Special polyvinyl alcohol thin film for fruit and vegetable packaging

Abstract

The invention discloses a special polyvinyl alcohol thin film for fruit and vegetable packaging. The special polyvinyl alcohol thin film comprises the following raw materials in part by weight: 100 parts of polyvinyl alcohol, 10-25 parts of starch, 5-13 parts of gelatin, 2-4.8 parts of montmorillonite, 1-3 parts of activated carbon, 0.5-2 parts of zeolite, 3-5.6 parts of modified alumina, 0.5-2 parts of nanometer silicon dioxide, 0.3-2 parts of chitosan quaternary ammonium salt, 2-8 parts of plant extract, 1-5 parts of spirulina, 0.01-0.09 part of antioxidant, 2-8 parts of retinervus luffae fructus, 2-8 parts of retinervus luffae fructus, 0.3-0.8 part of plant essential oil, 0.2-0.85 part of glutamine transaminase and 0.01-0.1 part of antibacterial peptide . The special polyvinyl alcohol thin film for fruit and vegetable packaging, disclosed by the invention, is excellent in antibacterial property, high in strength, low in moisture permeability and excellent in heat and weather resistance, is used for keeping fruits and vegetables fresh, is good in antibacterial and anti-mildew properties and can prolong the shelf lives of the fruits and the vegetables.

Description

technical field [0001] The invention relates to the technical field of fruit and vegetable preservation, in particular to a special polyvinyl alcohol film for fruit and vegetable packaging. Background technique [0002] Fruits and vegetables are always biologically active after picking, so they are very prone to biologically active growth and life maintenance in the natural environment. On the one hand, this biologically active process consumes the nutrients of the fruits and vegetables themselves and causes the fruits and vegetables to age; On the one hand, due to the water vapor that fruits and vegetables continue to produce, some molds can grow and corrode them, resulting in greater nutrient loss, and even rot and mildew, resulting in complete deterioration of fruits and vegetables and making them inedible. Fresh-keeping packaging technology is an effective way to extend the shelf life of fruit and vegetable products, reduce the loss rate of products and maintain their co...

AI Technical Summary

Problems solved by technology

Polyvinyl alcohol film has good transparency and gloss, high tensile strength and tear strength, excellent gas barrier performance, good heat sealing and cohesiveness, etc. It has been used in fruit and vegetable preservation, but The antibacterial properties of the existing polyvinyl alcohol films are not very good, and the strength and moisture permeability are still not very satisfactory, which limits its application