Ukuvela kwe-Polytetrafluoroethylene (PTFE) - kusukela kumkhiqizo we-niche osetshenziswa kuphela kuzinhlelo zokusebenza zenani eliphezulu kuya kumfuneko evamile kuye kwaba kancane kancane.
Kodwa-ke, phakathi namashumi amabili eminyaka adlule ukusetshenziswa kwe-PTFE kubonakala kweqe inqwaba ebucayi, okuyivumela ukuthi ikwazi ukuhweba ezimbonini ezingaphezu kuka-200 zezinhlelo zokusebenza zemboni, abathengi nezokwelapha.Futhi ngenkathi amashidi, izinduku, okokugqoka kanye nezingxenye kuyikona ingxenye enkulu yemakethe yemikhiqizo ye-PTFE, ishubhu le-PTFE nepayipi le-PTFE manje kuvela njengendawo ebalulekile yokukhula.
PTFE tube izicelo
Ukusetshenziswa kweI-PTFE tubeisabalale kuzo zonke izinhlelo zokusebenza ezihlanganisa ezezimoto, zamakhemikhali, zikagesi nezezokwelapha.Ithebula 1 libonisa izici eziyinhloko ezichaza ukuguquguquka kwe-PTFE tube, kuyilapho i-Fig 1 ibonisa ukusetshenziswa kwayo emikhakheni ehlukahlukene.
Ezinhlelweni zezimoto, ikhono le-PTFE lokumelana nezinga lokushisa elingaphezu kuka-250°C liyenza ibe ikhandidethi efanelekile yokudluliswa koketshezi lokushisa eliphezulu.
Ezicelweni zokwelapha,I-PTFE tubeidingeka kakhulu ngenxa yokuthambisa kwayo kanye nokungabi namandla kwamakhemikhali.Ama-catheter asebenzisa ishubhu le-PTFE angafakwa emzimbeni womuntu ngaphandle kokwesaba ukusabela noma ukuhuzuka nganoma yiziphi izitho zomzimba.
Ezisetshenziswa zamakhemikhali - okuhlanganisa amalabhorethri - i-PTFE iyindawo ekahle yengilazi ngenxa yokungabi namandla kwayo kanye nokuqina.
Ezinhlelweni zikagesi, izici ezinhle kakhulu ze-dielectric ze-PTFE emsulwa ziyenza ifanelekele ukuvalela amakhebuli kagesi aphezulu.
Izinhlobo ze-PTFE tube
Ngokuya ngohlelo lokusebenza, ishubhu ye-PTFE ihlukaniswe izigaba ezintathu ezibanzi - ngasinye sichazwa ububanzi beshubhu kanye nobukhulu bodonga (bheka Ithebula 2).
Ngisho nangaphakathi kwezigaba, ishubhu le-PTFE liziboleka ezinhlobonhlobo ezahlukene, ngalinye livumela uhlelo lokusebenza oluhlukile (bona Ithebula 3):
PTFE tube emakethe idivayisi yezokwelapha
Ngokuvamile, ithubhu ye-spaghetti encane yobubanzi isetshenziswa ezinhlelweni zezokwelapha.Ukusetshenziswa kwe-PTFE kule ndawo kugxile ezintweni ezimbili ezibalulekile: i-lubricity kanye ne-biocompatibility.Ama-fluoropolymers akhombisa ukuthambisa okuhle kakhulu uma kuqhathaniswa namanye amapulasitiki.I-PTFE i-polymer egcotshwe kakhulu etholakalayo, ene-coefficient of friction engu-0.1, ilandelwa yi-fluorinated ethylene propylene (FEP), ene-0.2.Lawa ma-polymer amabili amelela iningi lawo wonke amashubhu e-fluoropolymer asetshenziswa kumishini yezokwelapha.
I-biocompatibility yanoma iyiphi i-polymer esetshenziswa kudivayisi yezokwelapha iyinkinga esobala.I-PTFE ihamba phambili kule ndawo futhi inomlando omude wokusetshenziswa kwe-vivo.Ama-fluoropolymer ebanga lezokwelapha kufanele ahlangabezane nezidingo zokuhlola ze-USP Class VI kanye ne-ISO 10993.Yiqiniso, ukucubungula inhlanzeko nakho kuyisici esibalulekile.
Eminyakeni engu-18 edlule, i-Besteflon igxile ngokuqhubekayo ekwakhiweni kwe-PTFE Tubes nepayipi le-PTFE.Njengamaphayona endaweni yokukhiqiza i-fluoroplastics, siphishekela ikhwalithi engcono kakhulu kanye nesevisi yangemuva kokuthengisa.Uma ungathanda ukuqala ukwenza ngokwezifiso ishubhu le-PTFE ukuze wenze isicelo sakho esikhethekile, sicela ukhululeke ukusithinta!
Isikhathi sokuthumela: Jun-12-2023