Method for adding layer of preservative film on packaging material and article

Abstract

The invention discloses a method for adding a layer of preservative film on a packaging material and an article. Cyclopropene is used as an active ingredient, and the preparation method comprises thefollowing steps: adding encapsulated or adsorbed cyclopropene into a high polymer material which can be dissolved in absolute ethyl alcohol or an organic solvent according to a ratio of 1-10% by usingan encapsulating agent or an adsorbent, conducting uniform stirring to prepare a liquid, and directly spraying or brushing the liquid on a packaging material and an article to form a layer of preservative film, so as to enable the packaging material and the article have a fresh-keeping function. The method is simple and scientific in process, and 1-MCP gas is almost not lost. The fresh-keeping material is relatively stable under a drying condition and can be stored for a long time. When wet air is encountered, 1-MCP can be slowly released to keep fruits, vegetables and flowers fresh, the effect is reliable, and application is convenient.

Description

technical field [0001] The invention relates to the field of fresh-keeping packaging materials for fruits, vegetables and flowers. Background technique [0002] my country is a big producer of fruits and vegetables, with an annual output of more than 800 million tons. my country's fruit production and area have always ranked first in the world. However, my country's fruit and vegetable preservation and transportation technology is backward, resulting in a high rate of decay and loss. Fruits reach 30%, and vegetables reach 30%. 30%-40%, resulting in huge economic losses. In developed countries, the attrition rate is less than 7%. After fruits and vegetables are harvested, in addition to improving fresh-keeping storage technology, the transportation and packaging of fruits and vegetables are also very important, especially the fresh-keeping packaging shows its importance. [0003] 1-Methylcyclopropene (1-MCP) can be used for the preservation of fruits, vegetables and flowers....

AI Technical Summary

Problems solved by technology

In some cases, 1-MCP is thermally molded into the coating, the mixture containing 1-MCP is sandwiched in the layer film, or the 1-MCP is compounded into the adhesive layer by a dry method. These preparation processes are relatively complicated.

1-MCP is an extremely active gas, especially when using thermoplastic technology, it will cause a large loss of gas