Mildewproof preservative film and preparation method thereof

A fresh-keeping film and anti-mildew technology, applied in antifouling/underwater coatings, coatings, paints containing biocides, etc., can solve problems such as unfriendly to the human body and the environment, food dehydration, etc., to improve the preservation effect and prevent mildew Change, good moisture constant effect

Inactive Publication Date: 2017-05-10
CHANGDE JINRUN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Strong oxidants are not friendly to the human body and the environment; while desiccants a...

Method used

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  • Mildewproof preservative film and preparation method thereof
  • Mildewproof preservative film and preparation method thereof

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preparation example Construction

[0039] refer to figure 2 , the preparation method of the above-mentioned mildew-proof and fresh-keeping paint of the present invention comprises the following steps.

[0040] Step S110 : providing raw materials, including by weight: 20%-60% of resin, 30%-70% of solvent, 0.5%-10% of antifungal agent and 0.3%-5% of auxiliary agent.

[0041] Step S120: Mix the resin, the solvent and the auxiliary agent uniformly to obtain a mixed solution.

[0042] Specifically, the temperature at which the resin, the solvent and the auxiliary agent are mixed in step S120 is 30-65°C.

[0043] Specifically, step S120 includes the following steps: dissolving the resin in the solvent, stirring at a rotational speed of 100-300 r / min, and heating to 30-65°C; adding an auxiliary agent, and continuing at a rotational speed of 200-400 r / min Stir for 30-60 min to obtain a mixed solution. The temperature and stirring intensity are controlled in this way to promote uniform mixing of the mixed solution. ...

Embodiment 1

[0059] The raw materials are provided, including 60% of polyurethane resin, 30% of water, 5% of gingerol and 4% of Tween by weight.

[0060] Dissolve the polyurethane resin in water, stir and heat to 50° C. at a rotational speed of 300 rpm; add auxiliary agents and continue stirring for 50 min at a rotational speed of 300 rpm to obtain a mixed solution. The pH of the mixture after the addition of triethylamine was 7.

[0061] The gingerol was added dropwise to the mixture under stirring at a rotating speed of 600 rev / min. After the dropwise addition of the gingerol was completed, the mixture and the gingerol were continued to be stirred and mixed at a rotating speed of 600 rev / min 1. Cool down to obtain anti-mold and fresh-keeping paint.

[0062] Press 10g / m 2 The coating amount of the PET film was coated on the PET film, and then treated at 80°C, 90°C, 120°C, 100°C and 85°C for 1.2s, respectively, to obtain a mildew-proof fresh-keeping film.

Embodiment 2

[0064] The raw materials provided include, by weight, 47% of polyvinyl alcohol 2488 resin, 40% of water, 8% of the total amount of sorbic acid and turmeric, 2% of Tween and 3% of sodium bicarbonate.

[0065] The polyvinyl alcohol 2488 resin was dissolved in water, stirred at a rotating speed of 100 r / min and heated to 65°C; an auxiliary agent was added, and the stirring was continued at a rotating speed of 200 r / min for 30 min to obtain a mixed solution. The pH of the mixture was 8 after the addition of sodium bicarbonate.

[0066] Sorbic acid and turmeric root alcohol are added dropwise to the mixed solution under stirring at a rotating speed of 800 rev / min. After the dropwise addition of sorbic acid and turmeric root alcohol is completed, the mixed solution, sorbic acid and turmeric root alcohol are continued to rotate at a rotating speed of Stir and mix at 500-800 rpm for 2h. Cool down to obtain anti-mold and fresh-keeping paint.

[0067] The anti-mold and fresh-keeping p...

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Abstract

The invention discloses a mildewproof preservative film and a preparation method thereof. The mildewproof preservative film comprises a base layer and a mildewproof preservative coating arranged on the base layer, wherein the mildewproof preservative coating is prepared from a mildewproof preservative paint. The mildewproof preservative paint comprises the following components in percentage by weight: 20-60% of resin, 30-70% of solvent, 0.5-10% of mildew preventive and 0.3-5% of aid. The resin is composed of at least one of polyurethane, an acrylate copolymer, polyvinyl alcohol, polyvinylidene chloride, modified polyvinylidene chloride, an ethylene-vinyl acetate copolymer, a polyvinyl acetate copolymer and a vinyl acetate-butyl ester copolymer; and the solvent is composed of at least one of water and ethanol. The mildewproof preservative coating of the mildewproof preservative film has the advantages of compact surface and no void; and by adding the mildew preventive, the mildewproof preservative coating has the favorable effects of keeping the moisture constant and preventing mildewing. The mildewproof preservative film is especially suitable for preserving fruits, bread, tobacco and other foods which have shorter storage period, can easily mildew in a short time and need to be eaten in time.

Description

technical field [0001] The invention relates to the technical field of food storage, in particular to a mildew-proof fresh-keeping film and a preparation method thereof. Background technique [0002] Items with a short storage period such as food and tobacco leaves are stored under harsh conditions, otherwise they will be mildewed due to the proliferation of microorganisms, making them no longer fresh and losing their original value. At present, desiccants and strong oxidants are commonly used in the industry to achieve freshness preservation. Desiccans are used to create a relatively water-deficient environment to inhibit the growth of molds; strong oxidants are used to kill molds. But both methods have shortcomings. Strong oxidants are not friendly to the human body and the environment; while desiccants absorb moisture in the air, they also absorb moisture in food, thereby causing the problem of food dehydration. SUMMARY OF THE INVENTION [0003] Based on this, it is n...

Claims

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Application Information

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IPC IPC(8): C09D5/14C09D175/04C09D129/04C09D187/00C09D131/04C09D7/12C08J7/04C08L67/02C08L23/12C08L23/08C08L77/02
CPCC08J2323/08C08J2323/12C08J2367/02C08J2377/02C08J2429/04C08J2431/04C08J2475/04C08J2487/00C08K5/0058C08K5/092C08K5/175C09D5/14C09D129/04C09D131/04C09D175/04C09D187/00C09D7/63C08J7/0427
Inventor 钟文田璐许力许文
Owner CHANGDE JINRUN NEW MATERIAL TECH CO LTD
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