SarasilTM - Silicone Spinneret Spray
SARASILTM Silicone Spinneret Spray is a propriety aerosol product having High Viscosity Silicone Oil as its primary ingredient.
The main feature of the Silicone oil used in the product is its thermal stability and resistance to oxidation and charring in exposed conditions at high temperatures (exceeding 3000C). The Silicone Oil forms a thin film on the spinneret surface and maintains its effect for a long duration due to its heat stability and low volatility.
The heat stable silicone oil is used in conjunction with non toxic and non flammable solvents to impart mobility to the viscous silicone fluid. The multi effect of the combination of solvents is the dispersion of silicon oil molecule to form a thin uniform film on the spinnerets surface and to enhance the spread ability of the silicone oil while applying and cleaning the spinneret surface.
Another important role of the solvents used in SARASILTM is to clean the surface and fine holes of the spinnerets by penetrating inside and removing the greasy film of oligomers and burnt polymers. The solvents being highly volatile liquids get evaporated leaving only a thin uniform film of silicone oil inside the holes and surface of spinnerets.
The role of gases (known as Propellants) in SARASILTM is dual purpose. The main purpose of the propellants is to discharge the liquid mixture from the pressurized aerosol container in the form of fine spray or mist. This process is known as atomization and helps deposit the product on the spinneret. Secondly, the deodorized Hydrocarbon or Fluorocarbon based Propellants are good solvents for silicone oil and also serve as effective degreasers and cleaners and help in cleaning the spinneret surface and holes.
ROLE OF VISCOSITY IN SILICONE OIL
While there is no important and initial role of viscosity of silicone fluids in the performance while being used on spinneret, the viscosity temperature coefficient is a very important parameter and determines the quality of silicone oil and performance at temperatures in excess of 3000C. SARASIL® uses a superior grade of silicone oil that has a viscosity temperature coefficient which maintains even viscosity at high temperatures during application, hence maintaining the lubricity.
The most critical property of silicone oil used in SARASIL is the stability of the oil at high temperatures in open exposed conditions. Typically, high temperature and presence of air cause oxidation and gelation of silicone oil making it effective only for a very short duration, hence, making the product ineffective. SARASILTM uses highly heat stable silicone oil maintaining the liquid state of oil even at high temperatures in excess of 3000C for up to 96 hours.