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US 7,730,554 B2Granted
Double dipped gloves
AssigneeEncompass Medical Supplies, Inc.
InventorNicholas Wang
Life of this patent
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Abstract
A method of making a glove is described. The method comprises dipping a glove form into two different formulations. Each formulation comprises a carboxylated nitrile butadiene rubber with different amounts of covalent and ionic cross linkers. The gloves preferably have a stress retention value of greater than 50%.
Claims19
A glove, comprising:
- a first layer formed from a first composition comprising a first nitrile butadiene rubber;
- and
- a second layer formed from a second composition comprising a second nitrile butadiene rubber;
- wherein the glove exhibits a stress retention of greater than 50%, said stress retention being the percentage retention of the initial stress after six minutes at 100% extension of the glove, the first nitrile butadiene rubber composition comprises a first amount of a metal oxide ionic cross-linking agent, the second nitrile butadiene rubber composition comprises a second amount of the metal oxide ionic cross-linking agent, the first amount of the metal oxide ionic cross-linking agent present in the first nitrile butadiene rubber composition is less than the second amount of the metal oxide ionic cross-linking agent present in the second nitrile butadiene rubber composition, the first nitrile butadiene rubber composition further comprises a first amount of a covalent cross-linking agent, the second nitrile butadiene rubber composition further comprises a second amount of the covalent cross-linking agent, the first amount of the covalent cross-linking agent present in the first nitrile butadiene rubber composition is less than the second amount of the covalent cross-linking agent present in the second nitrile butadiene rubber composition, and the glove has a tensile strength of from about 15 MPa to about 25 MPa and an ultimate elongation of from about 550% to about 650%.
1 more element
Dependencies are inferred from the claim text.