In the production of aircraft, plastic parts are required to meet strict regulations on flame retardant, low heat release, low smoke generation and low toxic gas emissions, and at the same time, products are required to have low density, high toughness, easy coloring and other characteristics; As a special polymer, PPSU, PEI and PEEK can meet the above requirements. Among them, PPSU is food-grade and can withstand repeated sterilization at a high temperature. This feature makes it possible to replace metal as a material for airline catering trolleys. Additionally, PPSU is used for aircraft interiors, it has excellent toughness and impact strength, excellent resistance to cleaning agents and chemical disinfectants, and have in-mold colors to eliminate spray paint.