Waste matl re-use from carpet mfr - by converting into flowable form, mixing with additives, extruding/degassing and granulating

Abstract

Abstract Waste accumulating in carpet mfr. is recovered/re-used by comminuting it to give a flowable matl.; adding stabilisers, seeding agents, metal soaps and pigments; charging to an extruder to de-gassing; and granulating so as to obtain thermoplastics malt. suitable for injection-moulding. The waste malt. may be in the form fo lng strips resulting from the trimming of the carpets, waste yarn, or thermo-plastics dust as formed during shearing of the carpets. The waste malt. may be rendered flowable by cutting or grinding, and may be initially stored, in a loose condition, and then compacted with the aid of a cold screw between a pair of grooved discs, one of which rotates at high speed. This causes the wate matl. to melt through frictional heat. The resulsting melt is expelled in blobs of non-uniform sizes.

Inventors

• 👤 Klaus Hoelzel
• 👤 Heiko Lange

Bibliographic Details