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AssigneeEcolab Inc.
InventorsKimberly L. Person Hei, Joy G. Herdt, Minyu Li, Keith Darrell Lokkesmoe, Guang-Jong Jason Wei, Michael E. Besse
Estimating the term…
Thermally formed thermoplastic articles can be protected from stress cracking in the presence of stress cracking promoting compounds by forming a shaped article comprising a thermoplastic and a liquid hydrocarbon oil composition. We have found that the liquid hydrocarbon oil composition prevents the stress cracking promoting materials from interacting with the polymeric structure of the stressed container to prevent or inhibit stress cracking in such materials. The methods and compositions of the invention are particularly useful in preventing stress cracking in polyethylene terephthalate beverage containers during bottling operations during which the bottle is contacted with aqueous and non-aqueous materials such as cleaners and lubricants that can interact with the polyester to cause stress cracking particularly in the container base. A process for lubricating a container, such as a beverage container, or a conveyor for containers, by applying to the container or conveyor, a thin continuous, substantially non-dripping layer of a liquid lubricant. The process provides many advantages compared to the use of a conventional dilute aqueous lubricant.
A container, comprising a thermoplastic material subject to stress cracking, the container comprising a shaped article with a portion of the article under stress, the container comprising a thermoplastic resin and about 1 to 1000 milligrams, per gram of the thermoplastic, of a liquid hydrocarbon oil stress cracking inhibitor.
A container, comprising a thermoplastic material subject to stress cracking, the container comprising a shaped article with a portion of the article under stress, the container comprising a thermoplastic resin and a film on at least a portion of the container comprising about 1 to 1000 milligrams per gram of the thermoplastic of a liquid hydrocarbon oil stress cracking inhibitor.
A method of forming a shaped article having a stress crack inhibiting coating, the method comprises:
A method of lubricating a conveyor used in transporting thermoplastic containers, the method comprises conveying a thermoplastic container on a conveyor belt and applying to the conveyor belt a liquid hydrocarbon oil lubricant composition.
A method of inhibiting stress cracking in a thermoplastic shaped article, the method comprising lubricating the interface between the conveyor and the shaped article with a liquid hydrocarbon oil forming a lubricated article.
A method of lubricating the interface between a container and a moving conveyor surface, in the substantial absence of foamed lubricant and lubricant runoff, the method comprising:
Conveyor and container lubricant compositions comprising a mixture of a water- miscible silicone material and a water-miscible lubricant.
A conveyor lubricant composition comprising a mixture of an oleophilic lubricating material and a hydrophilic lubricant material, the composition comprising about 0.8 to about 4 wt % of the oleophilic lubricant and up to about 99.95 wt % of a hydrophilic lubricant composition.
A method for lubricating the passage of a container along a conveyor, comprising applying a phase-separating mixture of a conveyor lubricant composition comprising a mixture of an oleophilic lubricating material and a hydrophilic lubricant material, the composition comprising about 0.8 to about 4 wt % of a hydrophobic lubricant and up to about 99.95 wt % of a hydrophilic lubricant.
Dependencies are inferred from the claim text.