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Fresh-keeping film and preparation method thereof

A technology of fresh-keeping film and barrier coating, which is applied in the field of fresh-keeping film and its preparation, can solve the problems of insufficient water vapor and air barrier ability, unfriendly human body and environment, poor compactness of fresh-keeping film, etc., and achieve good anti-mold and bactericidal effect, Guaranteed preservation effect, good ability to block water vapor and air

Active Publication Date: 2017-12-29
常德市德源招商投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, 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, which in turn causes food dehydration.
[0003] At present, in the food packaging fields of family life, supermarkets, hotels and restaurants, and industrial production, more and more plastic wraps are used for food preservation, but the traditional plastic wraps are poor in compactness and have a barrier to water vapor and air. Insufficient capacity, poor fresh-keeping effect

Method used

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  • Fresh-keeping film and preparation method thereof

Examples

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preparation example Construction

[0033] A method for preparing a plastic wrap according to an embodiment of the present invention includes the following steps S1 to S3:

[0034] S1. Acquiring the base layer, the base layer includes the opposite first surface and the second surface;

[0035] S2. Coating an anti-mildew coating on the first surface.

[0036] S3. Coating a barrier coating on the second surface to obtain a preservative film.

[0037] Optionally, the base layer is polyethylene terephthalate and / or polyamide, the antifungal coating includes 65% to 85% resin and 15% to 35% antifungal agent, and the barrier coating includes 5% to 40% % polyvinyl alcohol, 5% to 25% agar, 0.05% to 5% borax, 0.05% to 5% boric acid and 30% to 85% water. It can be understood that the specific types of the base layer, the anti-mold coating and the barrier coating are not limited thereto, and the existing preservative film base layer, the anti-mold coating for anti-mold and sterilization and the barrier coating for blockin...

Embodiment 1

[0066] The base layer is obtained, and the base layer includes the opposite first surface and the second surface.

[0067] After the base layer goes through the unwinding step, apply an antifungal coating on the first side by forward coating, and apply a barrier coating on the second side by reverse coating, with a dry coating weight of 2.2g / m 2 , The coating speed is 100m / min.

[0068] Then smooth the anti-mildew coating and barrier coating with a smoothing brush, and when the smoothing brush is in contact with the anti-mildew coating or barrier coating, it is perpendicular to the contact surface, and the pressure of the smoothing brush is 3kg.

[0069] Use a suspension oven to dry the anti-mold coating and barrier coating on the surface of the base layer. The temperature field from the inlet to the outlet of the suspension oven is 45°C, 110°C, 140°C, 150°C, and 110°C.

[0070] Use at least two heating rollers to carry out hot pressing and flattening from the surface of the ...

Embodiment 2

[0072] The preparation method is basically the same as that of Example 1, except that the first surface and the second surface are respectively coated with an antifungal coating and a barrier coating in a forward coating manner.

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Abstract

The invention relates to a fresh-keeping film and a preparation method thereof. The preparation method for the fresh-keeping film comprises the following steps: to obtain a base layer, wherein the base layer comprises opposite first face and second face; coating a mildew-proof coating on the first face; and coating a separation coating on the second face, to obtain the fresh-keeping film. A double-face coating mode is used in the preparation method, the fresh-keeping coatings are coated on two faces of the base layer, and one face is coated with the mildew-proof coating, and the other face is coated with the separation coating. The fresh-keeping film has the good compactness, and better property of blocking water vapor and air, and has the good anti-mildew bactericidal effect. The fresh-keeping effect of the fresh-keeping film is improved by the synergistic effect of two coatings.

Description

technical field [0001] The invention relates to the field of fresh-keeping technology, in particular to a fresh-keeping film and a preparation method thereof. Background technique [0002] The storage conditions for fresh foods such as fruits and meat with a short storage period are relatively harsh, otherwise they will become moldy due to the proliferation of microorganisms, making them no longer fresh and losing their original value. The traditional method in the industry is to use desiccants and strong oxidants to achieve freshness preservation, use desiccants to create a relatively water-deficient environment, inhibit the growth of mold, and use strong oxidants to kill mold. However, strong oxidants are not friendly to the human body and the environment. While desiccant absorbs moisture in the air, it also absorbs moisture in the food, which in turn causes the problem of food dehydration. [0003] At present, in the food packaging fields of family life, supermarkets, ho...

Claims

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Application Information

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IPC IPC(8): C08J7/04C09D123/08C09D127/16C09D127/22C09D133/04C09D175/04C09D5/14C09D7/12C09D129/04C09D105/12B05D5/00B05D7/04B05D1/28B65D65/42C08L67/02
CPCB05D1/28B05D5/00B05D7/04B65D65/42C08J7/04C08J2367/02C08J2405/12C08J2423/08C08J2427/16C08J2427/22C08J2429/04C08J2433/04C08J2475/04C08K2003/387C08L2201/14C08L2205/02C08L2205/035C08L2205/04C08L2207/53C09D5/14C09D105/12C09D123/0853C09D123/0861C09D127/16C09D127/22C09D129/04C09D133/04C09D175/04C08L27/16C08L27/22C08L23/0861C08L33/04C08L75/04C08L5/08C08K5/0058C08L23/0853C08L5/12C08K3/38C08L29/04
Inventor 张勇军钟文罗臻韦雪雪田璐
Owner 常德市德源招商投资有限公司
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