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| I claim: 1. A process for the generation of a peroxyacid species comprising the step of bringing ... |
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Bleaching article
| Details |
Inventors: Lucas, Malcolm Bramel; McKenna, James Francis; Diehl, Francis Louvaine;
Assignee: The Procter & Gamble Company (Cincinnati, OH)
Primary Examiner: Weinblatt; Mayer
Assistant Examiner:
Attorney, Agent or Firm: Wilson; Charles R., Yetter; Jerry J., Witte; Richard C.
A porous article releasably containing a dry, activated bleaching composition suitable for use in an automatic dryer. |
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DETAILED DESCRIPTION OF THE INVENTION The bleaching article herein comprises a receptacle having a porous member in at least one of its walls, said receptacle being closed to contain a bleaching composition, all as described more fully hereinafter.
Receptacle The article herein comprises a water-insoluble, closed receptacle containing within its cavity a bleaching composition.
The receptacle has at least one opening in its walls through which the bleaching composition is released.
Inasmuch as the receptacle is to be used in an automatic dryer, it is comprised of a heat resistant material, or a material which can be rendered heat resistant at dryer operating temperatures.
Moreover, the receptacle is fashioned from a material which is resistant to oxidation by the bleaching composition contained therein, both at ambient and dryer operating temperatures.
Since the article is designed for use in contact with damp clothing, it is made from a water-insoluble material.
The receptacle herein can be made from open-weave cotton, polyester, and the like, cloth.
The open-weave structure can be chosen to provide controlled release of the bleaching composition.
Preferred receptacles for use herein are fashioned from cellular foam materials having a plurality of passages from inner to outer surfaces.
Such foams are known in the art as "open pore" or "open call" foams, and have a large proportion of cells which are interconnected, thereby providing passageways, or "pores", through the interconnecting cells.
Open pore foams are distinguished from "closed pore" cellular foams in which the closed pore structure substantially isolates the individual cells.
Open pore foams can be made from polystyrene, polyurethane, polyethylene, poly-(vinyl chloride) cellulose acetate, phenol-formaldehyde and other foamed polymeric materials such as cellular rubber.
Many of these foams and their method of manufacture are disclosed in standard references such as the Encyclopedia of Polymer Science and Technology, Interscience Publishers, John Wiley & Sons, Inc
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Drugs 
