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Impahla yeshidi le-PTFE ingasetshenziswa ngaliphi izinga lokushisa?

Ipuleti ye-Tetrafluoroethylene yaziwa njengenkosi yepulasitiki emkhakheni wepulasitiki, futhi ukusebenza kwayo akufinyelelwanga ngamapulasitiki ajwayelekile, ngakho-ke ngokuvamile isetshenziswa ezindaweni ezinezimo ezinzima, njenge-asidi ne-alkali, imidiya egqwalayo kanye nezinga lokushisa eliphezulu.Ngakho-ke, yiziphi izinzuzo zebhodi le-PTFE?

Okokuqala, inokumelana nokushisa okuphezulu.Ngokuphathelene nokusetshenziswa kwamanje kwezinto zeshidi le-tetrafluoroethylene, impahla eluhlaza ingafinyelela ku-232 ° C, futhi ngisho nokushisa okuphezulu ngemva kokubuyela ekhejini kungafinyelela cishe ku-150 ° C, futhi izinga lokushisa lokusetshenziswa libanzi kakhulu.

Ishidi le-PTFE linezici ezinhle kakhulu ze-dielectric, amandla avelele e-dielectric kanye nokumelana ne-arc, i-tangent yokulahleka kwe-dielectric ephansi, kanye nokungazweli kahle kwe-corona.Ishidi le-tetrafluoroethylene linokumunca okuhle okungewona amanzi, alinawo umoya-mpilo, i-UV kanye nokumelana nesimo sezulu.Amandla okuqina angaphandle ahlala engashintshile iminyaka emithathu ilandelana, ubude kuphela behla.Amafilimu e-Teflon kanye nama-coatings angena emanzini nasegesini ngenxa ye-porosity yawo emihle.I-PTFE empeleni ingafaneleka kumazinga okushisa aphakathi kwe-minus 190 degrees kanye nama-250 degrees.Kungashisa noma kubande kungazelelwe, noma kushise nokubanda ngaphandle kwanoma yimuphi umphumela.Ngaphezu kokuxazulula izinkinga zokukhiqiza amakhemikhali ne-petroleum, amashidi e-tetrafluoroethylene angadlala indima kwezemithi nakweminye imikhakha.Kunezingxenye eziningi zokuvala emakethe namuhla, kanye nemikhiqizo ye-gasket noma ye-gasket.Ngaphezu kwalokho, i-PTFE iphinde isetshenziswe kabanzi ezintweni ezinezidingo zokubeka uphawu, futhi ivame ukusetshenziswa njenge-Jinxining filler.Iqhaza leshidi le-PTFE lihle kakhulu, ngoba ishidi le-PTFE linendima enkulu, izinhlobo eziningi zemikhiqizo, futhi lidlala indima enkulu emikhakheni ehlukahlukene kanye nemikhakha yethonya.I-PTFE ingabonwa yonke indawo empilweni yethu.

Okwesibili, kungakhathaliseki ukuthi hlobo luni lwento yamakhemikhali, kungakhathaliseki ukuthi igqwala kangakanani, i-PTFE ingasetshenziswa.Kungashiwo ukuthi uma ishidi le-PTFE lingakwazi ukuhlangabezana nezidingo zokumelana nokugqwala, azikho ezinye izinto zepulasitiki ezingasetshenziswa.Ngaphezu kokuphikiswa kwayo okuhle kakhulu kwamakhemikhali, izakhiwo zayo zemishini nazo zivelele kakhulu, okwenza ifanelekele ukusetshenziswa ezikhathini ezinokuguquka okukhulu nokugoba.

Ishidi le-PTFE lisetshenziswa kabanzi kumapulasitiki obunjiniyela afana nokushisa okuphezulu okungu-260 ℃, izinga lokushisa eliphansi -196 ℃, ukumelana nokugqwala kwe-asidi ne-alkali, ukumelana nesimo sezulu kanye nobuthi obungeyona ubuthi.I-PTFE ingabonakala ezimbonini zikaphethiloli, zamakhemikhali, zezokwelapha, zikagesi ngisho nezokudla.Ukuthi ipuleti le-PTFE linobuthi futhi linokumelana okuhle nokugqokwa, liyinto enhle yokuvala.I-PTFE (i-Polytetrafluoroethylene, efushanisiwe ngokuthi i-PTFE), ngokuvamile ebizwa ngokuthi "i-non-stick coating" noma "impahla ehlanzekile kalula".Le nto inezici zokumelana ne-asidi ne-alkali nokumelana nezinyibilikisi ezihlukahlukene eziphilayo, futhi cishe ayincibiliki kuzo zonke izincibilikisi.Ngasikhathi sinye, ipuleti le-PTFE linezici zokumelana nokushisa okuphezulu kanye ne-coefficient ephansi kakhulu yokungqubuzana.Ngaphezu kokugcoba, inqubo yokukhiqiza ye-PTFE plate coating isiphinde yaba i-coating efanelekile yokuhlanza kalula ungqimba lwangaphakathi lwamapayipi amanzi.


Isikhathi sokuthumela: Jul-18-2022