OLEFIN BLOCK COPOLYMER AND SHEET-SHAPED MOLDED BODY

The present invention relates to an olefin block copolymer which exhibits superior elasticity and heat resistance, and which therefore may be desirable for use in forming an anti-slip pad. The present invention also relates to a sheet-shaped molded body comprising the copolymer. The olefin block copolymer comprises a plurality of blocks or segments containing an ethylene-based or propylene-based repeating unit and an α-olefin-based repeating unit, wherein the two units have different weight fractions. A predetermined relationship is satisfied when a 5 to 10 kg weight is applied to the sheet-shaped molded body of the block copolymer for 12 hours or longer at a temperature of 60°C or higher, and the weight is then removed.