Sib npaug Thermal Conductivity thiab Adhesion hauv PTFE High-Temperature Adhesive Tapes

Thaum PTFE daim kab xev yuav tsum tau dissipate tshav kub - piv txwv li, sib txuas lub hwj chim tivthaiv rau lub tshav kub dab dej - cov nplaum txheej yuav tsum ua ob yam ib zaug: hloov tshav kub thiab tuav nruj. Ntxiv thermally conductive fillers (alumina, boron nitride, thiab lwm yam) txhim kho thermal conductivity tab sis yuav luag ib txwm txo qhov adhesion.

Qhov kev sib tw yog kom ua kom lub tshav kub hloov pauv thaum poob me ntsis stickiness li sai tau . Cov lus teb yog nyob rau hauv peb qhov chaw muab tub lim: particle size, particle shape, and loading percentage.

Aokai PTFE tau tsim thermally conductive PTFE tapes rau electronics thiab industrial daim ntaub ntawv. Kab lus no piav qhia txog qhov loj me me, morphology, thiab kev thauj khoom cuam tshuam li cas rau kev lag luam tawm, thiab yuav ua li cas tsim kom muaj qhov sib npaug zoo tshaj.

Particle Size - Qhov Zoo-Coarse Trade-Off

Particle loj tswj tau zoo npaum li cas fillers tsim ib lub tshav kub-ua network thiab zoo npaum li cas cov nplaum ntub dej ntawm qhov sib txuas.

1. Fine particles (nano rau submicron)

• Cov nyhuv thermal: Qhov chaw siab ua rau cov ntsiab lus sib txuas ntau dua, tab sis kuj muaj ntau qhov sib cuam tshuam thermal tsis kam (phonon scattering). Qhov hnyav agglomeration txwv kev txhim kho conductivity.

• Adhesion effect: Cov khoom zoo nqus cov khoom siv ntau thiab cov tackifiers, hardening cov nplaum. Initial tack poob sharply. Flowability txo, txo cov ntub dej ntawm qhov chaw qis-zog PTFE substrates → tsis tshua muaj zog tev.

• Kev txiav txim: Tsis tshua muaj siv ib leeg. Ultra-fine fillers muab marginal thermal nce tab sis rhuav tshem adhesion.

2. Coarse hais (micron txog kaum microns)

• Cov nyhuv Thermal: Tsawg dua cov ntsiab lus sib cuag tab sis ntev dua ib tus neeg ua kom sov txoj hauv kev. Thaum sib txuas ua ke raws li cov nplaum tuab cov kev taw qhia, lawv muab qhov zoo ntawm lub dav hlau conductivity.

• Adhesion nyhuv: Tsawg ntog adsorbs tsawg resin, khaws cia nplaum softness. Txawm li cas los xij, yog tias cov khoom yog tuab li lossis tuab dua li cov nplaum nplaum (feem ntau 25-100 μm), lawv ua rau cov kab xev nplaum, txo qhov sib txuas zoo, thiab tsim cov ntsiab lus kev ntxhov siab.

• Kev Txiav Txim Siab: Siv los ua cov pob txha taub hau, tab sis yuav tsum muaj qhov loj me hauv qab cov nplaum tuab.

3. Cov tshuaj - bimodal blending

Sib tov coarse thiab nplua hais nyob rau hauv ib qho piv txwv. Cov nplej zoo sau cov voids ntawm coarse hais, ua tiav cov ntim ze tshaj plaws. Nrog rau tib lub chaw muab tub lim tag nrho, kev muab qhab nia bimodal nce cov ntsiab lus sib cuag (zoo dua conductivity) lossis, hloov pauv, ncav cuag lub hom phiaj conductivity nrog tsawg dua tag nrho cov muab tub lim , tawm hauv cov txheej txheem txuas ntxiv kom khaws adhesion.

Aokai PTFE kev pom zoo : Rau 50 μm tuab nplaum txheej, siv coarse hais ntawm 20-30 μm sib xyaw nrog cov khoom zoo ntawm 1-5 μm. Txoj hauv kev bimodal no yog tus yuam sij rau kev ntsuas cov khoom.

Particle Morphology - Cov duab tseem ceeb heev

Non-spherical fillers dlhos lub sij hawm txheej thiab ziab, cuam tshuam los ntawm-dav hlau (Z-direction) thermal conductivity thiab adhesion.

1. Spherical lossis quasi-spherical fillers (piv txwv li, spherical alumina)

• Thermal nyhuv: Isotropic. Cov khoom sib dhos yooj yim raws li cov kev taw qhia tuab, zoo rau kev sib tsoo ntawm lub dav hlau.

• Adhesion effect: Cov npoo du tsis cuam tshuam cov dej ntws. Preserves txias-flow thiab nto ntub dej. Ntawm tag nrho cov duab ntawm qhov sib npaug ntawm kev thauj khoom, spheres khaws qhov zoo tshaj plaws adhesion - tshwj xeeb tshaj yog pib tack.

• Qhov txiaj ntsig sib npaug: Qhov zoo tshaj plaws tag nrho compatibility. Maximizes Z-axis thermal nce nrog tsawg adhesion poob.

2. Flaky fillers (xws li, boron nitride, graphene)

• Cov nyhuv thermal: Qhov sib piv siab muab qhov zoo tshaj plaws nyob rau hauv dav hlau conductivity, tab sis flakes sib npaug mus rau lub substrate, muab me ntsis los ntawm-dav hlau kev txhim kho - tsis zoo rau PTFE tapes uas xav tau ntsug cua sov hloov.

• Cov nyhuv Adhesion: Flakes ua zoo li cov yeeb yaj kiab muab faib, thaiv cov yas ntws thiab ua rau txiav thawj zaug. Cov npoo ntse ua rau muaj kev ntxhov siab, txo tev lub zog.

• Qhov tsis zoo ntawm qhov sib npaug: Tsis zoo haum rau Z-kev taw qhia thermal xav tau, ua rau muaj kev cuam tshuam loj heev hauv qhov nplaum. Tsis pom zoo ua lub ntsiab muab tub lim.

3. Fibrous los yog irregular fillers

• Cov nyhuv Thermal: Qhov sib piv siab tuaj yeem tsim cov kev sib txuas sib txuas ntawm qhov chaw thau khoom tsawg.

• Adhesion effect: Ua kom cov nplaum viscosity nce, khov PSA los ntawm kev sib cuam tshuam, thiab rhuav tshem tackiness. Cov npoo ntse puas ua rau cov nplaum-PTFE interface.

• Kev txiav txim: Tsis tshua muaj siv los ua lub ntsiab muab tub lim; tsuas yog me me ntxiv raws li cov khoom siv txuas ntxiv.

Filler Loading - Nrhiav Percolation Sweet Spot

Raws li kev thauj khoom thauj khoom nce ntxiv, thermal conductivity nce maj mam thaum xub thawj, ces dhia nrawm ntawm qhov pib percolation , ces toj siab. Adhesion, txawm li cas los xij, tsis tu ncua.

1. Tsawg loading (<30 vol%)

Fillers yog cov Islands tuaj nyob hauv ib qho kev sib txuas txuas ntxiv. Thermal conductivity NW nyuam qhuav txhim kho. Adhesion tseem nyob ze rau PSA ntshiab. Qhov chaw nyab xeeb rau khaws cia tack, tab sis thermal nce negligible.

2. Nruab nrab-rau-siab loading (30-60 vol%) - lub qhov rais tseem ceeb

Particles pib kov thiab tsim txoj hauv kev conductive. Thermal conductivity nce exponentially. Lub caij no, lub nruam resin matrix ua fragmented. Adhesive hloov nkig; pib tack thiab tev lub zog poob sharply.

Qhov no yog thaj chaw optimization. Lub hom phiaj yog ua haujlwm nyob rau hauv qis kawg ntawm qhov pib percolation - siab txaus kom ua tau raws li thermal specs, tsawg txaus kom khaws tau cov theem txuas ntxiv mus rau qhov ua tau zoo.

3. Ultra-siab loading (> 60 vol%)

Cov khoom ntim ntom ntom ua rau cov thermal nce ntxiv (plateau). Resin tsis tuaj yeem sau tag nrho qhov khoob; voids daim ntawv. Adhesive yuav qhuav, nkig, thiab yuav luag tsis-tacky. Daim kab xev ua ib qho yooj yim thermal zaj duab xis. Cov khoom tshuav yog poob tag nrho.

Daim ntawv tshwj xeeb rau PTFE daim kab xev (silicone PSA): Silicone muaj qis zog cohesion thiab tsis zoo muab tub lim compatibility tshaj acrylic. Nws zam qhov siab tshaj plaws muab tub lim loading. Over-filling ua rau adhesive pulverization.

Aokai PTFE empirical cov ntaub ntawv : Rau spherical alumina nyob rau hauv silicone PSA, lub percolation pib yog roughly 35-45 vol%. Qhov txiaj ntsig zoo tshaj plaws yog ua tiav nyob ib puag ncig 40-45 vol% nrog bimodal faib. Tshaj 55 vol%, adhesion ua tsis tau rau feem ntau daim ntawv thov.

Summary - Qhov Peb-hauv-ib Qhov Ntsuas Cov Qauv

Yuav kom ua tiav cov thermal conduction-adhesion tshuav nyiaj li cas hauv PTFE high-temperature adhesive tapes:

1. Siv spherical coarse hais (20-30 μm) raws li cov pob txha conductive thawj - lawv muab los ntawm lub dav hlau conductivity nrog tsawg adhesion poob.

2. Ntxiv cov khoom zoo (1-5 μm) los tsim ib qho kev faib tawm bimodal - sau cov voids, txo tag nrho cov muab tub lim xav tau, khaws cia cov khoom siv matrix.

3. Khaws tag nrho cov muab tub lim thauj khoom ntawm qhov qis-nruab nrab ntawm qhov pib percolation (ze li 40-45 vol% rau spherical alumina hauv silicone PSA).

4. Txwv tsis pub flaky los yog fibrous fillers rau <5 wt% yog tias xav tau txhua - lawv ua mob tack thiab muab cov txiaj ntsig me me los ntawm dav hlau.

Qhov tshwm sim: Ib daim kab xev thermally conductive PSA uas tau lo thiab kav ntev.

Aokai PTFE manufactures thermally conductive PTFE tapes siv no bimodal spherical muab tub lim tswv yim. Peb tuaj yeem tsim cov thermal conductivity thiab adhesion qib rau koj daim ntawv thov.

Thaum kawg Takeaway

Txhim kho thermal conductivity nyob rau hauv PTFE nplaum tapes ib txwm tiv thaiv adhesion. Qhov kev sib haum xeeb zoo tshaj plaws yog los ntawm cov khoom kheej kheej + bimodal loj faib + thauj khoom dhau los ntawm percolation . Tsis txhob flakes thiab fibers tshwj tsis yog tias koj daim ntawv thov tshwj xeeb xav tau nyob rau hauv lub dav hlau conductivity thiab tuaj yeem zam qhov qis tack.

Rau kev sib raug zoo nrog cov cua kub dissipation, thermally conductive PTFE daim kab xev yog cov pov thawj tov. Hu rau Aokai PTFE rau cov qauv tsim raws li koj qhov xav tau thermal thiab tev.

Cov ntsiab lus technical muab los ntawm Jiangsu Aokai Tshiab Materials Technology Co., Ltd.

Rau cov ncauj lus kom ntxaws specifications thiab kev cai daws teeb meem rau PTFE high-temperature fabrics, tapes, mesh siv, thiab ntau dua:

• Mr. Guo: +86 18944819998

• Mr. Liu: +86 13705266308

Ua raws li kev tshaj lij thiab kev ncaj ncees, peb muab ib qho kev daws teeb meem thiab kev xav zoo tom qab muag.