Polymeric web compositions having improved alkaline solubility for use as fibers
AssigneeKimberly-Clark Corporation
InventorsPhilip A. Sasse, Debra H. Durrance, Glenn A. Taylor
Life of this patent
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Abstract
The properties of (meth)acrylic ester/(meth)acrylic acid copolymer webs, such as films and nonwovens, are improved by blending the ester/acid copolymer with a modified polyolefin, such as an ethylene/(meth)acrylic acid copolymer and/or a styrene/butadiene block copolymer, and a polyether block amide copolymer. The copolymer blend provides a polymeric material which is useful for making personal care products such as diapers and feminine pads in that it can be made water-soluble in alkaline solutions while exhibiting other properties which are necessary for adequate product performance. Such materials are also useful for packaging products, such as film for plastic bags and the like.
Claims34
A polymeric web if fibers, said fibers comprising a blend of from about 50 to about 90 weight percent of a copolymer of a (meth)acrylate ester and (meth)acrylic acid, and from about 5 to about 30 weight percent of a copolymer of ethylene and (meth)acrylic acid, and from about 1 to about 10 weight percent of a polyether block amide copolymer.
A nonwoven web of fibers, said fibers comprising a blend of from about 70 to about 90 weight percent of a copolymer of ethyl acrylate and methacrylic acid, from about 10 to about 15 weight percent of a copolymer of ethylene and (meth)acrylic acid, and from about 3 to about 5 weight percent of a polyether block amide copolymer, wherein said copolymer of ethyl acrylate and methacrylic acid comprises about 80 weight percent ethyl acrylate moieties and about 10 weight percent methacrylic acid moieties and wherein said copolymer of ethylene and acrylic acid comprises about 80 weight percent ethylene moieties and about 20 weight percent acrylic acid moieties.
An absorbent article comprising an outer cover, an absorbent core and an inner liner, wherein either of said outer cover or said inner liner is a nonwoven web of fibers, said fibers comprising a blend of from about 50 to about 90 weight percent of a copolyemr of a (meth)acrylate ester and (meth)acrylic acid, from about 5 to about 30 weight percent of a copolymer of ethylene and (meth)acrylic acid, and from about 1 to about 10 weight percent of a polyether block amide copolymer.
Dependencies are inferred from the claim text.