Method for preparing polyethylene/maize cob meal composite material
A technology of corn cob powder and composite materials, which is applied in the field of composite materials, can solve the problems of polyolefin/corn cob powder composite materials that have been reported but have not yet been discovered, and achieve cheap raw materials, suitable for large-scale industrial production, and good machinery. Performance and effects of biodegradability
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Embodiment 1
[0021] Weigh each raw material according to mass percentage: 10% of corn cob powder, 80% of polyethylene, 5% of polyethylene grafted maleic anhydride, 2% of zinc stearate, and the balance is glycerin. Corncob powder and glycerin (glycerin mass is 30% of the corncob powder mass) are added to a high-speed mixer for uniform mixing, then the uniformly mixed mixture is placed in a plastic bag and sealed for 24 to 48 hours to make the small molecular plastic The chemical agent is fully penetrated into the corn cob powder; the above mixture is added to a high-speed mixer together with polyethylene, polyethylene grafted maleic anhydride and zinc stearate for uniform mixing to obtain a polyethylene / corn cob powder mixture, and finally the The above homogeneously mixed polyethylene / corn cob powder mixture is added to the twin-screw extruder, and the mixed Extrude the material to obtain a strip-shaped polyethylene / corn cob powder composite material extrusion with a diameter of about 3mm....
Embodiment 2
[0023] Weigh each raw material according to mass percentage: 20% of corncob powder, 60% of polyethylene, 15% of ethylene-vinyl acetate copolymer, 1% of calcium stearate, and the balance is ethylene glycol. Add corncob powder and ethylene glycol (the quality of ethylene glycol is 20% of the mass of corncob powder) into a high-speed mixer for uniform mixing, then place the well-mixed mixture in a plastic bag and seal it for 24 to 48 hours Make the small molecule plasticizer fully penetrate into the corncob powder; add the above mixture together with polyethylene, ethylene-vinyl acetate copolymer and calcium stearate into a high-speed mixer for uniform mixing to obtain polyethylene / corncob powder mixture , and finally the above-mentioned homogeneously mixed polyethylene / corncob mixture is added to the twin-screw extruder, at an extrusion temperature of 100°C-140°C-160°C-140°C (from the feed port to the discharge port) Next, extrude the mixture to obtain a strip-shaped polyethylen...
Embodiment 3
[0025] Weigh each raw material according to mass percentage: 40% of corncob powder, 50% of polyethylene, 5.5% of ethylene-methyl acrylate copolymer, 0.5% of polyethylene wax, and the balance is glycerin and urea. Glycerin and urea (the total mass of glycerol and urea is 10% of the corn cob powder mass) are mixed evenly and added to the corn cob powder, then added to a high-speed mixer for uniform mixing, and the uniformly mixed mixture is placed in a plastic bag After sealing, place it for 24-48 hours to allow the small molecule plasticizer to fully penetrate into the corncob powder; add the above mixture together with polyethylene, ethylene-methyl acrylate copolymer and polyethylene wax into a high-speed mixer for uniform mixing to obtain poly Ethylene / corncob powder mixture, and finally the above-mentioned homogeneously mixed polyethylene / corncob powder mixture is added to the twin-screw extruder, at 100℃-140℃-160℃-140℃ (from the inlet to the outlet Extrude the mixture at th...
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