专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4541981A Method for preparing a uniform polyolefinic microporous hollow fiber 失效
标题翻译：制备均匀聚烯烃微孔中空纤维的方法
公开(公告)号：US4541981A
公开(公告)日：1985-09-17
申请号：US504013
申请日：1983-06-13
申请人： James J. Lowery , Neil D. Plotkin , Jack Robinson
发明人： James J. Lowery , Neil D. Plotkin , Jack Robinson
IPC分类号： B29C55/00 , B29D23/00 , D01D5/24 , D02G3/00
CPC分类号： D01D5/24 , B01D69/08
摘要： The present invention provides microporous hollow fiber with improved structural and performance characteristics and a process and apparatus for preparing the improved fiber. The microporous hollow fiber possesses substantially uniform wall thickness, cross-sectional dimensions and porosity. Such characteristics are obtained by melt spinning hollow fiber precursor under defined conditions in a substantially vertically upward direction and subjecting the precursor to a symmetrical quenching step which may be achieved using a hollow annular structure surrounding the precursor. The structure, which is connected to a source of gas, has one or more openings on its inner surface that distribute the gas against the precursor in a substantially uniform manner.
摘要翻译：本发明提供具有改进的结构和性能特征的微孔中空纤维和用于制备改进的纤维的方法和设备。微孔中空纤维具有基本均匀的壁厚，横截面尺寸和孔隙率。这些特性通过在规定的条件下在基本上垂直向上的方向上熔融纺丝中空纤维前体获得，并使前体进行对称的淬火步骤，该步骤可以使用围绕前体的中空环形结构来实现。连接到气体源的结构在其内表面上具有一个或多个开口，以基本均匀的方式将气体分散在前体上。

2. 发明授权

US4405688A Microporous hollow fiber and process and apparatus for preparing such fiber 失效
标题翻译：微孔中空纤维及其制备方法和装置
公开(公告)号：US4405688A
公开(公告)日：1983-09-20
申请号：US349795
申请日：1982-02-18
申请人： James J. Lowery , Neil D. Plotkin , Jack Robinson
发明人： James J. Lowery , Neil D. Plotkin , Jack Robinson
IPC分类号： D01F6/04 , A61M1/18 , B01D67/00 , B01D69/08 , D01D5/24 , D01D5/247 , D01F6/06 , D02J1/22 , D02G3/00
CPC分类号： D01D5/24 , B01D67/0027 , B01D67/0083 , B01D69/08 , B01D2323/08 , Y10T428/2975
摘要： The present invention provides microporous hollow fiber with improved structural and performance characteristics and a process and apparatus for preparing the improved fiber. The microporous hollow fiber possesses substantially uniform wall thickness, cross-sectional dimensions and porosity. Such characteristics are obtained by melt spinning hollow fiber precursor under defined conditions in a substantially vertically upward direction and subjecting the precursor to a symmetrical quenching step which may be achieved using a hollow annular structure surrounding the precursor. The structure, which is connected to a source of gas, has one or more openings on its inner surface that distribute the gas against the precursor in a substantially uniform manner.
摘要翻译：本发明提供具有改进的结构和性能特征的微孔中空纤维和用于制备改进的纤维的方法和设备。微孔中空纤维具有基本均匀的壁厚，横截面尺寸和孔隙率。这些特性通过在规定的条件下在基本上垂直向上的方向上熔融纺丝中空纤维前体获得，并使前体进行对称的淬火步骤，该步骤可以使用围绕前体的中空环形结构来实现。连接到气体源的结构在其内表面上具有一个或多个开口，以基本均匀的方式将气体分散在前体上。

3. 发明授权

US5043113A Process for formation of halogenated polymeric microporous membranes having improved strength properties 失效
标题翻译：用于形成具有改进的强度性能的卤化聚合物微孔膜的方法
公开(公告)号：US5043113A
公开(公告)日：1991-08-27
申请号：US558992
申请日：1990-07-27
申请人： Edward R. Kafchinski , Tai-Shung Chung , Hubert Bader , James J. Lowery
发明人： Edward R. Kafchinski , Tai-Shung Chung , Hubert Bader , James J. Lowery
IPC分类号： C08J9/24 , C08J9/26 , H01M2/16
CPC分类号： C08J9/26 , C08J9/24 , H01M2/1653
摘要： A process for producing a polyhalogenated microporous film having a very narrow pore size distribution and good temperature and chemical resistance. The process involves blending a polyhalogenated copolymer with a polyethyloxazoline utilizing a solvent which is a nonsolvent for the polyhalogenated copolymer but a solvent for polyethyloxazoline, forming a film from the blend, drying the film, heating the film to a temperature at or above the melting point of the polyhalogenated copolymer and under conditions such that the microparticulate particles at their points of mutual contact will neck together to form a relatively continuous matrix and extracting the polyethyloxazoline from the film utilizing a solvent for the binder particle to form a microporous film.
摘要翻译：一种制造具有非常窄的孔径分布和良好的温度和耐化学性的多卤代微孔膜的方法。该方法包括将多卤代共聚物与聚乙基恶唑啉混合，使用对于多卤代共聚物是非溶剂的溶剂，但是用于聚乙基恶唑啉的溶剂，从共混物形成膜，干燥膜，将膜加热到等于或高于熔点的温度的多卤化共聚物，并且在相互接触点处的微粒颗粒将颈部在一起以形成相对连续的基质并且使用用于粘合剂颗粒的溶剂从膜中提取聚乙基恶唑啉以形成微孔膜。

4. 发明授权

US5938922A Contactor for degassing liquids 失效
标题翻译：接触器用于脱气液体
公开(公告)号：US5938922A
公开(公告)日：1999-08-17
申请号：US914740
申请日：1997-08-19
申请人： C. William Fulk, Jr. , James J. Lowery , Charles J. Runkle
发明人： C. William Fulk, Jr. , James J. Lowery , Charles J. Runkle
IPC分类号： B01D19/00 , B01D63/02 , B01D63/04
CPC分类号： B01D19/0031 , B01D63/02 , B01D63/024 , B01D63/043
摘要： A contactor for degassing liquids includes a perforated core, a plurality of microporous hollow fibers, and a shell. The fibers surround the core and have two ends. A tube sheet affixes the ends of the fibers. A baffle is located between the tube sheets. The hollow fibers are closed at the baffle. The shell encloses the fibers, tube sheets, and the baffle. The system for degassing liquids includes a source of liquid containing a gas, a source of vacuum, and the contactor.
摘要翻译：用于脱气液体的接触器包括穿孔芯，多个微孔中空纤维和壳。纤维围绕芯部并具有两个端部。管板粘贴纤维的端部。挡板位于管板之间。中空纤维在挡板处封闭。外壳包围纤维，管板和挡板。用于脱气液体的系统包括含有气体的液体源，真空源和接触器。

5. 发明授权

US5013439A Microporous membranes having increased pore densities and process for making the same 失效
标题翻译：具有增加孔密度的微孔膜及其制造方法
公开(公告)号：US5013439A
公开(公告)日：1991-05-07
申请号：US433450
申请日：1989-11-09
申请人： Harold M. Fisher , Daniel E. Leone , James J. Lowery
发明人： Harold M. Fisher , Daniel E. Leone , James J. Lowery
IPC分类号： B01D67/00 , C08J5/18 , D01D5/24
CPC分类号： D01D5/24 , B01D67/0027 , B01D69/08 , B01D71/26 , C08J5/18 , B01D2323/08 , B01D2325/02 , B01D2325/20
摘要： Disclosed are a process for forming an open-celled microporous membrane (e.g., in film or fiber form) and a novel microporous membrane formed thereby. The process generally includes sequential cold and hot stretching operations, whereby the cold stretching operation is preferably accomplished in a plurality of discrete cold stretching steps. In this regard, the total cold stretch extension is of greater than about 30 percent, and advantageously greater than about 40 percent based upon the initial unstretched length of the nonporous precursor, with this total cold stretch ratio being distributed among a plurality of discrete cold stretching steps. The novel membranes of this invention are characterized by decreased pore size and increased pore densities. For example, the membranes of this invention will have an average pore radius as determined by mercury porosimetry of less than about 0.040 micron. The membranes of this invention, moreover, exhibit a distinctive "bluish" color hue (i.e., a Macbeth Coloreye.TM. b* value of less than about -10 as determined by placing a single ply sample of the membrane against a black background).
摘要翻译：公开了一种用于形成开孔微孔膜（例如，膜或纤维形式）和由其形成的新型微孔膜的方法。该方法通常包括顺序冷和热拉伸操作，由此冷拉伸操作优选在多个分立的冷拉伸步骤中完成。在这方面，基于无孔前体的初始未拉伸长度，总冷拉伸延伸率大于约30％，有利地大于约40％，其总冷拉伸比分布在多个离散冷拉伸脚步。本发明的新型膜的特征在于孔径减小和孔密度增加。例如，本发明的膜将具有通过小于约0.040微米的水银孔率法测定的平均孔半径。此外，本发明的膜表现出独特的“蓝色”色调（即，通过将膜的单层样品放置在黑色背景上来确定的小于约-10的Macbeth Coloreye TM b *值）。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式