FOAMED RESIN COMPOSITION, WIRE AND CABLE
A foamed resin composition includes syndiotactic polystyrene, and a polyolefin resin of not less than 5.3 parts by weight and not more than 54 parts by weight relative to 100 parts by weight of the syndiotactic polystyrene. Alternatively, a foamed resin composition includes syndiotactic polystyrene, and fluorine-resin-containing powder of not less than 0.5 parts by weight and not more than 10 parts by weight relative to 100 parts by weight of the syndiotactic polystyrene.
1 . A foamed resin composition, comprising:
syndiotactic polystyrene; and
a polyolefin resin of not less than 5.3 parts by weight and not more than 54 parts by weight relative to 100 parts by weight of the syndiotactic polystyrene.
2 . The foamed resin composition according to claim 1 , further comprising:
an inorganic compound with a layered crystal structure.
3 . The foamed resin composition according to claim 2 , wherein the inorganic compound comprises clay, boron nitride, molybdenum disulfide, tungsten disulfide, melamine cyanurate, mica, talc, glass flake and hydrotalcite.
4 . A foamed resin composition, comprising:
syndiotactic polystyrene; and
fluorine-resin-containing powder of not less than 0 . 5 parts by weight and not more than 10 parts by weight relative to 100 parts by weight of the syndiotactic polystyrene.
5 . The foamed resin composition according to claim 4 , further comprising:
an inorganic compound with a layered crystal structure.
6 . The foamed resin composition according to claim 5 , wherein the inorganic compound comprises clay, boron nitride, molybdenum disulfide, tungsten disulfide, melamine cyanurate, mica, talc, glass flake and hydrotalcite.
7 . A wire, comprising:
a conductor; and
a foamed insulation layer on the conductor or on another layer on the conductor,
wherein the foamed insulation layer mainly comprises the foamed resin composition according to claim 1 .
8 . A wire, comprising:
a conductor; and
a foamed insulation layer on the conductor or on another layer on the conductor,
wherein the foamed insulation layer mainly comprises the foamed resin composition according to claim 3 .
9 . A cable, comprising:
a conductor;
a foamed insulation layer on the conductor or on another layer on the conductor;
a shield on the foamed insulation layer or on another layer on the foamed insulation layer; and
a sheath on the shield or on another layer on the shield,
wherein the foamed insulation layer mainly comprises the foamed resin composition according to claim 1 .
10 . The cable according to claim 9 , wherein the conductor comprises two parallel conductor wires.
11 . A cable, comprising:
a conductor;
a foamed insulation layer on the conductor or on another layer on the conductor;
a shield on the foamed insulation layer or on another layer on the foamed insulation layer; and
a sheath on the shield or on another layer on the shield,
wherein the foamed insulation layer mainly comprises the foamed resin composition according to claim 3 .
12 . The cable according to claim 11 , wherein the conductor comprises two parallel conductor wires.