Fluoroplastic: specifications, GOST

Polyacetal - ib tug hluavtaws polymer khoom uas feem ntau siv nyob rau hauv cov tshuaj, hluav taws xob thiab khoom noj khoom haus kev lag luam feem ntau raws li coatings. Nws zoo xws li feem ntau cov kev siv ntawm ib tug dav ntau yam kub thiab ib tug tsawg coefficient ntawm tsis sib haum xeeb.

Lus Txhais thiab Hom

Fluorines hais txog ob peb hom fluorine-muaj yas. Feem ntau cov feem ntau nyob rau hauv lub muaj thiab tsev neeg siv polytetrafluoroethylene. Nyob rau hauv lub chaw tsim tshuaj paus, qhov no cov ntaub ntawv uas tej zaum yuav hu ua txawv. Nyob rau hauv tshwj xeeb khw muag khoom noj Russia muag xws li mas polytetrafluoroethylene. Material ua nyob rau hauv lub teb chaws USA, hu ua "Teflo" nyob rau hauv ces - "Flyuon" nyob rau hauv lub teb chaws Yelemees "Gostaflon". Peb nyob rau hauv Russia nws yog lub npe hu ua teflon-4.

Lwm yam ntau ntau yam ntawm no cov ntaub ntawv uas yog tsis muaj dav kis, tab sis kuj nrov heev. Lawv yog:

• Polytrifluorochloroethylene (PTFE-3);
• Polyvinylidene fluoride (PTFE-2);
• Lwm yam copolymers ntawm fluorinated ethylene.

txoj kev siv thiab ua

Tau tag nrho cov tsiaj los ntawm tshuaj txhais tau tias. Nyob rau hauv qhov tseeb, lawv yog polymers uas fluorine atoms yog ntxiv. Li no lawv lub npe.

Fluoroplastic-4 yog tsim raws li ib tug dawb hmoov thiab ces nias thiab sintered thaum muaj kev kub kub. Lwm yam hom ntawm no cov ntaub ntawv uas yog feem ntau yog npaj los ntawm quenching.

Nyob rau hauv lub chaw ua khoom ntawm ntau txoj kev niaj hnub cov khoom siv yog Teflon. Specifications tiag tiag xwb zoo. Qhov zoo ntawm cov khoom no muaj xws li:

• High tshuaj kuj. PTFE-4 tsis yaj txawm nyob rau hauv boiling aqua regia.
• Inertness thiab tsawg porosity.
• Tus heev tsawg tsis sib haum xeeb coefficient. Qhov no xam yog nyob rau hauv PTFE tseem yuav luag tib yam rau tag nrho cov muaj peevxwm.
• Rau yav tom ntej dielectric zog. Qhov no insulator khoom tshua txawm nyob rau hauv 200 ° c.
• Stability. Tshuaj thaj chaw ntawm fluoroplastic-4 tsis hloov ntawm ib tug kub mus txog -300 c.
• Nplaim kuj - lwm kom zoo dua ntawm ib tug khoom xws li Teflon. Cov yam ntxwv (ib tug kub-resistant polymer tsiag ntawv los ntawm muaj peev xwm rau nws tus kheej-extinguishing) tso cai rau nws thiab nws cov kev siv nyob rau hauv qhov chaw ntawm siab tua hluav taws uas muaj feem yuav.
• Gas ceev ceev.
• Biocompatibility. Qhov no hom ntawm yas yog feem ntau siv los mus ua kom cov hniav yas.

disadvantages PTFE

Raws li koj tau pom, cov khoom no yog heev zoo siab thiab yuav luag universal - Teflon. Nws muaj tus yam ntxwv cia li zoo. Tab sis, ntawm chav kawm, nws muaj ib co drawbacks. Rau cov neeg muaj xws li:

• High txias txaus. Qhov no tej khoom vaj tse yog dog dig txwv rau kev siv ntawm PTFE nyob rau hauv electronics.
• Muaj peev xwm faib teeb meem tshuaj thaum rhuab saum toj no 300 c.
• Loj nyob rau hauv kev sib piv nrog rau lwm cov polymers, thiab tus luj tsis yog ib yam nkaus thiab zoo coj kuj.

qhov twg siv

Fluorine yas yog siv nyob rau hauv ntau qhov chaw ntawm kev khwv nyiaj txiag. Heev feem ntau nws yog siv:

• Nyob rau hauv lub automotive kev lag luam. Txij li thaum lub sib haum xeeb coefficient ntawm cov khoom yog heev me me, vim hais tias nws ua high-zoo bearings, kev sib txhuam units, txhawb ob txhais ceg thiab thiaj li nyob. D.
• Nyob rau hauv qhov hluav taws xob thiab electronics industries. Insulator Teflon kuj yog zoo heev. Yog li ntawd nws yog heev feem ntau siv nyob rau hauv qhov siv thiab ua cables, Circuit Court laug cam, hluav taws xob Cheebtsam thiab thiaj li nyob. D.
• Nyob rau hauv cov tshuaj. Nyob rau hauv tas li ntawd mus rau lub prostheses thiab kev cog hniav ua los ntawm Teflon thawv rau khaws cia ntshiab thiab ntshav. Ua los ntawm nws thiab ntim rau cov tshuaj.
• Nyob rau hauv lub lag luam ua noj. Qhov no cov ntaub ntawv uas zoo heev suited, piv txwv li, tsim shafts rau dov ua khob noom cookie siv nyob rau hauv bakeries, mis nyuj dispensing twj tso kua mis, thiab lwm yam nyob rau hauv lub puab nto Teflon lauj kaub - .. Yog tseem ib hom ntawm fluoroplastic.
• Thaum assembling cov dej kav thiab phwj tshuab (FUM-daim kab xev).

Yog li, cov ntaub ntawv uas yog ib tug heev siab thov, thiab nyob rau hauv tej rooj plaub tsuas irreplaceable - Teflon. Cov yam ntxwv (nws applicability yog ua tau sab heev), muab rau cov qhua, peb xav txog hauv qab no.

kev sib txhuam coefficient

Qhov no xam yog nyob rau hauv PTFE yog heev me me. Cov kev tig tau thiab zoo li qub coefficient ntawm tsis sib haum xeeb nyob rau hauv steel nws tsuas yog 0,04. Txawm li cas los, raws li twb tau hais, PTFE - cov khoom yog tsis heev check. Yog li ntawd, txawm tias tom qab 100 kis tus deg zog sib txawv. Nyob rau hauv no zoo li qub coefficient ntawm tsis sib haum xeeb tsub kom mus txog 0,13, thiab tig tau - mus txog rau 0.08.

Undergoes irreversible hloov fluoropolymer nto thiab nyob heev zawv zawg ceev. Nyob rau hauv cov ntaub ntawv no, lub sib haum xeeb coefficient yog nce los ntawm 2-3 lub sij hawm. Tus nqi ntawm no Performance index tej zaum yuav txawv heev nrog kub hloov mus hloov los.

Polytetrafluoroethylene thiaj li coefficient ntawm tsis sib haum xeeb yuav, thaum lub load nce. Yog li, piv txwv li, thaum ib tug siab ntawm:

• 20-30 kg / m ^2, tus nqi ntawm no Performance index - 0.1;
• 150-300 kg / m ² - 0,02.

Cov khoom yog muag txaus - Teflon. Nws tus yam ntxwv yog zoo li no hais tias thaum siv rau kev tsim, piv txwv li, bearings, nws yog tsim nyog los ntxiv hmoov fillers. Qhov no tej zaum yuav coke, iav fibers, molybdenum disulfate, thiab hais txog. D.

kho qhov muag zog

Lub nyias films ntawm Teflon dawb do hau teeb, piv txwv li pob tshab. Nws zoo nkaus li zoo txog tib yam li polyethylene. Nyob rau hauv tuab films ntawm no cov ntaub ntawv uas yog illuminated.

Qhov taw qhia fluoroplastic transparency rau UV rays raws li ntau yam ntawm 2000-4000 A, rau infrared - wavelength xws li ntawm 2 mus rau 7,5 μ.

Raug siab kub

Thaum rhuab tshaj 327 degrees fluoroplastic nws muaju yuav raug rhuav tshem, uas nws kis tau mus rau hauv lub amorphous daim ntawv. Feem ntau tuab qhov chaw ua los ntawm cov khoom no yog opaque. Tom qab qhov kev hloov mus rau lub amorphous daim ntawv PTFE pib dawb do kis teeb. Nyob rau hauv cov ntaub ntawv no, cov ntaub ntawv uas tsis yog khov thiab mas elastic. Thaum rhuab mus 415 degrees C thiab saum toj no nws cov decomposition txheej txheem yuav pib. Qhov ntawd yog khov Teflon tsis tshwm sim thaum twg kub.

Qhov no muaj feem xyuam rau cov tsim txoj kev technology ntawm nws qhov chaw. Polyacetal (Standard specifications sij nrog lub siab tshaj plaws yog cov neeg) yuav siv tsis tau rau cov zauv los ntawm cov pa txoj kev rau yas. Piv txwv li, ib yam khoom manufactured therefrom los ntawm kev txhaj tshuaj molding los yog extrusion tsis yooj yim sua. Ua qhov chaw thiab cheebtsam ua los ntawm cov khoom no los ntawm sintering technology siv "ntsiav tshuaj" compacted thaum uas tsis muaj kub.

tshuaj zog

Fluoroplastic-4 yog ib tug sib ruaj khov substance. Qhov no cov ntaub ntawv uas tsis yaj txawm nyob rau hauv heev txhoj puab heev tshuaj - diluted thiab muaj zog acids. Tsis muaj ib yam ntxim rau nws thiab feeb meej alkaline daws teeb meem.

Qhov tshaj plaws xwb nws tsis ua siab ntev tiv tauj - yog kev daws teeb meem ntawm alkali hlau nyob rau hauv ammonia thiab elemental fluorine thiab tshuaj trifluoride. Nws manifests cov nyhuv ntawm cov tshuaj ntawm kom kub.

expansion piv

Nyob rau qhov no parameter Teflon F4 yam ntxwv kuj zoo kawg thiab. Txawm li cas los, nws coefficient ntawm expansion nws txawv nrog rau qhov kub thiab txias. Raws li nws yog qhia nyob rau hauv lub rooj.

recrystallization

Raws li twb tau hais, ib tug ntawm cov drawbacks muaj los ntawm PTFE (uas nws specifications yog feem ntau zoo), ib tug txaus siab degree ntawm txias txaus. Nyob rau hauv kev xyaum, qhov no los tau nyob rau hauv kev hloov rau hauv daim ntawv ntawm cov khoom ua therefrom nyob rau ntawm ib kom siab. Yog hais tias lawv yog siv thaum tsis siab dhau heev lawm kub - los ntawm 80 mus 100 degrees C, uas tus load yuav tsum tsis txhob yuav ntau tshaj 10 kg / m ^2. Thaum ib tug ntau dua siab rau cov khoom yuav nyob twj ywm pom deformation. Nrog ua kub yuav tsum tau txo kom tsawg thiab cov load.

Yog hais tias ib tug muaj zog siab (100-200 kg / m ²⁾ cov qauv ua los ntawm polytetrafluorethylene, yuav tsum tau crushed rau hauv ib lub phaj muaj zuj zus lawm thickness 3-5 lub sij hawm nyob rau hauv lub kub. Thaum deformation ntawm cov ntaub ntawv uas feem ntau tsis tshwm sim nws ntes thiab muaj tsis muaj lwm yam kev raug mob.

Nyob rau hauv lub rooj hauv qab no ib tug yuav pom zoo li cas yog nyob rau hauv no hwm fluoroplastic specifications (compression nyob rau hauv tej yam loads).

Fotoroplast yuav tsum muaj ntaub ntawv rau kev tsim qhov chaw siv, thiab ntau tshaj tshaj li 30 kg / m ² siab. Txawm li cas los, nyob rau hauv cov ntaub ntawv no kev tsim kho pairing cov ntshav nyob rau hauv cov khoom yuav tsum tau raws li tuab. Nws tsis yog tso cai rau muaj nyob rau hauv nws muaj kab noj hniav los yog tseem ceeb khoob. Nyob rau hauv cov ntaub ntawv no, lub fluoroplastic yuav tsuas muaj tsis pom qhov twg khiav. Teflon khoom - tsis dhau elastic. Yog li ntawd, nyob rau hauv thiaj li yuav ua tau ib tug snug haum, nws yog ntxiv nyob rau hauv zus tau tej cov roj hmab. Tej zaum hlws ris ntshav kuj siv tshwj xeeb caij nplooj ntoos hlav compensators.

Fluoroplastic: kev specifications

Nyob rau hauv zus tau tej cov PTFE-4 compulsorily complied nrog cov kev cai ntawm GOST 10007-80. Cov nram qab no cov lus qhia tau hais tias qhov tseem ceeb tshaj physico-tshuaj thaj chaw ntawm no cov ntaub ntawv uas.

Ntawm no yog xws li ib tug zoo kawg nkaus Teflon-4 specifications. Cov khoom ntawm no cov ntaub ntawv uas tso cai rau nws siv rau qhov siv thiab ua lub siab tshaj plaws zoo qhov chaw.

Hom PTFE-4

Raws li twb tau hais, polytetrafluoroethylene - lub feem ntau nrov hauv daim ntawv ntawm no hom ntawm polymers. Tam sim no ua ob peb hom PTFE-4:

• F-4PN. Siv rau qhov siv thiab ua siab ntseeg.
• 4D-F. Siv nyob rau hauv zus tau tej cov hom phiaj kev khoom.
• F-4D. Ntawm PTFE ua no hom nyias-walled raj, rwb thaiv tsev rau cables, hoses thiab FUM daim kab xev.
• F-4D. Heev manufacturable khoom siv rau qhov siv thiab ua pes tsawg loj.

Teflon ntawv

Cov khoom ntawm no hom yog heev npaum li cas nyob rau hauv coob nyob rau hauv niaj hnub kev lag luam. Zus tau tej cov insulating, anti-kev sib txhuam thiab sealing cov khoom no zoo heev polymer xws li Teflon, yam ntxwv. Nplooj version ntawm nws raug technology yog txwv kom muab zais rau hauv:

• cov ntaub ntawv uas tus cim "C" (Hlais);
• cim "P" (nias).

Muag khoom ntawm tej fluoroplastic yob tsis kauj. nws thickness no kuj txiav txim los ntawm lub xeev tus qauv thiab, nyob ntawm seb lub dav tej zaum yuav 2-4 hli.

Teflon, uas nws lub cev tus yam ntxwv yog zoo - niaj hnub khoom siv rau qhov siv thiab ua ib tug ntau yam ntawm qhov chaw thiab cheebtsam. Nyob rau hauv kev sib piv nrog cov pa yas nws muaj ib tug ntau ntawm cov zoo. Ob lub PTFE thiab cov khoom ntawd, nyob rau hauv view ntawm lub high school zoo uas yuav tsum tau, yuav tsum tau ua nyob rau hauv nruj raws li GOST.