Title:
FILTER MEDIUM EQUIPPED WITH POROUS FILM, PROCESS FOR PRODUCING SAME, FILTER PACK, AND FILTER UNIT
Document Type and Number:
WIPO Patent Application WO/2011/158717
Kind Code:
A1
Abstract:
Provided is a filter medium equipped with a porous film, the filter medium having a high collection efficiency, low pressure loss, and high dust-holding capacity. The filter medium comprises a porous film constituted of polytetrafluoroethylene and having an average pore diameter of 2.5 µm or more and a porosity of 95% or more and a supporting material for supporting the porous film. The filter medium has a pressure loss less than 100 Pa when air is passed therethrough at a velocity of 5.3 cm/sec, a particle collection efficiency of 95% or more when air containing NaCl particles with a particle diameter of 0.3 µm is passed therethrough at a velocity of 5.3 cm/sec, and a value of PF, obtained by the equation PF={-log[(100-(collection efficiency, %))/100]/(pressure loss, Pa)}×1000, of 30 or more. When air containing poly-α-olein particles with a number-median diameter of 0.25 µm is continuously passed through the filter medium at a velocity of 5.3 cm/sec and the pressure loss reaches 300 Pa, then the amount of poly-α-olein dust particles held in the filter medium is 15 g/m2 or more.
Inventors:
INUI, Kunihiko (Yodogawa Plant, 1-1, Nishihitotsuya, Settsu-sh, Osaka 85, 〒5668585, JP)
乾 邦彦 (〒85 大阪府摂津市西一津屋１番１号 ダイキン工業株式会社 淀川製作所内 Osaka, 〒5668585, JP)
SHIBUYA, Yoshiyuki (Yuki Plant, 415, Oaza-Yukisaku, Yuki-sh, Ibaraki 46, 〒3070046, JP)
渋谷 吉之 (〒46 茨城県結城市大字結城作４１５ 日本無機株式会社 結城工場内 Ibaraki, 〒3070046, JP)
乾 邦彦 (〒85 大阪府摂津市西一津屋１番１号 ダイキン工業株式会社 淀川製作所内 Osaka, 〒5668585, JP)
SHIBUYA, Yoshiyuki (Yuki Plant, 415, Oaza-Yukisaku, Yuki-sh, Ibaraki 46, 〒3070046, JP)
渋谷 吉之 (〒46 茨城県結城市大字結城作４１５ 日本無機株式会社 結城工場内 Ibaraki, 〒3070046, JP)
Application Number:
JP2011/063152
Publication Date:
December 22, 2011
Filing Date:
June 08, 2011
Export Citation:
Assignee:
DAIKIN INDUSTRIES, LTD. (Umeda Center Building, 4-12 Nakazaki-Nishi 2-Chome, Kita-ku, Osaka-sh, Osaka 23, 〒5308323, JP)
ダイキン工業株式会社 (〒23 大阪府大阪市北区中崎西２丁目４番１２号梅田センタービル Osaka, 〒5308323, JP)
INUI, Kunihiko (Yodogawa Plant, 1-1, Nishihitotsuya, Settsu-sh, Osaka 85, 〒5668585, JP)
乾 邦彦 (〒85 大阪府摂津市西一津屋１番１号 ダイキン工業株式会社 淀川製作所内 Osaka, 〒5668585, JP)
SHIBUYA, Yoshiyuki (Yuki Plant, 415, Oaza-Yukisaku, Yuki-sh, Ibaraki 46, 〒3070046, JP)
ダイキン工業株式会社 (〒23 大阪府大阪市北区中崎西２丁目４番１２号梅田センタービル Osaka, 〒5308323, JP)
INUI, Kunihiko (Yodogawa Plant, 1-1, Nishihitotsuya, Settsu-sh, Osaka 85, 〒5668585, JP)
乾 邦彦 (〒85 大阪府摂津市西一津屋１番１号 ダイキン工業株式会社 淀川製作所内 Osaka, 〒5668585, JP)
SHIBUYA, Yoshiyuki (Yuki Plant, 415, Oaza-Yukisaku, Yuki-sh, Ibaraki 46, 〒3070046, JP)
International Classes:
B01D39/16; B01D46/52
Attorney, Agent or Firm:
SHINJYU GLOBAL IP (South Forest Bldg, 1-4-19 Minamimori-machi,Kita-ku, Osaka-shi, Osaka 54, 〒5300054, JP)
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