Processing method of composite aluminum foil
A technology of composite aluminum foil and processing method, which is applied in the directions of devices and coatings for coating liquid on the surface, can solve the problems of wrinkling, low rupture resistance, low strength of aluminum foil, etc., to improve wear resistance and corrosion resistance, The effect of good crack resistance and high quality stability
Inactive Publication Date: 2018-07-13
淮南市通宇塑编有限公司
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Problems solved by technology
Aluminum foil itself has low strength, poor tear resistance, poor folding resistance, and low rupture strength. It is prone to defects such as cracks and wrinkles when folded, and the wear resistance and corrosion resistance of aluminum foil are relatively low. These problems will lead to aluminum foil The barrier property is easily damaged, which affects its protection performance for packaged items
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0019] A processing method of composite aluminum foil, comprising the following steps:
[0020] (1) Mix 2 parts by weight of methyltrimethoxysilane, 1 part by weight of tetraethyl orthosilicate and 10 parts by weight of isopropanol, then slowly add a mixture of 2 parts by weight of water and 0.5 parts by weight of hydrochloric acid solution, and then Stir and react at 50°C for 5 hours, adjust the pH to neutral after cooling, and obtain the aluminum foil surface coating;
[0021] (2) Add 0.1 parts by weight of nanocrystalline cellulose and 0.05 parts by weight of silane coupling agent KH550 to 1.5 parts by weight of absolute ethanol for ultrasonic dispersion, and then add 0.1 parts by weight of polyvinylpyrrolidone, 10 parts by weight of natural rubber emulsion and 20 Parts by weight of pure acrylic emulsion are uniformly dispersed at high speed to obtain an aluminum foil primer;
[0022] (3) First, apply the aluminum foil surface coating evenly on one side of the aluminum foi...
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Abstract
The invention discloses a processing method of composite aluminum foil. According to the processing method, methyltrimethoxysilane and tetraethyl orthosilicate are adopted as precursors; through a sol-gel reaction, composite sol is formed and serves as aluminum foil surface layer coating; nanocrystalline cellulose is subjected to graft modification by utilizing a silane coupling agent KH550; afterthe nanocrystalline cellulose subjected to graft modification is mixed with a natural rubber emulsion, a nanocrystalline cellulose-KH550-natural rubber composite emulsion is obtained and serves as aluminum foil bottom layer coating; two surfaces of aluminum foil are correspondingly coated with the aluminum foil surface layer coating and the aluminum foil bottom layer coating; and after sufficientdrying, the composite aluminum foil is obtained. The composite aluminum foil produced according to the processing method disclosed by the invention is high in abrasion resistance, corrosion resistance and folding resistance; the anti-cracking performance is good; the possibility that cracks, folds and other defects occur is low; the shielding performance is good; the quality stability is high; and the application scope is broad.
Description
technical field [0001] The invention relates to the technical field of packaging materials, in particular to a processing method of composite aluminum foil. Background technique [0002] Aluminum foil is a thin flexible material rolled from electrolytic aluminum or aluminum alloy sheet. Its performance has many similarities with metal aluminum. Its appearance is silvery white and has a gorgeous metallic luster. It is easy to process various Beautiful patterns and patterns of colors, and has the advantages of light weight, good processing adaptability, high temperature resistance, low temperature performance, high barrier property, strong protection, non-toxic, tasteless and not easy to produce pollution, etc., can improve the water vapor resistance necessary for packaging materials , air, ultraviolet and bacteria shielding performance, so that the packaging is well protected, suitable for packaging and printing materials. [0003] Although it has many excellent properties, ...
Claims
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IPC IPC(8): B05D7/14B05D7/24
CPCB05D7/14B05D7/24B05D2202/25B05D2252/10
Inventor 张树行
Owner 淮南市通宇塑编有限公司