Polytetrafluoroethylene, lossis PTFE, yog cov khoom siv dav siv hauv yuav luag txhua qhov kev lag luam loj.Qhov no ultra-lubricious thiab multi-siv fluoropolymer kov txhua leej txhua tus los ntawm aerospace thiab automotive industries (raws li ib tug insulating npog ntawm cabling) mus rau suab paj nruas ntsuas ntsuas (nws tau pom nyob rau hauv lub valve roj tooj dag thiab woodwind instruments siv rau lawv tsiv chaw).Tej zaum nws qhov kev siv nto moo tshaj plaws yog siv los ua ib qho chaw uas tsis yog lo rau ntawm lub lauj kaub thiab lauj kaub.PTFE tuaj yeem tsim rau hauv molded qhov chaw;siv los ua cov yeeb nkab sib txuas, lub cev valve, hluav taws xob insulators, bearings, thiab iav;thiab extruded li tubing.
Cov tshuaj lom neeg tsis zoo thiab tshuaj lom neeg tsis muaj zog, nrog rau lub teeb yuag tsis tau muaj zog ntawm PTFE, ua rau nws muaj txiaj ntsig zoo hauv kev tsim khoom thiab siv cov khoom siv kho mob.Vim tias nws cov coefficient tsis tshua muaj kev sib txhuam (uas yog ib txoj hauv kev ua lej ntawm kev hais tias saum npoo yog nplua nuj heev),PTFE tubingtuaj yeem siv los hloov cov tshuaj hnyav lossis cov cuab yeej kho mob uas nws purity yuav tsum tau khaws cia thiab xav tau kev nyab xeeb rau hauv lub cev thaum phais.PTFE tubing yog li lubricated, resilient thiab nyias uas nws yog zoo meej rau ib tug guiding catheter ID (sab hauv txoj kab uas hla) qhov twg cov cuab yeej xws li stents, balloons, atherectomy, los yog angioplasty pab kiag li lawm yuav tsum tau xaub los ntawm dawb do yam tsis muaj kev hem thawj ntawm snags los yog kev cuam tshuam.Vim tias tsis muaj dab tsi ua rau cov khoom no, nws tseem tuaj yeem cuam tshuam nrog lub peev xwm ntawm cov kab mob thiab lwm yam kab mob sib kis los ua raws li cov tubing thiab ua rau muaj kab mob hauv tsev kho mob.
Tag nrho cov yam ntxwv zoo kawg no ntawm PTFE txhais tau hais tias nws yuav luag ib txwm sib raug zoo rau lwm yam.Yog tias nws tau siv los ua cov txheej txheem, ua lub sealing gasket, los yog raws li tubing nrog Pebax lub tsho thiab cov yas txuas ferrules, nws yog qhov yuav tsum tau ua raws li lwm cov khoom siv.Tej zaum koj yuav tau pom qhov peb twb hais lawm: tsis muaj dab tsi lo rau PTFE.Cov khoom uas ua rau cov khoom siv no txaus siab rau cov tuam txhab kho mob kuj tseem yuav tsim teeb meem kev tsim khoom thaum tsim khoom thiab tsim khoom.Tau txais cov coatings, elastomers, thiab lwm yam khoom siv los ua raws li PTFE yog qhov nyuaj heev thiab yuav tsum tau tswj cov txheej txheem nruj.
Yog li, yuav ua li cas manufacturers ua qhov no dav siv, unbondable khoom bondable?Thiab ua li cas lawv thiaj paub tias nws tau raug kho los yog npaj kom raug thiab npaj txhij rau daim ntawv cog lus lossis lub tsho?
Qhov tseem ceeb ntawm Chemically Etching PTFE
Txhawm rau piav qhia vim li cas cov tshuaj etching xav tau, nws yuav tsum nkag siab tias qhov ua rau PTFE tsis muaj kev sib raug zoo.PTFE yog tsim los ntawm cov tshuaj ruaj khov heev, uas ua rau nws nyuaj rau nws koom nrog lwm yam, txawm tias luv luv.
Txij li thaum PTFE yog chemically inert, lub ntsiab lus ntawm qhov chaw tsis hnov mob nrog cov tshuaj molecules nws los rau hauv kev sib cuag nrog, tsis hais cov nyob rau hauv cov huab cua los yog cov nyob rau saum npoo ntawm lwm yam ntaub ntawv, nws nto yuav tsum tau chemically hloov nyob rau hauv thiaj li yuav txuas rau cabling, hlau, los yog tubing nws yog siv rau.
Tag nrho cov adhesion yog cov txheej txheem tshuaj uas nyob rau sab saum toj 1-5 cov txheej txheem molecular ntawm ib qho chaw cuam tshuam nrog cov tshuaj uas muaj nyob rau saum 1-5 molecular txheej ntawm txhua qhov saum npoo yog siv rau nws.Yog li ntawd, PTFE nto yuav tsum tau ua chemically reactive as opposed to chemically inert nyob rau hauv thiaj li yuav ua kom tiav daim ntawv cog lus.Hauv Cov Khoom Siv Hluav Taws Xob, qhov chaw uas muaj zog heev thiab mob siab rau kev sib raug zoo nrog lwm cov molecules yog hu ua "high-zog nto."Yog li PTFE yuav tsum tau muab coj los ntawm lub xeev "tsis muaj zog", uas yog nws cov xwm txheej hauv paus, mus rau "lub zog siab," kev sib raug zoo.
Muaj ob peb txoj hauv kev los ua qhov no, suav nrog kev kho cov ntshav plasma, thiab muaj qee tus hais tias lawv tuaj yeem ua tiav qhov chaw ruaj khov ntawm PTFE los ntawm kev xuab zeb, abrading, lossis siv cov primers uas tau tsim los rau PVC lossis polyolefins.Txawm li cas los xij, feem ntau thiab feem ntau cov kev tshawb fawb pom tseeb yog txheej txheem hu ua tshuaj etching.
Etching lov qee cov carbon-fluorine bonds ntawm PTFE (uas ua rau tag nrho cov fluoropolymer), nyob rau hauv qhov tseeb, hloov cov tshuaj lom neeg yam ntxwv ntawm etched cheeb tsam, coj nws los ntawm ib tug inert nto mus rau ib tug active thiab muaj peev xwm chemically cuam tshuam nrog lwm yam tshuaj. .Qhov tshwm sim saum npoo yog tsis tshua muaj roj, tab sis tam sim no yog ib qho chaw uas tuaj yeem ua tau nplaum, molded, los yog khi rau lwm cov ntaub ntawv, nrog rau kev tso cai rau nws luam tawm lossis kos rau.
Etching yog ua los ntawm kev tso PTFE hauv cov tshuaj sodium, zoo li feem ntau siv Tetra Etch.Qhov tshwm sim tshuaj tiv thaiv nrog rau saum npoo tshem tawm cov fluorine molecules los ntawm carbon-fluorine qaum qaum ntawm fluoropolymer tawm carbon atoms uas tsis muaj electrons.Lub ntsej muag tshiab tshiab muaj lub zog siab heev, thiab thaum nws raug huab cua, oxygen molecules, dej vapor, thiab hydrogen raug tso cai ya mus rau qhov chaw ntawm fluorine molecules, tso cai rau cov khoom siv hluav taws xob rov qab.Cov txheej txheem kho dua tshiab no ua rau muaj cov yeeb yaj kiab reactive ntawm cov molecules ntawm qhov chaw uas ua rau muaj adhesion.
Ib qho ntawm cov khoom zoo tshaj plaws ntawm cov tshuaj etching yog tias nws muaj peev xwm hloov tau tsuas yog ob peb txheej molecular saum toj kawg nkaus thiab tawm ntawm cov PTFE kom zoo nrog tag nrho nws cov khoom tshwj xeeb.
Yuav Ua Li Cas Txheeb Xyuas Qhov Zoo Ntawm Cov Txheej Txheem Tshuaj Etch.
Cov khoom tseem ceeb ntawm PTFE tseem zoo ib yam txij li cov tshuaj etching tsuas yog cuam tshuam rau ob peb txheej molecular saum toj kawg nkaus.Txawm li cas los xij, tej zaum yuav muaj xim av lossis xim tinting rau lub raj.Cov xim sib txawv tsis zoo li cuam tshuam rau qhov kev sib raug zoo ntawm qhov chaw yog li cas, yog li tsis txhob siv qhov kev hloov pauv no ua qhov qhia tseeb ntawm qhov zoo ntawm PTFE tau etched.
Txoj hauv kev zoo tshaj plaws kom paub tias koj qhov etching tsim hom ntawm qhov chaw koj nyob tom qab yog siv txoj hauv kev txhua tus kws tshaj lij siv: dej sib cuag lub kaum sab xis ntsuas.Cov txheej txheem no yog ua los ntawm kev tso cov dej purified heev rau ntawm PTFE thiab ntsuas seb qhov poob ntawd coj li cas.Qhov me me poob yuav yog hlaws vim tias nws nyiam nws tus kheej ntau dua li PTFE, lossis nws yuav "ntub tawm" thiab flatten tawm tsam saum npoo vim nws nyiam heev rau PTFE.Feem ntau hais lus, qhov ua tau zoo ntawm cov tshuaj etch - qhov qis dua ntawm lub kaum sab xis ntawm kev sib cuag (, qhov txo qis) yuav yog.Qhov no feem ntau hu ua kev ntsuam xyuas qhov "wettability" ntawm qhov chaw vim tias, qhov tseem ceeb, yog tias qhov chaw etched zoo thiab cov dej ntws tawm, ntau qhov chaw ntub dej.
Daim duabsaum toj noqhia pom sab saum toj ntawm cov dej poob (hauv lub nplhaib me me daj thiab xiav) ntawm PTFE tubing ua ntej nws tau etched.Raws li koj tuaj yeem pom, ntug ntawm qhov poob ua rau lub kaum sab xis ntawm 95 degrees nrog rau saum npoo cev.
Daim duab saum toj no qhia tau hais tias zoo ib yam ntawm cov dej tso rau ntawm lub raj PTFE tom qab tau etched.Koj tuaj yeem qhia tau tias qhov poob tau nthuav tawm ntxiv rau ntawm lub raj dej vim tias lub nplhaib daj thiab xiav loj dua.Qhov no txhais tau hais tias qhov poob ntug yog tsim kom muaj lub kaum sab xis qis dua nrog rau saum npoo ntawm lub raj.Thiab thaum ntsuas lub kaum sab xis nrog Surface Analyst ntaus ntawv, uas ob qho tib si ntawm cov duab no tau coj los ntawm, peb pom tias, yog, lub kaum sab xis yog 38 degrees.Yog tias qhov uas tau ua raws li peb cov kev cai lij choj tau ua rau tus lej uas peb yuav tsum tau ntaus kom ntseeg tau cov raj ntawd yog sib raug zoo, ces peb nyuam qhuav suav tias qhov chaw tau etched txaus.
Rau qhov zoo tshaj plaws ntawm kev siv dej sib cuag lub kaum sab xis, nws yog ib qho tseem ceeb uas yuav tau ua hauj lwm nrog ib tug Surface Scientist kom to taub dab tsi yog qhov zoo tagnrho lub kaum sab xis mus txog tom qab koj etch.Qhov no tso cai rau koj los tsim cov txheej txheem kev sib txuas ua ke raws li qhov muaj peev xwm ua tau.Vim tias yog tias koj paub tias koj yuav tsum tsim qhov chaw nrog ib qho kev sib cuag lub kaum ntse ntse, ces koj paub tias thaum koj ua, koj qhov adhesion yuav ua tiav.
Tsis tas li ntawd, txhawm rau txhawm rau txhawm rau ua kom muaj txiaj ntsig zoo, nws yog ib qho tseem ceeb uas yuav tsum tau ntsuas lub kaum sab xis ntawm dej ua ntej qhov etching yuav tshwm sim.Tau txais kev ntsuam xyuas kev huv huv hauv paus tso cai rau koj kom paub meej tias qhov tsis zoo ntawm qhov etch yuav tsum tau ua kom ncav cuag koj qhov kev xav tau ntawm lub kaum sab xis.
Khaws Koj Etch
Kev khaws cia ntawm etched PTFE yog qhov tseem ceeb rau kev ua tiav adhesion.Kev khaws cia thiab cov khoom lag luam yog Lub Chaw Tswj Xyuas Tseem Ceeb (CCP).Cov CCPs no nyob txhua qhov chaw ntawm tag nrho cov txheej txheem uas qhov chaw ntawm cov khoom muaj lub sijhawm hloov pauv, rau qhov zoo lossis mob, thiab tej zaum tsis txhob txwm ua.Qhov chaw cia CCP yog qhov tseem ceeb rau etched PTFE vim hais tias cov tshuaj ntxuav tshiab tshiab yog li reactive uas txhua yam nws los rau hauv kev sib cuag nrog tuaj yeem hloov thiab degrade koj txoj haujlwm.
Qhov kev coj ua zoo tshaj plaws hauv kev khaws cia PTFE tom qab etch yog siv cov ntim khoom qub uas nws tuaj txog yog tias nws tuaj yeem rov ua dua.Yog tias tsis muaj, ces UV-thaiv lub hnab yog ib qho kev xaiv zoo.Khaws PTFE kom deb ntawm huab cua thiab noo noo ntau npaum li sai tau, thiab ua ntej sim ua daim ntawv cog lus rau nws, xyuas kom koj siv lub kaum sab xis ntawm kev sib cuag los xyuas kom meej tias nws tau tuav nws lub peev xwm sib txuas.
PTFE yog ib qho khoom siv tshwj xeeb nrog ntau daim ntawv thov, tab sis kom tau txais txiaj ntsig zoo tshaj plaws ntawm nws, nws yuav tsum tau chemically etched thiab ces khi rau feem ntau.Txhawm rau ua kom qhov no ua tiav txaus, ib qho kev sim uas nkag siab rau cov tshuaj hloov pauv ntawm qhov chaw yuav tsum tau siv.Koom tes nrog ib tus kws tshaj lij cov ntaub ntawv uas nkag siab txog koj cov txheej txheem tsim khoom kom ua kom zoo dua koj cov etch thiab ua kom muaj kev ntseeg siab rau hauv koj txoj haujlwm.
Post lub sij hawm: Lub Xya hli ntuj-17-2023