Oxygen barrier coating for packaging material and preparation method of oxygen barrier coating

A packaging material and oxygen barrier technology, which is applied in the field of food packaging, can solve the problems of water resistance and barrier properties that are not ideal, cannot meet the needs of consumers, and reduce mechanical strength. The effect of oxygen barrier properties

Pending Publication Date: 2021-12-21
QINGDAO UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The excellent performance of PVA makes it have broad application prospects and can be used as an effective substitute for traditional food packaging, but its water resistance and barrier properties are not very ideal. The higher the moisture, the worse its barrier properties, and will Reduce its mechanical strength and cannot meet the needs of consumers. These factors limit the application of PVA in food packaging materials to a certain extent. Therefore, in practical applications, PVA needs to be properly processed to improve its performance.

Method used

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  • Oxygen barrier coating for packaging material and preparation method of oxygen barrier coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment proposes an oxygen barrier coating for packaging materials, and its raw materials are composed of: PVA 8g, glycerin 0.08g, melamine resin 0.16g; prepared by scraping film, and the specific preparation steps are as follows:

[0027] S1: add PVA into 100 mL of deionized water, stir to dissolve, add glycerin, sonicate in an ultrasonic machine for 5 min, vacuum defoaming, add melamine resin, stir evenly, ultrasonically sonicate for 5 min in an ultrasonic machine, and vacuum defoaming to obtain a PVA solution;

[0028] S2: The PVA solution is evenly coated on the surface of the PTFE plate with a measuring rod on the film scraper, the size of the measuring rod is 20 μm, the number of coating layers is 3, and the coating weight is 13 g / m 2 ;

[0029] S3: The obtained material is placed in an oven to dry, and the film is peeled off to obtain the final product.

Embodiment 2

[0031] This example proposes an oxygen barrier coating for packaging materials, the raw material of which is composed of: PVA 8g, starch 2g, glycerin 0.08g, melamine resin 0.16g; it is prepared by scraping the film, and the specific preparation steps are as follows:

[0032] S1: Add starch into 100 mL of deionized water and stir to gelatinize at 80°C, add PVA into it, stir to dissolve, add glycerin, ultrasonicate for 5 minutes in an ultrasonic machine, vacuum defoaming, add melamine resin, stir evenly, and then put it in an ultrasonic machine Ultrasonic 5min, vacuum defoaming, obtain PVA solution;

[0033] S2: The PVA solution is evenly coated on the surface of the PTFE plate with a measuring rod on the film scraper, the size of the measuring rod is 20 μm, the number of coating layers is 3, and the coating weight is 13 g / m 2 ;

[0034] S3: The obtained material is placed in an oven to dry, and the film is peeled off to obtain the final product.

Embodiment 3

[0036] This example proposes an oxygen barrier coating for packaging materials, the raw material of which is composed of: PVA 9g, starch 2g, polyethylene glycol 0.27g, illite 0.45g; it is prepared by scraping film, and the specific preparation steps are as follows :

[0037] S1: Add starch into 200 mL of deionized water and stir to gelatinize at 80 °C, add PVA into it, stir to dissolve, add polyethylene glycol, sonicate for 5 minutes in an ultrasonic machine, vacuum defoaming, add illite, stir evenly, and then sonicate Ultrasonic in the machine for 5min, vacuum defoaming to obtain PVA solution;

[0038] S2: The PVA solution is evenly coated on the surface of the PTFE plate with a measuring rod on the film scraper, the size of the measuring rod is 20 μm, the number of coating layers is 2, and the coating weight is 9 g / m 2 ;

[0039] S3: The obtained material is placed in an oven to dry, and the film is peeled off to obtain the final product.

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Abstract

The invention belongs to the technical field of food packaging, and particularly relates to an oxygen barrier coating for a packaging material and a preparation method of the oxygen barrier coating. The oxygen barrier coating for the packaging material comprises the following raw materials in parts by weight: 100 parts of polyvinyl alcohol PVA, 0-50 parts of starch, 2-30 parts of a functional additive and 0.5-10 parts of a plasticizer. According to the invention, PVA / starch is used as a substrate material, a functional auxiliary agent and a plasticizer are added, and the oxygen barrier coating for the packaging material is prepared in a tape casting or film scraping manner. The preparation method disclosed by the invention is simple and easy to operate, and the prepared oxygen barrier coating for the packaging material can effectively improve the oxygen barrier property, oil-proof property and mechanical property of the packaging material, and has high wear resistance and surface smoothness at the same time.

Description

technical field [0001] The invention relates to the technical field of food packaging, in particular to an oxygen barrier coating for packaging materials and a preparation method thereof. Background technique [0002] In the current food packaging industry, although the commonly used polymer materials such as PVDC, EVOH, and PAN have excellent barrier properties, they have the disadvantages of high cost and poor processing performance. Serious damage to the quality of the packaging. Moreover, such packaging materials have problems such as being difficult to degrade and threatening the environment. How to solve them is a serious problem that is currently being paid attention to. [0003] PVA is a good polymer matrix. As an environmentally friendly biodegradable polymer, it has good water solubility, film-forming properties and mechanical strength, and has certain barrier properties. Oil starch, without affecting the performance of PVA, can reduce the cost while improving th...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L3/02C08L61/28C08L71/02C08L33/00C08L63/00C08L91/00C08K5/053C08K3/34C08K5/11C08K5/1539C08K3/28C08K3/04C08K3/36C08K3/22C08J5/18
CPCC08J5/18C08J2329/04C08J2403/02C08J2461/28C08J2471/02C08J2433/00C08J2463/00C08J2491/00C08K5/053C08K3/34C08K3/346C08K5/11C08K5/1539C08K3/28C08K3/042C08K3/36C08K2003/2296C08K2201/011
Inventor 吉喆姜小凡许慧敏陈夫山王东兴邵学军孟尧宋晓明
Owner QINGDAO UNIV OF SCI & TECH
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