The performance changes of electrical nonwoven fabrics under high-temperature environments are mainly reflected in their mechanical properties, insulation properties, and dimensional stability. As temperature increases, the molecular chain mobility of polyester fibers increases, potentially leading to material softening or deformation. At high temperatures, the tensile strength and tear strength of nonwoven fabrics typically decrease, especially near the glass transition temperature of polyester, where this change is more pronounced. Therefore, in high-temperature applications, it is necessary to select polyester varieties with better heat resistance or add heat-resistant additives.

Customizing the color of nonwoven fabrics can be achieved through several methods, mainly including fiber dyeing, masterbatch addition, coating coloring, and printing processes. Fiber dyeing involves dissolving polyester or other raw materials before spinning and adding dye, using solution dyeing to give the fiber its own color. This method produces uniform and long-lasting colors with high color fastness, suitable for mass production. However, dyed fibers have lower flexibility; changing colors requires re-preparing the spinning solution, making it suitable for production needs with fixed color codes.