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Method for fabricating obstruction coating film of modified polyvinyl alcohol and coating film produced thereby

A technology of polyvinyl alcohol and coating film, which is applied in the field of coating film for environmentally friendly flexible packaging, can solve the problems of health hazards for production personnel, high equipment maintenance costs, and inapplicability to small and medium-sized enterprises, and achieves wide application range, low equipment maintenance costs, Effect of low coat weight

Inactive Publication Date: 2005-10-26
HAINAN SHINER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (3) During the PVDC coating process, it will cause harm to the health of production personnel
This makes the current PVOH can not be directly used as a coating material for high-barrier flexible packaging films. At present, foreign countries have reported about the method of casting PVOH composite films, but this method has too high investment and equipment maintenance costs. It is also high, and the corresponding manufacturing cost is high, which is not suitable for small and medium-sized enterprises, and does not conform to my country's national conditions.
Therefore, there is no PVOH-type high-barrier flexible packaging coating film with practical application value at present.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 48 kg of PVOH raw material and put it into a 1000L reaction kettle. The reaction kettle is heated by electric heating, equipped with a thermometer, a leaf stirring rod and a reflux tube, slowly inject 618.2L of distilled water, stir rapidly at room temperature for 1 hour, and then Adjust the stirring speed to 150 rpm, start to heat up, control the temperature at 93°C-95°C, keep it warm for two hours, take out the sample, add two drops of potassium iodide solution dropwise, if there are no blue particles, it means the dissolution is complete. Allow to cool naturally, and when the temperature drops to 50°C, add 410ml of triethylamine dropwise, stir for 20 minutes, then add 5.1kg of ethylenediamine, keep at 50°C, adjust the stirring speed to 250 rpm, and take a sample to make a thin film after two hours of reaction. After the sample is qualified, let the system cool down to 45°C, add 5.0 kg of tributyl phosphate, 7.1 kg of sodium hexametaphosphate and 1.41 kg of butan...

Embodiment 2

[0034]Weigh 60 kg of PVOH raw material and put it into a 1000L reactor. The reactor is heated by electric heating. It is equipped with a thermometer, a leaf-type stirring rod and a reflux tube respectively. Slowly inject 606.7L of distilled water and stir rapidly at room temperature for 1 hour, then Adjust the stirring speed to 150 rpm, start to heat up, control the temperature at 93°C-95°C, keep it warm for two hours, take out the sample, add two drops of potassium iodide solution dropwise, if there are no blue particles, it means the dissolution is complete. Allow to cool naturally, and when the temperature drops to 60°C, add 500ml of triethylamine dropwise, stir for 20 minutes, then add 10.1kg of ethylenediamine, keep at 60°C, adjust the stirring speed to 250 rpm, and take a sample to make a thin film after two hours of reaction. After the sample is qualified, let the system cool to 35°C, add 4.01 kg of tributyl phosphate, 8.1 kg of sodium hexametaphosphate and 1.13 kg of 2,...

Embodiment 3

[0036] Weigh 70 kg of PVOH raw material and put it into a 1000L reactor. The reactor is heated by electric heating, equipped with a thermometer, a leaf-type stirring rod and a reflux tube, and slowly injects 596L of distilled water. Stir rapidly at room temperature for 1 hour, and then Adjust the stirring speed to 150 rpm, start to heat up, control the temperature at 93°C-95°C, keep it warm for two hours, take out the sample, add two drops of potassium iodide solution dropwise, if there is no blue particles, it means the dissolution is complete. Allow to cool naturally, and when the temperature drops to 60°C, add 580ml of 1,4-oxazepine dropwise, stir for 20 minutes, then add 13.5kg of urea, keep at 60°C, adjust the stirring speed to 250 rpm, and react for two Take a sample for thin-layer chromatography one hour later. After the sample is qualified, let the system cool to 35°C, add 4.22 kg of triethyl phosphate, 10.1 kg of sodium hexametaphosphate and 1.32 kg of 2,6-di-tert-buty...

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Abstract

The present invention provides a modified polyvinyl alcohol high-barrier coating film and its preparation method. Said method uses PVOH as raw material, and adopts the following steps: after the raw material is catalyzed, making modification, then adding adjuvant to make them into coating material, applying said coating material on the base film so as to form high-barrier coating film. After the PVOH molecular chain is partially catalyzed and condensed, the hydrogen bond action force in the molecular can be reduced, so that its water-proof property can be greatly raised.

Description

technical field [0001] The invention relates to an environmentally friendly flexible packaging coating film, which is a high barrier packaging film and a manufacturing method thereof, and is applied to the packaging of high-end food, medicine, cigarettes and other products. Background technique [0002] At present, the leading product of high-barrier flexible packaging materials is polyvinylidene chloride (PVDC, hereinafter referred to as PVDC) composite film, which is used in the packaging of high-end food, medicine, cigarettes and other products. PVDC molecules have good symmetry and are easy to form crystals. The molecules contain a large number of polar chlorine atoms, which greatly enhance the attraction between molecules, arrange them closely, and have inherently good barrier properties. But also because the PVDC molecule contains a large number of chlorine atoms, it also has the following disadvantages: [0003] (1) PVDC is not easy to decompose and degrade naturally...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D129/04
Inventor 王波黄宏存谢文波
Owner HAINAN SHINER IND
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