I. Ummiselo ochanekileyo wezinga lokupholisa
Abavelisi belaphu lobushushu obuphezulu beTeflon babonisa ukuba ukulawulwa kwezinga lokupholisa yeyona ndlela ichanekileyo nesebenzayo yokulawula ubukhazikhazi. Emva kokuba i-PTFE inyibilike ngokupheleleyo ngaphezu kwe-380 ° C, amatsheyina emolekyuli alungelelaniswa kwiilethi zekristale xa udlula kuluhlu lweqondo lobushushu lekristale eliphakamileyo le-310 ~ 315 ° C ngexesha lokupholisa. Izinga lokupholisa limisela umlinganiselo wengingqi yekristale kunye ne-microscopic morphology yokwambathisa.
1. Ukupholisa ngokukhawuleza (ukucima) kwi-crystallinity ephantsi
Umphezulu welaphu elinesinki upholiswa ngokukhawuleza ngeekhethini zomoya obandayo, iirola zokupholisa okanye iitanki zamanzi ezinobushushu obuqhelekileyo. Amatyathanga eemolekyuli aqanduselwa phambi kolungelelwaniso oluqhelekileyo nolucwangcisiweyo, lwenza inani elikhulu leenkozo zekristale ezincinci nezingafezekanga. I-coating efunyenweyo ibonakalisa ukuthungwa okuthambileyo kunye nokuqina okugqwesileyo kunye nokusebenza kakuhle okungeyona intonga, ngelixa ukuqina kwayo kunye nokumelana nokunxiba kuyancitshiswa kancinane.
2. Ukupholisa okucothayo (i-annealing) ukwenzela i-crystallinity ephezulu
Icandelo lokugcinwa kobushushu licwangciswe kwindawo yokuphuma kwesithando somlilo, okanye ilaphu lipholisiwe ngesithando somlilo ngesantya esicotha kakhulu se-10 ~ 50 ° C / h. Oku kuvumela intshukumo eyaneleyo yamatyathanga eemolekyuli ukuba enze ii-spherulites ezinkulu nezipheleleyo. I-coating iqhayisa ngobulukhuni obuphezulu, ukuxhathisa okubalaseleyo kunye nokuzinza kwe-dimensional, kodwa ngokunciphisa ukuguquguquka kunye nokunyuka kwe-brittleness.
II. Inkqubo eNcedisayo kunye noLawulo lwezinto eziphathekayo
Kwisiseko solawulo lwezinga lokupholisa, la manyathelo alandelayo ancedisayo anokuqhubela phambili ukulungiswa kakuhle kwe-crystallinity ye-PTFE coating.
1. Ubushushu be-Sintering kunye nexesha lokubamba
Izinto eziphathekayo kufuneka zitshiswe kwi-380 ~ 400 ° C kwaye zigcinwe ixesha elaneleyo lokunyibilikisa ngokupheleleyo iikristale zangaphambili kunye nokuphelisa imbali ye-thermal. I-sintering engafanelekanga iya kushiya i-crystal nuclei eyintsalela, ekhokelela ekuphakameni ngokugqithisileyo kunye nokusabalalisa ngokulinganayo kokugqibela kwekristale.
2. Ukukhutshwa emva konyango
Kwiingubo ezine-crystallinity ephantsi efunyenwe ngokupholisa ngokukhawuleza, ukukhula kwekristale yesibini kunye nokupheliswa koxinzelelo lwangaphakathi kunokuqondwa ngokunyangwa kweqondo lokushisa rhoqo kwi-300 ~ 320 ° C kwiiyure ezininzi ezilandelwa ukupholisa okucothayo, okwandisa ngokulinganayo i-crystallinity yokwambathisa.
3. Ubunzima bemolekyuli ekrwada
Ubukhulu be-molecular-weight PTFE dispersion features high melt viscosity kunye ne-low molecular chain chain, ekhokelela kumlinganiselo ocothayo wecrystallization. Ngaphantsi kweemeko zokupholisa ezifanayo, kulula ukulungiselela iingubo kunye ne-crystallinity ephantsi.
4. Ukongezwa kwe-agent ye-nucleant
Idosi encinci (0.1% ~ 1%) ye-inorganic fillers okanye i-perfluorinated copolymers inokubonelela ngenani elikhulu le-heterogeneous crystal nuclei kunye nokucokisa kakhulu iinkozo zekristale. Nangona ingenakutshintsha kakhulu icrystallinity iyonke, yenza ngokufanelekileyo i-crystal microstructure.
III. Ulawulo oluBanzi lweMveliso yoMaleko oMninzi
Ilaphu leTeflon elinobushushu obuphezulu liveliswa ziinkqubo ezininzi zokungena kunye ne-sintering kunye neengubo eziqokelelweyo ngokuthe ngcembe, ezifuna ukulawulwa kwenkqubo ekujoliswe kuyo ngolu hlobo lulandelayo.
1. I-Interlayer crystallization consistency
Umahluko omkhulu ngokugqithisileyo kwireyithi yokupholisa phakathi kweeleya kuya kubangela ukungangqinelani kwekristale ye-interlayer kwaye kuvelise uxinzelelo lwangaphakathi, kude kukhokhelele kwi-coating peeling kwiimeko ezinzima. Kuyacetyiswa ukuba kuthathwe ukupholisa okuthambileyo kumaleya aphakathi, kwaye kuphunyezwe ukupholisa okujoliswe kuko ngokukhawuleza okanye okucothayo kuphela kumaleko angaphandle ngokweemfuno zemveliso.
2. Isiphumo sokutyabeka
Iingubo ezityebileyo zinengxaki yokuphola kwe-asynchronous phakathi komphezulu kunye nomaleko wangaphakathi. Umaleko wangaphakathi uthande ukwenza ubukhazikhazi obuphezulu ngenxa yokucotha kokutshatyalaliswa kobushushu. Kuyimfuneko ukuba kwandiswe ngokufanelekileyo ixesha le-sintering ukuqinisekisa ubushushu obufanayo bengubo yonke ngaphambi kokuphumeza iinkqubo zokupholisa ezidibeneyo.
3. Ukuhambelana koxinzelelo ngexesha lokupholisa
Uxinzelelo olusetyenziswa kumphezulu welaphu ngexesha lecandelo lokupholisa lichaphazela ukuqhelaniswa kwamatyathanga eemolekyuli, apho izibini ezinenkqubo yecrystallization kwaye ngokudibeneyo imisela i-crystal morphology yokugqibela kunye nokuzinza komda. Ulawulo olulungelelanisiweyo noluchanekileyo lunyanzelekile.
IV. Ukufunyanwa kobungakanani beCrystallinity
I-Differential Scanning Calorimetry (DSC) kufuneka yamkelwe ukuze kungqinwe ikristale emva kohlengahlengiso lwenkqubo. Isampula ye-5 ~ 10mg yokugqoka ishushu kwizinga le-10 ° C / min ukuvavanya i-enthalpy enyibilikayo. I-crystallinity ibalwa ngokwahlula i-enthalpy enyibilikayo evavanyiweyo nge-enthalpy ye-thiyori enyibilikayo ye-100% ye-crystalline PTFE (malunga ne-82J / g). Idityaniswe nokuchasa ukugoba, ukumelana nokunxiba kunye nezinye iimvavanyo zokusebenza, eyona nkqubo ilungileyo yefestile inokumiselwa.
Imigaqo yokuSebenza ngokuBanzi : Ukufumana i-crystallinity ephantsi, sebenzisa ukucima ngokukhawuleza emva kokucima ngokupheleleyo; ukufumana ubukhazikhazi obuphezulu, gcina ubushushu obungaguqukiyo busondele kuma-310°C kulandele ukupholisa okucothayo emva kokuntywila ngokupheleleyo.
Lo mxholo wobugcisa ungentla unikwe ngu IJiangsu Aokai yeTekhnoloji eNtsha yeTekhnoloji Co., Ltd.
Ukufumana ulwazi olunzulu malunga neeparitha ezineenkcukacha, iimeko zesicelo kunye nezisombululo ezilungelelanisiweyo zoluhlu olupheleleyo lweemveliso ezibandakanya ubushushu obuphezulu belaphu leTeflon, iTeflon iteyiphu encamathelayo yobushushu obuphezulu, iTeflon yebhanti enobushushu obuphezulu, ibhanti lomatshini wokubopha umthungo, ilaphu lePTFE elinamacala elinye, ilaphu le-PTFE elinecala elinye, i-fiberglass enganyangekiyo, ubushushu obuphezulu beglasi uzive ukhululekile ukudibana nathi kwi-intanethi okanye uqhagamshelane nenkonzo yethu yomnxeba.
Umnxeba weNkonzo :
UMnu Guo: +86 18944819998
UMnu Liu: +86 13705266308
Ukubambelela kwifilosofi yenkonzo yobungcali kunye nengqibelelo, sizibophelele ekuboneleleni ngezisombululo zokuphela konyaka kunye neenkonzo ezinolwazelelelo kubo bonke abathengi!
