The invention provides an antibacterial anti-slip biaxially stretched
polyester film and a preparation method thereof. The film comprises a
surface layer and a core layer, wherein the
surface layer Ais a functional layer, the core layer B is a
colored layer and / or a transparent layer, the
mass fraction of the
surface layer is 15%-25%, the
mass fraction of the core layer is 75%-85%, and an
antibacterial agent is added in the surface layer A and / or the core layer B. When the film is prepared, in a transverse stretching process, the
shrinkage rate of the winding film is further reduced through an improved cross-drawing process, so that the product has a more excellent
shrinkage rate while having a good antibacterial anti-slip effect. The film is prepared by adopting three-layer co-extrusionbiaxial stretching equipment, and the
polyester film is obtained through the steps of
melt extrusion through a twin-screw extruder, piece
casting through
cold blast, longitudinal stretching, transverse stretching, traction and winding,
cutting, packaging, finishing and the like. The produced film has an excellent
antibacterial effect, has an anti-slip
friction coefficient of 0.75-0.85, and has very good anti-slip performance. In addition, the
polyester film prepared by the method has the advantages of being simple in method and low in cost, and having a good market application prospect.