Treated nonwoven having an affinity for an active ingredient

Patent metadata

Field	Value
Publication number	US-11065160-B2
Application number	US-201615208845-A
Country	US
Kind code	B2
Filing date	Jul 13, 2016
Priority date	Jul 13, 2015
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

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.

First claim

That which is claimed:

1. A nonwoven comprising:
(a) at least a first spunbond 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 have an average diameter less than 10 microns; and
(b) an active ingredient disposed substantially at a surface of the fiber blend;
wherein the nonwoven is devoid of a meltblown layer; 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 cm 2 per gram of fiber blend.

2. The nonwoven according to claim 1 , wherein the non-round cross-sectional shaped fibers comprise a ribbon-shaped fiber.

3. The nonwoven according to claim 2 , wherein the ribbon shaped fiber comprises a width to thickness ratio greater than about 2.5.

4. The nonwoven according to claim 1 , wherein the active ingredient comprises an ingredient having a beneficial impact on skin, an ingredient that can modify the pH of a fluid, an ingredient that can control the growth an organism, or an ingredient that can absorb an odor causing compound from a fluid.

5. The nonwoven according to claim 1 , wherein the active ingredient comprises an ingredient that can provide a signal upon coming in contact with a chemical species.

6. The nonwoven according to claim 1 , wherein the active ingredient comprises an ingredient that can provide a signal upon becoming exposed to a specific environmental condition comprising wetness, temperature, or both.

7. The nonwoven according to claim 1 , wherein the active ingredient comprises at least one of a lactic acid or a salt thereof.

8. The nonwoven according to claim 1 , wherein the nonwoven comprises a topsheet disposed within a hygiene product.

9. The nonwoven according to claim 1 , wherein the first nonwoven layer has a theoretical surface area of greater than about 4250 cm 2 per gram of fiber blend and less than about 5000 cm 2 per gram of fiber blend.

10. The nonwoven according to claim 1 , wherein the first nonwoven layer has a theoretical surface area of greater than about 4500 cm 2 per gram of fiber blend.

11. The nonwoven according to claim 1 , wherein the fiber blend has from 75 wt. % to 99 wt. % of round cross-sectional shaped spunbond fibers.

12. The nonwoven according to claim 1 , wherein the first spunbond nonwoven comprises apertures such that fluid can pass through the apertures.

13. The nonwoven according to claim 1 , wherein the first spunbond nonwoven comprises a hydrophilic additive.

14. The nonwoven according to claim 13 , wherein the hydrophilic additive is melt dispersed within the fiber blend of round cross-sectional shaped spunbond fibers and non-round cross-sectional shaped spunbond fibers.

15. The nonwoven according to claim 13 , wherein the hydrophilic additive topically coated onto the fiber blend.

16. The nonwoven according to claim 1 , wherein the active ingredient is disposed in a film that surrounds an outer surface of the round cross-sectional shaped spunbond fibers and non-round cross-sectional shaped spunbond fibers.

17. A nonwoven comprising:
(a) at least a first spunbond nonwoven layer of 100 wt. % of round cross-sectional shaped fibers having an average diameter less than 10 microns; and
(b) an active ingredient disposed substantially at a surface of the round cross-sectional shaped fibers;
wherein the nonwoven is devoid of a meltblown layer; 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 cm 2 per gram.

Assignees

• Avintiv Specialty Materials Inc

Inventors

• Erlandsson Sven Krister
• Grondin Pierre
• Moody Iii Ralph A

Classifications

• A61L2300/21

  Acids · CPC title

• D04H1/4391

  characterised by the shape of the fibres · CPC title

• D04H3/016

  characterised by the fineness · CPC title

• A61F2013/51028

  being bicomponent · CPC title

• D04H1/4374 Primary

  using different kinds of webs, e.g. by layering webs · CPC title