Yuav Ua Li Cas Ntsuas PTFE Emulsion Zoo: 6 Core Indicators & Methods

PTFE emulsion - tseem hu ua PTFE dispersion - yog cov khoom siv raw rau txheej fiberglass ntaub los tsim PTFE high-temperature npuag , tapes, thiab siv. Yog tias qhov zoo ntawm emulsion tsis zoo, cov khoom kawg yuav muaj kev ua haujlwm tsis zoo, tsis sib xws, lossis ua tsis tiav ntxov.

Tab sis ua li cas koj thiaj paub yog tias ib pawg ntawm PTFE emulsion zoo? Koj sim nws.

Aokai PTFE tau siv thiab kuaj PTFE emulsions rau xyoo. Cov lus qhia no suav nrog rau 6 qhov kev ntsuas tseem ceeb - cov ntsiab lus khoom, pH, qhov loj me, viscosity, ruaj khov, thiab zoo li - nrog rau cov txheej txheem thiab kev lees paub.

Cov Ntsiab Lus Tseem Ceeb – Qhov Ntsuas Feem Ntau

Cov ntsiab lus ncaj qha cuam tshuam rau cov khoom lag luam thiab kev lag luam kev lag luam (cov txheej tuab dua yuav tsum muaj cov khib nyiab ntau dua).

Cov txheej txheem kuaj pom:

Kev lees txais cov qauv:

• Raws li tus qauv T / FSI 067-2021: Cov ntsiab lus ntawm cov khoom yuav tsum tau rov ua dua PTFE mloog zoo yog 60 ± 2%

• Qhov tseeb ntawm qhov chaw tswj tus qauv: 60 ± 0.5% (tighter kam rau ua rau txheej txheej)

Tus nqi pH – Stability Indicator

pH tus nqi cuam tshuam rau kev ruaj ntseg, corrosiveness, thiab compatibility nrog lwm yam ntaub ntawv.

Txoj kev kuaj: iav Electrode Method (Kev txiav txim ncaj qha) - ntsuas siv pH meter nrog iav electrode calibrated ntawm ob-point lossis peb-point calibration. Qhov no yog txoj kev siv ntau tshaj plaws.

Kev lees txais cov qauv:

• Ib T/FSI 067-2021: pH ntau 9.0 - 11.0

• Kev hloov pauv hauv pH feem ntau qhia tias muaj kev tsis ruaj khov lossis muaj tshuaj lom neeg tshwm sim (xws li hydrolysis ntawm surfactant)

• Kev taug qab mus ntev ntawm pH hloov pauv yog qhov tseem ceeb rau kev txiav txim siab tshuaj lom neeg ruaj khov ntawm emulsion

Vim li cas pH tseem ceeb: PTFE emulsions yog ruaj khov los ntawm fluorinated surfactants, uas yuav tsum tau alkaline tej yam kev mob (pH> 8) kom zoo. Yog tias pH poob qis dua 8, emulsion tuaj yeem coagulate.

Aokai PTFE pom zoo kom kuaj pH ntawm txhua lub nruas tuaj thiab txhua hli thaum khaws cia. Kev poob tam sim ntawd los ntawm 10.2 mus rau 8.5 tshaj ob lub lis piam qhia tias emulsion tsis ruaj khov thiab yuav tsum tau siv tam sim lossis tsis lees paub.

Particle Size & Particle Size Distribution

Qhov loj thiab kev faib tawm tsis sib xws ntawm PTFE thawj cov khoom muaj qhov txiav txim siab ntawm cov khoom tsim cov yeeb yaj kiab, permeability, thiab cov khoom siv kawg.

Cov txheej txheem kuaj:

Cov ntsuas ntsuas tseem ceeb:

• D50 (qhov nruab nrab txoj kab uas hla) - ntau yam rau PTFE emulsion: 0.1-0.3 microns

• Particle loj faib dav - nqaim yog zoo dua rau txheej txheej

• D10 thiab D90 - qhia txog kev sib kis ntawm kev faib khoom

Kev lees txais cov lus qhia: Rau feem ntau cov ntawv thov txheej, D50 yuav tsum nyob nruab nrab ntawm 0.15 thiab 0.25 μm nrog 90% ntawm cov khoom hauv ± 0.1 μm ntawm qhov nruab nrab.

Viscosity - Kev siv tau

Viscosity characterizes tus cwj pwm ntws, ncaj qha cuam tshuam rau txheej txheej thiab impregnation txheej txheem.

Cov txheej txheem ntsuas ntau:

Kev lees txais cov qauv:

• Ib T / FSI 067-2021: Viscosity ntau 12.0 - 30.0 mPa·s (ntawm 25 ± 1 ° C)

• viscosity uas tsawg dhau → txheej tsis sib xws, drips

• Viscosity siab dhau → tsis zoo nkag mus rau hauv fiberglass, yuav tsum tau dilution

Daim ntawv qhia tswv yim: Rau dip txheej ntawm fiberglass ntaub, lub hom phiaj viscosity yog feem ntau 15-20 mPa·s. Yog tias viscosity drifts, kho nrog dej deionized (kom qis) lossis ntxiv cov thickener (kom nce).

Kev Ntsuam Xyuas Kev Ruaj Ntseg - Kev Cia Siab & Kev Thauj Mus Los

Kev ntsuas kev ruaj ntseg ua kom cov emulsion tseem tsis sib xws thaum khaws cia thiab kev thauj mus los. Kev ntsuas nrawm yog siv los simulate mus ntev.

Cov txheej txheem hla / tsis ua haujlwm:

• Tsis pom delamination, sedimentation, lossis gel tsim

• Viscosity hloov <10% los ntawm thawj zaug

• Particle loj D50 hloov <15%

Kev taw qhia lub neej txee: Raws li kev khaws cia (10-30 ° C, kaw), PTFE emulsion feem ntau tswj kev ruaj ntseg rau 6-12 lub hlis. Yog tias qhov ntsuas centrifuged pom> 5% sediment, muab pov tseg.

Kev tshuaj xyuas qhov tshwm sim - Kev kuaj xyuas sai sai

Visually soj ntsuam tus qauv nyob rau hauv lub teeb ntuj.

Kev pom zoo: Dawb los yog lub teeb daj emulsion, tsis sib xws, tsis muaj qhov txawv txav xws li delamination, gel lumps, daim tawv nqaij tsim, lossis pom tseeb los nag.

Saib rau dab tsi:

• Darkening → tuaj yeem paug lossis thermal degradation

• Cov tawv nqaij ntawm qhov chaw → ziab lossis ib nrab coagulation

• Lumps lossis grit → coagulated polymer (phem)

• Cov kua ntshiab rau saum → sedimentation tau tshwm sim

Summary – Xaiv cov kev xeem raws li daim ntawv thov

Cov ntaub ntawv saum toj no yog muab los ntawm Jiangsu Aokai Tshiab Materials Technology Co., Ltd.

Yog tias koj xav paub ntau ntxiv txog cov ncauj lus kom ntxaws, daim ntawv thov scenarios, thiab cov kev daws teeb meem rau peb cov khoom lag luam tag nrho, suav nrog Teflon high-temperature ntaub, Teflon high-temperature tape, Teflon high-temperature mesh bets, seamless fusing machine bets, single-sided PTFE fabric, high-temperature resistant, high-temperature resistant, high-temperature resistant, high-temperature resistant . thov hu rau peb ntawm txoj kev hauv qab no:

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Peb ib txwm txhawb nqa lub tswv yim kev tshaj lij thiab kev pabcuam siab dawb, thiab ua siab dawb muab rau koj nrog kev daws teeb meem ib zaug thiab kev pabcuam zoo!