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
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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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