Polyamide Resin Flame Retardant, Easy To Process

Polyamide resin is a polycondensation type polymer compound with a CONH structure in the molecule, which is usually obtained by polycondensation of dibasic acid and dibasic amine. The most prominent advantage of polyamide resin is that the range of softening point is very narrow, unlike other thermoplastic resins, there is a gradual curing or softening process, which causes rapid curing when the temperature is slightly lower than the melting point. Polyamide resin has good chemical resistance, can resist acid and alkali, vegetable oil, mineral oil, etc. Because it has polar groups such as amino groups, carbonyl groups, and amide groups in its molecules, it has good adhesive properties for wood, pottery, paper, cloth, brass, aluminum and phenolic resins, polyester resins, polyethylene and other plastics.

In the 1950s, injection molding products were developed and produced to replace metal to meet the requirements of lightweight and cost reduction of downstream industrial products. There are many repeating amide groups on the main chain of polyamide, which is called nylon when used as plastic, and nylon when used as synthetic fiber. Lactam to synthesize. According to the difference in the number of carbon atoms contained in diamines, diacids or amino acids, a variety of different polyamides can be prepared, and there are dozens of polyamide varieties, among which polyamide-6, polyamide-66 and polyamide Amide-610 is the most widely used.

PA has good comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubrication, and has a low coefficient of friction, a certain flame retardancy, and is easy to process. It is suitable for use with glass fiber and Other fillers are filled and enhanced to improve performance and expand the scope of application. There are many kinds of PA, including PA6, PA66, PAll, PAl2, PA46, PA610, PA612, PAl010, etc., as well as many new varieties such as semi-aromatic nylon PA6T and special nylon developed in recent years. Nylon-6 plastic products can use sodium metal, sodium hydroxide, etc. as the main catalyst, and N-acetyl caprolactam as a co-catalyst, so that δ-caprolactam can be directly prepared by anion ring-opening polymerization in the model, which is called cast nylon. This method facilitates the manufacture of large plastic parts.