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Method for preparing water soluble non-setting adhesive

A water-soluble, gelatin technology, applied in the field of self-adhesive, can solve the problems of not easy to peel off and clean, and achieve the effect of high peel strength, easy to obtain and abundant sources

Inactive Publication Date: 2013-01-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects that the stickers used in the existing trademarks or labels are not easy to peel off and clean after use, and develop a fully water-soluble sticker.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Gelatin 50Kg

[0029] Polyvinylpyrrolidone 3 Kg

[0030] Glycerol 30Kg

[0031] Formamide 3 Kg

[0032] Carbonamide 13.4 Kg

[0033] Sorbitan Laurate 0.5 Kg

[0034] Sodium Benzoate 0.1 Kg

[0035] After the above components are measured, use 300Kg of water to swell the gelatin in water at room temperature for 1 hour in a container with a vacuum dehydration and stirring device; then add glycerin, formamide, carbonamide, sorbitan lauryl according to the formula acid ester and sodium benzoate, and heat up the mixture to 60°C; at this time, the gelatin begins to dissolve in the water, start stirring, and stir until the gelatin and the added materials are completely dissolved in the water; add polyvinylpyrrolidone, and continue stirring until the polyvinyl The pyrrolidone is completely dissolved; seal the container well, keep the temperature in the container at 75°C, and turn on the vacuum dehydration device for dehydration; until the vacuum dehydration rate of the mix...

Embodiment 2

[0038] Gelatin 55Kg

[0039] Polyvinylpyrrolidone 5 Kg

[0040] Glycerol 15Kg

[0041] Ethylene glycol 10 Kg

[0042] Carbonamide 14.6Kg

[0043] Polyoxypropylene Stearate 0.3 Kg

[0044] Sodium sorbate 0.1 Kg

[0045] After the above components are measured, use 400Kg of water to swell the gelatin in water at room temperature for 2 hours in a container with a vacuum dehydration and stirring device; then add glycerol, ethylene glycol, carbonamide, polyoxypropylene hard Fatty acid ester and sodium sorbate, and the temperature of the mixture is raised to 70°C; at this time, the gelatin begins to dissolve in the water, start stirring, and stir until the gelatin and the added materials are completely dissolved in the water; add polyvinylpyrrolidone, and continue to stir until poly Vinylpyrrolidone is completely dissolved; seal the container well, keep the temperature in the container at 70°C, and turn on the vacuum dehydration device for dehydration; until the vacuum dehydrat...

Embodiment 3

[0048] Gelatin 58Kg

[0049] Polyvinylpyrrolidone 3 Kg

[0050] Glycerol 15Kg

[0051] Ethylene glycol 10 Kg

[0052] Formamide 5.6 Kg

[0053] Carbonamide 8Kg

[0054] Sorbitan Laurate 0.3 Kg

[0055] Sodium sorbate 0.1 Kg

[0056] After the above components are measured, use 450Kg of water to swell the gelatin in water at room temperature for 3 hours in a container with a vacuum dehydration and stirring device; Sorbitan laurate and sodium sorbate, and heat the mixture to 75°C; at this time, the gelatin begins to dissolve in the water, start stirring, and stir until the gelatin and the added materials are completely dissolved in the water; add polyvinylpyrrolidone, and continue stirring , until the polyvinylpyrrolidone is completely dissolved; seal the container well, keep the temperature in the container at 70°C, and turn on the vacuum dehydration device for dehydration; until the vacuum dehydration rate of the mixed material in the container reaches more than 98%, sto...

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Abstract

The invention relates to a method for preparing a water soluble non-setting adhesive. The method comprises the following steps of: swelling the gelatin in normal-temperature water in a container, adding an additive, heating the mixture, stirring to allow the gelatin and the additive to dissolve in water completely, adding polyvinyl pyrrolidone, and continuing stirring till the polyvinyl pyrrolidone dissolves completely; and sealing the container at last, keeping the temperature in the container, dewatering the product in a vacuum dewatering device, cooling the product, discharging the product to be stored. The soluble non-setting adhesive is suitable to be used on paper trademarks or tags, has characteristics of common non-setting adhesive and can be torn off and adhere repeatedly. The non-setting adhesive can quickly and completely dissolve in water without leaving any traces on materials to be adhered.

Description

technical field [0001] The invention relates to a self-adhesive suitable for paper or paper-plastic composite trademarks and labels, in particular to a preparation method of a water-soluble self-adhesive. Background technique [0002] With the increasing development of commodity packaging, the amount and quality of self-adhesives for trademarks and labels are increasingly demanding. The most common self-adhesives are generally water-based acrylic modified emulsions, which are coated on commodity or label substrates. Then it is dried. This kind of self-adhesive has the advantages of high initial adhesion and good holding force, so it has been widely used in commodities, labels and self-adhesive tapes. But this kind of self-adhesive has a fatal shortcoming that the pasted items are not easy to peel off after a long time of pasting, and it is not easy to wash and clean them even with detergent, so the pasted items are easy to leave dirt , thereby affecting the appearance and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J139/06C09J11/06
Inventor 崔跃飞
Owner SOUTH CHINA UNIV OF TECH
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