Cut resistant polymeric films

• US 6,021,524 A
• Filed: 12/31/1997
• Issued: 02/08/2000
• Est. Priority Date: 12/31/1997
• Status: Expired due to Term

• Current Assignee: University of Akron
• Original Assignee: University of Akron
• Inventors: Harris, Frank W., Cheng, Stephen Z. D., Wu, Zongquan
• Primary Examiner(s): VANATTA, AMY B
• Application Number:
  US09/002,011
• Time in Patent Office: 769 Days
• Field of Search: 2/167, 2/168, 2/161.7, 2/161.6, 2/159, 2/161.1, 2/164, 2/2.5, 2/16, 428/113, 428/109, 428/911
• US Class Current: 2/167
• CPC Class Codes: A41D 19/0058 Three-dimensional gloves
• CPC Class Codes: A41D 19/0096 Means for resisting mechanical agressions, e.g. cutting or piercing
• CPC Class Codes: Y10T 428/24995 Two or more layers

Abstract

A polymeric film having increased cut resistance comprising a polymeric matrix having dispersed therein a plurality of cut resistance enhancing fibers. These films are preferably made into gloves, for example medical or industrial gloves.

Claims

1. A medical glove having improved cut resistance comprising:

at least three dipped formed elastomeric layers combined to form the entire glove, the at least three elastomeric layers including an innermost layer, an outermost layer, and a middle layer, wherein the middle layer contains a three dimensional network of chopped fibers randomly dispersed throughout for enhancing the glove'"'"'s cut resistance.

2. A medical glove, as set forth in claim 1, where said fibers for enhancing the glove'"'"'s cut resistance are selected from the group consisting of glass fibers, steel fibers, aramid fibers, polyethylene fibers, particle filled polymeric fibers, and mixtures thereof.

3. A medical glove, as set forth in claim 2, wherein said fibers are particle filled polymeric fibers.

4. A medical glove, as set forth in claim 2, wherein said fibers are ultra high molecular weight polyethylene fibers.

5. A medical glove, as set forth in claim 1, wherein at least one layer of said at least three elastomeric layers comprises a polymer selected from the group consisting of natural rubber, polychloroprene, styrene-isoprene-styrene block copolymers, styrene-ethylene butylene-styrene block copolymers, styrene-butadiene-styrene block copolymers, polyurethane, polyurea, nitrile rubber, vinyl chloride based polymers and mixtures thereof.

6. A medical glove, as set forth in claim 5, wherein said polymer is natural latex.

7. A medical glove, as set forth in claim 5, wherein said polymer is a mixture of styrene-isoprene-styrene and styrene-ethylene butylene-styrene block copolymers.

8. A medical glove, as set forth in claim 1, wherein said glove'"'"'s cut resistance is increased by at least about 20 percent by the addition of about 2 to about 20 weight percent of said fibers.

9. A medical glove, as set forth in claim 1, wherein said at least three elastomeric layers comprises a polymer that is a mixture of styrene-butadiene-styrene and styrene-isoprene-styrene block copolymers.

10. A medical glove, as set forth in claim 1, wherein said glove contains from about 2 to about 20 percent fiber based on the entire weight of the glove.

11. A medical glove, as set forth in claim 1, wherein said at least three elastomeric layers define a single layer palm thickness of the glove from about 0.08 to about 0.4 mm, a single layer finger thickness from about 0.08 to about 0.45 mm, and a single layer cuff thickness of the glove from about 0.08 to about 0.2 mm.

12. A medical glove, as set forth in claim 1, wherein the tensile strength of the glove is at least about 17 MPa, the elongation of the glove is at least about 650 percent, and the 500% modulus of the glove is less than about 7 MPa.

13. A medical glove, as set forth in claim 1, wherein the tensile strength of the glove is at least about 24 MPa, the elongation of the glove is at least about 750 percent, and the 500% modulus of the glove is less than about 5.5 MPa.

14. A medical glove, as set forth in claim 1, where said fibers have a length of from about 0.1 mm to about 5.0 mm.

15. A medical glove, as set forth in claim 1, where said fibers have a denier that is from about 1 to about 10.

16. A glove having increased cut resistance comprising:

at least one polymeric layer, wherein the at least one polymeric layer includes chopped fibers that are randomly dispersed therein thus forming a glove having cut and puncture resistance throughout.

17. A glove, as set forth in claim 16, wherein said polymeric layer comprises a polymer selected from the group consisting of natural rubber, polychloroprene, styrene-isoprene-styrene block copolymers, styrene-butadiene-styrene block copolymers, styrene-ethylene butylene-styrene block copolymers, polyurethane, polyurea, nitrile rubber, vinyl chloride based polymers, and mixtures thereof.

18. A glove, as set forth in claim 16, wherein said fibers are selected from the group consisting of glass fibers, steel fibers, aramid fibers, polyethylene fibers, particle filled polymeric fibers, and mixtures thereof.

19. A glove, as set forth in claim 16, where a single layer palm thickness of the glove is from about 0.08 to about 0.2 mm.

20. A medical glove having improved cut resistance comprising an innermost layer, an outermost layer, and a middle layer therebetween, where the middle layer extends throughout the entire glove and includes a three dimensional network of chopped fibers randomly dispersed throughout for enhancing the cut resistance of the glove.

21. A medical glove, as set forth in claim 20, wherein each of the plurality of chopped fibers has a thickness dimension ranging from about 0.1 mm to about 0.2 mm and includes a length dimension from about 0.1 mm to about 5 mm.

22. A medical glove, as set forth in claim 20, wherein each of the plurality of chopped fibers has a denier ranging from about 1 to about 10.