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62 条记录 (耗时 0.029 秒)

    Polymethylpentene filtration medium
    51.
    发明授权
    Polymethylpentene filtration medium 失效
    聚甲基戊烯过滤介质

    公开(公告)号：US5431829A

    公开(公告)日：1995-07-11

    申请号：US169334

    申请日：1993-12-16

    申请人： David B. Pall ,  Colin F. Harwood ,  Isaak Vasserman

    发明人： David B. Pall ,  Colin F. Harwood ,  Isaak Vasserman

    IPC分类号： B01D39/16 ,  D04H3/07 ,  B01D29/66

    CPC分类号： D04H3/07 ,  B01D39/1623

    摘要： The present invention provides a filtration medium comprising a fibrous mass of nonwoven polymethylpentene fibers. Moreover, a filter element comprising the aforesaid fibrous mass of nonwoven polymethylpentene fibers surrounding a perforated, hollow, cylindrical tube is also provided. The present invention further provides a filter cartridge which comprises a housing and the aforesaid filter element.

    摘要翻译： 本发明提供了一种包含非织造聚甲基戊烯纤维的纤维块的过滤介质。 此外，还提供了一种过滤元件，其包括围绕穿孔的中空圆柱形管的上述非织造聚甲基戊烯纤维的纤维块。 本发明还提供一种滤筒，其包括壳体和上述过滤元件。

    Method for determining the wetting characteristic of a porous medium
    54.
    发明授权
    Method for determining the wetting characteristic of a porous medium 失效
    确定多孔介质润湿特性的方法

    公开(公告)号：US4976861A

    公开(公告)日：1990-12-11

    申请号：US487268

    申请日：1990-03-02

    申请人： David B. Pall

    发明人： David B. Pall

    IPC分类号： A61M1/36 ,  B01D39/04 ,  B01D39/14 ,  B01D39/16

    CPC分类号： B01D39/1623 ,  A61M1/3633 ,  B01D39/04 ,  B01D39/14 ,  A61M2202/0413 ,  A61M2202/0439 ,  Y10S210/918

    摘要： This invention provides a method for determining the wetting characteristic of a porous medium comprising applying at least one or more drops of each of at least two different liquids having different but closely spaced surface tensions to different locations on the porous medium and if necessary repeating the process until, of two liquids with neighboring surface tension, one is absorbed into the medium, and the other is not.

    摘要翻译： 本发明提供了一种用于确定多孔介质的润湿特性的方法，包括将具有不同但紧密间隔的表面张力的至少两种不同液体的至少一种或多种液滴施加到多孔介质上的不同位置，如果需要，重复该方法 直到具有相邻表面张力的两种液体中，一种被吸收到介质中，而另一种不被吸收。

    Device and method for depletion of the leukocyte content of blood and blood components
    55.
    发明授权
    Device and method for depletion of the leukocyte content of blood and blood components 失效
    用于消除血液和血液成分的白细胞含量的装置和方法

    公开(公告)号：US4925572A

    公开(公告)日：1990-05-15

    申请号：US259773

    申请日：1988-10-19

    申请人： David B. Pall

    发明人： David B. Pall

    IPC分类号： A61M1/36 ,  B01D39/04 ,  B01D39/14 ,  B01D39/16

    CPC分类号： B01D39/1623 ,  A61M1/3633 ,  B01D39/04 ,  B01D39/14 ,  A61M2202/0413 ,  A61M2202/0439

    摘要： Devices for the depletion of leukocytes in blood products, preferably comprising an upstream porous element including means for removal of gels, at least one intermediate porous element including means for removal of microaggregates, and a downstream element including means for removal of leukocytes by both adsorption and filtration, preferably with at least one of the elements having been modified to a CWST in excess of 53 dynes/cm.

    摘要翻译： 用于血液制品中白细胞消耗的装置，优选包括上游多孔元件，包括用于去除凝胶的装置，至少一个中间多孔元件，包括用于除去微团聚体的装置，以及下游元件，其包括用于通过吸附和/ 过滤，优选地，至少一种元素已被改性为超过53达因/厘米3的CWST。

    Device for depletion of the leukocyte content of blood and blood components
    56.
    发明授权
    Device for depletion of the leukocyte content of blood and blood components 失效
    用于消除血液和血液成分的白细胞含量的装置

    公开(公告)号：US4923620A

    公开(公告)日：1990-05-08

    申请号：US260391

    申请日：1988-10-20

    申请人： David B. Pall

    发明人： David B. Pall

    IPC分类号： A61M1/36 ,  B01D39/04 ,  B01D39/14 ,  B01D39/16

    CPC分类号： A61M1/3633 ,  B01D39/04 ,  B01D39/14 ,  B01D39/1623 ,  A61M2202/0413 ,  A61M2202/0439

    摘要： Devices for the depletion of leukocytes in blood products, preferably comprising an upstream porous element including means for removal of gels, at least one intermediate porous element including means for removal of microaggregates, and a downstream element including means for removal of leukocytes by both adsorption and filtration, preferably with at least one of the elements having been modified to a CWST in excess of 53 dynes/cm.

    摘要翻译： 用于血液制品中白细胞消耗的装置，优选包括上游多孔元件，包括用于去除凝胶的装置，至少一个中间多孔元件，包括用于除去微团聚体的装置，以及下游元件，其包括用于通过吸附和/ 过滤，优选地，至少一种元素已被改性为超过53达因/厘米3的CWST。

    Method of making cylindrical fibrous filter structures
    57.
    发明授权
    Method of making cylindrical fibrous filter structures 失效
    制造圆柱形纤维过滤器结构的方法

    公开(公告)号：US4594202A

    公开(公告)日：1986-06-10

    申请号：US568824

    申请日：1984-01-06

    申请人： David B. Pall ,  Colin F. Harwood ,  Arthur Bradley ,  Timothy R. Brennan

    发明人： David B. Pall ,  Colin F. Harwood ,  Arthur Bradley ,  Timothy R. Brennan

    IPC分类号： B01D39/16 ,  D01D5/08 ,  D04H1/00 ,  D04H1/56 ,  D04H1/72 ,  B01D29/00

    CPC分类号： D01D5/0985 ,  B01D39/1623 ,  B01D39/163 ,  D04H1/56 ,  D04H3/077 ,  D04H3/16 ,  B01D2239/04 ,  B01D2239/065 ,  B01D2239/0654 ,  B01D2239/0695 ,  B01D2239/10 ,  B01D2239/1233

    摘要： Cylindrical fibrous structures comprising a fibrous mass of nonwoven, synthetic, polymeric microfibers wherein the microfibers are substantially free of fiber-to-fiber bonding and secured to each other by mechanical entanglement of intertwining, the fiber structure having a substantially constant voids volume over at least a substantial portion of the structure and, preferably, a graded fiber diameter structure, both as measured in the radial direction. The structures are particularly useful as depth filters.The process for preparing such fibrous structures comprises the steps of:(a) extruding synthetic, polymeric material from a fiberizing die and attenuating the extruded polymeric material to form microfibers by the application of one or more gas streams directed toward a rotating mandrel and a forming roll in operative relationship with the mandrel;(b) cooling the synthetic, polymeric microfibers prior to their collection on the mandrel to a temperature below that at which they bond or fuse together, thereby substantially eliminating fiber-to-fiber bonding; and(c) collecting the cooled microfibers on the mandrel as a nonwoven, synthetic fibrous mass while applying a force on the exterior surface of the collected microfibers by the forming roll; wherein the process variables are controlled to form the cylindrical fiber structure with at least the major portion of the fibrous mass having a substantially constant voids volume.

    摘要翻译： 圆柱形纤维结构包括非织造纤维团，合成的聚合物微纤维，其中微纤维基本上不含纤维与纤维的结合，并通过相互缠结的机械缠结相互固定，所述纤维结构至少具有基本恒定的空隙体积 结构的大部分，并且优选地，在径向方向上测量的分级纤维直径结构。 这些结构特别适用于深度过滤器。 制备这种纤维结构的方法包括以下步骤：（a）从纤维化模头挤出合成的聚合物材料，并通过施加一个或多个指向旋转心轴的气流来减弱挤出的聚合物材料以形成微纤维，并形成 滚动与心轴的操作关系; （b）将合成的聚合物微纤维在其在心轴上收集之前冷却到低于它们粘合或熔合在一起的温度，从而基本上消除纤维与纤维的结合; 和（c）在芯轴上收集冷却的微纤维作为非织造的合成纤维块，同时通过成形辊在收集的微纤维的外表面上施加力; 其中控制所述过程变量以形成所述圆柱形纤维结构，其中所述纤维团的至少主要部分具有基本上恒定的空隙体积。

    Process for preparing hydrophilic polyamide membrane filter media and product
    58.
    发明授权
    Process for preparing hydrophilic polyamide membrane filter media and product 失效
    制备亲水性聚酰胺膜过滤介质和产品的方法

    公开(公告)号：US4340479A

    公开(公告)日：1982-07-20

    申请号：US198569

    申请日：1980-10-20

    申请人： David B. Pall

    发明人： David B. Pall

    IPC分类号： B32B27/34 ,  B01D61/18 ,  B01D65/10 ,  B01D67/00 ,  B01D71/56 ,  C08J5/18 ,  C08J9/28 ,  B01D31/00

    CPC分类号： B01D65/102 ,  B01D61/145 ,  B01D67/0009 ,  B01D69/08 ,  B01D71/56 ,  B01D2313/44 ,  B01D2323/12 ,  B01D2325/022 ,  B01D2325/36 ,  B01D2325/38

    摘要： A process is provided for preparing skinless hydrophilic alcohol-insoluble polyamide membranes by preparing a solution in a polyamide solvent of an alcohol-insoluble polyamide resin having a ratio CH.sub.2 :NHCO of methylene CH.sub.2 to amide NHCO groups within the range from about 5:1 to about 7:1 inducing nucleation of the solution by controlled addition to the solution of a nonsolvent for the polyamide resin, under controlled conditions of concentration, temperature, addition rate, and degree of agitation to obtain a visible precipitate of polyamide resin particles which may or may not thereafter partially or completely redissolve, thereby forming a casting solution; spreading the casting solution on a substrate to form a thin film thereof on the substrate; contacting and diluting the film of casting solution with a mixture of solvent and nonsolvent liquids containing a substantial proportion of the solvent liquid, but less than the proportion in the casting solution, thereby precipitating polyamide resin from the casting solution in the form of a thin skinless hydrophilic membrane; and washing and drying the resulting membrane; the alcohol-insoluble polyamide membranes obtained by this process have the unusual property of being hydrophilic, i.e., readily wetted by water, have absolute particle removal capabilities of the order of 0.1 to 5 .mu.M or more, and are useful as filter media, particularly for producing bacterially sterile filtrates.

    摘要翻译： 提供了一种制备无亲水性醇不溶性聚酰胺膜的方法，该方法是通过在聚酰胺溶剂中制备不溶于聚酰胺树脂的溶液，所述聚酰胺溶剂中亚甲基CH2与酰胺NHCO基团的CH 2 :NCOCO比例在约5:1至约 约7:1通过在浓度，温度，加入速率和搅拌程度的受控条件下，通过控制加入到聚酰胺树脂的非溶剂溶液中来诱导成核，从而获得聚酰胺树脂颗粒的可见沉淀物， 可能不会部分或全部再溶解，从而形成铸塑溶液; 将浇铸溶液铺展在基材上以在基材上形成薄膜; 用含有大部分溶剂液体的溶剂和非溶剂液体的混合物接触和稀释浇铸溶液膜，但小于浇铸溶液中的比例，从而以薄的无皮形式沉淀聚酰胺树脂从浇铸溶液中 亲水膜; 并洗涤和干燥所得膜; 通过该方法获得的不溶于醇的聚酰胺膜具有亲水性，即易于被水润湿的不寻常的性质，具有0.1至5μm或更大量级的绝对颗粒去除能力，并且可用作过滤介质，特别是用作过滤介质 用于生产细菌无菌滤液。

    Collapse-resistant corrugated filter element
    60.
    发明授权
    Collapse-resistant corrugated filter element 失效
    抗皱波纹滤芯

    公开(公告)号：US4154688A

    公开(公告)日：1979-05-15

    申请号：US872863

    申请日：1978-01-27

    申请人： David B. Pall

    发明人： David B. Pall

    IPC分类号： B01D46/52 ,  B01D29/07 ,  B01D29/21 ,  B01D39/14 ,  B01D61/02 ,  B01D61/08 ,  B01D61/10 ,  B01D61/14 ,  B01D61/18 ,  B01D61/20 ,  B01D63/06 ,  B01D63/14

    CPC分类号： B01D29/21 ,  B01D39/14 ,  B01D63/067 ,  B01D2201/0407

    摘要： A corrugated tubular filter element is provided, resistant to corrugation collapse under high differential pressure, although formed of filter sheet material susceptible to such collapse, comprising, in combination, filter sheet material enclosed in a dual layer of more open foraminous sheet material and formed in a closed corrugated configuration having axial corrugation folds arranged in groups with adjacent side surfaces in supporting contact with each other; and, interposed between said groups, solid wedge support elements extending axially of the corrugation folds from end to end of the element having side surfaces in supporting contact with external side surfaces of the end folds of each group, substantially filling the spaces between the end folds of adjacent groups, and confining the folds of each group in substantially parallel array against lateral movement; and a foraminous support sheath disposed at least one of externally and internally of the filter sheet material in supporting contact with adjacent fold ends and retaining the wedge support elements and folds against one of outward and inward movement.

    摘要翻译： {PG，1 A波纹管状过滤器元件，在高压差下能够抵抗波纹塌陷，尽管由易于发生这种塌陷的过滤片材料形成，但组合在一起，包括封闭在更开放的多孔板的双层中的过滤材料 材料并形成为具有轴向波纹折叠的封闭波纹形状，其中相邻侧表面彼此支撑接触; 并且插入在所述组之间，固体楔形支撑元件从所述元件的端部到端部的所述波纹褶皱的轴向延伸，所述侧表面与每个组的端部折叠的外侧表面支撑接触，基本上填充所述端部折叠之间的空间 并且将每组的折叠限制在基本上平行的阵列中以抵抗横向运动; 以及多孔支撑护套，其设置在所述过滤片材料的外部和内部中的至少一个与相邻的折叠端部支撑接触并且保持所述楔形支撑元件并且抵靠所述向外和向内的运动中的一种。