Polypropylene/fiber composites

Details Polypropylene/fiber composites Polypropylene/fiber composites

1995-11-03

1997-05-06

Raimund, Christopher

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 99, 524582, 524583, 524584, 524579, C08K 534

Patent

active

056272260

ABSTRACT:
A composite is provided having improved toughness without reduction in stiffness comprising a polymer matrix having fibers embedded therein wherein the polymer of the matrix is substantially beta polypropylene or a beta polypropylene-olefin copolymer. The composite is made by combining a nucleating agent with a polymer composition selected from the group consisting of alpha polypropylene, an alpha polypropylene-olefin copolymer, alpha polypropylene containing fibers therein and an alpha polypropylene-olefin copolymer having fibers therein, and when the polymer is polypropylene or polypropylene-olefin copolymer, also independently adding fiber to the polymer or copolymer and thereafter inducing nucleation whereby a composite of improved stiffness with no reduction in toughness is formed.

REFERENCES:
patent: 3853808 (1974-12-01), Sishikawa et al.
patent: 5231126 (1993-07-01), Shi et al.

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