Green antibacterial brittleness-keeping fresh-keeping packaging method for sugar-core Fuji apples

Abstract

The invention relates to a green antibacterial brittleness-keeping fresh-keeping packaging method for sugar-core Fuji apples. The method comprises the following steps: step 1, fermenting bacillus natto under the auxiliary action of a needle plate corona electric field to obtain a metabolite, namely a biological antibacterial liquid, and spraying the biological antibacterial liquid on the surfacesof sugar-core apples through an atomization technology; step 2, preparing essential oil antibacterial brittleness-keeping particles by using an ionic crosslinking and O / W combined method, then spraying the essential oil antibacterial brittleness-keeping particles onto a polymer plasticized packaging film, and then carrying out vacuum treatment to realize tight wrapping of the film on the sugar-core Fuji apples; step 3, manufacturing a packaging bag by using a PE film to package the apples, inflating the packaging bag by using single CO2 gas, and then performing irradiation treatment by using medium-dose ionizing radiation; and step 4, performing storing at a low temperature. The method provided by the invention can effectively improve the antibacterial effect and prolong the fresh-keepingtime.

Description

technical field [0001] The invention belongs to the field of fresh-keeping apples, and relates to candied Fuji apples, in particular to a green antibacterial and crisp-preserving packaging method for candied Fuji apples. Background technique [0002] Apple is one of the main tree species for the development of Xinjiang's forestry and fruit industry. With the growing scale of planting, how to improve fruit quality has become a key issue that people pay attention to. Intrinsic quality reflects more storage and consumer preferences, mainly including flavor, texture, etc. Fruit crispness directly affects consumers' choice, that is, the commodity characteristics of fruit. [0003] The existing fresh-keeping packaging technology does not promote the quality preservation of candied apples. However, dehydration, softening and rot often occur during long-term refrigeration and shelf storage after harvest, which seriously affects the appearance and eating quality of apples, and rest...

AI Technical Summary

Problems solved by technology

[0006] The problem of this patent is: ①The type of bacteriostatic substance added in the film is too single, long-term use is easy to produce drug resistance to the bacteriostatic substance

② Diffusion coating method is used to coat the surface, which has the problem of uneven and unstable attached amount of bacteriocin on the film

③ Adding sawdust to form a film reduces the tensile properties of the film to a certain extent

[0008] The problems of this patent are: ①This fresh-keeping method requires secondary coating antibacterial treatment on fruits and vegetables, and the coating process takes a long time

② The bacteriostatic agent is sprayed on the outside of the film coating agent without direct contact with fruits and vegetables, so it is difficult to inhibit the growth and reproduction of residual microorganisms on the surface of fruits and vegetables

③Because the bacteriostatic agent is sprayed on the outside of the coating agent and has frequent contact with the air, the antibacterial effect will be greatly reduced after long-term storage, and it is difficult to achieve the expected results

[0010] The problems of this patent are: ①The proportion of natamycin in this formula is relatively large, but because the molecular structure of natamycin belongs to polyene macrolide, it is easily photolyzed by ultraviolet light, thus affecting its freshness Effect

②The modified atmosphere packaging selected in this fresh-keeping method is difficult to accurately control the gas concentration, and the operability in actual production is poor

③In this method, the taken out fruits and vegetables are directly bagged without being completely drained, resulting in excessive humidity in the bag, which is easy to breed microorganisms

Images