US4531994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing a thermoformable laminate structure
Assignee: Monsanto Co
•
Filing: 1984-09-04
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Granted: 1985-07-30
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Expires: 2004-09-04
Abstract
Abstract A process for preparing thermoformable laminate structure comprising foamed thermoplastic sheet having a fabric adhesively bonded to one surface thereof.
Inventors
- 👤 James S. Holtrop
- 👤 Richard P. Maurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:34
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/32; B32B27/00; B32B27/12; G; G10; G10K; G10K11/00; G10K11/16; G10K11/162; G10K11/168; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T442/00; Y10T442/60; Y10T442/647
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
125 words
A process for forming a moldable thermoformable laminate structure having polymer impregnated cloth adhered to at least one side of a sheet of thermoplastic foam comprising (a) applying a polymer emulsion film to a surface of a sheet of thermoplastic foam; (b) allowing the emulsion film to dry by evaporation of emulsion liquids; (c) applying a cloth to the dry emulsion film; (d) impregnating the cloth with the polymer of the film by applying heat and pressure to the surface of the cloth whereby the polymer becomes plastic and impregnates the cloth; (e) and adhering the cloth to the sheet of film of plastic foam by removing said heat and pressure from the surface of the cloth, thereby allowing the polymer to cool and solidify.
Claim 2
Dependent Claim
125 words
A process for forming a moldable thermoformable laminate structure having polymer impregnated cloth adhered to at least one side of a sheet of thermoplastic foam comprising (a) applying a polymer emulsion film to a surface of a sheet of thermoplastic foam; (b) allowing the emulsion film to dry by evaporation of emulsion liquids; (c) applying a cloth to the dry emulsion film; (d) impregnating the cloth with the polymer of the film by applying heat and pressure to the surface of the cloth whereby the polymer becomes plastic and impregnates the cloth; (e) and adhering the cloth to the sheet of film of plastic foam by removing said heat and pressure from the surface of the cloth, thereby allowing the polymer to cool and solidify.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein said sheet of thermoplastic foam comprises polystyrene or a copolymer of polystyrene.
Claim 4
Dependent Claim
21 words
The process of claim 2 wherein said polymer emulsion comprises an acrylic polymer having a softening temperature greater than 75° C.
Claim 5
Dependent Claim
27 words
The process of claim 3 wherein said emulsion film is applied to the sheet in an amount between 5 and 8 grams of liquid per square meter.
Claim 6
Dependent Claim
12 words
The process of claim 4 wherein the cloth comprises a non-woven fabric.
Claim 7
Dependent Claim
90 words
A process for providing a moldable, thermoformable laminate structure having polymer impregnated cloth adhered to at least one side of a sheet of thermoplastic foam comprising: (a) applying a polymer emulsion film to a surface of a sheet of thermoplastic foam; (b) applying a cloth to the emulsion film and allowing the polymer to impregnate the cloth; and (c) adhering the cloth to the sheet by applying heat and pressure whereby the emulsion solids become plastic and removing the heat and pressure to allow the polymer to cool and solidify.
Claim 8
Dependent Claim
90 words
A process for providing a moldable, thermoformable laminate structure having polymer impregnated cloth adhered to at least one side of a sheet of thermoplastic foam comprising: (a) applying a polymer emulsion film to a surface of a sheet of thermoplastic foam; (b) applying a cloth to the emulsion film and allowing the polymer to impregnate the cloth; and (c) adhering the cloth to the sheet by applying heat and pressure whereby the emulsion solids become plastic and removing the heat and pressure to allow the polymer to cool and solidify.
Claim 9
Dependent Claim
20 words
The process of claim 6 wherein the polymer emulsion film is allowed to dry prior to applying heat and pressure.
Claim 10
Dependent Claim
18 words
The process of claim 6 wherein the sheet of thermoplastic foam comprises polystyrene or a copolymer of polystyrene.
Claim 11
Dependent Claim
26 words
The process of claim 8 wherein the polymer emulsion film comprises an acrylic polymer emulsion wherein said polymer has a softening temperature greater than 75° C.
Claim 12
Dependent Claim
37 words
The process of claim 9 wherein the polymer emulsion film is applied to the surface of a sheet of thermoplastic foam at a level between 5 and 8 grams of liquid per square meter of thermoplastic foam.
Claim 13
Dependent Claim
12 words
The process of claim 10 wherein the cloth is a non-woven cloth.
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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) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |