Foamed celluloid process using expandable beads
    3.
    发明授权
    Foamed celluloid process using expandable beads 有权
    发泡的赛璐id过程使用可膨胀珠

    公开(公告)号:US08696838B1

    公开(公告)日:2014-04-15

    申请号:US13307653

    申请日:2011-11-30

    CPC分类号: C06B25/20 C06B23/002

    摘要: A method of manufacture of foamed celluloid molded products, involving three steps for the manufacture of higher density (0.7 to 1.25 gm/cc) foamed celluloid products or simple geometry lower density (0.2 to 0.7 gm/cc) foamed celluloid products, and four steps for the manufacture of lower density foamed celluloid products of any geometry. The three step process involving: (1) providing small, uniform, pieces of celluloid; (2) presoaking the pieces in a physical blowing agent (PBA) under pressure; and (3) foaming at raised temperature a controlled quantity of the presoaked pieces in a mold—to obtain the desired shape and density. For a lower density foamed celluloid product, of any moldable geometry, the steps are to: (1) small pieces of celluloid, that (2) have been presoaked in a PBA, are (3) pre-expanded to an intermediate density, and then (4) foam the desired lower density foamed product in a mold at raised temperature.

    摘要翻译: 一种制造发泡赛璐id模制产品的方法,包括制造高密度(0.7至1.25gm / cc)发泡赛璐id产品或简单几何形状较低密度(0.2至0.7gm / cc)发泡赛璐id产品的三个步骤,以及四个步骤 用于制造任何几何形状的低密度发泡赛璐id产品。 三步法:(1)提供小而均匀的赛璐,片; (2)在物理发泡剂(PBA)的压力下预浸件; 和(3)在升高的温度下将受控量的预浸渍块在模具中发泡,以获得所需的形状和密度。 对于具有任何可成型几何形状的低密度发泡赛璐id制品,步骤是:(1)将已经预浸在PBA中的(2)的小片赛璐,(3)预膨胀至中间密度,并且 然后(4)在升高的温度下将期望的低密度发泡产品在模具中发泡。