I-Polyamide (ekwabizwa ngokuba yi-PA okanye iNylon) ngamagama aqhelekileyo e-resin ye-thermoplastic resin, equlathe iqela eliphindaphindwayo le-amide kwikhonkco eliphambili leemolekyuli. I-PA ibandakanya i-aliphatic PA, i-aliphatic - i-PA enamakha kunye ne-PA enamakha, apho i-aliphatic PA, ethathwe kwinani lee-athomu zekhabhon kwi-monomer eyenziweyo, ineentlobo ezininzi, inamandla kakhulu kunye nokusetyenziswa okubanzi.
Ngokwenza kwemoto iimoto, ukusebenza okuphezulu kwezixhobo zombane kunye nezombane, kunye nokukhawulezisa kwenkqubo elula yobunzima boomatshini, imfuno yenayiloni iya kuba phezulu nangaphezulu. Iziphene ze-nylon nazo zibalulekile ekuthinteleni ukusetyenziswa kwayo, ngakumbi i-PA6 kunye ne-PA66, xa kuthelekiswa neentlobo ze-PA46, PA12, zinexabiso elihle, nangona intsebenzo ingafikeleli kwiimfuno zophuhliso lwamashishini ahambelana noko.