Nonwoven Having Durable Hydrophilic Coating

• US 20110268932A1
• Filed: 04/29/2011
• Published: 11/03/2011
• Est. Priority Date: 04/30/2010
• Status: Abandoned Application

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Tally, Amy Lynn, Buhiru, Jensen Kirziri, Spitzmueller, Carolyn Ann, Catalan, Kemal Vatansever, Cheng, Calvin Hoi Wung
• Application Number:
  US13/097,176
• Publication Number:
  US 20110268932A1
• Time in Patent Office: Days
• US Class Current: 428/195.1
• CPC Class Codes: A61L 15/20 containing organic materials
• CPC Class Codes: A61L 15/26 Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof A61L15/225 takes precedence
• CPC Class Codes: A61L 15/34 Oils, fats, waxes or natural resins A61L15/225 takes precedence
• CPC Class Codes: C08L 83/12 containing polyether sequences
• CPC Class Codes: Y10T 428/24802 Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• CPC Class Codes: Y10T 442/2164 Coating or impregnation specified as water repellent

Abstract

A nonwoven material coated with an amine-polyether silicone. The coating composition may include a wetting agent, an acid, and/or a defoamer. The nonwoven may be incorporated into a disposable absorbent article. The disposable absorbent article may include at least trace amounts of a mineral oil. The coating of the nonwoven may be durable even in the presence of mineral oil.

Claims

1. An absorbent article comprising:

at least trace amounts of a mineral oil;

a hydrophobic nonwoven substrate disposed adjacent to the mineral oil; and

a coating composition comprising a polyether-modified trialkoxysilane disposed on the nonwoven substrate;

wherein the coated nonwoven substrate has a Residue on Cuff value less than 0.002 g/m².

2. The absorbent article of claim 1, wherein the mineral oil is a component of a hot melt adhesive.

3. The absorbent article of claim 1, wherein the mineral oil is a component of a lotion composition.

4. The absorbent article of claim 1, wherein the coating is applied to the nonwoven substrate in an amount of at least 0.1% by weight of the nonwoven.

5. The absorbent article of claim 1, wherein the nonwoven substrate is a component of a structure selected from the group consisting of a topsheet, an upper acquisition layer, a lower acquisition layer, a core wrap, a core cover, and a dusting layer.

6. The absorbent article of claim 1, wherein the polyether moiety of the polyether-modified trialkoxysilane has an average structure CH₂(O)CHCH₂(OCH₂CH₂)_6.9OCH₂CH(O)CH₂.

7. The absorbent article of claim 1, wherein the polyether moiety of the polyether-modified trialkoxysilane has an average structure CH₂(O)CHCH₂(OCH₂CH₂)_11.7OCH₂CH(O)CH₂.

8. The absorbent article of claim 1, wherein the coating composition further comprises a wetting agent and an acid.

9. The absorbent article of claim 8, wherein the acid is citric acid.

10. An absorbent core comprising:

first and second substrate layers;

absorbent particulate polymer material disposed in a discontinuous layer on each of the first and second substrate layers;

thermoplastic material comprising at least trace amounts of a plasticizer, encasing the absorbent particulate polymer material such that the thermoplastic material is in contact with at least one of the first and second substrate layers; and

a coating composition comprising a polyether-modified trialkoxysilane disposed on at least one of the first and second substrate layers, wherein the coated substrate layer has a Residue on Cuff value of less than 0.002 g/m².

11. The absorbent core of claim 10, wherein the coating composition further comprises a wetting agent and an acid.

12. An absorbent core comprising:

first and second substrate layers;

absorbent particulate polymer material disposed in a discontinuous layer on each of the first and second substrate layers;

thermoplastic material comprising at least trace amounts of a plasticizer, encasing the absorbent particulate polymer material such that the thermoplastic material is in contact with at least one of the first and second substrate layers;

a nonwoven core cover disposed on a body-facing surface of the first substrate layer; and

a coating composition comprising a polyether-modified trialkoxysilane disposed on at least one of the first and second substrate layers and the nonwoven core cover, wherein the coated layer or core cover has a Residue on Cuff value of less than 0.002 g/m².

13. The absorbent core of claim 12 wherein the coating composition is disposed on at least the first substrate layer and the core cover.

14. The absorbent core of claim 12 wherein the coating composition further comprises a wetting agent and an acid.

15. A method of reducing the migration of a hydrophilic coating to adjacent structures in an absorbent article, comprising:

providing a first hydrophobic nonwoven substrate;

coating the first hydrophobic nonwoven substrate with a coating composition comprising a polyether-modified trialkoxysilane to produce a coated nonwoven substrate; and

incorporating the coated nonwoven substrate into an absorbent article adjacent to a second hydrophobic nonwoven substrate, wherein the absorbent article comprises at least a trace amount of an oleaginous substance.

16. The method of claim 15, wherein the oleaginous substance is mineral oil.

17. The method of claim 15, wherein the oleaginous substance is adjacent to the coated nonwoven substrate.

18. The method of claim 15, wherein the coated nonwoven substrate is incorporated into the absorbent article as one of the group consisting of a topsheet, an upper acquisition layer, a lower acquisition layer, a core wrap, a core cover, and a dusting layer.

19. The method of claim 15, wherein the coated nonwoven substrate is incorporated into the absorbent article as a core cover, and the second hydrophobic nonwoven is a barrier leg cuff.