I-Polytetrafluoroethylene noma i-PTFE (evame ukwaziwa kakhulu ngokuthi i-polymer) iyi-fluoropolymer yepulasitiki eguquguqukayo eguquguqukayo kakhulu;yenziwa i-free-radical polymerisation yama-molecule amaningi e-tetrafluoroethene, futhi ifaneleka ezinhlobonhlobo zezicelo ezimbonini ezihlukahlukene njenge-aerospace, imboni yokudla neziphuzo, ezemithi kanye nezokuxhumana.
Ikhiqizwe i-AFT Fluorotec ngezinduku noma amashubhu anoma yimuphi usayizi, noma agcwaliswe ngengilazi, ikhabhoni, insimbi engagqwali noma ezinye izinto eziningi zokwandisa ukumelana nokugqokwa namandla, kungakhathaliseki ukuthi iphrojekthi yakho noma ukwakha, siqinisekile ukuthi sizoba nezinto ezizokusebenzela. .
IZIMPAWU EZISEMQOKA ZE-PTFEUma ubuzama ukusungula impahla eguquguqukayo kakhulu, imelana namakhemikhali, ukumelana nokushisa, okunganamatheli futhi imelana ngogesi, futhi bekungakenziwa, ubungathemba ukuthi ungathola impahla ndawana thize. icishe ifane ne-PTFE kulezi zindawo.
Iphuzu lokuncibilika le-PTFE licishe libe ngu-327°C, futhi i-PTFE emsulwa icishe ifane ngokuphelele namakhemikhali, ayincibiliki kakhulu kuzincibilikisi eziningi noma amakhemikhali, futhi izinzile ngokokushisa ngokwanele ukuze isetshenziswe phakathi -200 degrees C kanye +260 degrees C ngaphandle kokwehlisa isithunzi.
Ezinye izinto eziwusizo ze-PTFE amandla ayo aguquguqukayo aphezulu, ngisho nasemazingeni okushisa aphansi, ukumelana nogesi okuphezulu namandla e-dielectric, ukumelana namanzi (ngenxa ye-fluorine's high electronegativity), kanye ne-coefficient ephansi yokungqubuzana.Ukuminyana kwe-PTFE nakho kuphezulu kakhulu, ku-2200 kg/m3.
Eqinisweni, ngaphezu kokusabela kwamanye ama-agent amakhemikhali nezinyibilikisi (isibonelo, i-chlorine trifluoride, i-cobalt(III) fluoride, i-xenon difluoride noma i-fluorine yokuqala uma ingcindezi ephezulu kanye nezinga lokushisa), okuwukuphela kwesici okufanele sicatshangelwe lapho usebenzisa i-PTFE ukuthi ukuthi ayinakho ukumelana okuhle emisebeni yamandla aphezulu, okuzodala ukuwohloka kwe-molecule ye-PTFE.
I-PTFE Elungisiwe Ngaphezu kwalokho ku-PTFE ehlanzekile, kukhona ama-co-polymer amabili awusizo ngokulinganayo njenge-PTFE, kodwa anezici ezithile ezihlukile.
I-PFA noma i-Perfluoroalkoxy inezinto ezifanayo kakhulu ne-PTFE ngoba ayizwani namakhemikhali kakhulu, iguquguquka futhi izinzile ngokushisa okushisayo (ngokusetshenziswa okuqhubekayo kufika ku-260 degrees C), kodwa ngenkathi i-PTFE inokuthambekela kokukhasa, i-PFA ayizweli futhi ilungele ukusetshenziswa. ukucubungula ukuncibilika, ukubumba umjovo, ukukhishwa, ukubunjwa kokucindezelwa, ukubunjwa kokuvuthela, nokudlulisa ukubumba.
I-TFM, eyaziwa ngokuthi i-PTFE-TFM, iyi-polytetrafluoroethylene ene-perfluoropropylvinylether njengesilungisi esengeziwe, enikeza into ecinene eqinile, futhi ekwazi ukumelana ne-PFA, futhi eshiselekayo.EGCWALIWE I-PTFEPure noma i-PTFE eyintombi ingakhubaza kabi ngaphansi komthwalo, kodwa ukusetshenziswa kokugcwalisa kungasiza ngalokhu, nakuba kufanele kuqashelwe ukuthi akuwona wonke ama-PTFE agcwalisiwe alungele ukusetshenziswa nokudla.
Ukwengeza i-filler ku-PTFE kungakhuphula amandla ayo, kuthuthukise ukumelana nokuhuzuka, kwengeze ukuqhutshwa kukagesi nokunye;kodwa-ke, ukungeza ama-filler nakho kunganciphisa ezinye zezakhiwo ze-PTFE ezinenzuzo, ezifana nokumelana namakhemikhali okuzokhawulwa yilokho kwesigcwalisi.
Izihlungi ezisetshenziswayo zingasukela engilazini ngamaphesenti ahlukahlukene, insimbi engagqwali, i-molybdenum disulphide, ikhabhoni noma igraphite, kuye ngokuthi yiziphi izakhiwo okufanele zithuthukiswe.
UBUHLE KANYE NEZINZUZO ZOKUSEBENZISA I-PTFEInzuzo enkulu ye-PTFE ukuguquguquka kwayo, futhi ububanzi bezinhlelo zokusebenza phezu kwemikhiqizo eminingi nezimboni ezahlukene zalokhu kwaziswa kuyamangaza.
Ukusetshenziswa kwe-PTFE kungaba nezinzuzo ezinkulu ekukhiqizeni nasebunjiniyela, hhayi nje ekwenzeni amashubhu noma amalayini okuphatha noma ukugcina amakhemikhali abolayo, kodwa ngokuhlanganisa izingxenye ezinjengamabhere noma izikulufu ukuze kwandiswe ukuphila kwazo zombili izingxenye ngokwazo kanye nemishini eziyizo. ingxenye ye.
Isikulufu esinamekwe nge-PTFE sizomelana nokugqwala, ngenxa yekhono le-PTFE lokuxosha amanzi namafutha, futhi sigcotshwe ngento ukuze sishayele kahle kunoma iyiphi indawo obopha kuyo, ngokungqubuzana okuncishisiwe, okuholela ekugugeni okuncane kukho kokubili isikulufu kanye. ubuso, kanye nesiphetho esihlala isikhathi eside, esivikeleke kakhulu.
Ukungqubuzana nokuguga kungase kube izici ezinama-bearings, futhi ijazi le-PTFE linganikeza izinzuzo ezifanayo nezikulufu zokumboza, ngenzuzo eyengeziwe yokuthi ukumboza nakho kuzomelana nokushisa.
Kuyacaca ukuthi izingxenye ezihlala isikhathi eside, ezisebenza kahle kakhulu zinganezela ekusebenzeni kahle kwanoma yimuphi umshini, zinciphise isidingo sokuhlala zithola izingxenye ezishintshayo, kokubili konga imali nesikhathi esidingekayo ukuze kulingane okushintshwayo, kanye nokunciphisa imfucuza.Lokhu kuzophinde kunciphise nezidingo zokunakekela njengoba mancane amathuba okuba kube namaphutha emishinini, futhi futhi kunciphise kakhulu, noma kuqede ngisho, noma isiphi isikhathi esibizayo sokukhiqiza ngenxa yamaphutha noma ukulungiswa.
Ukuhlanzwa kwemishini kungabuye kwehliswe kwezinye izimo njengoba ijazi le-PTFE lingamanzisi, lisiza ukuzihlanza kwezingxenye.
Futhi i-polymer textile finishes ingasiza ngisho nemvelo, ngoba, uma isetshenziselwa indwangu, isiphetho sizoxosha amabala amanzi namafutha, ukunciphisa isidingo sokusebenzisa ukuhlanza okomile, futhi izindwangu zizokoma ngokushesha, zisebenzisa amandla amancane ngokumiswa kwe-tumble, futhi ihlala isikhathi eside ngenxa yokuncipha kokuguga.
Ngezinzuzo ezengeziwe zokuthi i-PTFE ayinabo ubuthi, inokungqubuzana okuncane kuphela kwabantu kusuka ku-polymer fume fever (kuphela uma izinga lokushisa lanoma yimaphi amapani ane-polymer-coated lifinyelela ku-260 degrees C) futhi igunyaziwe yi-FDA futhi iphephile ekudleni, lokhu kwaziswa ngempela. inenzuzo enkulu ezindaweni eziningi ezahlukene.UKUSETSHENZISWA KWE-PTFEA OKUDAKALISAYO kanye nokuhlanganisa yonke into kusukela kumapani kuya kumabheringi, i-PTFE iphinde isetshenziselwe ukumisa izinambuzane ezikhuphukayo ezindongeni njengoba impahla 'inganamathi' kangangokuthi izinambuzane (kanye nama-geckos) azikwazi ukubamba.I-polymer isetshenziswa njalo njenge i-coating kuma-catheter ukuvimbela amagciwane kanye nezifo futhi ibuye isetshenziswe njengento yokuxhunyelelwa ekuhlinzeni.
Uyobe uzwile nge-Gore-Tex, futhi yi-PTFE futhi, kulokhu njengolwelwesi oluncane, olunezimbobo ukwenza imvula ephefumulayo iguge, noma okokufakelwa kwezokwelapha, ukuvala izintambo nama-sealant.
Ukhumbula ukuthi i-PTFE yatholwa ngengozi ejabulisayo ngo-1938, kunzima ukucabanga umhlaba wethu namuhla ngaphandle kwayo.
Uma uthanda ukusebenzisa i-PTFE kunoma yimaphi amaphrojekthi akho, noma uma ungathanda ukuthola ulwazi olwengeziwe mayelana nezakhiwo ze-PTFE, sicela usithinte futhi singajabula ukukuxoxa ngezindlela ongakhetha kuzo.
Isikhathi sokuthumela: May-30-2020