ASTM D1622 – Standard Test Method for Apparent Density of Rigid Cellular Plastics
Description:
Significance and Use
4.1 If the material to be tested includes forming skins, the apparent overall density, or the apparent core density, or both, shall be determined. If the material does not have forming skins, the term overall density is not applicable.
4.2 This test method is also applicable to spray foam materials.
4.3 Before proceeding with this test method, reference shall be made to the specification of the material being tested. Any test specimen preparation, conditioning, dimensions, or testing parameters, or combination thereof, covered in the relevant ASTM materials specification shall take precedence over those mentioned in this test method. If there are no relevant ASTM material specifications, then the default conditions in this method apply.
4.4 When density or apparent density is used in reference to a cellular plastic, without further qualification, it shall be interpreted as follows:
4.4.1 density—shall be interpreted as being the apparent overall density if the material is to be used with forming skins intact.
4.4.2 density—shall be interpreted as the apparent core density if the forming skins have been, or will be, removed before the material is used.
Scope
1.1 This test method covers the density of a cellular plastic. Density can be evaluated as the apparent overall density (includes forming skins) or by apparent core density (forming skins removed).
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.
ASTM D1621