Intelligent anti-fog moisturizing high-barrier storage and transportation preservative film, preparation method and application

Abstract

The invention relates to an intelligent anti-fog moisturizing high-barrier storage and transportation preservative film. The preservative film comprises an anti-fog preservative film layer, an ethylene-removed preservative film layer, a first PE preservative film layer, a coolant layer and a second PE preservative film layer, wherein the inner surface of the anti-fog preservative film layer can bein direct contact with fruits and vegetables; the outer surface of the anti-fog preservative film layer is tightly connected with the inner surface of the ethylene-removed preservative film layer; the outer surface of the ethylene-removed preservative film layer is tightly connected with the inner surface of the first PE preservative film layer; the outer surface of the first PE film layer is tightly connected with the inner surface of the coolant layer; the outer surface of the coolant layer is tightly connected with the inner surface of the second PE preservative film layer. The preservative film is particularly suitable for replacing a preservative film which is easy to fog in a storage process; the after-ripening effect of ethylene on the fruits and vegetables is reduced, and the shelf life is prolonged; the preservative film is suitable for the fruits which need low temperature in the storage and transportation process; and the labor and material costs in the storage and transportation packaging process are reduced.

Description

technical field [0001] The invention belongs to the technical field of food processing, in particular to an intelligent anti-fog, moisturizing and high-barrier storage and transportation fresh-keeping film, a preparation method and an application. Background technique [0002] There are following 4 problems in the preservative film in the fresh-keeping field of fruits and vegetables in the prior art: [0003] (1) The inside of the plastic wrap is easy to condense, which will accelerate the decay of fruits and vegetables; (2) The accumulation of ethylene in the fresh-keeping bags in the preservation of fruits and vegetables, because ethylene accelerates the ripening and causes the decay of fruits and vegetables; maintain a constant low temperature. [0004] The main reason that causes this above-mentioned problem is: (1) the H of common cling film 2 O vapor permeability is poor, and the water released by apple respiration will condense into water droplets; (2) Fruits and ve...

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Problems solved by technology

[0003] (1) The inside of the plastic wrap is easy to condense, which will accelerate the decay of fruits and vegetables; (2) The accumulation of ethylene in the fresh-keeping bags in the preservation of fruits and vegetables, because ethylene accelerates the ripening and causes the decay of fruits and vegetables; maintain a constant low temperature

[0004] The main reason that causes this above-mentioned problem is: (1) the H of common cling film 2 O vapor permeability is poor, and the water released by apple respiration will condense into water droplets; (2) Fruits and vegetables contain endogenous ethylene, and the accumulation of ethylene will increase the peroxidase activity and malondialdehyde content of fruits and vegetables, and enhance the permeability of cell membranes , to enhance the respiration; (3) The respiration of fruits and vegetables will generate heat, and the plastic wrap will block the divergence of heat, so that the fruits and vegetables cannot accurately reach the optimal storage temperature

[0005] The defective of prior art: (1) the H of common fresh-keeping film 2 O steam permeability is poor; (2) reducing ethylene content mostly is to adopt ethylene adsorbent packet in fresh-keeping, wherein contains the precursor reagents such as potassium permanganate, can cause harm to human body; (3) existing fresh-keeping film There is a heat insulation barrier layer, but this method cannot solve the heat generated by the fruits and vegetables themselves

But there is no hygroscopic effect, and the moisture is still stored inside the plastic wrap, which will still cause the fruits and vegetables to rot

[0010] (2) The tackifier uses modified asphalt, which has potential safety hazards

[0012] 2. For the problem of ethylene, none of the existing plastic wraps has the function of removing ethylene. Most of them add ethylene adsorbent packets to the fresh-keeping system, but it contains poisonous reagents such as potassium permanganate, which will cause harm to the human body. harm

[0016] (1) The heat-insulating plastic wrap made by the above process is completely opaque, and it is impossible to visually observe whether the fruits and vegetables in it are rotten, bruised, etc.

[0017] (2) The woven fabric and reflective barrier layer can only prevent external heat from entering the fruits and vegetables in the plastic wrap, but there is no way to absorb the heat generated by respiration in the fruits and vegetables

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