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    BIODEGRADABLE POLYLACTIC ACIDS FOR USE IN FORMING FIBERS
    31.
    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

    申请人： Vasily A. Topolkaraev ,  Gregory J. Wideman ,  Ross T. Kaufman ,  Alan E. Wright ,  Jeffrey J. Krueger ,  Jayant Chakravarty

    发明人： Vasily A. Topolkaraev ,  Gregory J. Wideman ,  Ross T. Kaufman ,  Alan E. Wright ,  Jeffrey J. Krueger ,  Jayant Chakravarty

    IPC分类号： D04H13/00 ,  C08G63/06

    CPC分类号： C08G63/912 ,  A61F13/15252 ,  B32B9/04 ,  C08L67/04 ,  C08L71/02 ,  D01D5/0985 ,  D01F6/625 ,  D01F6/92 ,  D01F8/14 ,  D04H3/011 ,  D04H3/02 ,  D04H3/03 ,  D04H3/153 ,  D04H3/16 ,  D04H5/03 ,  D04H5/06 ,  D04H5/08 ,  D04H13/00 ,  Y10T442/60 ,  Y10T442/68 ,  C08L2666/22

    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。

    Fibers Formed from Aromatic Polyester and Polyether Copolymer
    32.
    发明申请
    Fibers Formed from Aromatic Polyester and Polyether Copolymer 有权
    由芳香族聚酯和聚醚共聚物形成的纤维

    公开(公告)号：US20090305594A1

    公开(公告)日：2009-12-10

    申请号：US12136090

    申请日：2008-06-10

    申请人： Aimin He ,  Vasily A. Topolkaraev ,  Alan E. Wright ,  Gregory J. Wideman

    发明人： Aimin He ,  Vasily A. Topolkaraev ,  Alan E. Wright ,  Gregory J. Wideman

    IPC分类号： C08F283/01 ,  D04H13/00

    CPC分类号： D01F6/62 ,  C08F283/01 ,  C08L67/02 ,  C08L71/02 ,  D01F6/66 ,  D04H1/56 ,  D04H1/565 ,  Y10T442/60 ,  Y10T442/68 ,  Y10T442/681 ,  Y10T442/696 ,  C08L2666/22

    摘要： A method for forming a fiber is provided. The method comprises supplying at least one aromatic polyester to a melt processing device and modifying the aromatic polyester with at least one polyether copolymer within the device to form a thermoplastic composition having a melt flow rate that is greater than the melt flow rate of the aromatic polyester. The polyether copolymer contains a repeating unit (A) having the following formula: C2H4Ox   (A) wherein, x is an integer from 1 to 250, the polyether copolymer further containing a repeating unit (B) having the following formula: CnH2nOy   (B) wherein, n is an integer from 3 to 20; and y is an integer from 1 to 150.

    摘要翻译： 提供了一种形成纤维的方法。 该方法包括向熔融加工装置供应至少一种芳族聚酯，并在装置内用至少一种聚醚共聚物改性芳族聚酯以形成熔体流动速率大于芳族聚酯的熔体流动速率的热塑性组合物 。 聚醚共聚物含有具有下式的重复单元（A）：其中，x为1〜250的整数，聚醚共聚物还含有具有下式的重复单元（B）： C n H 2n O（B）其中，n为3至20的整数; y为1〜150的整数。