Nini Iteyiphu encamathelayo ye-PTFE isetyenziselwa ukutywina amacandelo abona ukufuma-njengeentsimbi zombane, iiflange ze-HVAC, okanye izivalo zesikhongozeli sekhemikhali – ingcinga eqhelekileyo yeyokuba i-PTFE's hydrophobicity iqinisekisa umqobo womphunga wamanzi ogqibeleleyo. Oku akusoloko kuyinyani.
Iimolekyuli zomphunga wamanzi zincinci. Ziyakwazi ukusasazwa kwiindlela ezincinci ezingenakubonwa ngamanzi amaninzi. Olona qondo losulelo lomphunga wamanzi (WVTR) we PTFE tape ixhomekeke kancinci kwichemistry ye PTFE nangaphezulu kwisakhiwo sokugquma – iziphene ezifana ne micropores, microcracks, kunye nefiber encapsulation engaphelelanga.
I-Aokai PTFE iye yahlalutya i-WVTR kuzo zonke iifomyulwa zokwaleka kunye nobukhulu. Eli nqaku licacisa indlela ubume beekhemikhali ze-PTFE, iziphene zokugquma, amaqhinga okutyeba, kunye nohlengahlengiso lokuzalisa ludibanisa ukumisela ukusebenza komqobo womphunga.
Ulwakhiwo lweMichiza ye-PTFE-Zombini i-Advanteji kunye noMda
1. Izinto eziluncedo - Hydrophobicity kunye neCrystallinity
Uphawu |
Inzuzo kwisithintelo soMphunga waManzi |
Iibhondi zeCF, amandla aphantsi komhlaba |
Iimolekyuli zamanzi azifane zibhengeze okanye zinyibilike kumphezulu we-PTFE-umqobo ophambili ngokuchasene nokungena kokufuma. |
Ubucwebe obuphezulu (>90%) |
Imimandla yecrystalline iphantse yangakwazi ukungena kumphunga wamanzi-ayikho indlela yokusasazwa kweemolekyuli ngeekristale. |
2. Imida - i-Amorphous Domains kunye ne-Weak Intermolecular Forces
Amandla e-intermolecular abuthathaka phakathi kwamatyathanga emolekyuli e-PTFE
kwi I-voids enkulu yasimahla -amorphous domain idala iindlela zokusasaza
Ifilimu ecocekileyo ye-PTFE ihambisa kuphela inqanaba eliphakathi le-WVTR -ingaphantsi kakhulu kune-PVDC okanye i-EVOH
I-PTFE ayisiyomathiriyeli egqibeleleyo ngokwendalo
Ukuqonda okuphambili: I-PTFE yangaphakathi ngumqobo ophakathi, hayi okhethekileyo. Ukusebenza kweteyiphu esebenzayo kuxhomekeke kakhulu kwiziphene zokugquma.
Iziphene zeCoating Critical-Critical Coating-Micropores, Microcracks, kunye neFiber Wicking
Lo ngowona mba uphambili olawula ukusebenza komqobo obonakalayo. Uninzi lweeteyiphu ezincamathelayo ze-PTFE zenziwa ngokufakwa okanye ukugqunywa kwe-PTFE yokusasazwa kulandelwa kukuntywila, ngexesha apho iziphene zendalo zenziwe ngokulula:
Uhlobo lwesiphene |
Inkqubo yokuSeka |
Isiphumo kwi-WVTR |
IiMicropores |
Izinyibilikisi ezine-Volatilized kunye ne-resin fusion engaphelelanga zishiya i-voids edibeneyo |
Yenza iindlela ezimfutshane zokungena komphunga |
IiMicrocracks |
Ukungahambelani kolwandiso lwe-thermal phakathi kwe-fiberglass substrate kunye ne-PTFE ibangela ukuqhekeka okuhle emva kokupholisa / ukupholisa. |
Ivula imijelo ngokuthe ngqo ngokugquma |
I-Capillary wicking of fibers |
Ukungaphelelanga kokugqunywa kwemisonto yeglasi kuvumela umphunga wamanzi ukuba urhubuluze ecaleni kojongano lwefiber-resin ngokusebenzisa isenzo secapillary. |
Yenza umphunga ujike ujikeleze isambatho |
Isiphelo esisebenzayo: I-WVTR iyonke ye tape ye-PTFE egqityiweyo ilawulwa ikakhulu sisiphene soxinaniso , hayi ipropathi engaphakathi yobuninzi be-PTFE resin.
I-Aokai PTFE ibonelela ngeeteyiphu ezincamathelayo ze-PTFE ezinoxinano olulawulwayo lokugquma. Kwizicelo ezifuna i-WVTR ephantsi (<15 g/m²·imini), sicebisa udidi lwethu olunamaleko amaninzi, olusebenzisa ukupasa okuthathu ukugquma imingxunya ngokulandelelana kunye nokunciphisa ukuxinana kwemicrocrack.
Ukutyeba kweCoating kunye neLabyrinth Effect - Amaqhinga okunciphisa i-WVTR
Ukunyuka kobunzima bokugquma bandisa indlela yokungena komphunga kodwa ngokulambathayo kugquma iziphene ezikhoyo kulwakhiwo lodwa. Izisombululo ezisebenzayo ngakumbi zokuphucula zidweliswe ngezantsi:
Isicwangciso |
Inkqubo |
Ukusebenza kakuhle |
I-Multi-layer coating |
Ukufakwa ngokuphindaphindiweyo kunye nokuntywila kwenza ukuba iileya zokugquma ezilandelayo zigqume imingxunya kunye nokuphelisa izikhundla zesiphene kwiidyasi ezingaphantsi. |
Iphezulu - eyona isebenzayo |
I-Lamellar filler ukuguqulwa |
Izihluzi ezinert flaky ezingasebenziyo (mica powder, glass flakes) zidityaniswa zibe PTFE coatings ukunyanzela iimolekyuli zamanzi ukuba zijike (i-labyrinth effect) |
Iphezulu kakhulu - inciphisa kakhulu i-WVTR |
Idyasi enye etyebileyo |
Indlela ende yokusasaza kodwa iziphene zihleli |
Phantsi – ayikhuthazwa yodwa |
Isilumkiso kunye nezihluzi: Ukulayishwa okugqithisileyo kwesihluzi kuya kubeka esichengeni ukuguquguquka kunye nepropathi engeyiyo intonga yeemveliso ezigqityiweyo. Ibhalansi iyafuneka.
Imeko yoMphezulu-I-Hydrophobic kodwa Ayinazigqibo
I-hydrophobic PTFE coating ine-angle yoqhagamshelwano lwamanzi aphezulu (ngokuqhelekileyo i-110-120 °), inqanda ukubunjwa kwefilimu eqhubekayo yamanzi phezu komhlaba kunye nokunciphisa ngokungathanga ngqo amandla okuqhuba ukungena komphunga.
Nangona kunjalo: Olu ncedo lomphezulu alukwazi ukukhawulelana nomqobo ombi obangelwa ziziphene zokwaleka zangaphakathi. Ukuba ii-micropores okanye iintanda zikhona, umphunga wamanzi usaza kusasazeka ngaphandle kokujonga umphezulu we-hydrophobicity.
Umba |
Impembelelo kwi-WVTR |
Ukulawula Okusebenzayo |
Ubukhazikhazi be-PTFE yangaphakathi |
Isiseko esiphakathi |
Fixed - ayilawuleki kwimveliso |
I-Micropores evela kwi-sintering engaphelelanga |
Phezulu (yenza iindlela ezimfutshane) |
Lungiselela iprofayile ye-sintering - ukupholisa okucothayo, ubushushu obuphezulu |
Ii-Microcracks ezisuka kukwandiswa kwe-thermal ukungahambelani |
Phezulu kakhulu |
I-Multi-layer layering, i-FEP ephakathi, ukupholisa okucothayo |
I-Fiber wicking (i-encapsulation engaphelelanga) |
Phezulu |
Qinisekisa ukufakwa ngokupheleleyo - ivacuum inceda kumalaphu ashinyeneyo |
Ubunzima bokugquma (umaleko omnye) |
Phantsi |
Ayisebenzi yodwa |
I-Multi-layer coating |
Phezulu (igquma iziphene) |
Cacisa i-2-4 yokupasa kokukhulelwa |
Izihluzi zeLamellar (mica, iiflakes zeglasi) |
Iphezulu kakhulu (i-labyrinth effect) |
Yongeza i-10-20 wt%, lungiselela ukusasazwa |
Kuzaliswe + indibaniselwano yamanqanaba amaninzi |
Ephezulu (<10 g/m²·usuku) |
Eyona nto ibhetele kwizicelo zesithintelo esibalulekileyo |
Ukuthathwa kokugqibela: Xa i-PTFE iteyiphu yokuncamathelisa isetyenziselwa ukutywinwa kokufuma okuphezulu, iziphene zokwaleka ezibangelwa yinkqubo (ii-micropores, iintanda, i-fiber wicking) zihlala zibuthathaka obukhulu besakhono somqobo. Ukutywinwa okuthembekileyo kwenziwa ngonyango loxinaniso olubandakanya ukugquma kwemigangatho emininzi kunye nokuguqulwa kwesihluzi . Iteyiphu ehlanganisiweyo ye-PTFE isebenza njengesithintelo esinemisebenzi emininzi enokuthenjwa phantsi kweemeko ezinzima ezifuna ukumelana nobushushu obuphezulu, ukuxhathisa kwe-corrosion, ukuzinza komswakama, kunye nokusebenza kokukhutshwa okungeyona intonga ngaxeshanye - kodwa kungekhona njengesithintelo esizimeleyo se-ultra-high njenge-foil yensimbi okanye i-PVDC.
Ushwankathelo , ipropathi yothintelo lomphunga wamanzi ye-PTFE yeteyiphu encamathelayo ayimiselwanga yi-PTFE's hydrophobicity yodwa. I-PTFE yangaphakathi ngumqobo ophakathi (WVTR 5-10 g/m²·usuku lwefilimu engenasiphako). Nangona kunjalo, iiteyiphu ezisebenzayo zinengxaki yemicropores, microcracks (ukusuka kwi-thermal expansion mismatch nefiberglass), kunye nefiber wicking - ukunyusa iWVTR ukuya kwi50-200 g/m²·day.
Ukufezekisa i-WVTR ephantsi (<15 g/m²· imini), cacisa i-coat multi-layer (i-3+ impregnation passes) kunye / okanye ukulungiswa kwe-lamellar filler (10-20 wt% mica okanye iiflakes zeglasi). Isiphumo se-labyrinth esivela kwizigcwalisi sinyanzela umphunga wamanzi ukuba uthathe iindlela ezijikajikayo, unciphisa kakhulu usulelo. Nangona kunjalo, ukulayishwa kwefayili ephezulu kunokunciphisa ukuguquguquka kunye nokusebenza okungabambekiyo - ibhalansi iyafuneka.
Ngaba ufuna iteyiphu encamathelayo ye-WVTR PTFE ephantsi yokutywinwa okungenwa kukufuma? I-Aokai PTFE inikezela ngamabakala amaninzi adityanisiweyo kunye namanqaku ahlaziyiweyo kunye nedatha yovavanyo ye-WVTR ebhaliweyo. Qhagamshelana nathi nge-WVTR yakho efunekayo, ubushushu bokusebenza, kunye neemfuno zokuguquguquka.
Umxholo unikezwe ngu I-Jiangsu Aokai yeZixhobo eziNtsha zeTekhnoloji Co., Ltd.
Ukuba ufuna iiparitha zobugcisa ezineenkcukacha, isikhokelo sosetyenziso, kunye nezisombululo ezilungiselelwe ipotifoliyo yethu epheleleyo yemveliso kubandakanya i-PTFE ilaphu elinobushushu obuphezulu, i-PTFE iteyiphu yokuncamathela enobushushu obuphezulu, ibhanti lokuhambisa umnatha we-PTFE, ibhanti le-fuser elingenamthungo, ilaphu le-PTFE elinecala elinye, i-high-temperature resistant belt , nceda uqhagamshelane nathi nge-fiberglass.
Ukuxhasa ifilosofi yoshishino yobungcali kunye nemfezeko, sizinikela ekuboneleleni ngezisombululo ezilungelelanisiweyo kunye nenkonzo yomthengi ecingayo.
