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Antibacterial polyethylene food packaging film and preparation method thereof

A technology of food packaging film and polyethylene, applied in the field of food packaging film, can solve the problem of not being able to guarantee long-term antibacterial requirements, and achieve the effect of improving the migration rate and reducing the amount of use

Active Publication Date: 2018-12-21
JIANGYIN TONGLI OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the initial antibacterial effect of the film added with small molecule quaternary ammonium salt is excellent, but for foods with a long shelf life, quaternary ammonium salt antibacterial agents, especially small molecule quaternary ammonium salt antibacterial agents, cannot guarantee long-term antibacterial requirements

Method used

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  • Antibacterial polyethylene food packaging film and preparation method thereof
  • Antibacterial polyethylene food packaging film and preparation method thereof

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Effect test

Embodiment 1-8

[0030] Antibacterial film layer in embodiment 1-8 antibacterial polyethylene food packaging film, the raw material composition comprises: substrate polyethylene, nanoscale inorganic antibacterial agent, compatibilizer, quaternary ammonium salt antibacterial agent grafted nanocrystalline cellulose, quaternary ammonium The salt antibacterial agent grafted nanocrystalline cellulose is prepared by grafting quaternary ammonium salt monomer methacryloyloxyethyl-benzyl-dimethylammonium chloride and nanocrystalline cellulose by irradiation. Embodiment 1-4 raw material composition parts by weight are shown in the following table:

[0031]

Embodiment 1

[0032] The preparation steps of embodiment 1 quaternary ammonium salt antibacterial agent grafted nanocrystalline cellulose are:

[0033] S1: The preparation of nanocrystalline cellulose adopts the method disclosed in CN105584165A: after mixing the MCC raw material with 60% sulfuric acid, acidolysis at 50-60°C for 120-150 minutes; then the product is treated with a dialysis bag until the pH of the product is It is neutral and dried to obtain rod-shaped nanocrystalline cellulose;

[0034] S2: Disperse nanocrystalline cellulose and methacryloxyethyl-benzyl-dimethylammonium chloride in deionized water, Co 60 γ-ray irradiation reaction for 2 minutes, repeated washing with deionized water, and vacuum drying to obtain quaternary ammonium salt antibacterial agent grafted nanocrystalline cellulose.

[0035] The concentration of nanocrystalline cellulose in S2 was 4 mg / ml, and the concentration of methacryloyloxyethyl-benzyl-dimethylammonium chloride was 3 mg / ml.

[0036] The irradia...

Embodiment 2

[0037] The difference between the preparation steps of quaternary ammonium salt antibacterial agent grafted nanocrystalline cellulose in Example 2 and Example 1 is S1 and process parameters: microcrystalline cellulose is added in the ammonium persulfate solution, centrifugally washed to neutral after ultrasonic reaction , adding organic acid solution to continue ultrasonic reaction, high-speed centrifugation and washing to neutrality, dialysis and drying to obtain nanocrystalline cellulose;

[0038] Co in S2 60 The reaction time of γ-ray irradiation is 5min; the concentration of nanocrystalline cellulose is 15mg / ml, and the concentration of methacryloyloxyethyl-benzyl-dimethylammonium chloride is 2mg / ml; S2 irradiation grafted The radiation dose is 25kGy; the concentration of ammonium persulfate solution is 2mol / L; the organic acid is citric acid, and the concentration of organic acid is 0.7mol / L.

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Abstract

The invention discloses an antibacterial polyethylene food packaging film. The antibacterial polyethylene food packaging film comprises one or more layer of antibacterial film layer; the polyethyleneantibacterial film layer is prepared from the following raw materials in parts by weight: 85 to 97.1 parts of a base material polyethylene, 0.05 to 0.3 part of a nano-grade inorganic antibacterial agent, 0.5 to 3.5 parts of a compatibilizer and 2 to 5 parts of a quaternary ammonium salt antibacterial agent grafted nano-crystalline cellulose, wherein the quaternary ammonium salt antibacterial agentgrafted nano-crystalline cellulose is prepared by irradiating and grafting a quaternary ammonium salt monomer methacryloyloxyethyl-benzyl-dimethyl ammonium chloride and nano-crystalline cellulose. The antibacterial polyethylene food packaging film adopts a compound antibacterial agent prepared by combining the inorganic antibacterial agent and an organic antibacterial agent; the organic antibacterial agent is fixed in a film layer in a grafted nano-crystalline cellulose form and the dosage of the inorganic antibacterial agent in a polyethylene thin film can be reduced; the obtained polyethylene film is applicable to food packages capable of the longer shelf life.

Description

technical field [0001] The invention belongs to the technical field of food packaging films, and in particular relates to an antibacterial polyethylene food packaging film and a preparation method thereof. Background technique [0002] Antibacterial film refers to the film supported by adding antibacterial materials to the film-forming material. Due to the limitation of the types of antibacterial agents, the preparation technology of antibacterial plastics for food packaging is very different from the production technology of antibacterial plastics for other purposes in the past. . At present, the antibacterial agents used in food packaging are mainly organic natural, organic synthetic and inorganic. Organic natural antibacterial agents include chitosan and its derivatives, konjac glucomannan, cellulose and its derivatives, starch and its derivatives, alginate, tea polyphenols, anthocyanins, and flavors with antibacterial effects, etc. , its limitation lies in its high saf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L51/02C08K3/22C08J5/18C08F251/02C08F220/34B32B27/32B32B27/18B32B27/08B32B33/00
CPCB32B27/08B32B27/18B32B27/32B32B33/00B32B2307/54B32B2307/7145C08F251/02C08J5/18C08J2323/06C08J2451/02C08K2003/2241C08K2003/2296C08K2201/011C08F220/34
Inventor 周永南
Owner JIANGYIN TONGLI OPTOELECTRONICS TECH