Water spray systems conventional

If the compound being extruded is not attacked by water, for example, conventional butadiene-acrylonitrile based compounds, the preforms are passed through a water cooling system. The water cooling system can be using either the spray technique or complete submersion. 

Among the main sources of the pollution of ecological systems, conventional use of pesticides in agriculture, forestry and water systems, and public health care and hygiene, should be considered. This concerns particularly aerial large-scale spraying of fields and forests, and the frequent application of pesticides to waters to control the carriers of diseases or aquatic plants in irrigation systems. 

A third example is the ICI patented use of core shell emulsions for use in internal can lacquers. The particles are not as easily deformed during high pressure airless spray applications as are conventional water based systems. The shell could contain a crosslinking comonomer such as n-methylolacrylamide to enable the emulsion to be self crosslinking when stoved. 

In addition to the excellent performance properties and the reduction of solvent carriers, waterborne epoxy adhesives were found to have processing advantages. They could be easily applied by conventional coating systems (spray, roller, etc.) they were less hazardous to workers due to lower dermatitis potential and inflammability ventilation equipment costs could be reduced and application equipment could be easily cleaned with soap and water. In many applications, these processing advantages became the primary market drivers for waterborne epoxy adhesives as alternatives to more conventional adhesives. 

The NOx concentrations were measured using a combination of the MS analysis system and a conventional fluw gas analyser. With CEB NOx-reduction levels of 18 and 38 % could be realised at a Ca S ratio of 1 and 2 respectively. In con arison, a reduction of only approx. 12% was realised when spraying water in the flame, at a similar water-to-oil ratio con arable with the CEB experiments. 

With rotational molding, a closed mold is rotated in two or more planes during fusion or solidification of the fluid polymer system. The action of the rotation deposits an even coating of polymer upon the inside of a "clam shell" type mold. After a predetermined time under heat, the molds are removed from the oven and cooled, and the finished product is removed whereupon the cycle is started again. Conventional gas fired ovens or hot salt bath sprays are used for heat transfer, and cooling is usually effected by spraying or immersion in cold water. This technique is well suited to molding completely hollow objects. 

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