Density - ASTM D4883

Density is the mass of a material per unit volume.

This method utilizes ultrasound for determining the density of polyethylene. Inorganic materials present in a resin have little effect on ultrasonic density so this essentially measures the density of the base resin.

Density can be converted to specific gravity by dividing the density (in g/cm3) by 0.9975.

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