Production method of modified casein label adhesive

A production method and casein technology are applied in the preparation of animal glue or gelatin, adhesives, adhesive types, etc., and can solve the problems of poor water resistance of label glue, high cost of casein glue A, and inability to meet demand, etc. Water resistance, excellent ice water resistance time, and the effect of improving ice water resistance

Inactive Publication Date: 2010-12-29
NORTHWEST NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] Because the above-mentioned label glues all have shortcomings such as poor water resistance, slow drying speed, and cannot meet the needs of industrialized high-speed labeling machines, there are also people who directly produce casein-type glue.
Casein glue is a new environment-friendly polymer adhesive, non-toxic, tasteless, odorless, with high initial tack, fast curing speed, strong cohesive force, excellent ice water resistance and moisture resistance, suitable for For high-speed labeling machines, but the cost of casein glue A is too high for industrial applications
At the same time, most of the glues on the existing market contain heavy metal toxic ions, such as lead sulfate, lead acetate and other lead poisonous and easily polluting substances, which are easy to pollute the environment

Method used

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  • Production method of modified casein label adhesive

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Effect test

Embodiment 1

[0042] Embodiment 1 A kind of production method of modified casein label glue, comprises the following steps:

[0043] (1) Add polyvinyl alcohol into a four-necked flask filled with distilled water, place it in a heat-regulating electric heating mantle, stir and raise the temperature to 90°C to completely dissolve the polyvinyl alcohol, keep it warm for 50-60 minutes, and then cool down to 70°C °C to obtain a polyvinyl alcohol solution. Wherein the mass ratio of polyvinyl alcohol to water is 1:3.8.

[0044] (2) Put borax and casein in a beaker containing distilled water, heat and stir at 60°C for 30-35 minutes with a heat-adjusting electric heating mantle to fully dissolve them in water to obtain a casein solution; keep warm for later use . Wherein the mass ratio of borax to water is 1:29, and the mass ratio of casein to water is 1:4.

[0045] (3) putting cornstarch and water in distilled water at a temperature of 80°C in a mass ratio of 1: 1.2, and stirring constantly for ...

Embodiment 2

[0051] Embodiment 2 A kind of production method of modified casein label glue, comprises the following steps:

[0052] (1) Add polyvinyl alcohol into a four-neck flask filled with distilled water, place it in a heat-regulating electric heating mantle, stir and raise the temperature to 93°C to completely dissolve the polyvinyl alcohol, keep it warm for 50-60min, then cool down to 73°C °C to obtain a polyvinyl alcohol solution. Wherein the mass ratio of polyvinyl alcohol to water is 1:4.2.

[0053] (2) Put borax and casein in beakers containing distilled water, respectively, and stir at 63° C. for 30 to 35 minutes with a heat-regulating electric heating mantle to fully dissolve them in water to obtain a casein solution; keep warm for later use. The mass ratio of borax to water is 1:30, and the mass ratio of casein to water is 1:4.5.

[0054] (3) putting cornstarch and water in distilled water at a temperature of 83°C in a mass ratio of 1: 1.3, and stirring constantly for gelat...

Embodiment 3

[0060] Embodiment 3 A kind of production method of modified casein label glue, comprises the following steps:

[0061] (1) Add polyvinyl alcohol into a four-neck flask filled with distilled water, place it in a heat-adjusting electric heating mantle, stir and raise the temperature to 95°C to completely dissolve the polyvinyl alcohol, keep it warm for 50-60 minutes, and then cool down to 75°C °C to obtain a polyvinyl alcohol solution. Wherein the mass ratio of polyvinyl alcohol to water is 1:4.5.

[0062] (2) Put the borax and casein in a beaker containing distilled water respectively, and stir at 65° C. for 30 to 35 minutes with a heat-regulating electric heating mantle to fully dissolve them in water to obtain a casein solution; keep warm for later use. The mass ratio of borax to water is 1:31, and the mass ratio of casein to water is 1:5.

[0063] (3) putting cornstarch and water in distilled water at a temperature of 85°C in a mass ratio of 1:1.5, and stirring constantly ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J129/04C09J189/00C09J103/02
Inventor 查飞许云峰郭效军
Owner NORTHWEST NORMAL UNIVERSITY
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