Uluhlu olubanzi lobushushu Iteyiphu ye-PTFE kufuneka ibophe ngokuthembekileyo kwi -70 ° C (okanye ngaphantsi) kwaye iphile kwi-exposure eqhubekayo kwi-200-260 ° C - ubude obungaphezulu kwe-300 ° C. Oku kufuna inkqubo yokuncamathelisa ehlala ibhetyebhetye ngaphandle kokusilela okudityanisiweyo okanye ukudityaniswa kobuso nokuba kugqithise kangakanani na.
Umaleko wokuncamathelisa ngokwesiqhelo yi-adhesive ekhethekileyo ye-silicone-sensitive adhesive (PSA) eqatywe kumphezulu-modified PTFE films okanye PTFE-impregnated fiberglass ilaphu. Isitshixo sokusebenza okuzinzileyo kuyo yonke iwindow ebanzi yobushushu lele ekwakhiweni kothungelwano oluguquguqukayo - uyilo olulinganisa ukumanzisa okuphantsi kobushushu, ukumelana nobushushu obuphezulu, kunye nokunyamezela ukothuka kwe-thermal.
I-Aokai PTFE iphuhlise iteyiphu zobushushu obubanzi be-PTFE isebenzisa imigaqo echazwe ngezantsi. Eli nqaku lichaza izinto ezine ezingundoqo zoyilo: ulwakhiwo lomaleko wenguqu, i-biphasic microstructure ye-biphasic ye-sea-island, i-gradient crosslinking, kunye ne-heat-stabilized composite fillers.
Ulwakhiwo loMaleko woTshintsho phakathi kwe-Substrate kunye ne-Adhesive layer
1. Umceli mngeni ophambili – PTFE amandla omphezulu
Iimpawu ze-PTFE zamandla aphantsi kakhulu (18-20 dynes/cm). Ukugquma ngokuthe ngqo kwe-adhesive kudla ukuxobuka ngexesha lokuhamba ngebhayisikile eshushu ngenxa yokungahambelani kokwandiswa kwe-thermal coefficients - i-PTFE yandisa i-30-40x ngaphezu kwe-fiberglass.
2. Ukusebenza komphezulu kunye ne-primer anchoring
Ukusombulula oku, umphezulu we-PTFE uhamba ngekhemikhali etching kunye ne-sodium-naphthalene complexes okanye unyango lwe-plasma ukwazisa i-C = C ibhondi ephindwe kabini kunye namaqela e-polar aqukethe i-oksijini. Emva koko, i-silicone primer ene-vinyl-containing silane coupling igalelwa ukwenza 'ibhulorho yemolekyuli' kumda wojongano ngekhemikhali.
3. I-Stress-buffering interlayer
Kwimiqulu ethile, i-modulus ephantsi, i-high-ductility elastic intermediate layer (i-gel-efana ne-silicone enamacandelo aguquguqukayo) ifakwe phakathi koluhlu olusebenzayo kunye noluhlu oluphambili lwe-adhesive. Oku kutsala uxinzelelo oluphakathi kobuso olubangelwa kukuguquguquka okubukhali kobushushu kwaye kuthintele ukuphakanyiswa komphetho we-adhesive.
Sea-Island Biphasic Microstructure Regulation
I-matrix ye-adhesive ephambili yinkqubo ye-PSA ye-classic equkethe i -MQ silicone resin (isigaba sesiqithi esasasazekayo) kunye ne-polysiloxane ephezulu ye-molecular-weight (isigaba solwandle esiqhubekayo).
1. I-resin ye-silicone ye-MQ - isigaba sesiqithi esinzima
Ibonelela ngokubambisana, ukubamba amandla, kunye nobushushu obuphezulu bokuchasa. Ukulawulwa ngokuchanekileyo kwe- M / Q ye-molar ratio (ngokuqhelekileyo i-0.6-0.9) kunye ne-particle size dispersion iqinisekisa ukubethelwa okufanayo ngaphakathi kwesigaba esiqhubekayo ukwenza iziza ezinqamlezayo zomzimba.
2. I-Polysiloxane isigaba esiqhubekayo - isigaba solwandle oluthambileyo
Ihambisa ngokukhawuleza, ukumanzisa okuphantsi kobushushu, kunye nokuguquguquka. I-high-molecular-weight-methyl vinyl silicone irabha okanye i-methyl phenyl vinyl irabha ye-silicone idla ngokukhethwa.
3. Ukulungiswa okukhethekileyo kuluhlu olubanzi lobushushu
Inani elincinci lamacandelo e-siloxane aphezulu-phenyl-content afakwe. Amaqela e-Phenyl acinezela ubushushu obuphantsi becrystallization ye-polydimethylsiloxane, ehlisa ubushushu be-adhesive brittleness ngaphantsi kwe-100°C. Ngeli xesha, amaqela e-phenyl aphucula ukuxhathisa kokuthotywa kwe-thermal-oxidative kumaqondo obushushu aphezulu, okwenza ukuba isigaba solwandle esiqhubekayo sigcine ukunwebeka okuphezulu kwifestile yobushushu obubanzi.
I-Multi-Layer okanye i-Gradient Crosslinking Design ye-Thermal Shock Resistance
Inkqubo yokugquma imigangatho ephindwe kabini yamkelwa ukulinganisa ukuxhathisa kobushushu obuphezulu kunye nobushushu obuphantsi:
1. Umaleko wangaphakathi (icala lesubstrate)
, Uxinaniso oluphezulu lwe-crosslink ukunikezela ngamandla okubamba ubushushu obuphezulu kunye namandla abambeneyo njengesakhelo sokumelana ne-chear.
2. Umaleko wangaphandle (umphezulu odibanisayo)
Uxinaniso lwe-Ultra-low crosslink kunye namatyathanga emolekyuli ashukumayo kakhulu, okuqinisekisa ukumanzisa okukhawulezayo kokubambelela kumaqondo obushushu asezantsi kunye nokuthotywa okwaneleyo kokuqala.
Kungenjalo, igradient eqhubekayo yoxinaniso lwe-crosslink ukusuka ngaphakathi ukuya kwicala langaphandle yenziwa ngaphakathi kwinqanaba elinye ngeenkqubo zokunyanga, ezidibanisa ngaphandle komthungo ezomeleleyo kunye neendawo eziguquguqukayo zokusebenza.
I-Aokai PTFE isebenzisa iteknoloji ye-gradient crosslinking ukuqinisekisa ukuba i-tape ihlala iguquguqukayo kwi-70 ° C (ivumela ukuba i-tack yokuqala kunye nokuhambelana) ngelixa igcina amandla okubambisana kwi-260 ° C (ukuthintela ukukhahlela kunye nokugqithiswa kwe-adhesive).
IiFili ezidityanisiweyo ezizinzisiweyo zobushushu
I-Nano-scale fumed silica isasazwe kakuhle kwi-matrix encamathelayo ukuze yomelezwe, idityaniswe neendidi ezimbini zezihluzi ezisebenzayo:
1. Izongezo ezinokumelana nobushushu
I-Cerium oxide, i-iron oxide, kunye nezinye i-scavengers ezinzulu zinqanda ukuqina kwe-oxidative ye-siloxane yecala lamatyathanga kunye nokuthotywa komqolo phantsi kobushushu obuphezulu. Ezi antioxidants zandisa ubomi benkonzo kwi-260 ° C.
2. Iifayili ze-thermal conductive
I-Micron-ubungakanani be-aluminium nitride, i-alumina , njl., ikhupha ngokukhawuleza ubushushu ukunciphisa ukuqokelela kobushushu bangaphakathi kunye nokucotha ukuguga. Oku kubaluleke kakhulu kwizicelo apho i-tape isetyenziswe njenge-interface ye-thermal okanye apho ukwakhiwa kobushushu ukusuka kwi-substrate kunokunyusa ukuthotywa kwe-adhesive.
Zonke izihluzi zifuna ukunyangwa komphezulu okanye ukunyangwa kwe-silane ukunqanda ukunyuka kwemodulus egqithisileyo kunye nokuqina kokuncamathelisa kumaqondo obushushu aphantsi.
Isishwankathelo – Uthungelwano oluLungisayo lweeMeko eziBabekileyo
I-adhesive layer of wide-range-temperature-range ye tapes ze-PTFE ngokubalulekayo iplatinam-catalyzed addition crosslinking microphase-separated network efakwe ne-MQ resin anchoring sites chemical and hybrid phenyl long-chain siloxanes. Ngokudibanisa i-gradient crosslinking kunye ne-co-crosslinking teknoloji, imanyanisa ngokugqibeleleyo:
...ngaphakathi kwendawo enye encamathelayo enelastiki, ikhawulelana neemfuno ezingqongqo zoluhlu lobushushu boluhlu olubanzi.
I-Aokai PTFE yenza iiteyiphu zobushushu obubanzi ze-PTFE isebenzisa oluyilo lwenkqubo yokuncamathelisa. Iimpawu eziqhelekileyo - kubandakanywa ubukhulu, i-gradient ye-crosslink, kunye nokulayishwa kokugcwalisa - ziyafumaneka kwiimfuno ezithile zesicelo.
Eli nqaku lobugcisa linikezelwa ngu IJiangsu Aokai yeTekhnoloji eNtsha yeTekhnoloji Co., Ltd.
Ukuba unqwenela ukufunda iinkcukacha ezicacileyo, iimeko zesicelo kunye nezisombululo ezilungiselelwe ulungelelwaniso olupheleleyo lwemveliso, kubandakanywa amalaphu e-PTFE anobushushu obuphezulu, iiteyiphu ezincamathelayo ze-PTFE, amabhanti okuhambisa umnatha we-PTFE, amabhanti omatshini wokufunxa angenamthungo, ilaphu elicandisiweyo le-PTFE elinecala elinye, i-high-temperature resistant conveyorglass nceda uqhagamshelane nathi nge-fiberglass. Imijelo engezantsi:
Sibambelela kwifilosofi yenkonzo yobungcali kunye nemfezeko, ezinikele ekukuboneleleni ngezisombululo ezibanzi kunye nenkxaso enengqiqo!
