Method for preparing waterproof polyvinyl alcohol trademark adhesive

Abstract

The invention discloses a method for preparing a waterproof polyvinyl alcohol trademark adhesive. The method comprises the following steps of: (1) weighing a certain amount of polyvinyl alcohol, dissolving weighed polyvinyl alcohol in water, heating in a water bath, and stirring for swelling to obtain a 8-20% polyvinyl alcohol solution; (2) adjusting the temperature of the polyvinyl alcohol solution obtained from step (1), adding aluminum sulfate, and stirring at constant temperature to obtain the waterproof polyvinyl alcohol trademark adhesive, wherein aluminum sulfate is 12-25% the weight of polyvinyl alcohol. The waterproof polyvinyl alcohol trademark adhesive has strong water resistance.

Description

technical field [0001] The invention relates to a preparation method of polyvinyl alcohol trademark glue, in particular to a preparation method of water-resistant polyvinyl alcohol trademark glue. Background technique [0002] In the process of beer production, the quality of beer bottle labeling glue not only directly affects the production efficiency of beer, but also affects the quality of labeling. The best drinking temperature of beer is 8-10°C. In summer, most consumers like to drink it chilled. For beer, beer bottles are often placed in ice water or refrigerators, which requires the beer label glue to have better resistance to ice water; otherwise, it will easily cause the label to fall off and affect the appearance of the product. The price of PVA label glue is low and non-toxic , but its water resistance is poor and it is easy to gel at low temperature, which seriously affects its market promotion and application. Contents of the invention [0003] The purpose of...

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Problems solved by technology

[0002] In the process of beer production, the quality of beer bottle labeling glue not only directly affects the production efficiency of beer, but also affects the quality of labeling. The best drinking temperature of beer is 8-10°C. In summer, most consumers like to drink it chilled. For beer, beer bottles are often placed in ice water or refrigerators, which requires the beer label glue to have better resistance to ice water; otherwise, it will easily cause the label to fall off and affect the appearance of the product. The price of PVA label glue is low and non-toxic , but poor water resistance and easy to gel at low temperature, seriously affecting its marketing and application

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