Mould-proof preservative film and preparation method thereof
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A fresh-keeping film and anti-mildew technology, applied in anti-fouling/underwater coatings, coatings, paints containing biocides, etc. problems, to achieve the effect of improving the storage life of food, good anti-mold effect, and preventing the growth of microorganisms
Active Publication Date: 2018-09-21
常德市德源招商投资有限公司
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Abstract
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Problems solved by technology
However, the fresh-keeping performance of ordinary anti-mold plastic wrap is poor, and fresh food is easy to oxidize and rot and lose its original value.
Method used
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preparation example Construction
[0026] The preparation method of the above-mentioned mildew-proof fresh-keeping film according to an embodiment of the present invention comprises the following steps: taking each raw material according to the mass fraction to prepare the mildew-proof fresh-keeping coating, unwinding the base film so that the base film passes through the coating roller to coat the mildew-proof The fresh-keeping paint is then dried in an oven, cooled by a cooling roller, and finally rolled to obtain a mildew-resistant plastic wrap.
[0027] Specifically, the oven has 3-5 sections, the temperature rises first and then decreases in a gradient, the moving speed of the base film is 60-180 m / min, and the temperature of the cooling roll is 20-35°C.
[0028] Optionally, the method for preparing the above-mentioned anti-mold and fresh-keeping coating in an embodiment includes the following steps S1-S3:
[0029] S1. Weigh each raw material according to the parts by mass.
[0030] S2. Put the resin and ...
Embodiment 1
[0035]Weigh each raw material according to the following parts by mass: 62 parts of resin, 5 parts of sodium diacetate, 1 part of arbutin, 1 part of thymol, 2 parts of Houttuynia cordata injection, 2 parts of astragalin, 2 parts of quercetin 0.4 parts, 1 part of soybean isoflavone, 0.8 parts of spermidine trihydrochloride, 0.2 parts of rutin, 0.8 parts of chlorogenic acid, 32 parts of water, 0.5 parts of surfactant, 0.5 parts of leveling agent and 0.5 parts of dispersant. Among them, the resin is composed of the following components by mass percentage: 32% ethylene-vinyl acetate copolymer, 38% polyvinylidene chloride, 14% ethylene-vinyl alcohol copolymer, 12% core-shell structure acrylate copolymer and 4% IPN structural polyurethane. Put the resin and water into the reaction kettle, heat the reaction kettle to 50° C., turn on the stirring device, and stir at 600 rpm for 1 hour. Then put the remaining raw materials into the reaction kettle, and continue to stir at 1000 rpm for...
Embodiment 2
[0037] The experimental procedure of Example 2 is basically the same as that of Example 1, except that the raw materials do not include ascarin and quercetin.
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Abstract
The invention relates to a mould-proof preservative film and a preparation method thereof. The mould-proof preservative film comprises a base film and a mould-proof and fresh-keeping coating arrangedon the base film, the mould-proof and fresh-keeping coating is made of mould-proof and fresh-keeping coating, and the mould-proof and fresh-keeping coating is prepared from the following raw materialsin parts by mass: 60-65 parts of resin, 5-10 parts of mould-proof agent, 30-35 parts of solvent and 0.3-2 parts of auxiliary agent, wherein the resin is composed of the following components in percentage by mass: 28-32% of ethylene-vinyl acetate copolymer, 36-40% polyvinylidene chloride, 12-15% ethylene- ethylene alcohol copolymer, 10 to 12% core-shell structural acrylate copolymer and 4-6% IPN structural polyurethane. The mould-proof preservative film can limit the adsorption and dissolution of the water vapor molecules to the maximum extent, effectively limit the external water to enter theinterior of the packaging material, inhibit the occurrence of mould, keep the water content in the package constant, and the mould-proof agent exposes on the surface of the coating in an embedded manner and the purpose of preventing the growth of the microorganism is achieved by eliminating the microorganism or preventing the germination of the microorganism after the contact with the microorganism.
Description
technical field [0001] The invention relates to the technical field of mildew-proof and fresh-keeping, in particular to a mildew-proof and fresh-keeping film and a preparation method thereof. Background technique [0002] Fresh food is an important source of nutrients that people need daily, and has unique shape, color, aroma and taste. Fresh food has high water content and rich nutrition, but it is not resistant to storage, and it is easy to perish and deteriorate, resulting in a decrease in quality, or even a complete loss of commodity value and nutritional value. The storage and preservation of fresh food is the continuation of production activities. Maintaining food quality and freshness is one of the important goals that people pursue, and it is a problem that must be solved in the process of food storage, transportation and circulation. [0003] At present, in the field of food packaging and transportation in family life, supermarkets, hotels and restaurants, and indu...
Claims
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Application Information
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