Biodegradable thermoplastic polymer blend compositions with accelerated
biodegradation
    1.
    发明授权
    Biodegradable thermoplastic polymer blend compositions with accelerated biodegradation 失效
    具有加速生物降解性的可生物降解的热塑性聚合物共混组合物

    公开(公告)号:US5852114A

    公开(公告)日:1998-12-22

    申请号:US407083

    申请日:1995-03-20

    摘要: Biodegradable thermoplastic polymer blend compositions are presented in which a first polymer and a second polymer are intimately associated together in a uniform, substantially homogeneous blend. The second polymer of the composition acts to facilitate biodegradation of the composition, and of shaped articles manufactured therefrom, at a rate which is enhanced over that of the most slowly biodegrading individual polymer component of the composition. The composition may further comprise a polysaccharide component, such as a starch component like destructurized starch.

    摘要翻译: 提出了可生物降解的热塑性聚合物共混物组合物,其中第一聚合物和第二聚合物以均匀的基本上均匀的共混物紧密地结合在一起。 组合物的第二聚合物用于促进组合物及其制备的成形制品的生物降解,其速率比组合物中缓慢生物降解的单一聚合物组分的速率增强。 组合物还可以包含多糖组分,例如淀粉组分如无序结构淀粉。

    Biodegradable composite polymeric articles comprising polyvinyl alcohol
    2.
    发明授权
    Biodegradable composite polymeric articles comprising polyvinyl alcohol 失效
    包含聚乙烯醇的可生物降解的复合聚合物制品

    公开(公告)号:US5798152A

    公开(公告)日:1998-08-25

    申请号:US332634

    申请日:1994-10-31

    申请人: Henry Guy Stevens

    发明人: Henry Guy Stevens

    IPC分类号: B32B27/08 B32B7/02 B29C45/14

    摘要: Composite polymeric articles, which may be in layer or film form, comprise a larger portion of a polymer which is water soluble at 20.degree. C. against a smaller proportion of a polymer which is substantially water-insoluble at that temperature. For example, a layer product may have a thin layer (e.g. less than 5 microns) of insoluble polymer superimposed on a thicker layer (e.g. at least 20 microns) of soluble polymer. Both polymers are conveniently polyvinyl alcohol, which is non-toxic and useful in a number of domestic applications, e.g. as a diaper backing sheet. The insoluble portion gives water resistance but negligible mechanical strength; the soluble part gives the mechanical strength. On dissolution of the soluble portion, the insoluble portion disintegrates mechanically. Articles may be made by co-extrusion or by molding.

    摘要翻译: 可以为层或膜形式的复合聚合物制品包含大部分聚合物,其在20℃下可溶于较小比例的聚合物,该聚合物在该温度下基本上不溶于水。 例如,层产品可以具有叠加在较厚层(例如至少20微米))可溶性聚合物上的薄层(例如小于5微米)的不溶性聚合物。 两种聚合物都是方便的聚乙烯醇,其是无毒的并且在许多家用应用中是有用的。 作为尿布背衬片。 不溶部分产生耐水性但机械强度可忽略不计; 可溶部分赋予机械强度。 在可溶部分溶解时,不溶部分机械分解。 制品可以通过共挤出或通过模塑制成。