I-PTFE iyipulasitiki eqinile kunazo zonke eyaziwa njengamanje. Isetshenziswa kabanzi ezimbonini ezahlukahlukene ezinezindawo ezinzima. Ngenxa yokusebenza kwayo okuhle kakhulu, kancane kancane iye yaba umkhiqizo oyinhloko emikhiqizweni yepulasitiki (Yonke ibizwa ngokuthi i-Polytetrafluoroethylene). Ngakho-ke, kukhona nabakhiqizi abaningi abakhiqiza imikhiqizo enjalo. I-PTFE ingenziwa ibe izinhlobo eziningi zemikhiqizo, njengemibhobho, izinduku, amapuleti, ama-gasket, amafilimu, njll., asetshenziswa emikhakheni eyahlukahlukene.
Iyini ithubhu ye-PTFE?
I-Polytetrafluoroethylene (efushaniswe ngokuthi i-PTFE), eyaziwa kakhulu ngokuthi "i-Plastic King", iyi-polymer ephezulu yama-molecule etholakala ngokushintsha i-tetrafluoroethylene njenge-monomer, emhlophe noma ekhanyayo. Le nto ayinazo izingcezu zombala noma izithasiselo, futhi inezici zokumelana ne-asidi ne-alkali, ukumelana nezinyibilikisi ezahlukahlukene zezinto eziphilayo, futhi cishe ayincibiliki kuzo zonke izinyibilikisi. Ngaphezu kwalokho, i-PTFE inobubanzi obukhulu bokushisa futhi ingasetshenziswa isikhathi eside ku--65°C ~ 260°C ngaphansi kwengcindezi evamile. Ikhiqizwa ngendlela yokukhipha i-paste. Amapayipi e-PTFE akhiqizwa kusetshenziswa i-paste extrusion ayaguquguquka futhi angakhiqiza amapayipi e-PTFE anobubanzi bangaphakathi obuncane njengo-0.3 mm kuze kufike ku-100 mm kanye nobukhulu bodonga obuncane njengo-0.1 mm kuya ku-2 mm. Ngakho-ke, amapayipi e-polytetrafluoroethylene (PTFE) angumkhiqizo oguquguqukayo kakhulu onikeza izinhlelo zokusebenza eziningi ezimbonini eziningi ezahlukene.
Kungani amashubhu e-PTFE esetshenziswa kabanzi:
1. Ukumelana nokushisa okuphezulu, okungancibiliki kunoma yisiphi isinyibilikisi. Ingamelana nokushisa okuphezulu okufika ku-300 °C ngesikhathi esifushane, futhi ngokuvamile ingasetshenziswa ngokuqhubekayo phakathi kuka-200 °C no-260 °C, ngokuqina okukhulu kokushisa.
2. Ukumelana nokushisa okuphansi, ukuqina okuhle komshini ekushiseni okuphansi, noma ngabe izinga lokushisa lehla liye ku--65 ℃, ngeke liqhekeke, futhi lingagcina ukunwebeka okungu-5%.
3. Imelana nokugqwala, ayisebenzi kumakhemikhali amaningi kanye nezinyibilikisi, imelana nama-asidi aqinile nama-alkali, amanzi kanye nezinyibilikisi ezahlukahlukene zezinto eziphilayo, ingavikela izingxenye kunoma yiluphi uhlobo lokugqwala kwamakhemikhali.
4. Ukulwa nokuguga, ngaphansi komthwalo omkhulu, kunezinzuzo ezimbili zokumelana nokuguguleka nokunganamatheli. Isikhathi esihle kakhulu sokuguga kumapulasitiki.
5. Ukuthambisa okuphezulu, i-coefficient ephansi kakhulu yokungqubuzana phakathi kwezinto eziqinile. I-coefficient yokungqubuzana iyashintsha lapho umthwalo ushelela, kodwa inani liphakathi kuka-0.05-0.15 kuphela. Ngakho-ke, inezinzuzo zokumelana kokuqala okuphansi kanye nokusebenza okubushelelezi kokwenza ama-bearings.
6. Ukunganamatheli kuyinkinga encane kakhulu yezinto eziqinile, futhi akunamatheli kunoma yiziphi izinto. Cishe zonke izinto ngeke zinamathele kukho. Amafilimu amancane kakhulu nawo abonisa izakhiwo ezinhle zokunganamatheli.
7. Ayinaphunga, ayinambitheki, ayinabo ubuthi, ayisebenzi ngokomzimba, futhi ayinazo izimpendulo ezimbi uma ifakwa emzimbeni njengemithambo yegazi yokwenziwa kanye nezitho zomzimba isikhathi eside.
8. Ilula futhi iguquguquka. Yehlisa kakhulu amandla okusebenza komqhubi.
Ezinye izindlela ezivamile zokusebenzisa amashubhu e-PTFE:
1. Imboni Yamakhemikhali
Ngenxa yokumelana kwawo namakhemikhali amaningi cishe kuwo wonke amakhemikhali, amashubhu e-PTFE afanele ukusetshenziswa embonini yamakhemikhali. Lokhu kufaka phakathi imboni ye-semiconductor. Izinqubo zesimanje ekukhiqizweni kwe-semiconductor zidinga ukulinganisa okuphephile kanye nokuthuthwa koketshezi olubolayo (ama-asidi nezisekelo). Lokhu kungalimaza kakhulu ishubhu lokulethwa ngesikhathi esifushane.
2. Imboni yezimoto
Enjinini yemoto, amapayipi ekhwalithi ephezulu enziwe nge-PTFE asetshenziselwa ukuhwamuka kukaphethiloli kanye nemizila kaphethiloli. Njengepayipi likaphethiloli, amapayipi e-turbocharger, amapayipi okupholisa, amapayipi amabhuleki azenzakalelayo, amapayipi amabhuleki esithuthuthu, amapayipi enjini yedizili, amapayipi okugijima kanye namapayipi okuqondisa amandla. Izici zokumelana nokushisa okuphezulu kanye nokushisa okuphansi, ukumelana nokucindezela okuphezulu, ukumelana nokuguguleka kanye nokumelana nokugqwala kwepayipi le-PTFE zenza libe nokuphila isikhathi eside ngaphandle kokushintshwa njalo.
3. Imboni yokunyathelisa ye-3D
Ekuphrinteni kwe-3D, i-filament kufanele idluliselwe ku-nozzle yokuphrinta, okumele yenziwe ngebanga lokushisa eliphezulu. I-PTFE tube iyi-polymer ethandwa kakhulu embonini yokuphrinta ye-3D ngenxa ye-coefficient yayo yokushisa okuphezulu kanye nezakhiwo ezinganamatheli, ezisiza ekusheleleni izinto kalula kusuka ku-nozzle.
4. Imboni yezokwelapha
Izakhiwo ezikhethekile zamashubhu e-PTFE zihlanganisa nesakhiwo sobuso esilula ukusihlanza. Eminyakeni eyishumi edlule, amashubhu e-PTFE abelokhu esetshenziswa kakhulu kumadivayisi ezokwelapha. Ngenxa yokulingana okuphansi kokungqubuzana kwamashubhu e-PTFE, kusho ukuthi anobuso obubushelelezi kakhulu obungavimbi noma obungasizi ukukhula kwamagciwane. Phakathi kwawo, amapayipi asetshenziselwa ama-cannula, ama-catheter, ama-pipettes kanye nama-endoscope.
5. Imboni yokudla
Ngenxa yokuhlanza okulula kanye nezakhiwo zayo ezinganamatheli, amapayipi e-PTFE angasetshenziswa embonini yokudla. Ikakhulukazi, amapayipi enziwe nge-PTFE engagcwalisiwe afanelekile ngenxa yokungathathi hlangothi kwawo ngokomzimba futhi ahambisana neziqondiso ze-US Food and Drug Administration. Ngakho-ke, kuye kwabonakala sengathi ayinangozi lapho ithintana nepulasitiki nanoma yiluphi uhlobo lokudla.
Ukuthenga amashubhu e-PTFE afanele akukhona nje ukukhetha imininingwane ehlukene yezinhlelo zokusebenza ezahlukene. Okuningi ukukhetha umenzi othembekile. I-Besteflon Fluorine plastic Industry Co., Ltd. igxile ekukhiqizweni kwamapayipi namashubhu e-PTFE asezingeni eliphezulu iminyaka eyi-15. Uma unemibuzo nezidingo, sicela ukhululeke ukuxhumana nathi ukuze uthole iseluleko sobungcweti esengeziwe.
Izihloko Ezihlobene
Isikhathi sokuthunyelwe: Agasti-13-2022