Polytetrafluoroethylene, kana PTFE, chinhu chakajairika chinoshandiswa zvakanyanya munenge maindasitiri makuru.Iyi fluoropolymer yakanyanya-lubricious uye yakawanda-inoshandisa inobata munhu wese kubva kune aerospace uye maindasitiri emotokari (sevhavha yekuvharira pacabling) kugadziriso yezviridzwa zvemumhanzi (inowanikwa muvharuvhu mafuta endarira uye zviridzwa zvehuni zvekushandisa pazvikamu zvazvo zvinofamba).Zvichida kushandiswa kwayo kwakakurumbira kunoshandiswa sechinhu chisina tsvimbo pahari nemapani.PTFE inogona kuumbwa kuita zvikamu zvakaumbwa;inoshandiswa semajoini epombi anochinjika, miviri yevharuvhu, insulators yemagetsi, mabhengi, uye magiya;uye yakawedzerwa se tubing.
Iyo yakanyanyisa makemikari kuramba uye inertness yemakemikari, pamwe chete neakareruka asi akasimba zvivakwa zvePTFE, zvinoita kuti zvive zvakanyanya kubatsira mukugadzira uye kushandiswa kwemidziyo yekurapa.Nekuda kweiyo yakadzikira zvakanyanya coefficient yekukwesha (inova nzira yemasvomhu yekureva kuti pamusoro pacho panotsvedza zvinoshamisa),PTFE tubinginogona kushandiswa kuendesa makemikari ane hasha kana maturusi ekurapa ayo kuchena kunoda kuchengetedzwa uye kunoda nzira yakachengeteka kupinda mumuviri panguva yekuvhiyiwa.PTFE tubing ine mafuta, inoshingirira uye yakatetepa zvekuti yakakwana kune inotungamira catheter ID (mukati dhayamita) umo maturusi akaita semastents, mabharumu, atherectomy, kana angioplasty zvishandiso zvinoda kutsvedza nepakati zvakasununguka pasina tyisidziro yehosha kana kuvharika.Nekuti hapana chinonamatira kune ichi chinhu, chinogona zvakare kukanganisa kugona kwebhakitiriya uye mamwe majekiseni anotapukira kunamatira kune tubing uye kukonzera hutachiona hunowanikwa muchipatara.
Zvese izvi zvinoshamisa hunhu hwePTFE zvinoreva kuti inogara yakasungirirwa kune chimwe chinhu.Kana iri kushandiswa seyakaputira, sechisimbiso gasket, kana se tubing nePebax majaketi uye epurasitiki connective ferrules, zvinonyanya kuitika zvinoda kuomerera kune chimwe chinhu.Iwe unogona kunge waona zvatatotaura: hapana chinonamatira kuPTFE.Izvo zvinhu zvinoita kuti chinyorwa ichi chifadze kumakambani emidziyo yekurapa zvakare anowanzo kugadzira matambudziko ekugadzira panguva yekugadzirwa kwechigadzirwa.Kuwana marachi, elastomers, uye zvimwe zvikamu zvemudziyo kuti unamate kuPTFE zvinonetsa zvisingaite uye zvinoda kudzora maitiro akasimba.
Saka, vagadziri vanoita sei kuti ichi chinoshandiswa zvakanyanya, chisingabatike chisungike?Uye vanoziva sei kuti yakabatwa kana kugadzirirwa zvakanaka uye yakagadzirira kusungirirwa kana kupfeka?
Kukosha Kwemakemikari Etching PTFE
Kuti utsanangure kuti sei kemikari etching ichidikanwa, zvinodikanwa kuti unzwisise kuti chii chinokonzera PTFE kushaikwa kwehusungwa.PTFE inoumbwa nekugadzikana kwemakemikari bond, izvo zvinoita kuti zviome kuti ibatane kune chimwe chinhu, kunyangwe muchidimbu.
Sezvo PTFE iine makemikari inert, zvichireva kuti nzvimbo yacho haiite nechero mamorekuru emakemikari aanosangana nawo, angave ari mumhepo kana ayo ari pamusoro pezvimwe zvinhu, nzvimbo yaro inoda kugadziridzwa kemikari kuitira kuti ibatanidze kune cabling, simbi, kana tubing iyo iri kuiswa pairi.
Kunamatira kwese ikemikari maitiro umo epamusoro 1-5 mamorekuru akaturikidzana epamusoro anopindirana nemakemikari aripo pamusoro 1-5 mamorekuru akaturikidzana echero nzvimbo iri kuiswa pairi.Naizvozvo, pamusoro pePTFE inoda kuitwa makemikari reactive kusiyana nekemikari inert kuitira kuti ibatane zvinobudirira.MuMaterials Sayenzi, nzvimbo ine simba rekuita uye ine shungu dzekubatana nemamwe mamorekuru inonzi "high-energy surface."Saka PTFE inoda kutorwa kubva kune "simba rakaderera" nyika, inova mamiriro ayo ekutanga, kune "simba rakakwirira," rinosungirirwa unhu.
Pane nzira shoma dzekuita izvi, kusanganisira kurapwa kwevacuum plasma, uye kune vamwe vanoti vanogona kuwana nzvimbo inosungirirwa paPTFE nejecha, abrading, kana kushandisa maprimers akagadzirirwa PVC kana polyolefins.Zvisinei, nzira inonyanyozivikanwa uye inopupurirwa nesainzi inzira inonzi chemical etching.
Etching inotyora imwe yecarbon-fluorine bond yePTFE (iyo inogadzira ese fluoropolymers), kutaura zvazviri, kushandura kemikari yenzvimbo yakatemerwa, ichiitora kubva kune inert pamusoro kuenda kune iyo inoshanda uye inokwanisa makemikari kusangana nezvimwe zvinhu. .Iyo inenge yabuda inenge isina kuzora mafuta asi iye zvino yava nzvimbo inogona kunama, kuumbwa, kana kusungirirwa kune zvimwe zvinhu, pamwe nokubvumira kuti idhindwe kana kunyorwa.
Etching inoitwa nekuisa iyo PTFE mune sodium mhinduro, senge inowanzoshandiswa Tetra Etch.Mhedzisiro yekemikari inokonzeresa nepamusoro inobvisa mamorekuru efluorine kubva kumusana wecarbon-fluorine wefluoropolymer ichisiya maatomu ekabhoni asina maerekitironi.Nzvimbo ichangobva kugadzirwa ine simba rakawanda kwazvo, uye kana yaiswa kumhepo, mamorekuru eokisijeni, mhute yemvura, uye haidrojeni zvinotenderwa kubhururuka kuti zvitore nzvimbo yemamorekuru efluorine, zvichibvumira kudzoreredzwa kwemaerekitironi.Iyi nzira yekudzorera inoguma mune reactive firimu remamorekuru ari pamusoro anogonesa kunamatira.
Chimwe chezvinhu zvikuru pamusoro pemakemikari etching ndechekuti inokwanisa kushandura mashoma epamusoro mamorekuru akaturikidzana uye kusiya imwe yese yePTFE yakasimba nezvose zvayo zvakasiyana.
Maitiro Ekusimbisa Kuenderana kweChemical Etch Maitiro.
Iwo epakati zvimiro zvePTFE zvinoramba zvakangofanana sezvo kemikari etching inongobata mashoma epamusoro mamolecular layer.Nekudaro, panogona kunge paine brown kana tan tinting kune tubing.Musiyano weruvara hauite seunoenderana nekusungirirwa kwepasi, saka usashandise kusarudzika uku sechiratidzo chaicho chekuti PTFE yakanyatsoiswa.
Nzira yakanakisa yekuziva kuti etching yako yakagadzira mhando yenzvimbo yaunotevera ndeye kushandisa nzira inoshandiswa nenyanzvi dzese: kuyerwa kwemvura yekusangana nemakona.Iyi nzira inoitwa nekuisa donho remvura yakacheneswa zvakanyanya paPTFE uye kuyera kuti donhwe iro rinoita sei.Kadonhwe kadiki kadiki kanogona kukwiridzira nekuti inokwezvwa pairi kupfuura iyo PTFE, kana kuti "inonyorova" uye inotsvedza pamusoro pepamusoro nekuti inokwezvwa nePTFE.Kazhinji kutaura, iyo inonyanya kubudirira iyo kemikari etch - iyo yakaderera iyo yekuona kona (, iyo inoteedzera kudonha) ichave.Izvi zvinowanzonzi kuyedza "kunyorova" kwepasi nekuti, zvakanyanya, kana nzvimbo yakadzikwa nemazvo uye donhwe remvura richipararira kunze, yakawanda yepasi inonyorova.
Mufananidzokumusoroinoratidza kutarisa kwepamusoro-pasi kwedonhwe remvura (mukati mediki yero uye yebhuruu mhete) paPTFE tubing isati yaiswa.Sezvaunogona kuona, kumucheto kwekudonha kunoita 95-degree angle nepamusoro pe. chubhu.
Mufananidzo uri pamusoro unoratidza donho remvura rakafanana rakaiswa paPTFE chubhu mushure mekuiswa.Iwe unogona kutaura kuti donho rakapararira mberi pamusoro pehubhu nokuti mhete yero uye yebhuruu yakakura.Izvi zvinoreva kuti kudonhedza mupendero kuri kugadzira yakaderera yekuona kona nepamusoro petubhing.Uye kana kuyera kona iyo neSurface Analyst mudziyo, iyo miviri iyi mifananidzo yakatorwa kubva, tinoona kuti, hongu, kona i38 degrees.Kana izvo zvikasangana nezvinodiwa zvedu zvakafanotemerwa nhamba yatinofanira kurova kuti tive nechokwadi chekuti chubhu inosungirirwa, saka isu tangosimbisa kuti nzvimbo yacho yakadzikwa zvakakwana.
Kuti unyatso shandisa mvura yekubata angle bvunzo, zvakakosha kuti ushande neSurface Scientist kuti unzwisise kuti ndeipi yakanakira angle renji yekusvika mushure me etch yako.Izvi zvinokutendera iwe kuti uvake inofanofungidzira yekubatanidza maitiro zvichienderana neiyo quantifiable yakatarwa.Nekuti kana iwe uchiziva kuti iwe unofanirwa kugadzira nzvimbo ine imwe yekuona kona, saka iwe unoziva kuti kana wadaro, kunamatira kwako kuchabudirira.
Pamusoro pezvo, kuti ive nechokwadi chekuita etching maitiro, zvakakosha kuti utore mvura yekubata kona kuyerwa kusati kwaitika.Kuwana yekutanga hutsanana ongororo inobvumidza iwe kuti uzive chaizvo izvo maparamendi e etch anofanirwa kunge ari kuitira kuti usvike pane yako yekuona angle zvinodiwa.
Kuchengeta Etch Yako
Kuchengeta kwakaringana kwe etched PTFE kwakakosha kune yakabudirira yekunamatira maitiro.Kuchengetera uye hesitori iCritical Control Point (CCP).Aya maCCP ari chero kupi mukuita kwese uko pamusoro pechinhu chine mukana wekuchinja, kune zvakanaka kana kurwara, uye pamwe nekusaziva.Iyo CCP yekuchengetera yakakosha kune yakatemerwa PTFE nekuti ichangobva kucheneswa makemikari nzvimbo inoshanda zvekuti chero chainosangana nacho chinogona kushandura nekudzikisira basa rako.
Iyo yakanakisa tsika yekuchengetedza PTFE post-etch ndeye kushandisa yekutanga kurongedza iyo yakasvika kana ichivharika.Kana izvo zvisipo, saka UV-kuvharira mabhegi ndiyo yakanaka imwe nzira.Chengetedza PTFE kure nemhepo uye unyoro zvakanyanya sezvinobvira, uye usati waedza kusungira kwairi, ita shuwa kuti watora yekuona kona kuyerwa kuti uone kuti yakachengetedza kugona kwayo kwekubatanidza.
PTFE chinhu chinoshamisa chine zvuru zvekushandisa, asi kuti uwane zvakanyanya kubva pachiri, chinofanira kunge chakaiswa kemikari uye chobva chasungwa kazhinji.Kuti ive nechokwadi chekuti izvi zvaitwa zvakakwana, bvunzo ine hanya nekuchinja kwemakemikari pamusoro inofanira kushandiswa.Batana nenyanzvi yezvigadzirwa inonzwisisa maitiro ako ekugadzira kukwidziridza etch yako uye kuisa chokwadi mukufambiswa kwebasa rako.
Nguva yekutumira: Jul-17-2023