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    Method for producing polyurethane elastic fiber
    1.
    发明授权
    Method for producing polyurethane elastic fiber 有权

    公开(公告)号：US11618979B2

    公开(公告)日：2023-04-04

    申请号：US17386701

    申请日：2021-07-28

    申请人： SANKO CO., LTD.

    发明人： Akihiko Yoshizato

    IPC分类号： D01F6/70 ,  D01D1/02 ,  D01F6/72 ,  D01F6/78 ,  C08K3/013 ,  C08K3/04 ,  C08K3/22 ,  C08K3/36 ,  C08K5/098 ,  C08L75/02 ,  C08L75/04 ,  D01F1/02

    摘要： A method for producing a polyurethane elastic fiber according to the present invention contains the steps of: [1] producing a polyurethane urea polymer (A) having a number average molecular weight ranging from 12,000 to 50,000, and represented by general formula (1); [2] preparing a spinning dope by adding the polyurethane urea polymer (A) to a polyurethane urea polymer (B); and [3] spinning a polyurethane elastic fiber using the spinning dope. In the formula, R1 and R2 are an alkyl group or a hydroxyalkyl group, R3 is an alkylene group, a polyethyleneoxy group or a polypropyleneoxy group, R4 is a diisocyanate residue, X is a urethane bond or a urea bond, R5 and R6 are a diisocyanate residue, P is a diol residue, Q is a diamine residue, UT is a urethane bond, UA is a urea bond, each of k, 1, m and n is 0 or a positive number.

    Artificial turf with marbled monofilament
    2.
    发明授权
    Artificial turf with marbled monofilament 有权

    公开(公告)号：US11608572B2

    公开(公告)日：2023-03-21

    申请号：US16925393

    申请日：2020-07-10

    申请人： Polytex Sportbelage Produktions-GmbH

    发明人： Stephan Sick ,  Dirk Sander ,  Bernd Jansen ,  Dirk Schmitz

    IPC分类号： D01F8/06 ,  D01D5/08 ,  D01D5/36 ,  D01F1/06 ,  E01C13/08 ,  D01F6/46 ,  D01F6/92 ,  D01D10/02 ,  D01F1/02 ,  D01F8/12 ,  D02J1/22 ,  D01D5/088 ,  D01D5/098 ,  D01F6/90

    摘要： A method of manufacturing artificial turf creating a liquid polymer mixture, wherein the polymer mixture is at least a two-phase system. A first one of the phases includes a first polymer and a first dye, and a second one of the phases of the polymer mixture includes a second polymer and a second dye. The second dye has a different color than the first dye, the second polymer being of the same or of a different type as the first polymer. The first and the second phase are immiscible, the first phase forming polymer beads within the second phase. The method further includes extruding the polymer mixture into a monofilament including a marbled pattern of the first and second color; quenching the monofilament; reheating the monofilament; stretching the reheated monofilament to deform the polymer beads into threadlike regions and to form the monofilament into an artificial turf fiber; and incorporating the artificial turf fiber into an artificial turf backing.

    Strong and tough continuous nanofibers
    3.
    发明授权
    Strong and tough continuous nanofibers 有权

    公开(公告)号：US11414790B2

    公开(公告)日：2022-08-16

    申请号：US15951411

    申请日：2018-04-12

    申请人： NUtech Ventures

    发明人： Yuris Dzenis

    IPC分类号： D01F6/18 ,  D01D5/00 ,  D01D10/02 ,  D01D1/02 ,  D01F1/02

    摘要： A method of fabricating a continuous nanofiber is described. The method includes preparing a solution of one or more polymers and one or more solvents and electrospinning the solution by discharging the solution through one or more liquid jets into an electric field to yield one or more continuous nanofibers. The electrospinning process (i) highly orients one or more polymer chains in the one or more continuous nanofibers along a fiber axis of the one or more continuous nanofibers, and (ii) suppresses polymer crystallization in the one or more continuous nanofibers. The one or more continuous nanofibers can have diameters below about 250 nanometers and exhibit an increase in fiber strength and modulus while maintaining strain at failure, resulting in an increase in fiber toughness.

    MOLDED BODY WHICH COMPRISES ELASTANE INCORPORATED IN CELLULOSE AND MANUFACTURING METHOD
    9.
    发明申请
    MOLDED BODY WHICH COMPRISES ELASTANE INCORPORATED IN CELLULOSE AND MANUFACTURING METHOD 有权

    公开(公告)号：US20210079121A1

    公开(公告)日：2021-03-18

    申请号：US16962502

    申请日：2019-01-14

    申请人： LENZING AKTIENGESELLSCHAFT

    发明人： Christoph KLAUS-NIETROST ,  Richard HERCHL ,  Christian WEILACH

    IPC分类号： C08B16/00 ,  D01F1/02 ,  D01F2/06 ,  B29C48/00

    摘要： A method of manufacturing a molded body which comprises cellulose, wherein the method comprises: i) providing a starting material which comprises cellulose and elastane, in particular wherein the elastane in the starting material is present separated from the cellulose, wherein the starting material is a solid body, and ii) generating the molded body which comprises cellulose, in particular by a lyocell-method or a viscose-method, on basis of the starting material, such that the regenerated cellulosic molded body comprises at least a part of the elastane of the starting material. The part of the elastane of the starting material is incorporated in the regenerated cellulosic molded body. Furthermore, a regenerated cellulosic molded body which comprises elastane incorporated in the cellulose, and which is manufactured according to a lyocell-method or a viscose-method.