公开(公告)号：US20180215891A1

公开(公告)日：2018-08-02

申请号：US15744219

申请日：2016-07-13

Applicant: JSP Corporation

Inventor： Taizo KITAHARA ,  Michitoshi ONO ,  Kazuo TSURUGAI

IPC: C08J9/232 ,  C08J9/18 ,  C08K5/136 ,  C08K5/00

CPC classification number: C08J9/232 ,  C08J9/18 ,  C08J2323/10 ,  C08K5/0066 ,  C08K5/01 ,  C08K5/02 ,  C08K5/136 ,  C08L2205/025

Abstract: The present invention is concerned with expanded propylene resin beads including a core layer being in a foamed state, having a tubular shape, and being constituted of a propylene-based resin composition (a) satisfying the following (i) and (ii) and a cover layer being constituted of an olefin-based resin (b) satisfying the following (iii) or (iv). (i) A mixture of 75% by weight to 98% by weight of a propylene-based resin (a1) having a melting point of 100° C. to 140° C. and 25% by weight to 2% by weight of a propylene-based resin (a2) having a melting point of 140° C. to 165° C. (ii) A difference between the melting point of the resin (a2) and the melting point of the resin (a1) is 15° C. or more. (iii) A crystalline olefin-based resin having a melting point TmB that is lower than a melting point TmA of the composition (a) and having a relation of 0° C.

公开(公告)号：US20160333161A1

公开(公告)日：2016-11-17

申请号：US15111760

申请日：2014-12-24

Applicant: JSP CORPORATION

Inventor： Michitoshi ONO ,  Taizo KITAHARA ,  Kazuo TSURUGAI

IPC: C08J9/16

CPC classification number: C08J9/16 ,  C08J9/0061 ,  C08J9/22 ,  C08J9/232 ,  C08J2201/034 ,  C08J2203/06 ,  C08J2323/10 ,  C08J2323/14 ,  C08J2423/06 ,  C08J2423/14

Abstract: The present invention is concerned with expanded propylene resin beads including a core layer being in a foamed state and constituted of a propylene-based resin composition (a) and a cover layer constituted of an olefin-based resin (b), the propylene-based resin composition (a) satisfying the following (i) and (ii), and the olefin-based resin (b) satisfying the following (iii) or (iv). (i) A mixture of 75% by weight to 98% by weight of a propylene-based resin (a1) having a melting point of 100° C. to 140° C. and 25% by weight to 2% by weight of a propylene-based resin (a2) having a melting point of 140° C. to 165° C. (ii) A difference between the melting point of the resin (a2) and the melting point of the resin (a1) is 15° C. or more. (iii) A crystalline olefin-based resin having a melting point TmB that is lower than a melting point TmA of the composition (a) and having a relation of 0° C.