Disposable absorbent articles containing particulate, free-flowing, insoluble swellable polymers
First Claim
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1. A disposable absorbent article containing a mixture prepared by:
- a. blending at least one water soluble pulverulent hydrophilic polymer and at least one pulverulent inert filler in a ratio of polymer to filler of from about 1;
9 to about 9;
1, a substantial portion of said filler having a particle size less than that of said polymer and present in an amount sufficient to cover a substantial portion of the surface area of said pulverulent polymer.b. thereafter while said blending is continued, contacting said mixture under thorough agitation with a finely divided spray of water at a rate and in an amount not to exceed that at which the mixture is maintained in a free-flowing particulate form, andc. thereafter exposing said mixture in said free-flowing particulate form to ionizing radiation for a period of time to crosslink said polymer.
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Accused Products
Abstract
Particulate, free-flowing, insoluble swellable polymers are provided which are comprised of a mixture of an insoluble, swellable hydrogel and inert filler. The mixtures are free-flowing powders or granules which can absorb many times their weight of water and hence are useful as a soil amendment.
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Citations
5 Claims
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1. A disposable absorbent article containing a mixture prepared by:
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a. blending at least one water soluble pulverulent hydrophilic polymer and at least one pulverulent inert filler in a ratio of polymer to filler of from about 1;
9 to about 9;
1, a substantial portion of said filler having a particle size less than that of said polymer and present in an amount sufficient to cover a substantial portion of the surface area of said pulverulent polymer.b. thereafter while said blending is continued, contacting said mixture under thorough agitation with a finely divided spray of water at a rate and in an amount not to exceed that at which the mixture is maintained in a free-flowing particulate form, and c. thereafter exposing said mixture in said free-flowing particulate form to ionizing radiation for a period of time to crosslink said polymer. - View Dependent Claims (2, 3, 4, 5)
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Specification