PROCESS FOR PRODUCING POLYPROPYLENE FILM FOR PACKAGE

摘要

PURPOSE: Polypropylene film is provided which is excellent low temperature adhesion and high speed productivity useful as package film. CONSTITUTION: The process comprises the steps of: melt extrusion, forming and elongation of a resin composition having 1% to 10% by weight of α-olefin copolymer added to polypropylene resin with 1(g/10min) to 20(g/10min) of melt index and 140°C to 180°C of melting temperature; preparing an elongated polypropylene film; drying 0.001g/m¬2 to 0.1g/m¬2 of high molecular aqueous solution comprising 0.01% to 1% by weight of colloid alumina of 10nm to 50nm of particle diameter, 0.001% to 0.1% by weight of inorganic particle of 0.01 to 0.1micrometer, 0.1% to 3% by weight of water soluble polyester resin with sulfuric acid salt and 0.1% to 3% by weight of acrylic resin; and then being added aqueous solution to a side of the film. Thereby, the polyethylene film is improved to low temperature adhesion and high speed productivity so that the film is useful as the package film.