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Title:
ELECTRET-CONVERTED FILM
Document Type and Number:
Japanese Patent JP2010089494
Kind Code:
A
Abstract:

To provide an electret-converted film (ii) which can stably maintain a high-charged state over a long period of time by using a porous resin film (i) having high insulation resistance and adding charge therein.

The electret-converted film (ii) is formed by piling up surface layers (B) 3 and 4 made of a stretched resin film on at least one side of a core layer (A) 2 made of a biaxially oriented resin film having holes. The porous resin film (i) having a steam permeation coefficient of 0.1-2.5 g mm/m2 24 hr and a surface resistance value of at least one surface of 11013-91017 is subjected to direct current high voltage discharge treatment to be converted into an electret.


Inventors:
Koike, Hiroshi
Iida, Seiichiro
Application Number:
JP2009000200196
Publication Date:
April 22, 2010
Filing Date:
August 31, 2009
Export Citation:
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Assignee:
YUPO CORP
International Classes:
B32B5/18; B29C55/04; B29C71/04; B32B7/02; C08K3/00; C08L23/02; C08L101/00; H01G7/02; H01L41/08; H01L41/09; H01L41/193; H01L41/22; H01L41/257; H01L41/26; H01L41/45; B29K23/00; B29L7/00; B29L9/00; B29L31/34
Domestic Patent References:
JP2011086924A2011-04-28
JPH05253415A1993-10-05
JPS62198111A1987-09-01
JP2003510116A2003-03-18
JP2011086924A2011-04-28
JPH05253415A1993-10-05
JPS62198111A1987-09-01
Foreign References:
Other References:
JPN6010062387; HILLENBRAND J, et al.: 'Electret properties of biaxially stretched polypropylene films containing various additives' Journal of Physics D: Applied Physics Vol.39, No.3, 2006, Pages 535-540
JPN6010062388; BEHRENDT N, et al.: 'Charge Storage Behavior of Isotropic and Biaxially-Oriented Polypropylene Films Containing alpha- and' Journal of Applied Polymer Science Vol.99, No.3, 2006, Pages 650-658
JPN6010062386; BEHRENDT N, et al.: 'Development of Porous Polypropylene Blends with NA11 Particles and Glass Hollow Spheres by Biaxial S' IEEE Transactions on Dielectrics and Electrical Insulation Vol.13, No.5, 200610, Pages 992-1000
JPN6010062387; HILLENBRAND J, et al.: 'Electret properties of biaxially stretched polypropylene films containing various additives' Journal of Physics D: Applied Physics Vol.39, No.3, 2006, Pages 535-540
JPN6010062388; BEHRENDT N, et al.: 'Charge Storage Behavior of Isotropic and Biaxially-Oriented Polypropylene Films Containing alpha- and' Journal of Applied Polymer Science Vol.99, No.3, 2006, Pages 650-658
Attorney, Agent or Firm:
武井 英夫
鳴井 義夫
松井 佳章