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1. 发明专利

JP5351476B2 Method for producing a porous film 有权
公开(公告)号：JP5351476B2
公开(公告)日：2013-11-27
申请号：JP2008239299
申请日：2008-09-18
申请人：富士フイルム株式会社
发明人：晃寿伊藤 , 司石原 , 英数山崎
IPC分类号： C08J9/00
CPC分类号： B05D3/105 , B05D1/40 , B05D5/02 , Y10T137/6851
摘要： A coating liquid containing a polymer and a hydrophobic solvent is applied to a support to form a coating layer. In a humidifying process with high humidity, the coating layer is set under an atmosphere having a first dew point higher than a surface temperature of the coating layer. Then, in a humidifying process with low humidity, the coating layer is set under an atmosphere having a second dew point higher than the surface temperature of the coating layer and lower than the first dew point. Thereby, water vapor is condensed from ambient air on the coating layer to generate minuscule water drops. Thereafter, the coating layer is dried to form a porous film having plural pores made by the minuscule water drops as a template. Since the humidifying process with high humidity is performed for a short period of time and then the humidifying process with low humidity is performed, the minuscule water drops are prevented from growing up, to obtain a porous film having minute pores.

2. 发明专利

JP5238323B2 Porous film 有权
公开(公告)号：JP5238323B2
公开(公告)日：2013-07-17
申请号：JP2008088794
申请日：2008-03-28
申请人：富士フイルム株式会社
发明人：英数山崎 , 司石原
IPC分类号： C08J9/28 , C12N5/07
CPC分类号： C12M25/02

3. 发明专利

JP5405175B2 Method for producing a porous film 有权
公开(公告)号：JP5405175B2
公开(公告)日：2014-02-05
申请号：JP2009086165
申请日：2009-03-31
申请人：富士フイルム株式会社
发明人：司石原 , 晃寿伊藤 , 英数山崎
IPC分类号： C08J9/28

4. 发明专利

JP5351477B2 Method for producing a porous film 有权
公开(公告)号：JP5351477B2
公开(公告)日：2013-11-27
申请号：JP2008239719
申请日：2008-09-18
申请人：富士フイルム株式会社
发明人：晃寿伊藤 , 英数山崎 , 司石原
IPC分类号： C08J9/28 , B29C41/24 , B29K105/04 , B29L7/00
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a porous film, for efficiently producing the porous film having fine pores in a range of 5 to 100 μm. SOLUTION: The method for producing the porous film 10 includes: a process for coating a support 12 with a coating liquid 35 by a coating die 51 to form a coating film 35a; the first humidification treatment process for leaving the coating film 35a in the first zone 61 in an atmosphere having the first dew point Td1 higher than the surface temperature Ts of the coating film 35a, shortening the first humidification treatment time to sparely form primary fine water drops 60a by dew condensation; the second humidification treatment process for leaving the coating film 35a in an atmosphere having the second dew point Td2 which is higher than the first dew point Td1 to quickly grow the primary fine water drops 60a into secondary fine water drop 60b; and a drying process for drying the coating film 35a to form a plurality of pores with the secondary fine water drops 60b as templates, thus forming the porous film 10. Thus, the porous film 10 is obtained having larger size fine pores than those of conventional porous films. COPYRIGHT: (C)2010,JPO&INPIT

5. 发明专利

JP5349179B2 Method for producing a porous body 有权
公开(公告)号：JP5349179B2
公开(公告)日：2013-11-20
申请号：JP2009162900
申请日：2009-07-09
申请人：富士フイルム株式会社
发明人：司石原 , 晃寿伊藤 , 英数山崎
IPC分类号： C08J9/28 , B29C41/28 , B29L7/00
摘要： PROBLEM TO BE SOLVED: To produce a porous film in which holes formed in the surface have a desired size and a desired forming density. SOLUTION: A solution 21 is stored in a liquid tank 50. A polymer film 45 is immersed in the solution 21 in the liquid tank 50. Wet air 400 is blown to a liquid surface 64 of the solution 21 in the liquid tank 50. Water droplets 406 are formed on a liquid surface 64 of the solution 21 by contact of the liquid surface with a wet air 400. The droplets 406 on the liquid surface 64 are made grown to be objective size by contact of the liquid surface with the wet air 400. When the polymer film 45 is drawn out of the solution 21 via the liquid surface on which the droplets 406 are present that are grown to a target size, a film 22 is formed on the surface 45a of the polymer film 45 and then water droplets 406 on the liquid surface 64 are gathered on the surface 22a of the film 22. The film 22 is blown by dried air, the solvent and the water droplets are evaporated, so that a porous film using water droplets as a mold is obtained. COPYRIGHT: (C)2010,JPO&INPIT

6. 发明专利

JP5279315B2 Method for producing a porous film 有权
公开(公告)号：JP5279315B2
公开(公告)日：2013-09-04
申请号：JP2008090291
申请日：2008-03-31
申请人：富士フイルム株式会社
发明人：晃寿伊藤 , 英数山崎 , 司石原
IPC分类号： C08J9/28 , B05D1/18
摘要： PROBLEM TO BE SOLVED: To easily produce a porous film provided with porous layers having minute apertures on both the sides. SOLUTION: In a first chamber 35, an application liquid 20 is applied to both the sides of a support 11 by a dip coater 40. The application liquid 20 on the back face side is wiped off by a blade 44, and the thickness of the first application film 46 on the front face side and that of the second application film 47 on the back face side are differentiated from each other. By air suction units 51 and 52 in a second chamber 36, dew condensation occurs on the respective application films 46 and 47. Minute water droplets are grown in a third chamber 37. When the water droplets are dried in a fourth chamber 38, the porous film 10 having apertures on both the sides is formed. The porous film 10 having the porous layers on both the sides can be produced easily. COPYRIGHT: (C)2010,JPO&INPIT

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