As a measure of the amount of engineering plastics used in automobile's main role is to make the car lightweight, so as to achieve the oil saving speed. Developed countries the car with a plastic automotive design and manufacturing level of an important symbol, the world automobile plastic sheet, the largest amount of Germany, plastic consumption accounted for the overall material 15%. In recent years, China's automobile industry has developed rapidly, the current annual vehicle production of more than 400 million units, according to the foreign plastic consumption prediction, the car industry in modified plastics in 50 million tons of above, the engineering plastics accounted for a large proportion, the five major engineering plastics performance characteristics of each are not identical, in the car uses the emphasis.

One, nylon

Nylon is mainly used for automobile engine and engine peripheral components, the main varieties are GFPA6, GFPA66, reinforced flame retardant PA6 and other products. (1) in the peripheral part of the engine on the engine parts are mainly around the application due to heat and vibration components, the components of materials used mostly. This is because the glass fiber reinforced nylon nylon with comprehensive performance well, after using nylon modified glass fiber, the main performance has been greatly improved, such as strength, dimensional stability and accuracy of products, greatly improved. In addition, the nylon variety, easy recycling, the price is relatively cheap, these factors contributed to the ideal material of nylon parts. Around the engine intake the manifold is modified nylon in the car is the most typical application in 1990, the German car company BMW, the first reinforced nylon as raw material to produce the intake manifold applications in six with glass fiber Engine cylinder; after Ford and DuPont cooperation together with glass fiber enhanced PA66 manufacturing of intake manifold applications in the V6 engine, automobile companies around the world have to follow up, nylon intake manifold has been widely used. Compared to (2) in application of automobile engine parts. The engine cover, decorative cover of engine, cylinder head and other parts generally used modified nylon as material of choice, and metal material, to cylinder head for example quality reduce 50%, the cost is reduced by 30%. In addition to the engine parts and other stress components can also be used reinforced nylon, such as oil filter, wiper, radiator grille.

Two, polyester

Reduce the anti takeover in manufacturing cars in the,, enhanced and used widely in the automotive manufacturing field, PBT production bumper, carburetor components, fenders, spoiler, spark plug terminal board, fuel system parts, instrument panel, automobile igniter, the accelerator and clutch pedal and other components.PBT PA PC POM industry competition is very fierce, PA absorbent, PC heat resistance than PBT; automotive uses, because PBT absorbent is better than that of PA, will gradually replace pa. The relative humidity is high, very wet, due to damp easily cause plastic and electric device node is easy to cause corrosion, often can use modified PBT. At 80 DEG C, and 90% relative humidity, PBT can still normal use, and the effect is very good.

Ge PBT / PC alloy commodity name is Xenoy1731, in the senior car is the most widely used; it with good heat resistance should be stress cracking, has excellent abrasion resistance, chemical corrosion resistance, high and low temperature impact strength, easy processing and finishing of good, mainly used in high-grade car insurance insurance bar, chassis, panel and a motorcycle protection plate.

Three, poly formaldehyde

The automotive industry with POM.POM potential market quality of light, easy molding processing, low production cost, material properties and friction coefficient of metal are similar. The modified POM is very low, is very rigid; very suitable for manufacturing automotive car pump, carburetor parts, pipeline, power valve, 000 section bearings, motor gear, crank handle, dashboard, car window lifter device, electric switch, belt buckle. Manufacturing gears, bushings, slider wear parts are modified POM strengths, these parts of metal wear, reduce oil consumption, enhance the service life of the components; so it can be widely used to replace copper. Zinc metal production of bearings, gear, auto parts quality rod production of.POM light, low noise, simple assembly molding, therefore in the automobile manufacturing industry more and more widely used.

Four, polycarbonate

With high mechanical properties and good appearance, the modified PC is mainly used for external and internal parts in the car, and the most widely used is PC/ABS alloy and PC/PBT alloy.

(1) the car mounted PC / ABS alloy is the most suitable for automotive interior parts of the material. This is because the PC / ABS alloy with excellent heat resistance, impact resistance and rigidity, good processing flowability and manufacturing car dashboard ideal material.PC/ABS alloy hot deformation temperature of 110 DEG to 135 DEG C, can meet the tropical countries hot summer afternoon car in the park outside the heating requirements of alloy.PC/ABS good finishing and the covering film adhesion and therefore made of PC / ABS alloy dashboard no need to pre treat the surface, can be directly sprayed coating soft paint or coating coated PVC membrane.

PC/ABS alloy is also used in the manufacture of automotive instrument panel parts, anti freeze board, door handle, shade flow board, bracket, steering column jacket, decorative board, air conditioning system accessories and other auto parts.

And exhaust making alloy exterior and bumper material, PC (2) automobile fittings of PC / PBT Alloy and PC / Pet alloy with high heat resistance and high impact with PBT and pet resistance to chemicals, wear resistance and molding processing, thus making cars loaded ideal.PC/PBT automobile is resistant to - 30 DEG C below the low temperature impact, bumper fracture to ductile fracture and no debris. Elastomer toughening PC / PBT Blends of PC / Pet alloy is more suitable for the production of automobile body panels, automobile side guard plate, fenders, car door frame. High heat resistance of PC / PBT Alloy and PC / Pet alloy injection molding parts can not paint.PC/PET automobile export license plate.

PC / ABS alloy can also produce automotive exterior parts, such as the hood of the car wheels, mirrors the shell, rear cover.PC/ABS has a good shape can be auto processing large parts such as automobile fenders.

Five, polystyrene ether

Change of PPO in the car is mainly used as on heat resistance, flame resistance, electrical properties, impact properties, dimensional stability, mechanical strength requirements of the higher parts. Such as / PS alloy suitable for wet, load and the high requirements on the electrical insulation, good dimensional stability, suitable for manufacturing automobile wheel cover, headlight glass inlay groove, taillight shell and other components, but also suitable for manufacturing connecting boxes, fuse boxes, circuit breakers shell and other automotive electrical components.

PPO / PA alloy because of its excellent mechanical properties, dimensional stability, oil resistance, electric insulation, shock resistance. Can be used for the production of automobile parts, such as a large baffle, cushion, a rear spoiler and. The glass transition temperature higher engine cover PPO / PA alloy today after the application direction.

The hot deformation temperature of PPO/PBT alloy is high, and it is an ideal material for the manufacture of automotive panel.
The direction of the development of the automobile industry is the high-grade, miniaturization, lightweight and diversified to plastic instead of steel in automotive applications research has become very active. At present domestic automobile plastics accounted for an average of 7% of the total material, Germany, the proportion in 15%; we need to increase research and development efforts, so that parts of the structure design, plastic material selection and industry synchronization development.