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    Filter medium equipped with porous film, method of manufacturing same, filter pack, and filter unit
    5.
    发明授权
    Filter medium equipped with porous film, method of manufacturing same, filter pack, and filter unit 有权
    配有多孔膜的过滤介质，制造方法，过滤器组件和过滤器单元

    公开(公告)号：US09072993B2

    公开(公告)日：2015-07-07

    申请号：US13703860

    申请日：2011-06-08

    申请人： Kunihiko Inui ,  Yoshiyuki Shibuya ,  Shunji Kasai ,  Taku Yamanaka

    发明人： Kunihiko Inui ,  Yoshiyuki Shibuya ,  Shunji Kasai ,  Taku Yamanaka

    IPC分类号： B01D39/16 ,  B01D46/54 ,  B01D46/52

    CPC分类号： B01D39/1692 ,  B01D46/521 ,  B01D46/54 ,  B01D46/543 ,  B01D2239/0654 ,  B01D2239/1208 ,  B01D2239/1216 ,  B01D2239/1291 ,  B01D2275/10

    摘要： A filter medium includes a porous film and a support material supporting the porous film. The porous film includes polytetrafluoroethylene, has an average pore diameter of at least 2.5 μm, and has a porosity of at least 95%. A pressure loss is less than 100 Pa when air is passed through the filter medium at a velocity of 5.3 cm/sec. A collection efficiency of NaCl particles is at least 95% when air including NaCl particles with a particle diameter of 0.3 μm is passed through the filter medium at a velocity of 5.3 cm/sec. A PF value is at least 30, where PF={−log [(100−collection efficiency (%))/100]/pressure loss (Pa)}×1000. A dust holding capacity of polyalphaolefin particles held in the filter medium is at least 15 g/m2 when air including polyalphaolefin particles with a count median diameter of 0.25 μm is continuously passed through the filter medium at a velocity of 5.3 cm/sec and pressure loss reaches 300 Pa.

    摘要翻译： 过滤介质包括多孔膜和支撑多孔膜的支撑材料。 多孔膜包括聚四氟乙烯，平均孔径至少为2.5μm，孔隙率至少为95％。 当空气以5.3cm / sec的速度通过过滤介质时，压力损失小于100Pa。 当含有粒径为0.3μm的NaCl颗粒的空气以5.3cm / sec的速度通过过滤介质时，NaCl颗粒的收集效率至少为95％。 PF值至少为30，其中PF = { - log [（100收集效率（％））/ 100] /压力损失（Pa）}×1000。 当包含计数中值粒径为0.25μm的聚α-烯烃颗粒的空气以5.3cm / sec的速度和压力损失连续通过过滤介质时，保持在过滤介质中的聚α-烯烃颗粒的防尘能力至少为15g / m 2 达到300 Pa

    FILTER MEDIUM EQUIPPED WITH POROUS FILM, METHOD OF MANUFACTURING SAME, FILTER PACK, AND FILTER UNIT
    6.
    发明申请
    FILTER MEDIUM EQUIPPED WITH POROUS FILM, METHOD OF MANUFACTURING SAME, FILTER PACK, AND FILTER UNIT 有权
    带多孔膜的过滤介质，制造方法，过滤器和过滤器

    公开(公告)号：US20130097982A1

    公开(公告)日：2013-04-25

    申请号：US13703860

    申请日：2011-06-08

    申请人： Kunihiko Inui ,  Yoshiyuki Shibuya ,  Shunji Kasai ,  Taku Yamanaka

    发明人： Kunihiko Inui ,  Yoshiyuki Shibuya ,  Shunji Kasai ,  Taku Yamanaka

    IPC分类号： B01D46/00

    CPC分类号： B01D39/1692 ,  B01D46/521 ,  B01D46/54 ,  B01D46/543 ,  B01D2239/0654 ,  B01D2239/1208 ,  B01D2239/1216 ,  B01D2239/1291 ,  B01D2275/10

    摘要： A filter medium includes a porous film and a support material supporting the porous film. The porous film includes polytetrafluoroethylene, has an average pore diameter of at least 2.5 μm, and has a porosity of at least 95%. A pressure loss is less than 100 Pa when air is passed through the filter medium at a velocity of 5.3 cm/sec. A collection efficiency of NaCl particles is at least 95% when air including NaCl particles with a particle diameter of 0.3 μm is passed through the filter medium at a velocity of 5.3 cm/sec. A PF value is at least 30, where PF={−log [(100−collection efficiency (%))/100]/pressure loss (Pa)}×1000. A dust holding capacity of polyalphaolefin particles held in the filter medium is at least 15 g/m2 when air including polyalphaolefin particles with a count median diameter of 0.25 μm is continuously passed through the filter medium at a velocity of 5.3 cm/sec and pressure loss reaches 300 Pa.

    摘要翻译： 过滤介质包括多孔膜和支撑多孔膜的支撑材料。 多孔膜包括聚四氟乙烯，平均孔径至少为2.5μm，孔隙率为95％以上。 当空气以5.3cm / sec的速度通过过滤介质时，压力损失小于100Pa。 当包含粒径为0.3μm的NaCl颗粒的空气以5.3cm / sec的速度通过过滤介质时，NaCl颗粒的收集效率至少为95％。 PF值至少为30，其中PF = { - log [（100收集效率（％））/ 100] /压力损失（Pa）}×1000。 当包含计数中值粒径为0.25μm的聚α-烯烃颗粒的空气以5.3cm / sec的速度连续通过过滤介质并且压力损失时，保持在过滤介质中的聚α-烯烃颗粒的防尘能力为至少15g / m 2 达到300 Pa

    Method for Multi-Stage Expansion and Stretching of Film and Filter
    7.
    发明申请
    Method for Multi-Stage Expansion and Stretching of Film and Filter 审中-公开
    膜和过滤器的多级膨胀和拉伸方法

    公开(公告)号：US20140367325A1

    公开(公告)日：2014-12-18

    申请号：US12483341

    申请日：2009-06-12

    申请人： Kyung-Ju Choi ,  Yoshiyuki Shibuya ,  Kunihiko Inui

    发明人： Kyung-Ju Choi ,  Yoshiyuki Shibuya ,  Kunihiko Inui

    IPC分类号： B01D29/07 ,  B29C55/02

    CPC分类号： B29C55/143 ,  B29C55/005 ,  B29C55/065 ,  B29K2027/18

    摘要： This invention relates to a multi-stage stretching operation for production of expanded stretched porous polytetrafluoroethylene (ePTFE) fibrous materials with minimal node size and minimized filament sizes. A plurality of stretching or expansions may be implemented on the film including combinations of MDO and TDO stretches including at least two longitudinal stretches and at least one transverse stretch. Subsequent stretches occur at rates generally less than a prior similar longitudinal or transverse type of expansion.

    摘要翻译： 本发明涉及用于生产具有最小节点尺寸和最小化的丝尺寸的膨胀的拉伸多孔聚四氟乙烯（ePTFE）纤维材料的多级拉伸操作。 多个拉伸或膨胀可以在膜上实施，包括MDO和TDO拉伸的组合，其包括至少两个纵向延伸和至少一个横向拉伸。 随后的延伸以通常小于先前类似的纵向或横向类型的膨胀的速率发生。

    Method for preparing filtering material
    8.
    发明授权
    Method for preparing filtering material 有权
    过滤材料的制备方法

    公开(公告)号：US07387700B2

    公开(公告)日：2008-06-17

    申请号：US10473803

    申请日：2002-04-03

    申请人： Osamu Tanaka ,  Kunihiko Inui ,  Yoshiyuki Shibuya ,  Hideyuki Kiyotani

    发明人： Osamu Tanaka ,  Kunihiko Inui ,  Yoshiyuki Shibuya ,  Hideyuki Kiyotani

    IPC分类号： B32B37/00 ,  B29C65/00

    CPC分类号： B01D69/10 ,  B01D39/1692 ,  B01D69/02 ,  B01D69/12 ,  B01D71/36 ,  B32B5/32 ,  Y10S55/05

    摘要： A method of manufacturing a filter medium that has a PF value that exceeds 32, the PF value calculated from the pressure loss and the collection efficiency of the filter medium according to the following formula: PF=[−log(permeability (%)/100)/(pressure loss (Pa)]×1000[Formula 1] in which permeability (%)=100−collection efficiency (%). In this method, 380 ml or more of a liquid lubricant at 20° C. is added per 1 kg of a PTFE fine powder, this compound is processed into a tape shape and elongated to obtain a PTFE porous film, and an air permeable support member is heat laminated to at least one surface of the PTFE porous film.

    摘要翻译： 制造PF值超过32的过滤介质的方法，根据压力损失计算的PF值和过滤介质的收集效率根据下式：＆lt;＆lt; in-line-formula description =“In- PF = [ - log（磁导率（％）/ 100）/（压力损失（Pa）] x1000 [公式1] <？in-line-formula description =“In-line Formulas （％）= 100收集效率（％）的“end =”尾“→>在该方法中，每1kg PTFE细粉末加入20℃下的380ml以上液体润滑剂 ，将该化合物加工成带状并拉长以获得PTFE多孔膜，并且将透气性支撑构件热层压到PTFE多孔膜的至少一个表面上。