Dry lubricant for conveying containers
The passage of a container along a conveyor is lubricated by applying to the container or conveyor a mixture of a water-miscible silicone material and a water-miscible lubricant. The mixture can be applied in relatively low amounts, to provide thin, substantially non-dripping lubricating films. In contrast to dilute aqueous lubricants, the lubricants of the invention provide drier lubrication of the conveyors and containers, a cleaner conveyor line and reduced lubricant usage, thereby reducing waste, cleanup and disposal problems.
1. A method for lubricating the passage of a container along a conveyor comprising applying a lubricant composition through non-energized nozzles, the lubricant composition comprising a mixture of from about 0.1 to about 10 wt. % of a water-miscible silicone material; from about 70 to about 99.9 wt % water; an antistatic agent; and an antimicrobial agent, wherein the lubricant composition is off for a period of time and on for a period of time and the ratio of off time to on time is at least 10:1.
2. The method of claim 1 , wherein the ratio of off time to off on time is at least 30:1.
3. The method of claim 1 , wherein the ratio of off time to on time is at least 180:1.
4. The method of claim 1 , wherein the ratio of off time to on time is at least 500:1.
5. The method of claim 1 , wherein the lubricant composition maintains a coefficient of friction of less than about 0.2 over a period of use.
6. The method of claim 1 , wherein the composition maintains a coefficient of friction of less than about 0.15 over a period of use.
7. The method of claim 1 , wherein the composition maintains a coefficient of friction of less than about 0.12 over a period of use.
8. The method of claim 1 , wherein the composition is diluted prior to applying the lubricant.
9. The method of claim 1 , wherein the container is selected from the group consisting of polyethylene terephthalate polyethylene naphthalate, glass, and metal.
10. The method of claim 1 , wherein the composition is applied to those portions of the conveyor that will contact the containers, or to those portions of the containers that will contact the conveyor.
11. The method claim of claim 1 , wherein the mixture has a total alkalinity equivalent to less than about 100 ppm CaCO 3 .
12. The method according to claim 1 , wherein the total alkalinity equivalent is less than about 30 ppm CaCO 3 .
13. The method of claim 1 , wherein the lubricant composition is applied by spraying.