Nano biological mildew-proof preservation film and preparation method thereof

A fresh-keeping film and biological technology, applied in the field of packaging materials, can solve the problems of insufficient anti-mold and fresh-keeping effect and high cost of anti-mold and fresh-keeping film, and achieve the effects of good anti-mold and fresh-keeping effect, low cost and strong adsorption effect.

Inactive Publication Date: 2018-06-01
CHANGDE JINDE NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of high cost and insufficient anti-mildew and fresh-keeping effect on the market, the purpose of the present invention is to provide a nano-biological anti-mildew and fresh-keeping film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Use PP film as the base film layer;

[0015] (2) Preparation of chitosan acetic acid solution coating solution: use deionized water to prepare 1-5% acetic acid solution by mass fraction, disperse and dissolve chitosan in the prepared acetic acid solution with a mass fraction of 5-30%, and then prepare Obtain 5-30% chitosan acetic acid solution;

[0016] (3) Coating: Coating the chitosan acetic acid solution on the base film by screen roller coating method, the dry coating amount is controlled at 1-5g / m 2 ;

[0017] (4) Vacuum evaporation: Use the evaporation machine to control the vacuum chamber to be less than 10 -2 Pa, control the evaporation temperature to 800-1200°C, and the machine speed to 300-800m / min.

Embodiment 2

[0019] (1) Use PET film as the base film layer;

[0020] (2) Preparation of chitosan acetic acid solution coating solution: use deionized water to prepare 1-5% acetic acid solution by mass fraction, disperse and dissolve chitosan in the prepared acetic acid solution with a mass fraction of 5-30%, and then prepare Obtain 5-30% chitosan acetic acid solution;

[0021] (3) Coating: Coating the chitosan acetic acid solution on the base film by screen roller coating method, the dry coating amount is controlled at 1-5g / m 2 ;

[0022] (4) Vacuum evaporation: Use the evaporation machine to control the vacuum chamber to be less than 10 -2 Pa, control the evaporation temperature to 800-1200°C, and the machine speed to 300-800m / min.

Embodiment 3

[0024] (1) Use PVA film as the base film layer;

[0025] (2) Preparation of chitosan acetic acid solution coating solution: use deionized water to prepare 1-5% acetic acid solution by mass fraction, disperse and dissolve chitosan in the prepared acetic acid solution with a mass fraction of 5-30%, and then prepare Obtain 5-30% chitosan acetic acid solution;

[0026] (3) Coating: Coating the chitosan acetic acid solution on the base film by screen roller coating method, the dry coating amount is controlled at 1-5g / m 2 ;

[0027] (4) Vacuum evaporation: Use the evaporation machine to control the vacuum chamber to be less than 10 -2 Pa, control the evaporation temperature to 800-1200°C, and the machine speed to 300-800m / min.

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PUM

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Abstract

The invention provides a nano biological mildew-proof preservation film and a preparation method thereof. The nano biological mildew-proof preservation film is composed of a dielectric layer, a chitosan layer and a base film layer, wherein the chitosan layer is located between the dielectric layer and the base film layer; the dielectric layer is a transparent dielectric layer formed on the chitosan layer by silicon dioxide or zinc sulfate sublimated and condensed, the thickness of which is smaller than 10nm; the chitosan layer is a coating formed by coating a 5-30% chitosan acetic acid solution on the base film; and the base film layer is any one of OPP, PP, PET and PVA films. The mildew-proof preservation film provided by the invention has the characteristics of being good in mildew-proofpreservation effect, low in cost, free of adverse effects on human health and the like. Chitosan has free NH+<2> which can be combined with negatrons to inhibit bacteria; a nanoscale dielectric layeris obtained by evaporation, so that the effective time limit of the chitosan layer can be guaranteed effectively and the chitosan layer has a relatively good semipermeable effect; bacteria adsorbed by the chitosan layer are gathered to the dielectric layer to be killed, so that the chitosan layer is effective continuously.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a nano-biological mildew-proof fresh-keeping film. Background technique [0002] At present, in order to prolong the shelf life of food, most food packaging uses multi-layer composite, aluminum foil composite, etc. to improve the barrier sealing performance of the packaging. However, the packaging film cost of these methods is relatively high, and aluminum products are harmful to human health. Contents of the invention [0003] In order to solve the problems of high cost and insufficient anti-mildew and fresh-keeping effect of the anti-mold and fresh-keeping film currently on the market, the purpose of the present invention is to provide a nano-biological anti-mold and fresh-keeping film. [0004] The purpose of the present invention is to realize through the following technical solutions: [0005] A nano-biological anti-mildew preservation film, compo...

Claims

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Application Information

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IPC IPC(8): B65D65/42B05D7/04B05D3/02
CPCB65D65/42B05D3/0254B05D7/04B05D2201/02
Inventor 余赞田璐钟文罗臻张勇军杜建军
Owner CHANGDE JINDE NEW MATERIAL TECH CO LTD
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