| 摘要 |
PROBLEM TO BE SOLVED: To reuse coating materials of a wire and a cable for an insulator and a sheath of an electric wire or cable without classifying them by each layer. SOLUTION: An insulator, a sheath, stuffing and a covering pressure tape are constituted of the same kind of resin. For the insulator and the sheath, a copolymer satisfying the following requirement (A) is used as their base; for the covering pressure tape, a tape containing a copolymer as its base satisfying the following requirement (B) or (C) is used; the stuffing is formed by drawing this tape uniaxially. (A) A copolymer that is formed by copolymerizing ethylene andα-olefin having a carbon number of 2 to 10 using a single site catalyst under the following conditions; (1) Mw/Mn <=2 (2) a concentration of 0.91 g/cm<3> or less (3) MI<=3 g/10 min (B) The same copolymer as (A) excluding the following conditions: (1) a concentration of 0.93 to 0.94 g/cm<3> (2) MI<=10 g/10 min (C) A copolymer that is formed by copolymerizing ethylene andα-olefin having a carbon number of 2 to 10 under the following conditions: (1) 2 <=Mw/Mn <=10 (2) a concentration of 0.93 to 0.94 g/cm<3> (3) MI<=10 g/10 min. |
