Expandable starch-based beads and method of manufacturing molded articles therefrom
    8.
    发明申请
    Expandable starch-based beads and method of manufacturing molded articles therefrom 审中-公开
    可膨胀淀粉类珠粒及其制造模塑制品的方法

    公开(公告)号:US20070021515A1

    公开(公告)日:2007-01-25

    申请号:US11184614

    申请日:2005-07-19

    IPC分类号: C08J9/00

    摘要: An expandable starch-based composition includes a starch, a volatile blowing agent, a non-volatile plasticizer, nucleating agent, and a water-resistant polymer. The expandable starch-based composition can be characterized by having a plasticized starch capable of expanding when rapidly heated to above the boiling point of the volatile blowing agent and the softening point of the plasticized starch. The composition can be used in a method of manufacturing an expandable starch-based bead, wherein the method includes: introducing the composition into an extruder; heating and mixing the composition in order to yield a thermoplastic melt; extruding the thermoplastic melt through a die opening to yield an extruded strand; cooling the extruded strand; and cutting the cooled strand in to beads. The beads can be used in a method of manufacturing a biodegradable article, the method includes: providing a plurality of expandable starch-based beads; placing the beads into a mold cavity; rapidly heating the beads to a temperature greater than the boiling point of the volatile blowing agent; causing at least a portion of the expanded beads to adhere together to form an intermediate molded body; and cooling the intermediate molded body to yield the article of manufacture.

    摘要翻译: 一种可膨胀的淀粉基组合物包括淀粉,挥发性发泡剂,不挥发性增塑剂,成核剂和耐水聚合物。 可膨胀淀粉基组合物的特征在于具有当被快速加热到高于挥发性发泡剂的沸点以及增塑淀粉的软化点时能够膨胀的增塑淀粉。 该组合物可用于制造可膨胀淀粉基珠粒的方法,其中该方法包括:将组合物引入挤出机中; 加热和混合组合物以产生热塑性熔体; 通过模头挤出热塑性熔体以产生挤出的股线; 冷却挤出的股线; 并将冷却的线切割成珠。 珠粒可以用于制造可生物降解的制品的方法,该方法包括:提供多个可膨胀淀粉类珠粒; 将珠子放入模腔中; 将珠子快速加热至大于挥发性发泡剂沸点的温度; 使至少一部分发泡珠粒粘附在一起形成中间成型体; 并冷却中间成型体以产生制品。