Polyamide(PA for short) commonly known as Nylon, is the general name of the thermoplastic resin containing repeated amide group -NHCO- on the main molecule chain. PA has good comprehensive properties, like mechanical properties, heat resistance, wear resistance, chemical resistance etc.. It’s easy to process, and is usually reinforced with glass fiber and other fillers.
²Features of nylon engineering plastic:
Nylon is one of the most important engineering plastics, and its output ranks first among the five general engineering plastics.
Nylon is a toughness angular translucent or opalescent crystalline resin, its molecular weight is generally between 15,000-30,000 g/mol. It has high mechanical strength, high softening point, heat resistance, low friction coefficient, wear resistance, self lubricating, shock absorption and noise attenuation, oil resistance, good electrical insulation.
However, PA has the disadvantage of high hydroscopicity, which affects its dimensional stability and electrical properties. This defect can be improved by reinforcing with glass fiber.
²Main types of Polyamide engineering plastic:
There are many varieties of polyamide plastics, including PA6, PA66, PA11, PA12, PA610, PA612, PA1010, and the semi-aromatic nylon PA6T and special nylon developed in recent years.
Nylon 66 has the highest hardness and rigidity among these varieties, but its toughness is less. Various nylon in order of toughness is: PA66 < PA6 < PA610 < PA11 < PA12.
²Applications:
üAutomotive interior and exterior decoration：
Reinforced modified PA filled with glass fiber or other materials has excellent comprehensive performance, so it is particularly suitable for the development of automotive lightweight requirements. Currently, polyamide is applied to a wide variety of automotive parts, such as automotive engine parts, electrical parts, airbags and other exterior parts.
üElectronic appliance parts:
PA has good mechanical properties, thermal properties and flame retardant, it can withstand the long-term working requirements of electronic and electrical devices. Thus, it’s suitable for the production of all kinds of switches, gears, household electrical parts and hand-controlled electric tool parts.
üIn addition, nylon engineering plastics can also be used for industrial parts such as: pedal, pulley, etc..
²Why is it necessary to add UV absorber to nylon engineering plastics?
Once the UV energy absorbed by the polymer chemical bond exceeds its bond energy, the atom will enter the excited state, and the excited chemical group is more likely to oxidize and occur chain scission. The free radicals formed in this process can trigger a chain reaction, resulting in accelerated polymer degradation.
Polymers have different sensitivity to UV wavelength, so it is necessary to select a certified UV absorber to protect materials from UV aging degradation.
Nylon (PA) material is very sensitive to ultraviolet light in the range of 290-315nm. Therefore, we should choose a UV absorber with strong absorption for UV-B band, and this kind of UV absorber absorption concentration in the UVB band, so as not to affect the use of fluorescent brightening agent in the formula.
OMNISTAB additives for PA plastics:
If you are interested in above additives, welcome to contact our sales staff. Sincerely looking forward to your inquiry!
