A wide-temperature-range PTFE tepi inofanira kubatana yakavimbika pa -70°C (kana kudzika) uye irarame nekuratidzwa nguva dzose pa200-260°C - imwe nguva inopfuura 300°C. Izvi zvinoda inonamira sisitimu inoramba ichichinjika pasina kutadza kwakabatana kana kupindirana kwehukama kune chero kunyanyisa.
Iyo inonamira layer ndeye yakakosha silicone pressure-sensitive adhesive (PSA) yakavharidzirwa pamusoro-yakagadziridzwa PTFE mafirimu kana PTFE-impregnated fiberglass jira. Kiyi yekuita kwakadzikama pahwindo rakafara retembiricha riri mukugadzira adaptive network - dhizaini inoyera kudzika-tembiricha wetting, yakakwirira-tembiricha inokambaira, uye kupisa kushivirira kushivirira.
Aokai PTFE yakagadzira matepi ekupisa ePTFE ichishandisa misimboti inotsanangurwa pazasi. Ichi chinyorwa chinotsanangura zvinhu zvina zvakakosha dhizaini: shanduko dhizaini chimiro, gungwa-chitsuwa biphasic microstructure, gradient crosslinking, uye kupisa-yakagadzika composite mafirita.
Transition Layer Structure pakati pe Substrate uye Adhesive Layer
1. Dambudziko guru - PTFE pamusoro pesimba
PTFE inoratidzira yakanyanya kuderera pamusoro pesimba (18-20 dynes/cm). Kunama kwakananga kwekunamira kunowanzo svuuka panguva yekudziya bhasikoro nekuda kwekusawirirana kwemafuta ekuwedzera coefficients - PTFE inowedzera 30-40x kupfuura fiberglass.
2. Surface activation uye primer anchoring
Kugadzirisa izvi, iyo PTFE pamusoro inopinda makemikari etching ne sodium-naphthalene complexes kana kurapwa kweplasma kuunza C = C mabhondi maviri uye mapoka epolar ane oxygen. Mushure mezvo, yakanyanya kutetepa yakatsaurirwa silicone primer (semuenzaniso, vinyl-ine silane coupling agent) inozoiswa kuumba 'molecular bhiriji' painterface kuburikidza nemakemikari bonding.
3. Stress-buffering interlayer
Mune mamwe magadzirirwo, yakaderera-modulus, yakakwira-ductility elastic intermediate layer (gel-like silicone ine flexible segments) inoiswa pakati peiyo activated layer uye main adhesive layer. Izvi zvinotora interfacial kushushikana kunokonzerwa nekupinza tembiricha kuchinjika uye kunodzivirira kukwidziridzwa kwekunamira.
Gungwa-Island Biphasic Microstructure Regulation
Iyo huru yekunamatira matrix ndeye yakasarudzika PSA sisitimu inosanganisira MQ silicone resin (yakapararira chitsuwa chikamu) uye yakakwira-molecular-uremu polysiloxane (inoenderera yegungwa chikamu).
1. MQ silicone resin - yakaoma chitsuwa chikamu
Inopa kubatana, kubata simba, uye yakakwirira-tembiricha inokambaira kuramba. Kunyatso kudzora kwayo M/Q molar ratio (kazhinji 0.6-0.9) uye particle size dispersion inovimbisa yunifomu embedding mukati mechikamu chinoramba ichigadzira nzvimbo dzemuviri dzinoyambuka.
2. Polysiloxane inopfuurira chikamu - nyoro yegungwa chikamu
Inoburitsa nekukurumidza tack, yakaderera-tembiricha kunyorova, uye kuchinjika. High-molecular-weight methyl vinyl silicone rubber kana methyl phenyl vinyl silicone rabha inowanzosarudzwa.
3. Special optimization kune yakafara tembiricha renji
Chikamu chiduku chepamusoro-phenyl-content siloxane zvikamu zvinosanganiswa. Phenyl mapoka anodzvanyirira kudzika-tembiricha crystallization yepolydimethylsiloxane, ichidzikisa tembiricha yekunamira pazasi -100°C. Zvichakadaro, mapoka ephenyl anowedzera kupisa-oxidative degradation kuramba patembiricha yakakwira, zvichiita kuti chikamu chegungwa chirambe chichichengetedza kukwirira kwepamusoro pahwindo retembiricha.
Multi-Layer kana Gradient Crosslinking Dhizaini yeThermal Shock Resistance
Iyo kaviri-layer yekuvhara maitiro inogamuchirwa kuenzanisa yakakwirira-tembiricha creep kuramba uye yakaderera-tembiricha tackiness:
1. Inner layer (substrate side)
Zvine mwero high crosslink density , kuendesa yakasimba-yepamusoro-tembiricha inobata simba uye yakabatana simba sechinhu chinodzivirira shear.
2. Outer layer (bonding surface)
Ultra-yakaderera crosslink density ine yakanyanya mobile molecular cheni, kuve nechokwadi chekukurumidza kunyorova pane anonamatira pane yakaderera tembiricha uye yakakwana yekutanga tack.
Neimwe nzira, inoenderera gradient ye crosslink density kubva mukati kuenda kunze divi inoumbwa mukati mechikamu chimwe chete kuburikidza nekurapa maitiro, isina musono kubatanidza dzakaomarara uye dzinochinjika dzinoshanda nzvimbo.
Aokai PTFE inoshandisa gradient crosslinking tekinoroji kuti ive nechokwadi chekuti tepi inoramba ichichinjika pa -70 ° C (inogonesa tack yekutanga uye conformability) ichichengetedza simba rakabatana pa260 ° C (kudzivirira kukambaira uye kunamira kuchinjisa).
Kupisa-Yakagadzikana Composite Fillers
Nano-scale fumed silica yakaparadzirwa zvakatsetseka mune inonamira matrix yekusimbisa, yakasanganiswa nemapoka maviri eanoshanda mafirita:
1. Zvinopisa zvinodzivirira kupisa
Cerium oxide, iron oxide, uye mamwe ma radical scavengers anodzivisa oxidative kuomarara kwe siloxane parutivi maketani uye kuderera kwemusana mukupisa kwakanyanya. Aya ma antioxidants anowedzera hupenyu hwesevhisi pa260°C.
2. Thermal conductive fillers
Micron-sized aluminium nitride, alumina , nezvimwewo, inokurumidza kubvisa kupisa kuderedza kuunganidza kwemukati uye kuderedza kuchembera. Izvi zvinonyanya kukosha kune zvikumbiro apo tepi inoshandiswa sechinhu chinopisa chinopisa kana uko kupisa kwekuvaka-kunobva kune substrate kunogona kukurumidza kuomesa adhesive.
Ese mafirita anoda pamusoro passivation kana silane kurapwa kudzivirira yakawandisa modulus kusimuka uye kunamira kuomesa patembiricha yakaderera.
Pfupiso - Iyo Adaptive Network yeExtreme Conditions
The adhesive layer of wide-temperature-range PTFE matepi akanyanya platinamu-catalyzed yekuwedzera crosslinking microphase-separated network yakamisikidzwa neMQ resin chemical anchoring sites uye hybrid phenyl refu-chain siloxanes. Via gradient crosslinking uye co-crosslinking matekinoroji, inobatanidza zvakakwana:
... mukati meimwe elastic adhesive layer, inosangana neyakaomarara-tembiricha-renji yekushandisa zvinodiwa.
Aokai PTFE inogadzira tepi-tembiricha yePTFE ichishandisa inonamira system dhizaini. Tsika dzakatemwa - dzinosanganisira ukobvu, crosslink gradient, uye kurodha mafirita - anowanikwa kune chaiwo maapplication.
Ichi chinyorwa chehunyanzvi chinopihwa ne Jiangsu Aokai New Material Technology Co., Ltd.
Kana iwe uchida kudzidza zvakanyatsotsanangurwa, mamiriro ekushandisa uye zvigadziriso zvakagadziridzwa zvechigadzirwa chedu chizere, zvinosanganisira PTFE yakakwirira-tembiricha machira, PTFE adhesive matepi, PTFE mesh mabhandi ekutakura, seamless fusing muchina mabhandi, single-sided PTFE yakavharwa jira, yakakwirira-tembiricha inodzivirira bhandi remhepo, ndapota taura nesu nefiber-fiber. chiteshi pazasi:
Isu tinonamatira kuhuzivi hwesevhisi yehunyanzvi uye kutendeseka, yakatsaurirwa kukupa iwe-imwe-yekumira yakakwana mhinduro uye inofunga rutsigiro!
