Process for separating fibres from composite materials.

摘要

A resin reinforced fibre product such as glass fibre impregnated with a thermosetting resin is treated to recover fibre by initially shredding the waste (12), pulverizing (24) the shredded waste and sieving (26,34,42) the pulverized waste to separate the free fibres. The remaining waste is milled (50) 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 (30). Free fibres are separated by an airlift (20) during the sieving process. Further separation of shorter fibres is obtained from the throughs by processing by a sifter to separate dust and subsequent screening at a larger mesh size to separate particulate material.