Patent ID: 6841643

Claim:
An additive (b) for a communication cable filler, containing an ethylene/α-olefin copolymer (a) having a number-average molecular weight (Mn), measured by gel permeation chromatography (GPC), of 500 to 5,000 and having a crystallizing temperature (Tc (° C.), rate of temperature decrease: 2° C./min) measured by a differential scanning calorimeter (DSC) and a density (D (kg/m 3 )) measured by a density gradient tube method, said Tc and D satisfying the following formula (1): 0.501 ×D (kg/m 3 )−366 ≧Tc (° C.) (1), wherein the α-olefin is at least one selected from the group consisting of propene, 1-butene, 1-hexene and 4-methyl-1-pentene.