C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 9/12 (2006.01) B29C 44/56 (2006.01) C08J 5/18 (2006.01) C08J 9/14 (2006.01)
Patent
CA 2078123
A thermoformable, rigid or semi-rigid polypropylene foam sheet having a smooth surface and a uniform cell structure and a density of at least 2.5 lbs/ft3 is prepared by extruding a mixture of a nucleating agent, a physical blowing agent and a polypropylene resin having a high melt strength and high melt elasticity.
Gaylord Norman G.
Katz Leon
Park John P.
Moffat & Co.
The James River Corporation
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