Methods of manufacture of polylactic acid foams
    5.
    发明授权
    Methods of manufacture of polylactic acid foams 有权
    聚乳酸泡沫的制造方法

    公开(公告)号:US08283389B2

    公开(公告)日:2012-10-09

    申请号:US12449098

    申请日:2008-01-30

    IPC分类号: C08J9/18 C08L67/04

    摘要: Method of forming a composition comprising impregnated polylactic acid (PLA) resin beads, by impregnating PLA resin beads with CO2. The method is carried out by contacting the beads with liquid CO2, and holding the impregnated beads at a temperature and pressure that prevents the beads from foaming while allowing the level of impregnated CO2 to reduce to about 4 to 20 weight % relative to the total weight of the beads and CO2.

    摘要翻译: 通过用CO 2浸渍PLA树脂珠来形成包含浸渍的聚乳酸(PLA)树脂珠粒的组合物的方法。 该方法通过使珠粒与液体CO 2接触并将浸渍的珠粒保持在防止珠粒发泡的温度和压力下进行,同时允许浸渍的CO 2水平相对于总重量减少至约4至20重量% 的珠子和二氧化碳。

    METHODS OF MANUFACTURE OF POLYLACTIC ACID FOAMS
    6.
    发明申请
    METHODS OF MANUFACTURE OF POLYLACTIC ACID FOAMS 有权
    聚酰胺酸法制备方法

    公开(公告)号:US20100029793A1

    公开(公告)日:2010-02-04

    申请号:US12449098

    申请日:2008-01-30

    IPC分类号: C08J9/18 B29C44/00

    摘要: A method of forming a composition of expanded polylactic acid (PLA) resin beads comprising impregnating PLA resin beads with CO2 and holding the impregnated beads at a temperature and pressure that prevents the beads from foaming while allowing the level of impregnated CO2 to reduce. The method may comprise pre-expanding the beads at a pre-expansion temperature. Promptly following pre-expansion or after a desired storage period, the method may comprise introducing the pre-expanded beads into a mould and further expanding and fusing the beads in the mould by application of a temperature greater than the temperature used for pre-expansion. Preferred moulded products include moulded blocks and shaped moulded products, especially blocks adapted to form packing material. Other preferred moulded products include convenience items such as containers including clamshell containers, pots, boxes, bowls, cups, plates and trays.

    摘要翻译: 一种形成膨胀聚乳酸(PLA)树脂珠粒的组合物的方法,其包括用CO 2浸渍PLA树脂珠粒并保持浸渍的珠粒的温度和压力,以防止珠粒发泡,同时允许浸渍的CO 2水平降低。 该方法可以包括在预膨胀温度下预膨胀珠粒。 在预膨胀之后或在期望的储存期后,该方法可以包括将预发泡的珠粒引入模具中,并通过施加大于用于预膨胀的温度的温度进一步膨胀和熔合模具中的珠粒。 优选的成型产品包括模制块和成形模制产品,特别是适于形成包装材料的块。 其他优选的模制产品包括方便物品,例如容器,包括蛤壳式容器,盆,箱,碗,杯,盘和托盘。