More particularly, the invention relates to water-based lubricants for conveyor belts for the drinks industry. Lubricants for conveyor belts for the drinks industry have to meet high demands, especially with regard to their fitness for contact with and compatibility with food and drink. This comprises silicone emulsions that are diluted with water. According to the degree of dilution, this is then referred to as wet or semidry lubrication.
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More particularly, the invention relates to water-based lubricants for conveyor belts for the drinks industry. Lubricants for conveyor belts for the drinks industry have to meet high demands, especially with regard to their fitness for contact with and compatibility with food and drink. This comprises silicone emulsions that are diluted with water.
According to the degree of dilution, this is then referred to as wet or semidry lubrication. In the case of wet lubrication with typical dilutions of the lubricant of to , water consumption is very high. The case of dilution of less than is referred to as semidry lubrication.
In both cases, it should be noted that the hardness of the water added has a crucial effect on the performance and compatibility of the lubricant with the packaging material transported. Accordingly, in the case of a wet or semidry lubricant, it is typically necessary to add elevated amounts of free organic acids in order to neutralize the water hardness-related alkalinity.
However, disadvantages of emulsions or suspensions are that stirrer units are frequently required in the blending with water, and that they have poorer storage stability than homogeneous solutions. Moreover, it is not possible to achieve a continuous film of the lubrication-active component on the conveyor chain, which has an adverse effect on the tribological properties. A common factor to all lubricants mentioned is the relatively complex cleaning of the conveyor belts.
One aim of the present invention was therefore to provide a highly tribologically effective lubricant formulation which is effective in very small amounts and need not be diluted further with water.
Thus, a maximum saving of water is possible. Furthermore, the formulation of the invention is biodegradable and usable in the food and drink sector. The formulation is additionally storage-stable, fully soluble in water and easy to remove from the conveyor belts. No solids and no water-insoluble components are present.
The water-based lubricant composition of the invention has good biodegradability and environmental compatibility in an aqueous environment. Moreover, it features good compatibility with application-related materials, such as chain materials, application technology and packaging. The low-temperature characteristics of the aqueous lubricant composition of the invention can be considerably improved by addition of antifreezes, for example low molecular weight glycol or glycerol.
In addition, it is possible to add additives in order to control the properties of the lubricant composition of the invention. If desired, the aqueous lubricant compositions of the invention can also be formulated in a foam-free manner. The lubricant composition of the invention may also comprise 0. The viscosifying component of the lubricant composition of the invention is selected from the group consisting of water-soluble carboxylic esters, or a mixture of water-soluble carboxylic esters and low molecular weight polyalkylene glycols.
Preference is given to using water-soluble ethoxylated esters of dicarboxylic acids that are sold under the Nycobase name by Nyco S. The low molecular weight polyalkylene glycols used are preferably a polyethylene glycol having a mean molar mass of , which are sold by Clariant Deutschland GmbH under the PG name. For prevention of foam formation, it is possible to use additives, for example polydimethylsiloxanes or polymers of acrylate derivatives.
In addition, lubricant composition of the invention may comprise biocides, for example isothiazolone derivatives. According to the application, it is also possible to use fragrances which are selected from the group consisting of alcohols, aldehydes, ketones, esters, alkenes, salts, e. Especially preferably, the lubricant composition of the invention comprises 7. The lubricant composition of the invention ensures that the performance of the lubricant is not significantly impaired even by production-related flashing with water.
The lubricant composition of the invention additionally features excellent sprayability which can also be employed in unpressurized nozzles and minimizes the risk of blockage of nozzles. Moreover, application is possible by all standard methods, for example nozzles operated with or without compressed air, brushes, slide plates.
The lubricant composition of the invention has excellent compatibility with standard packaging, chain materials and application techniques. Furthermore, in the case of use of the lubricant composition of the invention, a distinct improvement is achieved in storage and transport stability, with regard to the effect of temperature and vibration.
The lubricant composition of the invention is also excellent with regard to biodegradability. The lubricant composition of the invention is described in detail hereinafter with reference to examples. Example 1.
Biocides - Household
For emulsions and synthetic solutions. Industries Note The information shown on this side is based on the experience and expertise of the FUCHS Group in the development and manufacture of lubricants and represents the current state of the art. The performance of our products can be influenced by a series of factors, especially the specific use, the method of application, the operational environment, component pretreatment, possible external contamination, etc. For this reason, universally valid statements about the function of our products are not possible. The information given here represents general, non-binding guidelines. No warranty expressed or implied is given concerning the properties of the product or its suitability for any given application. We therefore recommend that you consult a FUCHS Group application engineer to discuss application conditions and the performance criteria of the products before the products are used.
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