If you're looking for a high-quality felt belt that can withstand temperatures up to 300℉/150℃, then our Polyester Felt Belt is perfect for you! Polyester is a synthetic polymer made of purified terephthalic acid (PTA), dimethyl ester dimethyl terephthalate DMT), and ethylene glycol, making it highly durable and resistant to wear and tear. Because it does not have high heat resistance, it is usually used at the end of the process when the profile is cooler. Polyester is a common material used in clothing fiber but is also widely used in aluminum extrusion.