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US 12,290,426 B2Granted
Treated nonwoven having an affinity for an active ingredient
AssigneeAVINTIV Specialty Materials Inc.
InventorsSven Krister Erlandsson, Pierre Grondin, Ralph A. Moody, III
Life of this patent
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Abstract
A nonwoven having a high affinity for an active ingredient is proved, the nonwoven having at least one high surface area fiber in addition to the active ingredient.
Claims18
A method of manufacturing a nonwoven comprising:
- (a) forming at least a first nonwoven layer having a fiber content consisting of a plurality of non-round cross-sectional shaped spunbond fibers, wherein the plurality of non-round cross-sectional shaped spunbond fibers have a bilobal shape, a trilobal shape, a bowtie shape, a ribbon-shape or any combination thereof, and
- (b) disposing an active ingredient substantially at a surface of the plurality of non-round cross-sectional shaped spunbond fibers;
- and
- wherein the first nonwoven has a strike through time that is less than 10 seconds for all three insults when tested per WSP 70.7(05);
- and wherein the first nonwoven layer has a theoretical surface area of greater than about 4200 cm2 per gram of fiber content.
2 more elements
A method of manufacturing a nonwoven comprising:
- (a) forming at least a first nonwoven layer comprising a fiber blend of round cross-sectional shaped spunbond fibers and non-round cross-sectional shaped spunbond fibers, wherein the round cross-sectional shaped fibers account for less than 5 wt. % of the fiber blend and have an average diameter less than 10 microns, wherein all of the round cross-sectional shaped spunbond fibers and non-round cross-sectional shaped spunbond fibers are rendered hydrophilic via a hydrophilic additive;
- and
- (b) disposing an active ingredient substantially at a surface of the fiber blend;
- and
- wherein the first nonwoven has a strike through time that is less than 10 seconds for all three insults when tested per WSP 70.7(05);
- and wherein the first nonwoven layer has a theoretical surface area of greater than about 4200 cm2 per gram of fiber blend.
3 more elements
Dependencies are inferred from the claim text.