Production method of modified casein label adhesive

Abstract

The invention relates to a production method of a modified casein label adhesive, comprising the following steps: firstly, dissolving polyvinyl alcohol in water under high temperature to obtain polyvinyl alcohol solution; secondly, dissolving borax and casein to obtain casein solution; thirdly, gelatinizing corn starch at 80-85 DEG C to obtain gelatinized corn starch; and finally mixing the polyvinyl alcohol solution with the casein solution and stirring the solutions at 70-75 DEG C to react, sequentially adding dispersing agents, gelatinized corn starch, mixed chelating agents, sorbic acid and disodium hydrogen phosphate to reaction solution and obtaining the finished casein label adhesive after uniform mixing. The invention uses two heavy metal salts as crosslinking agents to modify the casein label adhesive, thus effectively improving the water resistance and the curing rate of the casein label adhesive. The modified casein label adhesive can be widely applicable to manual and mechanical label package of the boxes for food, drinks and cigarette, especially to labeling machines of beer.

Description

technical field

[0001] The invention relates to a production method of label glue, in particular to a production method of modified casein label glue. Background technique

[0002] Label adhesive is an important link in the appearance and image of product packaging, especially the labeling requirements for bottled products are higher. For example, with the rapid development of my country's beer industry, the annual beer output has reached more than 20 million tons. For product grades, some have modified domestic trademark labeling machines, and some have introduced foreign advanced packaging production lines. Not only has the labeling machine speed increased from thousands of bottles per hour to tens of thousands of bottles, but aluminum foil and tin foil have been used as seals. And trademark labels, the requirements for label adhesives are getting higher and higher. Label adhesives with strong initial adhesion, high viscosity, and fast drying speed have attracted more and mo...

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