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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
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。
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公开(公告)号：US4778601A
公开(公告)日：1988-10-18
申请号：US658600
申请日：1984-10-09
申请人： George Lopatin , Larry Y. Yen
发明人： George Lopatin , Larry Y. Yen
CPC分类号： C08J9/28 , B01D67/003 , B01D67/0095 , B01D71/26 , B01D2323/12 , B01D2323/18 , B01D2325/30 , C08J2201/03 , C08J2201/052 , C08J2201/0543 , C08J2201/0546 , C08J2323/06
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-resistant 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防水透气膜。
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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
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。
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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
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。
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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
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。
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公开(公告)号：US4902456A
公开(公告)日：1990-02-20
申请号：US190285
申请日：1988-05-04
申请人： Larry Y. Yen , George Lopatin
发明人： Larry Y. Yen , George Lopatin
CPC分类号： B01D67/003 , B01D67/0083 , B01D67/0095 , B01D71/36 , C08J9/28 , D01D5/24 , 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.
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公开(公告)号：US4874567A
公开(公告)日：1989-10-17
申请号：US42138
申请日：1987-04-24
申请人： George Lopatin , Larry Y. Yen , Randall R. Rogers
发明人： George Lopatin , Larry Y. Yen , Randall R. Rogers
IPC分类号： B32B5/24 , B01D67/00 , B01D71/26 , B29C67/20 , B29K23/00 , B29K105/04 , B29L7/00 , B32B27/12 , C08J5/18 , C08J9/28 , D01D5/24
CPC分类号： D01D5/24 , B01D67/003 , B01D69/08 , B01D71/26 , B32B27/12 , C08J9/28 , B01D2323/12 , C08J2201/0542
摘要： Microporous polypropylene membrane or hollow fibers is formed from a melt blend of 5 to 20 weight percent polypropylene and a solvent. The melt blend is shaped and cooled to effect solid phase separation of the polypropylene from the blend. The solvent is separated from the polypropylene by extraction and the porous polypropylene is dried under restraint to prevent shrinkage.
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公开(公告)号：US4302509A
公开(公告)日：1981-11-24
申请号：US157103
申请日：1980-06-06
申请人： Myron J. Coplan , George Lopatin
发明人： Myron J. Coplan , George Lopatin
CPC分类号： D01D5/34 , D01F1/10 , Y10T428/2927 , Y10T428/2929 , Y10T428/2935 , Y10T428/2975
摘要： Textile-quality multifilament yarns that are highly sorptive for organic vapors, mists and solutes are described. Each filament comprises a microporous polymeric sheath filled with a core of sorptive material. In a multifilament spinneret having a hollow needle in each orifice, a slurry containing the sorptive material is supplied to each needle, and a blend of a polymeric material and a pore-forming material is supplied to the orifice externally of the needle. The spun composite fibers are drawn and subsequently extracted to porosify the sheath and to activate the sorptive property of the cores.
摘要翻译： 描述了对有机蒸气，雾和溶质高度吸附的纺织品质的复丝纱线。 每个细丝包括填充有吸附材料芯的微孔聚合物护套。 在每个孔中具有中空针的复丝喷丝头中，将含有吸附材料的浆料供应到每个针，并且将聚合物材料和成孔材料的共混物供应到针外部的孔口。 拉伸纺出的复合纤维并随后提取以使护套开孔以激活芯的吸附性能。
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9.发明授权Open-celled microporous sorbent-loaded textile fibers and films and methods of fabricating same 失效开孔微孔吸附剂负载纺织纤维和薄膜及其制造方法
公开(公告)号：US4342811A
公开(公告)日：1982-08-03
申请号：US108178
申请日：1979-12-28
IPC分类号： D01D5/08 , B01J20/28 , C08J9/00 , C08J9/26 , D01D5/247 , D01F1/08 , D01F1/10 , B01D39/04 , B01D39/16 , B29D27/00
CPC分类号： B01J20/28028 , B01J20/28004 , B01J20/28023 , B01J20/28026 , B01J20/28033 , B01J20/28042 , C08J9/26 , D01F1/08 , D01F1/10 , Y10S521/918 , Y10T428/249958 , Y10T428/249978 , Y10T428/2927 , Y10T428/298
摘要： Textile quality polymeric fibers and thin films that are highly sorbent for organic and other vapors, mists and solutes. The fibers and films comprise a polymeric matrix with a system of interconnecting micropores, and are highly loaded with particulate sorbents such as activated carbon. The fibers and films are manufactured by forming a melt blend of the sorbent particles, the polymer and a selected diluent, spinning or extruding and drawing down the fiber or film, and extracting the diluent. The diluent functions to permit a high spin or extrusion draw down, to permit the subsequent cold drawing of fibers highly-loaded with active carbon, and to permit the fiber or film to be porosified. Optionally, the diluent may be extracted after or before cold drawing, or without any cold drawing. The fibers and films are highly sorbent, are strong and durable and exhibit substantial strength over an appreciable degree of elongation.
摘要翻译： 纺织品优质的聚合物纤维和薄膜，是有机和其他蒸气，雾和溶质的高吸附剂。 纤维和膜包括具有互连微孔系统的聚合物基质，并且高度负载有诸如活性炭的颗粒吸附剂。 通过形成吸附剂颗粒，聚合物和选择的稀释剂的熔融共混物，纺丝或挤出并拉伸纤维或膜并提取稀释剂来制造纤维和薄膜。 稀释剂用于允许高速旋转或挤出拉伸，以允许随后冷拉高活性炭的纤维，并允许纤维或薄膜开孔化。 任选地，稀释剂可以在冷拔之后或之前提取，或者没有任何冷拉伸。 纤维和薄膜是高吸附剂，坚固耐用，在相当程度的伸长下表现出显着的强度。
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公开(公告)号：US4550123A
公开(公告)日：1985-10-29
申请号：US615672
申请日：1984-06-01
CPC分类号： B01J20/28028 , B01J20/28026 , B01J20/28042 , C08J9/26 , D01F1/08 , D01F1/10
摘要： Textile quality polymeric fibers and thin films that are highly sorbent for organic and other vapors, mists and solutes. The fibers and films comprise a polymeric matrix with a system of interconnecting micropores, and are highly loaded with particulate sorbents such as activated carbon. The fibers and films are manufactured by forming a melt blend of the sorbent particles, the polymer and a selected diluent, spinning or extruding and drawing down the fiber of film, and extracting the diluent. The diluent functions to permit a high spin or extrusion draw down, to permit the subsequent cold drawing of fibers highly-loaded with active carbon, and to permit the fiber or film to be porosified. Optionally, the diluent may be extracted after or before cold drawing, or without any cold drawing. The fibers and films are highly sorbent, are strong and durable and exhibit substantial strength over an appreciable degree of elongation.
摘要翻译： 纺织品优质的聚合物纤维和薄膜，是有机和其他蒸气，雾和溶质的高吸附剂。 纤维和膜包括具有互连微孔系统的聚合物基质，并且高度负载有诸如活性炭的颗粒吸附剂。 通过形成吸附剂颗粒，聚合物和选定的稀释剂的熔融共混物，纺丝或挤出并拉伸薄膜纤维，并提取稀释剂来制造纤维和薄膜。 稀释剂用于允许高速旋转或挤出拉伸，以允许随后冷拉高活性炭的纤维，并允许纤维或薄膜开孔化。 任选地，稀释剂可以在冷拔之后或之前提取，或者没有任何冷拉伸。 纤维和薄膜是高吸附剂，坚固耐用，在相当程度的伸长下表现出显着的强度。
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