Polyvinyl alcohol-based coating preservation packaging material and preparation method thereof

Abstract

The invention discloses a polyvinyl alcohol-based coating preservation packaging material and a preparation method thereof and relates to the field of coating film processing. The polyvinyl alcohol-based coating preservation packaging material is prepared from polyvinyl alcohol, stearic acid and glutaraldehyde according to a volume ratio of 20:8:1. According to the polyvinyl alcohol-based coating preservation packaging material prepared by taking the glutaraldehyde as a cross-linking agent, the film-forming permeable rate can be effectively reduced, the film-forming antibacterial property is obviously enhanced, the polyvinyl alcohol-based coating preservation packaging material can be used for salted egg preservation package, and the quality guarantee period can be effectively prolonged.

Description

technical field [0001] The invention relates to the field of packaging film processing, in particular to a polyvinyl alcohol-based coating film fresh-keeping packaging material and a preparation method thereof. Background technique [0002] The fresh-keeping method of coating film packaging is a new and convenient storage film method introduced in recent years. Polyvinyl alcohol (PVA) is easy to form a film and degrade, and has good hygiene and safety. It has been widely used in food packaging. The hydrophilic property of PVA makes it It has high water permeability after film formation, which will affect its application in food packaging. By increasing the molecular chain length and polarity of the polymers that make up the film, the hydrogen bond and electrostatic attraction between the polymers can be increased, thereby forming a network structure with a certain selectable barrier property. Maleic anhydride, acrylic acid, and propylene are used at home and abroad. Graft...

AI Technical Summary

Problems solved by technology

[0002]Coating film packaging fresh-keeping method is a new and convenient storage film method introduced in recent years. Polyvinyl alcohol (PVA) is easy to form film and degrade, and it is hygienic and safe , has been widely used in food packaging, the hydrophilic property of PVA makes the film have higher water permeability, which will affect its application in food packaging

By increasing the molecular chain length and polarity of the polymers that make up the film, the hydrogen bond and electrostatic attraction between the polymers can be increased, thereby forming a network structure with a certain selectable barrier property. Maleic anhydride, acrylic acid, and propylene are used at home and abroad. Graft polymerization of small molecular monomers such as amides improves the water resistance of PVA, and a lot of research work has been carried out in terms of biocompatibility. Domestically synthesized polyvinyl alcohol-chitosan interpenetrating network hydrogel, with polyethylene The mass ratio of alcohol to chitosan and the concentration of crosslinking agent glutaraldehyde increase, the gel swelling degree of modified PVA decreases and the hardness increases, and the antibacterial property is not high, which is not conducive to food, especially salted egg food preservation of