The influence of environmental factors on the performance of PBT raw material

In the plastics industry, environmental factors are one of the important factors affecting the performance of PBT (polybutylene terephthalate) raw materials. Understanding these influencing factors is critical for plastics manufacturers and application professionals.
humidity:
Environmental humidity has a significant impact on the performance of PBT raw materials. PBT has a certain degree of water absorption and can easily absorb water in high-humidity environments, leading to problems such as dimensional changes in products, reduced surface quality, and reduced mechanical properties. Especially in some applications that require long-term stability, such as automotive parts or electronic equipment housings, the effect of humidity on PBT materials requires special attention.
temperature:
Temperature is another important environmental factor that directly affects the performance of PBT raw materials. In high-temperature environments, PBT materials may soften or even melt, causing the products to lose shape stability and mechanical strength. In low-temperature environments, the toughness and impact resistance of PBT may be reduced, affecting its application in cold areas.
Light and UV:
Long-term exposure to sunlight or ultraviolet radiation will cause aging and degradation of PBT raw materials. Ultraviolet rays can cause PBT surface color changes, surface roughness, decreased tensile strength and other problems, reducing its durability and aesthetics in outdoor applications. Therefore, using anti-UV additives or surface treatment in outdoor applications is an effective way to extend the service life of PBT.
Chemical exposure:
The performance of PBT raw materials is also affected by surrounding chemicals. Contact with some chemicals may cause chemical reactions in the PBT material, affecting its mechanical properties, surface quality and even causing corrosion. Therefore, when selecting PBT raw materials for application in a specific environment, it is necessary to consider its compatibility with chemical substances in the surrounding environment.
Environmental pressure and mechanical stress:
In addition to external environmental factors such as temperature, humidity and chemicals, environmental pressure and mechanical stress will also affect the performance of PBT raw materials. For example, in a high-pressure environment, PBT products may deform or deform; under the action of external forces, the strength and impact resistance of PBT may change. Therefore, when designing PBT products, it is necessary to consider the pressure and stress conditions of the environment and select appropriate materials and structural designs.