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    Method of making fibers and nonwovens with improved properties
    8.
    发明授权
    Method of making fibers and nonwovens with improved properties 有权
    制造具有改进性能的纤维和无纺布的方法

    公开(公告)号：US07780903B2

    公开(公告)日：2010-08-24

    申请号：US11142791

    申请日：2005-06-01

    申请人： Vasily A. Topolkaraev ,  Jayant Chakravarty ,  Kevin Christopher Possell ,  Hristo Angelov Hristov

    发明人： Vasily A. Topolkaraev ,  Jayant Chakravarty ,  Kevin Christopher Possell ,  Hristo Angelov Hristov

    IPC分类号： D01D5/088 ,  D01D5/098 ,  D01D5/12 ,  D01F1/10 ,  D04H3/02

    CPC分类号： D04H3/011 ,  D01D5/088 ,  D01F6/625 ,  D04H3/14 ,  D04H3/16 ,  Y10T442/626 ,  Y10T442/681

    摘要： The present invention can provide a distinctive method and process for making polymer fibers (62) and nonwoven fabric webs (60). The method can include providing a fiber material that exhibits a low crystallization rate. In a particular aspect, the fiber material can be subjected to an anneal-quench at an anneal-quench temperature that approximates a prime-temperature at which the polymer material most rapidly crystallizes. In another aspect, the fiber material can be subjected to a fiber-draw at a selected fiber-draw temperature, and in a further aspect, the fiber-draw temperature can be configured to approximate the prime-temperature of the polymer material. In still other aspects, the fiber material can be subjected to a relatively small amount of fiber-draw, and the fiber-draw can be provided at a relatively low fiber-draw speed.

    摘要翻译： 本发明可以提供制造聚合物纤维（62）和非织造织物网（60）的独特方法和方法。 该方法可以包括提供表现出低结晶速率的纤维材料。 在特定方面，纤维材料可以在接近聚合物材料最快结晶的初始温度的退火淬火温度下进行退火淬火。 在另一方面，纤维材料可以在所选择的纤维拉伸温度下进行纤维拉伸，而在另一方面，纤维拉伸温度可以构造成接近聚合物材料的初始温度。 在其它方面，纤维材料可以经受较少量的纤维拉伸，并且可以以相对低的纤维拉伸速度提供纤维拉伸。

    FIBERS AND NONWOVENS FABRICS WITH IMPROVED PROPERTIES
    9.
    发明申请
    FIBERS AND NONWOVENS FABRICS WITH IMPROVED PROPERTIES 审中-公开
    具有改进性能的纤维和非织造织物

    公开(公告)号：US20100318050A1

    公开(公告)日：2010-12-16

    申请号：US12835868

    申请日：2010-07-14

    申请人： Vasily A. Topolkaraev ,  Jayant Chakravarty ,  Kevin Christopher Possell ,  Hristo Angelov Hristov

    发明人： Vasily A. Topolkaraev ,  Jayant Chakravarty ,  Kevin Christopher Possell ,  Hristo Angelov Hristov

    IPC分类号： A61F13/15 ,  B32B27/02 ,  D04H1/56 ,  D01D5/00 ,  D04H3/02

    CPC分类号： D04H3/011 ,  D01D5/088 ,  D01F6/625 ,  D04H3/14 ,  D04H3/16 ,  Y10T442/626 ,  Y10T442/681

    摘要： The present invention can provide a distinctive article which includes a plurality of fibers (62), wherein the fibers include a selected polymer, fiber material. In a particular aspect, the fiber material can exhibit a “low” crystallization rate. In other aspects, the fiber material has been subjected to a low fiber-draw percentage, and the polymer in the fibers can have a high crystalline content of at least 30%. In still other aspects, the fibers can be configured to provide a fibrous web (60), and the fibrous web (60) can have a distinctive tensile strength quotient, with respect to tensile strengths along its machine-direction (22) and cross-direction (24).

    摘要翻译： 本发明可以提供包括多个纤维（62）的独特制品，其中纤维包括选定的聚合物纤维材料。 在特定方面，纤维材料可以表现出“低”的结晶速率。 在其它方面，纤维材料已经经受低纤维拉伸百分数，并且纤维中的聚合物可以具有至少30％的高结晶含量。 在另外的方面，纤维可以被配置成提供纤维网（60），并且纤维网（60）可以具有相对于沿其机器方向（22）的拉伸强度和横截面 方向（24）。

    BIODEGRADABLE POLYLACTIC ACIDS FOR USE IN FORMING FIBERS
    10.
    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。