Title:
POLYPROPYLENE RESIN FILM
Document Type and Number:
Japanese Patent JPH0820093
Kind Code:
A
Abstract:
PURPOSE: To provide a polypropylene resin film having uniform thickness, transparency corresponding to that of a film molded by a conventional T-die cast molding method and excellent impact strength.
CONSTITUTION: A polypropylene resin film is molded by a three-layer co- extrusion air cooling inflation method and has a center layer mainly composed of a polypropylene resin (A) and an outer layer mainly composed of a polypropylene resin (B). The wt. average mol.wt. of the polypropylene resins (A), (B) is within a range of 80,000-400,000 and the elution amt. at specific temp. thereof due to a cross fractionation method is within a specific range of a total polypropylene amt.
Inventors:
TAKEUCHI YOSHIO
TANIGUCHI NOBUO
WATANABE YOSHINORI
TANIGUCHI NOBUO
WATANABE YOSHINORI
Application Number:
JP15712994A
Publication Date:
January 23, 1996
Filing Date:
July 08, 1994
Export Citation:
Assignee:
SEKISUI CHEMICAL CO LTD
International Classes:
B32B27/32; B29C55/28; C08L23/00; C08L23/10; B29K23/00; B29L9/00; (IPC1-7): B32B27/32; B29C55/28