On October 21, 2021, the "Sound insulation and heat insulation ultra-fine glass fiber cotton for commercial aircraft" developed by China's leading thermal insulation material technology company: CQWL Advanced Materials Technology Corporation was successfully applied to C919 aircraft
CQWL developed aviation sound insulation and heat insulation ultra-fine glass fiber cotton suitable for Chinese commercial aircraft in two years. Innovative research has been carried out on the fiber composition design, fiber network system structure and modification treatment, and the sound insulation performance of aviation cotton , A major breakthrough in thermal insulation and mechanical properties has been achieved, Thermal conductivity is only 1.5 milliwatts.
12 patent protections have been successfully applied for. The sound insulation and heat insulation performance indicators of aviation cotton meet the requirements of COMAC's large aircraft flight test, breaking the technical blockade and product monopoly of the United States. It has been applied in batches of ARJ21 regional aircrafts.