Polyamide PA 66, uas kuj muaj lub npe hu ua nylon 66, yog ib qhov siv zoo heev thiab tshuaj kom sov tshuaj thermoplastic uas muaj zog meej, nyob deb ntawm qhov kub, thiab muaj kev nyob ruaj khov rau kem. Nws tau tsim los ntawm kev sib poob ntawm hexamethylenediamine thiab adipic acid, txawj tshuaj tshiab ib qho polymer uas muaj qhov sov npog li 260°C thiab qhov kub tshem tsha li 50°C. Qhov tseem ceeb yog qhov zog tshem tsha ntawm 80–90 MPa, muaj zog siab, thiab zoo nkauj rau kev tiv thaiv kev rub, ua rau nws tuaj yuav siv rau kev siv nyob hauv qhua tsev, hluav taws xob, thiab hauv kev lag luam. Vaj huam sib luas muaj qhov kub tshem tsha li 90°C nyob rau 1.82 MPa, thiab tuaj yeem tiv thaiv qhov kub txog 120°C, tab sis nws muaj kev nyob ruaj khov rau dej thiab tuaj yeem dhau txog 2.5% dej nyob rau hauv qhov chaw muaj dej, uas tuaj yeem tsim cov tshuaj plastic thiab muaj kev pheej rau qhov ntev thiab qhov zog. Cov kev tsim kho tshuaj xwm txheej xwm txheej, xwm txheej, thiab xwm txheej yuav tsum muaj qhov kub ntawm 270–290°C thiab muaj kev saib xyuas kom tsis txhob muaj kev puag. PA 66 feem ntau tau hloov kho los ntawm cov khoom siv zoo li fiberglass, tshuaj tiv thaiv dej, lossis tshuaj hloov kho kev puag, kom txhim kho cov yam ntxwv; piv txwv li, cov khoom siv fiberglass muaj kev txhim kho kev zog thiab kev nyob deb ntawm qhov kub. Cov kev siv tau muaj neeg sau tej rooj, bearings, thiab cov khoom siv hluav taws xob, uas muaj kev nyob ruaj khov rau kev tiv thaiv, kev tiv thaiv hluav taws xob, thiab kev nyob ruaj khov rau huab cua thiab solvents. Cov kev xyaum tshwj xeej thiab kev nyab xeeb txog dej num muaj kev siv dua thiab kev txhim kho cov khoom tshuaj tshiab tshiab, raug sib cuam rau kev nyab xeeb txog dej num hauv cheeb tsam. Nyuaj siab, polyamide PA 66 yog ib qhov khoom siv zoo thiab nyob ruaj ruaj, muaj kev sib thooj sib tw ntawm kev tsim kho thiab kev siv, uas tuaj yeem txhim kho cov yam ntxwv rau kev siv hauv cheeb tsam thiab raug sib cuam rau cov lus qhia thiab kev cai hauv cheeb tsam.