Polyamide (PA) an fi sani da nailan, kuma dogon nailan sarkar carbon yana nufin nau'in nailan tare da ƙungiyoyin methylene guda 10 ko fiye tsakanin amintattun haɗin gwiwa a cikin babban sarkar macromolecule, kamar PA11, PA12, PA1010, PA1212, PA1012, da sauransu. .

Daga cikin su, PA610 da PA612 biyu aliphatic polyamides, zabi na dogon-sarkar diamines da hexamethylene diamine condensation, tsananin magana, ba su hadu da sama definition, saboda da tsawon na diacid fiye da 10 carbon, ta lokaci-lokaci tsawon a cikin tazara. na rabin shine saduwa da ma'anar dogon sarkar carbon nailan, yayin da tsayin diamin kawai 6 carbon, wanda ya haifar da juriya na kayan abu da kaddarorin inji da sauran kaddarorin mafi kyau fiye da dogon sarkar carbon nailan, ɗan ƙasa kaɗan fiye da Babban manufar nailan PA6. da PA66, don haka PA610 da PA612 galibi ana rarraba su azaman dogon sarƙar nailan.

PA6 da PA66 suna da ƙimar shayar da ruwa mai yawa, wanda ke haifar da babban bambancin girman samfur da kaddarorin da yanayin yanayin aiki mai girma.Dogayen sarkar carbon nailan na iya daidaita ƙarancin gajerun sarƙoƙi na carbon saboda tsayin sarkar methylene tsakanin ƙungiyoyin amide masu kusa.Bugu da ƙari ga ainihin kaddarorin polyamides, suna kuma nuna ƙarancin ƙarancin dangi, ƙarancin sha ruwa, kwanciyar hankali mai kyau, ingantaccen juriya na sinadarai, kyawawan kayan lantarki, juriya na lalata, juriya abrasion, tauri, juriya ga gajiya da ficen ƙarancin zafin jiki.