POLYPROPYLENE FILM AND ITS MANUFACTURE

摘要

PROBLEM TO BE SOLVED: To form a film having excellent antistatic properties and moistureproofness by laminating a predetermined thickness of a low stereoregular polypropylene resin layer on one side surface of a base layer obtained by mixing a predetermined weight of one or more types of a petroleum resins free from polar group or a terpene resin with a predetermined weight of a high steroregular polypropylene. SOLUTION: A low steroregular polypropylene resin layer (B layer) having a mesopentad fraction of 70 to 90% is laminated at least one side surface of a base layer (A layer) obtained by mixing 5 to 30 wt.% of one or more types of a petroleum resin substantially free from polar group and/or a terpene resin substantially free from polar group with 70 to 95 wt.% of a high steroregular polypropylene having a mesopentad fraction of 98.0% or more. In this case, a thickness of the laminated layer per one layer of the B layer is 0.2μm or more and less than 1/3 of the thickness of the overall laminated film.