Plastics pipe
AssigneeUponor Innovation AB Industrivagen
InventorJyri Jarvenkyla
Life of this patent
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Abstract
A plastics pipe having a stabilized inner layer, wherein the inner layer comprises an extruded thermoplastic polymer comprising at least one polar stabilizer, wherein: (i) the thermoplastic polymer is provided with pendant polar functional groups, and/or (ii) the thermoplastic polymer comprises an effective amount of at least one filler provided with pendant polar functional groups, and/or (iii) the thermoplastic polymer comprises a blend of a non-polar thermoplastic polymer and a thermoplastic polymer provided with pendant polar functional groups.
Claims71
A plastics pipe having (a) an outer layer and (b) a stabilised inner layer and (c) a metallic barrier layer disposed between the inner and outer layer,
- wherein the metallic barrier layer is selected from the group consisting of a sputtered metal layer, a galvanically-coated metal layer, an electro-deposited metal layer, a wound metal sheet and a corrugated metal sheet, and
- wherein the stabilised inner layer comprises:
- an extruded thermoplastic polymer, wherein the thermoplastic polymer is (i) a polar functional polyolefin polymer, or (ii) a polyolefin polymer, or (iii) a combination of a polar functional polyolefin polymer and a polyolefin polymer, and wherein the thermoplastic polymer is selected from the group consisting of:
- polyethylene, cross-linked polyethylene and polypropylene;
- at least one polar stabilizer;
- and
- at least one particulate filler provided with pendant polar functional groups, comprising platelets and having an aspect ratio of from 10 to 150.
A method of producing a plastics pipe having (a) an outer layer and (b) a stabilised inner layer and (c) a metallic barrier layer disposed between the inner and out layer, which comprises extruding a polymeric composition to form at least the stabilised inner layer of the plastics pipe,
- wherein the metallic barrier layer is selected from the group consisting of a sputtered metal layer, a galvanically-coated metal layer, an electro-deposited metal layer, a wound metal sheet and a corrugated metal sheet, and
- wherein the polymeric composition which forms at least the stabilised inner layer comprises:
- a thermoplastic polymer, wherein the thermoplastic polymer is (i) a polar functional polyolefin polymer, or (ii) a polyolefin polymer, or (iii) a combination of a polar functional polyolefin polymer and a polyolefin polymer, and wherein the thermoplastic polymer is selected from the group consisting of:
- polyethylene, cross-linked polyethylene and polypropylene;
- at least one polar stabiliser;
- and
- at least one particulate filler provided with pendant polar functional groups, comprising platelets and having an aspect ratio of from 10 to 150.
Dependencies are inferred from the claim text.