Patent US6071454A successfully refreshed from Google Patents.
US6071454A
Expired / Lapsed
US
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Method for producing a composite molded article of thermoplastic resins
Assignee: Shimizu Industry Co Ltd
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Filing: 1998-01-21
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Granted: 2000-06-06
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Expires: 2018-01-21
Abstract
Abstract A method for producing a composite molded article, includes providing a molded product of a thermoplastic elastomer; and then molding a thermoplastic rigid resin on the molded thermoplastic elastomer, to provide a composite molded article.
Inventors
- 👤 Tadashi Shimizu
- 👤 Takehiko Enomoto
- 👤 Masahiro Ito
- 👤 Kenji Ogura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:55
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/16; B29C45/1676; B29C45/14; B29C45/14778; B29C2045/1678; B29K; B29K2221/00; B29K2221/003
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
79 words
A method for producing a composite molded article, the method comprising: providing a molded thermoplastic elastomer having a melt flow rate range, at 230° C. and 21.18N of between 0.1 g/10 minutes and 10 g/10 minutes; and molding a thermoplastic rigid resin having a melt flow rate range, at 230° C. and 21.18N of between 5 g/10 minutes and 85 g/10 minutes, to form a molded thermoplastic rigid resin on said molded thermoplastic elastomer as the composite molded article.
Claim 2
Independent Claim
79 words
A method for producing a composite molded article, the method comprising: providing a molded thermoplastic elastomer having a melt flow rate range, at 230° C. and 21.18N of between 0.1 g/10 minutes and 10 g/10 minutes; and molding a thermoplastic rigid resin having a melt flow rate range, at 230° C. and 21.18N of between 5 g/10 minutes and 85 g/10 minutes, to form a molded thermoplastic rigid resin on said molded thermoplastic elastomer as the composite molded article.
Claim 3
Dependent Claim
53 words
The method according to claim 1, further comprising: positioning said molded thermoplastic elastomer at a position in a mold; melting said thermoplastic rigid resin; introducing said thermoplastic rigid resin, while molten, onto said molded thermoplastic elastomer in said mold; and cooling and solidifying said thermoplastic rigid resin to provide the composite molded article.
Claim 4
Dependent Claim
91 words
The method according to claim 1, wherein: providing said molded thermoplastic elastomer comprises: melting a thermoplastic elastomer; introducing said thermoplastic elastomer, while molten, into a first mold; and cooling and solidifying said thermoplastic elastomer to provide said molded thermoplastic elastomer; and molding a thermoplastic rigid resin comprises: positioning said molded thermoplastic elastomer in a second mold; melting said thermoplastic rigid resin; introducing said thermoplastic rigid resin, while molten, onto said molded thermoplastic elastomer in said second mold; and cooling and solidifying said thermoplastic rigid resin to provide the composite molded article.
Claim 5
Dependent Claim
20 words
The method according to claim 3, wherein each of said first and second molds comprises a core and a cavity.
Claim 6
Dependent Claim
31 words
The method according to claim 4, wherein one of said core and said cavity of said first mold is commonly used as said core and said cavity of said second mold.
Claim 7
Dependent Claim
31 words
The method according to claim 4, wherein both of said core and said cavity of said first mold are commonly used as said core and said cavity of said second mold.
Claim 8
Dependent Claim
27 words
The method according to claim 3, including melting of said thermoplastic elastomer and of said thermoplastic rigid resin at a temperature from 180° C. to 280° C.
Claim 9
Dependent Claim
13 words
The method according to claim 1, wherein said thermoplastic rigid resin comprises polypropylene.
Claim 10
Dependent Claim
20 words
The method according to claim 1, wherein said thermoplastic rigid resin comprises polypropylene, and said thermoplastic elastomer comprises a polyolefin.
Claim 11
Dependent Claim
27 words
The method according to claim 1, wherein the composite molded article is a member for an air control damper, duct, or housing of an automotive air conditioner.
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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) | 2003-06-06 | 2003-12-06 | 2004-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-06-06 | 2007-12-06 | 2008-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-06-06 | 2011-12-06 | 2012-06-06 | $7700.00 | Window Closed / Lapsed |