In the testing standard for rigid foam plastics, today's version of "ASTM D1621" was replaced by the 2016 version of the 2010 version. In fact, foam foam compression performance related standards are also many, such as ISO 604, ASTM, D695 and so on.

Rigid foam compressive compressive strength can be characterized by the rigid foam resistance compression strength and compression failure, can also be understood as foam specimen rupture in compression test (brittle material) or yield (non brittle material) high compression stress. The area used in the calculation is the original cross sectional area of the specimen. In the case where there is no apparent yield point, the compressive stress at the pre-set offset yield point can be defined.

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