Latex gloves and articles with geometrically defined surface texture providing enhanced grip and method for in-line processing thereof

• US 8,522,363 B2
• Filed: 10/19/2010
• Issued: 09/03/2013
• Est. Priority Date: 01/12/2005
• Status: Active Grant

• Current Assignee: Ansell Healthcare Products LLC (Ansell Limited)
• Original Assignee: Ansell Healthcare Products LLC (Ansell Limited)
• Inventors: Hassan, Noorman Abu, Lucas, David M., Shani, Fazli, Narasimhan, Dave
• Primary Examiner(s): MORAN, KATHERINE M
• Application Number:
  US12/925,313
• Publication Number:
  US 20110088140A1
• Time in Patent Office: 1,050 Days
• Field of Search: 216/11, 216/16, 216/7, 264/305
• US Class Current: 2/167
• CPC Class Codes: A41D 19/0058 Three-dimensional gloves
• CPC Class Codes: A41D 19/01547 with grip improving means
• CPC Class Codes: A61B 42/00 Surgical gloves; Finger-stalls specially adapted for surgery; Devices for handling or treatment thereof
• CPC Class Codes: A61B 42/60 Devices for cleaning, washing, drying or powdering
• CPC Class Codes: B29C 2059/028 Incorporating particles by impact in the surface, e.g. using fluid jets or explosive forces to implant particles
• CPC Class Codes: B29C 41/14 Dipping a core B29C41/10 takes precedence
• CPC Class Codes: B29C 59/02 by mechanical means, e.g. pressing B29C59/007 takes precedence; embossing expanded porous articles B29C44/5627
• CPC Class Codes: B29D 99/0067 Gloves
• CPC Class Codes: B29K 2105/0064 Latex, emulsion or dispersion
• CPC Class Codes: B29K 2995/0072 Roughness, e.g. anti-slip
• CPC Class Codes: B29L 2031/4864 Gloves

Abstract

Latex articles with geometrically defined surface structure providing enhanced grip characteristics in dry, wet or oily environment; and a method of making same comprising applying a polymeric coagulant coating to a smooth former surface, wherein the coating becomes tacky during drying, applying discrete coagulant particles of selected size, shape and distribution to the tacky coating to attach and protrude from the former surface with the polymeric coagulant coating, dipping the former into an aqueous latex emulsion, wherein the polymeric coagulant coating and the discrete coagulating particles destabilize the latex, thereby developing a latex layer, vulcanizing and stripping the latex article inside out, and dissolving the discrete coagulant particles in water or suitable solvents to reveal the geometrically designed texture with pre-selected size, shape and distribution of impressions providing improved dry, wet and oily surface grip by removal of a fluid boundary layer.

Claims

1. A latex glove comprising:

an outer surface and an inner surface;

the outer surface having a plurality of indentations, of which a plurality have re-entrant openings, such that the interior size of the indentations is larger than the size of their respective outer surface openings, wherein-the indentations provide a surface texture on a portion of the outer surface;

wherein the surface texture provides improved dry, wet, or oil surface-gripping characteristics.

2. The latex glove of claim 1, wherein the glove includes a uniform distribution of the plurality of indentations on the outer surface of the glove.

3. The latex glove of claim 1, wherein a finger area of the glove comprises the surface texture.

4. The latex glove of claim 3, wherein a thumb area of the glove comprises the surface texture.

5. The latex glove of claim 4, wherein a palm area of the glove comprises the surface texture.

6. The latex glove of claim 3, wherein a palm area of the glove comprises the surface texture.

7. The latex glove of claim 1, wherein a palm area of the glove comprises the surface texture.

8. The latex glove of claim 7, wherein a thumb area of the glove comprises the surface texture.

9. The latex glove of claim 1, wherein a thumb area of the glove comprises the surface texture.

10. The latex glove of claim 1, wherein the inner surface comprises an adhesively-bonded cotton or rayon flock, the inner surface thereby providing improved skin moisture absorption and skin irritation resistance.

11. The latex glove of claim 1, wherein the inner surface comprises with a layer of cured foam latex, the inner surface thereby providing improved skin moisture absorption and skin irritation resistance.

12. The latex glove of claim 1, wherein the inner surface comprises an adhesively-bonded knitted liner which comprises an aramid fiber, a polyethylene fiber, a steel fiber, or combinations thereof, the inner surface thereby providing cut-resistance.

13. The latex glove of claim 1, wherein the surface texture comprises indentations including ones with re-entrant openings that interconnect to form a channel.

14. The latex glove of claim 1, wherein the plurality of indentations have sharply defined internal edges that are replicated from sharp edges of crystals of discrete coagulant particles.