FREE-OXYGEN ABSORBER PACKAGE WITH OXYGEN SENSING FUNCTION

摘要

PROBLEM TO BE SOLVED: To prevent free-oxygen absorbing capability of a free-oxygen absorber from dropping by sticking the tape-like free-oxygen absorber comprising an oxygen sensing constituent which is coated by a transparent adhesive single coated tape impervious to gas and moisture to be interposed between peripheral seals of a free-oxygen absorber packaging bag. SOLUTION: Tape-like oxygen sensing agent 1 comprising an oxygen sensing constituent 4 printed on a base material 3 which is coated by a transparent adhesive single coated tape 5 impervious to gas and moisture is stuck to peripheral seals sealed along four sides of a free-oxygen absorber packaging bag 2. This constitution does not clog a vent hole of the package, thereby preventing free-oxygen absorbing capability of the absorber from dropping. In addition, since the peripheral seals are extremely thinner than a center or a portion filled with the absorber of the package, the oxygen sensing agent does not stick to the packaging bag 2 even if the bag 2 is used for storing food or the like rich in oil. Thus free-oxygen absorption in an atmosphere can be correctly reflected.