Title:
【発明の名称】多層プラスチック燃料タンクの製造方法
Document Type and Number:
Japanese Patent JP2866710
Kind Code:
B2
Abstract:
PURPOSE:To make it possible to manufacture fuel tank, which is excellent in impact resistance and has high density polyethylene layer having the composition, which is prepared by finely and favorably dispersing polyamide in high density polyethylene, by a method wherein the high density polyethylene and flash and the like of multi-layer plastic fuel tank for reworking are kneaded with and extruder having a screw with specified structure. CONSTITUTION:The mixing ratio of reworked material (which is obtained from some part or the whole of multi-layer plastic fuel tank) to high density polyethylene is normally 20 - 200 pts. wt. of reworked material added to 100 pts. wt. of high density polyethylene. An extruder kneads said mixture at the feed zone 22 of a screw 21 and meters it at the metering zone 23. Further, the extruder performs the lateral mixing of resin flow, which tends to be insufficient at said respective zones, at a cross saw zone 24. In succession, the extruder performs the melting of unmolten resin at the high shearing zone 25. After that, the extruder delivers the resin by mixing longitudinally and laterally. Normally, the length of the screw 21 is set to be length/diameter ratio (L/D) of 20 or more. If L/D is below 20, enough kneading can not be performed.
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Inventors:
TAKADO YUTAKA
NAKAZATO TOSHIKAZU
NOGATA TETSURO
YOKOI TOSHIO
TEZUKA EIJI
NAKAZATO TOSHIKAZU
NOGATA TETSURO
YOKOI TOSHIO
TEZUKA EIJI
Application Number:
JP15705590A
Publication Date:
March 08, 1999
Filing Date:
June 15, 1990
Export Citation:
Assignee:
TONEN KAGAKU KK
TOYOTA JIDOSHA KK
TOYOTA JIDOSHA KK
International Classes:
B32B27/32; B29C48/525; B29C49/04; B29D22/00; B32B1/02; B29K23/00; B29K77/00; B29L9/00; (IPC1-7): B29C47/04; B29C47/60; B29C49/04
Domestic Patent References:
| JP431010A | ||||
| JP63122513A | ||||
| JP61144325A |
Attorney, Agent or Firm:
Takaishi Tachibana