A sterilizing method and a device

Title:

A sterilizing method and a device

Document Type and Number:

Japanese Patent JP6141950

Kind Code:

B2

Abstract:

A method of sterilizing an article by sequentially exposing the article to hydrogen peroxide and ozone is disclosed. The article is exposed under vacuum first to an evaporated aqueous solution of hydrogen peroxide and subsequently to an ozone containing gas. The exposure is carried out without reducing the water vapor content of the sterilization atmosphere, the water vapor content being derived from the aqueous solvent of the hydrogen peroxide solution and from the decomposition of the hydrogen peroxide into water and oxygen. The complete sterilization process is carried out while the chamber remains sealed and without removal of any component of the sterilization atmosphere. For this purpose, the chamber is initially evacuated to a first vacuum pressure sufficient to cause evaporation of the aqueous hydrogen peroxide at the temperature of the chamber atmosphere. The chamber is then sealed for the remainder of the sterilization process and during all sterilant injection cycles. Keeping the chamber sealed and maintaining the hydrogen peroxide and its decomposition products in the chamber for the subsequent ozone sterilization step results in a synergistic increase in the sterilization efficiency and allows for the use of much lower sterilant amounts and sterilization cycle times than would be expected from using hydrogen peroxide and ozone in combination.

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Inventors:

Silvie Dufulson
Jean-Martin Barriere
Bruno Tranbray

Application Number:

JP2015238619A

Publication Date:

June 07, 2017

Filing Date:

December 07, 2015

Export Citation:

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Assignee:

TS Ausley Inc.

International Classes:

A61L2/20; A61L2/24

Domestic Patent References:

JP59069077A
JP6510932A
JP8505787A
JP2002360672A
JP2007518954A
JP2010533030A

Foreign References:

US4956145
US5508009
US20070098591
US20110176959

Attorney, Agent or Firm:

Atsushi Aoki
Tetsuro Shimada
Shinji Mitsuhashi
Yoryo Mihashi
Yuichi Morimoto
Takuya Shinoda

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