Application of common engineering plastics in auto parts

Polyamide (PA)

PA is mainly used in automobile engines and engine peripheral parts. The main varieties are glass fiber reinforced PA6, glass fiber reinforced PA66, reinforced flame retardant PA6 and other products.

(1) Application in automobile engine parts.

Engine heads, engine decorative covers, cylinder head covers and other components generally use modified PA as the preferred material. Compared with metal materials, the cylinder head cover as an example has a 50% reduction in quality and a 30% reduction in cost. In addition to engine parts, other stressed parts of the car can also use enhanced PA, such as oil filters, wipers, radiator grilles, etc.

(2) Application in peripheral parts of automobile engines.

Since the surrounding parts of the engine are mainly heat-generating and vibrating parts, most of the materials used in its parts are glass fiber reinforced PA. This is because PA has better comprehensive properties. The main properties of PA modified with glass fiber, such as strength, product accuracy, and dimensional stability, have been greatly improved.

　　 In addition, PA has many varieties, is easier to recycle and reuse, and is relatively cheap. These factors make PA an ideal material for engine peripheral components. The intake manifold is the most typical application of modified PA in automobiles. In 1990, the German BMW Motor Company first applied the intake manifold made of glass fiber reinforced PA as a raw material to a six-cylinder engine; Ford and DuPont of the United States In cooperation, the intake manifold made of glass fiber reinforced PA66 was applied to the V6 engine. In the future, major automobile companies in the world will follow up, and the modified PA intake manifold has been widely used.

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