Package for a sterilized material
AssigneeToppan Printing Co., Ltd.
InventorsSunao Thukamoto, Shyoji Yokokoji
Life of this patent
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Abstract
A package of, for example, a medical instrument adapted to be sterilized by ethylene oxide gas, which comprises a package body in which a paper substrate is coated with a polyester resin emulsion layer, and a thermoplastic resin emulsion layer, and a thermoplastic resin emulsion layer is laminated on said polyester resin emulsion layer, and a covering sheet heat-sealed to the thermoplastic resin emulsion layer around a packed material, thereby hermetically sealing the package, said package having an indicator enabling the completion of disinfection to be visibly recognized.
Claims9
A package of a sterilized material comprising a package body in which one side of a breathable, germ-proof paper substrate is coated with a water based thermoplastic polyester resin emulsion layer, and an emulsion layer of a water based thermoplastic resin selected from the group consisting of polyolefins, denatured polyolefin and ionomer resin, which is laminated on said polyester resin emulsion layer;
- and a covering sheet heat-sealed to the thermoplastic resin emulsion layer surrounding a disinfected object contained in the package body;
- the inside of said package being provided with means for indicating the completion of sterilization, said means comprising an ink composition containing a calcium halide for producing alkaline calcium hydroxide upon reaction and sterilization of the package with ethylene oxide and at least two pH-indicators which change color in the pH-region of 2 to 10, each pH-indicator having a different color-change region from each other to produce a stepwise color change as sterilization progresses.
Dependencies are inferred from the claim text.