Enhanced Durability for Extreme Environments - Engine Covers
Superior resistance to aggressive chemicals and extreme temperatures, great surface appearance and low cost of processing make the DuPont™ Zytel® family the ideal material for sealed and unsealed engine and driveline covers and housings.
The Zytel® high performance polymer family offers outstanding performance with Zytel® PA and Zytel® HTN PPA resins for many applications. For the highest levels of durability and resistance, DuPont Performance Polymers offers five grades of Zytel® PLUS nylon and two grades of Zytel® HTN92 Series resins based on DuPont™ SHIELD Technology. This technology provides the highest level of durability and performance required for the most demanding engine covers and housings. These lightweight materials help eliminate the use of metal in many applications not previously possible, while also decreasing production costs and increasing service life. Despite the lightweight properties of Zytel®, it can handle long-term exposure to temperatures up to 230°C and to aggressive chemicals, such as hot oil and calcium chloride.
Sealed Engine and Driveline Covers and Housings
Engine covers and housings provide the function as an effective seal containing critical gases and fluids, and they perform many additional functions such as vibration isolation, pressure regulation of blow-by-gases, the extraction and return of oil-mist from blow-by-gases and a attaching locations to secure other components. Zytel® has the high dimensional stability, high temperature and fluid resistance and heat deflection temperature necessary to accommodate the various functions of engine covers and housings. In addition to the engine covers, Zytel® can also be a perfect choice for covers and housing used in other driveline systems, such as transmissions, transfer cases and differentials. Where even higher levels of strength, stiffness and dimensional stability are required, Zytel® PA and Zytel® HTN PPA resins contain long-glass fiber reinforcement provide a great lightweight alternative to metals. All these materials have been thoroughly tested with regard to heat aging, fatigue leakage and mechanical strength, and have excelled in all the tests. Zytel® is able to withstand the high temperatures and pressures found in diesel engines, and it outperforms its aluminum counterparts. Five injection-molded parts can replace a multitude of individual aluminum parts, reducing production and assembly costs as well as product weight.
Zytel® nylon has also been successfully used in place of metal for a front cover for a turbo-diesel engine. The Zytel® front cover offers the necessary mechanical strength to withstand the assembly process and the heat and chemical resistance to endure the engine bay environment.
Non-Sealed Acoustic Engine Covers
Zytel® PLUS nylon is used in award-winning, non-sealed acoustic engine covers. It provides a high-gloss, uniform appearance and high standard mechanical properties despite long-term exposure to extreme temperatures common in turbo engines. In addition, Zytel® products can be assembled efficiently and accurately, while providing significant savings in cost and weight.
INFORMATION & IDEAS
From material selection to tolerances, the Plastic Design Guide details 10 top tips for effective design, efficient production, and successful products.
Molding guide for Zytel® HTN family of resins, which are based on similar, but structurally different semicrystalline, partially aromatic polyamide copolymers.