High-blocking PE coating film for liquid food packaging and preparation method thereof

A liquid food, high barrier technology, applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of decreased barrier property and high oxygen permeability of modified PE film, so as to improve bonding performance, reduce hydrophilicity and Hygroscopicity, effect of reducing oxygen permeability

Inactive Publication Date: 2018-08-14
席海龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a high-barrier PE coating film for liquid food packaging and its preparation method, which has the advantages of improving oxygen barrier performance, improving moisture barrier performance and improving production efficiency, and solves the problem of improvement. High oxygen permeability of permanent PE film and the technical problem that the barrier property decreases with the increase of humidity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) Put 70 parts by mass of PE film into 20 parts by mass of acetone for extraction for 12 hours to remove various additives remaining on the surface during the preparation of the PE film. After the extraction, place the PE film in a vacuum-dried Dry in the oven at 55°C for 6 hours to remove acetone;

[0057] (2) Add 8 parts by mass of acetone to 120 parts by mass of absolute ethanol, stir and mix evenly, then add 40 parts by mass of ultrapure water, after dilution, continue to stir and mix uniformly to obtain acetone-water-ethanol Photoinitiator system solution;

[0058] (3) the methyl methacrylate of 10 mass parts is joined in the ultrapure water of 30 mass parts, stirs and mixes evenly, makes the methyl methacrylate photoinitiator system solution;

[0059] (4) Place the first layer of PE film processed through step (1) on the upper surface of the first piece of quartz glass, get 3ml of acetone-water-ethanol photoinitiator system solution with a dropper, drop evenly ...

Embodiment 2

[0079] (1) Put 75 parts by mass of PE film into 30 parts by mass of acetone for extraction for 15 hours to remove various additives remaining on the surface during the preparation of the PE film. After the extraction, place the PE film in a vacuum-dried Dry in the oven at 55°C for 7 hours to remove acetone;

[0080] (2) Add 10 parts by mass of acetone to 150 parts by mass of absolute ethanol, stir and mix evenly, then add 50 parts by mass of ultrapure water, after dilution, continue to stir and mix uniformly to obtain acetone-water-ethanol Photoinitiator system solution;

[0081] (3) the methyl methacrylate of 12 mass parts is joined in the ultrapure water of 35 mass parts, stirs and mixes evenly, makes the methyl methacrylate photoinitiator system solution;

[0082] (4) Place the first layer of PE film processed through step (1) on the upper surface of the first piece of quartz glass, get 4ml of acetone-water-ethanol photoinitiator system solution with a dropper, drop evenly...

Embodiment 3

[0102] (1) Put 80 parts by mass of PE film into 40 parts by mass of acetone for extraction for 18 hours to remove various additives remaining on the surface during the preparation of the PE film. After the extraction, place the PE film in a vacuum-dried Dry in the oven at 55°C for 8 hours to remove acetone;

[0103] (2) Add 12 parts by mass of acetone to 180 parts by mass of absolute ethanol, stir and mix evenly, then add 60 parts by mass of ultrapure water, after dilution, continue to stir and mix uniformly to obtain acetone-water-ethanol Photoinitiator system solution;

[0104] (3) the methyl methacrylate of 15 mass parts is joined in the ultrapure water of 40 mass parts, stirs and mixes evenly, makes the methyl methacrylate photoinitiator system solution;

[0105] (4) Place the first layer of PE film processed through step (1) on the upper surface of the first piece of quartz glass, get 5ml of acetone-water-ethanol photoinitiator system solution with a dropper, drop evenly...

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Abstract

The invention discloses a high-blocking PE coating film for liquid food packaging and a preparation method thereof. The high-blocking PE coating film for liquid food packaging comprises a modified PEfilm, wherein modified EVOH latex is covered on the outer side surface of the modified PE film; modified MXD6 latex is covered on the inner side surface of the modified PE film; the modified PE film is prepared from the following raw materials including the PE film, acetone, super pure water, absolute ethyl alcohol, methyl methacrylate and polyethylenimine solution; the modified EVOH latex is prepared from the following raw materials of acetic acid vinyl ester, vinyl monomers, tertiary butanol, methyl alcohol, sodium hydroxide, acetone, super pure water, benzoic acid peroxide, 6-tert-butyl-m-cresol, polyoxyethylene laurate, zinc sulfate, trimethylolpropane and diethylene glycol dibenzoate; the modified MXD6 latex is prepared from the following raw materials of hexanedioic acid, m-xylylenediamine, super-pure water, disodium hydrogen phosphate and polyethylene glycol. The technical problems that the oxygen transmission rate of the modified PE film is high, and the blocking performance descends along with the temperature rise are solved.

Description

technical field [0001] The invention relates to the technical field of high-barrier coating materials, in particular to a high-barrier PE coating film for liquid food packaging and a preparation method thereof. Background technique [0002] An important technical requirement of flexible plastic packaging is to have good gas and moisture resistance, because many food spoilage is due to the penetration of oxygen and moisture into the food through the packaging material, providing the necessary conditions for the growth of bacteria , resulting in oxidative deterioration of food. [0003] For liquid foods such as dairy products, because they need to be stored in a low-temperature and high-humidity environment, PE films have excellent low-temperature resistance, the lowest operating temperature can reach -70 degrees Celsius, good chemical stability, and the permeability of water vapor The efficiency is relatively poor, especially suitable for packaging waterproof and moisture-pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/18C08J7/04C08F8/12C08F218/08C08F210/02C09D129/04C09D7/61C09D7/63C09D7/65C08G69/44B65D65/42C08L23/06
CPCB65D65/42C08F8/12C08F218/08C08G69/44C08J7/04C08J7/18C08J2323/06C08J2429/04C08J2477/12C08J2479/02C08F210/02
Inventor 不公告发明人
Owner 席海龙
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