Foam particle moulded article, sole cushion, and method for producing foam particles

Abstract

The present invention relates to an in-mold expanded beads molded article of expanded beads of an olefin thermoplastic elastomer, a cushion for shoe sole, and a method of producing expanded beads provided with through-holes and composed of a block copolymer of a polyethylene block and an ethylene/α-olefin copolymer block, and with respect to the in-mold expanded beads molded article of expanded beads of an olefin thermoplastic elastomer, a voidage of the expanded beads molded article is 5 to 40%; a density of the expanded beads molded article is 30 to 150 g/L; and a flexural modulus of the olefin thermoplastic elastomer that constitutes the expanded beads molded article is 10 to 100 MPa.

1 . An expanded beads molded article, which is an expanded beads molded article of expanded olefin thermoplastic elastomer beads, and has a voidage of 5 to 40% and a density of 30 to 150 g/L,
 a flexural modulus of an olefin thermoplastic elastomer that constitutes the expanded beads molded article being from 10 to 100 MPa.   
     
     
         2 . The expanded beads molded article according to  claim 1 , wherein the olefin thermoplastic elastomer is a block copolymer of a polyethylene block and an ethylene/α-olefin copolymer block. 
     
     
         3 . The expanded beads molded article according to  claim 1 , wherein a melting point of the olefin thermoplastic elastomer is from 100 to 130° C. 
     
     
         4 . The expanded beads molded article according to  claim 1 , wherein the olefin thermoplastic elastomer is a multi-block copolymer of a polyethylene block and an ethylene/α-olefin copolymer block. 
     
     
         5 . The expanded beads molded article according to  claim 1 , wherein the expanded beads have through-holes. 
     
     
         6 . A shoe sole cushion formed of the expanded beads molded article according to  claim 1 . 
     
     
         7 - 12 . (canceled)