Patent US4469543A successfully refreshed from Google Patents.
US4469543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamination of highly reinforced thermoplastic composites
Assignee: Honeywell International Inc
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Filing: 1980-04-22
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Granted: 1984-09-04
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Expires: 2000-04-22
Abstract
Abstract Disclosed is a method for preparing laminated thermoplastic composite structures comprised of at least one filler reinforced thermoplastic layer and at least one reinforcing layer of glass-fiber mat contiguous to at least one surface of said reinforced layer wherein an intermediate non-reinforced polymeric layer is applied between each glass-fiber mat/reinforced layer interface thereby achieving thorough impregnation of the glass-fiber mat with thermoplastic resin.
Inventors
- 👤 Leon Segal
- 👤 Anthony Testa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:55
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/50; B29C70/504; B29C70/506; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/12; B32B27/34; B32B27/36; B32B38/00; B32B38/08; B29K; B29K2077/00; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/16; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2262/00; B32B2262/10; B32B2262/101; B32B2367/00; Y; Y10; Y10T; Y10T442/00; Y10T442/60; Y10T442/674
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
191 words
A method of continuously laminating a polyamide sheet comprised of at least one layer of filler reinforced polyamide resin contiguous to a resin impregnated reinforcing glass mat, comprising steps of: feeding at least one layer of filler reinforced polyamide resin between a pair of laminating rolls, said one layer heated to above its melt temperature; feeding a layer of fiberglass mat between the pair of laminating rolls with the at least one layer of filler reinforced polyamide; feeding a layer of unfilled polymer between the fiberglass mat and each filler reinforced polyamide layer, said unfilled polymer layer being heated to at least its melt temperature, less viscous than the filler reinforced layer, and compatible with the polyamide of the filler reinforced polyamide layer to the laminating rolls; and laminating the at least one layer of filler reinforced polyamide layer to the layer of glass mat, with layers of unfilled polymer between the fiberglass mat and each filler reinforced polyamide layer, between the laminating rolls, whereby the less viscous, heated, unfilled polymer layer is thoroughly impregnated into the glass mat and each filler reinforced polyamide layer adheres to the impregnated glass mat.
Claim 2
Independent Claim
191 words
A method of continuously laminating a polyamide sheet comprised of at least one layer of filler reinforced polyamide resin contiguous to a resin impregnated reinforcing glass mat, comprising steps of: feeding at least one layer of filler reinforced polyamide resin between a pair of laminating rolls, said one layer heated to above its melt temperature; feeding a layer of fiberglass mat between the pair of laminating rolls with the at least one layer of filler reinforced polyamide; feeding a layer of unfilled polymer between the fiberglass mat and each filler reinforced polyamide layer, said unfilled polymer layer being heated to at least its melt temperature, less viscous than the filler reinforced layer, and compatible with the polyamide of the filler reinforced polyamide layer to the laminating rolls; and laminating the at least one layer of filler reinforced polyamide layer to the layer of glass mat, with layers of unfilled polymer between the fiberglass mat and each filler reinforced polyamide layer, between the laminating rolls, whereby the less viscous, heated, unfilled polymer layer is thoroughly impregnated into the glass mat and each filler reinforced polyamide layer adheres to the impregnated glass mat.
Claim 3
Dependent Claim
28 words
The method of claim 1 wherein the polyamide is selected from the group consisting of polyepsiloncaprolactam and a polyamide containing units derived from hexamethylene diamine and adipic acid.
Claim 4
Dependent Claim
10 words
The method of claim 2 wherein the polyamide is polyepsiloncaprolactam.
Claim 5
Dependent Claim
15 words
The method of claim 1 wherein the non-reinforced polymeric layer is introduced as a film.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein the non-reinforced polymeric layer is introduced as a powder.
Claim 7
Dependent Claim
15 words
The method of claim 1 wherein the non-reinforced layer is introduced in a molten state.
Claim 8
Dependent Claim
29 words
The method of claim 1 wherein each reinforced layer is comprised of polyepsiloncaprolactam, from 5 to 40 wt.% particulate filler and from 5 to 40 wt.% short glass fiber.
Claim 9
Dependent Claim
25 words
The method of claim 1 wherein the composite structure is comprised of two reinforced polyamide layers having a glass-fiber mat sandwiched between said reinforced layers.
Claim 10
Dependent Claim
17 words
The method of claim 8 wherein the non-reinforced polymeric layers are comprised of one or more polyamides.
Claim 11
Independent Claim
189 words
A method of continuously laminating a thermoplastic sheet comprised of at least one layer of filler reinforced thermoplastic resin contiguous to a resin impregnated reinforcing glass mat, comprising the steps of: feeding at least one layer of filler reinforced thermoplastic resin between a pair of laminating rolls, said one layer heated to above its melt temperature; feeding a layer of fiberglass mat between the pair of laminating rolls with the at least one layer of filler reinforced thermoplastic; feeding a layer of unfilled polymer between the fiberglass mat and each filler reinforced thermoplastic layer, said unfilled polymer layer being heated to at least its melt temperature, less viscous than the filler reinforced thermoplastic layer, and compatible with the thermoplastic of the filler reinforced thermoplastic layer; and laminating the at least one layer of filler reinforced thermoplastic layer to the layer of glass mat, with layers of unfilled polymer between the fiberglass mat and each filler reinforced thermoplastic layer, between the laminating rolls, whereby the less viscous, heated, unfilled polymer layer is thoroughly impregnated into the glass mat and each filler reinforced thermoplastic layer adheres to the impregnated glass mat.
Claim 12
Independent Claim
189 words
A method of continuously laminating a thermoplastic sheet comprised of at least one layer of filler reinforced thermoplastic resin contiguous to a resin impregnated reinforcing glass mat, comprising the steps of: feeding at least one layer of filler reinforced thermoplastic resin between a pair of laminating rolls, said one layer heated to above its melt temperature; feeding a layer of fiberglass mat between the pair of laminating rolls with the at least one layer of filler reinforced thermoplastic; feeding a layer of unfilled polymer between the fiberglass mat and each filler reinforced thermoplastic layer, said unfilled polymer layer being heated to at least its melt temperature, less viscous than the filler reinforced thermoplastic layer, and compatible with the thermoplastic of the filler reinforced thermoplastic layer; and laminating the at least one layer of filler reinforced thermoplastic layer to the layer of glass mat, with layers of unfilled polymer between the fiberglass mat and each filler reinforced thermoplastic layer, between the laminating rolls, whereby the less viscous, heated, unfilled polymer layer is thoroughly impregnated into the glass mat and each filler reinforced thermoplastic layer adheres to the impregnated glass mat.
Claim 13
Dependent Claim
29 words
The method of claim 10 wherein the thermoplastic is selected from the group consisting of polyamides, polyesters, olefinic polymers, vinyl polymers, cellulosic polymers, polyurethanes, polysulfones, polyacetals, and phenoxy resins.
Claim 14
Dependent Claim
20 words
The method of claim 11 wherein the thermoplastic is selected from the group consisting of polyamides, polyesters, and olefinic polymers.
Claim 15
Dependent Claim
20 words
The method of claim 10 wherein the thermoplastic resin of the reinforced layer and intermediate polymeric layers are both polyesters.
Claim 16
Dependent Claim
11 words
The method of claim 13 wherein the polyester is polyethylene terephthalate.
Claim 17
Dependent Claim
19 words
The method of claim 10 wherein the thermoplastic is a polyamide and the intermediate polymeric layer is a polyester.
Claim 18
Dependent Claim
16 words
The method of claim 15 wherein the polyamide is polyepsiloncaprolactam and the polyester is polyethylene terephthalate.
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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) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |