SMALL-DIAMETER STYRENE-BASED FOAMABLE RESIN PARTICLE, FOAMED BEAD AND MOLDING

摘要

PROBLEM TO BE SOLVED: To obtain a small-diameter styrene-based foamable resin particle having excellent foaming moldability, a small-diameter styrene-based foamed bead and a foamed molding produced from the styrene-based foamed bead, especially a container having excellent appearance and slight leakage of an inside liquid to the outside. SOLUTION: The small-diameter styrene-based foamable resin particle has weight-average molecular weight not reducing toward the surface and 0.2-0.6 mm average particle diameter in a part obtained by dividing a resin particle from the surface toward the center into three parts to give a surface part forming 1/3 from the surface and further dividing the surface part from the surface toward the center into four parts to give a part forming 1/4-4/4 from the surface. COPYRIGHT: (C)2005,JPO&NCIPI