US 11,346,999 B2 · Optical fiber cable, harness, and method of manufacturing optical fiber cable

Abstract

An optical fiber cable comprising an optical fiber, and a jacketing layer including at least two or more layers of a jacketing inner layer and a jacketing outer layer formed in this order concentrically, wherein the jacketing layer comprises at least two or more layers of a jacketing inner layer and a jacketing outer layer formed in this order concentrically; a material constituting the jacketing inner layer is composed of a resin material having an oxygen permeability of 2.0 cc·20 μm/(m2·day·atm) or less; a material constituting the jacketing outer layer comprises at least one selected from a polyolefin-based resin, a polybutylene terephthalate-based resin, and a fluorine-based resin containing no chlorine atom in its structure; and the following general formula (i) and (ii) are satisfied when an outer diameter of the optical fiber is denoted by A (μm), an outer diameter of the optical fiber cable is denoted by B (μm), and a thickness of the jacketing outer layer is denoted by c (μm): 900≤A≤1100 (i) 0.40≤2×c/(B−A)≤0.70 (ii).

Claims21

Dependent claims

An optical fiber cable comprising an optical fiber and a jacketing layer formed on the outer periphery of the optical fiber,

wherein the jacketing layer comprises at least two or more layers of a jacketing inner layer and a jacketing outer layer formed in this order concentrically;
a material constituting the jacketing inner layer is composed of a resin material having an oxygen permeability of 2.0 cc·20 μm/(m2·day·atm) or less;
a material constituting the jacketing outer layer comprises at least one selected from a polyolefin-based resin, a polybutylene terephthalate-based resin, and a fluorine-based resin containing no chlorine atom in its structure;
the optical fiber cable further comprises a jacketing intermediate layer between the jacketing inner layer and the jacketing outer layer;
and
the following general formula (i) and (ii) are satisfied when an outer diameter of the optical fiber is denoted by A (μm), an outer diameter of the optical fiber cable is denoted by B (μm), and a thickness of the jacketing outer layer is denoted by c (μm):
900≤A≤1100 (i)
0.40≤2×c/(B−A)≤0.70 (ii).

5 more elements

A method of manufacturing an optical fiber cable comprising an optical fiber and a jacketing layer formed on the outer periphery of the optical fiber,

the jacketing layer being obtained by forming
a jacketing inner layer,
a jacketing intermediate layer and
a jacketing outer layer in this order concentrically,
wherein a material constituting the jacketing inner layer is an ethylene-vinyl alcohol-based resin;
a material constituting the jacketing intermediate layer comprises a polyamide-based resin (N);
the polyamide-based resin (N) is a polyamide resin composition containing either a polyamide 11 or a polyamide 12 in an amount of 80% by mass or more based on the total mass of the polyamide-based resin (N), or a polyamide 12;
a material constituting the jacketing outer layer comprises at least one selected from a polyolefin-based resin, a polybutylene terephthalate-based resin, and a fluorine-based resin containing no chlorine atom in its structure;
and,
the method comprises coating the jacketing inner layer and the jacketing intermediate layer simultaneously on the outer periphery of the optical fiber by supplying the material constituting the jacketing inner layer and the material constituting the jacketing intermediate layer into a co-extrusion coating apparatus with a compression type two-layer collective coating cross head.

7 more elements

Dependencies are inferred from the claim text.

Optical fiber cable, harness, and method of manufacturing optical fiber cable

Life of this patent

Optical fiber cable, harness, and method of manufacturing optical fiber cable

Life of this patent

Abstract

Claims21