Process for separating fibres from composite materials

Details Process for separating fibres from composite materials Process for separating fibres from composite materials

1992-09-18

1993-10-12

Watts, Douglas D.

Solid material comminution or disintegration

Processes

With classifying or separating of material

241DIG38, B29B 1700, B29B 1702, B03B 906

Patent

active

052518272

ABSTRACT:
A resin reinforced fibre product such as glass fibre impregnated with a thermosetting resin is treated to recover fibre by initially shredding the waste, pulverizing the shredded waste and sieving the pulverized waste to separate the free fibres. The remaining waste is milled to produce a fine powder suitable as a filler. The pulverizing is completed without classification and a portion of the pulverized product above a nominal cut size recampaigned. Free fibres are separated by an airlift during the sieving process.

REFERENCES:
patent: 3941684 (1976-03-01), Bradbury et al.
patent: 4431530 (1989-02-01), Syben
patent: 4726530 (1988-02-01), Miller et al.
patent: 4784333 (1988-11-01), Hikake et al.
"Resource Recovery: Technology," J. Campbell et al., Conservation & Recycling, vol. 6, No. 4, 1983, pp. 147-159.
"Recycling of Waste PVC Leather and PVC Urethane in the Automobile Industry," S. Miyama, Conservation & Recycling, vol. 10, No. 4, 1987, pp. 265-271.

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