020), Standard Test Method for Linear Dimensional Changes of Nonrigid Thermoplastic Sheeting or Film at Elevated Temperature, ASTM International, West Conshohocken, PA, 2020, www.astm.orgBack to Top