Iyiphi impahla eyenziwe nge-ptfe tube?
Isingeniso somkhiqizo
1,I-tube ye-Ptfeelinye igama le-polytetrafluoroethylene, isifinyezo sesiNgisi sithi PTFE, (esivame ukwaziwa ngokuthi "Inkosi Yepulasitiki, Hara"), kanye nefomula yamakhemikhali ithi -(CF2-CF2)n-.I-Polytetrafluoroethylene yatholwa ngengozi ngo-1938 ngusokhemisi uDkt. Roy J. Plunkett eDuPont.'s Jackson Laboratory eNew Jersey, eU.SA Lapho ezama ukwenza i-chlorofluorocarbon entsha Esimeni sesiqandisi esiyinhlanganisela.Imikhiqizo yalesi sici ngokuvamile ibizwa ngokuthi "i-non-stick coating";iyimpahla ye-polymer yokwenziwa esebenzisa i-fluorine ukuze ithathele wonke ama-athomu e-hydrogen ku-polyethylene.Le nto ayizwani nama-asidi, ama-alkali, nezinyibilikisi ezihlukahlukene eziphilayo, futhi cishe ayincibiliki kuzo zonke izincibilikisi.Ngesikhathi esifanayo, i-PTFE inezici zokumelana nokushisa okuphezulu, futhi i-coefficient yayo yokungqubuzana iphansi kakhulu, ngakho-ke ingasetshenziswa njengendlela yokugcoba, futhi isibe yindwangu ekahle yongqimba lwangaphakathi lwamabhodwe anganamathele. namapayipi amanzi
Le mikhiqizo isetshenziswa kakhulu emikhiqizweni elandelayo:
I-PTFE, FEP, PFA, ETFE, AF, NXT, FFR.
I-PTFE: I-PTFE (i-polytetrafluoroethylene) i-non-stick coating ingasetshenziswa ngokuqhubekayo ku-260°C, ngokushisa okuphezulu kokusetshenziswa okungu-290-300°C, i-coefficient ye-friction ephansi kakhulu, ukumelana kahle nokugqokwa kanye nokuzinza okuhle kakhulu kwamakhemikhali.
I-FEP: I-FEP (i-ethylene propylene copolymer eyi-fluorinated) i-non-stick copolymer iyancibilika futhi igeleze yakhe ifilimu engenazimbobo ngesikhathi sokubhaka.Inokusimama okuhle kwamakhemikhali kanye nezici ezinhle kakhulu zokunganamathele.Izinga lokushisa eliphezulu lokusebenzisa lingama-200℃.
I-PFA: I-PFA (inhlanganisela ye-perfluoroalkyl) i-non-stick coating iyancibilika futhi igeleze ngesikhathi sokubhaka ukuze yakhe ifilimu engeyona i-porous efana ne-FEP.Inzuzo ye-PFA ukuthi inezinga lokushisa eliphakeme lokusebenzisa eliqhubekayo lama-260°C, ukuqina nokuqina okuqinile, futhi ifaneleka ikakhulukazi ukusetshenziswa ekunqandeni ukunamathela kanye nezicelo zokumelana namakhemikhali ngaphansi kwezimo eziphezulu zokushisa.
I-PTFE (i-Polytetrafluoroethene) iwukwenziwa kwe-polymer material esebenzisa i-fluorine ukuze imiselele wonke ama-athomu e-hydrogen ku-polyethylene.Le nto ayizwani nama-asidi, ama-alkali, nezinyibilikisi ezihlukahlukene eziphilayo, futhi cishe ayincibiliki kuzo zonke izincibilikisi.Ngesikhathi esifanayo, i-ptfe tube inezici zokumelana nokushisa okuphezulu, futhi i-coefficient yayo yokungqubuzana iphansi kakhulu, ngakho-ke ingasetshenziselwa ukugcoba, futhi isibe isimbozo esifanelekile sama-woks ahlanzekile namapayipi amanzi.Ingasetshenziselwa ukumelana nokugqwala kwamapayipi, ukumelana nokushisa okuphezulu nokuphansi, nokumelana nokugqwala.Isetshenziswa ezindaweni ezinokhahlo njengokuthambisa, ubunjiniyela, ugesi, izinto zikagesi, kanye nezindiza.
Izici zomkhiqizo
I-1, Ukumelana nokushisa okuphezulu nokuphansi: umphumela omncane ekushiseni, uhla lokushisa olubanzi, izinga lokushisa elisebenzayo -65 ~ 260 ℃.
2, Okunganamatheli: Cishe zonke izinto aziboshiwe kufilimu ye-PTFE.Amafilimu azacile kakhulu nawo akhombisa ukusebenza okuhle okungaphazamisi.2. Ukumelana nokushisa: Ifilimu yokugqoka ye-PTFE inokumelana nokushisa okuhle kakhulu nokumelana nokushisa okuphansi.Ingakwazi ukumelana namazinga okushisa afika ku-300°C ngesikhathi esifushane, futhi ngokuvamile ingasetshenziswa ngokuqhubekayo phakathi kuka-240°C no-260°C.Inokuqina okushisayo okubalulekile.Ingasebenza emazingeni okushisa aqandayo ngaphandle kwe-embrittlement futhi ayincibiliki emazingeni okushisa aphezulu.
I-3, Indawo eshelelayo: Ifilimu yokuhlanganisa ye-PTFE ine-coefficient ephezulu yokungqubuzana.I-coefficient yokushayisana iyashintsha lapho umthwalo uslayida, kodwa inani liphakathi kuka-0.05-0.15 kuphela.
I-4, Ukumelana nomswakama: Ingaphezulu lefilimu yokugqoka ye-PTFE ayinamathele emanzini namafutha, futhi akulula ukunamathela kusixazululo ngesikhathi sokusebenza kokukhiqiza.Uma kukhona ukungcola okuncane, vele usule.Isikhathi esifushane esichithwe, ukonga amahora okusebenza kanye nokwenza ngcono ukusebenza kahle komsebenzi.
I-5, Ukumelana nokugqoka: Inokumelana okuhle kakhulu kokugqoka ngaphansi komthwalo omkhulu.Ngaphansi komthwalo othile, unezinzuzo ezimbili zokumelana nokugqoka nokungaphazamisi.
I-6, Ukumelana nokugqwala: I-PTFE ayigqwali neze ngamakhemikhali, futhi ingamelana nawo wonke ama-acids aqinile (kuhlanganise ne-aqua regia) nama-oxidants aqinile ngaphandle kwezinsimbi ze-alkali ezincibilikisiwe, imidiya e-fluorinated ne-sodium hydroxide ngaphezu kuka-300 ° C.Iqhaza le-ejenti yokunciphisa kanye nezincibilikisi ezihlukahlukene eziphilayo zingavikela izingxenye kunoma yiluphi uhlobo lokugqwala kwamakhemikhali
impahla yamakhemikhali
I-1, I-Insulation: Akuthintwa imvelo kanye nemvamisa, ukumelana nevolumu kungafinyelela ku-1018 ohm · cm, ukulahlekelwa kwe-dielectric kuncane, futhi i-voltage yokuwohloka iphezulu.
2, High and low lokushisa ukumelana: umthelela kancane izinga lokushisa, ububanzi lokushisa ububanzi, izinga lokushisa elisebenzayo -190 ~ 260 ℃.
3, Ukuzigcoba ngokwakho: Ine-coefficient encane yokungqubuzana phakathi kwamapulasitiki futhi iyinto efanelekile yokugcoba engenawo uwoyela.
I-4, ukunganamatheli kobuso: izinto eziqinile ezaziwayo azikwazi ukunamathela phezulu, ziyizinto eziqinile ezinamandla amancane kakhulu angaphezulu.
I-5, Ukumelana nesimo sezulu, ukumelana nemisebe kanye nokungena okuncane: ukuchayeka isikhathi eside emkhathini, indawo engaphezulu nokusebenza kuhlala kungashintshile.
6, Ukungashi: Inkomba yomkhawulo we-oxygen ingaphansi kwama-90.
I-7, i-PTFE isetshenziswa kabanzi ezimbonini ezidinga ukumelana nokushisa okuphezulu kanye ne-viscosity ephezulu.I-super acid-fluoroantimonic acid enamandla kakhulu ingase isetshenziselwe ukulondolozwa
Indawo yesicelo somkhiqizo
I-Polytetrafluoroethylene ingakhiwa ngokusunduza noma ukukhipha;ingenziwa futhi ibe yifilimu bese isikwa ibe yitheyiphu ye-PTFE efakwe kushaft uma isetshenziswa ezintanjeni ezisezingeni eliphezulu.Isetshenziselwa ukukhiqiza izintambo eziphezulu zefrikhwensi futhi yenziwe ngokuqondile ekuhlakazweni kwamanzi.Ingasetshenziselwa ukumboza, ukumilisela noma ukwenza i-fiber.
I-Polytetrafluoroethylene isetshenziswa kabanzi ezimbonini ezifana namandla enuzi, ezokuvikela kazwelonke, i-aerospace, electronics, ugesi, amakhemikhali, imishini, amathuluzi, amamitha, ukwakhiwa, izindwangu, ukwelashwa kwendawo yensimbi, imithi, ukunakekelwa kwezokwelapha, ukudla, insimbi nokuncibilikisa, njll. izinto ezisetshenziswayo, izinto zokuvikela imvelo, okokuvikela induku, njll. kukwenza kube umkhiqizo ongabuyiseleki.
Ipayipi le-PTFEinezindawo ezivelele eziphelele eziphelele, ukumelana nokushisa okuphezulu, ukumelana nokugqwala, okungagxili, ukuzithambisa, izakhiwo ezinhle kakhulu ze-dielectric, kanye ne-coefficient ephansi kakhulu yokungqubuzana.Isetshenziswa njengamapulasitiki wobunjiniyela, ingenziwa ibe amashubhu e-PTFE, izinduku, amabhande, amapuleti, amafilimu, njll. Ivamise ukusetshenziswa kumapayipi amelana nokugqwala, iziqukathi, amaphampu, amavalvu, irada, imishini yokuxhumana yamaza aphezulu, okokusebenza komsakazo, ama-radome, njll. enezidingo zokusebenza eziphezulu.Ukwengeza noma yikuphi ukugcwalisa okungakwazi ukumelana nokushisa kwe-sintering ye-polytetrafluoroethylene, izakhiwo zayo zemishini zingathuthukiswa kakhulu.Ngesikhathi esifanayo, ezinye izakhiwo ezinhle kakhulu ze-PTFE ziyagcinwa.Izinhlobo ezigcwele zihlanganisa i-glass fiber, insimbi, i-metal oxide, i-graphite, i-molybdenum disulfide, i-carbon fibre, i-polyimide, i-EKONOL, njll.
Ukusesha okuhlobene nepayipi le-ptfe:
Isikhathi sokuthumela: Jan-07-2021