Polyvinyl alcohol/polyethylene composite film and preparation method thereof

A technology of polyvinyl alcohol and composite film, applied in the direction of sustainable manufacturing/processing, bio-packaging, sustainable packaging, etc., can solve problems such as poor oxygen gas barrier properties, achieve great practical and promotional value, and have good environmental protection , high safety effect

Pending Publication Date: 2022-07-12
深圳市硕美包装材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is to provide a polyvinyl alcohol / polyethylene composite film and its preparation method, which solves the problem of poor oxygen gas barrier properties of the polyvinyl alcohol / polyethylene composite film prepared in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 0.1g of polyethylene raw material and add it to 100ml of isoparaffin solvent, ultrasonicate at 20°C, the ultrasonic power is 100W, and stir for 2h to obtain a polyethylene suspension; then add 0.1g of polyvinyl alcohol and polyvinyl alcohol to every 100ml of polyethylene suspension. 100ml of dispersing solvent, ultrasonic at 80°C, ultrasonic power of 100W, and stirring for 2h to fully dissolve the polyvinyl alcohol to obtain polyvinyl alcohol and polyethylene dispersion solution; use a glass rod to apply the obtained polyvinyl alcohol and polyethylene dispersion solution to the mold The surface of the polyethylene terephthalate film mold frame was cooled and dried at a rate of 5°C / 3h for 12h, so that the temperature was reduced from 50°C to 30°C, and finally the polyvinyl alcohol and polyethylene composite film was obtained by demolding.

[0027] The oxygen permeability coefficient of the existing polyethylene composite film containing polyethylene with a mass fract...

Embodiment 2

[0029] Take 0.05g of polyethylene raw material and add it to 50ml of isoparaffin solvent, ultrasonicate at 25°C, the ultrasonic power is 100W, and stir for 1.5h to obtain a polyethylene suspension; then add 0.05g of polyethylene to every 50ml of polyethylene suspension. Alcohol and 50ml of dispersing solvent, ultrasonic at 70°C, ultrasonic power is 100W, and stirring for 1.5h to fully dissolve polyvinyl alcohol to obtain polyvinyl alcohol and polyethylene dispersion solution; use a glass rod to coat the obtained polyvinyl alcohol and polyethylene dispersion solution To the surface of the polyethylene terephthalate film mold frame of the mold, cooling and drying at a rate of 5°C / 3h for 12h, the temperature was reduced from 50°C to 30°C, and finally the polyvinyl alcohol and polyethylene nanocomposite film was obtained by demolding .

[0030] The oxygen permeability coefficient of the existing polyvinyl alcohol / polyethylene composite film containing polyethylene with a mass frac...

Embodiment 3

[0032] Take 0.025g of polyethylene raw material and add it to 25ml of isoparaffin solvent, ultrasonicate at 30 °C, the ultrasonic power is 100W, and stir for 1 hour to obtain a polyethylene suspension; then add 0.025g of polyvinyl alcohol and 0.025g of polyvinyl alcohol and 25ml of dispersing solvent, ultrasonic at 90°C, ultrasonic power of 100W, and stirring for 1 hour to fully dissolve polyvinyl alcohol to obtain polyvinyl alcohol and polyethylene dispersion solution; use a glass rod to apply the obtained polyvinyl alcohol and polyethylene dispersion solution to the mold The surface of the polyethylene terephthalate film mold frame was cooled and dried at a rate of 5°C / 3h for 12h, so that the temperature was reduced from 50°C to 30°C, and finally the polyvinyl alcohol and polyethylene nanocomposite film was obtained by demolding.

[0033] The oxygen permeability coefficient of the existing polyvinyl alcohol / polyethylene composite film containing 0.25% polyethylene mass fracti...

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PUM

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Abstract

The invention discloses a polyvinyl alcohol / polyethylene composite film and a preparation method thereof, and the preparation method comprises the following steps: step 1, preparing a polyethylene suspension, specifically, adding a polyethylene raw material into an isoparaffin solvent, carrying out ultrasonic dissociation, and uniformly stirring; step 2, preparing a polyvinyl alcohol and polyethylene dispersion solution, specifically, adding polyvinyl alcohol powder and a dispersion solvent into the polyethylene suspension prepared in the step 1, and performing ultrasonic treatment and stirring to completely dissolve the polyvinyl alcohol powder; step 3, coating a mold and cooling and drying, specifically, coating the dispersion solution into the mold, and cooling and drying the mold for 12 hours at the speed of 5 DEG C / 3 hours at the temperature of 30-50 DEG C; and 4, demolding to obtain the polyvinyl alcohol / polyethylene composite film. The method disclosed by the invention is simple in process and low in cost, and has great practical and promotional values.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, in particular to a preparation method of a polyvinyl alcohol / polyethylene composite film. Background technique [0002] With the development of economy and the advancement of science and technology, polymer film materials have been more and more widely used in packaging industries such as food and medicine due to their excellent comprehensive properties. [0003] Polyvinyl alcohol is a water-soluble polymer, and it is also one of the few non-petroleum-based polymer materials that has been industrially produced and can be prepared from natural gas and coal. However, polyvinyl alcohol itself has low strength, poor heat resistance and other properties. This limits the application of polyvinyl alcohol and its composite materials in many fields. [0004] The molecular chain of polyvinyl alcohol contains a large number of hydroxyl groups, and there are many hydrogen bonds in the mo...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L23/06C08J5/18
CPCC08J5/18C08J2329/04C08J2423/06C08J2323/06C08J2429/04Y02W90/10
Inventor 穆在钦
Owner 深圳市硕美包装材料有限公司
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