By Gary Thomas
An innovative low-density silicone developed by Simrit, a division of Freudenberg-NOK Sealing Technologies, has been successfully used in aircraft nacelle systems. The silicone material was developed in response to the growing customer demand for light weight sealing components. Weight reduction has turned out to be a key factor in aircraft design due to the rising operational and environmental conditions.
Nacelle systems are important in aircraft to achieve the overall efficiency and also to save weight and improve fuel economy. Simrit formulated AMS 3302 and AMS 3303 cost-effective silicone to offer weight savings in the range of 15%-20%. This material has physical properties similar to traditional silicone materials and has a specific gravity below one. It is resistant to common aircraft fluids and has an ability to withstand very low and high temperatures. The low-density silicone is suitable for several aerospace sealing applications, including environmental sealing of nacelle systems and airframe seals. The material can be integrated into fireproof constructions.
Simrit manufactures the low-density silicone material at its Nadcap-approved facility located in Tillsonburg, Ontario, Canada. The plant designs and produces aerodynamic seals and various other sealing products, including window and door seals, thrust reverser seals and engine seals for use in commercial jet and aircraft engines. The Tillsonburg facility has the AS9100 Revision C quality management system certification, which includes design for the aerospace sector.