Polytetrafluoroethylene, cyangwa PTFE, ni ibikoresho bikunze gukoreshwa cyane mu nganda hafi ya zose zikomeye. Iyi fluoropolymer ikoresha amavuta menshi kandi ikoreshwa mu buryo bwinshi ikora ku bantu bose kuva ku nganda z’indege n’iz’imodoka (nk’igipfundikizo cy’ubushyuhe ku nsinga) kugeza ku kubungabunga ibikoresho by’umuziki (iboneka mu bikoresho by’umuringa n’iby’imbaho bikoreshwa ku bice byabyo bigenda). Birashoboka ko ikoreshwa cyane ari nk’ubuso budafata ku nkono n’amasafuriya. PTFE ishobora gukorwamo ibice byabumbwe; ikoreshwa nk’imiyoboro yoroshye, imiyoboro y’amasafuriya, imiyoboro y’amashanyarazi, imiyoboro y’amashanyarazi, imiyoboro y’amashanyarazi, n’ibikoresho; kandi igashyirwamo imiyoboro.
Ubudahangarwa bukabije bw'imiti n'ubudahangarwa bw'imiti, ndetse n'imiterere yoroheje ariko ikomeye ya PTFE, bituma igira akamaro kanini mu gukora no gukoresha ibikoresho by'ubuvuzi. Kubera ko ifite ubushobozi buke cyane bwo gukururana (ni ukuvuga uburyo bwa mibare bwo kuvuga ko ubuso bunyerera cyane),Umuyoboro wa PTFEishobora gukoreshwa mu kohereza imiti ikaze cyangwa ibikoresho by'ubuvuzi bigomba kubungabungwa kandi bigakenera ko binyuzwa mu mubiri mu gihe cyo kubagwa. Imiyoboro ya PTFE iraryoshye cyane, irakomera kandi ni nto ku buryo ikwiriye cyane kuri catheter ID (imbere mu murambararo) aho ibikoresho nka stent, balloons, atherectomy, cyangwa angioplasty bigomba kwinjiramo nta kibazo cyo gupfukirana cyangwa kuziba. Kubera ko nta kintu na kimwe gifata kuri ibi bintu, bishobora kandi kubangamira ubushobozi bwa bagiteri n'ibindi bintu byandura bwo gufata imiyoboro no gutera indwara zandurira mu bitaro.
Izi ngeso zose zitangaje za PTFE bivuze ko hafi ya zose ihuzwa n'ikindi kintu. Niba ikoreshwa nk'igitambaro, nk'agaseke gafunga, cyangwa nk'igitambaro kirimo amakoti ya Pebax n'ibyuma bya pulasitiki bihuza, birashoboka cyane ko igomba gufatisha ikindi kintu. Ushobora kuba warabonye ibyo twavuze: nta kintu na kimwe gifatisha PTFE. Imiterere ituma iki gikoresho gikurura cyane ibigo bikora ibikoresho by'ubuvuzi ikunze guteza ibibazo mu nganda mu gihe cyo guteza imbere no gukora ibicuruzwa. Kugira ngo igitambaro, elastomer, n'ibindi bice by'ibikoresho bifatishe PTFE biragoye cyane kandi bisaba kugenzura neza inzira.
None se, abakora ibintu bakora iki gikoresho kidakoreshwa cyane kandi kidakoreshwa, kandi bamenya bate ko cyafashwe neza cyangwa cyateguwe neza kandi ko cyiteguye gufunga cyangwa gupfunyika?
Akamaro ko gushushanya PTFE mu buryo bwa shimi
Kugira ngo dusobanure impamvu gushushanya ibinyabutabire bikenewe, ni ngombwa gusobanukirwa impamvu PTFE idahuza neza. PTFE igizwe n'imigozi ihamye cyane y'ibinyabutabire, bigatuma bigorana kuyihuza n'ikindi kintu cyose, ndetse no mu gihe gito.
Kubera ko PTFE idakora neza mu buryo bwa shimi, bivuze ko ubuso bwayo budakorana n'ibintu bya shimi iyo ari yo yose ihura na byo, byaba ibyo mu kirere cyangwa ibyo ku buso bw'ibindi bikoresho, ubuso bwayo bugomba guhindurwa mu buryo bwa shimi kugira ngo bufatanye n'insinga, ibyuma, cyangwa imiyoboro irimo gushyirwaho.
Gufatana kose ni inzira ya shimi aho ibice bya molekile 1-5 byo hejuru by’ubuso bikorana n’ibinyabutabire biri ku bice bya molekile 1-5 byo hejuru by’ubuso ubwo aribwo bwose burimo gukoreshwaho. Kubwibyo, ubuso bwa PTFE bugomba gukorwa nk’ubukorano bwa shimi aho kuba ubukorano bwa shimi kugira ngo bufatanye neza. Muri siyansi y’Ibikoresho, ubuso bukora cyane kandi bushishikajwe no gufatana n’izindi molekile bwitwa “ubuso bufite ingufu nyinshi.” Rero PTFE igomba kuva mu “buryo bw’ingufu nke”, ari nabwo busanzwe, ikajya mu “buryo bw’ingufu nyinshi” bushobora gufatana.
Hari uburyo bucye bwo kubikora, harimo no kuvura plasma ikoresha vacuum, kandi hari bamwe bavuga ko bashobora kugera ku buso bushobora guhuza PTFE binyuze mu gusya, gukuba, cyangwa gukoresha primers zagenewe PVC cyangwa polyolefins. Ariko, uburyo busanzwe kandi bwemejwe na siyansi ni uburyo bwitwa chemical etching.
Gucamo ibice bimwe na bimwe by’imigozi ya PTFE ya karuboni-fluorine (igize fluoropolymers zose), mu by’ukuri, bihindura imiterere y’ibinyabutabire by’agace kaciwe, biva ku buso budafite umwuka ukajya ku buso bukora kandi bushobora gukorana n’ibindi bintu mu buryo bwa shimi. Ubuso buvamo ntibugira amavuta menshi ariko ubu ni ubuso bushobora gufatirwamo kole, gutegurwa, cyangwa guhuzwa n’ibindi bikoresho, ndetse no kwemerera gucapwa cyangwa gushirwaho.
Guteranya ibintu bikorwa hakoreshejwe uburyo bwa PTFE mu gisubizo cya sodium, nk'uburyo busanzwe bukoreshwa bwa Tetra Etch. Uburyo bwa shimi buvamo hamwe n'ubuso bukuraho molekile za fluorine mu gice cy'umugongo cya karuboni-fluorine cya fluoropolymer, bigatuma atome za karuboni zibura electron. Ubuso bushya buteranya ibintu bufite ingufu nyinshi, kandi iyo buhuye n'umwuka, molekile za ogisijeni, umwuka w'amazi, na hydrogen byemererwa kuguruka kugira ngo bifate umwanya wa molekile za fluorine, bigatuma electron zisubirana. Ubu buryo bwo kugarura ibintu butuma molekile zikora neza ku buso butuma zifatana.
Kimwe mu bintu byiza ku bijyanye no gushushanya ibinyabutabire ni uko ishobora guhindura ibice bike byo hejuru bya molekile hanyuma igasiga ibindi bya PTFE bifite imiterere yayo yose yihariye.
Uburyo bwo kwemeza ko uburyo bwo gushushanya imiti buhuza.
Imiterere y'ingenzi ya PTFE iracyari imwe kuko gushushanya hakoreshejwe imiti bigira ingaruka gusa ku bice bike byo hejuru bya molekile. Ariko, hashobora kubaho ibara ry'umukara cyangwa ibara ry'umukara ku muyoboro. Ihindagurika ry'amabara risa nkaho ridafite aho rihuriye n'uburyo ubuso bufatanye, bityo rero ntugakoreshe iri hinduka ry'amabara nk'ikimenyetso nyacyo cy'uburyo PTFE yashushanyije neza.
Uburyo bwiza bwo kumenya ko gushushanya kwawe ari bwo bwatumye habaho ubwoko bw'ubuso ushaka ni ugukoresha uburyo abakora umwuga bakoresha: gupima inguni ihuza amazi. Ubu buryo bukorwa hakoreshejwe igitonyanga cy'amazi meza cyane kuri PTFE no gupima uko icyo gitonyanga cyitwara. Igitonyanga gito kizazamuka kuko gikururwa cyane kurusha PTFE, cyangwa "kizatoha" kandi kibe gito ku buso kuko gikururwa cyane na PTFE. Muri rusange, uko gushushanya imiti bigenda neza - ni ko inguni ihuza (,igitonyanga giteye neza) izaba nto. Ibi bikunze kwitwa gupima "ubuso bushobora gutoha" kuko, mu by'ukuri, iyo ubuso butose neza kandi igitonyanga cy'amazi kigakwirakwira, ubuso bwinshi buratoha.
Ishushohejuruigaragaza ishusho y'igitonyanga cy'amazi (imbere mu ruziga ruto rw'umuhondo n'ubururu) ku muyoboro wa PTFE mbere yuko gicibwa. Nkuko mubibona, impera y'igitonyanga ikora inguni ya dogere 95 ugereranije n'ubuso bw'umuyoboro.
Ishusho iri hejuru igaragaza igitonyanga cy'amazi nk'icyo cyashyizwe ku muyoboro wa PTFE nyuma yo gucibwa. Ushobora kubona ko igitonyanga cyakwirakwiriye hejuru y'umuyoboro kuko impeta y'umuhondo n'ubururu ari nini. Ibi bivuze ko impande z'umuyoboro zirimo gukora inguni yo hasi ihuza n'ubuso bw'umuyoboro. Kandi iyo upimye iyo nguni ukoresheje igikoresho cya Surface Analyst, ari na cyo aya mashusho yombi yafatiweho, tubona ko, yego, inguni ari dogere 38. Niba ibyo byujuje ibisabwa ku mubare tugomba gukubita kugira ngo uyu muyoboro ufatanye, noneho twamaze kwemeza ko ubuso bwaciwe bihagije.
Kugira ngo ikizamini cy’inguni yo guhuza amazi gikoreshwe neza, ni ngombwa gukorana n’umuhanga mu by’ubuso kugira ngo usobanukirwe neza ingano y’inguni yo kugeramo nyuma yo gushushanya. Ibi bigufasha kubaka inzira yo guhuza ishingiye ku buryo bushobora gupimwa. Kuko niba uzi ko ugomba gukora ubuso bufite inguni yo guhuza, icyo gihe uzi ko nubikora, guhuza kwawe kuzagira icyo gugeraho.
Byongeye kandi, kugira ngo inzira yo gukata neza, ni ngombwa gupima inguni ihuza amazi mbere yuko gukata bibaho. Kugira isuzuma ry'ibanze ry'isuku bigufasha kumenya neza ibipimo by'isuku bigomba kuba kugira ngo ugere ku byo ukeneye mu gukata.
Kubungabunga Ishusho Yawe
Kubika neza PTFE yaciwe ni ingenzi kugira ngo inzira yo gufatana igende neza. Kubika no kubika ibintu ni ahantu hagenzurwa cyane (Critical Control Point - CCP). Izi CCP ziba ahantu hose muri gahunda yose aho ubuso bw'ikintu bushobora guhinduka, haba mu buryo bwiza cyangwa bubi, ndetse wenda utabigambiriye. CCP yo kubika ni ingenzi kuri PTFE yaciwe kuko ubuso bushya bwogejweho imiti bugira ingaruka ku buryo ikintu cyose cyahuye nacyo gishobora guhindura no kwangiza akazi kawe.
Uburyo bwiza bwo kubika PTFE nyuma yo gushonga ni ugukoresha ipaki y'umwimerere yagezemo niba ishobora kongera gufungwa. Niba ibyo bitaboneka, imifuka ifunga UV ni ubundi buryo bwiza. Kura PTFE kure y'umwuka n'ubushuhe uko bishoboka kose, kandi mbere yo kugerageza kuyifata, menya neza ko upima inguni ijyanye n'aho iherereye kugira ngo urebe ko igumanye ubushobozi bwo gufatana.
PTFE ni ibikoresho bidasanzwe bifite akamaro kanini, ariko kugira ngo birusheho kuboneka, bigomba gusigwa mu buryo bwa shimi hanyuma bigashyirwa hamwe mu bihe byinshi. Kugira ngo ibi bikorwe neza, hagomba gukoreshwa ikizamini cy’impinduka mu mikorere y’ibinyabutabire ku buso. Fatanya n’inzobere mu bikoresho isobanukiwe n’imikorere yawe kugira ngo irusheho kunoza imiterere y’ibinyabutabire byawe kandi ishyiremo icyizere mu mikorere yawe.
Igihe cyo kohereza: Nyakanga-17-2023