Ile »
Iroyin »
PTFE alemora teepu ?
Bawo ni o le microporous be oniru ti breathable Teflon ga-otutu teepu iwontunwonsi air permeability pẹlu idabobo ati ti kii-stick-ini
Bawo ni o le microporous be oniru ti breathable Teflon ga-otutu teepu iwontunwonsi air permeability pẹlu idabobo ati ti kii-stick-ini?
JiangsuTeflon Giga-TemperatureClothManufacturer–JiangsuAokaiNewMaterialTechnologyCo.,Ltd.leti pe eyi nsesentiallyamatterofsynergylaarinporousstructureati oju-ile/bulkfunctionalproperties.
1.Orisun RogbodiyanNinu Igbekale MicroporousAti Awọn ohun-ini Airpermeability nilo awọn ọna asopọ laarin awọn pores,pẹlu gaasi ti o kọja nipasẹ awọn ikanni ọna.
Idabobo(agbara dielectric) reliesonthematerial'sdensity.Ifihan microporesisequivalenttomixingair(pẹlu alow didenukole aaye agbara ~3kV/mm) sinu PTFEmatrix,atipenporesprovidepotential ipa ọna fun ipinsiyeleyele aticreepagetracking.Thehighertheporosityand thestraightertheratherthroughthrough-forbreaking
Airpermeabilityvs.non-stickproperty: Ohun-ini ti kii-stick ti ipilẹṣẹ lati inu PTFE'sextremelylowsurfaceenergy(~18mN/m)ati oju didan.Microporesinmu oju oju oju oju oju ati oju-ọna ojulowo ati olubasọrọ gidi; didà ohun elosorviscousmedia le ṣii etratethemicropores, lara 'mechanicalinterlocking'thatinsteadcausesadhesion.Nitorina, thematerialmustsi nigbakanna ni aṣeyọri iṣẹ-ṣiṣe afẹfẹ ati dada atako lati wetting ati wiwọ.
2.CoreApproachtoBalancedDesign:SynergisticModulationofMesoscopicStructuralParameters Thekeytobalance is nottaraficingone Property for another,buttrathercoordinatelytuningporesize,porosity,poregradient,tortuosity,and Surface itọju lati ni itẹlọrun gbogbo igba nigbakanna.
2.1ṢakosoApapọIwọnIwọn ilawọn (0.1–2μm) ati Iwadi IpinpinPoreIwọn: Nigbati o ba jẹ pe o jẹ ohun ti o jẹ elekitironi tumọ si ọna ọfẹ ati awọn ipilẹṣẹ ti o wa fun ifasilẹ apakan, didenukole ninu awọn airgaps ti o tẹle ofin Paschen; sibẹsibẹ, awọn micropores ti o ga julọ (submicr) onscale) le ṣe pataki pọ si didenukole foliteji. Awọn ẹkọ fihan niwọn igba ti apapọ porediameter wa ni isalẹ0.5μm, DCbreakdownstrengthofa50-μm-nipọnPTFEfiimucanstillreachabove40kV/mm.
Iṣe-aiṣedeede: Nigbati a ba ṣe iwọn diẹ sii ju awọn itọsi alumọni ṣe ipinnu nipasẹ awọn molecularchainradiusofgyrationorthemeltviscosity ofhot-meltadhesives(fun apẹẹrẹ, PE,PP), akori ko le fi awọn micropores. edPTFEfibrilson ti oju-ilẹ, ti o yorisi ni ikankan pupọpupọ mallactualcontactarea, oorun-stickproperty ko ni ipa.Ni gbogbogbo, oju-oju-ara ti o mallerthan0.5μm ti o munadoko ṣe idena awọn ilawọle nipasẹ awọn ohun-ini gbigbona-meltadhesives.
2.2IṣakosoPorosityinaIwọn Iwọnwọn(50%–70%)
Toolowporosity (<30%) ko le pese adaṣe alairpermeability; ga ju (> 80%) dinku akoonu ti o lagbara pupọ, ti o fa idibajẹ ni imudara ati awọn ohun-ini ẹrọ. Ataporosityaround60%, theairpermeability (Gurleyvalue) le ṣe iṣakoso laarin 20–100s/100cc,whilefilm0.13mmthick le ṣe itọju agbara agbara agbara ti 2kV, ipade awọn ibeere imuduro igbona pupọ julọ.
Awọn ' node-fibril 'structureofePTFE ti o wa ni ọna ti o ga julọ (τ≈2.54) .Gases gbọdọ kọja nipasẹ awọn ọna ti o tobi ju, eyi ti o jẹ ki afẹfẹ didenukole ipa ọna ti o ni ipaniyan awọn ilana ti taara-nipasẹ awọn ikanni ti o gba agbara. Hightortuositya ṣe itusilẹ igbẹkẹle ti iṣẹ-iṣe deede lori ifarabalẹ lati isọpọ-ara-ara si aweakerone, gbigba imole ti o tobi porestobeusedinepapada fun isọdọtun giga.
Nipasẹ iwọn otutu, iwọn otutu-igba kukuru, tabi asoṣọ pẹlu ultra-thinfluoropolymer (fun apẹẹrẹ, TeflonAF), oju-ọna oju-ọna pẹlu ohun iṣẹ ṣiṣe ti o gba oju-aye similartoadensefilm. Thebulkretainsa Highlyporous breathablelayer: Labẹ awọn awọ ara, awọn ohun elo ti si tun ntọju awọn gigalyporous nẹtiwọki iṣẹ ti sopọ micropores.Gascan wa ni tan kaakiri ita ati ki o gunitudinally nipasẹthgesorthroughresidualnano-sized poresintheskin,miduro overallairpermeability.
Ipa: Idabobo jẹ gaba lori nipasẹthedenselayer, ti kii-stickperformance ni idaniloju nipasẹthedenselayer’sextremelylowsurfaceenergyandultra-finepores,ati ailpermeabilityreliesoninterlayerdiffus ionandedge convection.Nigbati o ba lo awọn ẹrọ ifidimu ooru,tape oju ko ni fi ara mọ fiimu ti molten, lakoko ti o wa ati awọn iyipada ti o le jade nipasẹ etisofthemicroporouslayer.
2.5Itọju-Idaju Lẹhin-Itọju: Super-Oleophobic/HydrophobicIyipadaLaisiPoreBlockage Nipaplasmagraftingoffluorinatedmonomersorvapordepositionofanextremelythin(<50nm)perfluorinatedlayer,acoatingwiththevenlowersurfaceeenergy mayformedontheinnerwallsofthemicropores.Eyi ṣe idilọwọ awọn ohun elo tutubysticky laisi didi awọn ikanni ikanni. Itọju yii funni ni oju-oju pẹlu 'micro/nanodual-phobicity,' iṣagbega ti kii-stick-ini si ile-ile, pẹlu o fẹrẹẹ gaanlosinairpermeability.
3.TypicalPerformanceIndicatorsforaBalancedDesign
Gbigba apẹrẹ ti a ṣe apẹrẹ ti a ṣe simi PTFEtape(0.13mm nipọn) apẹẹrẹ:
Paramita
Iye
Agbara afẹfẹ (Gurley)
30-60 s / 100 cc - pade awọn ibeere fun eefi-ididi ooru, lamination igbale, bbl
Foliteji didenukole
≥3 kV (DC) - o dara fun ipinya idabobo foliteji kekere-si-alabọde
Dada agbara peeli ti kii ṣe igi (lodi si alemora akiriliki, alemora yo gbona EVA)
<0.1 N/cm - ko si aloku lẹhin igba pipẹ lilo iwọn otutu giga
Idaabobo iwọn otutu
Lilo tẹsiwaju lati -70°C si 260°C
4.Ipari
Iwontunwonsi ti igbekalẹ microporous ninu mimu Teflon-giga-iwọn otutu ti a ṣe aṣeyọri nipasẹ imọ-ẹrọ imọ-jinlẹ , pinpin awọn ohun-ini mẹta kọja awọn ipele igbekalẹ oriṣiriṣi:
Idabobo ati ti kii-stickperformance ti pese nipasẹ awọn isunmọtosi-surfacedenseskinorultra-finemikropores;
Airpermeability ti wa ni ọwọ nipasẹ ti abẹnu asopọ, tortuousmacroporous nẹtiwọki. Niwọn igba ti oju-oju ti n ṣalaye ni iṣakoso nipasẹ awọn ohun-ọja ti o wa ni agbegbe, ipa ti inu ati agbara ti o wa ni pipe ni idapo pẹlu awọn ẹya ara ẹrọ ti o dara, tape le ni igbakanna lati ṣaṣeyọri rere permeability, idabobo, ati ti kii-sticperformanceacrossawiderangeof awọn alaye pato.
