Self-sterilizing package and methods for making and using the same
View Patent ↗The presently disclosed subject matter provides a system and method for sterilizing a wide variety of products. Specifically, in some embodiments, the presently disclosed subject matter is directed to a package that is capable of self-sterilizing by initiating sterilizing conditions inside the package interior without the necessity of being treated with an externally-supplied sterilizing medium. Particularly, the disclosed package includes at least one dual-layer lid that comprises inner and outer layers and an interstitial space that houses a sterilizing gas-producing component.
1. A method of sterilizing, sanitizing, or disinfecting a product, said method comprising:
a. sealing the product into an interior of a package comprising:
the interior; and
at least one dual-layer wall comprising:
i. an inner permeable layer,
ii. an outer impermeable layer, and
iii. an intersticial space positioned between the inner and outer layers, wherein the intersticial space comprises a reactant solution having a reactant and a co-reactant that combine to produce a gas that at least one of sterilizes, sanitizes and disinfects, wherein the reactant solution having a 1-40 weight percent aqueous chlorite or chlorate salt solution and a pH of 8-13 prior to addition to the package;
b. waiting a desired amount of time to effect sterilization, sanitation, or disinfection; and
c. unsealing the package to access the product.
2. The method of claim 1 , wherein said product is a medical product.
3. The method of claim 1 , wherein the amount of reactant solution is about 0.1 to 10 microliters per cm 2 of dual layer wall.
4. The method of claim 1 , wherein the reactant solution is introduced between the inner and outer layers prior to sealing the package.
5. The method of claim 4 , wherein the reactant solution is delivered as the inner and outer layers are moving into the sealing zone for sealing the package on an automated packaging machine.
6. The method of claim 1 , wherein the gas comprises at least one of chlorine dioxide, dichlorine monoxide and ozone.
7. The method of claim 6 , wherein the peak concentration of the gas inside the package is between 10 ppmv and 10,000 ppmv.
8. The method of claim 1 , wherein a gas sensor is used outside the package during sterilization to detect leakage of gas from the package.