Title:
METHOD OF SEPARATING MIXED PLASTIC
Document Type and Number:
WIPO Patent Application WO/2008/004600
Kind Code:
A1
Abstract:
A method for separating and recovering a high-purity polyester ingredient in
a high recovery from polyethylene terephthalate bottle wastes constituted
of polyethylene and/or polypropylene, polystyrene, and polyester. The wastes
can be continuously treated in large quantities. The method for separating
waste plastics is characterized in that plastics crushed are mixed with water
to prepare an aqueous slurry thereof beforehand and the aqueous slurry is supplied
to a cylindrical tank at a rate in a certain range so as to result in a rotational
flow and so that the water level ascends at a rate in a certain range, and that a polyester
having a high specific gravity is recovered as a sedimentation ingredient sedimenting
in the cylindrical tank, while a plastic having a low specific gravity is recovered
as an overflow ingredient through an upper part of the cylindrical tank.
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Inventors:
TOIDA, Kozo (77 Kitayoshida-cho, Matsuyama-sh, Ehime 41, 7918041, JP)
樋田幸三 (〒41 愛媛県松山市北吉田町７７番地帝人ファイバー株式会社 松山事業所内 Ehime, 7918041, JP)
MIZUNO, Kazumasa (77 Kitayoshida-cho, Matsuyama-sh, Ehime 41, 7918041, JP)
水野和正 (〒41 愛媛県松山市北吉田町７７番地帝人ファイバー株式会社 松山事業所内 Ehime, 7918041, JP)
樋田幸三 (〒41 愛媛県松山市北吉田町７７番地帝人ファイバー株式会社 松山事業所内 Ehime, 7918041, JP)
MIZUNO, Kazumasa (77 Kitayoshida-cho, Matsuyama-sh, Ehime 41, 7918041, JP)
水野和正 (〒41 愛媛県松山市北吉田町７７番地帝人ファイバー株式会社 松山事業所内 Ehime, 7918041, JP)
Application Number:
JP2007/063408
Publication Date:
January 10, 2008
Filing Date:
June 28, 2007
Export Citation:
Assignee:
TEIJIN FIBERS LIMITED (6-7 Minamihommachi 1-chome, Chuo-ku Osaka-sh, Osaka 54, 5410054, JP)
帝人ファイバー株式会社 (〒54 大阪府大阪市中央区南本町一丁目6番7号 Osaka, 5410054, JP)
TOIDA, Kozo (77 Kitayoshida-cho, Matsuyama-sh, Ehime 41, 7918041, JP)
樋田幸三 (〒41 愛媛県松山市北吉田町７７番地帝人ファイバー株式会社 松山事業所内 Ehime, 7918041, JP)
MIZUNO, Kazumasa (77 Kitayoshida-cho, Matsuyama-sh, Ehime 41, 7918041, JP)
帝人ファイバー株式会社 (〒54 大阪府大阪市中央区南本町一丁目6番7号 Osaka, 5410054, JP)
TOIDA, Kozo (77 Kitayoshida-cho, Matsuyama-sh, Ehime 41, 7918041, JP)
樋田幸三 (〒41 愛媛県松山市北吉田町７７番地帝人ファイバー株式会社 松山事業所内 Ehime, 7918041, JP)
MIZUNO, Kazumasa (77 Kitayoshida-cho, Matsuyama-sh, Ehime 41, 7918041, JP)
International Classes:
B29B17/00; B03B5/28; B29B17/00; B03B5/28
Attorney, Agent or Firm:
MIHARA, Hideko (Property Center Limited1-1, Uchisaiwaicho 2-chome,Chiyoda-k, Tokyo 11, 1000011, JP)
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