I-PTFE (i-polytetrafluoroethylene), eyaziwa ngokuba yi-polymer, yeyona polima ekhethiweyo yokuqala yeemvumba kunye ne-diaphragms, kodwa ubusazi ukuba i-PTFE ayisiyiyo yodwa ipholima onokukhetha kuyo?Kweli nqaku siza kuthelekisa ezinye iipolymers ezimbini-PFA kunye neTFM-kwi-PTFE njengokhetho lwezinto eziphathekayo kunye ne-diaphragms.
PFA
I-PFA, okanye iPerfluoroalkoxy, ngamanye amaxesha ibizwa ngokuba yi-polymer PFA.Ineempawu ezifana ne-PTFE, kubandakanywa ukuxhathisa kweekhemikhali okugqwesileyo kwaye inegesi ephantsi kakhulu.Ayiyo-hydrophobic njenge-PTFE, nangona kunjalo, kwaye ifunxa amanzi amaninzi.Esinye isizathu sokuba ikhethwe ngaphezu kwe-PTFE kukukwazi ukugcina amandla ayo omatshini kumaqondo obushushu aphezulu, nokuba idityaniswe neekhemikhali ze-caustic.Ikwanazo zombini i-creep egqwesileyo, iipropathi zokudinwa kunye nokuzinza kwe-thermal.Ubuninzi benkonzo yayo eqhubekayo kwiqondo lobushushu ngama-260°C.
I-PFA ikwaguquguquka ngakumbi xa kufikwa kwindlela iinxalenye ezinokwenziwa ngayo;umzekelo, iboleka kakuhle kwi-extrusion, ukubumba inaliti, ukubunjwa kokudlulisa, ukubumba, kunye noxinzelelo lokubumba.Uya kuhlala ubona i-PFA isetyenziselwa izixhobo zelebhu yeplastiki ngenxa yokungangeni kweekhemikhali okubalaseleyo, kwaye ukuguquguquka kwayo kuyenze ukuba ibe lukhetho oludumileyo lwetyhubhu kwizicelo ezininzi zeekhemikhali.Ikwadumile kwi-semiconductor kunye nezicelo zamayeza.
TFM
Usenokuba ukhe weva nge-TFM, okanye i-PTFE-TFM.I-TFM sisizukulwana sesibini se-PTFE esiquka isilungisi esongezelelweyo esibizwa ngokuba yiPerfluoro(propyl vinyl ether).Esi silungisi senza ulwakhiwo lwepolymer luxinene kune-PTFE, luthoba irhasi yokungena ngaphantsi kwe-PTFE kodwa lungabi phantsi kakhulu njenge-PFA.Ubukhulu bodonga olufanayo lwe-TFM buphinda kabini isiphumo sothintelo njenge-PTFE.Ukufunxa kwawo amanzi kuthelekiseka naleyo ye-PTFE, elunge kakhulu.NjengePFA, iqhuba kakuhle kumaqondo obushushu aphezulu kwaye inert kakhulu yeekhemikhali.I-TFM ikwalungelelaniswe kakuhle kwizicelo ezidibanisa amaqondo obushushu aphezulu kunye ne-vacuums.NjengePFA, isebenza kakuhle kwizicelo zamayeza kunye ne-semiconductor.
Xa ithelekiswa ne-PTFE, ineempawu zomphezulu ezingcono nangakumbi, iqinile, kwaye ayichaphazeleki lula kukurhubuluza kwaye iphucule iimpawu zokudinwa.Xa kuthelekiswa ne-PTFE, ikwabonisa ukuchacha koxinzelelo olungcono.Iqondo eliphezulu lobushushu benkonzo yalo yi-250°C, engaphantsi kancinane kwePFA.
Iinketho zePolymer
Zombini ezi zikhetho zepolymer lukhetho oluhle kakhulu lwezicelo zokucoceka okuphezulu, kubandakanya nezonyango, i-pharma, i-semiconductor bellows.Ke, kwixesha elizayo xa ukhetha i-polymer bellows okanye i-diaphragm, ungalibali ukuba i-PTFE ayisiyiyo kuphela inketho yakho yemathiriyeli.
Ixesha lokuposa: Apr-11-2018