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Preparation method of preservative film

A technology of fresh-keeping film and nuclear pore film, which is applied in chemical instruments and methods, lamination devices, lamination auxiliary operations, etc., can solve the problems of short shelf life, difficult control of gas adjustment amount, low air permeability of packaging film, etc. Shelf life, reducing anaerobic respiration and carbon dioxide damage, preventing condensation and external microbial infection

Active Publication Date: 2013-01-16
郭斌 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for most fresh foods, gas exchange with the outside world is required to obtain a better freshness preservation effect, but the existing packaging film has a low air permeability, difficult to control the gas adjustment amount, and a short shelf life

Method used

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  • Preparation method of preservative film
  • Preparation method of preservative film
  • Preparation method of preservative film

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The embodiment of the invention discloses a method for preparing a plastic wrap, comprising:

[0026] Heavy ions irradiate polymer films to obtain latent track films;

[0027] Coating an adhesive on the surface of the sneak track membrane to obtain an intermediate nuclear pore membrane, the part of the intermediate nuclear pore membrane that is not coated with an adhesive forms an etching part, and the part coated with an adhesive forms an adhesive part ;

[0028] Etching the intermediate nuclear pore membrane in an etching solution to obtain a nuclear pore membrane;

[0029] Coating an adhesive on the surface of the intermediate base film, and partially hollowing out the part covered with the adhesive to obtain a base film;

[0030] The nuclear pore membrane is bonded to the hollow part of the base membrane.

[0031] It can be seen from the above scheme that the preparation method provided by the present invention is obtained by firstly preparing the nuclear pore me...

Embodiment 1

[0052] Embodiment 1 prepares fresh-keeping film for apple packaging

[0053] 1. The 22MeV / nucleon Ar-40 accelerated by a high-energy accelerator irradiates a PET film with a thickness of 25μm for 1s, forming a latent track density of 10 7 / m 2 Submerged track membrane;

[0054] 2. Transfer the hot melt adhesive to the submerged track film by gravure printing, the part covered with hot melt adhesive on the submerged track film forms the bonding part, and the part not covered with the hot melt adhesive forms the etched part to obtain Intermediate nuclear pore membrane.

[0055] 3. Etching the intermediate nuclear pore membrane obtained in step 2 in a 7M sodium hydroxide solution at 80°C for 20 minutes, the etched part forms micropores with a pore diameter of 1 micron to obtain a nuclear pore membrane;

[0056] 4. Transfer the hot melt adhesive to the base film polyethylene film by positioning printing, and then partially hollow out the hot melt adhesive, and distribute 6 hole...

Embodiment 2

[0058] Embodiment 2 prepares the fresh-keeping film of pork packaging

[0059] 1. The PET film with a thickness of 20 μm is irradiated with 5 MeV / nucleon S-32 accelerated by a high-energy accelerator to form a latent track density of 10 8 / m 2 Submerged track membrane;

[0060] 2. Transfer the hot melt adhesive to the submerged track film by gravure printing, the part covered with hot melt adhesive on the submerged track film forms the bonding part, and the part not covered with the hot melt adhesive forms the etched part to obtain Intermediate nuclear pore membrane.

[0061] 3. Etching the intermediate nuclear pore membrane obtained in step 2 in 50° C., 7M sodium hydroxide solution for 10 minutes, the etched part forms micropores with a pore diameter of 0.1 micron, and obtains a nuclear pore membrane;

[0062] 4. Transfer the hot melt adhesive onto the base film PE film by positioning printing, and then partially hollow out the place where the hot melt adhesive is, and dis...

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Abstract

The invention provides a preparation method of a preservative film, which comprises the following steps: irradiating a high-polymer film by ions to obtain a latent track film; coating an adhesive on part of the surface of the latent track film to obtain an intermediate nucleopore film, wherein the part, which is not coated with the adhesive, forms an etching part, and the part, which is coated with the adhesive, forms a bonding part; placing the intermediate nucleopore film in an etching solution for etching to obtain a nucleopore film; coating an adhesive on the surface on an intermediate matrix film, and making the part coated with adhesive into a partial hollow structure to obtain a matrix film; and bonding the nucleopore film on the hollow part of the matrix film. The preservative film through which different gases permeate can be prepared through controlling the heavy ion irradiation condition, the etching condition as well as the size of the etching part, so that the possibility that packaged foods suffer from physiological diseases such as anaerobic respiration and damage caused by carbon dioxide are reduced, moisture condensation and external microorganism invasion are prevented effectively, and the quality guarantee period of the fresh products are prolonged.

Description

technical field [0001] The invention relates to the field of food packaging, in particular to a preparation method of a plastic wrap. Background technique [0002] Fresh animal and plant foods such as fruits, vegetables and meat are indispensable gourmet raw materials on people's tables. Fruits and vegetables are not only delicious, but also provide the body with a lot of vitamins and minerals, and the fiber they contain can promote the body's metabolism. Meat provides protein for the human body and energy for life activities. [0003] The shelf life of untreated fresh animals and plants is shorter or the probability of product problems during storage and transportation is higher, because fresh animals and plants carry out complex life activities all the time. For plants such as fruits and vegetables, respiration has the most important impact on the storage performance of fruits and vegetables. Organic substances such as sugars in fruits and vegetables are oxidized and dec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/12B32B37/14B32B38/10B32B38/18
Inventor 丹阳杨铭徐益顺
Owner 郭斌
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