COMPOSITION HAVING SELECTIVE PERMEABILITY FOR CARBON DIOXIDE, FORMED ARTICLE COMPRISING THE SAME, FILM AND LAMINATED FILM

摘要

A composition having selective permeability for carbon dioxide, which comprises a mixture of a basic amino acid selected from among lysine, arginine, histigine and the like, poly(vinyl alcohol), and a polyhydric alcohol such as starch, has an isoelectric point of 7.5 or more, and, when formed, exhibits a high ratio of the permeability of carbon dioxide (PCO2) to that of oxygen gas(PO2); and a formed article comprising the composition. A film as such a formed product is safe from the viewpoint of food sanitation and can be suitably used for packaging a fermented food such as cheese, miso or pickles, and a food generating carbon dioxide such as garlic or coffee beans, and for packaging vegetables, fruits, cut flowers or the like.