METHOD FOR MANUFACTURING FOAMED POLYPROPYLENE-RESIN PARTICLES
    59.
    发明公开
    METHOD FOR MANUFACTURING FOAMED POLYPROPYLENE-RESIN PARTICLES 有权
    用于生产发泡聚丙烯

    公开(公告)号:EP2966119A4

    公开(公告)日:2016-10-26

    申请号:EP14760548

    申请日:2014-03-07

    申请人: KANEKA CORP

    发明人: FUKUZAWA JUN

    IPC分类号: C08J9/18

    摘要: Foamed polypropylene-resin particles are obtained by dispersing polypropylene-resin particles containing polyethylene glycol and/or glycerin together with an aqueous dispersion medium in a pressure-resistant container; introducing carbon dioxide gas as a foaming agent into the pressure-resistant container; impregnating the polypropylene-resin particles with the foaming agent under a heating and pressure condition; and then discharging the polypropylene-resin particles into an area having a lower pressure than an internal pressure of the pressure-resistant container and having an atmosphere temperature of higher than 80°C and not higher than 110°C. The foamed polypropylene-resin particles can yield an in-mold foam molded body at a low heated water vapor pressure for molding, do not lose moldability at a high heated water vapor pressure for molding, have a wide heated water vapor range for molding, exhibit good moldability even when a mold with a complicated shape, a large mold, or a similar mold is used.