Aerospace Duratron CU60 PBI Nacelles Wear Pad Challenge Avoid abrasion of the metal engine housing caused by opposing expansion and contraction requirements due to extreme temperature differences between engine and nacelle housing. The nacelle houses the propulsion unit and engine. Within this structure there is a requirement to compensate the differential expansion rate of the engine as it heats up and the nacelle as it is cooled by airflow. This is achieved by the use of static wear pads that are fixed at certain locations within the nacelle structure. The propulsion unit is then fixed in one area but allowed to expand against these wear pads in other areas. The wear pad material needs to be extremely hard wearing non-abrasive to contact surfaces withstand vibrations and excursions to high temperatures for short periods during reverse thruster operations. Nacelle Wear Pad Key Requirements Avoid abrasion of the contact surface Excellent wear and frictional behavior Effective operation from 40 to 300 C -22 to 572 F Retention of mechanical properties for service life Low coefficient of linear thermal expansion Customer Benefits Duratron CU60 PBI polymer wear pads protect expensive metallic or composite components from wear even at high temperatures of more than 350 C 625 F the material maintains its excellent wear properties Good shock and vibration absorbing properties of Duratron CU60 PBI help reduce noise Duratron CU60 PBI noticeably extends service life between replacements compared to softer materials Standard fasteners can be used for retention Our wear pads optimize the clearance between engine and housing and considerably improve the effectiveness of the engine mcam.com MCAMconnect contactmcam.com Our global MRP system controls the process from resin to finished part thus simplifying material certification and lot traceability mcam.com Distributed by 450 450 500 310 250 310 250 250 310 310 250 270 250 270 250 240 240 -20 -20 -20 -50 -50 -20 Ke
tron CA30 PEEK Ketron GF30 PEEK Ketron HPV PEEK Ketron 1000 PEEK The material processing and machining facilities in our dedicated Technology Centres are accredited to AS9100revD quality management system and offer finished parts supporting Buy to Fly programs -100 Duratron T4301 Our broad product portfolio and unique expertise in manufacturing engineering polymer shapes ensures the highest consistency of properties 0 Duratron T4203 Mitsubishi Chemical Advance d Materials Added Value 100 -20 Low thermal expansion 150 C CLTE mm.K 35 x 10-6 200 Duratron D7015G PI Extremely low wear rates for unfilled material -50 Method A ISO 75-1-2 300 Duratron D7000 PI Highest Heat Deflection Temperature 425 C 797 F 400 300 Working temperature range -50 to 310 C -58 to 590 F continuously up to 500 C 932 F for short periods of time 500 -50 Excellent retention of mechanical strength stiffness and creep resistance Min.Max. Service Temperature in Air Duratron CU60 Why Duratron CU60 PBI Max. allowable temperature for short periods a few hours Max. continuously allowable temperature 20.000 h Min. service temperature MCAMconnect contactmcam.com All statements technical information and recommendations contained in this publication are presented in good faith and are as a rule based upon tests and such tests are believed to be reliable and practical field experience. The reader however is cautioned that Mitsubishi Chemical Advanced Materials does not guarantee the accuracy or completeness of this information and it is the customers responsibility to determine the suitability of Mitsubishi Chemical Advanced Materials products in any given application. Techtron is a registered trademark of the Mitsubishi Chemical Advanced Materials group of companies. Design and content created by Mitsubishi Chemical Advanced Materials and are protected by copyright law. Copyright Mitsubishi Chemical Advanced Materials. All rights reserved. MCM AS 6 10.21.19
