Claims
- 1. An elastomeric thermoplastic foam, comprising a blend of a polyolefin resin and a vulcanized monoolefin copolymer rubber; wherein said foam has a density of less than about 20 lbs/ft.sup.3, and wherein said foam is extruded from a thermoplastic resin having a Shore A hardness of less than 72.
- 2. An elastomeric foam according to claim 1, further comprising a thin, low friction skin bonded to at least part of the surface of said foam.
- 3. The foam according to claim 2, wherein said skin comprises polyethylene.
- 4. The foam according to claim 2, wherein the density of said foam is between about 2 and about 19 lbs/ft.sup.3.
- 5. The foam according to claim 2, wherein said foam is attached to a stiffener.
- 6. The foam according to claim 5, wherein said stiffener comprises polypropylene.
Parent Case Info
This is a continuation of U.S. Ser. No. 08/394,597 (filed Feb. 27, 1995), which is a divisional of U.S. Ser. No 08,255,324 (filed Jun. 7, 1994, issued as U.S. Pat. No. 5,393,796), which is a continuation of U.S. Ser. No. 07/924,405, (filed Aug. 3, 1992) which is a continuation of U.S. Ser. No. 07/378,003 (filed Jul. 11, 1989).
US Referenced Citations (34)
Foreign Referenced Citations (2)
Number |
Date |
Country |
852 096 |
Sep 1978 |
CAX |
1 177 212 |
Nov 1984 |
CAX |
Non-Patent Literature Citations (4)
Entry |
"Extrusion of Processing SANTOPRENE.RTM. Thermoplastic Rubber", Monsanto Technical Paper. |
"Extrusion Foaming Technology for SANTOPRENE.RTM. Thermoplastic Rubber, Revised", Monsanto Technical Paper. |
"Foam Extrusion Technology for TP Elastomer", Plastic Technology, Feb. 1987. |
"Plastics Extrusion Technology Handbook", Sidney Levy, P.E. (1923). |
Divisions (1)
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Number |
Date |
Country |
Parent |
255324 |
Jun 1994 |
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Continuations (3)
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Number |
Date |
Country |
Parent |
394597 |
Feb 1995 |
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Parent |
924405 |
Aug 1992 |
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Parent |
378003 |
Jul 1989 |
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