Antimicrobial pre-moistened wipers
View Patent ↗A pre-moistened wiper that exhibits good antimicrobial kill at relatively small levels of antimicrobial agent is provided. In one embodiment, for example, the wiper contains a sanitizing formulation that includes between about 0.01% by weight to about 1% by weight of an antimicrobial agent, including a quaternary ammonium compound, and water. The sanitizing formulation is capable of being released from the wiper as a solution such that the quaternary ammonium compound is present within the solution in an amount less than about 2000 parts per million of the solution. The wiper can exhibit a log reduction for E. Coli of at least about 2.
1. A wiper comprising a nonwoven fabric and a sanitizing formulation applied to said nonwoven fabric in an amount from about 150% to about 600% of the dry weight of the wiper, said sanitizing formulation consisting essentially of one or more surfactants, between about 0.01% by weight to about 0.4% by weight of at least one benzalkonium halide, between about 0.01% to about 5.0% by weight of ethylenediaminetetraacetic acid and/or salts thereof, and a solvent;
wherein the one or more surfactants consist of one or more nonionic surfactants;
wherein said sanitizing formulation has a pH of greater than about 8 and is configured so that said formulation is released from said nonwoven fabric as a solution during use of the wiper in food service applications, said benzalkonium halide being present within said released solution in an amount less than about 2000 parts per million of said released solution, and wherein the wiper exhibits a Kill Efficiency Ratio for E. Coli, S. Aureus , or both of at least about 100.
2. A wiper as defined in claim 1 , wherein said one or more nonionic surfactants are present in an amount between about 0.01% to about 1% by weight of said sanitizing formulation.
3. A wiper as defined in claim 1 , wherein the wiper exhibits a Kill Efficiency Ratio for E. Coli, S. Aureus , or both of at least about 200.
4. A wiper as defined in claim 1 , wherein said benzalkonium halide is present in an amount of between about 150 to about 400 parts per million of said released solution.
5. A wiper as defined in claim 1 , wherein said benzalkonium halide is present in an amount of less than about 400 parts per million of said released solution.
6. A wiper as defined in claim 1 , wherein said nonwoven fabric contains cellulosic fibers.
7. A wiper as defined in claim 1 , wherein said benzalkonium halide has the following formula:
wherein,
R is a C 8 -C 18 alkyl group; and
A is a halogen atom.
8. A wiper as defined in claim 1 , wherein said solvent includes between about 0.001% to about 30% by weight of non-aqueous solvent.
9. A wiper as defined in claim 1 , wherein the pH of said sanitizing formulation is between about 9 to about 12.
10. A wiper as defined in claim 1 , wherein the wiper exhibits a log reduction for E. Coli of at least about 3.
11. A wiper as defined in claim 1 , wherein the wiper exhibits a log reduction for E. Coli of at least about 4.
12. A wiper as defined in claim 1 , wherein the wiper exhibits a log reduction for E. Coli of at least about 5.
13. A wiper as defined in claim 1 , wherein the wiper exhibits a log reduction for S. Aureus of at least about 3.
14. A wiper as defined in claim 1 , wherein the wiper exhibits a log reduction for S. Aureus of at least about 4.
15. A wiper as defined in claim 1 , wherein the wiper exhibits a log reduction for S. Aureus of at least about 5.
16. A wiper as defined in claim 1 , wherein the wiper exhibits a Kill Efficiency Ratio for E. Coli, S. Aureus , or both of at least about 100.
17. A wiper as defined in claim 1 , wherein the wiper exhibits a Kill Efficiency Ratio for E. Coli, S. Aureus , or both of at least about 400.
18. A wiper as defined in claim 1 , wherein said solvent consists of water.