Lo mfutshane wobugcisa ovela kuJiangsu Aokai uhlalutya indlela amaqondo obushushu aphantsi okanye aphezulu alonakalise ngayo i-PTFE yobushushu obuphezulu. I-sintering ephantsi ishiya amasuntswana anganyibilikiyo, ebangela i-micro-pores, i-coating-substrate bonding ebuthathaka, indawo erhabaxa, amandla omatshini abuthathaka, kunye nenkangeleko yobisi emhlophe. Ubushushu obugqithisileyo bubangela i-PTFE ukuthotywa kwe-thermal, ivelise imingxunya, amaqamza, ukonakala, ukujika kombala omthubi ukuya kwabamnyama, kunye nokukhupha imisi eyityhefu. Zombini ezi zinto zigqithileyo zitshabalalisa ukubumbana, ukusebenza okungabambekiyo, ukuguquguquka, ukugquma, kunye nokuzinza komda.

I-PTFE i-gaskets ekhusela ilaphu eliphezulu idibanisa amandla aphezulu e-dielectric (uzinzile phantsi komswakama), -70 ° C ukuya kwi-260 ° C uluhlu lobushushu, ukuxhathisa imichiza jikelele (ngaphandle kweentsimbi ezityhidiweyo zealkali), indawo engasiyontonga (ithintela i-creepage), i-anti-creep (i-fiberglass reinforcement vs. V-0 idangatye ukukala. Xa kuthelekiswa ne-mica, irabha, kunye ne-PTFE gaskets ecocekileyo, ilaphu le-PTFE libonelela ngokuguquguquka okuphezulu, ukuqhubekeka, kunye nokuzinza kwexesha elide. Ilungele iziguquli, ukugqunywa kwemoto, ukutywinwa kweekhemikhali zeflange, kunye nezixhobo zesemiconductor.

Ixabiso le-emulsion ye-PTFE iphenjelelwa zizinto kulo lonke ikhonkco leshishini. Iindleko ezinyukayo (ukumbiwa kwefluorite, izabelo zefriji ezingama-R22) zibeka umgangatho wexabiso elisisiseko. Imfuno esezantsi evela kwizibophelelo zebhetri ye-lithium yeyona nto iphambili yokukhula. Izinto zokubonelela (amaxabiso okusebenza kwishishini, ukugcinwa kwezityalo) kunye nomgangatho wemveliso (umxholo oqinileyo, ubungakanani besuntswana, ibakala lokucoceka) kudala amaxabiso amaxabiso. Imigaqo yokusingqongileyo (PFOA/PFAS izithintelo) inyusa iindleko zokuthotyelwa. Ulungiselelo (uthutho lwekhonkco elibandayo) longeza indleko enkulu. Iintsingiselo zexabiso zilandela ingqiqo engundoqo: iindleko ze-fluorite/hydrofluoric acid = umgangatho; imfuno yebhetri entsha yamandla = intsingiselo yendlela; amazinga okusebenza kunye nemigaqo-nkqubo = izinto ezibangela ukuguquguquka kwexesha elifutshane.

Iteyiphu ye-PTFE yombhobho wekhemikhali / isitya sokuchasa umhlwa, ukungagugi, kunye nokhuseleko lokutywina lufuna i-substrate ehambelanayo, inkqubo yokuncamathelisa, kunye nemidiya yekhemikhali. I-Silicone PSA inconywa kwi-200-260 ° C kunye ne-acids / alkalis; I-acrylic PSA ixhathisa izinyibilikisi eziphilayo kodwa inciphisa ubushushu ukuya ku-≤150°C. Kwi-HF, ukubilisa >80% alkali, okanye i-chlorine trifluoride, sebenzisa i-PTFE-kuphela i-lining (ayikho i-organic adhesive). Okubalulekileyo: i-adhesive lelona khonkco libuthathaka, hayi i-PTFE ngokwayo.

PTFE ilaphu flatness ngexesha sintering kufuna uxinzelelo oluchanekileyo, ubushushu, kunye nolawulo lokuzibamba. Iindlela ezingundoqo: umatshini we-stenter (iipleyiti zepini zigcina ububanzi, zithintela ukuncipha kwe-weft), iphrofayili yobushushu be-gradient (ukufudumeza okucothayo → 380-400 ° C ukubamba → ukupholisa okucothayo ngaphantsi kwe-310 ° C ngaphambi kokukhulula ukuxhatshazwa), i-substrate yangaphambili (isusa uxinzelelo olulukiweyo ngaphambi kokugquma), kunye nobukhulu obufanayo bokugquma (ukuthintela ukunyibilika kokwahlukana). Ukuthintela i-Sternter kufuneka kugcinwe kude kube nokupholisa ngaphantsi kwe-PTFE crystallization point (malunga ne-310 ° C) ukukhusela i-warpage.

Ukwaleka ukufana ngexesha le-PTFE emulsion imregnation yelaphu le-fiberglass ngumgca wobomi bomgangatho wemveliso. Ukungalingani kokugquma oonobangela: ukungaphumeleli kwentonga (ukuncamathela kwiindawo ezibhityileyo), ubuthathaka bomatshini (uxinzelelo loxinzelelo, ukukrazula), ukungazinzi kombane (ukuqhekeka kombane wehla ukuya ku-1/10), ukungena kweekhemikhali (i-pinhole corrosion), imiba yobukhulu (i-warpage), kunye neziphene zokulungisa (ibhanti ebhadulayo, ukuguquguquka kobukhulu). Ukwaleka okufanayo kufuna ulawulo oluchanekileyo lwe-emulsion viscosity, umxholo oqinileyo, ukuxinezeleka kwelaphu, izithuba ezixineneyo, kunye neeprofayili zokomisa / ze-sintering kwiindawo ezininzi.

I-PTFE tape yokubamba amandla aphuculwe ngokutyabeka kunye nokunyanga inkqubo yokwandisa. Ukwambathisa: umaleko primer (0.5-2μm silane primer kuthintela adhesive peeling), ukuncamathelisa ubukhulu 30-60μm (elona lifanelekileyo ukubamba amandla), vacuum defoaming, kunye 5-10μm filtration. Ukunyanga: ukufudumeza okuhamba ngamanyathelo (80-100 ° C ukususwa kwe-solvent → 120-140 ° C ukubunjwa → 150-220 ° C i-crosslinking enzulu), i-post-curing (40-60 ° C ye-24-48h yokuphumla uxinzelelo), kunye ne-low-tension conveyance ukukhusela uxinzelelo lwangaphakathi kwi-substrate shrinkage. I-primer ibalulekile kumandla asezantsi e-PTFE.

Ilaphu le-PTFE elinobushushu obuphezulu liya kumanqanaba amane otshintsho lwesakhiwo njengoko ubushushu bunyuka: ngaphantsi kwe-260°C – ukuqhekeka okucothayo okuncinci kunye nokuguquguquka okuseleyo kokongeza; kwi-327 ° C (i-melting point) - i-crystalline-to-amorphous transition, i-coating iyancipha, iyancipha kwi-fiberglass; 400-500 ° C - PTFE depolymerizes (ikhupha iigesi ezinetyhefu), i-coating iyanyamalala; ngaphezu kwe-500 ° C - i-fiberglass iyancipha (i-840 ° C i-softening point) kwaye ilahlekelwa yingqibelelo yesakhiwo. Hlala ngaphantsi kwe-260 ° C ngokuqhubekayo, unqande > iincopho ze-300 ° C ukuze usebenze ngokukhuselekileyo.

Ilaphu le-PTFE elinobushushu obuphezulu liveliswa nge-single-dip impregnation (ipasi enye: ngokukhawuleza, ngexabiso eliphantsi, isambatho esibhityileyo, indawo erhabaxa enemibhobho) okanye i-multi-dip impregnation (i-2-3+ idlula: i-coating egudileyo, eshinyeneyo, i-pinhole-free, umxholo we-PTFE 50-70%, ukusebenza kweprimiyamu, ixabiso eliphezulu). Idiphu enye ifanela iigaskets zomgangatho ophantsi, iimethi zexeshana, kunye nezinto eziphefumlayo. I-Multi-dip iyafuneka kumaphepha okubhaka ebakala lokutya, amabhanti okuhambisa angeyontonga, i-high-frequency circuit substrates, ii-chemical liners, kunye ne-architectural membranes.

I-PTFE yobushushu obuphezulu bonyango lomphezulu welaphu lophula ukunganyaniseki kweekhemikhali kwibhondi/yokushicilela. Iindlela ezine: i-chemical etching (i-sodium-naphthalene, amandla angaphezulu kwe-20→ 40-50 dyn / cm, isigxina esimnyama esisisigxina, isakhiwo se-micro-porous), unyango lwe-plasma (i-nano-roughening, i-grafting yeqela elisebenzayo, ifestile emfutshane esebenzayo), unyango lwe-corona (ifilimu encinci, ukubola okukhawulezayo, ubunzulu obuncinci), kunye nonyango lwe-laser (i-precision micro-patterning, i-controlled carbonization). Zonke iindlela zirhabaxa ngokwasemzimbeni kwaye zazisa ngokwekhemikhali amaqela amhlophe (C=O, -OH, -COOH) ukwenza ukuba kudityaniswe izinto ezincamathelayo.