Dynamic air conditioning fruit and vegetable fresh-keeping packing bag

Abstract

The present invention relates to the storage, transport and selling of fruits and vegetable. The dynamic air conditioning fruit and vegetable fresh keeping packing bag includes an inner bag to hold fruit and vegetable after fresh keeping treatment and precooling and filled with fresh keeping mixed gas and ethylene adsorbent and an sealed outer bag filled with fresh keeping mixed gas. The inner bag and the outer bag are made of penetrative and blocking thin film amterial separately; and the mixed fresh keeping gas consists of oxygen, CO2 and nitrogen. The outer bag has oxygen and CO2 density higher and lower than that in the inner bag separately to reach dynamic air conditioning fresh keeping. The present invention has very long fresh keeping period.

Description

technical field [0001] The invention relates to fresh-keeping, storage, transportation and sales of fruits and vegetables. Specifically, it is a dynamic modified atmosphere fresh-keeping packaging bag for fruits and vegetables. Background technique [0002] The existing fruit and vegetable fresh-keeping packaging bags are generally packed with fruits and vegetables and ethylene adsorbents in the packaging bags of barrier materials, and then the oxygen-reducing method of exhausting and pumping air or the modified atmosphere method of filling fresh-keeping mixed gas are used to preserve the fruits and vegetables. The disadvantage of the former oxygen reduction method is that it cannot sustainably maintain the minimum demand for the "living body" respiration of fruits and vegetables, resulting in "anoxic respiration". During anoxic respiration, the respiratory substrates of fruits and vegetables cannot be completely oxidized, resulting in the formation of alcohol And acetaldeh...

AI Technical Summary

Problems solved by technology

[0002] The existing fruit and vegetable fresh-keeping packaging bags are generally packed with fruits and vegetables and ethylene adsorbents in the packaging bags of barrier materials, and then the oxygen-reducing method of exhausting and pumping air or the modified atmosphere method of filling fresh-keeping mixed gas are used to preserve the fruits and vegetables. The disadvantage of the former oxygen reduction method is that it cannot sustainably maintain the minimum demand for the "living body" respiration of fruits and vegetables, resulting in "anoxic respiration". During anoxic respiration, the respiratory substrates of fruits and vegetables cannot be completely oxidized, resulting in the formation of alcohol And acetaldehyde and other substances, it is easy to cause the taste, deterioration and decay of fruits and vegetables; the disadvantage of the latter method is that the oxygen, carbon dioxide and nitrogen (or other inert gases) filled in the sealed package are a fixed value, such as ZL99125336.1 ; ZL99126929.2; Application No.: 99103003.6 and 00102092.7 and other patented technologies, the composition and volume percentage concentration of the fresh-keeping mixed gas in which various fruits and vegetables are packed into fresh-keeping packaging bags are generally: oxygen 1%-10%, carbon dioxide 1% %-15%, the rest is nitrogen concentration