Multi-layer pipe
AssigneeMitsui Petrochemical Industries, Ltd.
InventorsShin Tokui, Masaki Kohyama
Life of this patent
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Abstract
A multi-layer pipe has an innermost layer formed of a butene polymer composition. At least one other layer is formed of a polyolefin resin composition comprising (A) 95-5 parts by weight of a polyolefin resin, (B) 5-95 parts by weight of a filler, and (C) 0.1-10 parts by weight per 100 parts by weight of components (A) and (B) combined of a modified polyolefin resin. This multi-layer pipe undergoes minimal elongation by heat so that it is free from troubles by thermal deformation even when high temperature fluid is passed therethrough, has high rigidity, and is thus suitable as plumbing for cold and hot water.
Claims7
A multi-layer pipe comprising at least two layers wherein
- the innermost layer is formed of a butene polymer composition and
- at least one layer other than said innermost layer is formed of a polyolefin resin composition comprising (A) 95 to 5 parts by weight of a polyolefin resin, (B) 5 to 95 parts by weight of a filler, and (C) 0.1 to 10 parts by weight per 100 parts by weight of components (A) and (B) combined of a modified polyolefin resin.
Dependencies are inferred from the claim text.