Sumitomo Electric Industries, Limited

Terumichi Ichiba

Munetaka Kawaguchi

Hiroshi Shimba

Yutaka Yamamoto

Hiroaki Mukunashi

An optical transmission fiber having improved mechanical strength and suitable for use in optical communication comprising an optical fiber having formed thereover at least one layer of a composition mainly comprising a thermoplastic resin having a functional group, and a method for making the optical transmission fiber.

Optical transmission fiber

A terpolymer, consisting essentially of (a) a first component of ethylene, (b) a second component selected from an (1) unsaturated glycidyl ester of the following formula (I) and (2) an unsaturated glycidyl ether of the following formula (II), and (c) a third component selected from an alkyl acrylate, an alkyl methacrylate and vinyl acetate, is coated on one or both surfaces of a metal foil to make a laminate tape. ##EQU1## wherein R represents a hydrocarbon residue containing an ethylenically unsaturated bond. The laminate tape is used for preparing a laminate sheathed cable. The terpolymer resin may contain an antioxidant.

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Yokohama, Japan

Terumichi Ichiba