Standard Test Method for Bulk Density And Specific Gravity of Plastic Lumber and Shapes by Displacement

Importancia y uso:

5.1 The specific gravity or density of a solid is a property that can be measured conveniently to follow physical changes in a sample, to indicate degree of uniformity among different sampling units or specimens, or to indicate the average density of a large item.

5.2 It is possible that variations in density of a particular plastic lumber or shapes specimen will be due to changes in crystallinity, loss of plasticizer/solvent content, differences in degree of foaming, or to other causes. It is possible that portions of a sample will differ in density because of difference in crystallinity, thermal history, porosity, and composition (types or proportions of resin, plasticizer, pigment, or filler).

Note 3: Reference is made to Test Method D1622/D1622M.

5.3 Density is useful for calculating strength to weight and cost to weight ratios.

5.4 If the cross-sectional area of the specimen is required for future testing on a particular sample, it is acceptable to determine it from a specific gravity measurement, see Eq 4.

Subcomité:

D20.20

Referida por:

D6117-23, D6108-24

Volúmen:

08.03

Número ICS:

83.140.01 (Rubber and plastic products in general)

Palabras clave:

density; plastic lumber; plastic shapes; recycled plastic; specific gravity;