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Kunyumba » Nkhani » PTFE Adhesive Tepi » Kodi kukana kukwawa komanso kukhazikika kwanthawi yayitali kwa tepi yotentha kwambiri ya Teflon kungasinthidwe bwanji?

Kodi kukana kukwawa komanso kukhazikika kwanthawi yayitali kwa tepi yotentha kwambiri ya Teflon kungasinthidwe bwanji?

Mawonedwe: 0     Wolemba: Mkonzi Watsamba Nthawi Yosindikiza: 2026-07-14 Poyambira: Tsamba

Funsani

I.MolecularNetworkTopologyKukometsera kwaSiliconeZomatiraLayer-Kupititsa patsogoloBulkCreepResistance

1.HighMQResin/SiliconeRubberRationdi'Hard-Core'Structure

Opanga adoptsMQsiliconeresinasthecoretackifierandreinforcingagent,kuchulukitsaMQ/gumratioto1.2:1–2:1(zapamwamba kwambiri kuposa magiredi anthawi zonse). olimba'gawo lolimba'magawo ang'onoang'ono okhala ndi chiwiya chapamutu, chomwe chimakakamiza kusuntha kwamagulu a siloxane unyolo ndikusintha kwambiri posungiramodulusa ndi kukana kukana kutentha.

PTFE tepi wokutidwa pa mipope mankhwala ndi chombo flanges.png

2.Kuphatikizika kwaMagulu Olimba Osamva Kutentha ndiMagawo Olumikizirana Mabondi Apamwamba

Phenyl, diphenyl, orcarboranemagulu amalowetsedwa kuthepolydimethylsiloxanemsana (monga 20-30mol% phenylcontent) kulepheretsa unyolo wamafuta kusuntha komanso kusinthasintha kwagalasi kutentha ndi rmaldecompositiontemperature.Thecrosslinkingsystempreferentiallyemploysaddition-curehydrosilylation(Pt-catalyzed),forming-C-C-or-Si-C-crosslinkingbridgeswithsuperiorthermalstability.

Mwa kusintha mwatsatanetsatane zomwe zimagwira hydrogencontent ndi unyolo wahydrogen-containingsiliconeoil, pafupifupi pafupifupi 5,000–15,000g/mol) zakwaniritsidwa, kuonetsetsa kuti ntchito imakhalabe ndi mphamvu zambiri kapena kutentha kwanthawi yayitali.Zowonjezera pambuyo-kuchiritsa kapena kutentha kwambiri komanso zimagwiritsiridwa ntchito kuti ziwononge gulu lotsalira logwira ntchito komanso zimachepetsa mpumulo wobwera chifukwa cha zolakwika zaukonde.

II.GradientModulusMultilayerAdhesiveStructure-BancingTackandCreepResistance

'Primer-anchoringlayer+High-moduluscohesivelayer+Viscoelasticfunctionallayer' atatu-layerdesign

1.Primer-anchoringlayer(1–3μm): Gwiritsani ntchitosasilanecouplingagent yokhala ndimagulu apoxyoracryloyloxy, pre-polymerized ndiMQresin, kupereka zonsezomakemikolo kuPTFE substrate ndico-crosslinking nditheuppersiliconelayer.

2.High-moduluscohesivelayer(mainbody, approx.30–50μm): Useshigh-MQ-ratio,high-phenyl-content,high-crosslink-densitysiliconeadhesivetofurnisharobustshear-resistantskeleton.

3.Viscoelasticfunctionallayer(incontact with theheadhend,3–8μm): Employslow-MQ-ratioorhydroxy-terminatedsilicone-oil-modifiedsoftsiliconeadhesivetolowersurfacemodulusandensurerapidwettingandconformabilitykwamutu uku ndi kutentha kwa televizioni.

Zosanjikiza zitatu za PTFE tepi structure.png

III.NanofillersforConstructingPhysicalCrossslinkingandHeat-ResistantSkeleton

1.In-SituReinforcementandSurfaceModificationofNano-Silica

Themanusesfumedsilica(madera apaderadera200–380m²/g),opangidwa pamwamba ndivinyltriethoxysilaneorhexamethyldisilazane,ataloadingof10–25wt%.Thenano-SiO₂imapangamahydrogenbondndiphysicaladsorption ndisiloxaneunyolo reversible physicalcrosslinkingnetwork yomwe imataya mphamvu komanso imalepheretsa unyolo wa molekyulu kupyola kutentha.Kubalalika kwakukulu kumatsimikizira kuti silika 'magulu' okhala ndi glomeratesizes pansi pa 100nm, kupewa kukhazikika.

2.DirectionalCreepResistancevia2DNanomaterials

Zowonjezera1-5wt% zochepa-sanjika zaineororgano-modifiednano-montmorillonite,zomwe zimatsogoleranalayeredapangapangakupyolera-kumeta-kupangitsa kupangika pakudya,mawonekedwe'mazeeffect'paralleltothetapep kanjira,kuchulukirachulukira kukaniza kusuntha kwa mamolekyulu kumayendedwe akumemererako.

IV.ChemicallyIntegratedSubstrate–AdhesiveInterfaceandProcessControl

1.SurfaceActivationndiBifunctionalPrimerforChemicalBonding

ThePTFE pamwamba imathandizidwa koyamba ndithasodium-naphthalene–THFsolutionorlow-pressureargon/oxygenplasmatogenerateanactivated layer yokhala ndi carboxylandhydroxylgroups ated.Mmodzi mwa omalizawo amakumana ndi–OH/–COOHonthePTFE pamwamba, pomwe ena amatenga nawo gawo mukusakaniza kwamadzimadzi kapena kutsika kolumikizana ndi zomatira zomatira, kupanga makina abondnetwork yomwe imalowa pachimake. Njirayi imatha kuwonjezera mphamvu yogwira kutentha kwambiri (by360°C).

PTFE film tape.webp

2.RampedCuringndiPost-ThandizoKuchotsa Zowonongeka

Mbiri yochiritsika imagwiritsidwa ntchito:poyamba, zosungunulira zimayendetsedwa ndi zomatira zamtundu wa 80-100°C; kenaka hydrosilylation ndi kulongedza kwaMQresina zimamaliza pa 150-170°C; pomaliza, positi -kuchira kutha kufika pa200–220°Ckwamaola angapokuchotsanimkatindikukhazikikamomalo olumikizirana thupi.Kuzizirako pang'onopang'ono kumapewa kusweka kwapang'onopang'ono chifukwa chosiyana kutha kwamafuta.

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