Antimicrobial and mildew resistant preservative film and preparation method thereof
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An antibacterial, anti-mildew, and plastic wrap technology, applied in the field of plastic wrap, can solve problems such as easy reunion, poor dispersion, discounted antibacterial effect, etc.
Inactive Publication Date: 2015-12-09
陆思烨
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However, chitosan is insoluble in general organic solvents and water, and its antibacterial activity is only shown in acidic solution systems.
However, titanium dioxide has the problems of small specific surface area, poor dispersion, and easy agglomeration, resulting in the area where titanium dioxide is not distributed is still easy to adhere to bacteria and molds, which greatly reduces the antibacterial effect, and the bactericidal ability of titanium dioxide comes from its photocatalytic activity. restricted
Method used
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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Embodiment 1
[0031] 1. Raw material preparation:
[0032] ①Preparation of loess powder: collect a certain weight of loess, pulverize it through a 60-mesh sieve, add deionized water with 9 times the weight of loess, and then add sodium hydroxide solution with a concentration of 1-25wt% for mixing and pulping, and control the pH value of the slurry 8. After stirring and reacting for 5 hours, add an appropriate amount of acetic acid to adjust the pH value to be neutral, continue stirring and reacting for 6 hours, filter and wash the filter cake with deionized water 3 times, bake at 250 ° C for 2 hours, and grind through an 800-mesh sieve to obtain a white loess powder;
[0033] ②Preparation of loquat leaves, walnut leaves, and black tallow leaves: collect fresh, non-rotten loquat leaves, walnut leaves, and black tallow leaves, wash them separately, dry them, pulverize them into 15-mesh pieces, and pour them into the corresponding homogenizers Then add water 10 times the weight of the fragmen...
Embodiment 2
[0042] 1. Raw material preparation:
[0043] ①Preparation of loess powder: collect a certain weight of loess, pulverize it through a 60-mesh sieve, add deionized water with 12 times the weight of loess, and then add sodium hydroxide solution with a concentration of 1-25wt% for mixing and pulping, and control the pH value of the slurry 8.5. After stirring the reaction for 7 hours, add an appropriate amount of acetic acid to adjust the pH value to be neutral, continue the stirring reaction for 6 hours, filter and wash the filter cake with deionized water 3 times, bake at 350 ° C for 1 hour, and grind through an 800-mesh sieve to obtain a white loess powder;
[0044]②Preparation of loquat leaves, walnut leaves, and black tallow leaves: collect fresh, non-rotten loquat leaves, walnut leaves, and black tallow leaves, wash them separately, dry them, pulverize them into 25-mesh pieces, and pour them into the corresponding homogenizers Then add water 12 times the weight of the fragme...
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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Abstract
The invention provides an antimicrobial and mildew resistant preservative film and a preparation method thereof. The preservative film comprises the following raw materials in percentage by weight: 30-65% of a polymer, 3.5-12% of a natural antibacterial agent, 1.5-3% of sand sagebrush seed oil, 1.5-3% of cuttlefish bone, and 1.5-3% of glyceryl monooleate; the raw materials are subjected to various processing means to prepare the preservative film, and the prepared preservative film is bright, transparent, soft, thin and light, not only has excellent mechanical strength, ageing-resistant performance, good stretchability and tearing property, but also has the effects of being broad in antifungal spectrum, uniform in distribution, highly efficient, durable and safe, effectively inhibits the growth and reproduction of various malignant bacteria, fungi and mould, and at the same time, shows better barrier property, gas permeability, moisture-penetrability and gas replaceability, and automatically and persistently emits far infrared rays, so as to achieve the functions of purifying the environment, eliminating peculiar smell, self-cleaning and resisting mildew; besides, the preservative film provided by the invention can be directly used for storing various food, prolonging the preservation time, and has a broad application prospect.
Description
technical field [0001] The invention belongs to the technical field of fresh-keeping films, in particular to an antibacterial and mildew-proof fresh-keeping film and a preparation method thereof. Background technique [0002] Plastic wrap is generally made of polyethylene, polyvinylidene chloride, and polyvinyl chloride as raw materials and additives for melt extrusion, granulation, and blow molding. It can be seen everywhere in daily life. It is mainly used for the packaging of grains, fruits, vegetables, meat, fish, soy products, seafood and other foods to block dust in the air and avoid bacterial erosion, thereby prolonging the preservation period. However, the preservative film currently on the market is prone to accumulation of water droplets in the film during use, and even fogging, which affects the appearance and taste of food. In addition, it does not have antibacterial and antifungal functions, and often due to the influence of temperature and humidity, a good env...
Claims
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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