People have some misconceptions in the use and maintenance of cars. Sometimes these misconceptions seem correct, but they are not. They are very harmful. They can cause damage to vehicles and threaten their personal safety. The greater possibility is that Buried hidden dangers of accidents, or caused the performance of vehicles, accelerated wear, shortened life expectancy.
1. Blindly remove the engine thermostat If you blindly remove the thermostat due to the high engine temperature, the coolant can only perform a large cycle, can not adjust the cooling intensity, it is difficult to ensure that the engine works at a more appropriate temperature, but the engine is often in the Working at low temperatures results in a drop in engine power, accelerated wear, and increased fuel consumption. If the engine temperature is still high after troubleshooting or replacing the engine thermostat, other parts of the cooling system should be inspected and the thermostat can not be removed.
2. The fear of high engine temperature is not afraid of low. Some people think that the engine temperature is not afraid of high when driving. In fact, when the engine temperature is low, the danger is also great. Cars should be driven according to the normal temperature specified in the vehicle's operating instructions to ensure the service life of the engine.
3. The tighter the water pump fan belt, the tighter the belt is not better. Too tight a belt not only makes it stretch or break, shortens the service life of the belt, but also results in excessive deformation of the generator shaft, the water pump shaft, and early damage to the bearing. The tightness of the car engine fan belt should meet the technical requirements. Normally, the normal belt is equipped with a deflection of 10-15mm.
4. When the engine is idling at an idle speed, the oil pump cannot quickly press the lubricant into each lubrication surface due to the low rotation speed, and the oil pressure is also low, so that the engine parts are in dry friction or semi-dry friction state. Under work; fuel due to poor low-temperature atomization, so that unburned fuel (mixed gas) into the crankcase, flush off the oil film on the cylinder wall, it will also accelerate the wear of the parts. Therefore, after the engine is started for a few seconds, the application of fast idle temperature (in the modern car with fast idle speed device, after the engine temperature rises, it will automatically adjust to the idle state) to improve the engine lubrication conditions.
The application of silica in PET (polyethylene terephthalate) film mainly involves the following aspects:
1. Enhanced performance: Silica can be added to PET film as a filler to improve its mechanical strength, thermal stability, optical transparency and other properties. The physical and chemical properties of PET film can be optimized by adjusting the size and dispersion of silica particles.
2. Surface modification: By depositing silica on the surface of PET film, its surface properties, such as hydrophilicity or hydrophobicity, can be changed, which is crucial for certain applications (such as packaging materials, filter membranes, etc.).
3. Antioxidant effect: Silica can be added to PET film as an antioxidant to help reduce the oxidative degradation of the film during use and extend its service life.
4. Light scattering: In some applications that require specific optical effects, silica particles can be used to scatter light to achieve special visual effects or functions.
5. Biocompatibility and antibacterial properties: In the medical and biotechnology fields, the addition of silica with specific functions (such as silica nanoparticles loaded with antibacterial agents) can give PET films biocompatibility and antibacterial properties, which are suitable for the manufacture of medical devices and biodegradable packaging materials.
6. Anti-fog treatment: Silica can be used as an anti-fog agent component for surface treatment of PET films to prevent water vapor from condensing into fog and improve transparency and visibility.
When using silica to enhance the performance of PET films, it should be noted that factors such as the amount of silica added, particle size, and dispersibility will have an important impact on the performance of the final product. Therefore, in practical applications, careful formulation design and process optimization are usually required.
PET Film Material Silicon Dioxide Powder, CAS 7631-86-9 Coating Material,7631-86-9 Silica Based PET Film
Guangzhou Quanxu Technology Co Ltd , https://www.skysilmattingagent.com