| 摘要 |
The additive (b) for a communication cable filler according to the present invention contains as a main component an ethylene/ alpha -olefin copolymer (a) having a number-average molecular weight (Mn), measured by GPC, of 500 to 5,000 and having a crystallizing temperature (Tc ( DEG C), rate of temperature decrease: 2 DEG C/min) measured by DSC and a density (D (kg/m<3>)) measured by a density gradient tube method, said Tc and D satisfy the following formula (1): <DF NUM="(1).">0.501xD (kg/m<3>) - 366 >/= Tc ( DEG C) </DF> The communication cable filler (c) according to the invention is prepared by blending (X) 40 to 90 % by mass of polybutene (d) having a number-average molecular weight of 200 to 2,400, (Y) 1 to 50 % by mass of an oil (e) and (Z) 1 to 15 % by mass of the ethylene/ alpha -olefin copolymer (a). The additive for a communication cable filler and the communication cable filler are excellent in the filling workability and the oil retention properties of a cable jelly. |
