Kwaaji ebu belt na ndị akacha eji sịntetik ihe dị ka polyester na naịlọn ke ikpehe iba. N'etiti ha, polyester na naịlọn na-ekewa n'ime dị iche iche.

Polyester: Product aha polyester, polyethylene terephthalate na nkà mmụta sayensị aha bụ ugbua diester, abbreviated dị ka PITA. Polyester nwere uru nke ezi okpomọkụ na-eguzogide, obere deformation, adịghị mfe etinye obi ha dum mmiri mmiri, elu ike. Agaghi asu ihe polyester yarn ya dị mbụ arụmọrụ, kewara elu ike (ie, nkịtị ụdị), elu modulus ala shrinkage, ala shrinkage ụdị, ala shrinkage ụdị.

Naịlọn: ahia aha naịlọn, naịlọn 6 na naịlọn 66, naịlọn kewara abụọ na ụdị. Naịlọn 6 bụ polycaprolactam na nkà mmụta sayensị aha, abbreviated dị ka PA6, PA66 na nkà mmụta sayensị aha ya bụ polycaprolactam adipamide, abbreviated PA66. General uru nke naịlọn bụ a elu ike, ike ọgwụgwụ na-eguzogide nke obere, ala njupụta. Ma drawback bụ elu mmiri enwetaghachi, susceptible ka gburugburu ebe obibi mmetụta.