Cleansing articles with controlled detergent release and method for their manufacture
First Claim
1. A cleansing article comprising:
- a porous pad; and
a water swellable controlled detergent release composition incorporated within said pad, said composition comprising polyacrylamide having detergent blended therein, said polyacrylamide having a weight average molecular weight of at least 5 million, said polyacrylamide and said detergem blended within said composition to allow for the controlled release of said detergent when said composition is exposed to water.
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Accused Products
Abstract
A cleansing article along with its method for manufacture are provided. The cleansing article comprises a porous pad which includes a controlled detergent release composition comprising: polyacrylamide (preferably having a weight average molecular weight greater than 200,000) and detergent preferably blended to provide a weight ratio of polymer solids:detergent solids between about 1:9 and about 1:100 and more preferably between about 1:12 and about 1:30. The method comprises preparing a coatable polymer/detergent blend comprising polyacrylamide, detergent and a liquid vehicle which on drying forms a controlled detergent release composition, applying said coatable blend to a porous pad, and drying said blend to provide said controlled detergent release composition. The controlled detergent release composition is substantially retained within the pad for subsequent use and thereafter slowly released when used.
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Citations
32 Claims
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1. A cleansing article comprising:
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a porous pad; and a water swellable controlled detergent release composition incorporated within said pad, said composition comprising polyacrylamide having detergent blended therein, said polyacrylamide having a weight average molecular weight of at least 5 million, said polyacrylamide and said detergem blended within said composition to allow for the controlled release of said detergent when said composition is exposed to water. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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- 11. The cleansing article as defined in claim I wherein said porous pad comprises a material selected from the group consisting of sponge, paper, fabric, plastic fibers, plastic ribbons, metal fibers, metal ribbons, and composite structures incorporating one or more of the foregoing materials.
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14. A cleansing article, comprising:
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a pad comprising a lofty nonwoven, open, three-dimensional network of fibers; and a water swellable controlled detergent release composition coated on said fibers, said composition comprising a polyacrylamide having a detergent therein to provide a weight ratio of polymer solids;
detergent solids between about 1;
9 and about 1;
100 and, said polyacrylamide having a weight average molecular weight of at least 5 million, wherein said composition provides the controlled release of said detergent when wet. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. A process for the manufacture of a cleansing article, the process comprising:
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preparing a coatable composition comprising polyacrylamide having a weight average molecular weight of at least 5 million, detergent and a liquid vehicle, said coatable composition on drying forms a controlled detergent release composition which releases said detergent in a controlled manner when wet; applying said coatable composition to a porous pad; and drying said coatable composition to provide said controlled detergent release composition within said porous pad. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification