公开(公告)号：EP2113006B1

公开(公告)日：2012-12-05

申请号：EP08723266.6

申请日：2008-03-04

申请人： Howtech Corporation Co., Ltd.

发明人： HONG, Bo Na ,  JUNG, Ha Young ,  LIM, Sung Hwan ,  LEE, Gun Min ,  KIM, Dong Kyun

IPC分类号： C08J9/16

CPC分类号： C08J9/18 ,  B29C44/3461 ,  C08J2203/06 ,  C08J2323/02

公开(公告)号：EP2113006A1

公开(公告)日：2009-11-04

申请号：EP08723266.6

申请日：2008-03-04

申请人： Howtech Corporation Co., Ltd.

发明人： HONG, Bo Na ,  JUNG, Ha Young ,  LIM, Sung Hwan ,  LEE, Gun Min ,  KIM, Dong Kyun

IPC分类号： C08J9/16

CPC分类号： C08J9/18 ,  B29C44/3461 ,  C08J2203/06 ,  C08J2323/02

摘要： This invention relates to a method for preparing polyolefin-based foamed particles. More specifically, it provides a method for preparing polyolefin-based foamed particles, which comprises the steps of a dispersion step of mixing polyolefin-based resin particles with a dispersion medium to prepare a dispersion solution, the dispersion medium including at least one selected from sorbate, sorbitan, polyoxyethylene, amine oxide, betaine, and derivatives thereof; a foaming step of adding a foaming agent into the dispersion, heating the mixture to raise a temperature of the mixture, and preparing polyolefin-based foamed particles through pressure drop of the heated mixture; and a separation step of separating the dispersion medium from the prepared polyolefin-based foamed particles to obtain polyolefin-based foamed particles. According to this invention, a dispersion medium that need not wash and can be reused are used, and thus it is not necessary to perform a washing process or a wastewater treatment process, whereby it is possible to simplify the preparation process, reduce the preparation facilities, and therefore, to reduce a preparation cost.