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Preparation method of degradable environment-friendly packaging film

A packaging film and environment-friendly technology, applied in the field of preparation of degradable and environment-friendly packaging films, can solve the problems of low production rate, high cost, complicated process, etc., and achieve high production rate, low cost and simple and reasonable process. Effect

Inactive Publication Date: 2015-07-08
TONGCHENG FURUN PACKAGING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing a degradable and environment-friendly packaging film, so as to solve many defects in the prior art, such as complex process, low production rate, and high cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method of a degradable environment-friendly packaging film, comprising the following steps:

[0020] (1) Dissolving chitosan: dissolving chitosan in acetic acid solution to obtain a chitosan solution with a mass concentration of 30g / L;

[0021] (2) Preparation of hydroxypropyl methylcellulose solution: use distilled water to prepare a hydroxypropyl methylcellulose solution with a mass concentration of 10 g / L;

[0022] (3) Mixing: mix the chitosan solution prepared in step (1) with the hydroxypropyl methylcellulose solution prepared in step (2) according to the volume ratio of 1:0.8;

[0023] (4) Add metal ion compound: add the metal ion compound to the mixed solution prepared in step (3), then stir with a magnetic stirrer, degas it ultrasonically, and cast the film at 25°C;

[0024] (5) Membrane production: Put the membrane in step (4) into a drying oven to dry for 4 hours, then soak it in 2.0mol / L NaOH solution for 1 hour, take it out and wash it with wa...

Embodiment 2

[0026] All the other are identical with embodiment 1, and difference is that in described step (1), get chitosan and be dissolved in acetic acid solution, obtain the chitosan solution that mass concentration is 35g / L; Use distilled water in described step (2) The mass concentration of the configuration is 15 g / L hydroxypropyl methylcellulose solution; in the step (4), the metal ion-containing compound is added to the mixed solution prepared in the step (3), then stirred with a magnetic stirrer, and ultrasonically Degassing, then casting at 45°C to form a film;

Embodiment 3

[0028] All the other are identical with embodiment 1, and difference is that in described step (1), get chitosan and be dissolved in acetic acid solution, obtain the chitosan solution that mass concentration is 33g / L; Use distilled water in described step (2) The mass concentration of the configuration is 12g / L hydroxypropyl methylcellulose solution; in the step (4), the metal ion-containing compound is added to the mixed solution prepared in the step (3), then stirred with a magnetic stirrer, ultrasonically Gas, and then cast at 32 ° C to form a film;

[0029] Based on the above: by dissolving chitosan--preparing hydroxypropyl methylcellulose solution--mixing--adding metal ion compounds--film making five major process steps, chitosan mixed with hydroxypropyl methylcellulose simultaneously contains The metal ions can be used to prepare an environment-friendly packaging film, which also has an antibacterial effect. The technical solution of the invention has a simple and reason...

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Abstract

The invention discloses a preparation method of a degradable environment-friendly packaging film, relating to the field of packaging material preparation. The preparation method comprises the following steps: dissolving chitosan, preparing a hydroxypropyl methylcellulose solution, mixing, adding a metal ion compound and preparing the film. The chitosan is mixed with hydroxypropyl methylcellulose and charged with the metal ions to prepare the environment-friendly packaging film. The environment-friendly packaging film has the antimicrobial effect. According to the technical scheme, the method has the advantages of simple and reasonable technique, high yield, no environment pollution and lower cost.

Description

technical field [0001] The invention relates to the field of packaging material preparation, in particular to a preparation method of a degradable and environment-friendly packaging film. Background technique [0002] In the existing life, lunch boxes, packaging bags and disposable garbage bags, with the increase in people's demand for them in life, plastic waste has become a major public hazard that pollutes cities and oceans. These waste gas packaging materials cause The problem of white pollution has become a hot spot of social concern, and there is an urgent need for new degradable packaging materials. [0003] Chitosan is a natural polymer, which is obtained by hydrolyzing chitin under alkaline conditions to partially deacetylate it. It is the only alkaline polysaccharide in nature at present. It has many unique properties. It is non-toxic and has good film-forming properties. , can be completely degraded, and is considered to be a very potential packaging film materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L5/08C08L1/28B65D65/46
CPCY02W90/10
Inventor 杨峰
Owner TONGCHENG FURUN PACKAGING MATERIAL