Nylon kapena Polyamide ndi banja lalikulu kwambiri, Polyamide 6.6 ndi 6 ankagwiritsidwa ntchito makamaka mu ulusi wa mafakitale. Kunena mwamankhwala, Polyamide 6 ndi monoma imodzi yokhala ndi maatomu 6 a kaboni. Polyamide 6.6 imapangidwa kuchokera ku 2 monomers yokhala ndi ma atomu a kaboni 6 iliyonse, zomwe zimapangitsa kuti 6.6 ikhale.