Vapor hydrogen peroxide bleach delivery
AssigneeFMC Corporation
InventorCharles W. Lutz
Life of this patent
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Abstract
The invention relates to the dispensing of hydrogen peroxide into a clothes dryer. The aqueous hydrogen peroxide is placed into a container with a microporous, hydrophobic surface which is heated whereby the hydrogen peroxide is vaporized and delivered to the interior of the dryer where it is available to bleach textiles.
Claims6
A method for bleaching damp textiles while they are exposed to heated gases in a clothes dryer by means of hydrogen peroxide initially confined as a liquid by the inner surface of a wall of a container, at least part of said wall being a microporous, hydrophobic membrane having an effective pore size of approximately 0.01 .mu.m to 0.4 .mu.m in size with the exterior surface thereof accessible to the heated gases of the dryer whereby said liquid hydrogen peroxide is vaporized by the heat of said gases and delivered as a vapor through said membrane into the heated gases of the dryer primarily at a time when the textiles to be bleached are still damp, yet near the end of the drying cycle when the temperature within the dryer is the highest.
A package for insertion into a clothes dryer comprising a wall defining the outer surface of a closed container, the inner surfaces of said wall confining a liquid, aqueous solution of 3% to 10% hydrogen peroxide, at least part of said wall being a hydrophobic, vapor-permeable membrane having an effective pore size of approximately 0.01 .mu.m to 0.4 .mu.m in size.
Dependencies are inferred from the claim text.