公开(公告)号：US20180022886A1

公开(公告)日：2018-01-25

申请号：US15542261

申请日：2015-01-09

Applicant: JSP Corporation

Inventor： Masaharu OIKAWA ,  Nobumasa KOSHITA ,  Syouta TAKAGI

IPC: C08J9/228 ,  C08J9/00 ,  C08J9/12 ,  C08J9/16

CPC classification number: C08J9/228 ,  C08J9/0061 ,  C08J9/122 ,  C08J9/16 ,  C08J9/22 ,  C08J9/232 ,  C08J2203/06 ,  C08J2323/16 ,  C08J2423/08 ,  C08J2423/16 ,  C08L23/16 ,  C08L2205/025

Abstract: Provided is an expanded propylene resin bead including a core layer in a foamed state, which includes a propylene-based resin composition (a) satisfying the following (i) and (ii); and a cover layer which includes an olefin-based resin (b) satisfying the following (iii) or (iv): (i) the propylene-based resin composition (a) is a mixture of 65% by weight to 98% by weight of a propylene-based resin (a1) having a melting point of 145° C. to 165° C. and a flexural modulus of 1,200 MPa or more and 35% by weight to 2% by weight of a propylene-based resin (a2) having a melting point of 100° C. to 145° C. and a flexural modulus of 800 MPa to 1,200 MPa; (ii) a difference in a melting point between the resin (a1) and the resin (a2) is 5° C. to 25° C.; (iii) the olefin-based resin (b) is a crystalline olefin-based resin having a melting point (TmB) that is lower than a melting point (TmA) of the composition (a) and being in a relation of (0° C.