Shijiazhuang Hongtao Technology Co., Ltd., a professional high-tech enterprise based in Zhengding County, Shijiazhuang, Hebei, China, specializes in R&D, manufacturing and customization of high-temperature polycrystalline mullite fiber needled blankets, core high-temperature insulation materials for industrial and laboratory applications.

Made of high-purity Al₂O₃ (72%-73%) and SiO₂ raw materials via sol-gel technology and double-sided needling process, these needled blankets feature excellent high-temperature resistance, with a maximum working temperature of 1600℃ and long-term service temperature up to 1500℃[1][3]. They have a bulk density of 96-150 kg/m³ and low linear shrinkage (≤0.7% at 1500℃ for 24 hours)[1][3].

Boasting low thermal conductivity (＜0.1 W/m·K at 600℃, ＜0.3 W/m·K at 1000℃), they achieve remarkable energy-saving effects and reduce heat loss significantly[3][10]. With superior thermal shock resistance and chemical inertness, they resist acid and alkali corrosion, and their non-organic, shot-free design ensures a clean working environment[1][3].

Lightweight and flexible, they are easy to install and process, widely applied in industrial kilns, petrochemical equipment, new energy and aerospace fields as insulation linings and seals[2][7][9]. Shijiazhuang Hongtao provides customized size solutions, adhering to innovation to deliver high-quality needled blankets for global partners.