Special fresh-keeping breathable film for fruits and vegetables and preparation method thereof

Abstract

The invention provides a fresh-keeping breathable film special for fruits and vegetables and a preparation method of the fresh-keeping breathable film. The fresh-keeping breathing film is prepared from polypropylene, metallocene polypropylene, high-melt-strength polypropylene, a slipping agent, a processing aid, an antifogging agent, an antioxidant, an antibacterial agent and an antistatic agent, the surface of the fresh-keeping breathing film is coated with an antifogging coating, fine laser drilling is conducted on the fresh-keeping breathing film, the drilled fresh-keeping breathing film has the antifogging performance, and the anti-fogging performance of the fresh-keeping breathing film is improved. Meanwhile, the high gas permeability and the high water vapor permeability are achieved, liquid water cannot permeate, a good effect on preventing excessive carbon dioxide is achieved, two-way adjustment can be conducted on carbon dioxide and oxygen at the same time, the respiration intensity of fruits and vegetables is relieved, aging of the fruits and vegetables is delayed, water and powder loss is reduced, and therefore the effect of prolonging the storage life is achieved.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping film preparation, in particular to a fresh-keeping breathing film dedicated to fruits and vegetables and a preparation method thereof. Background technique [0002] Fruits and vegetables are important raw materials in the food industry, and storage and preservation after a large number of harvests has become a difficult problem. Due to their own respiration, they are more prone to deterioration compared to other storage materials, and have a short shelf life. When fruits and vegetables are placed in plastic bags and sealed, the bags The fruits and vegetables in the plant will undergo anaerobic respiration, produce a large amount of ethanol, and at the same time cause bacterial growth, which is harmful to the body. At the same time, the post-harvest loss rate increases, which increases the cost of fruits and vegetables. [0003] Fruits and vegetables need to be kept fresh during transportatio...

AI Technical Summary

Problems solved by technology

[0002] As important raw materials in the food industry, fruits and vegetables are difficult to store and keep fresh after a large amount of picking. Because they can also respire themselves, they are more likely to deteriorate compared to other stored materials and have a shorter shelf life. When fruits and vegetables are placed in plastic bags and sealed, the bags The fruits and vegetables in the environment will undergo anaerobic respiration, which will produce a large amount of ethanol, and at the same time cause the growth of bacteria, which is harmful to the body. At the same time, the loss rate after harvest will increase, which will increase the cost of fruits and vegetables

[0003] Fruits and vegetables need to be kept fresh during transportation. The method of wrapping with plastic wrap can reduce the loss of freshness. In the current related technology, polyethylene resin is used to add processing aids to produce plastic wrap, which is convenient and cheap, but it cannot provide a solution for the respiration of fruits and vegetables. Balancing the carbon dioxide and oxygen inside and outside the fruit and vegetable plastic wrap to reduce the growth of bacteria is a problem that needs to be solved at present

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