Antimicrobial and mildew resistant preservative film and preparation method thereof

Abstract

The invention provides an antimicrobial and mildew resistant preservative film and a preparation method thereof. The preservative film comprises the following raw materials in percentage by weight: 30-65% of a polymer, 3.5-12% of a natural antibacterial agent, 1.5-3% of sand sagebrush seed oil, 1.5-3% of cuttlefish bone, and 1.5-3% of glyceryl monooleate; the raw materials are subjected to various processing means to prepare the preservative film, and the prepared preservative film is bright, transparent, soft, thin and light, not only has excellent mechanical strength, ageing-resistant performance, good stretchability and tearing property, but also has the effects of being broad in antifungal spectrum, uniform in distribution, highly efficient, durable and safe, effectively inhibits the growth and reproduction of various malignant bacteria, fungi and mould, and at the same time, shows better barrier property, gas permeability, moisture-penetrability and gas replaceability, and automatically and persistently emits far infrared rays, so as to achieve the functions of purifying the environment, eliminating peculiar smell, self-cleaning and resisting mildew; besides, the preservative film provided by the invention can be directly used for storing various food, prolonging the preservation time, and has a broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of fresh-keeping films, in particular to an antibacterial and mildew-proof fresh-keeping film and a preparation method thereof. Background technique [0002] Plastic wrap is generally made of polyethylene, polyvinylidene chloride, and polyvinyl chloride as raw materials and additives for melt extrusion, granulation, and blow molding. It can be seen everywhere in daily life. It is mainly used for the packaging of grains, fruits, vegetables, meat, fish, soy products, seafood and other foods to block dust in the air and avoid bacterial erosion, thereby prolonging the preservation period. However, the preservative film currently on the market is prone to accumulation of water droplets in the film during use, and even fogging, which affects the appearance and taste of food. In addition, it does not have antibacterial and antifungal functions, and often due to the influence of temperature and humidity, a good env...

AI Technical Summary

Problems solved by technology

However, chitosan is insoluble in general organic solvents and water, and its antibacterial activity is only shown in acidic solution systems.

However, titanium dioxide has the problems of small specific surface area, poor dispersion, and easy agglomeration, resulting in the area where titanium dioxide is not distributed is still easy to adhere to bacteria and molds, which greatly reduces the antibacterial effect, and the bactericidal ability of titanium dioxide comes from its photocatalytic activity. restricted