Plastic material, and process for the preparation thereof
AssigneeBASF SE
InventorsAlois Schlarb, J urgen Hofmann, Hilmar Ohlig, Peter Ittemann, Karl-Peter Farwerck
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Abstract
In a fiber composite plastic composed of plastic composition and fibers, the fibers have a pronounced fiber length distribution, in particular more than 50% by weight of the fibers have a length outside the range from 0.8.times.L to 1.2.times.L, where L is the mean (weight average) fiber length, and the mean fiber length is greater than the critical fiber length of the plastic composition/fiber system.
Claims32
A fiber composite plastic comprising a plastic composition and fibers, wherein the fibers have a pronounced fiber length distribution, such that more than 50% by weight of the fibers have a length outside the range from 0.8.times.L to 1.2.times.L, where L is the mean (weight average) fiber length, and the mean fiber length is greater than the critical fiber length of the plastic composition/fiber system.
A process for the preparation of a fiber composite plastic comprising plastic composition and fibers which comprises subjecting a first plastic material comprising at least one first composition of fibers having an essentially uniform fiber length and a plastic composition to mechanical loading such that a second plastic material is formed which comprises the plastic composition and a second composition of fibers, where this second composition of fibers has a pronounced fiber length distribution, wherein more than 50% by weight of the fibers have a fiber length outside the range of from 0.8.times.L to 1.2.times.L, where L is the mean (weight average) fiber length, and the mean fiber length is greater than the critical fiber length of the plastic composition/fiber system.
Dependencies are inferred from the claim text.