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Due to the plasticization of electronic, motor parts, and automotive parts, higher requirements are placed on nylon performance and high temperature resistance. This opened the prelude to the research and development and application of high-temperature nylon.
High-flow glass fiber reinforced high-temperature nylon PPA is one of the new varieties that has attracted much attention, and it is also one of the fastest-growing and most cost-effective new materials. The glass fiber reinforced high temperature nylon composite material based on high temperature nylon PPA is easy to manufacture high precision, high temperature resistant and high strength products. Especially for automotive engine peripheral products, which need to cope with increasingly stringent aging requirements, high-temperature nylon has gradually become the best choice for automotive engine peripheral materials. What is unique about high temperature nylon?
1, Excellent mechanical strength
Compared with traditional aliphatic nylon (PA6/PA66), high temperature nylon has obvious advantages, which are mainly reflected in the basic mechanical properties of the product and its heat resistance. Compared with basic mechanical strength, high temperature nylon has the same glass fiber content on the premise. It is 20% higher than traditional aliphatic nylon, which can provide more lightweight solutions for automobiles.
2, Ultra-high heat aging performance
Under the premise of the thermal deformation temperature of 1.82MPa, the high temperature nylon 30% glass fiber reinforced can reach 280 °C, while the traditional aliphatic PA66 30% GF is about 255 °C. When the product requirements increase to 200 °C, it is difficult for traditional aliphatic nylons to meet the product requirements, especially the engine peripheral products have been in a high temperature and high temperature for a long time. In a wet environment, and it has to withstand the corrosion of mechanical oils.
3, Excellent dimensional stability
The water absorption rate of aliphatic nylon is relatively high, and the saturated water absorption rate can reach 5%, resulting in very low dimensional stability of the product, which is very unsuitable for some high-precision products. The proportion of amide groups in high temperature nylon is reduced, the water absorption rate is also half of that of ordinary aliphatic nylon, and the dimensional stability is better.
4, Excellent chemical resistance
Since the peripheral products of automobile engines are often in contact with chemical agents, higher requirements are placed on the chemical resistance of materials, especially the corrosiveness of gasoline, refrigerant and other chemicals has obvious corrosive effect on aliphatic polyamide, while high temperature The special chemical structure of nylon makes up for this shortcoming, so the appearance of high-temperature nylon has raised the use environment of the engine to a new level.
Automotive industry applications
Since PPA can provide a heat distortion temperature of over 270°C, it is an ideal engineering plastic for heat-resistant parts in the automotive, mechanical, and electronic/electrical industries. At the same time, PPA is also ideal for parts that must maintain structural integrity at short-term high temperatures.
At the same time, the plasticization of metal parts such as fuel systems, exhaust systems, and cooling systems near the engine has been replaced by thermosetting resins for recycling, and the requirements for materials are more stringent. The heat resistance, durability, and chemical resistance of the previous general-purpose engineering plastics can no longer meet the requirements.
In addition, the high temperature nylon series maintains the well-known advantages of plastics, namely ease of processing, trimming, ease of free design of complex functionally integrated parts, and reduced weight and noise and corrosion resistance.
Since high temperature nylon can withstand high strength, high temperature and other harsh environments, it is very suitable for engine areas (such as engine covers, switches and connectors) and transmission systems (such as bearing cages), air systems (such as exhaust air control system) and air intake devices.
Anyhow, the excellent properties of high temperature nylon can bring many benefits to users, and when converting from PA6, PA66 or PET/PBT materials to PPA, there is basically no need to modify molds, etc., so it is suitable for various applications requiring high temperature resistance. There are broad prospects.