Maitian
Solution
27
2024
-
11
Application of modified nylon in the automotive industry!
Author:
In order to improve the safety performance of automobiles, reduce body weight, and save costs, many auto parts and accessories will use modified nylon materials instead of metal materials. Safety performance, comfort, corrosion resistance and fatigue resistance have been improved. Some car parts also need to be painted on the surface. Let's look at the use and performance requirements of modified nylon in auto parts and accessories.
Parts around the car engine and requirements for plastics. The engine is the "heart" of the car, so the requirements for the materials used in its surrounding parts are very strict. First of all, due to heat radiation, conduction and convection, these components must withstand a long-term high temperature environment, usually around -40 ℃ ~ 140 ℃; at the same time, it must also withstand the impact of flying sand on the road; it should also be resistant to the erosion of automobile oil, Such as gasoline, diesel, lubricating oil, detergent, long-lasting antifreeze, brake fluid, battery acid, various additives in oil, alcohols, high temperature water, etc; in order to withstand the pressure and vibration load, due to the reduction of the overall size of the engine and the reduction of the engine compartment, the volume and mass of the vehicle can be reduced to achieve the purpose of reducing energy consumption. However, as the number of cars decreases, the firewall becomes thinner, and the vibration noise when the vehicle is running is higher. In view of these harsh working environments and the requirements for structural components, engineering plastics used for peripheral components of automobile engines must have the following characteristics.
1. It has sufficient strength, elastic modulus and impact strength, especially low temperature impact strength.
2. It has good shock absorption, abrasion resistance and noise resistance.
3. It should have oil resistance (such as gasoline, diesel, lubricating oil, etc.), detergent, long-lasting antifreeze, brake fluid, battery acid, various additives in oil, alcohols, etc.
For cooling system components, they should also have good resistance to hydrolysis and thermal deformation.
5. It is necessary to have good melt fluidity and molding processability, because most of these parts are molded by injection molding, and some parts have very complicated structures, especially the intake manifold manufactured by the molten core method is manufactured by low-speed pressure Injection molding. Therefore, the resin must have better melt fluidity, otherwise it is difficult to form.
6. The surface performance is good, especially the surface of the intake manifold should be smooth.
7. It has sufficient accuracy, dimensional stability and long-term use function; the economic condition is good.
8, plastic waste and waste parts can be recycled.
Since the parts around the engine are mainly heating and vibrating parts, most of the materials used in the parts are glass fiber reinforced nylon. This is because nylon has better overall performance. The main properties of glass fiber modified nylon have been greatly improved, such as strength, product accuracy, and dimensional stability. (In addition, nylon engineering plastics are ideal materials for parts around the engine)
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