How high is the heat resistance of insulation paper?
Nov 15, 2023
When the temperature rises, the resistance, breakdown strength, mechanical strength and other properties of the insulating material will decrease. Therefore, insulating materials are required to work for a long time at specified temperatures and have reliable insulation performance. Insulating materials with different compositions have different degrees of heat resistance. The heat resistance grades can be divided into seven grades: Y, A, E, B, F, H, and C. The maximum operating temperature of each grade of insulation material is specified.
Grade Y: The ultimate working temperature is 90℃, such as wood, cotton yarn, paper fiber, acetate fiber, polyamide and other textiles and plastic insulation that is easy to thermally decompose and has a low melting point.
Grade A: The ultimate working temperature is 105℃, such as enameled wire, varnished cloth, varnished wire, oily paint and asphalt and other insulating materials.
Class E: The ultimate working temperature is 120℃, such as glass cloth, oily resin paint, high-strength enameled wire, vinyl acetate heat-resistant enameled wire and other insulating materials
Class B: The ultimate working temperature is 130°C, such as polyester thin wax, mica treated with corresponding resin, glass fiber, asbestos, polyester paint, polyester enameled wire and other insulators.
Class F: The ultimate working temperature is 155℃, such as mica, glass fiber, asbestos, glass varnish and laminates based on the above materials, mica, powder products, chemical Polyester and alkyd materials with good thermal stability, composite silicone organic polyester paint. DMD insulation paper
Class H: The ultimate working temperature is 180°C, such as thickened Class F materials, mica, silicone mica products, silicone organic paint, silicone organic rubber polyimide composite glass cloth, composite film, polyimide paint, etc.
Class C: The ultimate operating temperature is greater than 180°C. Refers to inorganic substances that do not use any organic binders and impregnating agents, such as quartz, asbestos, mica, glass, ceramics and tetrafluoroethylene plastics.
