Toray Corporation was founded in 1926 and is a century old Japanese enterprise dedicated to the research, development, and production of chemical fibers and high-performance materials. Dongli Corporation is a renowned brand globally, with its products widely used in fields such as automotive, aerospace, electronics, and healthcare. The carbon fiber materials produced have the world's largest market share. It is also the world's first manufacturer of PPS polyphenylene sulfide fibers. Dongli's PPS film can not only be used as a single-layer material, but also as a composite material for manufacturing composite insulation paper, such as NSN.