MANUFACTURING METHOD OF MULTILAYER RESIN PIPE, AND MANUFACTURING METHOD OF INNER SURFACE RESIN LINING STEEL PIPE

Title:

MANUFACTURING METHOD OF MULTILAYER RESIN PIPE, AND MANUFACTURING METHOD OF INNER SURFACE RESIN LINING STEEL PIPE

Document Type and Number:

Japanese Patent JP2002257264

Kind Code:

A

Abstract:

To provide a manufacturing method of a multi-layer resin pipe of which shape is restored by heating.

A multilayer resin having two or more layers formed of two or more kinds of resins is deformed and kept in shape temporarily, in a state in which residual stress is applied to at least two layers, thereby providing the property of restoring the shape for at least one layer and providing a property of keeping the shape at a room temperature for at least one layer. Thereafter, the shape is restored by heating.

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Inventors:

SUGAWARA KEIJI
KOBAYASHI MASATOSHI
FURUTA AKIHIKO

Application Number:

JP2001055704A

Publication Date:

September 11, 2002

Filing Date:

February 28, 2001

Export Citation:

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Assignee:

NIPPON KOKAN KK

International Classes:

F16L9/12; B29C61/08; B29C63/42; (IPC1-7): F16L9/12; B29C61/08; B29C63/42

Attorney, Agent or Firm:

Yasuo Ishikawa

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