PFA yog dab tsi?
Lub npe Askiv ntawmPFAyog: Polyfluoroalkoxy, Suav lub npe yog: tetrafluoroethylene - perfluorinated alkoxy vinyl ether copolymer (tseem hu ua: perfluorinated alkylates, soluble polytetrafluoroethylene)PFAResin yog cov tshiab yaj-processable fluoroplastics, PFA, FEP, PTFE chemical zog zoo ib yam, tab sis FEP tsuas yog siv tau qis dua 200 degrees, PTFE tsis tuaj yeem txhaj.
1, Kev nqus tshwj xeeb: 2.13-2.167g / cm3
2, Moulding shrinkage: 3.1-7.7%
3, molding kub: 350-400 ℃
4, Lub melting point ntawm PFA yog hais txog 580F thiab qhov ceev yog 2.13- 2.16g / cc (g / cm3).
Cov yam ntxwv thiab kev siv tseem ceeb ntawm PFA
PFA feem ntau hu ua fusible PTFE, thiab nws cov khoom sib txawv yog cov fluoroplastics sab saum toj, thiab nws cov kev siv zoo ib yam li FEP.Nws yog dav siv hauv kev lag luam semiconductor, nrog rau kev kho mob, tshuaj thiab tshuaj tiv thaiv corrosion, tsheb thiab lwm yam.
PFA muaj nyob rau hauv daim ntawv pellet rau molding thiab extrusion, hmoov daim ntawv rau rotational molding thiab txheej, thiab nyob rau hauv semi-tiav khoom xws li films, nplooj ntawv, rods thiab tubing.PFA resins muab faib hauv Asmeskas kev lag luam yog Teflon hom los ntawm DUPOut, Neoflon hom los ntawm Daikin, Hthen hom los ntawm Ansimont, thiab Hostafl hom los ntawm HOechst Celanese.
1 、 Lub ntsiab siv ntawmPFA.
①.Haum rau kev tsim cov khoom siv corrosion-resistant, hnav-resistant qhov chaw, seals, rwb thaiv tsev qhov chaw thiab cov khoom siv kho mob.
②.Kev kub ceev hlau thiab cable rwb thaiv tsev, cov khoom siv tiv thaiv corrosion, cov ntaub ntawv sib khi, lub twj tso kua mis thiab lub valve bushings, thiab cov ntim tshuaj.
2 、 Kev ua haujlwm zoo
①.Cov khoom siv crystalline, me me noo noo nqus.Yuav ua tiav rau hauv cov khoom los ntawm cov txheej txheem thermoplastic li niaj zaus.
②.Kev txav tsis zoo, yooj yim heev rau decompose, decomposition ua corrosive gas.Lub molding kub yuav tsum tsis txhob siab tshaj 475 degrees, lub pwm yuav tsum tau rhuab mus rau 150-200 degrees, thiab lub pouring system yuav tsum muaj tsawg tsis kam mus rau cov khoom ntws.
③.Translucent granules, txhaj tshuaj thiab extrusion molding.Moulding kub 350-400 degrees, saum toj no 475 degrees yog ib qho yooj yim ua rau discoloration los yog npuas.Thiab nco ntsoov tias nws yuav nyuaj rau demold.
④.Vim tias cov khoom siv molten muaj cov nyhuv corrosive ntawm cov hlau, kev tsim khoom mus sij hawm ntev, cov pwm xav tau kev kho chromium plating.
Khoom siv tau zoo
1, PFA yog ib copolymer me me ntawm perfluoropropyl perfluorovinyl ether thiab polytetrafluoroethylene.Melt bonding yog txhim kho, viscosity ntawm cov tshuaj yog txo, thaum qhov kev ua tau zoo tsis hloov pauv piv nrog PTFE.Cov resin no tuaj yeem ua tiav ncaj qha rau hauv cov khoom los ntawm cov txheej txheem thermoplastic molding.
2, kev siv lub sij hawm ntev kub - 80 - 260 degrees, muaj cov tshuaj tiv thaiv zoo heev, corrosion tsis kam rau tag nrho cov tshuaj, qhov qis tshaj coefficient ntawm kev sib txhuam ntawm cov yas, muaj cov khoom siv hluav taws xob zoo heev, nws cov hluav taws xob rwb thaiv tsev tsis cuam tshuam los ntawm qhov kub thiab txias, lub "plas huab tais" hu ua.
3, nws cov tshuaj tiv thaiv thiab PTFE zoo ib yam, zoo dua vinylidene fluoride.
4, nws cov creep kuj thiab compression zog yog zoo dua li PTFE, siab tensile zog, elongation mus txog 100-300%.Zoo dielectric zog, zoo heev hluav taws xob kuj.
5, Tsis muaj tshuaj lom: physiologically inert, tuaj yeem cog rau hauv tib neeg lub cev.
Lub sij hawm xa tuaj: Nov-18-2022