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A kind of polyvinyl acetate film and preparation method thereof

A polyvinyl acetate and film technology, applied in the field of polyvinyl acetate film and its preparation, can solve the problems of limited application range, poor water resistance and heat resistance, and achieve the effect of improving poor water resistance and heat resistance

Inactive Publication Date: 2016-08-24
HAINAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polyvinyl acetate emulsion, commonly known as "white latex", is mainly used in adhesives in the fields of textile, construction, light industry, papermaking, wood processing and automobiles. However, affected by the preparation process and product structure, polyvinyl acetate emulsion has The shortcomings of poor water resistance and heat resistance greatly limit its application range

Method used

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  • A kind of polyvinyl acetate film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Mix 80 parts of a mixture of polyethylene glycol and glycerin (the volume ratio of polyethylene glycol and glycerin is 4:1, and the molecular weight of polyethylene glycol is 400) and 7 parts of concentrated sulfuric acid in a three-necked flask. , heated up to 140°C under constant stirring, added 20 parts of banana pseudostem powder, and reacted at constant temperature for 120 minutes to obtain 100 parts of liquefied product; added 500 parts of polyvinyl acetate emulsion, and adjusted the mixed solution with a mass fraction of 5% sodium hydroxide solution Continue stirring for 30 minutes in a three-neck flask until pH = 2.0; pour the mixture into a smooth glass plate model, spread the film by casting method, cure at 100°C for 1.5 hours, rinse the cured film in ethanol After making, air dry.

[0034] Polyvinyl acetate film appearance: dark brown film

[0035] Technical indicators:

[0036] Water resistance: the structure will not be damaged after soaking in water for ...

Embodiment 2

[0052] The mixed solution of 80g polyethylene glycol and glycerol (the volume ratio of polyethylene glycol and glycerol is 4:1, wherein the molecular weight of polyethylene glycol is 400) and 7g concentrated sulfuric acid are mixed uniformly in the there-necked flask, constantly Heat up to 140°C under stirring, add 20g of banana pseudostem powder, and react at constant temperature for 120min to obtain 100g of liquefied product; add 1000g of polyvinyl acetate emulsion, and adjust the mixed solution to pH=2.0 with a mass fraction of 20% sodium hydroxide solution, Continue to stir in the three-neck flask for 30 minutes; pour the mixture into a smooth glass plate model, spread the film by casting method, and cure it at 100°C for 2.5 hours. Rinse the cured film in ethanol, take it out, and air-dry it.

[0053] Polyvinyl acetate film appearance: dark brown film

[0054] Technical indicators:

[0055] Water resistance: the structure will not be damaged after soaking in water for one...

Embodiment 3

[0061]Mix 80 parts of a mixture of polyethylene glycol and glycerin (the volume ratio of polyethylene glycol and glycerin is 4:1, and the molecular weight of polyethylene glycol is 400) and 7 parts of concentrated sulfuric acid in a three-necked flask. , heated up to 140°C under constant stirring, added 20 parts of banana pseudostem powder, and reacted at constant temperature for 120 minutes to obtain 100 parts of liquefied product; added 1000 parts of polyvinyl acetate emulsion, and adjusted the mixed solution with a mass fraction of 20% sodium hydroxide solution Continue to stir for 30 minutes in the three-necked flask until pH = 2.0; pour the mixture into a smooth glass plate model, spread the film by casting method, cure at 100°C for 3.5 hours, and place the cured film in ethanol Rinse and serve, air dry.

[0062] Polyvinyl acetate film appearance: light brown film

[0063] Technical indicators:

[0064] Water resistance: the structure will not be damaged after soaking i...

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Abstract

The invention discloses a polyvinyl acetate film and a preparation method thereof. The preparation method comprises the following steps: 1, mixing banana caulo powder, polyhydric alcohols and an acid catalyst to react for 100 to 150min under the temperature of 120 to 180 DEG C so as to obtain a banana caulo liquefied product; 2, mixing the banana caulo liquefied product obtained in the step 1 with a basic catalyst and polyvinyl acetate emulsion for 30 to 60 min to obtain a mixed solution, then filming with the mixed solution, and curing; 3, beaching the film cured in the step 2 with a polarity small molecule solvent. The polyvinyl acetate film prepared by the preparation method is in a color of russet brown-puce in appearance, and is high in water resistance and softness. The polyvinyl acetate film prepared from banana caulo is a novel degradable environmentally-friendly film material and can be used as the raw material for novel leather, packaging and buffering materials.

Description

technical field [0001] The invention relates to the technical field of film production, in particular to a polyvinyl acetate film and a preparation method thereof. Background technique [0002] With the requirements of sustainable development and the enhancement of people's awareness of environmental protection, the research and development of environment-friendly products has attracted more and more international attention and attention. As an agricultural by-product, the pseudostem left after banana harvest has the characteristics of regeneration, wide source, and abundant energy storage, and has attracted extensive interest of many researchers. At present, the utilization mode of banana pseudostem is various, as: do poultry and livestock feed technology, do industrial raw material (spinning, papermaking), return field technology, make biogas technology etc., above-mentioned utilization banana pseudostem technology is affected by geography , raw material and the reason of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L31/04C08L97/02
Inventor 张玉苍李崴劳邦盛
Owner HAINAN UNIV