I-Jiangsu Aokai New Materials, umenzi oqeqeshiweyo we-PTFE ilaphu lobushushu obuphezulu, ucacisa ngokuvela kwesakhiwo sekristale se-PTFE kuyo yonke inkqubo ye-sintering ye-PTFE yelaphu lobushushu obuphezulu.
I. Ukutshatyalaliswa koLwakhiwo lweCrystalline yoqobo
1. PTFE crystalline morphology phambi sintering
Phambi kokuba sintering, PTFE ikhona njengoko saa amasuntswana emulsion ancanyatheliswe ilaphu fiberglass. Isuntswana ngalinye liqulethe i-lamellae egotyiweyo eyikristale kakhulu, eneekristale ezincinci ezicwangciswe kakuhle.
Emva kokuba iqondo lokushisa liphakame ngaphezu kwendawo yokunyibilika (~ 327 ° C), zonke iikristale ziyanyibilika ngokupheleleyo. Amatyathanga emolekyuli asongiweyo atyhila kwaye aqhawuke, aguquke abe yi-amorphous melt. Imida yamasuntswana yasekuqaleni iyanyamalala njengoko amasuntswana adibanisa kwisigaba esityhidiweyo esiqhubekayo, siqhekeza ngokupheleleyo isakhiwo sokuqala sekristale yegranular.
II. Recrystallization Ngexesha lokupholisa
Ekupholiseni ukusuka kwimeko etyhidiweyo, i-PTFE iphinda ihlaziye ngokukhawuleza ukuze yenze i-spherulites eyenziwe nge-radially oriented-folded-chain lamellae enwebeka ngaphandle ukusuka kwiindawo eziphambili ze-nucleation. Ezi spherulites ezidibeneyo zakha i-matrix ye-crystalline eqhubekayo, ithatha indawo yesakhiwo sokuqala esipakishweyo.
2. Ukwahluka kwi-crystallinity yokugqibela
I-PTFE ineempawu eziqinileyo, ezithe gqolo kakhulu zemolekyuli, inika amaxabiso ekristale akhawulezayo naphantsi kokupholisa okukhawulezileyo. I-crystallinity yokugqibela ngokubanzi isuka kwi-50% ukuya kwi-70%, iphantsi kancinci kuneengqungquthela ze-emulsion yasekuqaleni.
1. Ukugcinwa kwesigaba sekristale esizinzile
Emva kokupholisa kwiqondo lobushushu begumbi, i-PTFE igcina inkqubo yekristale enehexagonal ezinzileyo (igumbi lobushushu besigaba esinehexagonal), iyafana nefom yayo yekristale yangaphambili. Zonke iinguqu zesakhiwo zenzeka ngobukhulu bekristale, ukugqibelela kunye ne-morphology kunesigaba esiphezulu se-crystal.
2. Impembelelo yesantya sokupholisa kwimfezeko yekristale
· Ukupholisa okucothayo kuvelisa i-crystallinity ephezulu, i-spherulites emikhulu kunye ne-lamellae ecacileyo ngakumbi, ekhokelela kwiimveliso ezinobunzima obuphakamileyo kunye nobuninzi.
· Ukucima okukhawulezileyo kukhokelela kubukristale obusezantsi ngokwentelekiso, bucoleke ngakumbi, bube bunganeno obungagqibelelanga be-spherulites, kunye nokuphucuka kokuguquguquka kunye nokungafihli kwemathiriyeli egqityiweyo. Ukupholisa okucothayo kusemgangathweni we-PTFE welaphu lobushushu obuphezulu ukuhlangabezana neemfuno zamandla oomatshini.
IV. I-Interfacial Crystallization Effect kwi-Fiberglass kunye nokubaluleka ngokubanzi
1. Isenzeko seTranscrystallization
Xa i-PTFE inyibilika ipholisa kumphezulu we-fiberglass, iisayithi ezishinyeneyo ze-nucleation kumphezulu wefiber zibangela ukuba i-transcrystallization: i-columnar crystal layer ikhula ngokuthe ngqo kwi-axis yefiber, ngokwahlukileyo ngokucacileyo kwi-spherulite morphology ngaphakathi kwe-coating yobuninzi.
2. Ubume be-gradient ukusuka kwi-fiber interface ukuya kwi-coating bulk
Phantsi kwempembelelo ye-fiberglass, i-PTFE crystalline structure yenza i-gradient transition: umaleko we-transcrystalline okufutshane neentsinga ngokuthe ngcembe utshintshela kwizakhiwo ze-spherulitic kwi-matrix yokwambathisa yangaphakathi.
I-Sintering iguqula iikristale ze-PTFE ezigoqiweyo zegranular: ziyanyibilika kunye nokuqhekeka kwesakhiwo, emva koko ziphinde ziqaqambe zibe zii-spherulites eziqhubekayo, ezishinyeneyo (ezinezaleko ze-interfacial transcrystalline). Oku kuguqula amasuntswana epowder apakishwe ngokukhululekileyo abe yifilim eqhubekayo, eyona nto iyimfuneko ebalulekileyo yokwambathisa ukuhambisa ukusebenza okubanzi okubandakanya ukumelana nobushushu, ukukhuhlana okuphantsi, ipropathi engabambekiyo kunye nokumelana nokugqwala kweekhemikhali.
Lo mxholo wobugcisa ungentla unikwe ngu I-Jiangsu Aokai yeZixhobo eziNtsha zeTekhnoloji Co., Ltd.
Ukuba unqwenela ukufumana iinkcukacha ezicacileyo, iimeko zesicelo kunye nezisombululo ezilungiselelwe ipotifoliyo yethu epheleleyo kubandakanya i-PTFE ilaphu elinobushushu obuphezulu, i-PTFE iteyiphu encamathelayo yobushushu obuphezulu, i-PTFE high-temperature mesh belt, ibhanti lokucinezela ubushushu obungenamthungo, ilaphu le-PTFE elinamacala elinye, ubushushu obuphezulu obunganyangekiyo kunye ne-fiberglass ekwazi ukumelana nobushushu
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