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A kind of compression sealing method of anionic polysaccharide film

An anionic polysaccharide and film technology, applied in the field of food packaging materials, can solve the problem that polysaccharide films are difficult to be compressed into bags, and achieve the effects of extending shelf life, reducing the use of plastics and protecting the environment.

Active Publication Date: 2022-07-01
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problem that the existing polysaccharide film is difficult to press-seal into bags, and provides a press-sealing method for an anionic polysaccharide film

Method used

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  • A kind of compression sealing method of anionic polysaccharide film
  • A kind of compression sealing method of anionic polysaccharide film
  • A kind of compression sealing method of anionic polysaccharide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: The method of pressing and sealing the anionic polysaccharide film of this embodiment is carried out according to the following steps:

[0034] 1. Preparation of chitosan quaternary ammonium salt solution: add 0.5 g of chitosan quaternary ammonium salt into 100 mL of distilled water, and stir at room temperature until completely dissolved to obtain a chitosan quaternary ammonium salt solution;

[0035] 2. Add 6g of kappa-carrageenan to 400mL of distilled water with a temperature of 65°C and stir for 45min, add 3g of sorbitol, and continue to stir for 45min to obtain a film-forming solution; pour the film-forming solution into a plastic tank while it is still hot and cast into a film. The κ-carrageenan film was obtained by drying at a temperature of 50°C for 24 hours; the κ-carrageenan film was pretreated for 6 hours at a temperature of 25°C and a humidity of 53% RH;

[0036] 3. Apply the chitosan quaternary ammonium salt solution to the place to be sealed ...

Embodiment 2

[0038] Example 2: The difference between this example and Example 1 is that the amount of chitosan quaternary ammonium salt added in step 1 is 1.0 g, and the others are the same as in Example 1; the obtained sealing sample is recorded as κC-10CQAS.

Embodiment 3

[0039] Example 3: The difference between this example and Example 1 is that the amount of chitosan quaternary ammonium salt added in step 1 is 1.5 g, and the others are the same as in Example 1; the obtained sealing sample is recorded as κC-15CQAS.

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Abstract

A compression sealing method of anionic polysaccharide film relates to a compression sealing method of polysaccharide film. The invention aims to solve the technical problem that the existing polysaccharide film is difficult to be compressed and sealed into bags. The compression sealing method of the anionic polysaccharide film of the present invention: first, preparing a chitosan quaternary ammonium salt solution; second, pretreatment of the anionic polysaccharide film; third, smearing the chitosan quaternary ammonium salt solution between two anionic polysaccharide films At the pressure-sealing place, pressing for 1-2 s under the conditions of a pressure of 0.3-0.5 MPa and a temperature of 20-30° C. to complete the pressure-sealing of the anionic polysaccharide film. The anionic polysaccharide film of the invention has a sealing strength of 1.38±0.26-6.95±0.95N / 15mm after being press-sealed, can be used for packaging food such as butter, can effectively prolong the shelf life of the food, and can be used in the field of food packaging.

Description

technical field [0001] The invention relates to a method for pressing and sealing a polysaccharide film, and belongs to the technical field of food packaging materials. Background technique [0002] As we all know, due to the non-degradability of plastic packaging films, a large amount of white pollution is caused, which is extremely harmful to the environment. In 2020, my country will ban or restrict the use of some plastics in some regions and fields. At present, about 500 billion plastic bags are used every day in my country, but only 3% are recycled, which means that using degradable biomass packaging film instead of plastic helps reduce pollution. Polysaccharides are widespread in nature and have received increasing attention from researchers due to their reproducibility and biodegradability. Carrageenan is a negatively charged linear polysaccharide extracted from red algae and is widely used in the food and pharmaceutical industries. As the main substance for film f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/12C08L5/00C08L1/28C08L5/04C08L5/08B65D65/46
CPCC08J5/127B65D65/466C08J2305/00C08J2301/28C08J2305/04C08J2405/08Y02W90/10
Inventor 王立娟迟文锐
Owner NORTHEAST FORESTRY UNIVERSITY