| 摘要 |
PURPOSE:To obtain film excellent in resistances to scratching and dubbing by a method wherein specified amount of inert particles having specified particle diameters are added to thermoplastic resin so as to laminate films, which mainly consist of said thermoplastic resins after being biaxially stretched and heat-treated, to each other in order to realize film having specified thickness. CONSTITUTION:Film A, which mainly consists of thermoplastic resin A containing at least two kinds of inert particles having different mean particle diameters, is laminated at least to one side of film B mainly consisting of thermoplastic resin B. In this case, 2 - 20 wt.% of the inert particle having the minimum means particle diameter d1 is added to the thermoplastic resin A. The lamination is performed so as to bring the ratio t/d1 into 0.1 - 5, in which (t) is the thickness of the film, which mainly consists of the thermoplastic resin A and has been subjected to biaxially stretching and heat- treating. In the case that the particle diameter ratio (or ratio of the major axis to the minor axis of the particle) of the inert particle, which is added to the thermoplastic resin A and has mean particle diameter different from the inert particle just mentioned above, is 1.0 - 1.3 and the relative standard deviation of the particle diameters is 0.6 or less, more favorable resistances to scratching and dubbing result. |
