How do Nylon Machine Parts perform in high temperature environments

Nylon Machine Part is a widely used engineering plastic often used to manufacture machine parts due to its good mechanical properties, wear resistance and self-lubricating properties. However, the performance of nylon is significantly affected in high-temperature environments, and understanding these changes is critical to ensuring its reliability in a specific application.

First, nylon has limited heat resistance. Different types of nylon have different glass transition temperatures (Tg) and melting points. For example, nylon 6 has a Tg of about 47 degrees Celsius and a melting point of about 215 to 225 degrees Celsius, while nylon 66 has a Tg of about 70 degrees Celsius and a melting point of about 255 to 265 degrees Celsius. When the temperature approaches or exceeds these values, the nylon parts will soften and the mechanical strength and hardness will decrease, which may lead to dimensional instability and thus affect the normal operation of the machine.

Secondly, nylon is hygroscopic. This characteristic makes it easy to absorb moisture in high temperature and high humidity environments. The presence of moisture can reduce the heat deflection temperature of nylon, and during heating, evaporation of moisture can cause internal stresses that can cause cracking of components or surface blistering. In addition, water absorption can affect the electrical insulating properties of nylon, an important consideration for electrical applications.

Furthermore, long-term use of nylon at high temperatures can cause aging. When exposed to high temperatures for a long time, nylon molecular chains may undergo chain scission or cross-linking reactions, which will change the physical and mechanical properties of the material. The aging process makes nylon brittle, reduces its toughness, and reduces its impact resistance, thereby shortening the service life of the component.

In summary, the performance of Nylon Machine Parts in high-temperature environments is affected by many factors. Selecting the type of nylon suitable for high-temperature applications, considering the specific conditions of the working environment, and taking appropriate modification measures are all keys to ensuring reliable operation of nylon parts under high-temperature conditions.