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Water-based coating paint for food packaging paper and preparation method of water-based coating paint

A food packaging paper, water-based coating technology, applied in paper coatings, textiles, papermaking, papermaking, etc., can solve the problems of complex components of water-based coating coatings, residual organic monomers and additives, poisonous and harmful, etc. Difficulty in making pulp and recycling, improving film-forming effect, and saving energy

Active Publication Date: 2022-07-15
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the synthesis process of acrylic resin, there will be a large amount of organic monomers and additives residues, these residues are poisonous and harmful, and will also produce peculiar smell
At the same time, this kind of water-based coating with polyacrylate as the main film-forming substance, in order to have stable performance and good coating effect, polymers such as polyurethane and polystyrene or their monomers will be added during the synthesis or compounding process. body, resulting in complex components of this type of water-based coating, there are a lot of toxic and harmful substances, not suitable for the production of coated paper for packaging in the food industry

Method used

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  • Water-based coating paint for food packaging paper and preparation method of water-based coating paint
  • Water-based coating paint for food packaging paper and preparation method of water-based coating paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 Preparation of coating coating of the present invention

[0024] 6Kg of dialdehyde starch, 11Kg of soybean protein isolate powder and 200Kg of water were added to the reaction vessel and stirred to disperse to form a mixed material. Then, flaky sodium hydroxide was added to the mixture, the pH value of the mixture was adjusted to 9, and the gelatinization reaction was carried out by heating under stirring conditions. The gelatinization reaction temperature was 85° C. and the time was 45 minutes. After the gelatinization reaction is completed, the reaction material is cooled to normal temperature, silica sol, 10Kg of silica sol with a solid content of 20wt%, pH value of 7, 0.25Kg of coupling agent KH560, stirring and mixing evenly, that is, it can be used for food packaging Waterborne coating for paper production. This coating is used to coat processed food and beverage paper, and the performance index of the obtained processed paper is shown in Table 1.

Embodiment 2

[0025] Example 2 Preparation of coating coating of the present invention

[0026] 4Kg of dialdehyde starch, 13Kg of soybean protein isolate powder and 200Kg of water were added into the reaction vessel and stirred to disperse to form a mixed material. Then add 30wt% sodium hydroxide solution to the mixture, adjust the pH value of the mixture to 9, and heat under stirring for gelatinization reaction, the gelatinization reaction temperature is 85°C, and the time is 45 minutes. After the gelatinization reaction is over, the material obtained from the reaction is cooled to room temperature, silica sol is added with 8Kg of silica sol with a solid content of 20wt%, pH value is 7, 0.25Kg of coupling agent KH560, stirred and mixed evenly, and it can be used for food packaging. Waterborne coating for paper production. This coating is used to process food and beverage paper, and the performance indexes of the obtained processed paper are shown in Table 1.

Embodiment 3

[0027] Example 3 Preparation of coating coating of the present invention

[0028] 3Kg of dialdehyde starch, 12Kg of soybean protein isolate powder and 200Kg of water were added to the reaction vessel and stirred to disperse to form a mixed material. Then, flaky sodium hydroxide was added to the mixture, the pH value of the mixture was adjusted to 9, and the gelatinization reaction was carried out by heating under stirring conditions. The gelatinization reaction temperature was 90° C. and the time was 30 minutes. After the gelatinization reaction is completed, the material obtained from the reaction is cooled to room temperature, silica sol, 8Kg of silica sol with a solid content of 20wt%, pH value of 7, and 0.2Kg of coupling agent KH560 are added, stirred and mixed evenly, that is, it can be used for food packaging Waterborne coating for paper production. This coating is used to process food and beverage paper, and the performance indexes of the obtained processed paper are s...

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Abstract

The invention belongs to the technical field of food packaging paper preparation, and particularly relates to a water-based coating for food packaging paper and a preparation method of the water-based coating. The water-based coating for the food packaging paper is prepared from the following raw materials in parts by weight: 3 to 10 parts of dialdehyde starch, 5 to 15 parts of soybean protein isolate powder, 200 parts of water, 5 to 15 parts of silica sol and 0.2 to 0.3 part of coupling agent KH560. The preparation method comprises the following steps: proportionally adding dialdehyde starch, soybean protein isolate powder and water into a reactor, uniformly stirring and mixing, adding sodium hydroxide to adjust the pH value, and heating for gelatinization; and after the gelatinization reaction is finished, cooling the gelatinized material to normal temperature, adding silica sol and a coupling agent, and uniformly mixing to obtain the water-based coating paint for producing food packaging paper and paperboards. The food packaging paper produced by the coating paint prepared by the invention is high in strength, good in water resistance, green and environment-friendly, and the preparation process is simple in process, low in cost and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of food packaging paper preparation, and in particular relates to an aqueous coating for food packaging paper and a preparation method thereof. Background technique [0002] With the release of my country's "Opinions on Further Strengthening the Control of Plastic Pollution", new restrictions on the use of plastic products in the catering industry have been put forward, and the control of plastic products in the catering industry has been further strengthened. Non-degradable disposable plastic straws, Plastic bags, disposable foam plastic lunch boxes and tableware will be banned nationwide one after another. At the same time, as a degradable and renewable resource, catering paper produced from plant fibers has become an important substitute for plastics. Paper straws, paper bags, and paper lunch box tableware have begun to appear in the market. However, paper straws and other food utensils produced from food...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/54D21H19/50D21H19/40D21H19/46D21H21/16
CPCD21H19/54D21H19/50D21H19/40D21H19/46D21H21/16Y02W90/10
Inventor 刘建容林华杨永彬郑小乐卿德淋
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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