Patent US4873041A successfully refreshed from Google Patents.
US4873041A
Expired / Lapsed
US
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Process for producing a multilayer molded article
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1988-08-31
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Granted: 1989-10-10
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Expires: 2008-08-31
Abstract
Abstract A multilayer molded article having improved appearance and feeling is produced by wetting a skin material including a fabric or a thermoplastic resin sheet as an outermost layer with at least one liquid material which is water, an aqueous solution, a volatile material which is liquid in an ordinary state, or a solution including the volatile material as a medium, supplying the wet skin material between male and female molds, supplying a thermoplastic resin melt between the molds and closing the molds to form the multilayer molded article including the integrally adhered skin material and the thermoplastic resin.
Inventors
- 👤 Syohei Masui
- 👤 Masahito Matsumoto
- 👤 Nobuhiro Usui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:56
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/68; B29C70/681; B29C70/683; B29B; B29B13/00; B29C43/00; B29C43/02; B29C43/18; B29C43/183; B29C43/184; B32; B32B; B32B37/00; B32B37/0038
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
A process for producing a multilayer molded article which comprises: wetting a skin material comprising a fabric or a thermoplastic resin sheet as an outermost layer with at least one liquid material, which is a volatile material and which is a liquid at room temperature and atmospheric pressure, state and a solution having a surfactant contained therein comprising a volatile material which is liquid in an ordinary state as a medium, supplying the wet skin material between male and female molds, supplying a thermoplastic resin melt between the molds and closing the molds to shape the thermoplastic resin melt against the wet skin material and thereby form the multilayer molded article comprising the integrally adhered skin material and the thermoplastic resin, wetting, of the skin material including wetting of the outermost layer to the extent that increase of the temperature of the skin material and excess penetration of the skin material are prevented during shaping of the thermoplastic melt, thereby preventing deterioration of the feeling and warping of the molded article.
Claim 2
Dependent Claim
171 words
A process for producing a multilayer molded article which comprises: wetting a skin material comprising a fabric or a thermoplastic resin sheet as an outermost layer with at least one liquid material, which is a volatile material and which is a liquid at room temperature and atmospheric pressure, state and a solution having a surfactant contained therein comprising a volatile material which is liquid in an ordinary state as a medium, supplying the wet skin material between male and female molds, supplying a thermoplastic resin melt between the molds and closing the molds to shape the thermoplastic resin melt against the wet skin material and thereby form the multilayer molded article comprising the integrally adhered skin material and the thermoplastic resin, wetting, of the skin material including wetting of the outermost layer to the extent that increase of the temperature of the skin material and excess penetration of the skin material are prevented during shaping of the thermoplastic melt, thereby preventing deterioration of the feeling and warping of the molded article.
Claim 3
Dependent Claim
29 words
The process according to claim 1, wherein the outermost layer of the skin material comprises a fabric and is wetted with an aqueous solution having a surfactant contained therein.
Claim 4
Dependent Claim
13 words
The process according to claim 2, wherein the surfactant is a cationic surfactant.
Claim 5
Dependent Claim
13 words
The process according to claim 2, wherein the surfactant is a tertiary amine.
Claim 6
Dependent Claim
12 words
The process according to claim 1, wherein the liquid material is water.
Claim 7
Dependent Claim
14 words
The process according to claim 1, wherein the liquid material further comprises a surfactant.
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) | 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 |