METHOD OF MOLDING WASTE PLASTIC AND METHOD OF PYROLYZING WASTE PLASTIC

Title:

METHOD OF MOLDING WASTE PLASTIC AND METHOD OF PYROLYZING WASTE PLASTIC

Document Type and Number:

WIPO Patent Application WO/2007/125626

Kind Code:

A1

Abstract:

A waste plastic is molded to produce high-density granules. The granules are mixed with coal and the mixture is pyrolyzed in a coke oven to produce a high-strength coke. The waste plastic to be used as a raw material may be one comprising polyethylene, polypropylene, and polystyrene, which are plastics softening at a low temperature, in a total proportion of 50% or higher. This waste plastic is molded by a molding method in which the waste plastic is treated with a screw extruder and extruded from a nozzle. In the method, the waste plastic in the extruder is heated to a temperature of 180-260°C and gases in the extruder are sucked. By this operation, the polyethylene, polypropylene, and polystyrene are brought into a molten state and gases contained in the plastic are diminished. The plastic in this state is extruded from a nozzle having a diameter of 15-60 mm to thereby compression-mold it. Thereafter, the extrudate is cut and is cooled with a water cooler within three seconds after the cutting.

Inventors:

IBARAKI, Tetsuharu (1 Kimitsu, Kimitsu-sh, Chiba 41, 2991141, JP)
茨城哲治 (〒41 千葉県君津市君津１番地新日本製鐵株式会社君津製鐵所内 Chiba, 2991141, JP)
KOSEKI, Tsuneo (1 Kimitsu, Kimitsu-sh, Chiba 41, 2991141, JP)
小関常雄 (〒41 千葉県君津市君津１番地新日本製鐵株式会社君津製鐵所内 Chiba, 2991141, JP)
TOODA, Yuuji (1 Kimitsu, Kimitsu-sh, Chiba 41, 2991141, JP)
遠田祐治 (〒41 千葉県君津市君津１番地新日本製鐵株式会社君津製鐵所内 Chiba, 2991141, JP)
HIROMATSU, Takashi (1 Kimitsu, Kimitsu-sh, Chiba 41, 2991141, JP)
廣松隆 (〒41 千葉県君津市君津１番地新日本製鐵株式会社君津製鐵所内 Chiba, 2991141, JP)

Application Number:

JP2006/323041

Publication Date:

November 08, 2007

Filing Date:

November 13, 2006

Export Citation:

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Assignee:

NIPPON STEEL CORPORATION (6-3 Otemachi 2-chome, Chiyoda-ku Tokyo, 71, 1008071, JP)
新日本製鐵株式会社 (〒71 東京都千代田区大手町二丁目６番３号 Tokyo, 1008071, JP)
IBARAKI, Tetsuharu (1 Kimitsu, Kimitsu-sh, Chiba 41, 2991141, JP)
茨城哲治 (〒41 千葉県君津市君津１番地新日本製鐵株式会社君津製鐵所内 Chiba, 2991141, JP)
KOSEKI, Tsuneo (1 Kimitsu, Kimitsu-sh, Chiba 41, 2991141, JP)
小関常雄 (〒41 千葉県君津市君津１番地新日本製鐵株式会社君津製鐵所内 Chiba, 2991141, JP)
TOODA, Yuuji (1 Kimitsu, Kimitsu-sh, Chiba 41, 2991141, JP)
遠田祐治 (〒41 千葉県君津市君津１番地新日本製鐵株式会社君津製鐵所内 Chiba, 2991141, JP)
HIROMATSU, Takashi (1 Kimitsu, Kimitsu-sh, Chiba 41, 2991141, JP)

International Classes:

B29B9/10; B29B9/06; B29B17/00; C08J11/12; C10B53/07; C10B57/04; C10L5/48

Foreign References:

JP2005111847A	2005-04-28
JPH09170009A	1997-06-30
JP2001232634A	2001-08-28
JPH11192469A	1999-07-21
JP2000117732A	2000-04-25
JP2003200422A	2003-07-15
JP2006063346A	2006-03-09
JP2002284888A	2002-10-03
JP2001049261A	2001-02-20
JPH0577301A	1993-03-30

Other References: