Formasil® 45 Silicone Emulsion is an extremely stable, water-thin emulsion of methyl silicone oil that is replacing organic oils as a spray lubricant in the glass-container industry. It is being used successfully for the lubrication of all types of delivery equipment as well as for spraying the blank moulds of glass-forming machinery.
KEY PERFORMANCE PROPERTIES
- Applies a hydrophibic release film on substrates.
- Excellent lubrification properties.
- Easily water dilutable.
- Easy handling due to low viscosity.
- Effective on low dosage levels
Formasil® 45 is supplied as a 35 weight -% emulsion to be diluted with water. Slight paddle stirring is sufficient to effect complete dispersion of the concentrated emulsion. In areas where the tap water is corrosive because of excessive mineral content, 1/20 per cent of sodium nitrite may be added as a rust inhibitor. To prepare a batch of 100-to-1 dilution Formasil® 45 Silicone Emulsion for example, fill a clean 200L drum with 182 litres of water. Add 1.5 litres of Formasil® 45 Silicone Emulsion and stir. If local tap water mineral conditions require a rust inhibitor, mix 85 grammes of sodium nitrite in half a litre of the dilute water. Mix this concentrated aqueous solution into the 200L drum of diluted emulsion. As a good starting point, use the 100-to-1 dilution. From this beginning, vary the dilution to satisfy individual needs. The amount of silicone dilution varies widely in actual practice. So many factors are involved that it is not possible to make predictions that can apply in a general way. Typically, Formasil® 45 Silicone Emulsion diluted 220:1 is being used to lubricate the scoops, chutes, and deflectors of Hartford Empire IS machines. Water The purity of the water supply can affect build-up on shears and delivery equipment. Neither the total hardness nor total solids should exceed 220 ppm for best results. However, there are instances where harder water has been used successfully. Whether a given water supply can be used successfully should be determined by trial. In cases where local water supplies cause build-up, use of demineralised water is suggested. Zeolite-treated or softened water is not satisfactory, because the solids content is not decreased. Distilled water is satisfactory, but is usually more expensive than demineralising water.Steel and Cast Iron Delivery Equipment
To date, both cast iron and steel delivery equipment have been lubricated satisfactorily. In both cases, it is good practice to swab new equipment with undiluted Formasil® 45 Silicone Emulsion before placing it in service. Spray and Supply Systems
Many glass-container companies have found existing spray apparatus entirely adequate for using Formasil® 45 Silicone Emulsion to spray the delivery equipment of glass-forming machines. Others have found slight modifications desirable to take full advantage of the greater cooling capacity and other improvements that result from using Formasil® 45 Silicone Emulsion. For blank moulds, a special spray system is usually designed. Separate central supply systems are recommended for the delivery and shear spray. An ideal location for the main supply tanks is in the basement. For here, the dilute silicone can be pumped to a manifold system on the machine level. This arrangement permits preparation and storage of dilute emulsion in a cool place. The dilute emulsion is very stable and can be piped near furnaces, steam pipes, and the glass machine without breaking down or coagulating. However, bulk storage of dilute emulsion is not recommended where the ambient temperature exceeds 50°C.