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Preparation method of waterproof label adhesive

A technology of adhesives and labels, applied in the direction of adhesive types, grafted polymer adhesives, non-polymer adhesive additives, etc., can solve problems such as dependence on imports, lack of production technology, and high costs

Inactive Publication Date: 2012-11-28
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Casein-based adhesives have good initial tack, water resistance and alkaline cleaning properties, but their cost has been high, coupled with the lack of relevant production technology, domestic high-speed beer production lines and manufacturers using metal foil as label glue, most of them dependent on imports

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0013] First mix 100g-150g of polyvinyl alcohol, 2-3mL of emulsified silicone oil, and 1000g of water. After stirring, slowly heat to 80-90°C and keep it warm for 30min, then cool down to 70°C to obtain an aqueous solution of polyvinyl alcohol, and add the initiator ammonium persulfate 0.3g-0.5g. At the same time, mix and emulsify 30g-35g of acrylic acid, 5g of butyl acrylate, 10g-15g of styrene, 12g of acrylamide, 0.5g of ammonium persulfate, 2mL of emulsified silicone oil, and 20-30mL of water for 30 minutes to obtain an emulsion. Then slowly add the emulsion into the polyvinyl alcohol aqueous solution, raise the temperature to 80-90°C, keep it warm for 1-2h, and then lower it to room temperature. Finally, add 4g-6g of zinc oxide, stir well for 15min, adjust the pH to 6-7 with sodium hydroxide, add 0.3mL-3mL of defoamer, 0.15g-1.5g of preservative, and obtain a homogeneous slurry that is the label adhesive .

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PUM

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Abstract

The invention belongs to the technology application field of adhesive and particularly relates to a preparation method of a waterproof label adhesive. The preparation method comprises the following steps: mixing a certain amount of polyvinyl alcohol, emulsified silicon oil and water to fully stir, heating and dissolving to obtain polyvinyl alcohol solution, adding initiator; mixing a certain amount of acrylic acid, butyl acrylate, styrene, acrylamide, ammonium persulfate and water, emulsifying to obtain emulsion; then slowly adding the emulsion in the polyvinyl alcohol solution, heating, keeping the temperature, then cooling to the room temperature; and finally adding zinc oxide and sodium hydroxide, fully stirring, adjusting the pH value to 6-7 and adding defoaming agent and preservativeto obtain homogeneous paste, namely the label adhesive. The adhesive has the advantages of ice water resistance, low cost and the like.

Description

technical field [0001] The invention relates to a water-resistant label adhesive and a preparation method thereof, belonging to the field of adhesive technology application. Background technique [0002] At present, the trademark glue used in the packaging of glass bottled products in my country includes starch, polyvinyl formal, and casein glue. With the development of the domestic beer industry, the past starch and polyvinyl formal trademark adhesives have disadvantages such as low bonding strength, easy to mildew, poor water resistance, and not suitable for storage in freezers. [0003] In addition, the production speed of the beer line also requires the label adhesive to have excellent initial tack and high-speed workability. Both starch-based and polyvinyl alcohol-based adhesives cannot meet the requirements of high-speed production. Therefore, beer manufacturers at home and abroad are gradually turning to casein-based adhesives. mixture. Casein-based adhesives have g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J151/00C09J11/04
Inventor 邓超陈敬华胡准
Owner JIANGNAN UNIV