| abstract |
PURPOSE: To obtain an easily usable and economical oxygen absorptive sheet structure by coverying both sides of a sheet made of a polymer in which an oxygen arresting composition is dispersed with an opaque packing material having a gas permeability and a moisture permeability. n CONSTITUTION: Both sides of an oxygen absorptive sheet, made of a polymer in which an oxygen arresting composition containing a metal such as iron, copper, etc., and a metal halide is dispersed, having an oxygen permeation coefficient of 1× 10 12 ml.cm/cm 2 .sec.mmHg and a waer vapor permeation coefficient of 5× 10 -9 ml.cm/cm 2 .sec.mmHg or more, are covered with an opaque packing material of an oxygen permeation coefficent of 0.01ml/cm 2 .atm.min and a moisture permeability of 100g/m 2 .24hr to obtain an oxygen absorptive sheet structure. The structure serves as a deoxydizer having an oxygen adsorbability desirably variable according to the size and thickness of the sheet. n COPYRIGHT: (C)1981,JPO&Japio |