An antibacterial plastic wrap

A technology of fresh-keeping film and film layer, applied in the field of fresh-keeping materials, can solve the problems of not being able to prevent bacterial erosion, etc., and achieve the effects of avoiding water loss, eliminating ethylene, and alleviating self-consumption of nutrients

Active Publication Date: 2018-07-10
宁波凯杜新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned fresh-keeping methods all prevent aging by delaying the metabolic process of fruits and vegetables, and cannot prevent bacteria from eroding food

Method used

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  • An antibacterial plastic wrap

Examples

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preparation example Construction

[0032] The present invention has no special limitation on the preparation method of the antibacterial fresh-keeping film, and the preparation method of the fresh-keeping film well-known to those skilled in the art can be adopted. In the present invention, the preparation of described antibacterial fresh-keeping film preferably comprises the following steps:

[0033] Mixing at least one of the back layer base material, the middle layer base material and the surface layer base material with the negative ion material respectively, and extruding it as a raw material to obtain an antibacterial fresh-keeping film;

[0034] Or use the back layer substrate, the middle layer substrate and the surface layer substrate as raw materials, extrude to obtain a multilayer film, and then spray the negative ion material on the inner surface and / or outer surface of the multilayer film to obtain an antibacterial fresh-keeping film;

[0035] Or mix at least one of the back layer base material, the ...

Embodiment 1

[0039] Mix polyethylene and negative ion material as the back layer material, polyvinyl chloride as the middle layer material, polypropylene as the surface layer material, and the content of the negative ion material is 5%, to prepare an antibacterial fresh-keeping film;

[0040] The negative ion material includes zirconium dioxide, lutetium oxide, tourmaline and lanthanum oxide in a mass ratio of 10:1:10:0.5.

[0041] The antibacterial preservative film prepared in this example has an anion release rate of 9000 / cm 2 / min.

Embodiment 2

[0043] Polyethylene is used as the material of the back layer, polyvinyl chloride is used as the material of the middle layer, polypropylene and anion material are mixed as the surface layer material, and the content of the anion material is 1%, and an antibacterial fresh-keeping film is prepared.

[0044] The negative ion release rate of the antibacterial plastic wrap prepared in this example is 1000 / cm 2 / min;

[0045] The negative ion material includes zirconium dioxide, lutetium oxide, tourmaline and lanthanum hydroxide in a mass ratio of 1:5:10:10.

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Abstract

The invention provides an antibacterial preservative film. The antibacterial preservative film provided by the invention adopts a multilayer film structure comprising a back layer, a middle layer and a surface layer, wherein at least one layer of the multilayer film structure comprises a negative ion material. The negative ion material is added in the preservative film, and the released negative ions have high activity and a strong oxidation-reduction effect and can destroy the activity of cytomembrane or cellular plasm active enzyme of bacteria, so that the antibacterial and bactericidal aims are fulfilled, ethylene released by fruit and vegetables can be eliminated, nutrition self-consumption of the fruit and vegetables is relieved and the preservation time is prolonged; and the negative ion material also can improve the hydrophilicity of the film layer of the preservative film and avoids water loss of the fruit and vegetables. The experimental result indicates that the release speed of the negative ions of the preservative film provided by the invention can reach 10000 / cm<2>*min, and bacteria can be effectively resisted and killed.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping materials, in particular to an antibacterial fresh-keeping film. Background technique [0002] Plastic wrap is a kind of plastic packaging product, usually made of ethylene as the masterbatch through polymerization reaction, mainly used in microwave oven food heating, refrigerator food preservation, fresh and cooked food packaging and other occasions, in family life, supermarkets, hotels and restaurants It is widely used in the field of industrial food packaging. According to the different materials used and the addition of plasticizers, plastic wrap is divided into various types, which can be applied to different occasions. [0003] When fresh food such as vegetables and fruits are packaged with plastic wrap, due to the poor air circulation inside the package and the high ambient humidity, it is easy to cause the growth and reproduction of microorganisms inside the package, and the package...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/20B32B27/30B32B27/32B32B33/00
CPCB32B27/08B32B27/20B32B27/304B32B27/32B32B33/00B32B2250/24B32B2255/10B32B2255/20B32B2307/7145B32B2439/70
Inventor 刘海勇王勇
Owner 宁波凯杜新材料科技有限公司
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