US4873133A
Expired / Lapsed
US
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Fiber reinforced stampable thermoplastic sheet
Assignee: General Electric Co
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Filing: 1986-09-11
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Granted: 1989-10-10
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Expires: 2006-09-11
Abstract
Abstract Fiber reinforced thermoplastic articles having an improved surface are produced in a stampable sheet which is produced from a reinforcing fiber mat having a thermoplastic support film.
Inventors
- 👤 Harold F. Giles, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:57
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B32; B32B; B32B27/00; B32B27/12; B29C70/086; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/0854; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2305/00; B32B2305/08; B32B2307/00; B32B2307/40; B32B2307/41; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314; Y10T428/1317; Y10T428/1321; Y10T428/1352; Y10T428/1362; Y10T428/1366; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24091; Y10T428/24124; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/24995; Y10T428/27; Y10T428/30; Y10T428/31504; Y10T428/31507
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
94 words
A fiber reinforced stampable sheet obtained by laminating (a) a thermoplastic resin surface layer and (b) a reinforcing fiber mat comprising (i) a thermoplastic resin support film having a melting point below the temperature of lamination and (ii) long fibers penetrating the support film and positioned by said support film, a major portion of said long fibers being positioned on one side of said support film, a minor portion of said long fibers being positioned on an opposite side of said support film, said minor portion of fibers being positioned adjacent said surface layer.
Claim 2
Dependent Claim
94 words
A fiber reinforced stampable sheet obtained by laminating (a) a thermoplastic resin surface layer and (b) a reinforcing fiber mat comprising (i) a thermoplastic resin support film having a melting point below the temperature of lamination and (ii) long fibers penetrating the support film and positioned by said support film, a major portion of said long fibers being positioned on one side of said support film, a minor portion of said long fibers being positioned on an opposite side of said support film, said minor portion of fibers being positioned adjacent said surface layer.
Claim 3
Dependent Claim
22 words
A fiber reinforced stampable sheet as in claim 1 wherein the thermoplastic resin support film has a thickness less than 50 mils.
Claim 4
Dependent Claim
26 words
A fiber reinforced stampable sheet as in claim 1 wherein the fibers of said reinforcing mat have an average length of at least about 1.0 inch.
Claim 5
Dependent Claim
25 words
A fiber reinforced stampable sheet as in claim 1 wherein said minor portion is from about 1% to about 45% by weight of said fibers.
Claim 6
Dependent Claim
25 words
A fiber reinforced stampable sheet as in claim 1 wherein said minor portion is from about 1% to about 15% by weight of said fibers.
Claim 7
Dependent Claim
29 words
A fiber reinforced stampable sheet as in claim 5 wherein said fibers are selected from the group consisting of cross-linked organic fibers, conductive fibers, carbon fibers, and glass fibers.
Claim 8
Dependent Claim
26 words
A fiber reinforced stampable sheet as in claim 6 wherein said fibers are glass and are of an average length of at least about 1.0 inch.
Claim 9
Dependent Claim
21 words
A fiber reinforced stampable sheet as in claim 7 wherein the fibers comprises bundles of 20 to about 2000 glass filaments.
Claim 10
Dependent Claim
27 words
A fiber reinforced stampable sheet as in claim 6 wherein said reinforcing fiber mat has a weight of about 0.3 to about 10 ounces per square foot.
Claim 11
Dependent Claim
35 words
A fiber reinforced stampable sheet as in claim 5 wherein the thermoplastic resin support film is comprised of a thermoplastic resin with a melting point below the melting point of the thermoplastic resin support layer.
Claim 12
Dependent Claim
48 words
A fiber reinforced stampable sheet as in claim 5 wherein said thermoplastic support film and thermoplastic resin layer are each comprised of a thermoplastic resin independently selected from the group consisting of polycarbonates, polyamides, polyesters, poly(phenylene oxides), poly(etherimides), polyolefins, epoxy resins, poly(phenylene sulfides), polysulfones, polyurethanes and mixtures thereof.
Claim 13
Dependent Claim
23 words
A fiber reinforced stampable sheet as in claim 5 wherein said thermoplastic film has a thickness of from about 0.5 to 20 mils.
Claim 14
Dependent Claim
38 words
A fiber reinforced stampable sheet as in claim 1 wherein the percentage of fiber ends on the side of said thermoplastic support film is about equal to or greater than the weight percentage of fibers on that side.
Claim 15
Dependent Claim
24 words
A fiber reinforced stampable sheet as in claim 13 wherein the fibers of said reinforcing fiber mat are needled through the thermoplastic support film.
Claim 16
Dependent Claim
32 words
A fiber reinforced stampable sheet as in claim 1 wherein the concentration of fibers ranges from about 5% to about 60% by weight of the total weight of fiber reinforced stampable sheet.
Claim 17
Dependent Claim
21 words
A fiber reinforced stampable sheet as in claim 1 wherein multiple thermoplastic resin support layers and reinforcing fiber mats are laminated.
Claim 18
Dependent Claim
32 words
A fiber reinforced stampable sheet as claimed in claim 1 wherein said thermoplastic resin surface layer comprises a thermoplastic resin selected from a group consisting of polycarbonate resins and polycarbonate/polyester resin blends.
Claim 19
Dependent Claim
25 words
A fiber reinforced stampable sheet as claimed in claim 17 wherein said side surface layer has a surface roughness of at most about 32.5 microinches.
References Cited (Backward Citations)
US4044188A
Cited
US4145227A
Cited
US4098943A
Cited
US4269884A
Cited
US4379802A
Cited
US4379801A
Cited
US4471018A
Cited
US4716072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-09 | 1993-04-10 | 1993-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-09 | 1997-04-10 | 1997-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-09 | 2001-04-10 | 2001-10-10 | $7700.00 | Window Closed / Lapsed |