Patent ID: 8592495
Filing Date: 2013-11-26
Classification: C08J,C08L,Y10T

Abstract:
1. An open-ended tubular expandable thermoplastic resin composite bead obtained by impregnating an open-ended tubular thermoplastic resin composite bead with a physical blowing agent, wherein the thermoplastic resin composite bead comprises 10 to 50 parts by mass of an olefin resin and 50 to 90 parts by mass of a styrene resin, the thermoplastic resin composite bead is prepared by impregnating an open-ended tubular olefin resin seed bead with a styrene monomer and polymerizing the styrene monomer, and the amount of the styrene monomer polymerized with the open-ended tubular olefin resin seed bead is 50 to 90 parts by mass per 100 parts by mass of the total amount of the olefin resin seed beads and the styrene monomer, wherein the expandable thermoplastic resin composite bead has a smallest inner diameter P2 (mm) of not less than 0.4 mm and a smallest outer diameter L2 (mm), wherein the value of a ratio of P2 to L2 (P2/L2) is 0.3 to 0.8.