The advantages of polyester parts include good transparency, heat resistance, impact resistance, and good processing performance, while the disadvantages include insufficient hydrolysis stability, sensitivity to notches, resistance to organic chemicals, poor scratch resistance, and yellowing after long-term exposure to ultraviolet rays.
Polyester, also known as polyethylene terephthalate (PET), is an engineering plastic widely used in various fields. Its advantages are mainly reflected in the following aspects:
Good transparency: Polyester has excellent transparency and can be easily colored to meet the appearance requirements of different products.
Heat resistance: Polyester exhibits good mechanical properties within the normal use temperature range and has high heat resistance and impact resistance.
Good processing performance: Polyester has a high refractive index and good processing performance, and is suitable for various molding processing methods, such as injection molding, extrusion, etc.
However, polyester parts also have some disadvantages, which require special attention during use:
Insufficient hydrolysis stability: Polyester has poor stability in a hydrolysis environment, and long-term contact with water or a humid environment may lead to performance degradation.
Sensitive to notches: Polyester is very sensitive to notches, and tiny notches in the product may significantly reduce its mechanical strength.
Poor resistance to organic chemicals and scratches: Polyester may show poor scratch resistance and aging resistance after contact with certain organic chemicals or long-term use.
Yellowing after long-term exposure to ultraviolet rays: Polyester may turn yellow after long-term exposure to ultraviolet rays, affecting its appearance and performance.
In summary, although polyester parts have many advantages and are widely used in various fields, their shortcomings also need to be given enough attention during use1.