To provide an electric cable that can satisfy flame retardancy and battery fluid resistance in the CHFUS region provided in ISO 6722 and also satisfy wear resistance and low-temperature impact property by using a halogen-containing flame retardant. An electric cable in which a coat layer is formed of a resin composition that includes (A) 55 to 85 parts by mass of a polypropylene homopolymer, (B) 5 to 20 parts by mass of a polypropylene-based modified resin, (C) 5 to 20 parts by mass of a polyolefin-based copolymer, and (D) 5 to 15 parts by mass of a modified olefin-based elastomer, respectively and further includes 1 to 45 parts by mass of a metal hydroxide and 10 to 80 parts by mass of a halogen-containing flame retardant based on 100 parts by mass of the resins (A), (B), (C), and (D) in total.
1. A electric cable comprising:
a coat layer comprising a resin composition, the resin composition comprising:
(A) 55 to 85 parts by mass of a polypropylene homopolymer,
(B) 5 to 20 parts by mass of a polypropylene-based modified resin,
(C) 5 to 20 parts by mass of a polyolefin-based copolymer, and
(D) 5 to 15 parts by mass of a modified olefin-based elastomer,
wherein the coat layer further comprises 1 to 45 parts by mass of a metal hydroxide and 10 to 80 parts by mass of a halogen-containing flame retardant based on 100 parts by mass of the resins (A), (B), (C), and (D) in total,
wherein the polypropylene-based modified resin (B) is one prepared by graft-copolymerizing maleic anhydride to a polypropylene-based resin,
wherein the metal hydroxide is magnesium hydroxide,
wherein the halogen-containing flame retardant is a bromine-containing flame retardant, and
wherein the bromine-containing flame retardant is tetrabromobisphenol A-bis(2,3-dibromopropyl ether).
2. The electric cable according to claim 1 , wherein the maleic anhydride has an acid value (JIS K0070) of 15 to 55.
3. The electric cable according to claim 1 , wherein the polypropylene-based modified resin (B) has a weight average molecular weight of 15,000 to 50,000.
4. The electric cable according to claim 1 , wherein the polyolefin-based copolymer (C) is a block copolymer or a random copolymer composed of propylene as a primary component with other alpha-olefins.
5. The electric cable according to claim 1 , wherein the magnesium hydroxide is magnesium hydroxide surface-treated with a fatty acid or a silane coupling agent.
6. The electric cable according to claim 1 , wherein the parts by mass of the metal hydroxide is 1 to 29 based on 100 parts by mass of the resins (A), (B), (C), and (D) in total.
7. The electric cable according to claim 1 , wherein the parts by mass of the halogen-containing flame retardant is 51 to 80 based on 100 parts by mass of the resins (A), (B), (C), and (D) in total.