Low friction glove for easy double gloving

Patent metadata

Field	Value
Publication number	US-11666106-B2
Application number	US-201816205421-A
Country	US
Kind code	B2
Filing date	Nov 30, 2018
Priority date	Nov 30, 2018
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

An elastomeric article includes a first surface and a second surface which is treated with a friction treatment. The elastomeric article can be a glove in which the first surface is an inner donning surface and the second surface is an outer grip surface. The friction treatment reduces friction on the grip surface of the gloves in order to make it easier to don a second glove on top of the grip surface of the gloves of the present invention. The gloves of the present invention may be used as a first pair of gloves in a double-gloving configuration to conform with safety protocols.

First claim

What is claimed is:

1. An elastomeric article comprising:
an article comprising a flexible layer of elastomeric nitrile rubber formed from a nitrile rubber emulsion, the article having a first surface and a second surface;
wherein the first surface and the second surface are chlorinated, wherein chlorination of the first surface and chlorination of the second surface are accomplished with different chlorine solutions, wherein chlorination of the first surface is accomplished by dipping the first surface into a sodium hypochlorite solution followed by dipping the first surface into a tank of hydrochloric acid;
wherein the second surface is treated with a friction treatment that reduces the level of friction of the second surface to improve the ease with which a second elastomeric article can slide on top of the second surface, wherein the friction treatment of the second surface comprises the chlorination of the second surface, wherein the second surface has a static coefficient of friction in a range from about 0.3 to about 0.9 or a dynamic coefficient of friction in a range from about 0.3 to about 1.

2. The elastomeric article of claim 1 , wherein the article is a glove.

3. The elastomeric article of claim 2 , wherein the first surface is a donning side of the glove and the second surface is a grip side of the glove.

4. The elastomeric article of claim 1 , wherein the second surface is chlorinated with a solution of chlorine gas in water.

5. The elastomeric article of claim 1 , wherein the nitrile rubber emulsion includes a solids content of between about 15 percent and about 30 percent, by weight.

6. The elastomeric article of claim 1 , wherein the nitrile rubber emulsion includes a defoamer.

7. The elastomeric article of claim 1 , wherein coagulation of the nitrile rubber emulsion to form the elastomeric article is accelerated by a metallic salt, wherein the metallic salt includes nitrate, sulfate, or chloride salts of calcium, aluminum, or zinc, or a combination thereof.

8. The elastomeric article of claim 1 , wherein the friction treated second surface has less friction compared to an identically formed elastomeric article that has not been treated with the friction treatment.

9. A process for making an elastomeric article, the process comprising steps of:
coating a surface of a former with a coagulant solution;
immersing the former into a nitrile rubber emulsion to form a layer of coagulated nitrile rubber on the former surface, the coagulated nitrile rubber forming an elastomeric article on the former, the elastomeric article having a first surface that is exposed from the former and a second surface contacting the former;
chlorinating the first surface of the elastomeric article, wherein chlorinating the first surface comprises dipping the former containing the elastomeric article into a first solution of sodium hypochlorite, then transferring the former containing the elastomeric article to a tank containing a second solution of hydrochloric acid;
curing the elastomeric article;
removing the elastomeric article from the former and inverting the elastomeric article such that the chlorinated first surface of the elastomeric article becomes an interior surface of the elastomeric article; and
subjecting the inverted elastomeric article to a friction treatment to reduce the friction of the second surface of the elastomeric article, wherein the second surface has a static coefficient of friction in a range from about 0.3 to about 0.9 or a dynamic coefficient of friction in a range from about 0.3 to about 1 wherein the friction treatment of the second surface comprises chlorination of the second surface.

10. The process of claim 9 , wherein the elastomeric article is a glove, further wherein the first surface forms a donning surface of the glove and the second surface forms a grip surface of the glove.

11. The process of claim 9 , wherein the nitrile rubber emulsion includes a solids content of between about 15 percent and about 30 percent, by weight.

12. The process of claim 9 , wherein the nitrile rubber emulsion is pigmented such that the elastomeric article is colored by the pigment.

13. The process of claim 9 , wherein the step of immersing the former into the nitrile rubber emulsion lasts for a dwell time sufficient to form a layer of coagulated nitrile rubber on the former surface having a thickness in the range of about 0.06 mm to about 0.14 mm.

14. The process of claim 9 , wherein the first solution comprises from about 1.5 wt % to about 4.5 wt % sodium hypochlorite, and the second solution comprises from about 0.1 wt % to about 1.5 wt % hydrochloric acid.

15. The process of claim 14 , wherein the former containing the elastomeric article is dipped into a series of water tanks at about 85° C. to about 95° C. after the step of transferring the former containing the elastomeric article to the tank containing the second solution.

16. The process of claim 9 , wherein the friction treatment comprises immersing the inverted elastomeric article into a chlorinating bath to chlorinate the former surface of the elastomeric article.

17. The process of claim 16 , wherein the step of immersing the inverted elastomeric article into the chlorinating bath comprises transferring the inverted elastomeric article to a tank containing a chlorine solution containing about 600 ppm to about 2200 ppm of chlorine gas dissolved in water and tumbling the elastomeric article in the solution within the tank.

18. The process of claim 17 , further comprising draining the chlorine solution to waste and filling the tank with water to clean the chlorinated elastomeric article of any residual chlorine left on the second surface of the elastomeric article.

19. A kit for double-gloving, the kit comprising:
a first elastomeric glove formed from a flexible layer of elastomeric nitrile rubber formed from a nitrile rubber emulsion, the glove having a chlorinated first surface and a friction treated second surface, wherein the chlorination of the first surface and the friction treatment of the second surface are accomplished with different chlorine solutions, wherein chlorination of the first surface is accomplished by dipping the first surface into a sodium hypochlorite solution followed by dipping the first surface into a tank of hydrochloric acid; and
a second elastomeric glove for donning on top of the first elastomeric glove;
wherein the friction treatment of the second surface of the first elastomeric glove reduces the level of friction of the second surface to improve the ease with which the second elastomeric glove can slide on top of the second surface to don the second elastomeric glove on top of the first elastomeric glove, wherein the second surface has a static coefficient of friction in a range from about 03 to about 0.9 or a dynamic coefficient of friction in a range from about 0.3 to about 1 wherein the friction treatment of the second surface comprises chlorination of the second surface.

Assignees

• O & M Halyard Inc

Inventors

• Robert Patrick H
• Modha Shantilal Hirjibhai
• Issara Sopha
• Solan Ryan S
• Henderson Mary Rachel

Classifications

• A41D19/0075

  permitting handling and containing of waste materials · CPC title

• A41D19/043

  Glove-turning machines (turning inside-out of tubular articles D06G3/00) · CPC title

• A41D2400/44

  Donning facilities · CPC title

• A61B42/10

  Surgical gloves · CPC title

• A41D2500/52

  in sheet form · CPC title