Application of a longan fresh-keeping paper

Abstract

The invention discloses an application of longan fresh-keeping paper. The longan fresh-keeping paper is formed through sequentially packaging a base material, a coating and loading layer, an SO2 releasing agent and a packaging material, the base material and the packaging material are made of breathable and permeable materials, and the coating and loading layer is selected from an acrylate pressure-sensitive adhesive, a non-setting adhesive and a 3M adhesive; and the SO2 releasing agent is formed through mixing a main release agent with a release accelerant according to a mass ratio of 1:0.10-0.25. When the longan fresh-keeping paper is used, fruits are covered with the fresh-keeping paper, water vapor goes through the packaging material at the top of the fresh-keeping paper and enters the fresh-keeping paper in the fruit fresh-keeping process, the releasing agent absorbs water and then releases SO2, and the density of SO2 is greater than the density of air, so released SO2 sinks, uniformly diffuses in a fruit pile from top to bottom, and is uniformly absorbed by the fruits; and when the fresh-keeping paper is used to carry out fresh keeping, the good fruit rate of fruits stored at 1-5DEG C for 30d is 90-100%, and the shelf life in a 15-25DEG C air conditioning room is 3-5d.

Description

technical field [0001] The invention relates to the technical field of fruit fresh-keeping, and more particularly, relates to the application of longan fresh-keeping paper. Background technique [0002] Longan is one of the four major fruits in the southern subtropical region of my country. In the past two decades, the planting area and output of longan have reached a historically high level. Because longan fruit is sweet in flavor, rich in nutrition and has certain health care functions, it is deeply loved by consumers at home and abroad. However, longan in my country is generally matured in the hot summer season, with strong respiration, difficult to store and transport, easy browning of the pericarp, prominent problem of autolysis of the flesh, and the loss rate after reaching the northern market is as high as 30%. Short, browning of the pericarp occurred in more than ten days, and autolysis of the pulp occurred after more than twenty days. [0003] Domestic existing lon...

AI Technical Summary

Problems solved by technology

Release SO slowly in a fresh-keeping bag or plastic wrap 2 During the process, if the long-term low concentration acts, the cell structure will be damaged, which is not enough to inhibit the continuation of oxidation, and even cause the browning reaction to intensify due to the destruction of the cell structure; at the same time, due to the long-term slow release, the fruit will degrade itself SO 2 Capability declines, resulting in SO 2 Accumulates intracellularly, residues may increase substantially

This is also SO 2 During the use of the release agent, the reasons for the aggravated browning and poor fresh-keeping effect caused by insufficient dosage; in addition, SO 2 The gas is heavier than air, and the diffusion in the fruit pile is mainly downward movement, while the upward and surrounding diffusion ability is weak

Use one fresh-keeping bag or multi-point fresh-keeping bags to store some fruits far away from the preservative. Not only will they not get the fresh-keeping effect, but also because the dosage is too low, the browning will aggravate and quickly decay.

Images