▎ 摘　　要

NOVELTY - Process for preparing polymer composite media comprising polymer composite emulsion and synthetic polymer colloid, involves (a) mixing polymer composite emulsion and synthetic polymer colloid, and high-speed stirring at 800-1200 rpm to obtain a mixed emulsion, and (b) adding the mixed emulsion to a reactor containing a film-forming magnetic balls, guiding by a magnetic material, where the film-forming magnetic balls sink and float in the mixed emulsion, and adsorbing each other on the surface of the mixed emulsion to form a magnetic chain network to obtain a polymer composite boundary medium. USE - The process is useful for preparing polymer composite media. ADVANTAGE - The process effectively cuts bubbles, decreases the air content in the formed polymer composite media, effectively improves quality, effectively intercepts the water vapor of the outside air from penetrating into the polymer composite media, effectively protects from being oxidized, and ensures prolonged shelf life, and reduces the contact area between the entire intermediary layer and outside world, reduces the drying speed of the substrate, reduces the cracking rate, and improves the use effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of using the polymer composite media, involving (i) cleaning the surface of the substrate to be coated, uniformly stirring the polymer composite boundary medium, and coating on the surface of the substrate to form a boundary medium layer, (ii) using a magnetic materials to move on the surface of the boundary medium layer, guiding the film-forming magnetic ball to move laterally along the surface of the substrate on the boundary medium layer, effectively squeezing out the air in the boundary medium layer, and making a portion its ends outside the boundary medium layer, and (iii) scraping the surface of the boundary media layer with a scraper to rupture the film-forming magnetic ball, where the film-forming magnetic fluid inside overflows, forming a diaphragm layer on the surface of the boundary media layer, reducing the contact of the entire boundary media layer with the outside world area, reducing the drying speed of the substrate, reducing the cracking rate, and improving the use effect.