Fruit and vegetable freshness retaining packaging material capable of releasing 1-methyl cyclopropene and preparation method thereof

Abstract

The invention provides a fruit and vegetable freshness retaining packaging material capable of releasing 1-methyl cyclopropene and a preparation method thereof, belonging to the technical field of a packaging material. The 1-methyl cyclopropene (1-MCP) is used as an active component and is added into a binding agent used by a dry method composite technique, so as to prepare a composite thin film using EVA / LDPE (Ethylene-Vinyl Acetate copolymer / Low-Density Polyethylene) / rubber modified film as an inner layer and using normally used polyethylene and polyethylene and or modified thin film thereof as an outer layer. When fruits or vegetables are filled into a freshness retaining bag prepared by the composite film, water gas generated by breath of the fruits or the vegetables induces the thin film to slowly release the 1-MCP in the bag; the 1-MCP is an ethylene stopping agent, and the fruits and the vegetables can be prevented from generating ethylene; the maturity of the fruits or the vegetables can be slowed, so that the goods self period and the storage period of the packaged fruits or vegetables can be prolonged; and before the fruits or vegetables are filled, water in air is not enough to release the 1-MCP. The freshness retaining function of the freshness retaining bag is not opened.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and relates to a multilayer composite film for fresh-keeping packaging of fruits and vegetables and a preparation method thereof, in particular to a fresh-keeping packaging material for fruits and vegetables capable of releasing 1-methylcyclopropene and a preparation method thereof. Background technique [0002] Fruits and vegetables are indispensable non-staple foods in people's daily life. They are the second most important agricultural products in the world after food, and they are also important processing raw materials for the food industry. Fresh fruits and vegetables not only provide a variety of nutrients for human health. my country is a big fruit producing country in the world, and the fruit industry occupies an important position in the national economy. Since the 1990s, my country's fruit production and area have been ranked first in the world, but fruit and vegetable pro...

AI Technical Summary

Problems solved by technology

[0005] When 1-MCP is fumigated, the space needs to be sealed, the preservative is released instantly, and the concentration is difficult to control. Generally, professionals are required to operate, otherwise it is difficult to achieve the expected effect. Therefore, it is necessary to develop a packaging material that can release 1-MCP slowly

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