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1. (WO2010116401) METHOD FOR MANUFACTURE OF EXPANDED ELECTRIC WIRE

Pub. No.:    WO/2010/116401    International Application No.:    PCT/JP2009/001463
Publication Date: Fri Oct 15 01:59:59 CEST 2010 International Filing Date: Tue Mar 31 01:59:59 CEST 2009
IPC: H01B 13/14
Applicants: FUJIKURA LTD.
株式会社フジクラ
WATANABE, RYO
渡部亮
Inventors: WATANABE, RYO
渡部亮
Title: METHOD FOR MANUFACTURE OF EXPANDED ELECTRIC WIRE
Abstract:
Disclosed is a method for manufacturing an expanded electric wire, which can form a fine foam in an expanded insulating layer and can improve satisfactorily the production efficiency of the expanded electric wire. Specifically disclosed is a method for manufacturing an expanded electric wire, wherein the expanded electric wire can be produced through an expanded insulation layer formation step of forming an expanded insulating layer on a conductive material. In the method, the expanded insulating layer formation step comprises the substeps of: introducing a base rein into an extruder; introducing a foaming agent into the extruder; and extruding a mixture composed of the base resin and the foaming agent through the extruder to form an expanded insulating layer on a conductive material, wherein the resin contained in the mixture has a shear stress of 0.40 to 0.80 MPa and the base resin is a propylene resin.