Patent ID: 6830805
Filing Date: 2004-12-14
Classification: B29B,B29C,B29K,Y02W,Y10S,Y10T

Abstract:
A product of manufacture obtained by utilizing heterogeneous waste material plastics consisting of plastics from recycling processes, plastics from sorted-out waste collection systems, plastics from solid urban wastes, plastics from industrial processing scraps, and mixtures thereof, said plastics having different melting temperatures and being prevailingly constituted by polyolefins and a heterogenous mix of non-compatible plastic materials by utilizing molding means, said products being each constituted by a layered structure provided with a not-visible thicker inner portion and a visible thin outer portion surrounding and coating said inner portion of product, wherein said waste materials are in succession shredded into small-sized particles and mixed together in mixing apparatus, thereby forming a first compound constituting a first component of each product adapted to provide for said not-visible inner portion of each product, and a second compound separated from the first compound constituting a second component of each product adapted to surround and coat said inner portion of product and provide for said visible outer portion of product, wherein said first and second compounds are subsequently heated separately from each other, under previous addition of heat stabilizing means and blowing means in the first compound adapted to swell the first compound during its heating and coloring means in the second compound, to a pre-determined heating temperature, thereby bringing about respectively a first and a second plasticized mass, whose materials include plastic materials having melting temperatures higher than said heating temperature incorporated in said mass, thereby behaving like inert filling materials, and wherein said first and second plasticized mass are injected at the same time into said moulding means shaped as the respective products, by mixing homogenously with each other so as to form a compound with lower density and higher flowability and a compound with higher density and lower flowability, determined by said inert filling materials, wherein said compound having lower density and higher flowability forms said outer portion of product surrounding said compound having higher density and lower flowability which forms said inner portion of product and the inner and outer portions are blended and amalgamated.