Vulcanized fiber has good mechanical processing performance and insulation performance, oil resistance, and can process parts under a wide temperature range of -40 ℃ to 100 ℃. Because of its superior performance, it is widely used in industries such as machinery, textiles, electrical appliances, railways, and aerospace. Our company produces insulation vulcanized fiber made of refined chemical pulp mixed with cotton and wood, which is treated with a special process of zinc chloride. The vulcanized fiber has good density, tensile strength, and flatness, with a smooth and delicate surface that does not fade. It has low water absorption and is not easy to regain moisture. It has high weather resistance, heat resistance, and light resistance.