Ububanzi bezinga lokushisa elibanzi Itheyiphu ye-PTFE kufanele ihlangane ngokuthembekile ku-70°C (noma ngaphansi) futhi isinde ekuchazweni okuqhubekayo ku-200-260°C – ubude besikhathi esingaphezu kuka-300°C. Lokhu kudinga isistimu yokunamathela ehlala iguquguquka ngaphandle kokwehluleka ukuhlangana noma ukuxhumanisa phakathi kobuso noma ngabe kudlulele kangakanani.
Isendlalelo esinamathelayo ngokuvamile siyi-adhesive ekhethekile ye-silicone ezwela ukucindezela (PSA) enamathiselwe kumafilimu e-PTFE alungiswe phezulu noma indwangu ye-fiberglass efakwe yi-PTFE. Ukhiye wokusebenza okuzinzile kulo lonke iwindi lokushisa elibanzi kangaka usekwakheni inethiwekhi eguquguqukayo - idizayini elinganisa ukumanzisa kwezinga lokushisa eliphansi, ukumelana nokukhuphuka kwezinga lokushisa eliphezulu, nokubekezelela ukushaqeka kokushisa.
I-Aokai PTFE ithuthukise amateyipu we-PTFE wamazinga okushisa abanzi isebenzisa izimiso ezichazwe ngezansi. Lesi sihloko sichaza izinto ezine zomklamo eziwumongo: ukwakheka kongqimba olushintshayo, i-sea-island biphasic microstructure, i-gradient crosslinking, nezigcwalisi eziyinhlanganisela ezizinziswe nokushisa.
Ukwakheka Kwesendlalelo Esiguqukayo Phakathi Kwe-Substrate Nesendlalelo Esinamathelayo
1. Inselele eyinhloko - amandla e-PTFE angaphezulu
I-PTFE ifaka amandla angaphezulu aphansi kakhulu (18-20 dynes/cm). Ukunamathela okuqondile kwe-adhesive kuvame ukuxebuka ngesikhathi sokuhamba ngebhayisikili okushisayo ngenxa yokungafani kwamakhoefiyenti wokunweba okushisayo - i-PTFE inweba ngo-30-40x ngaphezu kwe-fiberglass.
2. Ukwenziwa kusebenze kobuso kanye nokunamathisela kwe-primer
Ukuze kuxazululwe lokhu, indawo ye-PTFE ifakwa amakhemikhali etching nge-sodium-naphthalene complexes noma ukwelashwa kwe-plasma ukwethula amabhondi aphindwe kabili e-C=C kanye namaqembu e-polar aqukethe umoya-mpilo. Ngemva kwalokho, i-silicone primer ezinikele kakhulu (isb., i-vinyl-containing silane coupling agent) isetshenziswa ukwakha 'ibhuloho lamangqamuzana' esixhumi esibonakalayo ngokusebenzisa i-chemical bonding.
3. I-interlayer ye-stress-buffering
Ekwenziweni okuthile, ungqimba oluphakathi lwe-modulus oluphansi, lwe-ductility ephezulu (i-silicone efana nejeli enamasegimenti aguquguqukayo) ifakwa phakathi kwesendlalelo esicushiwe kanye nesendlalelo sokunamathisela esikhulu. Lokhu kudonsa ingcindezi yokuhlangana kobuso okubangelwa ukushintshashintsha kwezinga lokushisa okubukhali futhi kuvimbele ukuphakanyiswa konqenqema kokunamathelayo.
I-Sea-Island Biphasic Microstructure Regulation
I-matrix enamathelayo eyinhloko iyisistimu ye-PSA yakudala ehlanganisa i- MQ silicone resin (isigaba sesiqhingi esihlakazekile) kanye ne -polysiloxane enesisindo esiphezulu samangqamuzana (isigaba solwandle esiqhubekayo).
1. I-MQ silicone resin - isigaba sesiqhingi esinzima
Inikeza ukuhlangana, amandla okubamba, kanye nokumelana nokukhuphuka kwezinga lokushisa eliphezulu. Ukulawulwa okunembile kwesilinganiso sayo se-M/Q se-molar (imvamisa engu-0.6-0.9) kanye nokuhlakazwa kosayizi wezinhlayiyana kuqinisekisa ukushumeka okufanayo ngaphakathi kwesigaba esiqhubekayo ukuze kwakhiwe amasayithi okuphambana ngokomzimba.
2. Isigaba esiqhubekayo se-Polysiloxane - isigaba solwandle oluthambile
Iletha i-tack esheshayo, ukumanzisa kwezinga lokushisa eliphansi, nokuguquguquka. Irabha ye-silicone ye-methyl vinyl enesisindo esiphezulu noma i-methyl phenyl vinyl silicone irabha ivamise ukukhethwa.
3. Ukwenza kahle okukhethekile kwebanga lokushisa elibanzi
Inani elincane lamasegimenti e-siloxane anephenyl-okuqukethwe okuphezulu afakiwe. Amaqembu e-Phenyl acindezela i-crystallization yezinga lokushisa eliphansi le-polydimethylsiloxane, ehlisa izinga lokushisa le-adhesive brittleness libe ngaphansi kuka-100°C. Ngaleso sikhathi, amaqembu e-phenyl athuthukisa ukumelana nokuwohloka kwe-thermal-oxidative emazingeni okushisa aphezulu, okwenza ukuthi isigaba solwandle esiqhubekayo sigcine ukunwebeka okuphezulu efasiteleni elibanzi lokushisa.
I-Multi-Layer noma i-Gradient Crosslinking Design yokumelana nokushaqeka kwe-Thermal
Inqubo yokumboza enezendlalelo ezimbili iyamukelwa ukuze kulinganiswe ukumelana nokukhuphuka kwezinga lokushisa eliphezulu kanye nokuqina kwezinga lokushisa eliphansi:
1. Isendlalelo sangaphakathi (uhlangothi lwe-substrate)
ngokuqhathaniswa Ukuminyana kwe-crosslink okuphezulu , iletha amandla aqinile okubambile ezinga lokushisa eliphezulu namandla ahlangene njengohlaka olumelana ne-shear.
2. Isendlalelo sangaphandle (indawo ebophayo)
Ubuningi be-crosslink obuphansi kakhulu obunamaketanga amangqamuzana ahamba kakhulu, okuqinisekisa ukumanzisa okusheshayo kokunamathela emazingeni okushisa aphansi kanye nokuthinta okwanele kokuqala.
Kungenjalo, i-gradient eqhubekayo yokuminyana kwe-crosslink ukusuka ohlangothini lwangaphakathi kuye kwangaphandle yakheka ngaphakathi kwesendlalelo esisodwa ngezinqubo zokuphulukisa, ehlanganisa kalula izindawo zokusebenza eziqinile nezivumelana nezimo.
I-Aokai PTFE isebenzisa ubuchwepheshe be-gradient crosslinking ukuze kuqinisekiswe ukuthi itheyiphu ihlala iguquguquka ku-70°C (inika amandla i-tack yokuqala nokuvumelana) kuyilapho igcina amandla okuhlangana ku-260°C (ivimbela ukukhasa nokudluliswa kwe-adhesive).
Izihlungi Ezihlanganisiwe Zokushisa
I-Nano-scale fumed silica ihlakazeke kahle ku-adhesive matrix ukuze iqiniswe, ihlanganiswe nezigaba ezimbili zokugcwalisa okusebenzayo:
1. Izithasiselo ezikwazi ukumelana nokushisa
I-Cerium oxide, i-iron oxide, nezinye i-radical scavengers zivimbela ukuqina kwe-oxidative kwamaketango aseceleni e-siloxane kanye nokuwohloka komgogodla ngaphansi kokushisa okuphezulu. Lawa ma-antioxidants andisa impilo yesevisi ku-260°C.
2. Izithako ezishisayo ezishisayo
I- aluminum nitride, i-alumina , njll., isusa ukushisa ngokushesha ukuze inciphise ukunqwabelana kokushisa kwangaphakathi futhi yehlise ukuguga. Lokhu kubaluleke kakhulu ezinhlelweni zokusebenza lapho itheyiphu isetshenziswa njengesixhumi esibonakalayo esishisayo noma lapho ukwakheka kokushisa okuvela ku-substrate kungasheshisa ukuwohloka kokunamathelayo.
Wonke ama-filler adinga i-surface passivation noma ukwelashwa kwe-silane ukugwema ukukhuphuka kwe-modulus ngokweqile kanye nokuqina kokunamathela emazingeni okushisa aphansi.
Isifinyezo – Inethiwekhi Eguqukayo Yezimo Ezidlulele
Isendlalelo esinamathelayo samateyipu e-PTFE enamazinga okushisa abanzi empeleni iyiplatinum-catalyzed add crosslinking microphase-separated network eshumekwe ne-MQ resin chemical anchoring sites and hybrid phenyl long-chain siloxanes. Ngobuchwepheshe bokuphambana kwe-gradient kanye no-co-crosslinking, buhlanganisa ngokuphelele:
...ngaphakathi kwesendlalelo sokunamathisela esisodwa esinwebekayo, esihlangabezana nezidingo eziqinile zohlelo lokusebenza lwebanga lokushisa elibanzi.
I-Aokai PTFE ikhiqiza amateyipu e-PTFE anezinga lokushisa elibanzi isebenzisa lo mklamo wesistimu yokunamathela. Ukucaciswa ngokwezifiso - okuhlanganisa ukujiya, ukuhleleka kwe-crosslink, nokulayisha kokugcwalisa - kuyatholakala ngezidingo ezithile zohlelo lokusebenza.
Lesi sihloko sobuchwepheshe sinikezwa ngu I-Jiangsu Aokai New Material Technology Co., Ltd.
Uma ufisa ukufunda ukucaciswa okuningiliziwe, izimo zohlelo lokusebenza nezixazululo ezenziwe ngokwezifiso zohlelo lwethu oluphelele lomkhiqizo, okuhlanganisa izindwangu ze-PTFE ezishisa kakhulu, amateyipu anamathelayo e-PTFE, amabhande okuthutha anezikhala ze-PTFE, amabhande omshini wokuhlanganisa angenamthungo, indwangu eboshwe ohlangothini olulodwa lwe-PTFE, i-high-temperature resistant, nge-fiberglass iziteshi ezingezansi:
Sinamathela kufilosofi yesevisi yobungcweti nobuqotho, ezinikele ekukunikezeni izixazululo ezibanzi zokuma okukodwa kanye nokwesekwa okucatshangelwayo!
