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High speed water resistant metal label glue and its preparation method

A metal label and label glue technology, which is applied in the preparation of animal glue or gelatin, adhesives, adhesive types, etc., can solve the problems of unfavorable application in food packaging, inability to satisfy beer ice, poor ability to withstand ice water, etc. , to achieve the effect of low production cost, easy high temperature alkali cleaning and fast curing speed

Inactive Publication Date: 2008-02-06
上海天之冠可再生能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest defect of polyvinyl alcohol glue is its poor ability to withstand ice water, especially for pasting metal labels, which cannot meet the needs of cold beer; for this reason, polyvinyl alcohol is treated with formal to produce polyvinyl formal label glue. This improves the water resistance to a certain extent, but the formaldehyde in the glue is not completely polycondensed, and a considerable part of it often exists in a free state, which gradually emits to the surroundings during the use of the product, pollutes the environment, and is unfavorable for food packaging.
Casein gum is green and environmentally friendly, and its performance is particularly excellent. However, due to the large proportion of casein, the main raw material in the formula, the cost of casein gum remains high, which limits its wider application and promotion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 6g of polyvinyl alcohol to the reaction kettle, add 28mL of water, insulate and stir in a water bath at 98°C for 40min, cool down, add 16g of urea and 30mL of water, and when the temperature of the reaction kettle drops to 78°C, add 8g of cheese Vegetables, 5g of cornstarch, 1.0g of zinc sulfate and 0.4g of sodium carbonate, heat preservation and stirring for 120min, when the temperature drops to 35°C, add 5g of wheat gluten and stir until it becomes a homogeneous slurry, then add n-butyl Alcohol 0.2mL, sodium benzoate 0.4g, stir well and serve as product. Product appearance: light yellow viscous liquid, pH: 7.0, viscosity (30±0.5°C): 68000mPa·s, non-volatile content 40%, curing speed: fiber tearing within 30s, resistance to 4°C ice water persistence h≥ 72.

Embodiment 2

[0016] Add 3g of polyvinyl alcohol to the reaction kettle, add 20mL of water, insulate and stir in a water bath at 98°C for 40min, cool down, add 20g of urea and 30mL of water, and when the temperature of the reaction kettle drops to 60°C, add 15g of cheese Vegetables, 7g of cornstarch, 1.6g of zinc sulfate and 0.8g of sodium carbonate, heat preservation and stirring for 120min, when the temperature drops to 40°C, add 2g of wheat gluten and stir to form a homogeneous slurry, then add n-butyl Alcohol 0.4mL, sodium benzoate 0.2g, stir well and serve as product. Product appearance: light yellow viscous liquid, pH: 8.2, viscosity (30±0.5°C): 87000mPa·s, non-volatile matter content 48%, curing speed: fiber tearing within 30s, resistance to 4°C ice water persistence h≥ 72.

Embodiment 3

[0018] Add 10g of polyvinyl alcohol to the reaction kettle, add 40mL of water, insulate and stir in a water bath at 98°C for 40min, cool down, add 13g of urea and 24mL of water, and when the temperature of the reaction kettle drops to 70°C, add 2g of corn Starch, 0.4g of zinc sulfate and 0.6g of sodium carbonate, heat preservation and stirring for 120min, when the temperature drops to 35°C, add 10g of wheat gluten powder and stir to form a homogeneous slurry, then add 0.01mL of n-butanol, benzene Sodium formate 0.02g, stir well and serve as product. Product appearance: yellow viscous liquid, pH: 7.5, viscosity (30±0.5°C): 31000mPa·s, non-volatile content 36%, curing speed: fiber tearing within 30s, resistance to 4°C ice water persistence h≥72 .

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Abstract

The invention discloses high speed waterproof metal label adhesive and its manufacturing method. It includes the following steps (as weight percentage): stirring 3-10% polyvinyl alcohol and 20-40% water in water bath over 95 centigrade degree for 40min; cooling; adding 12-20% urea and 25-30% water; keeping the temperature at 60-80 centigrade degree; adding 0-16% casein, 2-8% corn starch, 0.4-1.6% zinc sulfate, and 0.2-0.8% sodium carbonate to stir for 120min; cooling to under 45 centigrade degree; adding 2-10% wheat gluten powder to stir uniformly. It can solve the problems of bad ice waterproof and high cost.

Description

technical field [0001] The invention relates to a label glue and a preparation method thereof, in particular to a high-speed water-resistant metal label glue and a preparation method thereof. Background technique [0002] High-speed water-resistant label glue is mainly used in the labeling of food, medicine, pesticide and other industries. In particular, wine bottles in the food industry require a large amount of high-quality trademark glue. With the rapid development of my country's beer industry, beer manufacturers have adopted advanced packaging lines, and the speed of many labeling machines has increased to more than 20,000 bottles per hour, which requires a large number of high initial adhesion, fast curing speed, Label adhesive with good fluidity and excellent performance. At present, the domestic adhesives used for fast labeling of beer mainly include polyvinyl alcohol and casein series adhesives. The biggest defect of polyvinyl alcohol glue is its poor ability to w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J189/00C09J103/02C09J129/04
Inventor 王良东杜风光史吉平董青山
Owner 上海天之冠可再生能源有限公司
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