U.S. introduces packaging that can change breathability

Different fruits and vegetables need to be kept at a certain concentration of oxygen and carbon dioxide, and such oxygen and carbon dioxide concentrations are difficult to control in sealed bags. Because when the temperature is high, the fruits or vegetables in the package will consume more oxygen and release more carbon dioxide. Therefore, if no adjustment is made, the preservation of food is bound to be affected. To solve this problem, a company in California, USA, is studying a packaging film. When the temperature of the membrane changes, it will change its permeability, so that different foods in the corresponding proportion of oxygen and carbon dioxide mixture gas preservation.