Fruit cold-chain transportation fresh-keeping method

Abstract

The invention discloses a fruit cold-chain transportation fresh-keeping method. The method comprises the steps that protective films are provided and comprise first flexible heat-conducting layers, second flexible heat-conducting layers and high-molecular water-absorbent resin layers, the first flexible heat-conducting layers and the second flexible heat-conducting layers are each provided with multiple first through holes and second through holes, and the high-molecular water-absorbent resin layers are exposed outwards from the first through holes and the second through holes; the high-molecular water-absorbent resin layers absorb mixed solutions of water and glycerol through the second through holes, and the volume of the absorbed mixed solutions is smaller than the saturated water absorption capacity of the high-molecular water-absorbent resin layers; a small amount of calcium chloride dry powder is added into the multiple first through holes; and after multiple fruits are packaged by the multiple protective films, the fruits are stacked in refrigeration and fresh-keeping space, and the first flexible heat-conducting layer of each protective film makes contact with the surfaces of the fruits. According to the method, the fruits can be effectively prevented from being physically damaged or rotted in the cold-chain transportation process, and the quality of the fruits is guaranteed.

Description

technical field [0001] The invention relates to a method for cold storage and preservation of fruit, in particular to a method for cold chain transportation and preservation of fruit. Background technique [0002] Fruit is a natural nutritious food, containing a variety of nutrients needed by human life. However, the harvested fruit is still a living organism, and it will also perform complex life activities such as dormancy, water evaporation, and respiration. These activities are closely related to fruit preservation, and affect and restrict the storage life of fruits. The external factors that affect fruit metabolism and storage effects are mainly temperature, gas composition, and humidity. At present, the commonly used method of fruit preservation at home and abroad is cold storage. The principle of preservation is roughly as follows: the method of lowering the temperature (-1°C to +5°C) is used to suppress the respiration of fruits. [0003] When fruit is refrigerated...

AI Technical Summary

Problems solved by technology

However, this method has many defects, including but not limited to: the thermal conductivity of this type of protective net is poor. When a large number of fruits are piled up and preserved, the temperature of the surface layer of the fruit pile may have reached the refrigeration temperature, and the center of the fruit pile will be frozen for a long time. Maintain a high temperature, so that the fruit in the center of the fruit pile is easy to deteriorate; this kind of protective net needs to reach a certain thickness to achieve the expected protective function, but this will take up more valuable storage space; this kind of protective net is stronger. Poor, easy to break, difficult to reuse, and will cause serious environmental pollution after being discarded

Images