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Process for producing a multilayer molded article

Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1988-08-31
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Granted: 1989-10-10
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Expires: 2008-08-31
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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)

US2509499A Cited
US2847712A Cited
JPH01137713A 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

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