The invention discloses a shading
polypropylene base film for
photographic paper and a preparation method of the shading
polypropylene base film. The shading
polypropylene base film for the
photographic paper is characterized in that the shading polypropylene base film for the
photographic paper is formed by sequentially compounding a surface polypropylene composition layer, a core polypropylene composition layer and a surface polypropylene composition layer, the
surface layer polypropylene composition is prepared by mixing, melting and extruding polypropylene resin, an
antistatic agent and a dispersing agent; the core layer polypropylene composition is prepared by mixing, melting and extruding polypropylene resin, filler, a
coupling agent, an
antioxidant,
carbon black and a dispersing agent; and respectively putting the core layer polypropylene composition and the
surface layer polypropylene composition into a main
machine and an auxiliary
machine of three-layer co-
extrusion casting extrusion equipment, and carrying out
melt extrusion, cooling shaping and the like to obtain the shading polypropylene base film for the photographic paper. The shading polypropylene base film for photographic paper has the characteristics of good shading performance, low
water vapor transmittance, excellent surface glossiness,
high surface energy, excellent antistatic performance and the like, and is suitable for the fields of ink-jet printing, inkjet films and the like.