Heat resistant felt has a great impact on the quality of the finished aluminum profile as well as the production process. To a large extent, felt products play an important role in the conveyor system. All steps in the extrusion process, from the beginning to the end, are inseparable from the felt. As a result, the degree of wear and tidiness, the smoothness of conveying, the slippage or blockage of the product line, and other such problems are closely related to the quality of the felt products.