| abstract |
The subject of the present invention is to provide: suitable for the use of shoe soles and other footwear parts, it is possible to produce a cross-linked foam composition with excellent balance of light weight, heat shrinkability, compression set, and mechanical strength. ; Foam using the composition, and footwear parts using it. The ethylene-based copolymer composition of the present invention is characterized by containing: ethylene-based copolymer (A) that fully satisfies the following requirements (Aa), (Ab), (Ac), and (Ad); ethylene/carbon number 3 ~20 α-olefin/non-conjugated polyene copolymer rubber (B); and optionally ethylene/polar monomer copolymer (C); of which (Aa) the vinyl content per 1000 carbons 0.025~0.3, (Ab)MFR 10 /MFR 2.16 is 7-20 , (Ac) density is 0.850~0.910g/cm 3 , (Ad) melt flow rate is 0.01~200g/10 minutes. |