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1. 发明专利

JP2000300921A AIR FILTER MATERIAL AND AIR FILTER UNIT USING THE SAME 失效
公开(公告)号：JP2000300921A
公开(公告)日：2000-10-31
申请号：JP11392199
申请日：1999-04-21
申请人： NITTO DENKO CORP
发明人： MAEOKA TAKUYA , NAHATA NORIKANE , KAWANO EIZO
IPC分类号： B01D69/12 , B01D39/16 , B01D46/00 , B01D46/54 , B01D71/36
摘要： PROBLEM TO BE SOLVED: To provide an air filter material prevented from a clogging caused by collected dust and capable of suppressing the rise in pressure loss. SOLUTION: In the air filter material including a polytetrafluoroethylene porous membrane 1 and an air permeable porous fiber material 2, the air permeable porous fiber material 2 with a fiber diameter of 1-15 μm, a void ratio of 70% or more and a basis wt. of 60 g/m2 or more is disposed on the upstream side of the polytetrafluoroethylene porous membrane 1. As the air permeable porous fiber material 2, a nonwoven fabric is pref. and, as the material quality thereof, polyethylene, polypropylene or polyethylene terephthalate can be used.

2. 发明专利

JP2000225328A FILTER MEDIUM FOR FILTER 失效
公开(公告)号：JP2000225328A
公开(公告)日：2000-08-15
申请号：JP22370999
申请日：1999-08-06
申请人： NITTO DENKO CORP
发明人： NAHATA NORIKANE , NAGAI YOZO , KAWANO EIZO , MAEOKA TAKUYA
IPC分类号： B01D71/26 , B01D39/16 , B01D71/36 , B32B5/32 , C08J9/24 , C08J9/26
摘要： PROBLEM TO BE SOLVED: To enhance the cleanness of an environment in a clean room using the original properties of a porous film of a polytetrafluoroethylene(PTFE) by forming a filter medium for a filter of a laminate containing an ultra high molecular weight polyolefin porous film and a PTFE porous film. SOLUTION: The filter medium 1 for a filter is formed by laminating at least one layer of a PTFE porous film 2 and at least one layer of an ultra high molecular weight polyolefin porous film 3. In addition, the degree of dust generation by a tear and rub test is set at 500 pcs/cf or less. In addition, the amount of either one selected from chemical compounds such as DOP, BHT or DBP quantitatively determined by gas chromatography is set at 2 μg/g or less (2 ppm or less). Further, an ultra high molecular weight polyethylene porous film is adopted as the ultra high molecular weight polyolefin porous film 3. Alternatively, a film of a porous structure formed of voids among the connected particles of the ultra high molecular weight polyolefin is adopted.

3. 发明专利

JP2009050851A Production method of filter medium for air filter 有权
标题翻译：空气过滤器过滤介质的生产方法
公开(公告)号：JP2009050851A
公开(公告)日：2009-03-12
申请号：JP2008267249
申请日：2008-10-16
申请人： Nitto Denko Corp , 日東電工株式会社
发明人： KAWANO EIZO , NAHATA NORIKANE , MAEOKA TAKUYA
IPC分类号： B01D63/14 , B01D69/10 , B01D71/36 , B32B5/24 , B32B27/30
摘要： PROBLEM TO BE SOLVED: To prevent a PTFE porous membrane from being damaged even when a filter medium is pleated through pleating work by improving the surface state of the filter medium and to provide the filter medium for air filter suitable to a clean space required for a clean room. SOLUTION: A polytetrafluoroethylene porous membrane 2 and an air-permeable supporting material 1 are stacked so that at least one exposed face is formed out of the surface of the air permeable supporting material 1 by making the maximum frictional resistance to less than 25 gf to obtain the filter medium for an air filter. This filter medium is obtained, for example, by pressing the surface of the air-permeable supporting material 1 onto a silicone roll to smooth it. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了防止PTFE多孔膜即使通过改进过滤介质的表面状态通过打褶工作打褶过滤介质也被损坏并且提供适合于清洁空间的空气过滤器的过滤介质需要一个洁净室。解决方案：聚四氟乙烯多孔膜2和透气性支撑材料1层叠，使得至少一个暴露面由透气性支撑材料1的表面形成，使得最大摩擦阻力小于25 gf以获得用于空气过滤器的过滤介质。该过滤介质例如通过将透气性支撑材料1的表面压在硅酮辊上而使其平滑化而获得。版权所有（C）2009，JPO＆INPIT

4. 发明专利

JP2002011313A FILTER MATERIAL FOR AIR FILTER AND AIR FILTER UNIT USING THE SAME 失效
公开(公告)号：JP2002011313A
公开(公告)日：2002-01-15
申请号：JP2000194671
申请日：2000-06-28
申请人： NITTO DENKO CORP
发明人： MAEOKA TAKUYA
IPC分类号： B01D39/14 , B01D39/16
摘要： PROBLEM TO BE SOLVED: To provide a filter material for air filters which can simultaneously remove a gaseous component (especially a gaseous organic substance) and dust floating in the atmosphere. SOLUTION: A composite material comprising an adsorbent 6 sandwiched between at least two porous polytetrafluoroethylene (PTFE) films 1,2 bonded with an adhesive 5 is used. Preferably, the adhesive is arranged in a state of scattered dots between the porous PTFE films in an amount of 5 g/m2 or more but not more than 20 g/m2. A hot-melt powder is suitable as the adhesive 5. Active carbon is a satisfactory example of the adsorbent 6. An air-permeable supporting material 3, 4 may be used for reinforcing.

5. 发明专利

JPH11137931A AIR FILTER AND ITS PRODUCTION 失效
公开(公告)号：JPH11137931A
公开(公告)日：1999-05-25
申请号：JP11751798
申请日：1998-04-27
申请人： NITTO DENKO CORP
发明人： MAEOKA TAKUYA , NAHATA NORIKANE , ISHINO TOSHIAKI
IPC分类号： B01D39/00 , B01D39/16 , B01D46/10 , B01D67/00 , B01D69/10 , B01D71/36 , B32B5/24
摘要： PROBLEM TO BE SOLVED: To provide a PTFE porous membrane air filter material having excellent performance without any problems of degassing property. SOLUTION: This air filter is produced by heat-treating a nonwoven fabric- comprising a fiber containing more than one kind selected out of polyolefin and polyester as a main component or a nonwoven fabric complexing them at 80 to 130 deg.C for 5 to 20 min. and then, laminating the fabric with a PTFE porous membrane, or by laminating them and then, heat-treating them. In the quantitative analysis of a produced gas from this material through a gas chromatography, the whole amt. of the gas produced is

6. 发明专利

JPH1157377A ADSORBENT-ENCAPSULATING POROUS VESSEL 失效
公开(公告)号：JPH1157377A
公开(公告)日：1999-03-02
申请号：JP23069797
申请日：1997-08-27
申请人： NITTO DENKO CORP
发明人： NAHATA NORIKANE , ISHINO TOSHIAKI , MAEOKA TAKUYA , OTA KOJI
IPC分类号： B01D53/04 , B01J20/10 , B01J20/20
摘要： PROBLEM TO BE SOLVED: To provide an adsorbent-encapsulating porous vessel capable of avoiding the scattering of fine powder of an adsorbent to the outside environment and exhibiting excellent adsorption performance. SOLUTION: The adsorbent-encapsulating porous vessel is obtained by laminating 2 pieces of polytetrafluoroethylene porous sheets having >=5000 g/m /day moisture permeability, 0.1-0.15 μm particle diameter and >=99.999% collection efficiency of dust and sealing the end part of the sheets so as to wrap the adsorbent inserted between the sheets.

7. 发明专利

JP2007111697A Air filter medium 审中-公开
标题翻译：空气过滤器介质
公开(公告)号：JP2007111697A
公开(公告)日：2007-05-10
申请号：JP2006332508
申请日：2006-12-08
申请人： Nitto Denko Corp , 日東電工株式会社
发明人： NAHATA NORIKANE , KAWANO EIZO , MAEOKA TAKUYA
IPC分类号： B01D39/16 , B01D69/10 , B01D69/12 , B01D71/36
摘要： PROBLEM TO BE SOLVED: To provide an air filter medium where the seizing performance of polytetrafluoroethylene (PTFE) is not deteriorated even if processing such as pleating and bonding processing with gas permeable supports are performed thereon. SOLUTION: In a laminate 2 containing at least three-layered PTFE porous film, the pressure drop of an outermost layer PTFE porous film 4 is designed to be less than half of that of at least one intermediate layer PTFE porous film 5. The air filter medium 1 is obtained by bonding the gas-permeable supports 3 to both the outermost layers of the laminate 2. The pressure drop of a first polytetrafluoroethylene porous film is 2 to 15 mm H 2 O, the pressure drop of a second polytetrafluoroethylene porous film is 10 to 30 mm H 2 O, and the PF value of the air filter medium is 17 or more. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种空气过滤介质，其中即使在其上进行用透气性支撑体进行打褶和接合处理等处理也不会降低聚四氟乙烯（PTFE）的抓住性能。解决方案：在含有至少三层PTFE多孔膜的层压体2中，最外层PTFE多孔膜4的压降被设计为小于至少一个中间层PTFE多孔膜5的压降的一半。空气过滤介质1通过将透气性支撑体3粘合到层压体2的最外层而获得。第一聚四氟乙烯多孔膜的压降为2〜15mm H 2 SBB，第二聚四氟乙烯多孔膜的压降为10〜30mm H 2 SBB，空气过滤介质的PF值为17以上。版权所有（C）2007，JPO＆INPIT

8. 发明专利

JP2004261737A Air filter medium 审中-公开
公开(公告)号：JP2004261737A
公开(公告)日：2004-09-24
申请号：JP2003055864
申请日：2003-03-03
申请人： Nitto Denko Corp , 日東電工株式会社
发明人： KAWANO EIZO , MAEOKA TAKUYA
IPC分类号： B01D71/36 , B01D39/16 , B32B5/24 , B32B27/30
摘要： PROBLEM TO BE SOLVED: To provide an air filter medium the upstream side and the down stream side of which can be easily discriminated from each other and which is free from a sense of bad hygiene due to collected dust.
SOLUTION: The air filter medium comprises at least one porous membrane layer of polytetrafluoroethylene and at least one gas-permeable fiber material layer 2a, 2b and 3, and at least one of the two layers disposed as the outermost layer is colored. A face of the filtering material to be disposed to the upstream side (downstream side) can be easily discriminated even if the structure in the cross-sectional direction is asymmetric.
COPYRIGHT: (C)2004,JPO&NCIPI

9. 发明专利

JP2002370009A Suction filter medium for turbine and use method therefor 审中-公开
标题翻译：用于涡轮机的吸入式过滤介质及其使用方法
公开(公告)号：JP2002370009A
公开(公告)日：2002-12-24
申请号：JP2001179026
申请日：2001-06-13
申请人： Nitto Denko Corp , 日東電工株式会社
发明人： KAWANO EIZO , MAEOKA TAKUYA
IPC分类号： F01D25/00 , B01D39/16 , B01D69/10 , B01D71/36 , D06M17/00 , F02C7/055
摘要： PROBLEM TO BE SOLVED: To provide a suction filter medium for a turbine which is held to a clean state generating no contamination in the turbine and suppressed from a rise in pressure loss.
SOLUTION: The suction filter medium for the turbine includes a polytetrafluoroethylene porous film and an air permeable support material and the fiber diameter of at least one layer of the air permeable support material is 0.2-15 μm. The filter medium is used so that the air permeable support material is arranged on the upstream side of the polytetrafluoroethylene porous film with respect to air streams passing through the filter medium toward the turbine.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供一种保持在清洁状态的涡轮机的吸入过滤介质，其不产生涡轮机中的污染并且抑制了压力损失的上升。解决方案：用于涡轮机的吸滤器包括聚四氟乙烯多孔膜和透气支撑材料，至少一层透气支撑材料的纤维直径为0.2-15μm。使用过滤介质，使得透气性支撑材料相对于通过过滤介质的气流朝向涡轮机布置在聚四氟乙烯多孔膜的上游侧。

10. 发明专利

JP2002346319A SUCTION FILTER MEDIUM FOR TURBINE 失效
公开(公告)号：JP2002346319A
公开(公告)日：2002-12-03
申请号：JP2001151494
申请日：2001-05-21
申请人： NITTO DENKO CORP
发明人： MAEOKA TAKUYA , KAWANO EIZO
IPC分类号： F02C7/052 , B01D39/16 , B01D69/12 , B01D71/36
摘要： PROBLEM TO BE SOLVED: To provide a suction filter medium for a turbine not contaminating the interior of the turbine, having high particle collection efficiency, low in pressure loss and capable of being regenerated while suppressing the deterioration of capacity caused by washing. SOLUTION: The suction filter medium for the turbine contains a polytetrafluoroethylene porous film and an air permeable support material and is characterized in that pressure loss is 100-300 Pa and a PF value is not less than 15. The pressure loss of the polytetrafluoroethylene porous film is preferably set to 70-250 Pa and the PF value thereof is preferably set to 18 or more.

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