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High-oxygen-barrier no-primer polyvinyl alcohol coated film and manufacturing method thereof

A polyvinyl alcohol coating and polyvinyl alcohol technology, applied in the field of new environmentally friendly polymers, can solve the problems of poor oxygen barrier performance and adhesion performance, immature water-based polyurethane technology, and affecting the health of operators. The effect of reducing the investment of supporting equipment and manpower and material resources, excellent oxygen barrier performance, and improving comprehensive competitiveness

Inactive Publication Date: 2015-10-07
HAINAN SHINER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in terms of technology, the traditional coating method of polyvinyl alcohol coating needs to pre-coat solvent-based or water-based polyurethane primer, and then apply polyvinyl alcohol coating. The solvent-based polyurethane primer process involves the use of solvents, which is not only harmful to the environment It will cause pollution and affect the health of operating workers, while the technology of water-based polyurethane is not mature enough and the cost is high
Although there is currently a primerless polyvinyl alcohol coated film (such as patent ZL201010177656.2), which can directly coat a polyvinyl alcohol coating on a substrate without a primer, but its oxygen barrier performance and adhesion performance are not very good. Unable to meet the packaging requirements of foods that require high oxygen barrier properties

Method used

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  • High-oxygen-barrier no-primer polyvinyl alcohol coated film and manufacturing method thereof
  • High-oxygen-barrier no-primer polyvinyl alcohol coated film and manufacturing method thereof
  • High-oxygen-barrier no-primer polyvinyl alcohol coated film and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Substrate: BOPP, thickness 21μm.

[0032] Self-adhesive polyvinyl alcohol emulsion: composed of 21kg polyvinyl alcohol, 0.6kg N-methallylamine, 2.4kg brominated bisphenol A epoxy resin, 16g xylene sulfonic acid, 2g silicone defoamer, 174kg Ionized water made;

[0033] Weigh 21kg of polyvinyl alcohol and 174kg of deionized water, mix and stir at a stirring speed of 80 rpm, heat to 97°C, add 2g of silicone defoamer after constant temperature for 1 hour, cool down to 60°C, and slowly add 0.6kgN- Methallylamine, after the dropwise addition, the temperature was raised to 74°C for 2 hours at a constant temperature, 16g of xylenesulfonic acid and 2.4kg of brominated bisphenol A epoxy resin were added again, the temperature was kept at a constant temperature for 2 hours, and the stirring speed was 140°C. RPM, after cooling down to room temperature, filter and discharge the material, to be used in the next process.

[0034] Modified self-adhesive polyvinyl alcohol solution: pr...

Embodiment 2

[0038] Substrate: BOPP, thickness 28μm.

[0039] Self-adhesive polyvinyl alcohol emulsion: composed of 24kg polyvinyl alcohol, 0.8kg N-methallylamine, 2.6kg brominated bisphenol A epoxy resin, 20g xylene sulfonic acid, 4g silicone defoamer, 172kg Modified by ionized water;

[0040] Weigh 24kg of polyvinyl alcohol and 172kg of deionized water, mix and stir at a stirring speed of 100 rpm, heat to 95°C, add 4g of silicone defoamer after constant temperature for 1 hour, cool down to 55°C, and slowly add 0.8kgN- Methallylamine, after the dropwise addition, the temperature was raised to 75°C for 2 hours at a constant temperature, 20g of xylenesulfonic acid and 2.6kg of brominated bisphenol A epoxy resin were added again, and the temperature was kept at a constant temperature for 1.5 hours, fully stirred at a stirring speed of 120 RPM, after cooling down to room temperature, filter and discharge the material, to be used in the next process.

[0041] Modified self-adhesive polyvinyl...

Embodiment 3

[0045] Substrate: PET with a thickness of 12 μm.

[0046] Self-adhesive polyvinyl alcohol emulsion: composed of 26kg polyvinyl alcohol, 1kg N-methallylamine, 2.6kg brominated bisphenol A epoxy resin, 30g xylene sulfonic acid, 4g silicone defoamer, 170.36kg Prepared by ion water modification;

[0047] Weigh 26kg of polyvinyl alcohol and 170.36kg of deionized water, mix and stir at a stirring speed of 120 rpm, heat to 96°C, add 4g of silicone defoamer after constant temperature for 1.5 hours, cool down to 50°C, and slowly add 1kgN- Methallylamine, after the dropwise addition, the temperature was raised to 73°C for 1.5 hours at a constant temperature, 30g of xylenesulfonic acid and 2.6kg of brominated bisphenol A epoxy resin were added again, and the temperature was kept at a constant temperature for 1.5 hours, fully stirred at a stirring speed of 110 RPM, after cooling down to room temperature, filter and discharge the material, to be used in the next process.

[0048] Modifie...

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Abstract

The invention provides a high-oxygen-barrier no-primer polyvinyl alcohol coated film. The high-oxygen-barrier no-primer polyvinyl alcohol coated film comprises a substrate and a modified polyvinyl alcohol coating layer on the surface of the substrate, wherein the coating layer is a coating layer formed by coating modified self-adhesive polyvinyl alcohol solution on the surface of the substrate and then drying the substrate, and the modified self-adhesive polyvinyl alcohol solution is prepared by using the following raw materials in content by weight: 90-95 percent of self-adhesive polyvinyl alcohol emulsion, 0.5-3 percent of smoothing agent and 4.5-7 percent of anti-sticking agent; the self-adhesive polyvinyl alcohol emulsion is prepared by using the following raw materials in content by weight: 10.4-15 percent of polyvinyl alcohol, 0.3-0.8 percent of N-methylallylamine, 1.2-1.5 percent of epoxy resin, 0.008-0.03 percent of catalyst, 0.001-0.004 percent of defoaming agent and 83-88 percent of deionized water. The coated film has excellent oxygen barrier performance and adhesive force.

Description

Technical field [0001] The invention relates to a polyvinyl alcohol coated film with high oxygen resistance and bottomless glue and a manufacturing method thereof, and belongs to the field of novel environment-friendly polymers. Background technique [0002] At present, the high oxygen barrier packaging materials on the market mainly include polyvinylidene chloride (PVDC), ethylene-vinyl alcohol copolymer (EVOH) and polyvinyl alcohol (PVOH). With the increase of packaging functions in the market and the improvement of environmental protection awareness, the cost performance of product costs is becoming more and more important. Among the materials in the field of plastic flexible packaging, polyvinyl alcohol is one of the materials with the best oxygen barrier properties found so far, and it is a barrier material that can directly contact food. Polyvinyl alcohol coating film is a product with high technological content and high added value. No toxic substances are released i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C09D129/04C09D163/00C09D7/12
Inventor 黄宏存朱清梅朱海
Owner HAINAN SHINER IND