PTFE yog hu ua "tus huab tais ntawm plastics".Roy Planck, leej txiv ntawm fluororesin, pib kawm Freon cov kev hloov pauv ntawm DuPont hauv Tebchaws Meskas hauv xyoo 1936. Lawv tau sau ib feem ntawm tetrafluoroethylene thiab khaws cia rau hauv cov fwj steel, npaj rau kev sim tom ntej hnub tom qab, Tab sis thaum lub siab txo valve. ntawm lub tog raj kheej tau qhib rau hnub tom qab, tsis muaj roj ntau dhau.Lawv xav tias nws tau tawg, tab sis thaum ntsuas lub tog raj kheej, lawv pom tias lub tog raj kheej tsis poob qhov hnyav.Lawv pom qhib lub raj mis steel thiab pom muaj ntau cov hmoov dawb, uas yog polytetrafluoroethylene (teflon).
PTFE yog hu ua "tus huab tais ntawm plastics".Roy Planck, leej txiv ntawm fluororesin, pib kawm Freon cov kev hloov pauv ntawm DuPont hauv Tebchaws Meskas hauv xyoo 1936. Lawv tau sau ib feem ntawm tetrafluoroethylene thiab khaws cia rau hauv cov fwj steel, npaj rau kev sim tom ntej hnub tom qab, Tab sis thaum lub siab txo valve. ntawm lub tog raj kheej tau qhib rau hnub tom qab, tsis muaj roj ntau dhau.Lawv xav tias nws tau tawg, tab sis thaum ntsuas lub tog raj kheej, lawv pom tias lub tog raj kheej tsis poob qhov hnyav.Lawv pom qhib lub raj mis steel thiab pom muaj ntau cov hmoov dawb, uas yog polytetrafluoroethylene (teflon).
Cov yam ntxwv thiab cov khoom:
Cov khoom siv kho tshuab ntawm PTFE yog qhov muag muag.PTFE muaj cov khoom ua tau zoo heev:
- Kub kub kuj:Kev siv lub sijhawm ntev kub ntawm 200 ~ 260 degrees;
- Tsawg kub tsis kam:tseem mos ntawm -100 degrees;
- Corrosion kuj:tsis kam mus rau aqua regia thiab tag nrho cov kuab tshuaj organic;
- Huab cua tsis kam:pom kev laus lub neej nyob rau hauv yas;
- High lubrication:yam tsawg kawg nkaus coefficient ntawm kev sib txhuam (0.04) hauv plastics;
- Tsis-viscous:yam tsawg kawg nkaus nro nyob rau hauv cov ntaub ntawv uas tsis adhering tej yam khoom;
- Tsis muaj tshuaj lom:Nrog lub cev tsis muaj zog thiab cov khoom siv hluav taws xob zoo heev, nws yog cov khoom siv hluav taws xob zoo C-Class, cov ntawv xov xwm tuab txheej tuaj yeem thaiv qhov hluav taws xob siab ntawm 1500V.Nws yog smoother tshaj dej khov.
Kev sib txhuam coefficient ntawm PTFE yog tsawg heev, tsuas yog 1/5 ntawm polyethylene, uas yog ib qho tseem ceeb feature ntawm perfluorocarbon nto.Thiab vim hais tias lub zog inter molecular ntawm fluorine-carbon saw yog qhov tsawg heev, PTFE tsis khov.PTFE tswj cov khoom zoo heev hauv qhov kub ntawm -196 txog 260 ° C. Ib qho ntawm cov yam ntxwv ntawm perfluorocarbon polymers yog tias lawv tsis nkig ntawm qhov kub thiab txias.PTFE muaj qhov ceev ntawm 2.14-2.20g / cm33, nrog yuav luag tsis muaj dej nqus, thiab qhov sib npaug ntawm qhov nqus dej tsawg dua 0.01%.PTFE yog ib hom mos mos thiab tsis muaj zog polymer.Lub zog sib nqus ntawm cov macromolecules yog me me, thiab qhov tawv, hardness, thiab lub zog me me.Nws yuav deform nyob rau hauv lub sij hawm ntev kev ntxhov siab.
Technology Txheej txheem cej luam
Suspension polymerization:Nyob rau hauv lub polymerization kettle, dej siv raws li ib tug nruab nrab, ammonium persulfate siv raws li ib tug pib, thiab dilute hydrochloric acid siv raws li ib tug activator, tetrafluoroethylene yog polymerized ntawm ib tug siab ntawm 0.5-2 MPa thiab 40-45 ℃ kom tau dawb hais, thiab mus tau cov hmoov polytetrafluoroethylene nrog ntau qhov sib txawv tom qab mashing, sib tsoo, thiab ziab.
Dispersion polymerization:Ib qho me me ntawm dispersant (ammonium perfluorooctanoate) thiab stabilizer (fluorocarbon compound) tau ntxiv los pib polymerization nrog redox catalyst.Polymerization muab faib ua siab siab thiab tsis tshua muaj siab.Qhov siab siab yog 2 MPa thiab 25 ℃, thiab qhov siab qis yog 0.6-0.7 MPa thiab 0-38 ℃.Cov tshuaj polytetrafluoroethylene polymerization yog tsim los ntawm dispersion polymerization, thiab dispersion resin yog tau los ntawm coagulation, ziab, thiab tshuaj ntsuam. Los ntawm dispersion polymerization, nyob rau hauv qhov kev txiav txim ntawm ion-dawb dej thiab ntau yam auxiliaries, ib tug dawb emulsion yog tsim.Lub emulsion yog evaporated thiab concentrated los ntawm ib tug concentration kettle los tsim ib tug concentrated kua, uas yog, dispersed emulsion.
Dispersion resin muaj kev ua haujlwm zoo dua thiab kev ua haujlwm ntawm cov khoom.Polytetrafluoroethylene yog refractory thiab tsis muaj fluidity.Nws qhov loj me me thiab cov duab particle muaj qhov cuam tshuam tseem ceeb ntawm yaj fluidity, nws cov khoom ua haujlwm thiab cov khoom siv.Qhov sib txawv ntawm qhov zoo ntawm cov resins tshem tawm thiab dispersed resins yog vim lawv cov particle loj, particle loj tis, thiab particle morphology.Lub qub muaj ib tug millimeter particle loj, thaum lub tom kawg muaj ib tug submicron loj (250-350nm).Suspended resins tuaj yeem moulded thiab ua tiav, tab sis tsis tuaj yeem extruded nyob rau hauv daim ntawv paste, thaum dispersed resins siv tau rau paste extrusion.Qhov hnyav molecular thiab crystallinity ntawm PTFE dispersing resins feem ntau siab dua li cov resins tshem tawm, nrog crystallinity mus txog 96-98%, thiab lub neej khoov qaug zog yog 2300 zaug ntev dua li cov resins tshem tawm.
Qhov loj me me ntawm cov dispersed resin ua los ntawm emulsion polymerization yog me me, qhov loj me me yog qhov tsim nyog, thiab cov particle morphology tswj tau, yog li nrog kev ua haujlwm zoo thiab kev ua haujlwm ntawm cov khoom.
Tam sim no, kwv yees li ob feem peb ntawm PTFE resins yog tsim los ntawm txoj kev raug ncua thiab ib feem peb los ntawm txoj kev dispersion.
Nyob rau hauv 2019, muaj tag nrho ntawm 12 domestic PTFE ntau lawm tuam txhab uas muag nrog ib tug tag nrho muaj peev xwm ntawm 140,000 tons / xyoo, accounting rau ntau tshaj 40% ntawm lub ntiaj teb no ntau lawm muaj peev xwm.Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias Tuam Tshoj tus PTFE muaj peev xwm tsim tau tsuas yog txhaj tshuaj molding qib nruab nrab thiab qis kawg khoom.
Tuam Tshoj tus PTFE muaj peev xwm ntau lawm yog cov concentrated.Cov tuam txhab loj tshaj plaws hauv kev lag luam suav txog li 83% ntawm tag nrho cov peev txheej tsim khoom.Tus thawj coj kev lag luam, Dongyue Group, nyob ze li ib feem peb ntawm kev ua lag luam.
Nyob rau hauv 2019, nws yog kwv yees hais tias lub domestic PTFE tso zis yog hais txog 90,000 tons, feem ntau yog nyob rau hauv txhaj tshuaj molding qib nruab nrab thiab qis-kawg cov khoom, thiab high-end PTFE resin localization tus nqi yog tsawg heev, uas yog hnyav nyob rau hauv imports.Tuam Tshoj yog Net exporter ntawm PTFE.Nyob rau hauv 2004, Tuam Tshoj tus PTFE export ntim ntau tshaj qhov ntshuam ntim, thiab nws muaj peev xwm nthuav dav heev los ntawm 2010 mus rau 2012, thiab nws export ntim tau nce xyoo los ntawm lub xyoo.Nyob rau hauv 2010, Tuam Tshoj tus PTFE export ntim ntau tshaj 20,000 tons thawj zaug thiab tseem nyob ib ncig ntawm 20,000 tons / xyoo txog tam sim no.Lub ntim ntim tau tuav ib tug ruaj khov scale ntawm 5000-6000 tons, ntawm uas 70-80% imported PTFE yog siab. -Kev hloov kho cov khoom kom tau raws li cov kev xav tau ntawm cov kev lag luam hauv qab rau cov khoom lag luam PTFE high-end.Tam sim no, Tuam Tshoj lub high-end PTFE yog tsuas yog muab los ntawm txawv teb chaws tuam txhab uas muag xws liDaikinnyob rau hauv Nyiv,DuPontnyob rau hauv lub tebchaws United States.
Cov ntawv thov tseem ceeb ntawm 5G
Nrog rau kev txhim kho txuas ntxiv ntawm 5G kev sib txuas lus thev naus laus zis, qhov kev thov rau cov khoom siv sib xws thiab cov khoom siv hluav taws xob tsawg kuj nce ntxiv. Cov ntaub ntawv fluorine muaj cov rwb thaiv tsev zoo heev thiab tsis yooj yim cuam tshuam los ntawm cov xov tooj cua ntau zaus.Fluoropolymers muaj cov khoom zoo uas tsis muaj dielectric thiab qhov poob qis hauv cov xwm txheej siab.Lawv muaj peev xwm muab tau ultra-siab frequencies thiab high-ceev kev ua tau zoo rau cov chaw zov me nyuam cov ntaub ntawv, cov teeb liab kis tau tus mob, thiab cov khoom siv hluav taws xob ntawm tus kheej.Yog li ntawd, nrog rau kev nrawm ntawm 5G, kev lag luam xav tau rau kev ua haujlwm siab fluoropolymer kuj nce ntxiv.
Cov ntawv thov tseem ceeb yog 5G kev sib txuas lus high-speed cables, semiconductors, PCBs thiab kav hlau txais xov.
High-frequency thiab high-ceev cable
Teflon resin txhim kho hluav taws xob kev ua tau zoo ntawm cable rwb thaiv tsev cov khoom thiab cov tsho thiab muab lawv nrog kev nyab xeeb hluav taws tsis sib haum.Cov yam ntxwv no yog qhov tseem ceeb heev rau kev xaim hluav taws xob (xws li High-speed cable) rau hauv cheeb tsam network (LAN), cov chaw zov me nyuam, thiab lwm yam kev siv kev sib txuas lus zoo.Yog li ntawd, fluoropolymers yuav siv rau ntawm cov kab sib kis ntau zaus nrog ntau lub zog, cov ntaub ntawv loj sib kis, thiab cov ntsiab lus siab.
Kev tsim khoom semiconductor
5G cuam tshuam rau kev txhim kho ntawm kev lag luam semiconductor thiab hloov cov kev xav tau ntawm kev lag luam.PTFE polymers kuj ua lub luag haujlwm tseem ceeb hauv cov txheej txheem tsim khoom semiconductor.
PCB thiab kav hlau txais xov Cheebtsam
Hauv 5G era, cov ntawv luam tawm Circuit Boards (PCBs) yuav nyob ntawm cov khoom siv fluoropolymer ua haujlwm siab, uas tuaj yeem txhim kho qhov zoo ntawm 5G kis tau tus mob.PTFE yog siv rau prepreg Cheebtsam hauv PCBs thiab kav hlau txais xov tshuab kom ua tiav cov kev sib txuas siab.
Post lub sij hawm: Feb-26-2019