Title:
METHOD FOR PRODUCING TRANSPARENT POLYPROPYLENE BASED SHEET AND TRANSPARENT POLYPROPYLENE BASED SHEET
Document Type and Number:
WIPO Patent Application WO/2005/092593
Kind Code:
A1
Abstract:
Provided are a transparent polypropylene based sheet which exhibits good tensile properties, impact resistance and rigidity, while retaining transparency, and also exhibits good characteristics as a transparent sheet such as the reduced whitening in the bending thereof, and further can be free from the generation of a gum-like material during forming, and thus can be produced continuously; a method for producing the transparent polypropylene based sheet; and an apparatus (1) for producing the transparent polypropylene based sheet, which comprises an extruding means (11) for melting and kneading a material followed by extruding the kneaded material into a sheet form, a first cooling means (12) for cooling a molten resin composition (20a) in a sheet form into a sheet (20) (a sheet-like article), a preheating means (13) for reheating the sheet (20), a heat treatment means (14) for heat-treating a resin composition (20a) in a sheet form, and a second cooling means (15) for cooling the seat (20) after heat treatment. The raw material for the sheet (21) produced by the above apparatus comprises a polypropylene resin (a) and a metallocene type ethylene-&agr -olefin copolymer (b).
Inventors:
FUNAKI AKIRA (JP)
AKAMATSU MASAHIRO (JP)
YAMAGUCHI SHIGEKI (JP)
MORI KENICHI (JP)
KITAJIMA TOMOYUKI (JP)
AKAMATSU MASAHIRO (JP)
YAMAGUCHI SHIGEKI (JP)
MORI KENICHI (JP)
KITAJIMA TOMOYUKI (JP)
Application Number:
PCT/JP2005/005406
Publication Date:
October 06, 2005
Filing Date:
March 24, 2005
Export Citation:
Assignee:
IDEMITSU UNITECH CO LTD (JP)
FUNAKI AKIRA (JP)
AKAMATSU MASAHIRO (JP)
YAMAGUCHI SHIGEKI (JP)
MORI KENICHI (JP)
KITAJIMA TOMOYUKI (JP)
FUNAKI AKIRA (JP)
AKAMATSU MASAHIRO (JP)
YAMAGUCHI SHIGEKI (JP)
MORI KENICHI (JP)
KITAJIMA TOMOYUKI (JP)
International Classes:
B29C48/07; B29C48/08; B29C48/305; B29C48/91; B29C71/02; C08J5/18; C08J7/00; C08L23/10; C08L23/12; C08L23/08; (IPC1-7): B29C47/14; B29C47/08; B29C47/88; C08J7/00; C08L23/12
Foreign References:
| JP2003170485A | 2003-06-17 | |||
| JPH11156921A | 1999-06-15 | |||
| JP6081698B2 | 2017-02-15 | |||
| JP6081796B2 | 2017-02-15 | |||
| JPH01306448A | 1989-12-11 | |||
| JPH0929818A | 1997-02-04 | |||
| JPS5825341A | 1983-02-15 |
Attorney, Agent or Firm:
Kinoshita, Jitsuzo (Ogikubo TM building 26-13, Ogikubo 5-chom, Suginami-ku Tokyo 51, JP)
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