Enhanced process for the production of expanded PVC and plastic materials based on expanded PVC obtained therewith
    3.
    发明授权
    Enhanced process for the production of expanded PVC and plastic materials based on expanded PVC obtained therewith 有权
    用于生产基于由其获得的膨胀PVC的膨胀PVC和塑料材料的增强方法

    公开(公告)号:US08492446B2

    公开(公告)日:2013-07-23

    申请号:US13697516

    申请日:2011-06-07

    IPC分类号: C08J9/32 B29C44/02

    摘要: A process for the production of expanded PVC of the type includes heating a mass of polymeric mixture inside a closed mold; controlling the expansion of the mass in an environment having a constant volume defined by the closed mold, control being performed by the presence, in the mass of polymeric mixture, of microparticles of a compressible material, suitable for being contracted, under the action of the pressure generated by the formation and expansion of microcells of expanding gas in the same mass, from an initial form having a larger volume, to a form having a smaller volume; and expanding the microparticles, from their configuration to the initial configuration, the density of the expanded material thus obtained being determined by the contemporary presence of both microcells of expanding gas and the microparticles in their configuration having a larger volume.

    摘要翻译: 用于生产这种类型的膨胀PVC的方法包括在封闭模具内加热聚合物混合物; 在由闭合模具限定的具有恒定体积的环境中控制质量的膨胀,控制是通过在聚合物混合物的质量下存在适合于收缩的可压缩材料的微粒, 由具有较大体积的初始形式的相同质量的膨胀气体的微细胞的形成和膨胀产生的压力形成具有较小体积的形式; 并且将微粒从其构型扩展到初始构型,由此获得的膨胀材料的密度由发泡气体的微细胞和具有较大体积的微结构的当前存在来确定。