The use of nylon materials is very common, as small as nylon stockings, as large as the peripheral parts of the car engine, etc., have spread all aspects of our lives. PA modified material is the largest and most important variety in engineering plastics, with strong vitality, mainly because it achieves high performance after modification, followed by the automotive, electrical, telecommunications, electronics, machinery and other industries themselves. Depending on the scope of use, the requirements for nylon data functions are also different, such as high temperature resistance, abrasion resistance and impact resistance, chemical resistance, transparency, and resilience.

Nylon as a general rule, individually refers to two common varieties of PA6 and PA66. Conventional nylon will still have major problems after strengthening and flame retardant modification, such as strong hydrophilicity, low temperature resistance, poor transparency, etc., which limits more utilization. Therefore, in order to improve the defects and add new characteristics, we may obtain a series of special nylons with different characteristics and satisfying different applications by introducing new synthetic monomers. They are mainly divided into high temperature nylon and long carbon chain nylon. , Transparent nylon, bio-based nylon and nylon elastomer, etc. So, let's distinguish and talk about the types of special nylon, their respective characteristics and utilization.

Classification and utilization examples of special nylon

High temperature resistance——High temperature nylon First of all, high temperature nylon, which refers to nylon that may be used in an environment above 150℃ for a long time Information. The high temperature resistance of high temperature nylon is individually obtained by introducing rigid aromatic monomers. For example, fully aromatic nylon, the most typical is DuPont’s Kevlar, which is prepared by the reaction of terephthaloyl chloride with p-phenylenediamine or p-aminobenzoic acid, referred to as PPTA, which may persist even after 200H at a high temperature of 280℃ Good strength. However, fully aromatic high-temperature nylon is not easy to process, and it is difficult to realize injection molding. Therefore, semi-aromatic high-temperature nylon combined with aliphatic and aromatic is more popular. At present, most of the high-temperature nylon varieties, such as PA4T, PA6T, PA9T, PA10T, etc., are basically semi-aromatic high-temperature nylons polymerized by linear aliphatic diamine and terephthalic acid.

PA6 semi-transparent or opaque milky white particles have the characteristics of thermoplasticity, light weight, good toughness, chemical resistance and good durability. They are generally used in auto parts, mechanical parts, electronic and electrical products, engineering accessories and other products. PA66 is formed by polycondensation of adipic acid and hexamethylene diamine. It is widely used in the automotive industry, instrument housings and other products that require impact resistance and high strength requirements. High-temperature nylon is commonly used in automobile complete machines, mechanical machines, and electrical/electronic machines.