US4263247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin-foam laminate
Assignee: Tenneco Foam Products Co
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Filing: 1976-12-13
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Granted: 1981-04-21
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Expires: 1996-12-13
Abstract
Abstract Laminates of resinous polymers of olefins and elastomeric, open celled polyester urethane foams and method and apparatus of their production. Examples of resinous polymers include polyethylene, copolymers of ethylene and propylene, polypropylene, polystyrene and impact polystyrene. Optionally, the foam can be provided with a plasticized vinyl or fabric layer, opposite the surface to which the polyolefin is applied.
Inventors
- 👤 Joseph C. Berger
- 👤 James E. Fitzpatrick
- 👤 James P. Whelan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:24
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29C43/30; B29C43/305; B29C44/00; B29C44/34; B29C44/56; B29C45/00; B29C45/14; B29C45/14778; B29C45/14795
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
86 words
A process of injection molding for forming a web laminate comprising a resinous olefin polymer substrate and an elastomeric open celled polyester urethane foam web, said process comprising: (a) Placing a first surface of said foam against a portion of a surface of an injection mold cavity; (b) injecting against a second surface of said foam a molten resinous olefin polymer at a lower temperature than the melting point temperature of said foam into said mold cavity; and (c) allowing the resultant web laminate to cool.
Claim 2
Dependent Claim
86 words
A process of injection molding for forming a web laminate comprising a resinous olefin polymer substrate and an elastomeric open celled polyester urethane foam web, said process comprising: (a) Placing a first surface of said foam against a portion of a surface of an injection mold cavity; (b) injecting against a second surface of said foam a molten resinous olefin polymer at a lower temperature than the melting point temperature of said foam into said mold cavity; and (c) allowing the resultant web laminate to cool.
Claim 3
Dependent Claim
70 words
The process of claim 1, wherein the resinous olefin polymer is selected from the group consisting of: polyethylene and copolymers of ethylene and propylene having a melt index in the range 0.25-25 grams/10 min.; polypropylene and copolymers of propylene and ethylene having a flow rate in the range 0.5-25 grams/10 min.; and, polystyrene and impact polystyrene or rubber modified polystyrene having a flow rate in the range 2-30 grams/10 min.
Claim 4
Dependent Claim
54 words
The process of claim 1 wherein said resinous olefin polymer is polystyrene having a flow rate in the range of 5-15 grams/10 minutes and a specific gravity in the range of 0.95-1.05; and the temperature and pressure at which said polystyrene is injected are in the ranges of 325°-535° F., and 500-600 psi., respectively.
Claim 5
Dependent Claim
54 words
The process of claim 1 wherein said resinous olefin polymer is polypropylene having a flow rate in the range of 0.5-13 grams/10 minutes and a specific gravity in the range of 0.9-0.95; and the temperature and pressure at which said polypropylene is injected are in the ranges of 400°-550° F., and 300-9000 psi., respectively.
Claim 6
Dependent Claim
45 words
The process of claim 1, wherein said open celled foam has a coating on a first side, and wherein said foam is positioned within the injection mold cavity so that a second surface of said foam will be contacted with the injected resinous olefin polymer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |