Method for producing carbon fiber-reinforced gypsum models and f

Details Method for producing carbon fiber-reinforced gypsum models and f Method for producing carbon fiber-reinforced gypsum models and f

1989-07-25

1991-02-05

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 69, 264 86, 264115, 264136, 264137, 264157, 264226, 264256, 264310, 264333, 264337, B06B 100, B28B 108

Patent

active

049902920

ABSTRACT:
A process for producing improved gypsum models and molds of high duplication accuracy is provided. In the process, bundles of carbon fibers of specified length and amount having a sizing agent deposited thereon are treated to remove the sizing agent from the carbon fibers which are then separated into single fibers in water. A major part of hemihydrate gypsum (CaSO.sub.4.1/2H.sub.2 O) powder is then added to the carbon fibers dispersed in water to obtain a gypsum slurry having the carbon fibers uniformly dispersed therein. The slurry is then cast to obtain the models or molds.

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