Insulated wire and cable using halogen-free flame-retardant resin composition
AssigneeHitachi Metals, Ltd.
InventorsAkira Setogawa, Makoto Iwasaki
Life of this patent
Estimating the term…
Abstract
An insulated wire includes a conductor, and an insulation layer covering an outer periphery of the conductor. The insulation layer includes a halogen-free flame-retardant resin composition including a base polymer, not less than 1 part by mass and not more than 10 parts by mass of an amorphous silica and not less than 10 parts by mass and not more than 150 parts by mass of a halogen-free flame retardant relative to 100 parts by mass of the base polymer. The base polymer includes not less than 50 parts by mass and not more than 90 parts by mass of either an ethylene-vinyl acetate copolymer or an ethylene-butene copolymer and not less than 10 parts by mass and not more than 50 parts by mass of a low-density polyethylene.
Claims10
An insulated wire, comprising:
- a conductor;
- and
- an insulation layer covering an outer periphery of the conductor,
- wherein the insulation layer comprises a halogen-free flame-retardant resin composition comprising a base polymer, not less than 1 part by mass and not more than 10 parts by mass of an amorphous silica with a specific surface area of not less than 100 m2/g and not more than 150 m2/g, as measured by BET method and not less than 10 parts by mass and not more than 80 parts by mass of a metal hydroxide as a flame retardant component relative to 100 parts by mass of the base polymer, and
- wherein the base polymer consists of not less than 50 parts by mass and not more than 90 parts by mass of an ethylene-butene copolymer and not less than 10 parts by mass and not more than 50 parts by mass of a low-density polyethylene,
- wherein the flame retardant component consists of the metal hydroxide, and
- a melting temperature of the low-density polyethylene is not less than 95° C. and not more than 101° C.
A cable, comprising:
- an insulated wire comprising a conductor and an insulation layer covering an outer periphery of the conductor;
- and
- a sheath formed around the insulated wire,
- wherein the sheath comprises a sheath halogen-free flame-retardant resin composition comprising a sheath base polymer, not less than 1 part by mass and not more than 10 parts by mass of an amorphous silica with a specific surface area of not less than 100 m2/g and not more than 150 m2/g, as measured by BET method and not less than 10 parts by mass and not more than 80 parts by mass of a metal hydroxide as a flame retardant component relative to 100 parts by mass of the sheath base polymer, and
- wherein the sheath base polymer consists of not less than 50 parts by mass and not more than 90 parts by mass of an ethylene-butene copolymer and not less than 10 parts by mass and not more than 50 parts by mass of a low-density polyethylene with a melting temperature of not less than 95° C. and not more than 101° C.,
- wherein the flame retardant component consists of the metal hydroxide.
Dependencies are inferred from the claim text.