| 摘要 |
PROBLEM TO BE SOLVED: To efficiently demonstrate the antibacterial effect and manufacture a polypropylene film of superior transparency for controlling the separation of an antibacterial agent by laminating a layer composed mainly of polypropylene containing a specified amount of an inorganic antibacterial agent on at least one surface layer of a base layer. SOLUTION: This polypropylene film is constituted of layer A/layer B or layer B/layer A/layer B, and the layer A as a base is composed of polypropylene resin, while the layer B as a surface layer is formed by a resin composed mainly of polypropylene to which an inorganic antibacterial agent is added. The film is preferably successive biaxially oriented or simultaneous biaxially oriented. The inorganic antibacterial agent is prepared by carrying a metal complex such as silver as its representative or the like, or zeolite or porous silica, and the antibacterial effect is demonstrated by ionized and oozed metallic ions. The layer B composed mainly of polypropylene containing the inorganic antibacterial agent of 0.5-10wt.% is laminated at least on one surface layer. |
