| abstract |
A crosslinked polyolefin resin foam, wherein a C4-12 α-olefin-copolymerized, linear, low-density polyethylene resin (Y) and a low-density polyethylene resin (X) other than the resin (Y), the content of the resin (X) is lower than that of the resin (Y); the sum of (X) and (Y) is 50% or more and 100% or less based on 100% of all components; 50% compressive hardness is 70 kPa or less; when the foam is divided in the thickness direction into equal four layers (A), (B), (C) and (D) in this order from one face side of the foam, and 50% compressive hardnesses of layers (A) and (D) are “compressive hardness (a)” and “compressive hardness (d),” respectively, the ratio of (a) to (d) is 1/20 to 1/2; and air permeability in the thickness direction is less than 0.9 L/min. |