Mildewproof air-conditioning preservative film for food
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A modified atmosphere fresh-keeping and food technology, which is applied to flat products, seed preservation with a protective coating, application, etc., can solve the problems of insignificant anti-mildew effect and single control method, and achieve good opening and antibacterial effect Significant, simple production process effect
Inactive Publication Date: 2009-08-12
TIANJIN NONGKE FOOD BIO TECH & SCI +1
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However, this control method is single, and the anti-mildew effect is not significant. Therefore, it is particularly important to explore and develop a new type of fo
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example 1
[0019] Example 1: Formula: 70 kg of polyethylene resin, 2 kg of Tecdo, 3 kg of chitosan oligosaccharide, 10 kg of calcium carbonate, 1.5 kg of nano-scale titanium dioxide, 4 kg of silane coupling agent, 1 kg of liquid paraffin, 1 kg of PE wax , 0.8 kg of stearic acid, 0.5 kg of TC888 multifunctional plastic opening agent.
[0020] Preparation method According to the recipe, nano-scale titanium dioxide and calcium carbonate with a particle size of 1-5um were coupled with a silane coupling agent in an electric mixer for 30 minutes and 24 minutes, temperature: 78°C, rotation speed: 200r / min, and then mixed with liquid paraffin , PE wax with a molecular weight of 3500, stearic acid, TC888 multifunctional plastic opening agent and calcium carbonate with a particle size of 1-5um are mixed evenly, and polyethylene resin is added to the mixture and then extruded on a Brabender plasticizer. After two times of granulation, with the help of the shear force of the screw, the chitosan olig...
example 2
[0023] Among them formula: 85 kilograms of polyethylene resins, 4 kilograms of Tecdo, 5 kilograms of chitosan oligosaccharides, 15 kilograms of calcium carbonate, 3 kilograms of nano-scale titanium dioxide, 6 kilograms of silane coupling agents, 2 kilograms of liquid paraffin, 2 kilograms PE wax, 1 kg of stearic acid, 0.8 kg of TC888 multifunctional plastic opening agent.
example 3
[0025] Wherein the formula: 80-kg polyethylene resin, 3 kg Tecdo, 4 kg chitosan oligosaccharide, 12 kg calcium carbonate, 2 kg nano-scale titanium dioxide, 5 kg silane coupling agent, 1.5 kg liquid paraffin, 1.2 1 kg of PE wax, 0.9 kg of stearic acid, 0.6 kg of TC888 multifunctional plastic opening agent.
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Abstract
An anti-mildew modified atmosphere preservative film for food is prepared by the following steps: evenly mixing polyvinyl resin, tecto, chitosan oligosaccharide, calcium carbonate, nanometer titanium dioxide, a silane coupling agent, liquid paraffin, PE paraffin, stearic acid, TC888 multifunctional plastic lubricant; extruding the mixture and granulating on a Brabender plastometer; and finally placing on a film blowing machine for upward blowing molding. As anti-mildew agents the tecto, the chitosan oligosaccharide and the nanometer titanium dioxide are treated and then evenly distributed in the preservative film and a microcellular structure formed by the calcium carbonate has dual effect, the anti-mildew modified atmosphere preservative film for food has stronger permeability for oxygen, carbon dioxide and water vapor, and the nanometer titanium dioxide particles can have very strong effect on biological cells and be taken into the cells very easily, thus being capable of killing harmful bacteria and inhibiting growth of harmful bacteria. The anti-mildew modified atmosphere preservative film has very obvious antibacterial performance.
Description
technical field [0001] The invention belongs to an agricultural product fresh-keeping film, in particular to a method for preparing a food anti-mildew-modified atmosphere fresh-keeping film added with tecton, chitosan oligosaccharide and nano-scale titanium dioxide anti-fungal agent. Background technique [0002] Grain is the necessary food for the survival of Chinese residents, but the food loss is serious due to mildew every year, and most of the traditional anti-mildew methods use spontaneous modified atmosphere (MA) packaging, which uses the respiratory metabolism of the grain itself and the plastic The air permeability of the film adjusts the humidity and gas in the package, thereby prolonging the storage and preservation period of grain. However, this control method is single, and the anti-mildew effect is not significant. Therefore, it is particularly important to explore and develop a new type of food anti-mold modified atmosphere plastic wrap, which has both the mod...
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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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