The scientific name of nylon fiber is polyamide fiber, which was originally the trade name of the polyhexamethylene adipate produced by DuPont, that is, nylon hexamethylene chloride. Polyamide fiber is the first commercial synthetic fiber product of synthetic polymer. It is the first page of synthetic fiber, which is still the representative of polyamide fiber, because it was researched and invented by Caarothers of DuPont in 1937.