Modified plastics in terms of flame retardancy, strength, impact resistance, toughness and other aspects of performance are superior to general plastics, downstream applications are extensive, among them, the automotive industry has become the fastest growing demand for modified plastics field. The global market value of automotive plastics is expected to increase to $46.112 billion in 2018, and consumption is expected to increase by 11.3 million tonnes, with a projected annual average growth rate of more than 15% for domestic automotive modified plastics in the coming years. This is mainly attributed to: first, the global auto production growth stability, and the second is the car light weight to increase the amount of bicycle modified plastic.
The main applications of modified plastics in the field of automotive lightweighting are as follows:
Instrument panel At present, the instrument panel mainly has the hard instrument panel and the soft instrument panel two kinds of forms, the soft instrument board is generally compared the high-grade automobile adoption, but the bus, the lorry and so on the model is basically uses the rigid instrument board. The instrument panel is generally made of modified PP material, and the modified PP is mainly based on rubber toughening agent and inorganic filler material. The instrument panel epidermis material mainly pvc/abs, the PVC is weak in the impact and heat resistance, the ABS mechanical properties and the molding processing ability is better, and with the PVC can combine,
The combination of the two can form complementary.
Door inner Panel At present, the more commonly used in the manufacture of door panels of modified plastic is ABS, PP, with them made into a skeleton, and the surface with a layer of buffer layer, buffer layer using PP foam, TPU, knitted polyester and so on.
In general, some Chevrolet models, skeleton, panels are made of glass fiber reinforced unsaturated polyester sheet molding plastic (SMC) materials, in some cars will be made of natural fiber and PP hot-pressing, this means can effectively reduce the weight of the door, reduce costs, noise performance has been significantly improved.
Body panels and chassis
Modified plastic body covering parts, compared with metal panels, the body more smooth, more accurate size, and quality, noise, vibration and other conditions can be more optimized, so the modified plastic in the roof, hood, luggage cover, etc. are widely used. In the car chassis, because of the need to withstand a large load, so the plastic has a large problem.
At present, mainly in the transmission suspension system, steering braking system of wear-resistant sports parts of the application of modified plastics, such as modified PBT, modified POM and other materials.
Bumper Car bumper is the use of modified materials, one of the main components, the current market most of the bumper are made of plastic products, bumper panels are pp, pc/abs, PC/PBT and other materials, skeleton is wood or metal materials, the middle part is PP foam material.
This kind of material from the environmental protection point of view is not conducive to recycling, through continuous innovation in the production of bumper panels can be used tpo, skeleton can be used glass fiber reinforced PP material, the middle part can use foamed pp, using the same properties of the material to make bumper, before the recovery as long as the cleaning and drying can be processed.
Fuel tank In the production of fuel tanks, modified plastics also play an important role, can be based on a certain proportion of resin, adhesives, PA and other materials, and then blow molding.
In addition, the use of ultra-high-molecular weight HDPE, copolymer PA, evoh resin and other materials to make fuel tank.
Engine Intake Manifold
At present, the modified plastics in the engine intake manifold is mostly manufactured using the aim process, in the Chrysler, Cadillac of some models of the engine, the intake manifold applied glass fiber reinforced Pa.
Automotive engine in the running temperature will continue to rise, so the engine around the components must withstand 220 degrees Celsius at the same time to maintain the high intensity, if it is in the colder weather also have to withstand low temperature performance, so generally use PA66 material to ensure the performance of plastic parts.
Clutch Actuator System Clutch because often work in high temperature environment and under the influence of pressure lubricants, traditional manufacturing process using metal materials, but in continuous testing, modified plastic clutch implementation system advantages more obvious, in the manufacture of clutch execution system using 50% long fiber reinforced black nylon lfrt raw materials,