Polyamide long fiber can be used alone or interwoven with other fibers. It can also be twisted into processing silk for knitting or plain weaving. It can be used in underwear for boys and girls' clothing, quilt cover fabrics, socks, raincoats, etc. In addition, polyamide fiber can be used in the outer and inner layers of astronauts' outerwear to protect astronauts from meteorites in outer space with its high strength. In home decoration, it can be used in curtain cloth, shower curtain cloth, umbrella cloth, etc, In industrial use, it can be used for fishing nets, filter cloth, cable, tire cord, liner cloth of wheel conveyor belt and parachute cloth, etc.