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    METHOD FOR FORMING BIODEGRADABLE POLYLACTIC ACIDS FOR USE IN FORMING FIBERS
    42.
    发明申请
    METHOD FOR FORMING 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乙烯酸的方法

    公开(公告)号：WO2009151439A1

    公开(公告)日：2009-12-17

    申请号：PCT/US2008/066270

    申请日：2008-06-09

    Applicant: KIMBERLY-CLARK WORLDWIDE, INC. ,  KAUFMAN, Ross, T. ,  MCENEANY, Ryan, James ,  TOPOLKARAEV, Vasily, A. ,  HE, Aimin

    Inventor： KAUFMAN, Ross, T. ,  MCENEANY, Ryan, James ,  TOPOLKARAEV, Vasily, A. ,  HE, Aimin

    IPC: D01F6/62 ,  D02J1/22 ,  D03D15/00

    CPC classification number: D01F6/625 ,  D01D1/02 ,  D01D5/08 ,  D04H3/011 ,  D04H3/16

    Abstract: A method for forming a biodegradable polylactic acid suitable for use in fibers is provided. Specifically, a polylactic acid is melt processed in an extruder 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 acid, thereby leading to chain scission or 'depolymerization' of the polylactic acid molecule into one or more shorter ester chains. The extruder within which the polylactic acid is melt processed in a single screw extruder and contains a screw rotatably mounted and received within a barrel. The screw has a length-to-diameter ('L/D') ratio of from about 15 to about 50. With such a single screw extruder, the present inventors have discovered that the reaction components may be effectively mixed together in a highly efficient and cost-effective manner. Further, by selectively controlling the extrusion conditions (e.g., water content, 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.

    Abstract translation: 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，将聚乳酸在受控含水量的挤出机中熔融加工以开始水解反应。 不期望受理论的限制，相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”成一个或多个更短的酯链 。 挤出机，其中聚乳酸在单螺杆挤出机中熔融加工，并包含可旋转地安装并接收在桶内的螺杆。 螺杆具有约15至约50的长径比（'L / D'）。使用这种单螺杆挤出机，本发明人已经发现，反应组分可以高效地混合在一起 并具有成本效益的方式。 此外，通过选择性地控制挤出条件（例如水含量，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。

    BIODEGRADABLE FIBERS FORMED FROM A THERMOPLASTIC COMPOSITION CONTAINING POLYLACTIC ACID AND A POLYETHER COPOLYMER
    44.
    发明申请
    BIODEGRADABLE FIBERS FORMED FROM A THERMOPLASTIC COMPOSITION CONTAINING POLYLACTIC ACID AND A POLYETHER COPOLYMER 审中-公开
    由含有聚酰胺酸和聚醚共聚物的热塑性组合物形成的可生物降解的纤维

    公开(公告)号：WO2009078849A2

    公开(公告)日：2009-06-25

    申请号：PCT/US2007/087339

    申请日：2007-12-13

    Applicant: KIMBERLY-CLARK WORLDWIDE, INC. ,  HE, Aimin ,  TOPOLKARAEV, Vasily, A.

    Inventor： HE, Aimin ,  TOPOLKARAEV, Vasily, A.

    IPC: D04H3/08

    CPC classification number: D01F6/92 ,  D01D5/08 ,  D01D5/0985 ,  D01F8/14 ,  D04H1/4282 ,  D04H1/4326 ,  D04H1/435 ,  D04H1/4382 ,  D04H1/74 ,  D04H3/011 ,  D04H3/016 ,  D04H3/02 ,  D04H13/00 ,  Y10T442/60 ,  Y10T442/68 ,  Y10T442/681

    Abstract: A biodegradable fiber for use in forming a nonwoven web is provided. The fiber is formed from a thermoplastic composition comprising at least one polylactic acid in an amount from about 75 wt.% to about 99 wt.% and at least one polyether copolymer in an amount from about 1 wt.% to about 25 wt.%, wherein the polyether copolymer contains from about 40 mol.% to about 95 mol.% of a repeating unit (A) having the following formula. wherein, x is an integer from 1 to 250, the polyether copolymer further containing from about 5 mol.% to about 60mol.% of a repeating unit (B) having the following formula. wherein, n is an integer from 3 to 20; and y is an integer from 1 to 150. Such polyether copolymers have been found to improve a variety of characteristics of the resulting thermoplastic composition, including its ability to be melt processed into fibers and webs, as well as its sensitivity to moisture.

    Abstract translation: 提供了用于形成非织造纤维网的可生物降解纤维。 纤维由热塑性组合物形成，该热塑性组合物包含至少一种量为约75重量％至约99重量％的聚乳酸和至少一种约1重量％至约25重量％的聚醚共聚物， ，其中所述聚醚共聚物含有约40mol％至约95mol％的具有下式的重复单元（A）。 其中，x为1〜250的整数，聚醚共聚物还含有约5mol％至约60mol％的具有下式的重复单元（B）。 其中n为3至20的整数; 并且y是1至150的整数。已经发现，这种聚醚共聚物可以改善所得热塑性组合物的各种特性，包括其熔融加工成纤维和纤维网的能力，以及其对水分的敏感性。

    MULTICOMPONENT BIODEGRADABLE FILAMENTS AND NONWOVEN WEBS FORMED THEREFROM
    45.
    发明申请
    MULTICOMPONENT BIODEGRADABLE FILAMENTS AND NONWOVEN WEBS FORMED THEREFROM 审中-公开
    多组分可生物降解胶片和非织造布

    公开(公告)号：WO2009024836A1

    公开(公告)日：2009-02-26

    申请号：PCT/IB2007/053351

    申请日：2007-08-22

    Applicant: KIMBERLY-CLARK WORLDWIDE, INC. ,  HE, Aimin ,  WANG, James, H. ,  TOPOLKARAEV, Vasily, A. ,  WIDEMAN, Gregory, J. ,  PALFERY, Doris

    Inventor： HE, Aimin ,  WANG, James, H. ,  TOPOLKARAEV, Vasily, A. ,  WIDEMAN, Gregory, J. ,  PALFERY, Doris

    IPC: D01F8/14

    CPC classification number: D01F8/14 ,  A61F13/15252 ,  B32B5/16 ,  B32B27/12 ,  B32B27/36 ,  B32B2307/7163 ,  D01F6/92 ,  D04H3/03 ,  D04H3/16 ,  D04H13/00 ,  Y10T428/2929 ,  Y10T442/697

    Abstract: A biodegradable, substantially continuous filament is provided. The filament contains a first component formed from at least one high melting polyester and a second component formed from at least one low melting polyester. The low melting point polyester is an aliphatic-aromatic copolyester formed by melt blending a polymer and an alcohol to initiate an alcoholysis reaction that results in a copolyester having one or more hydroxyalkyl or alkyl terminal groups. By selectively controlling the alcoholysis conditions (e.g., alcohol and copolymer concentrations, catalysts, temperature, etc.), a modified aliphatic-aromatic copolyester may be achieved that has a molecular weight lower than the starting aliphatic-aromatic polymer. Such lower molecular weight polymers also have the combination of a higher melt flow index and lower apparent viscosity, which is useful in the formation of substantially continuous filaments.

    Abstract translation: 提供了可生物降解的，基本连续的细丝。 长丝包含由至少一种高熔点聚酯形成的第一组分和由至少一种低熔点聚酯形成的第二组分。 低熔点聚酯是通过熔融共混聚合物和醇以引发醇解反应形成的脂族 - 芳族共聚酯，其导致共聚酯具有一个或多个羟烷基或烷基端基。 通过选择性地控制醇解条件（例如醇和共聚物浓度，催化剂，温度等），可以实现具有低于起始脂族 - 芳族聚合物的分子量的改性脂族 - 芳族共聚酯。 这种低分子量聚合物还具有较高的熔体流动指数和较低的表观粘度的组合，其可用于形成基本连续的长丝。

    METHOD OF MAKING FIBERS AND NONWOVENS WITH IMPROVED PROPERTIES
    48.
    发明申请
    METHOD OF MAKING FIBERS AND NONWOVENS WITH IMPROVED PROPERTIES 审中-公开
    制造纤维的方法和具有改进性能的非纺织品

    公开(公告)号：WO2006130212A1

    公开(公告)日：2006-12-07

    申请号：PCT/US2006/011905

    申请日：2006-03-30

    Applicant: KIMBERLY-CLARK WORLDWIDE, INC. ,  TOPOLKARAEV, Vasily, A. ,  CHAKRAVARTY, Jayant ,  POSSELL, Kevin, Christopher ,  HRISTOV, Hristo, Angelov

    Inventor： TOPOLKARAEV, Vasily, A. ,  CHAKRAVARTY, Jayant ,  POSSELL, Kevin, Christopher ,  HRISTOV, Hristo, Angelov

    IPC: D01F6/62 ,  D01D5/088

    CPC classification number: D04H3/011 ,  D01D5/088 ,  D01F6/625 ,  D04H3/14 ,  D04H3/16 ,  Y10T442/626 ,  Y10T442/681

    Abstract: 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.

    Abstract translation: 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。

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