Patent US4596736A successfully refreshed from Google Patents.
US4596736A
Expired / Lapsed
US
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Fiber-reinforced resinous sheet
Assignee: Dow Chemical Co
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Filing: 1984-06-04
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Granted: 1986-06-24
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Expires: 2004-06-04
Abstract
Abstract Laminate structures are prepared having a substantially non-reinforced polymer core and outer layers comprising a resin containing randomly oriented reinforcing fibers from about 0.06 to about 2 inches in length. In addition, a process for preparing such laminates is disclosed.
Inventors
- 👤 Jacob Eichhorn
- 👤 Ritchey O. Newman, Jr.
- 👤 Frederick J. Lowes, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:42
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B5/00; B29; B29C; B29C37/00; B29C37/0078; B29C37/0082; B29C70/00; B29C70/02; B29C70/021; B29C70/025; B29C70/04; B29C70/06; B29C70/08; B29C70/086; B32B27/12; B32B27/18; B32B27/30; B32B27/302; B32B27/32; B32B37/00; B32B37/12; B32B38/00; B32B38/0036; B32B7/00; B32B7/04; B32B7/12; B29K; B29K2105/00; B29K2105/04; B29K2105/06; B29K2105/12; B29K2105/16; B32B2262/00; B32B2262/10; B32B2262/101; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/518; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/249921; Y10T428/249953; Y10T428/24996; Y10T428/249986; Y10T428/25; Y10T428/254; Y10T428/29; Y10T428/2913; Y10T428/298; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/647; Y10T442/651; Y10T442/674; Y10T442/676
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
82 words
A resin sheet comprising: (a) an intermediate layer comprising a substantially non-reinforced thermoplastic resin and (b) bound onto each major surface of said intermediate layer, an outer layer of an aqueous wet-laid fiber-reinforced resin sheet comprising a continuous polymeric matrix prepared from a finely particulate non-fibrillar polymer, and distributed throughout said matrix, reinforcing fibers having an average length from about 0.06 to about 2 inches, which fibers are randomly oriented in two dimensions substantially in the plane defined by said outer layer.
Claim 2
Dependent Claim
82 words
A resin sheet comprising: (a) an intermediate layer comprising a substantially non-reinforced thermoplastic resin and (b) bound onto each major surface of said intermediate layer, an outer layer of an aqueous wet-laid fiber-reinforced resin sheet comprising a continuous polymeric matrix prepared from a finely particulate non-fibrillar polymer, and distributed throughout said matrix, reinforcing fibers having an average length from about 0.06 to about 2 inches, which fibers are randomly oriented in two dimensions substantially in the plane defined by said outer layer.
Claim 3
Dependent Claim
32 words
The resin sheet of claim 1 wherein each of said outer layer is from about 0.1 to 1 mm thick and the intermediate layer is from about 1 to 10 mm thick.
Claim 4
Dependent Claim
17 words
The resin sheet of claim 1 wherein each outer layer is heat bonded to said intermediate layer.
Claim 5
Dependent Claim
22 words
The resin sheet of claim 1 wherein each outer layer is bound to said intermediate layer by means of an adhesive layer.
Claim 6
Dependent Claim
12 words
The resin sheet of claim 1 wherein the reinforcing fibers comprise glass.
Claim 7
Dependent Claim
18 words
The resin sheet of claim 5 wherein said continuous matrix of each said outer layer comprises a polyolefin.
Claim 8
Dependent Claim
20 words
The resin sheet of claim 5 wherein said continuous matrix of each said outer layer comprises a poly(vinyl aromatic) resin.
Claim 9
Dependent Claim
21 words
The resin sheet of claim 1 wherein said continuous matrix further comprises the solids of a binder and an organic flocculant.
Claim 10
Dependent Claim
17 words
The resin sheet of claim 8 wherein said binder is a polymeric latex containing bound ionic charges.
Claim 11
Dependent Claim
14 words
The resin sheet of claim 1 wherein said intermediate layer has a cellular structure.
Claim 12
Dependent Claim
21 words
The resin sheet of claim 10 wherein said intermediate layer comprises a polystyrene, polyurethane, polyisocyanurate, polyethylene foam, or crosslinked polyethylene foam.
Claim 13
Dependent Claim
22 words
The resin sheet of claim 1 wherein each said outer layer contains from about 10 to 60 percent by weight reinforcing fibers.
Claim 14
Dependent Claim
15 words
The resin sheet of claim 1 wherein at least the outer layers are radiation crosslinked.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-23 | 1989-12-23 | 1990-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-23 | 1993-12-23 | 1994-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-23 | 1997-12-23 | 1998-06-24 | $7700.00 | Window Closed / Lapsed |