| 摘要 |
PROBLEM TO BE SOLVED: To provide thermoplastic resin foaming particles, which does not provide uneveness or miniaturization of bubbles of the foaming particles in a method for preparing thermoplastic resin foaming particles using water as a foaming agent, wherein, with the particles, an in-mold foamed mold having a high accuracy of dimension, which exhibits a good surface performance, and a good fusion performance during in-mold foaming molding. SOLUTION: In a method for preparing thermoplastic resin particles, in which the thermoplastic resin particles are dispersed into a water-based dispersion medium, the thermoplastic resin particles are heated to a temperature of the softening temperature or above, and then the water as the dispersion medium is discharged as a foaming agent to a pressure range lower than the inner pressure of a sealed container, a thermoplastic resin composition as the thermoplastic resin particles, comprising 0.05 pt.wt. to 2 pts.wt. of a polyhydric alcohol having 3-6C and 3 or more of hydroxyl groups, based on 100 pts.wt. of the thermoplastic resin; and a foaming agent, is used. COPYRIGHT: (C)2010,JPO&INPIT
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