Composition for Low density, Ultrathin, and Inorganic Film and Its Preparation Method

Abstract

A composition for low density, ultrathin, and inorganic films, comprising a mixture of 70-82% of calcium carbonate by weight, 10-15% of linear polyethylene by weight, 1-5% of stearic acid by weight, 0.40-0.80% of aluminate by weight, 0.20-0.80% of titanic acid ester by weight, 0.4-3.0% of modified polyethoxylated silicone emulsion by weight, 0.05-0.5% of foaming agent by weight, and 0.01-0.1% of foaming agent accelerator by weight. The inorganic of the present invention is reduced in thickness, light in weight, easy to degrade, high tensile and high tear strength, toxicity-free, high temperature resistance, and low prices, so as to fulfill the requirement of producing the mulch, trash bags, shopping bags, and package bags.

What is claimed is: 
     
         1 . A preparation method for an ultra-thin, inorganic, and low density film, comprising steps of:
 (a) preparing organic grains by the steps of:   (a.1) mixing calcium carbonate, linear polyethylene, polyethylene wax into a mixer to form a first mixture;   (a.2) increasing a temperature of said first mixture;   (a.3) mixing stearic acid with said first mixture to form a second mixture;   (a.4) mixing aluminate and titanic acid ester with said second mixture to form a third mixture;   (a.5) mixing foaming agent, foaming agent accelerator and modified polyethoxylated silicone emulsion with said third mixture to form a fourth mixture;   (a.6) adding refined paraffin wax into said fourth mixture to form an inorganic mixture; and   (a.7) extruding said inorganic mixture to form said inorganic grains; and   (b) forming an inorganic film by the steps of:   (b.1) mixing said inorganic grains with PE into a film blowing machine to form a film mixture;   (b.2) increasing a temperature of said to form a film mixture; and   (b.3) when a density of said to form a film mixture is between 0.80 g to 0.95 g/cm 3 , forming said ultra-thin, inorganic, and low density film by said film blowing machine.   
     
     
         2 . The method, as recited in  claim 1 , wherein 70-82% of calcium carbonate by weight, 10-15% of linear polyethylene by weight, 1-5% of stearic acid by weight, 0.40-0.80% of aluminate by weight, 0.20-0.80% of titanic acid ester by weight, 0.4-3.0% of modified polyethoxylated silicone emulsion by weight, 0.05-0.5% of foaming agent by weight, 0.01-0.1% of foaming agent accelerator by weight, not more than 2% of polyethylene wax by weight, and not more than 3% of refined paraffin wax by weight are used for forming said ultra-thin, inorganic, and low density film. 
     
     
         3 . The composition, as recited in  claim 2 , wherein a granularity of said calcium carbonate is 1-3 micron. 
     
     
         4 . The method, as recited in  claim 3 , wherein said foaming agents is 4,4-oxydibenzenesulfonyl hydrazide. 
     
     
         5 . The method, as recited in  claim 4 , wherein said foaming agents accelerator is a surface treatment urea. 
     
     
         6 . The method, as recited in  claim 4 , wherein said modified polythoxylated silicone emulsion has 70% of modified polythoxylated silicone. 
     
     
         7 . The method, as recited in  claim 6 , wherein the step (a.6) further comprises the steps of:
 (a.6.1) cooling down a temperature of said inorganic mixture; and   (a.6.2) placing said inorganic mixture in an extruder with 12-seciton heating process, wherein said inorganic mixture is heated at 155° C., 155° C., 210° C., 155° C., 155° C., 210° C., 155° C., 155° C., 210° C., 155° C., 155° C. in sequence until the temperature of said inorganic mixture reaches to 210° C. finally.   
     
     
         8 . The method, as recited in  claim 7 , wherein a proportion of said inorganic grains and said PE is 90:10, 80:20, 30:70, or 60:40 by weight.