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High-barrier functional PVA coating liquid as well as preparation method and application thereof

A functional, coating liquid technology, used in coatings, antifouling/underwater coatings, polyurea/polyurethane coatings, etc., can solve problems such as inability to meet demand

Active Publication Date: 2019-05-14
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, single-component PVA packaging materials cannot meet the market's demand for high-barrier PVA coating materials

Method used

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  • High-barrier functional PVA coating liquid as well as preparation method and application thereof
  • High-barrier functional PVA coating liquid as well as preparation method and application thereof
  • High-barrier functional PVA coating liquid as well as preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0033] The present invention also provides a preparation method for the high-barrier functional PVA coating solution described in the above technical solution, comprising the following steps:

[0034] Mix PVA, functional substances, processing aids and water to obtain a high-barrier functional PVA coating liquid.

[0035] In the present invention, the order of mixing is preferably to add functional substances into PVA first, and then add water and processing aids in sequence. The present invention has no special limitation on the mixing method, and conventional mixing methods in the field can be used, specifically, mechanical stirring.

[0036] In the present invention, after the sequential addition of water and processing aids is completed, water is preferably added to adjust the concentration of PVA in the PVA coating solution. In the present invention, the concentration of the PVA is preferably 2%-30%.

[0037] The present invention also provides the application of the hi...

Embodiment 1

[0040] The following components by weight were weighed to prepare a high-barrier functional PVA coating liquid, and the specific components by weight are shown in Table 1.

[0041] Component parts by weight of high barrier functional PVA coating solution in Table 1 Example 1

[0042] components

[0043] First add ginseng extract to PVA, add water during stirring, dissolve, add water-based polyurethane and ethanol in turn, and finally add water again, adjust the concentration of PVA to 2%, and prepare a high-barrier functional PVA coating liquid.

Embodiment 2

[0045] In order to investigate the anti-oxidation performance of the coating liquid, take the DPPH free radical scavenging function as the evaluation index, on the basis of the formula composition and preparation method of Example 1, keep other compositions unchanged, and set parallel The experimental group, experimental group settings and experimental results are shown in Table 2:

[0046] Table 2 The results of scavenging DPPH free radicals in high-barrier functional PVA coating solutions prepared by adding different functional substances

[0047] Coating solution number

[0048] As can be seen from Table 2, the DPPH free radical scavenging ability of the PVA coating solution without functional substances is only 1.31%, almost no anti-oxidation ability, and after adding functional substances, the scavenging ability of DPPH free radicals is greatly improved. Among them, except the DPPH free radical scavenging ability of the F coating liquid is 34.23%, the DPPH free ...

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Abstract

The invention provides high-barrier functional PVA coating liquid as well as a preparation method and application thereof, and belongs to the technical field of packing materials. The high-barrier functional PVA coating liquid comprises the following components in parts by weight: 2 to 30 parts of PVA, 4 to 10 parts of functional materials, 4 to 10 parts of a processing aid, and 50 to 90 parts ofwater, wherein the functional materials comprise one or more of astragalus membranaceus extract, schisandra chinensis extract, rhus chinensis extract, panax ginseng extract, fallopia multiflora extract and a food deoxidant. The PVA coating liquid has the advantages that all the material components have combined action, has excellent oxygen barrier property, oxidation resistance and bonding property, and can effective barrier and eliminate oxygen around food, inhibit the growth rate of microorganism coenobium in packing bags, and prevent rancidity and mildewing of food in the packing bags.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a high-barrier functional PVA coating liquid and a preparation method and application thereof. Background technique [0002] For foods with high oil content, such as meat, pastries and dried fruits, oil rancidity and mildew are prone to occur during transportation and storage, resulting in great loss and waste. Therefore, it is necessary to develop antioxidant Packaging materials for storage and preservation of foods with high fat content. In order to better prevent food from oxidative rancidity, the first solution is to isolate oxygen, which requires the packaging material itself to have excellent oxygen barrier properties. [0003] At present, the high barrier packaging materials on the market mainly include aluminum foil, polyvinylidene chloride (PVDC), ethylene-vinyl alcohol copolymer (EVOH) and polyvinyl alcohol (PVA). Among them, PVA is a degradable material th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D129/04C09D133/04C09D175/04C09D5/14C09D7/63
Inventor 李立陈昌杰杜云飞
Owner SHANGHAI OCEAN UNIV
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