High-barrier PVA-based composite film and preparation method thereof

A high-barrier, composite film technology, applied in the field of packaging film materials, can solve problems such as swelling and film performance degradation, and achieve the effect of increased internal friction, high mechanical properties, and less relative slippage

Inactive Publication Date: 2019-01-22
王晚秀
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the PVA film has good mechanical properties and gas barrier properties in a dry state, when it is in a humid or wa

Method used

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  • High-barrier PVA-based composite film and preparation method thereof

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Effect test

Embodiment 1

[0021] A high-barrier PVA-based composite film, the following components are weighed by weight: 20 parts of corn starch, 50 parts of PVA, 10 parts of modified hydrotalcite, 30 parts of keratin solution, 10 parts of sodium carboxymethyl cellulose, polyethylene glycol 15 parts of diol, 3 parts of crosslinking agent, 10 parts of trimethylolpropane, 100 parts of water;

[0022] The modification method of hydrotalcite is as follows: add hydrotalcite to 50% ethanol aqueous solution, heat to 60°C, stir at constant temperature for 2 hours, then add potassium lauryl ether phosphate, adjust pH to 4, and react at 60°C 4h, it can be filtered, washed and dried, wherein the mass ratio of hydrotalcite to potassium lauryl ether phosphate is 5:1;

[0023] Further, the crosslinking agent is a mixture of boric acid, polyethylene glycol diglycidyl ether and glutaraldehyde, the mass ratio of which is 1:2:2.

[0024] The preparation method of above-mentioned a kind of high barrier property PVA bas...

Embodiment 2

[0030] A high-barrier PVA-based composite film, the following components are weighed by weight: 30 parts of cornstarch, 40 parts of PVA, 20 parts of modified hydrotalcite, 50 parts of keratin solution, 20 parts of sodium carboxymethylcellulose, polyethylene glycol 5 parts of diol, 10 parts of crosslinking agent, 3 parts of glycerin, 150 parts of water;

[0031] The modification method of hydrotalcite is as follows: add hydrotalcite to 50% ethanol aqueous solution, heat to 60°C, stir at constant temperature for 2 hours, then add potassium lauryl ether phosphate, adjust pH to 4, and react at 60°C 4h, it can be filtered, washed and dried, wherein the mass ratio of hydrotalcite to potassium lauryl ether phosphate is 4:1;

[0032] Further, the crosslinking agent is a mixture of boric acid, polyethylene glycol diglycidyl ether and glutaraldehyde, the mass ratio of which is 1:1:2.

[0033] The preparation method of above-mentioned a kind of high barrier property PVA base composite f...

Embodiment 3

[0039] A high-barrier PVA-based composite film, the following ingredients are weighed in parts by weight: 22 parts of corn starch, 48 parts of PVA, 12 parts of modified hydrotalcite, 35 parts of keratin solution, 12 parts of sodium carboxymethyl cellulose, polyethylene glycol 12 parts of diol, 7 parts of crosslinking agent, 8 parts of trimethylolpropane, 120 parts of water;

[0040] The modification method of hydrotalcite is as follows: add hydrotalcite to 50% ethanol aqueous solution, heat to 60°C, stir at constant temperature for 2 hours, then add potassium lauryl ether phosphate, adjust pH to 4, and react at 60°C 4h, it can be filtered, washed and dried, wherein the mass ratio of hydrotalcite to potassium lauryl ether phosphate is 5:1;

[0041] Further, the crosslinking agent is a mixture of boric acid, polyethylene glycol diglycidyl ether and glutaraldehyde, the mass ratio of which is 1:2:1.

[0042] The preparation method of above-mentioned a kind of high barrier propert...

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Abstract

The invention provides a high-barrier PVA-based composite film, which comprises the following components (by weight): 20-30 parts of corn starch, 40-50 parts of PVA, 10-20 parts of modified hydrotalcite, 30-50 parts of a keratin solution, 10-20 parts of sodium carboxymethylcellulose, 5-15 parts of polyethylene glycol, 3-10 parts of a cross-linking agent, 3-10 parts of a plasticizer, and 100-150 parts of water. Since the modified hydrotalcite layer has a high degree of encapsulation of molecular chains of matrixes, the polyvinyl alcohol molecular chain is difficult to diffuse into the water, thus achieving the effect of fixing the matrix. And since the cross-linking effect between various matrix substances also blocks the diffusion of water molecules, the mechanical properties of the composite material are maintained at a high level.

Description

technical field [0001] The invention relates to a packaging film material, in particular to a high-barrier PVA-based composite film and a preparation method thereof. Background technique [0002] Food packaging is the last link in modern food production. It should not only facilitate storage and transportation, but also protect food quality and hygiene, thereby extending shelf life and increasing commodity value. With the strengthening of people's awareness of environmental protection, more and more people begin to pay attention to green environmental protection, and require green packaging for food packaging materials. Green packaging can also be called pollution-free packaging and environmentally friendly packaging, which refers to packaging that is harmless to the ecological environment and human health, can be reused and recycled, and is in line with sustainable development. Polyvinyl alcohol (PVA) is a hydrophilic polymer with a carbon chain as its main chain and a lar...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L3/02C08L89/00C08L1/28C08L71/02C08K13/06C08K9/04C08K3/26C08J5/18
CPCC08J5/18C08J2329/04C08J2389/00C08J2403/02C08J2471/02C08J2489/00C08K3/26C08K9/04C08K13/06
Inventor 王晚秀
Owner 王晚秀
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