Hybrid tire cord and method for manufacturing the same

    公开(公告)号:US10196765B2

    公开(公告)日:2019-02-05

    申请号:US15393591

    申请日:2016-12-29

    Abstract: A hybrid tire cord has more uniform physical properties, and improved strength and fatigue resistance. The hybrid tire cord can easily be manufactured. The hybrid tire cord includes a nylon primarily twisted yarn and an aramid primarily twisted yarn, wherein the nylon primarily twisted yarn and the aramid primarily twisted yarn are secondarily twisted together, and after untwisting of the secondary twisting of the hybrid tire cord having a predetermined length, a length of the aramid primarily twisted yarn is 1.005 to 1.025 times a length of the nylon primarily twisted yarn.

    ARAMID PAPER, MANUFACTURING METHOD THEREFOR, AND USE THEREOF

    公开(公告)号:US20180142415A1

    公开(公告)日:2018-05-24

    申请号:US15577477

    申请日:2016-05-27

    Inventor: Bum-Hoon LEE

    CPC classification number: D21H13/26 D21G1/00 D21H27/30 H01B3/52

    Abstract: The present disclosure relates to an aramid paper for a honeycomb, which is prepared by mixing, with an aramid floc, an aramid pulp having a fiber length equal to or longer than a predetermined length and a fibril development equal to or higher than a predetermined level, at a predetermined ratio, a wholly aromatic aramid paper for an electrical insulation paper having superior paper formation property and thus having uniform electrical insulation property, which is prepared by mixing an aramid pulp having a fines content equal to or higher than a predetermined ratio at a predetermined ratio, a laminated aramid paper having a uniform thermal expansion coefficient, uniform electrical conductivity and uniform thermal conductivity, which is prepared by laminating an aramid paper with superior paper formation property on an aramid paper with superior paper strength by calendering, and a method for preparing the same. The aramid paper according to the present disclosure is applicable to a material or a component which requires precision with little difference in physical properties such as a thermal expansion coefficient, electrical conductivity and thermal conductivity. Specifically, it is applicable to a honeycomb, an electrical insulation paper, a PCB substrate, etc. because it has superior paper strength and paper formation property. Moreover, the method for preparing an aramid paper can solve the problems of poor transfer of a base paper, nonuniformity of strength and aggregation between flocs.

    BUNDLE OF HOLLOW FIBER MEMBRANES AND MANUFACTURING METHOD THEREFOR

    公开(公告)号:US20180028979A1

    公开(公告)日:2018-02-01

    申请号:US15550145

    申请日:2016-02-12

    Abstract: Disclosed are a bundle of hollow fiber membranes to improve use efficiency of the hollow fiber membranes and a method of manufacturing the same. The bundle of hollow fiber membranes includes a plurality of yarns to form fluid channels and serve as spacers disposed between the hollow fiber membranes to create a bundle. The method includes spinning including supplying a spinning dope to a nozzle and conducting spinning to form a plurality of hollow fiber membranes, coagulating the hollow fiber membranes formed during spinning, and yarn feeding including inserting a plurality of yarns between the hollow fiber membranes to form a bundle. The method is effective in uniformly distributing a fluid through fluid channels formed between the hollow fiber membranes and maximizes usage efficiency of the hollow fiber membranes.

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