▎ 摘　　要

NOVELTY - Antibacterial modified stone paper comprises co-extruded antibacterial film layer, and a base layer, where the co-extruded antibacterial film layer includes 70-80 wt.% ultrafine calcium carbonate powder, 2-5 wt.% modified antibacterial particles, 1 wt.% coupling agent, 2-5 wt.% extrusion auxiliary agent, 14-23 wt.% polypropylene, and 2-5 wt.% water absorbing particle. The base layer includes 70-80 wt.% ultrafine calcium carbonate powder, 1 wt.% coupling agent, 2-5 wt.% extrusion auxiliary agent, 14-23 wt.% polypropylene, and 2-5 wt.% water-absorbing particles. USE - Used as antibacterial modified stone paper. ADVANTAGE - The method: can efficiently improve the antibacterial treatment performance, improve the surface properties, improve heat resistance of the paper, improve the flow ductility of modified particle, and improve physical strength; can avoids the agglomeration of graphene particle; and provides antibacterial modified stone paper with high tensile strength and elongation, good wear resistance, oil resistance and antibacterial ability, which is conducive to the realization of antibacterial strength of the adhesion surface. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for production of antibacterial modified stone paper comprising (S1), preparing modified polylactic acid, adding the polylactic acid material to a solvent, stirring at room temperature for 12 hours until the polylactic acid is completely dissolved, and then adding quantitative silver nanoparticles and zinc nanoparticles to the above solution, stirring for 24 hours to make it evenly mixed, ultrasonically processing in an ultrasonic water bath for 20 minutes, uniformly dispersing the silver nanoparticles and zinc nanoparticles in the polylactic acid solvent, and allowing to stand for defoaming, (S2) adding the prepared polylactic acid solvent into the graphene oxide dispersion, fully heating up the mixture, thermally crosslinking the polylactic acid solvent into the graphene oxide micropores to obtain a modified graphene solution, (S3) stirring the ultrafine calcium carbonate powder at a high temperature, adding water-absorbing particles and mixing, adding a coupling agent for mixing, and mixing the modified graphene solution, processing aid, and polypropylene after mixing, melting by an internal mixer, obtaining a pellet master batch through a granulator to obtain an antibacterial film layer master batch, (S4) stirring the ultrafine calcium carbonate powder at a high temperature, adding water-absorbing particles and mixing, adding a coupling agent for mixing, simultaneously adding processing aids and polypropylene for mixing, and passing through an internal mixer after melting, obtaining pellet masterbatch by a granulator to obtain a base layer masterbatch, and (S5) sending the obtained base layer masterbatch and antibacterial film layer masterbatch into a twin-screw extruder, melting and rotating the masterbatch using the twin-screw of the extruder, and then extruding through the head to generate pressure, where the die head extrudes the masterbatch and stretches to form a film, which is cut to obtain the main body of the stone paper.