Biodegradable high-barrier paper-plastic packaging composite film and preparation method thereof

A biodegradable, high-barrier technology, applied in the field of packaging materials, can solve problems such as the need to control the degradation rate, increase the cost of raw materials, lack of elasticity and flexibility, achieve good printing performance and appearance, control production and processing costs, and good composite fastness. degree of effect

Active Publication Date: 2021-11-09
JIANGSU LEATER GREEN PACKAGING CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Although PLA has many advantages, there are also many shortcomings in practical applications: such as PLA's poor toughness, lack of elasticity and flexibility, hard texture and high brittleness, relatively low solution strength, and slow crystallization rate. Its application in many aspects
The chemical structure of PLA contains a large number of ester bonds, resulting in poor hydrophilicity, and the degradation rate needs to be controlled, etc.
Moreover, the high price of PLA increases the cost of raw materials and limits its commercial promotion.

Method used

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  • Biodegradable high-barrier paper-plastic packaging composite film and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The preparation method of the biodegradable high-barrier paper-plastic packaging composite film provided by the present invention comprises the following steps:

[0051] 1) According to the mass fraction, add 50 parts of PVA powder, 15 parts of plasticizer sorbitol and 3 parts of heat stabilizer laurate into 70 parts of deionized water at 90 ° C, mix well, and configure PVA solution; remove PVA solution Soak, cool down, filter and extrude to obtain a solution; apply the solution on the paper layer (2) at 40°C with a wet film thickness of 300 microns, dry at 60°C for 5 minutes, and heat press with a flattening roller Flatten the paper to obtain a barrier coating (3);

[0052] 2) Use gravure printing technology to print degradable water-based ink on the other side of the kraft paper;

[0053] 3) In parts by weight, add 55 parts of PLA particles and 1 part of bifunctional compatibilizer KT20 into the casting machine, mix for 20 minutes and then raise the temperature to 17...

Embodiment 2

[0056] The preparation method of the biodegradable high-barrier paper-plastic packaging composite film provided by the present invention comprises the following steps:

[0057] 1) According to the mass fraction, add 60 parts of PVA powder, 10 parts of plasticizer triethanolamine and 5 parts of heat stabilizer laurate into 60 parts of deionized water at 95 ° C, mix well, and configure PVA solution; PVA solution Extrude after defoaming, cooling, and filtering to obtain a solution; apply the solution on the paper layer (2) at 50°C with a wet film thickness of 400 microns, then dry it at 100°C for 1 minute, and heat it with a flattening roller. Flatten the paper to obtain a barrier coating (3);

[0058] 2) Use gravure printing technology to print degradable water-based ink on the other side of wood pulp paper;

[0059] 3) In parts by weight, add 58 parts of PLA particles and 2 parts of compatibilizer EsunBio5004K into the casting machine, mix for 30 minutes and then heat up to 17...

Embodiment 3

[0062] The preparation method of the biodegradable high-barrier paper-plastic packaging composite film provided by the present invention comprises the following steps:

[0063] 1) According to the mass fraction, 80 parts of PVA powder, 20 parts of plasticizer triethanolamine and 10 parts of heat stabilizer zinc stearate are added to 80 parts of deionized water at 80 ° C, mixed evenly, and configured into a PVA solution; PVA The solution is defoamed, cooled, filtered, and then extruded to obtain a solution; the solution is coated on the paper layer (2) at 60°C with a wet film thickness of 500 microns, then dried at 80°C for 3 minutes, and flattened with a flattening roller heat-pressed flattened paper to obtain a barrier coating (3);

[0064] 2) Use gravure printing technology to print degradable water-based ink on the other side of the glassine paper;

[0065] 3) In parts by weight, add 60 parts of PLA particles and 0.5 parts of BASF epoxy chain extender ADR 4468 into the casti...

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Abstract

The invention provides a biodegradable high-barrier paper-plastic packaging composite film and a preparation method thereof. The biodegradable high-barrier paper-plastic packaging composite film sequentially comprises an ink layer, a paper layer, a barrier coating, a bonding layer and a PLA layer from outside to inside, wherein the PLA layer is modified by a thermoplastic elastomer, and after modification, the temperature resistance and toughness of the PLA layer can be improved, heat sealing performance is ensured, and the packaging requirements of different contents and different weights are met; and the barrier coating can ensure that a final finished product has good barrier property and prolongs the shelf life of the contents. The biodegradable high-barrier paper-plastic packaging composite film has the advantages of being exquisite in printing appearance, good in display effect and the like, is made of degradable materials, can be biodegraded after being used, and is free of pollution to the environment.

Description

technical field [0001] The invention belongs to the field of packaging materials, and in particular relates to a biodegradable high-barrier paper-plastic packaging composite film and a preparation method thereof. Background technique [0002] Traditional plastic products have become common consumables in people's lives because of their lightness and low price. However, since plastic products are difficult to degrade, abandoned plastic products will bring serious harm to the environment, which is commonly known as "white pollution". According to an analysis by Kearney, only 8% of the world's plastic is currently recycled, with 8 million tonnes of plastic waste entering the ocean every year. About 30% of total global plastic use comes from packaging products, a figure that totaled 110 million tonnes in 2019. Plastic production is expected to grow significantly by 2050, when the figure is forecast to reach 700 million tonnes. If no countermeasures are taken, 644 million tons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B32B27/08B32B29/00B32B33/00B32B7/12B32B38/14B29C48/00B29C48/08C08L67/04C08L67/02C08L69/00
CPCB32B27/36B32B27/10B32B29/002B32B33/00B32B7/12B32B38/145C08L67/04B29C48/0021B29C48/08B65D65/40B32B2255/12B32B2255/26B32B2307/7163C08L2205/03C08L2201/06C08L2201/10C08L67/02C08L69/00Y02W90/10
Inventor 顾成周伟学孙宁李斌斌
Owner JIANGSU LEATER GREEN PACKAGING CORP LTD
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