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    Controlled coagulation of rigid-chain polymer thin films
    3.
    发明授权
    Controlled coagulation of rigid-chain polymer thin films 失效
    刚性聚合物薄膜的控制凝固

    公开(公告)号：US5492666A

    公开(公告)日：1996-02-20

    申请号：US330500

    申请日：1994-10-20

    Applicant: Chyi-Shan Wang ,  Jar-Wha Lee ,  D. Mark Husband

    Inventor： Chyi-Shan Wang ,  Jar-Wha Lee ,  D. Mark Husband

    IPC: B01D67/00 ,  B01D71/62 ,  B01D71/66 ,  B29C67/06 ,  B29D7/01 ,  B29C39/02

    CPC classification number: B29D7/01 ,  B01D67/0013 ,  B01D71/62 ,  B01D71/66 ,  B01D71/76 ,  B29C67/06 ,  B01D2323/06 ,  B01D2323/12 ,  B29K2065/00 ,  B29K2073/00 ,  B29K2079/00 ,  B29K2081/00 ,  B29K2105/0079 ,  B29K2105/0085 ,  B29K2105/0088 ,  B29L2007/008 ,  B29L2011/00 ,  B29L2031/755

    Abstract: A method for preparing optical quality, thin films of rigid-rod polymers and co-polymers, as well as blends of such polymers or co-polymers with flexible coil-like aromatic heterocyclic polymers and co-polymers which comprises(a) preparing a solution of the rigid-rod polymer or co-polymer or blend in a suitable solvent;(b) forming a film from the solution;(c) exposing the film to a non-solvent vapor for about 1 to 5 minutes per micron thickness in the finished film; and(d) coagulating the film in a non-solvent.This method can be employed to prepare films of high nonlinear optical susceptibility for electro-optical device applications. Because of their thermal stability, mechanical strength and chemical resistance, films prepared according to this method can also be used as filters and separation membranes.

    Abstract translation: 制备光学质量的方法，刚性棒聚合物和共聚物的薄膜，以及这些聚合物或共聚物与柔性线圈状芳族杂环聚合物和共聚物的共混物，其包括（a）制备溶液 的刚性棒状聚合物或共聚物或共混物在合适的溶剂中; （b）从溶液中形成膜; （c）在成品薄膜中将薄膜暴露于非溶剂蒸气约1至5分钟/微米厚度; 和（d）在非溶剂中使膜凝结。 该方法可用于制备用于电光器件应用的高非线性光学敏感性的膜。 由于其热稳定性，机械强度和耐化学性，根据该方法制备的膜也可用作过滤器和分离膜。

    Methods of Orienting Multifilament Yarn and Monofilaments of Poly-4-Hydroxybutyrate and Copolymers Thereof
    6.
    发明申请
    Methods of Orienting Multifilament Yarn and Monofilaments of Poly-4-Hydroxybutyrate and Copolymers Thereof 有权
    定向聚-4-羟基丁酸酯及其共聚物的多丝纱线和单丝的方法

    公开(公告)号：US20160166727A1

    公开(公告)日：2016-06-16

    申请号：US14964985

    申请日：2015-12-10

    Applicant: Tepha, Inc.

    Inventor： Amit Ganatra ,  Fabio Felix ,  Bhavin Shah ,  Matthew Bernasconi ,  Said Rizk ,  David P. Martin ,  Simon F. Williams

    IPC: A61L17/10 ,  B29C55/00 ,  D01F8/14 ,  A61L31/06 ,  A61L31/14

    CPC classification number: D01F6/625 ,  A61L17/105 ,  A61L31/06 ,  A61L31/148 ,  B29C55/005 ,  B29K2073/00 ,  B29K2673/00 ,  B29L2031/731 ,  D01D5/08 ,  D01F8/14 ,  D02G3/04 ,  D10B2331/04 ,  D10B2331/041 ,  D10B2401/063 ,  D10B2509/04 ,  D10B2509/08

    Abstract: Resorbable multifilament yarns and monofilament fibers including poly-4-hydroxybutyrate and copolymers thereof with high tenacity or high tensile strength have been developed. The yarns and fibers are produced by cold drawing the multifilament yarns and monofilament fibers before hot drawing the yarns and fibers under tension at temperatures above the melt temperature of the polymer or copolymer. These yarns and fibers have prolonged strength retention in vivo making them suitable for soft tissue repairs where high strength and strength retention is required. The multifilament yarns have tenacities higher than 8.1 grams per denier, and in vivo, retain at least 65% of their initial strength at 2 weeks. The monofilament fibers retain at least 50% of their initial strength at 4 weeks in vivo. The monofilament fibers have tensile strengths higher than 500 MPa. These yarns and fibers may be used to make various medical devices for various applications.

    Abstract translation: 已经开发了可再吸收的复丝纱线和包括聚-4-羟基丁酸酯的单丝纤维及其具有高强度或高拉伸强度的共聚物。 在高于聚合物或共聚物的熔融温度的温度下，在拉伸纱线和纤维之前，通过冷拉丝多丝纱线和单丝纤维来生产纱线和纤维。 这些纱线和纤维在体内具有延长的强度保持性，使得它们适用于需要高强度和强度保持性的软组织修复。 复丝纱线具有高于8.1克/旦尼尔的强度，并且在体内，在2周时保持其初始强度的至少65％。 单丝纤维在体内4周时保持其初始强度的至少50％。 单丝纤维的拉伸强度高于500MPa。 这些纱线和纤维可用于制造用于各种应用的各种医疗装置。

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