Title:
MULTI-LAYER RESIN FILM, METAL PLATE COATED WITH RESIN, METHOD FOR PRODUCING MULTI-LAYER RESIN FILM, AND METHOD FOR PRODUCING METAL SHEET COATED WITH RESIN
Document Type and Number:
WIPO Patent Application WO/2005/046989
Kind Code:
A1
Abstract:
A method for producing a multi-layer resin film, wherein a plurality of molten resins being different in the melt viscosity are laminated on the surface of a film containing at least one resin containing a coloring component without formation of irregularities; and a method for producing a metal sheet having a resin coating film which comprises laminating said film on a metal sheet. The above method for producing a multi-layer resin film comprises keeping the temperatures of an extruder, a manifold and a dye portion adjacent to the manifold for the pass of a resin having a higher melt viscosity at a level higher than those of the temperatures of an extruder, a manifold and a dye portion adjacent to the manifold for the pass of a resin having a lower melt viscosity, to thereby reduce the difference in the melt viscosities of adjacent resin layers to 3000 poise or less at a shear rate of 20 to 500 sec-1, and laminating respective molten resins while adjusting a resin containing a coloring component so as to have 0.5g ≤ Tm ≤ 1.0 g, wherein Tm represents a melt strength, and a thickness of one half of the total thickness or more or having Tm ≥ 1.0 g and a thickness of one third of the total thickness or more, to thereby form a multi-layer film.
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Inventors:
MATSUBARA YASUHIRO (JP)
MAIDA NORIMASA (JP)
NAKAMURA TAKUJI (JP)
INAZAWA HIROSHI (JP)
KOJO HARUNORI (JP)
MAIDA NORIMASA (JP)
NAKAMURA TAKUJI (JP)
INAZAWA HIROSHI (JP)
KOJO HARUNORI (JP)
Application Number:
PCT/JP2004/012087
Publication Date:
May 26, 2005
Filing Date:
August 24, 2004
Export Citation:
Assignee:
TOYO KOHAN CO LTD (JP)
MATSUBARA YASUHIRO (JP)
MAIDA NORIMASA (JP)
NAKAMURA TAKUJI (JP)
INAZAWA HIROSHI (JP)
KOJO HARUNORI (JP)
MATSUBARA YASUHIRO (JP)
MAIDA NORIMASA (JP)
NAKAMURA TAKUJI (JP)
INAZAWA HIROSHI (JP)
KOJO HARUNORI (JP)
International Classes:
B32B27/20; B29C48/08; B29C48/305; B29C48/92; B32B15/08; B32B27/08; B29K101/12; B29L7/00; B29L9/00; (IPC1-7): B32B27/20
Foreign References:
| JP2001253033A | 2001-09-18 | |||
| JPH11309770A | 1999-11-09 | |||
| JP2000071388A | 2000-03-07 | |||
| JPH1086308A | 1998-04-07 | |||
| JP2004299390A | 2004-10-28 |
Other References:
SAWADA K. ET AL.: "PLastic oshisashi seikei no saishin gijutsu", KABUSHIKI KAISHA RABA DAIJESUTO SHA HAKKO, vol. 1, 25 June 1993 (1993-06-25), pages 121 - 124, XP002989343
See also references of EP 1690677A4
See also references of EP 1690677A4
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