Absorbent non-woven fibrous mats and process for preparing same

Patent metadata

Field	Value
Publication number	US-9457538-B2
Application number	US-27815907-A
Country	US
Kind code	B2
Filing date	Feb 2, 2007
Priority date	Feb 3, 2006
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

The present invention relates to liquid entrapping devices (e.g., absorbent non-woven fibrous mats) and to a process for preparing such devices. More particularly, the present invention relates to mechanically strong absorbent materials made from such liquid entrapping devices (e.g., non-woven fibrous mats) and to a method for preparing same. In one embodiment, a liquid entrapping device of the present invention comprises at least one hydrophilic elastomeric fibrous component (HEFC) and at least one wetting agent component. In another embodiment, a liquid entrapping device of the present invention comprise at least one hydrophilic elastomeric fibrous component (HEFC), at least one absorbent component, and at least one wetting agent component. In one instance, the wetting agent component of the present invention is contained on and/or within the fibers and/or nanofibers that form the liquid entrapping device (e.g., a non-woven fibrous mat) of the present invention.

First claim

What is claimed is:

1. A liquid entrapping device comprising: at least one hydrophilic elastomeric fibrous component; and at least one wetting agent component,
wherein the at least one hydrophilic elastomeric fibrous component and the at least one wetting agent component are in physical proximity resulting in fluid communication and the existence of the at least one wetting agent increases the absorption speed and absorption ability of liquid by the liquid entrapping device compared to an otherwise identical liquid entrapping device that does not contain the at least one wetting agent;
wherein the at least one wetting agent is i) coated on the surface of the at least one hydrophilic elastomeric fibrous component, ii) physisorbed or chemisorbed on the surface of the at least one hydrophilic elastomeric fibrous component or iii) embedded in the at least one hydrophilic elastomeric fibrous component;
wherein a liquid is entrapped by being absorbed by the liquid entrapping device, and the at least one hydrophilic elastomeric fibrous component absorbs and wicks the liquid.

2. The liquid entrapping device of claim 1 , wherein the at least one hydrophilic elastomeric fibrous component is selected from at least one electrospun hydrophilic elastomeric fibrous component, at least one nanofiber by gas jet hydrophilic elastomeric fibrous component, or a combination thereof.

3. The liquid entrapping device of claim 2 , wherein the at least one hydrophilic elastomeric fibrous component is selected from one or more zein proteins, polyester elastomers, polydimethylsiloxane, hydrophilic poly(ether-co-ester) elastomers, silicone-co-rx) lycthylcncglycol elastomers, thermoplastic silicone elastomers, polyacrylates, thermoplastic polyurethanes, poly(etha-co-urethancs), or combinations of two or more thereof.

4. The liquid entrapping device of claim 2 , wherein the at least one hydrophilic elastomeric fibrous component is selected from one or more polyurethanes, poly ether-co-urethanes, or combinations of two or more thereof.

5. The liquid entrapping device of claim 1 , wherein at least one wetting agent is selected from one or more soaps, alcohols, fatty acids, surfactants, glycerols, sugars, polysaccharides, and low molecular weight polymers, or mixtures of two or more thereof.

6. The liquid entrapping device of claim 1 , wherein the at least one wetting agent is selected from one or more non-ionic, anionic, cationic compounds, or mixtures of two or more thereof.

7. The liquid entrapping device of claim 1 , wherein me at least one wetting agent is selected from polyoxyethylene sorbitan monolaurate, glycerol, iorric silicone surfactants, quaternary polydimethyl siloxanes, or a combination of two or more thereof.

8. The liquid entrapping device of claim 1 , wherein the at least one wetting agent is a diquaternary polydimethyl siloxane.

9. The liquid entrapping device of claim 1 , wherein the at least one wetting agent is present in an amount from about 0.01 weight percent to about 1 weight percent based.

10. The liquid entrapping device of claim 9 , wherein the at least one wetting agent is present in an amount from about 0.025 weight percent to about 0.5 weight percent.

11. The liquid entrapping device of claim 9 , wherein the at least one wetting agent is present in an amount from about 0.05 weight percent to about 0.025 weight percent.

12. The liquid entrapping device of claim 9 , wherein the at least one wetting agent is present in an amount from about 0.075 weight percent to about 0.1 weight percent.

13. The liquid entrapping device of claim 1 , further comprising:
at least one absorbent component, wherein the absorbent component and the at least one hydrophilic elastomeric fibrous component are in physical proximity resulting in fluid communication, and wherein the at least one hydrophilic elastomeric fibrous component absorbs more quickly but has a smaller holding capacity than the at least one absorbent component.

Assignees

• Smith Daniel J
• Ring Horst
• Univ Akron
• Sns Nano Fiber Tech Llc

Inventors

• Smith Daniel J
• Ring Horst

Classifications

• D04H1/44

  the fleeces or layers being consolidated by mechanical means, e.g. by rolling · CPC title

• B32B2307/728

  Hydrophilic · CPC title

• D01D5/0985

  by means of a flowing gas (e.g. melt-blowing) · CPC title

• B32B2255/02

  on fibrous or filamentary layer · CPC title

• B32B2555/02

  Diapers or napkins · CPC title