Nini Iteyiphu encamathelayo ye-PTFE isetyenziselwa ukutywina amacandelo abona ukufuma-njengeentsimbi zombane, iiflange ze-HVAC, okanye izivalo zesikhongozeli sekhemikhali – ingcinga eqhelekileyo kukuba 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 losasazo lomphunga wamanzi (WVTR) lweteyiphu ye-PTFE ixhomekeke kancinane kwikhemistri ye-PTFE nangaphezulu kwisakhiwo sokugquma – iziphene ezifana ne-micropores, microcracks, kunye ne-fiber 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. |
Ikristale ephezulu (>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 ze-inert flaky (i-mica powder, iiflakes zeglasi) zixutywe kwiingubo ze-PTFE ukunyanzela iimolekyuli zamanzi ukuba zithathe ujiko olujikajikayo (impembelelo yelabyrinth) |
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 i-coating ine-angle yoqhagamshelwano lwamanzi aphezulu (ngokuqhelekileyo i-110-120 °), inqanda ukubunjwa kwefilimu yamanzi eqhubekayo 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 sayo 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, ukuchasana nokugqwala, ukuzinza komswakama, kunye nokukhutshwa kokusebenza okungeyona intonga ngaxeshanye - kodwa hayi njengesithintelo esizimeleyo esine-ultra-high njengefoyile yentsimbi 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 zithwaxwa yimicropores, 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 iteyipu yokuncamathelisa enobushushu obuphezulu, i-PTFE i-mesh conveyor belt, 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 zokumisa kunye kunye nenkonzo yomthengi ecingayo.
