Polytetrafluoroethylene, kapena PTFE, ndizofala kwambiri zomwe zimagwiritsidwa ntchito pafupifupi pafupifupi makampani onse akuluakulu.Fluoropolymer yonyezimira kwambiri komanso yogwiritsa ntchito zambiri imakhudza aliyense kuchokera kumakampani opanga ndege ndi magalimoto (monga chivundikiro chotchinga pa cabling) mpaka kukonza zida zoimbira (zimapezeka mu valavu yamafuta amkuwa ndi zida zamatabwa zogwiritsidwa ntchito pazigawo zomwe zikuyenda).Mwinamwake ntchito yake yotchuka kwambiri imagwiritsidwa ntchito ngati malo osamata pamiphika ndi mapoto.PTFE akhoza kupangidwa kuumbidwa mbali;amagwiritsidwa ntchito ngati zolumikizira mapaipi osinthika, matupi a valve, zotsekera zamagetsi, zonyamula, ndi magiya;ndi extruded ngati chubu.
Kukaniza kwambiri kwamankhwala ndi kusakhazikika kwamankhwala, komanso zinthu zopepuka koma zolimba za PTFE, zimapangitsa kuti zikhale zopindulitsa kwambiri popanga ndi kugwiritsa ntchito zida zamankhwala.Chifukwa cha kukangana kwake kochepa kwambiri (komwe ndi njira ya masamu yonenera kuti pamwamba ndi poterera modabwitsa),PTFE chubuangagwiritsidwe ntchito kusamutsa mankhwala ovuta kapena zida zachipatala zomwe chiyero chake chiyenera kusamalidwa ndikusowa njira yotetezeka m'thupi panthawi ya opaleshoni.Machubu a PTFE ndi opaka mafuta, olimba komanso owonda kotero kuti ndi abwino kwa ID ya catheter (m'mimba mwake) momwe zida monga ma stents, ma baluni, atherectomy, kapena zida za angioplasty zimafunika kudutsa momasuka popanda kuwopseza nsonga kapena kutsekeka.Chifukwa palibe chomwe chimamatira kuzinthu izi, zitha kusokonezanso kuthekera kwa mabakiteriya ndi tizilombo toyambitsa matenda kumamatira ku chubu ndikuyambitsa matenda obwera kuchipatala.
Makhalidwe onse odabwitsa a PTFE amatanthauza kuti nthawi zonse amakhala omangika ku chinthu china.Ngati ikugwiritsidwa ntchito ngati ❖ kuyanika, ngati chosindikizira gasket, kapena ngati tubing ndi jekete Pebax ndi pulasitiki connective ferrules, n'zoonekeratu kuti ayenera kumamatira zinthu zina.Mwina mwazindikira zomwe tanena kale: palibe chomwe chimamamatira ku PTFE.Zomwe zimapangitsa kuti izi zikhale zokopa kwambiri kumakampani opanga zida zamankhwala zimakondanso kuyambitsa zovuta zopanga panthawi yopanga ndi kupanga.Kupeza zokutira, ma elastomer, ndi zida zina kuti zigwirizane ndi PTFE ndizovuta kwambiri ndipo zimafunikira kuwongolera kokhazikika.
Ndiye, kodi opanga amapanga bwanji zinthu zogwiritsidwa ntchito kwambiri, zosamangika kukhala zomangika?Ndipo akudziwa bwanji kuti yathandizidwa kapena kukonzedwa bwino ndipo ili okonzeka kumangidwa kapena kuvala?
Kufunika kwa Chemical Etching PTFE
Kuti mufotokoze chifukwa chake etching yamankhwala ikufunika, ndikofunikira kumvetsetsa zomwe zimayambitsa kusowa kwa PTFE.PTFE imapangidwa ndi zomangira zokhazikika zamakemikolo, zomwe zimapangitsa kuti zikhale zovuta kuti zigwirizane ndi china chilichonse, ngakhale mwachidule.
Popeza PTFE ndi mankhwala inert, kutanthauza pamwamba sachita ndi mamolekyu aliwonse mankhwala amakumana nawo, kaya mlengalenga kapena pamwamba pa zipangizo zina, pamwamba pake ayenera kusinthidwa mankhwala kuti agwirizane ndi cabling, zitsulo, kapena machubu omwe akugwiritsidwa ntchito.
Kumatira konse ndi njira yamankhwala yomwe zigawo zapamwamba za 1-5 zapamtunda zimalumikizana ndi mankhwala omwe amapezeka pamwamba pa 1-5 ma cell amtundu uliwonse womwe ukugwiritsidwa ntchito.Choncho, pamwamba PTFE ayenera kupangidwa mankhwala zotakasika kusiyana mankhwala inert kuti chomangira bwinobwino.Mu Materials Science, malo omwe amakhala otakasuka komanso ofunitsitsa kugwirizana ndi mamolekyu ena amatchedwa "malo amphamvu kwambiri."Chifukwa chake PTFE iyenera kuchotsedwa ku "mphamvu yotsika", yomwe ili maziko ake, kupita ku "mphamvu zambiri," khalidwe lokhazikika.
Pali njira zingapo zochitira izi, kuphatikiza chithandizo cha vacuum plasma, ndipo pali ena omwe amati atha kukwaniritsa malo otetezeka pa PTFE popanga mchenga, kuwotcha, kapena kugwiritsa ntchito zoyambira zomwe zidapangidwira PVC kapena polyolefins.Komabe, njira yodziwika kwambiri komanso yotsimikiziridwa mwasayansi ndi njira yotchedwa chemical etching.
Etching imaphwanya zina za carbon-fluorine zomangira za PTFE (zomwe zimapanga fluoropolymers onse), kwenikweni, kusintha mawonekedwe a mankhwala a malo okhazikika, kuwatenga kuchoka pamtunda kupita kumalo omwe akugwira ntchito komanso amatha kuyanjana ndi zinthu zina. .Pamwamba pake pamakhala mafuta ochepa koma tsopano ndi malo omata, kuumbidwa, kapena kumangiriza ku zinthu zina, komanso kulola kuti adindidwe kapena kuzokotedwapo.
Etching imachitidwa poyika PTFE mu sodium solution, monga Tetra Etch yomwe imagwiritsidwa ntchito kwambiri.Zotsatira za mankhwala zomwe zimachitika pamtunda zimachotsa mamolekyu a fluorine kuchokera ku carbon-fluorine msana wa fluoropolymer kusiya maatomu a carbon omwe alibe ma elekitironi.Malo omwe angokhazikika kumene amakhala ndi mphamvu zambiri, ndipo akakumana ndi mpweya, mamolekyu a okosijeni, nthunzi yamadzi, ndi haidrojeni amaloledwa kuwulukira m'malo mwa mamolekyu a fluorine, zomwe zimalola kubwezeretsedwa kwa ma electron.Kubwezeretsa kumeneku kumabweretsa filimu yogwira ntchito ya mamolekyu pamwamba omwe amathandiza kumamatira.
Chimodzi mwa zinthu zazikulu za etching mankhwala ndi kuti amatha kusintha pamwamba ochepa maselo zigawo ndi kusiya ena onse a PTFE ali ndi zonse wapadera katundu.
Momwe Mungatsimikizire Kusasinthika kwa Chemical Etch Process.
Pachimake katundu wa PTFE amakhalabe chimodzimodzi popeza etching mankhwala amangokhudza pamwamba ochepa maselo zigawo.Komabe, pakhoza kukhala bulauni kapena tani tinting ku tubing.Kusiyanasiyana kwamitundu sikukuwoneka kuti kukugwirizana ndi momwe mtunda ulili wokhazikika, kotero musagwiritse ntchito kusinthika uku ngati chisonyezero chenicheni cha momwe PTFE inakhazikitsidwa.
Njira yabwino yodziwira kuti etching yanu idapanga mtundu wamtunda womwe mumatsata ndikugwiritsa ntchito njira yomwe akatswiri onse amagwiritsira ntchito: kuyeza kolumikizana ndi madzi.Njirayi imachitika poyika dontho lamadzi oyeretsedwa kwambiri pa PTFE ndikuyesa momwe dontholo limakhalira.Dontho ting'onoting'ono limakhala ngati mkanda chifukwa limakopeka kwambiri kuposa PTFE, kapena "lidzanyowa" ndikuphwanyila pamwamba chifukwa limakopeka ndi PTFE.Nthawi zambiri, chiwongolero chamankhwala chikapambana kwambiri - m'pamenenso njira yolumikizirana (, kutsika kosalala) kudzakhala kotsika.Izi nthawi zambiri zimatchedwa kuyesa "kunyowa" kwa pamwamba chifukwa, makamaka, ngati pamwamba pakhazikika bwino ndipo dontho la madzi likufalikira, zambiri za pamwamba zimanyowa.
Chithunzipamwambaikuwonetsa mawonedwe apamwamba a dontho la madzi (mkati mwa mphete yaying'ono yachikasu ndi yabuluu) pa PTFE tubing isanakhazikitsidwe. chubu.
Chithunzi pamwambapa chikuwonetsa dontho lofanana lamadzi lomwe limayikidwa pa chubu cha PTFE pambuyo pokhazikika.Mutha kudziwa kuti dontholo lafalikira pamwamba pa chubu chifukwa mphete yachikasu ndi yabuluu ndi yayikulu.Izi zikutanthawuza kuti m'mphepete mwa dontho likupanga njira yolumikizirana yotsika ndi pamwamba pa chubu.Ndipo tikayesa ngodyayo ndi chipangizo cha Surface Analyst, chomwe zithunzi zonse ziwirizi zidatengedwako, tikuwona kuti, inde, mbaliyo ndi madigiri 38.Ngati izi zikukwaniritsa zomwe tidakonzeratu pa nambala yomwe tikuyenera kugunda kuti titsimikizire kuti chubu iyi ndi yomangika, ndiye kuti tangotsimikizira kuti pamwambayo yakhazikika mokwanira.
Kuti mugwiritse ntchito bwino kuyesa kwa ngodya yamadzi, ndikofunikira kuti mugwire ntchito ndi Surface Scientist kuti mumvetsetse kuti ndi ma angle otani omwe mungafikire pambuyo pa etch yanu.Izi zimakupatsani mwayi wopanga njira yolumikizirana yodziwikiratu potengera zomwe munganene.Chifukwa ngati mukudziwa kuti muyenera kupanga pamwamba ndi ngodya inayake yolumikizirana, ndiye kuti mukudziwa kuti mukatero, kumamatira kwanu kudzakhala kopambana.
Kuphatikiza apo, kuti muwonetsetse kuti ma etching akuyenda bwino, ndikofunikira kuti muyese ngodya yamadzi musanayambe kuyika.Kupeza kuwunika koyambira kwaukhondo kumakupatsani mwayi wodziwa bwino zomwe magawo a etch ayenera kukhala kuti mukwaniritse zomwe mukufuna.
Kusunga Makhalidwe Anu
Kusungidwa koyenera kwa PTFE yokhazikika ndikofunikira kuti muzitha kumamatira bwino.Kusungirako ndi kufufuza ndi Critical Control Point (CCP).Ma CCP awa ali paliponse muzochitika zonse zomwe pamwamba pa chinthu chimakhala ndi mwayi wosintha, zabwino kapena zoipa, ndipo mwina mosadziwa.CCP yosungirako ndiyofunika kwambiri pa PTFE yokhazikika chifukwa malo omwe atsukidwa ndi mankhwala amakhala otakasuka kotero kuti chilichonse chomwe chingakhudze chingasinthe ndikuchepetsa ntchito yanu.
Njira yabwino yosungira PTFE post-etch ndiyo kugwiritsa ntchito zoyikapo zoyambira zomwe zidafikako ngati zingathekenso.Ngati palibe, ndiye kuti matumba a UV-blocking ndi njira yabwino.Sungani PTFE kutali ndi mpweya ndi chinyezi momwe mungathere, ndipo musanayese kugwirizanitsa nayo, onetsetsani kuti mwatenga muyeso wa ngodya kuti muwonetsetse kuti yasunga mphamvu yake yolumikizana.
PTFE ndi chinthu chodabwitsa chomwe chili ndi ntchito zambiri, koma kuti mupindule nazo, chiyenera kukhala chokhazikika komanso chomangika nthawi zambiri.Kuonetsetsa kuti izi zachitika mokwanira, chiyeso chomwe chimakhudzidwa ndi kusintha kwa mankhwala pamtunda chiyenera kugwiritsidwa ntchito.Gwirizanani ndi katswiri wazopanga zinthu yemwe amamvetsetsa momwe mumapangira kuti akweze bwino chiwongolero chanu ndikukhazikitsa chitsimikiziro mumayendedwe anu.
Nthawi yotumiza: Jul-17-2023