PEEK and PI are synthesized by the British Victrex company and the United States DuPont company and have invention patents of high-performance materials, PEEK and PI in the high-performance polymers with other general plastics can not match the excellent comprehensive performance, with suitable for a variety of harsh environments of excellent performance, has been successfully used in aerospace, automotive, electronic semiconductors, electromechanical and other industries in the more demanding occasions. It is the preferred material for users to develop new products and improve product service life and reliability.