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    Process for producing fluorocarbon membranes and membrane product
    2.
    发明授权
    Process for producing fluorocarbon membranes and membrane product 失效
    生产氟碳膜和膜产品的方法

    公开(公告)号：US5032274A

    公开(公告)日：1991-07-16

    申请号：US569060

    申请日：1990-08-17

    申请人： Larry Y. Yen ,  George Lopatin ,  Howard Malarkey ,  David Soane

    发明人： Larry Y. Yen ,  George Lopatin ,  Howard Malarkey ,  David Soane

    IPC分类号： B01D67/00 ,  B01D71/36 ,  C08J9/28 ,  D01D5/24

    CPC分类号： D01D5/24 ,  B01D67/0027 ,  B01D67/003 ,  B01D71/36 ,  C08J9/28 ,  B01D2323/12 ,  C08J2327/12

    摘要： Microporous or open ultrafiltration poly (tetrafluoroethylene-co-perfluoro-(alkyl vinyl ether)) (PFA) or poly (tetrafluoroethylene-co-hexafluoropropylene) (FEP) film membrane or hollow fibers having open pores are formed from a melt blend of 10 to 35 weight percent of the PFA or FEP and a chlorotrifluoroethylene oligomer solvent. The melt blend is shaped and one or more surfaces of the shaped melt blend are coated with the solvent prior to phase separation of the melt blend. Coating the membrane with solvent during shaping results in membrane having larger pores on that membrane surface as compared to membranes not coated with solvent. The shaped melt blend is cooled to effect phase separation and crystallization of the PFA or FEP from the blend. The solvent is separated from the PFA or FEP by extraction and the porous PFA or FEP is heat set under restraint to prevent shrinkage. In one embodiment of this invention the dry film membrane recovered after extraction or the membrane wet with extraction liquid is stretched in the cross-web direction to below its breaking limit, dried restrained and then heat-set.

    摘要翻译： 微孔或开放超滤聚（四氟乙烯 - 全氟 - （烷基乙烯基醚））（PFA）或聚（四氟乙烯 - 共 - 六氟丙烯）（FEP）膜或具有开孔的中空纤维由10至 35重量％的PFA或FEP和一氯三氟乙烯低聚物溶剂。 在熔体共混物的相分离之前，将熔融共混物成形，并将成形熔体共混物的一个或多个表面用溶剂涂布。 在成膜过程中用溶剂涂覆膜会导致与没有涂覆溶剂的膜相比，在膜表面具有较大孔的膜。 将成形的熔融共混物冷却以实现PFA或FEP从共混物中的相分离和结晶。 通过提取将溶剂与PFA或FEP分离，并且多孔PFA或FEP在约束下热定型以防止收缩。 在本发明的一个实施方案中，将提取后回收的干膜膜或用提取液润湿的膜在横幅方向拉伸至低于其断裂极限，干燥抑制然后热定形。

    Microporous membranes of ultrahigh molecular weight polyethylene
    3.
    发明授权
    Microporous membranes of ultrahigh molecular weight polyethylene 失效
    超高分子量聚乙烯微孔膜

    公开(公告)号：US4828772A

    公开(公告)日：1989-05-09

    申请号：US192595

    申请日：1988-05-09

    申请人： George Lopatin ,  Larry Y. Yen

    发明人： George Lopatin ,  Larry Y. Yen

    IPC分类号： B01D67/00 ,  B01D71/26 ,  C08J9/28

    CPC分类号： C08J9/28 ,  B01D67/003 ,  B01D71/26 ,  C08J2201/03 ,  C08J2201/052 ,  C08J2201/0543 ,  C08J2201/0546 ,  C08J2323/06 ,  Y10S264/48 ,  Y10S264/62

    摘要： Microporous membranes and methods for producing such membranes from ultrahigh molecular weight polyethylene are described. The method employs extrusion of a solution of UHMW-PE and porogen through a forming die followed by thermal phase separation of polymer and porogen. Microporous structures are created by removing porogen. Microporous membranes produced include membranes with good permeability to air and water making them particularly useful as filtration media and water-resistance breathable membranes.

    摘要翻译： 描述了微孔膜和从超高分子量聚乙烯生产这种膜的方法。 该方法通过成形模挤出UHMW-PE和致孔剂溶液，然后热分解聚合物和致孔剂。 通过去除致孔剂产生微孔结构。 产生的微孔膜包括对空气和水具有良好渗透性的膜，使得它们特别用作过滤介质和耐水透气膜。

    Fluorocarbon membranes and process for making fluorocarbon membranes
    7.
    发明授权
    Fluorocarbon membranes and process for making fluorocarbon membranes 失效
    氟碳膜和氟碳膜制造方法

    公开(公告)号：US4906377A

    公开(公告)日：1990-03-06

    申请号：US346976

    申请日：1989-05-03

    申请人： Larry Y. Yen ,  George Lopatin

    发明人： Larry Y. Yen ,  George Lopatin

    IPC分类号： B01D67/00 ,  B01D71/36 ,  C08J9/28 ,  D01D5/24

    CPC分类号： D01D5/24 ,  B01D67/003 ,  B01D67/0083 ,  B01D67/0095 ,  B01D71/36 ,  C08J9/28 ,  B01D2323/08 ,  C08J2327/12

    摘要： Microporous poly (tetrafluoroethylene-co-perfluoro (alkyl vinyl ether)) (PFA) or poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP) membrane or hollow fibers are formed from a melt blend of 10 to 35 weight percent of PFA or FEP and a chlorotrifluoroethylene oligomer solvent. The melt blend is shaped and cooled to effect phase separation of the PFA or FEP from the blend. The solvent is removed from the PFA or FEP by extraction and the porous PFA or FEP is dried under restraint to prevent shrinkage.

    摘要翻译： 微孔聚（四氟乙烯 - 全氟（烷基乙烯基醚））（PFA）或聚（四氟乙烯 - 共 - 六氟丙烯）（FEP）膜或中空纤维由10至35重量％的PFA或FEP的熔融共混物形成， 一氯三氟乙烯低聚物溶剂。 将熔融共混物成型并冷却以实现PFA或FEP与共混物的相分离。 通过萃取将溶剂从PFA或FEP中除去，并将多孔PFA或FEP在约束条件下干燥以防止收缩。

    Perfluorinated thermoplastic filter cartridge
    8.
    发明授权
    Perfluorinated thermoplastic filter cartridge 有权
    全氟化热塑性滤芯

    公开(公告)号：US07347937B1

    公开(公告)日：2008-03-25

    申请号：US09890290

    申请日：2000-01-28

    申请人： Kwok-Shun Cheng ,  Cha P. Doh ,  Larry Y. Yen ,  Rajnikant B. Patel ,  T. Dean Gates

    发明人： Kwok-Shun Cheng ,  Cha P. Doh ,  Larry Y. Yen ,  Rajnikant B. Patel ,  T. Dean Gates

    IPC分类号： B01D63/06 ,  B01D63/00

    CPC分类号： B01D63/14 ,  B01D61/145 ,  B01D63/02 ,  B01D63/067 ,  B01D71/36 ,  B01D2311/2649 ,  B01D2313/21 ,  B01D2313/44

    摘要： A filtration cartridge having a housing with an inlet and an outlet and a filtration membrane contained within the housing and located between the inlet and the outlet is described. The membrane is sealed in such a manner that all fluid must flow through the membrane between entering the inlet and leaving the outlet of the housing. The entire cartridge, housing, membrane and any other components are all formed of one or more perfluorinated thermoplastic resins. These resins preferably are PFA, MFA, FEP and blends thereof. The membrane may be in the form of hollow fibers, wound fibers such as in a depth filter, or a flat sheet which may be formed into various configurations such as spiral filters, pleated filters, spiral pleated filters, disks and the like. These cartridges provide an inert, high temperature and acid/oxidative chemical resistant filter having properties similar to that of PTFE resins.

    摘要翻译： 描述了具有壳体的过滤筒，其具有入口和出口以及容纳在壳体内且位于入口和出口之间的过滤膜。 膜以这样的方式密封，使得所有流体必须在进入入口并离开壳体的出口之间流过膜。 整个盒，壳体，膜和任何其它部件都由一种或多种全氟化热塑性树脂形成。 这些树脂优选为PFA，MFA，FEP及其共混物。 膜可以是中空纤维，诸如深度过滤器中的缠绕纤维或可形成各种构造的扁平片的形式，例如螺旋过滤器，褶皱过滤器，螺旋褶皱过滤器，盘等。 这些墨盒提供惰性，高温和耐酸/耐氧化的耐化学性过滤器，其特性与PTFE树脂相似。

    Process for producing fluorocarbon membranes and membrane product
    9.
    发明授权
    Process for producing fluorocarbon membranes and membrane product 失效
    生产氟碳膜和膜产品的方法

    公开(公告)号：US4990294A

    公开(公告)日：1991-02-05

    申请号：US412959

    申请日：1989-09-26

    申请人： Larry Y. Yen ,  George Lopatin ,  Howard Malarkey ,  David Soane

    发明人： Larry Y. Yen ,  George Lopatin ,  Howard Malarkey ,  David Soane

    IPC分类号： B01D67/00 ,  B01D71/36 ,  C08J9/28 ,  D01D5/24

    CPC分类号： D01D5/24 ,  B01D67/0027 ,  B01D67/003 ,  B01D67/0083 ,  B01D67/0095 ,  B01D71/36 ,  C08J9/28 ,  B01D2323/08 ,  B01D2325/022 ,  C08J2327/12

    摘要： Microporous or open ultrafiltration poly (tetrafluoroethylene-co-perfluoro-(alkyl vinyl ether)) (PFA) or poly (tetrafluoroethylene-co-hexafluoropropylene) (FEP) film membrane or hollow fibers having open pores are formed from a melt blend of 10 to 35 weight percent of the PFA or FEP and a chlorotrifluoroethylene oligomer solvent. The melt blend is shaped and one or more surfaces of the shaped melt blend are coated with the solvent prior to phase separation of the melt blend. Coating the membrane with solvent during shaping results in membrane having larger pores on that membrane surface as compared to membranes not coated with solvent. The shaped melt blend is cooled to effect phase separation and crystallization of the PFA or FEP from the blend. The solvent is separated from the PFA or FEP by extraction and the porous PFA or FEP is heat set under restraint to prevent shrinkage. In one embodiment of this invention the dry film membrane recovered after extraction or the membrane wet with extraction liquid is stretched in the cross-web direction to below its breaking limit, dried, restrained and then heat-set.

    摘要翻译： 微孔或开放超滤聚（四氟乙烯 - 全氟 - （烷基乙烯基醚））（PFA）或聚（四氟乙烯 - 共 - 六氟丙烯）（FEP）膜或具有开孔的中空纤维由10至 35重量％的PFA或FEP和一氯三氟乙烯低聚物溶剂。 在熔体共混物的相分离之前，将熔融共混物成形，并将成形熔体共混物的一个或多个表面用溶剂涂布。 在成膜过程中用溶剂涂覆膜会导致与没有涂覆溶剂的膜相比，在膜表面具有较大孔的膜。 将成形的熔融共混物冷却以实现PFA或FEP从共混物中的相分离和结晶。 通过提取将溶剂与PFA或FEP分离，并且多孔PFA或FEP在约束下热定型以防止收缩。 在本发明的一个实施方案中，提取后回收的干膜膜或用提取液润湿的膜在横幅方向拉伸至破坏极限以下，干燥，抑制然后热定型。