ASTM-D3769 › Standard Test Method for Microcellular Urethanes—High-Temperature Sag
The following bibliographic material is provided to assist you with your purchasing decision:
Scope
1.1 This test method covers the procedure and apparatus for measuring high-temperature sag of microcellular urethane materials.
1.2 The values stated in SI units are to be regarded as 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: There is no known ISO equivalent to this standard.
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.
Significance and Use
4.1 This test method is used to indicate the potential tendency of microcellular materials to deform during paint application in an assembly plant operation. Since a standard specimen is used, do not assume heat sag measurements to be exactly those which will occur on a part during or after the paint application and baking operation of an assembly process.
4.2 Before proceeding with this test method, reference shall be made to the specification of the material being tested. Any test specimen preparation, conditioning, or dimensions, or combination thereof, and testing parameters covered in the materials specification shall take precedence over those mentioned in these test methods. If there are no material specifications, then the default conditions apply.
Note 2: This test method is applicable to solid urethanes.
Keywords
deformation; heat sag; high-temperature; microcellular; sag; urethane;
To find similar documents by ASTM Volume:
08.02 (Plastics (II): D3222 - D5083)
To find similar documents by classification:
This document comes with our free Notification Service, good for the life of the document.
This document is available in either Paper or PDF format.
Customers who bought this document also bought:
ASTM-E84Standard Test Method for Surface Burning Characteristics of Building Materials
ASTM-D5426
Standard Practices for Visual Inspection and Grading of Fabrics Used for Inflatable Restraints
ASTM-E135
Standard Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials
Document Number
ASTM-D3769-20
Revision Level
2020 EDITION
Status
Current
Modification Type
Revision
Publication Date
July 15, 2020
Document Type
Test Method
Page Count
3 pages
Committee Number
D20.22