US4795603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing composite material of plastic and rubber
Assignee: Individual
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Filing: 1987-10-08
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Granted: 1989-01-03
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Expires: 2007-10-08
Abstract
Abstract Rubber waste fine particles in the form of fine particles obtained by crushing rubber waste and plastics waste rugged rough particles formed by crushing molded polyethylene or polypropylene waste are mixed to obtain a raw material mixture. When the mixture is heated, only the plastics waste rugged rough particles are melted, and the resulting material is pressed and injected to mold it into the desired shape. The thus obtained composite material exhibits an ebony-like configuration, and is light in weight, high in hardness, excellent in toughness, and rich in water resistance and weather resistance.
Inventors
- 👤 Nobuhiko Nagayasu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:29
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/06; B; B29; B29C; B29C45/00; B29B; B29B17/00; B29B17/0026; B29C45/0001; C08L; C08L21/00; B29K; B29K2021/00; B29K2023/00; B29K2105/00; B29K2105/26; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10S; Y10S264/00; Y10S264/911; Y10S264/912; Y10S264/916; Y10S264/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A method for producing a composite material of plastics and rubber, the method comprising the steps of mixing rubber waste fine particles and rugged rough particles of plastics waste which have a grain size within the range of 3 to 5 mm and which are obtained by crushing molded polyethylene or polypropylene waste, said fine particles and rugged rough particles being uniformly combined because of absence of surface slide therebetween, then heating said mixture to melt only said rough particles, pressing and injecting the mixture to mold it, said rubber waste fine particles being in the range of 30 to 10 weight %, and said plastics waste rugged rough particles being in the range of 70 to 90 weight %.
Claim 2
Independent Claim
120 words
A method for producing a composite material of plastics and rubber, the method comprising the steps of mixing rubber waste fine particles and rugged rough particles of plastics waste which have a grain size within the range of 3 to 5 mm and which are obtained by crushing molded polyethylene or polypropylene waste, said fine particles and rugged rough particles being uniformly combined because of absence of surface slide therebetween, then heating said mixture to melt only said rough particles, pressing and injecting the mixture to mold it, said rubber waste fine particles being in the range of 30 to 10 weight %, and said plastics waste rugged rough particles being in the range of 70 to 90 weight %.
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) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |