Abstract: Process for preparing a transparent polypropylene film having good slip and non-blocking properties which comprises admixing polypropylene with a thermoplastic resin in the melt state, the thermoplastic resin having a melting point higher than but no more than 100.degree. C higher than the melting point of the polypropylene and being substantially incompatible with the polypropylene under the mixation condition, to give a polypropylene composition where the thermoplastic resin is dispersed in the form of fine particles of 0.1 to 10 .mu. in average particle size and the amount of the dispersing thermoplastic resin is from 0.01 to 1% by weight of the polypropylene, extruding the resultant composition in the melt state into a film and stretching the film in at least one direction.

Abstract: A film of excellent cutting property in the transverse direction which comprises a mixture of polypropylene and at least one ethylene polymer and satisfying the following requirements:1. Ny - Nx = 6 .times. 10.sup.-3 .about. 25 .times. 10.sup.-3 :Wherein Nx in the refractive index in the machine direction andNy is the refractive index in the transverse direction;2. (Nx + Ny) .times. 0.5 - Nz .ltoreq. 0.012:Wherein Nz is the refractive index in the vertical direction and Nx and Ny are each as defined above;3. break elongation in the machine direction = 150 .about. 800%; and4. no substantial necking is seen on the surface thereof.

Abstract: A film of excellent cutting property in the transverse direction which comprises a mixture of polypropylene and at least one ethylene polymer and satisfying the following requirements:1. Ny - Nx = 6 .times. 10.sup.-.sup.3 .about. 25 .times. 10.sup.-.sup.3Wherein Nx is the refractive index in the machine direction and Ny is the refractive index in the transverse direction;2. (Nx + Ny) .times. 0.5 - Nz .ltoreq. 0.012Wherein Nz is the refractive index in the vertical direction and Nx and Ny are each as defined above;3. break elongation in the machine direction = 150 .about. 800 %; and4. no substantial necking is seen on the surface thereof.