Ukuguquka kwePolytetrafluoroethylene (PTFE) - ukusuka kwimveliso ye-niche esetyenziswe kuphela kwizicelo zexabiso eliphezulu ukuya kwimfuno eqhelekileyo iye yahamba kancinci.
Nangona kunjalo, kule minyaka ingamashumi amabini idlulileyo ukusetyenziswa kwe-PTFE kubonakala ngathi kuwele ubunzima obubalulekileyo, obuvumela ukuba isebenze ngokurhweba kwi-200 yoshishino, abathengi kunye nezicelo zonyango.Kwaye ngelixa amashidi, iintonga, iingubo kunye namacandelo ekona ubuninzi beemarike zeemveliso ze-PTFE, ityhubhu ye-PTFE kunye ne-PTFE hose ngoku zivela njengendawo ephambili yokukhula.
PTFE izicelo ityhubhu
Ukusetyenziswa kwePTFE ityhubhuisasazeke kuzo zonke izicelo ezibandakanya iimoto, iikhemikhali, umbane kunye nezonyango.Itheyibhile 1 ibonisa iimpawu eziphambili ezichaza ukuguquguquka kwe-tube ye-PTFE, ngelixa i-Fig 1 ibonisa ukusetyenziswa kwayo kwiinkalo ezahlukeneyo.
Kwizicelo zeemoto, ukukwazi kwe-PTFE ukumelana namaqondo obushushu angaphezu kwe-250 ° C kuyenza ibe ngumgqatswa ofanelekileyo wokuhanjiswa kolwelo oluphezulu.
Kwizicelo zonyango,PTFE ityhubhuifunwa kakhulu ngenxa yokuthambisa kwayo kunye nokungangeni kweekhemikhali.Iicatheters ezisebenzisa ityhubhu ye-PTFE zinokufakwa emzimbeni womntu ngaphandle koloyiko lokusabela okanye ukuqhawuka ngawo nawaphi na amalungu omzimba.
Kwizicelo zeekhemikhali – kubandakanywa iilabhoratri – i-PTFE yeyona ndawo ilungileyo yokutshintsha iglasi ngenxa yokungangeni kwayo kunye nokuqina kwayo.
Kusetyenziso lombane, iipropathi ezibalaseleyo zedielectric ze-PTFE enyulu ziyenza ifanelekele ukugquma iintambo zombane ophezulu.
Iindidi ze-PTFE ityhubhu
Ngokuxhomekeke kwisicelo, ityhubhu ye-PTFE yahlulahlulwe yaba ziindidi ezintathu ezibanzi - nganye ichazwa bububanzi betyhubhu kunye nobukhulu bodonga (jonga iTheyibhile 2).
Nangaphakathi kweendidi, ityhubhu ye-PTFE iziboleka kwiiyantlukwano ezahlukeneyo, nganye ivumela usetyenziso olwahlukileyo (bona iTheyibhile 3):
PTFE ityhubhu kwimarike isixhobo zonyango
Ngokuqhelekileyo, ityhubhu ye-spaghetti encinci isetyenziswe kwizicelo zonyango.Ukusetyenziswa kwe-PTFE kule ndawo kumaziko kwiipropati ezimbini eziphambili: i-lubricity kunye ne-biocompatibility.IiFluoropolymers zibonisa ukuthambisa okuhle kakhulu xa kuthelekiswa nezinye iiplastiki.I-PTFE yeyona polymer ithambisayo ekhoyo, ene-coefficient of friction ye-0.1, ilandelwa yi-fluorinated ethylene propylene (FEP), ene-0.2.Ezi polymers zimbini zimele uninzi lwazo zonke ityhubhu ye-fluoropolymer esetyenziswa kwizixhobo zonyango.
I-biocompatibility yayo nayiphi na i-polymer esetyenziswe kwisixhobo sonyango yinkxalabo ecacileyo.I-PTFE iyagqwesa kule ndawo kwaye inembali ende yokusetyenziswa kwe-vivo.Iifluoropolymers zodidi lwezonyango kufuneka zihlangabezane neemfuno zovavanyo lwe-USP Class VI kunye ne-ISO 10993.Kakade ke, ukucoceka kukwayinto ebalulekileyo.
Kwiminyaka eyi-18 edlulileyo, i-Beseflon igxile ngokuqhubekayo ekwenziweni kwe-PTFE Tubes kunye ne-PTFE hose.Njengoovulindlela kwindawo yokuvelisa i-fluoroplastics, silandela owona mgangatho ubalaseleyo kunye nenkonzo emva kokuthengisa.Ukuba ungathanda ukuqalisa ukwenza ityhubhu ye-PTFE kwisicelo sakho esikhethekileyo, nceda uzive ukhululekile ukuqhagamshelana nathi!
Ixesha lokuposa: Jun-12-2023