Nylon ama Polyamide waa qoys aad u weyn, Polyamide 6.6 iyo 6 ayaa inta badan loo isticmaali jiray dunta warshadaha. Kiimiko ahaan, Polyamide 6 waa hal monomer oo leh 6 atamka kaarboon. Polyamide 6.6 waxaa laga sameeyay 2 monomers oo leh 6 atamka kaarboon midkiiba, taas oo keenta in lagu qeexo 6.6.