Method of producing homogeneous material with an extruder, an extruder, and a multilayer plastic pipe
AssigneeUponor Innovation AB
InventorsEsko Hippeläinen, Kari Kirjavainen, Jyri Järvenkylä
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Abstract
An extruded multilayer plastic pipe is provided. The pipe comprises an inner layer, an outer layer and an intermediate layer. Each of the inner and outer layers is comprised of a thermoplastic material. The intermediate layer consists essentially of a lower density material than said inner and outer layers, and the intermediate layer is situated between and abuts both the inner layer and the outer layer. At least one of the inner, outer and intermediate layers consists of reinforced solid or foamed reprocessed plastic.
Claims26
An extruded multilayer plastic pipe comprising an inner layer, an outer layer and an intermediate layer, wherein each of said inner and outer layers is comprised of a thermoplastic material, the intermediate layer consisting essentially of a lower density material than said inner and outer layers, and said intermediate layer being situated between and abutting both the inner layer and the outer layer, and a least one of said inner, outer and intermediate layers consisting of reinforced solid or foamed reprocessed plastic, at least one of said inner, outer and intermediate layers comprising a plastic matrix and a reinforcement, said plastic matrix and reinforcement being extrudable together and forming at least one of the inner, outer and intermediate layers as a reinforced solid or foamed reprocessed plastic with the reinforcement extruded with and contained within the plastic matrix.
An extruded multilayer plastic pipe comprising an inner layer, an outer layer and an intermediate layer, the intermediate layer consisting essentially of a lower density of material than said inner and outer layers and said intermediate layer being situated between and abutting both the inner layer and the outer layer and at least one of said inner, outer and intermediate layers consisting of reinforced solid or foamed reprocessed plastic, the reprocessed plastic containing rubber obtained from the reclaiming of car tires, at least one of said inner, outer and intermediate layers comprising a plastic matrix and a reinforcement, said plastic matrix and reinforcement being extrudable together and forming at least one of the inner, outer and intermediate layers as a reinforced solid or foamed reprocessed plastic with the reinforcement extruded with and contained within the plastic matrix.
An extruded multilayer plastic pipe comprising an inner layer, an outer layer and an intermediate layer, wherein each of said inner and outer layers is comprised of a thermoplastic material, the intermediate layer being formed of softer material and said intermediate layer being situated between and abutting both the inner layer and the outer layer, and at least one of said inner, outer and intermediate layers consisting of reinforced solid or foamed reprocessed plastic, at least one of said inner, outer and intermediate layers comprising a plastic matrix and a reinforcement, said plastic matrix and reinforcement being extrudable together and forming at least one of the inner, outer and intermediate layers as a reinforced solid or foamed reprocessed plastic with the reinforcement extruded with and contained within the plastic matrix.
Dependencies are inferred from the claim text.