Process for production of recycled plastic products
AssigneeMontell North America Inc.
InventorJoachim Preiss
Life of this patent
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Abstract
Disclosed is a process for the production of a recycled plastic product from varnished plastic parts by multistagedly grinding but not pulverizing while at the same time subjecting same to a stretching treatment during the pulverizing step to loosen substantially completely all of the varnish sticking thereto. The resulting plastic and varnish particles are separated and thereafter packaged, typically, in the form of granulate. The resulting thermoplastic plastic recycled material does not contain any visible inclusions of more than 0.25 mm.sup.2 of varnished particles in the sheet test.
Claims17
A method for recycling and reclamation of plastic materials from varnished plastic parts comprising the following steps:
- (a) coarse disintegration of the varnished plastic parts in a first shredder to produce coarse particles,
- (b) fine milling of said coarse particles and simultaneously inducing stretch and shear forces in the particles, the stretch and shear forces causing bending and stretching of the particles so that adherent varnish flakes are removed to produce plastic particles and varnish particles, and
- (c) separation of said plastic and varnish particles.
Dependencies are inferred from the claim text.