Dab tsi yog qhov zoo sib xws thiab qhov sib txawv ntawm PFA thiab PTFE?

Qhov tseem ceeb sib txawv ntawm PFA raj thiab PTFE raj yog nyob rau hauv cov ntaub ntawv uas lawv siv. Nws kuj yog qhov yooj yim heev kom paub qhov txawv ntawm ob cov ntaub ntawv yas no. Los ntawm nws cov tsos, PFA yog translucent thiab PTFE yog dawb huv thiab opaque; Nyob rau hauv cov duab ntawm raw cov ntaub ntawv, PFA yog granular thiab PTFE yog hmoov.

PFA yas yog ib tug copolymer ntawm ib tug me me ntawm perfluoropropyl perfluoroethylene ether thiab polytetrafluoroethylene. Nws yog tus cwj pwm los ntawm kev txhim kho yaj adhesion, txo cov kua viscosity, thiab tsis muaj kev hloov pauv hauv cov khoom piv nrog polytetrafluoroethylene. Cov resin tuaj yeem ua tiav ncaj qha rau hauv cov khoom los ntawm cov txheej txheem thermoplastic molding zoo tib yam, thiab tsim nyog rau kev ua kom corrosion - resistant qhov chaw, hnav - resistant qhov chaw, seals, insulating qhov chaw, cov khoom siv kho mob, siab - kub hlau thiab cable insulating txheej, anti - corrosion cov khoom siv, cov ntaub ntawv sealing, twj tso kua mis valve bushings, thiab cov ntim tshuaj.

Lub sijhawm ntev - qhov kev pabcuam kub ntawm PFA yog - 196 - 260 degree, nrog rau cov tshuaj tiv thaiv zoo heev, corrosion tsis kam rau tag nrho cov tshuaj, thiab kev sib txhuam coefficient yog qis tshaj hauv cov yas; Tib lub sijhawm, nws kuj muaj cov khoom siv hluav taws xob zoo. Nws cov hluav taws xob rwb thaiv tsev tsis cuam tshuam los ntawm qhov kub thiab txias. Nws cov tshuaj tiv thaiv zoo ib yam li polytetrafluoroethylene thiab zoo dua li ntawm vinylidene fluoride.

PFA muaj kev nkag siab zoo dua thiab lub zog compressive tshaj PTFE, siab tensile zog thiab elongation ntawm 100 - 300%. Nws muaj cov cuab yeej zoo dielectric thiab cov hluav taws xob zoo heev; Cov nplaim hluav taws kub hnyiab mus txog qib V0, thiab PFA yeeb nkab ua los ntawm nws kuj muaj qhov ua tau zoo tshaj plaws.

PTFE yog polytetrafluoroethylene. Cov khoom no muaj cov yam ntxwv ntawm acid tsis kam, alkali tsis kam thiab tsis kam mus rau ntau yam organic solvents. Nws yuav luag insoluble nyob rau hauv tag nrho cov kuab tshuaj. Nyob rau tib lub sijhawm, polytetrafluoroethylene muaj cov yam ntxwv ntawm qhov kub thiab txias thiab nws cov kev sib txhuam coefficient tsawg heev, yog li nws tsis tuaj yeem siv rau lubrication xwb, tab sis kuj dhau los ua cov txheej txheem zoo tshaj plaws rau kev ntxuav yooj yim ntawm cov kav dej sab hauv.

Kev xyaum tau ua pov thawj tias PTFE tuaj yeem tiv taus huab cua laus; Radiation kuj thiab tsis tshua muaj permeability; Tom qab ntev - lub sij hawm raug rau cov huab cua, qhov chaw thiab cov khoom tseem tsis hloov. Nyob rau tib lub sijhawm, nws tuaj yeem tiv taus cov kua qaub thiab alkali, yog li nws yog insoluble hauv cov kua qaub, muaj zog alkali thiab cov kuab tshuaj organic.