Extruded propylene-resin composite foam

Details Extruded propylene-resin composite foam Extruded propylene-resin composite foam

2011-06-28

2011-06-28

Vo, Hai (Department: 1788)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

C428S317900, C525S240000

Reexamination Certificate

active

07968180

ABSTRACT:
The extruded propylene-based resin composite foam (1) according to the present invention is provided by extrusion-foaming a molding material containing a propylene-based resin. The propylene-based resin forming the extruded foam has an olefin-based polymer whose loss tangent (tan δ) is 0.04 to 100 at a temperature of 298 K and a frequency of 10 Hz. The molding material includes a fibrous filler in an amount of more than 0 mass % and 60 mass % or less of the entirety of the molding material. The extruded composite foam (1) includes: first extruded foam (2) whose closed cell content is 40 percent or more and whose expansion ratio is 10 or more; and second extruded foam (3) whose closed cell content is less than 40 percent and whose expansion ratio is 10 or more.

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Kawata Mfg Co,. Ltd., Urethane Foam-RIM Machine, MCF (Micro Cellular Foam)—RIM, Catalogue No. 3N-03, 2 pages (with English translation).
Toshimasa Ota, et al., “Processing and cell nucleation control for low density polypropylene foam by using of a MCF-EXT system”, 3 pages (with English Abstract).

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