Method and apparatus for extruding a low density thermoplastic foam
AssigneeAmesbury Industries, Inc.
InventorsLouis Halberstadt, Peter E. Mertinooke, Joseph V. Perry, Dan C. Muessel
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Abstract
A process and apparatus are described for extruding a soft, low density elastomeric thermoplastic foam. A single screw extruder having a very large screw length to diameter ratio is provided to thoroughly mix the thermoplastic elastomer with a blowing agent. A thin, substantially taperless die is also provided to form extruded profiles. By using such a process and apparatus, a variety of complex-shaped extruded profiles may be easily produced.
Claims5
A soft, low density elastomeric thermoplastic foam having a density less than 20 lbs/ft.sup.3 and foamed from a thermoplastic elastomer having a Shore A hardness of 64 or less and comprising a blend of a polyolefin resin and a vulcanized monoolefin copolymer rubber.
Dependencies are inferred from the claim text.