Leaf vegetable day-and-night filtering diffraction induced resistance, bacteriostasis and metabolism-regulating fresh-keeping film

Abstract

The invention provides a leaf vegetable day-and-night filtering diffraction induced resistance, bacteriostasis and metabolism-regulating fresh-keeping film; a preservative film inner layer is preparedby the following steps: putting a mixture into a three-layer co-extrusion film blowing machine for co-extrusion plasticizing to form a film, uniformly mixing 65% of polypropylene plastic, 2% of ZnSO4, 8% of walnut peel carbon, 20% of nano CaCO3 and 4% of nano TiO2, granulating, blowing, and controlling the processing temperature at 148-154 DEG C to obtain the preservative film inner layer; a middle layer is composed of 70% of high-density polyethylene, 6% of degradable plastic and 24% of nano CaCO3, and the extrusion temperature is 240 DEG C; an outer layer is composed of 75% of linear low-density polypropylene, 20% of degradable plastic and 5% of red mud, and the extrusion temperature is 220 DEG C. Aiming at the problems of chlorophyll degradation and yellowing, pathogenic bacteria infection and rotting and massive accumulation of ethylene in a fresh-keeping bag in the leaf vegetable storage process, a LED cold light source is adopted for day and night radiation, and a red filler isadded into the outer layer film of the fresh-keeping film to filter out light rays of other wave bands except red light.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping of agricultural products, in particular to a fresh-keeping film for leaf vegetable diurnal filtering and diffraction-induced antibacterial, antibacterial, and metabolic regulation. Background technique [0002] Fresh leafy vegetables have high water content, strong transpiration, and are prone to yellowing and rot. In order to ensure that leafy vegetables can maintain better quality during storage, it is necessary to carry out reasonable fresh-keeping packaging for leafy vegetables. Therefore, plastic wrap plays a very important role in the storage of leafy vegetables. [0003] Generally speaking, there are following three problems in existing leaf vegetable plastic wrap: [0004] (1) The selectivity of the light wave transmitted by the plastic wrap is poor. Shorter wavelength light waves such as ultraviolet light and blue light and dark conditions will cause the degradation of chlorophyll...

AI Technical Summary

Problems solved by technology

The problem with this comparative patent is: the plastic wrap itself has no bacteriostatic effect, and a bacteriostatic agent needs to be used in conjunction with it, which greatly reduces the cost and convenience of use

The problem in this comparative patent is: the bacteriostatic mustard oil added to the antibacterial fresh-keeping film is highly volatile, and the loss in the film-making process is large, which affects the original flavor of the fresh-keeping leafy vegetables

The problem with this patent is: there is no ethylene adsorption, and it is easy to cause yellowing of leaves when used to preserve leafy vegetables

Images