BIODEGRADABLE POLYESTERS FOR USE IN FORMING FIBERS
    3.
    发明申请
    BIODEGRADABLE POLYESTERS FOR USE IN FORMING FIBERS 审中-公开
    用于成型纤维的生物可降解聚酯

    公开(公告)号:US20100048081A1

    公开(公告)日:2010-02-25

    申请号:US12513557

    申请日:2006-12-15

    IPC分类号: D04H1/00 C08G63/00

    摘要: A method for forming a biodegradable polyester suitable for use in fibers is provided. Specifically, a biodegradable polyester is melt processed at a controlled water content to initiate a hydrolysis reaction. Without intending to be limited by theory, it is believed that the hydroxyl groups present in water are capable of attacking the ester linkage of the polyester, thereby leading to chain scission or “depolymerization” of the polyester molecule into one or more shorter ester chains. By selectively controlling the reaction conditions (e.g., water content, temperature, shear rate, etc.), a hydrolytically degraded polyester may be achieved that has a molecular weight lower than the starting polymer. Such lower molecular weight polymers have a higher melt flow rate and lower apparent viscosity, which are useful in a wide variety of fiber forming applications, such as in the meltblowing of nonwoven webs.

    摘要翻译: 提供一种形成适用于纤维的可生物降解聚酯的方法。 具体地说,将可生物降解的聚酯以受控的水含量熔融加工以引发水解反应。 不期望受理论的限制,据信存在于水中的羟基能够攻击聚酯的酯键,从而导致聚酯分子链断裂或“解聚”成一个或多个较短的酯链。 通过选择性地控制反应条件(例如水含量,温度,剪切速率等),可以获得具有低于起始聚合物的分子量的水解降解的聚酯。 这种较低分子量的聚合物具有较高的熔体流动速率和较低的表观粘度,其可用于多种纤维形成应用中,例如在非织造纤维网的熔喷中。

    BIODEGRADABLE POLYLACTIC ACIDS FOR USE IN FORMING FIBERS
    4.
    发明申请
    BIODEGRADABLE POLYLACTIC ACIDS FOR USE IN FORMING FIBERS 审中-公开
    用于形成纤维的生物可降解聚酯酸

    公开(公告)号:US20100048082A1

    公开(公告)日:2010-02-25

    申请号:US12513558

    申请日:2006-12-15

    IPC分类号: D04H13/00 C08G63/06

    摘要: A method for forming a biodegradable polylactic acid suitable for use in fibers is provided. Specifically, a polylactic acid is melt processed at a controlled water content to initiate a hydrolysis reaction. Without intending to be limited by theory, it is believed that the hydroxyl groups present in water are capable of attacking the ester linkage of polylactic acids, thereby leading to chain scission or “depolymerization” of the polylactic acid molecule into one or more shorter ester chains. The shorter chains may include polylactic acids, as well as minor portions of lactic acid monomers or oligomers, and combinations of any of the foregoing. By selectively controlling the hydrolysis conditions (e.g., moisture and polymer concentrations, temperature, shear rate, etc.), a hydrolytically degraded polylactic acid may be achieved that has a molecular weight lower than the starting polymer. Such lower molecular weight polymers have a higher melt flow rate and lower apparent viscosity, which are useful in a wide variety of fiber forming applications, such as in the meltblowing of nonwoven webs.

    摘要翻译: 提供一种形成适用于纤维的可生物降解的聚乳酸的方法。 具体地说,将聚乳酸以受控的水分进行熔融加工以引发水解反应。 不期望受理论的限制,据信存在于水中的羟基能够攻击聚乳酸的酯键,从而导致聚乳酸分子链断裂或“解聚”成一个或多个较短酯链 。 较短的链可以包括聚乳酸,以及乳酸单体或低聚物的少部分,以及上述任何一种的组合。 通过选择性地控制水解条件(例如水分和聚合物浓度,温度,剪切速率等),可以实现分子量低于起始聚合物的水解降解聚乳酸。 这种较低分子量的聚合物具有较高的熔体流动速率和较低的表观粘度,其可用于多种纤维形成应用中,例如在非织造纤维网的熔喷中。

    Highly breathable biodegradable films
    5.
    发明授权
    Highly breathable biodegradable films 有权
    高度透气的生物降解膜

    公开(公告)号:US08334327B2

    公开(公告)日:2012-12-18

    申请号:US12373976

    申请日:2006-08-31

    摘要: A breathable film having a base layer comprising first filler particles and second filler particles dispersed within a biodegradable polymer matrix is provided. The first filler particles constitute from about 25 wt. % to about 75 wt. % of the base layer and the second filler particles constitute from about 0.1 wt. % to about 10 wt. % of the base layer. The ratio of the average size of the first filler particles to the average size of the second filler particles being from about 2 to about 100. The film exhibits a water vapor transmission rate of about 2,000 g/m2/24 hours or more and a peak load in the machine direction of about 800 grams-force per inch or more.

    摘要翻译: 提供了一种透气膜,其具有包含分散在可生物降解的聚合物基质内的第一填料颗粒和第二填料颗粒的基层。 第一填料颗粒构成约25wt。 %至约75wt。 基础层和第二填料颗粒的%构成约0.1wt。 %至约10wt。 基础层的%。 第一填料颗粒的平均尺寸与第二填料颗粒的平均尺寸的比例为约2至约100.该膜的水蒸气透过率为约2,000g / m 2/24小时以上,峰值 在机器方向负载约800克力/英寸以上。