Nylon ma ọ bụ Polyamide bụ ezinụlọ buru ibu, Polyamide 6.6 na 6 bụ nke a na-ejikarị na yarn ụlọ ọrụ.N'ikwu okwu kemịkalụ, Polyamide 6 bụ otu monomer nwere carbon carbon 6.Emere Polyamide 6.6 site na monomers 2 nwere carbon carbon 6 nke ọ bụla, nke na-ebute aha 6.6.