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US4546128A Expired / Lapsed US ⏱️ 0.0 years remaining

Composite material compositions using waste synthetic fiber

Assignee: MIKUNI SEISAKUSHO 2-66 INAHIRA MUSASHIMURAYAMA-SHI TOKYO JAPAN A CORP OF JAPAN KK
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Filing: 1984-05-09
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Granted: 1985-10-08
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Expires: 2004-05-09
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Abstract

Abstract The present invention provides composite material compositions using waste synthetic fiber released from fiber-related factories or general households. In an embodiment of the present invention, a thermoplastic synthetic resin may be incorporated with plasticizer(s), lubricant(s), and other additive(s), the mixture being molten and then kneaded with waste synthetic fiber which had been fibrillated into filaments, whereby said waste synthetic fiber is impregnated with the molten resin liquid to form a composite material composition. The present invention can thus provide inexpensive composite material compositions having excellent mechanical properties by making use of waste synthetic fiber which has been junked as waste so far, and lessening the rate of use of synthetic resins.

Inventors

  • 👤 Yoshikazu Nakajima

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 12:59
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/046; C08J11/00; C08J11/04; C08J11/06; C08L; C08L23/00; C08L23/02; C08L23/10; C08J2323/00; C08J2323/02; C08J2323/10; C08L2205/00; C08L2205/14; C08L2205/16; C08L67/00; C08L77/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10S; Y10S525/00; Y10S525/935; Y10T; Y10T428/00; Y10T428/25; Y10T428/254

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 43 words
A composite material suitable for injection molding comprising 100 parts by weight of waste polyester fiber in the form of separate filaments 0.5 to 10 mm. in length, intimately mixed and impregnated with 70 to 160 parts by weight of thermoplastic polypropylene resin.
Claim 2
Dependent Claim 43 words
A composite material suitable for injection molding comprising 100 parts by weight of waste polyester fiber in the form of separate filaments 0.5 to 10 mm. in length, intimately mixed and impregnated with 70 to 160 parts by weight of thermoplastic polypropylene resin.

References Cited (Backward Citations)

GB115050A Cited
US2015711A Cited
US2378477A Cited
US2527628A Cited
US3558591A Cited
DE2357886A1 Cited
US4382108A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-10-07 1989-04-08 1989-10-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-10-07 1993-04-08 1993-10-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-10-07 1997-04-08 1997-10-08 $7700.00 Window Closed / Lapsed

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