Ukuvela kwe-Polytetrafluoroethylene (PTFE) – kusukela kumkhiqizo okhethekile osetshenziswa kuphela ezicelweni ezinenani eliphezulu kuya kwesidingo esivamile kuye kwaba kancane kancane.
Kodwa-ke, eminyakeni engamashumi amabili edlule ukusetshenziswa kwe-PTFE kubonakala sengathi kuye kwadlula ezingeni elibalulekile, okuvumela ukuthi ikwazi ukusebenza kwezentengiselwano ezindaweni ezingaphezu kuka-200 zezimboni, zabathengi kanye nezokwelapha. Futhi ngenkathi amashidi, izinduku, izembozo kanye nezingxenye kuyizinto eziyinhloko emakethe yemikhiqizo ye-PTFE, ithubhu le-PTFE kanye nepayipi le-PTFE manje sekuvela njengendawo ebalulekile yokukhula.
Izinhlelo zokusebenza ze-PTFE tube
Ukusetshenziswa kweIshubhu le-PTFEisakazeke kuzo zonke izinhlelo zokusebenza ezahlukahlukene okuhlanganisa izimoto, amakhemikhali, kagesi kanye nezokwelapha. Ithebula 1 likhombisa izakhiwo ezibalulekile ezichaza ukuguquguquka kwe-PTFE tube, kanti i-Fig 1 ikhombisa ukusetshenziswa kwayo emikhakheni eyahlukene.
Ezisetshenzisweni zezimoto, ikhono le-PTFE lokubekezelela amazinga okushisa angaphezu kuka-250°C lenza kube yindawo efanelekile yokudluliselwa koketshezi lokushisa eliphezulu.
Ezicelweni zezokwelapha,Ishubhu le-PTFEIdingeka kakhulu ngenxa yokuthamba kwayo kanye nokungasebenzi kahle kwamakhemikhali. Ama-catheter asebenzisa ithubhu le-PTFE angafakwa emzimbeni womuntu ngaphandle kokwesaba ukusabela noma ukukhuhlana nanoma yiziphi izingxenye zomzimba.
Ezisetshenzisweni zamakhemikhali – kufaka phakathi amalabhorethri – i-PTFE iyindawo ekahle yokufaka esikhundleni sengilazi ngenxa yokungangeni kwayo kanye nokuqina kwayo.
Ekusetshenzisweni kukagesi, izakhiwo ezinhle kakhulu ze-dielectric ze-virgin PTFE zenza ifaneleke kahle ekufakeni izintambo zikagesi ezinamandla aphezulu.
Izinhlobo ze-PTFE tube
Kuye ngesicelo, ithubhu ye-PTFE ihlukaniswe ngezigaba ezintathu ezibanzi – ngasinye sichazwa ububanzi bethubhu kanye nobukhulu bodonga (bheka Ithebula 2).
Ngisho nangaphakathi kwezigaba, ithubhu le-PTFE lizivumela ukuhlukahluka okuhlukile, ngalinye livumela uhlelo lokusebenza oluhlukile (bheka Ithebula 3):
Ishubhu le-PTFE emakethe yamadivayisi ezokwelapha
Ngokuvamile, ishubhu elincane le-spaghetti lisetshenziswa ezinhlotsheni zezokwelapha. Ukusetshenziswa kwe-PTFE kule ndawo kugxile ezicini ezimbili ezibalulekile: ukuthambisa kanye nokuhambisana kwezinto eziphilayo. Ama-fluoropolymer abonisa ukuthambisa okuhle kakhulu uma kuqhathaniswa namanye amapulasitiki. I-PTFE iyi-polymer ethambisa kakhulu etholakalayo, ene-coefficient of friction engu-0.1, ilandelwe yi-fluorinated ethylene propylene (FEP), ene-0.2. Lawa ma-polymer amabili amelela iningi elikhulu lawo wonke amashubhu e-fluoropolymer asetshenziswa kumadivayisi ezokwelapha.
Ukuhambisana kwezinto eziphilayo kwanoma iyiphi i-polymer esetshenziswa kudivayisi yezokwelapha kuyinto esobala ekhathazayo. I-PTFE ivelele kule ndawo futhi inomlando omude wokusetshenziswa ngaphakathi emzimbeni. Ama-fluoropolymer ebanga lezokwelapha kufanele ahlangabezane nezidingo zokuhlolwa ze-USP Class VI kanye ne-ISO 10993. Yiqiniso, ukucubungula inhlanzeko nakho kuyisici esibalulekile.
Eminyakeni eyi-18 edlule, i-Besteflon igxile kakhulu ekukhiqizweni kwama-PTFE Tubes kanye ne-PTFE hose. Njengamaphayona emkhakheni wokukhiqiza ama-fluoroplastics, siphishekela ikhwalithi engcono kakhulu kanye nensizakalo yangemva kokuthengisa. Uma ungathanda ukuqala ukwenza ngokwezifiso i-PTFE tube yesicelo sakho esikhethekile, sicela ukhululeke ukuxhumana nathi!
Isikhathi sokuthunyelwe: Juni-12-2023