Intelligent breathing fruit and vegetable fresh-keeping film

Abstract

The invention discloses an intelligent breathing fruit and vegetable fresh-keeping film which is prepared from the following raw materials in parts by weight: 90-96.5 parts of a low-density polyethylene resin, 0.5-2 parts of a silicon dioxide opening agent, 1-2 parts of hydrochloric acid, 1-2 parts of titanium dioxide, 0.5-2 parts of N-acetamido-4-vinyl pyridine, and 0.5-2 parts of oleamide. The film belongs to the technical field of fresh-keeping, and is mainly used for packaging fruit and vegetable products; the low-density polyethylene is taken as the basic raw materials, and various conditioning components are added for modification, so that the purpose of prolonging the fresh-keeping time of the fruit and vegetable products is achieved. By adding inorganic chemical components, the air permeability of the film is improved, the breathing action is slowed down, and the fresh-keeping time is prolonged; and the intelligent breathing fruit and vegetable fresh-keeping film has the functions of air permeation balance adjustment, ethylene elimination, frosting prevention and antibiosis.

Description

technical field [0001] The invention belongs to the technical field of fresh-keeping packaging for products, and in particular relates to an intelligent breathing fruit and vegetable fresh-keeping functional film. Background technique [0002] At present, the fresh-keeping materials used in the field of product fresh-keeping packaging include polyethylene, polyvinyl chloride, etc., because polyvinyl chloride has a certain degree of toxicity, it is forbidden to be used in the packaging of cooked food, and low-density polyethylene film is characterized by its unique non-toxic Harmlessness is playing an increasing role in the field of product freshness packaging. Products such as fruits, vegetables and flowers will release ethylene gas during the ripening process. Ethylene gas has the effect of accelerating ripening, which is not conducive to freshness preservation to a certain extent. Ordinary food packaging films are prone to accumulation of water droplets in the film durin...

AI Technical Summary

Problems solved by technology

Products such as fruits, vegetables, and flowers will release ethylene gas during the ripening process. Ethylene gas has the effect of accelerating ripening, which is not conducive to freshness preservation to a certain extent.

Ordinary food packaging films are prone to accumulation of water droplets in the film during the preservation process, and frosting will occur under low temperature conditions, which affects the appearance and taste of food, and is not conducive to food preservation

[0003] The ordinary polyethylene cling film in the prior art does not have the functions of breathable balance adjustment, ethylene gas removal, anti-frost and antibacterial, and most of them do not meet the effects or indicators of the national standard such as tensile strength, and cannot play a role. The effect of prolonging the preservation time

In the prior art, some polyethylene cling films with similar functions are still in the laboratory research and development stage in China, and only have one or two functions of air permeability balance adjustment, ethylene gas removal, anti-frost and antibacterial functions, and cannot At the same time, it has not yet reached the national standard in terms of strength and toughness.

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