公开(公告)号：US6030428A

公开(公告)日：2000-02-29

申请号：US143574

申请日：1998-08-28

申请人： Toshiaki Ishino ,  Norikane Nabata ,  Takuya Maeoka

发明人： Toshiaki Ishino ,  Norikane Nabata ,  Takuya Maeoka

IPC分类号： C08J9/00 ,  B01D39/08 ,  B01D39/16 ,  B01D67/00 ,  B01D69/10 ,  B01D69/12 ,  B01D71/36 ,  B29C55/00 ,  B29K27/18 ,  B29K105/04 ,  B32B27/12 ,  C08J9/28 ,  D04H13/00 ,  B01D46/10

CPC分类号： C08J9/28 ,  B01D39/083 ,  B01D39/1692 ,  B01D67/0027 ,  B01D69/12 ,  B01D71/36 ,  B29C55/005 ,  B32B27/12 ,  C08J7/18 ,  B01D2239/0233 ,  B01D2239/0464 ,  B01D2239/0627 ,  B01D2239/065 ,  B01D2239/0654 ,  B01D2239/0668 ,  B01D2239/0681 ,  B01D2239/0695 ,  B01D2239/1241 ,  B01D2325/24 ,  B01D2325/40 ,  B29K2027/18 ,  B29K2105/04 ,  C08J2327/18

摘要： A fine powder of polytetrafluoroethylene is mixed with a liquid lubricant, and the mixture is molded into an unsintered sheet by at least one of an extrusion method and a rolling method. The liquid lubricant is removed from the sheet by at least one of a heating method and an extrusion method. This sheet-form molding is stretched in the machine direction to produce a sheet-form polytetrafluoroethylene molding which, upon analysis with a differential scanning calorimeter, gives a crystal fusion curve having an endothermic peak in the temperature range of 345.+-.5.degree. C. and which has a degree of crystallization of from 0.1 to 0.85 and a specific gravity of 1.4 or lower. The molding is then stretched in the transverse direction to produce a porous polytetrafluoroethylene (PTFE) membrane. The process is effective in producing, with good reproducibility, a useful porous PTFE membrane which has a high collection efficiency and a low pressure loss and is reduced in the leakage of coarse particles.

摘要翻译： 将聚四氟乙烯的细粉末与液体润滑剂混合，并通过挤出法和轧制法中的至少一种将混合物成型为未烧结的片材。 液体润滑剂通过加热方法和挤出方法中的至少一种从片材中除去。 该片状成型体在纵向拉伸，制造片状聚四氟乙烯成形体，在通过差示扫描量热计分析时，得到在345 +/- 5℃的温度范围内具有吸热峰的结晶熔融曲线 ，其结晶度为0.1〜0.85，比重为1.4以下。 然后将成型体沿横向拉伸以产生多孔聚四氟乙烯（PTFE）膜。 该方法以良好的再现性生产有效的多孔PTFE膜，其具有高的收集效率和低的压力损失，并且减少了粗颗粒的泄漏。

公开(公告)号：US5910277A

公开(公告)日：1999-06-08

申请号：US857678

申请日：1997-05-16

申请人： Toshiaki Ishino ,  Norikane Nabata ,  Takuya Maeoka

发明人： Toshiaki Ishino ,  Norikane Nabata ,  Takuya Maeoka

IPC分类号： C08J9/00 ,  B01D39/08 ,  B01D39/16 ,  B01D67/00 ,  B01D69/10 ,  B01D69/12 ,  B01D71/36 ,  B29C55/00 ,  B29K27/18 ,  B29K105/04 ,  B32B27/12 ,  C08J9/28 ,  D04H13/00 ,  B29C67/20

CPC分类号： C08J9/28 ,  B01D39/083 ,  B01D39/1692 ,  B01D67/0027 ,  B01D69/12 ,  B01D71/36 ,  B29C55/005 ,  B32B27/12 ,  C08J7/18 ,  B01D2239/0233 ,  B01D2239/0464 ,  B01D2239/0627 ,  B01D2239/065 ,  B01D2239/0654 ,  B01D2239/0668 ,  B01D2239/0681 ,  B01D2239/0695 ,  B01D2239/1241 ,  B01D2325/24 ,  B01D2325/40 ,  B29K2027/18 ,  B29K2105/04 ,  C08J2327/18

摘要： A fine powder of polytetrafluoroethylene is mixed with a liquid lubricant, and the mixture is molded into an unsintered sheet by at least one of an extrusion method and a rolling method. The liquid lubricant is removed from the sheet by at least one of a heating method and an extrusion method. This sheet-form molding is stretched in the machine direction to produce a sheet-form polytetrafluoroethylene molding which, upon analysis with a differential scanning calorimeter, gives a crystal fusion curve having an endothermic peak in the temperature range of 345.+-.5 .degree. C. and which has a degree of crystallization of from 0.1 to 0.85 and a specific gravity of 1.4 or lower. The molding is then stretched in the transverse direction to produce a porous polytetrafluoroethylene (PTFE) membrane. The process is effective in producing, with good reproducibility, a useful porous PTFE membrane which has a high collection efficiency and a low pressure loss and is reduced in the leakage of coarse particles.

摘要翻译： 将聚四氟乙烯的细粉末与液体润滑剂混合，并通过挤出法和轧制法中的至少一种将混合物成型为未烧结的片材。 液体润滑剂通过加热方法和挤出方法中的至少一种从片材中除去。 该片状成型体在纵向拉伸，制造片状聚四氟乙烯成形体，在通过差示扫描量热计分析时，得到在345 +/- 5℃的温度范围内具有吸热峰的结晶熔融曲线 ，其结晶度为0.1〜0.85，比重为1.4以下。 然后将成型体沿横向拉伸以产生多孔聚四氟乙烯（PTFE）膜。 该方法以良好的再现性生产有效的多孔PTFE膜，其具有高的收集效率和低的压力损失，并且减少了粗颗粒的泄漏。

公开(公告)号：US6030484A

公开(公告)日：2000-02-29

申请号：US141110

申请日：1998-08-27

申请人： Takuya Maeoka ,  Norikane Nabata ,  Toshiaki Ishino

发明人： Takuya Maeoka ,  Norikane Nabata ,  Toshiaki Ishino

IPC分类号： B01D39/00 ,  B01D39/16 ,  B01D46/10 ,  B01D67/00 ,  B01D69/10 ,  B01D71/36 ,  B32B5/24 ,  B32B31/04 ,  B32B31/12 ,  B32B31/14

CPC分类号： B01D67/0083 ,  B01D39/1692 ,  B01D46/0001 ,  B01D46/10 ,  B01D69/10 ,  B01D71/36 ,  B32B5/24 ,  Y10S55/05 ,  Y10T428/249981 ,  Y10T428/3154 ,  Y10T442/674 ,  Y10T442/677

摘要： An air filter comprising a laminate of a non-woven fabric made up of polyolefin fibers or polyester fibers or a composite of the non-woven fabrics and a PTFE porous film, wherein the amount of the total gases generated from the air filter is 20 .mu.g/g by the analysis of gas chromatography. The amount of the gases generated from the air filter is greatly reduced by heat-treating the non-woven fabric at a temperature of from 80 to 130.degree. C. for from 5 minutes to 20 minutes before or after laminating with the PTFE porous film.

摘要翻译： 一种空气过滤器，包括由聚烯烃纤维或聚酯纤维构成的无纺布或无纺织物与PTFE多孔膜的复合材料的叠层，其中从空气过滤器产生的总气体的量为20微米 g / g通过气相色谱分析。 通过在PTFE多孔膜层压之前或之后，在80〜130℃的温度下热处理5分钟〜20分钟，从空气过滤器产生的气体的量大大减少。

公开(公告)号：US06214093B1

公开(公告)日：2001-04-10

申请号：US09343688

申请日：1999-06-30

申请人： Norikane Nabata ,  Eizo Kawano ,  Takuya Maeoka

发明人： Norikane Nabata ,  Eizo Kawano ,  Takuya Maeoka

IPC分类号： B01D6300

CPC分类号： B32B27/12 ,  B01D46/10 ,  B01D46/521 ,  B01D67/0027 ,  B01D67/003 ,  B01D69/10 ,  B01D69/12 ,  B01D71/36 ,  B01D2265/04 ,  B01D2275/10 ,  B01D2325/20 ,  B32B5/022 ,  B32B27/08 ,  B32B27/322 ,  B32B2262/12 ,  B32B2305/026 ,  B32B2327/18

摘要： A filter medium for air filters wherein the collection performance of polytetrafluoroethylene (PTFE) membranes is not damaged even after processing, for example, pleating and bonding to air-permeable supporting members. The filter medium containing a laminate (2) containing at least three layers of porous PTFE membranes wherein the pressure drop of a porous PTFE membrane (4) located as an outermost layer has a pressure drop of 1/2 times or less the pressure drop of porous PTFE membrane (5) located as at least one intermediate layer. Air-permeable supporting members (3) are bonded to both outermost layers of the laminate (4) to obtain a filter medium for air filters (1).

摘要翻译： 用于空气过滤器的过滤介质，其中聚四氟乙烯（PTFE）膜的收集性能即使在加工之后也不会损坏，例如打褶和粘合到透气支撑构件。 含有含有至少三层多孔PTFE膜的层叠体（2）的过滤介质，其中位于最外层的多孔PTFE膜（4）的压降为压力降的1/2以下 多孔PTFE膜（5）位于至少一个中间层。 透气性支撑构件（3）与层叠体（4）的最外层粘接，得到空气过滤器（1）用过滤介质。

公开(公告)号：US6149702A

公开(公告)日：2000-11-21

申请号：US315946

申请日：1999-05-21

申请人： Eizo Kawano ,  Norikane Nabata ,  Takuya Maeoka

发明人： Eizo Kawano ,  Norikane Nabata ,  Takuya Maeoka

IPC分类号： B01D69/06 ,  B01D39/16 ,  B01D71/36 ,  B01D29/07 ,  B01D46/10

CPC分类号： B01D39/1692 ,  Y10S55/05

摘要： A filtering medium for air filters wherein its surface conditions have been improved, whereby the porous PTFE membrane is not damaged even after pleating, thus appropriately meeting needs for clean space in clean rooms. The filtering medium comprises a porous polytetrafluoroethylene membrane (2) and an air-permeable supporting member (1) which are laminated such that at least one of exposed surfaces comprises a surface of the air-permeable supporting member (1) having a maximum frictional resistance of 25 gf or less. This filtering medium can be obtained by, for example, press bonding the air-permeable supporting member (1) to the porous membrane (2) under heating and then pressing the surface of the air-permeable supporting member (1) to a silicone roll (4) for smoothing.

摘要翻译： 一种空气过滤器用过滤介质，其表面状态得到改善，即使在打褶之后PTFE多孔膜也不会损坏，从而适当地满足洁净室的清洁空间的需要。 过滤介质包括多孔聚四氟乙烯膜（2）和透气性支撑构件（1），其被层压成使得至少一个暴露表面包括具有最大摩擦阻力的透气性支撑构件（1）的表面 为25gf以下。 该过滤介质可以通过例如在加热下将透气性支撑构件（1）压接到多孔膜（2），然后将透气性支撑构件（1）的表面按压到硅酮辊 （4）用于平滑。

公开(公告)号：US07153565B1

公开(公告)日：2006-12-26

申请号：US09487239

申请日：2000-01-20

申请人： Norikane Nabata ,  Yozo Nagai ,  Eizo Kawano ,  Takuya Maeoka

发明人： Norikane Nabata ,  Yozo Nagai ,  Eizo Kawano ,  Takuya Maeoka

IPC分类号： B32B3/26

CPC分类号： B32B27/08 ,  B32B27/32 ,  B32B27/322 ,  B32B2305/026 ,  B32B2323/04 ,  B32B2327/18 ,  B32B2439/00 ,  Y10T428/249981

摘要： Polytetrafluoroethylene porous film is laminated with an ultra high molecular weight polyolefin porous film to realize excellent formability, dust collecting ability, and permeability that could not be attained by these porous films used alone. The laminate, which can be formed to prescribed shape if desired, is used to make a container for holding an adsorbent.

摘要翻译： 聚四氟乙烯多孔膜与超高分子量聚烯烃多孔膜层叠，以实现单独使用的这些多孔膜不能获得的优异的成形性，集尘能力和渗透性。 如果需要，可以形成为规定形状的层压体用于制造用于保持吸附剂的容器。

公开(公告)号：US06302934B1

公开(公告)日：2001-10-16

申请号：US09437099

申请日：1999-11-09

申请人： Norikane Nabata ,  Yozo Nagai ,  Eizo Kawano ,  Takuya Maeoka

发明人： Norikane Nabata ,  Yozo Nagai ,  Eizo Kawano ,  Takuya Maeoka

IPC分类号： B01D4610

CPC分类号： B01D39/1692

摘要： A filter medium for filters wherein the evolution of organic gases and dusting from a reinforcing member are depressed and thus the excellent characteristics inherent to a porous polytetrafluoroethylene membrane as a collection layer are fully achieved. The filter medium (1) for filters comprises a porous polytetrafluoroethylene membrane (2) and a porous ultrahigh-molecular weight polyolefin membrane (3) as a reinforcing member for the filter medium.

摘要翻译： 一种用于过滤器的过滤介质，其中有机气体的逸出和来自加强构件的除尘被压下，因此完全实现了作为收集层的多孔聚四氟乙烯膜所固有的优异特性。 用于过滤器的过滤介质（1）包括多孔聚四氟乙烯膜（2）和作为过滤介质的增强部件的多孔超高分子量聚烯烃膜（3）。

公开(公告)号：US06808553B2

公开(公告)日：2004-10-26

申请号：US10166739

申请日：2002-06-12

申请人： Eizou Kawano ,  Takuya Maeoka

发明人： Eizou Kawano ,  Takuya Maeoka

IPC分类号： B01D2905

CPC分类号： B01D39/1692 ,  B01D39/163 ,  Y10S55/05

摘要： The present invention is to provide a filter medium for a turbine in which contamination is less likely to be caused in the turbine, and an increase in pressure loss is suppressed. One form of this filter medium includes a porous polytetrafluoroethylene (PTFE) membrane and an air-permeable supporting member. The air-permeable supporting member has a fiber diameter of not more than 15 &mgr;m. This filter medium is used by disposing the air-permeable supporting member on an upstream side of the porous PTFE membrane with respect to air flow passing through the filter medium toward the turbine. Another form of the filter medium of the present invention includes a porous PTFE membrane, a first air-permeable supporting member, and a second air-permeable supporting member.

摘要翻译： 本发明提供一种用于涡轮机的过滤介质，其中不太可能在涡轮机中引起污染，并且抑制了压力损失的增加。 该过滤介质的一种形式包括多孔聚四氟乙烯（PTFE）膜和透气性支撑构件。 透气性支撑构件的纤维直径不大于15μm。 通过将透气性支撑构件设置在多孔PTFE膜的上游侧，相对于通过过滤介质的气流朝向涡轮而使用该过滤介质。 本发明的过滤介质的另一形式包括多孔PTFE膜，第一透气性支撑构件和第二透气性支撑构件。