1.Ukwenza i-TFE
2.Ukumiswa kwePolymerization
3.I-Dispersion polymerization
Ukwenza i-TFE
1 Abavelisi be-PTFE baqala ngokwenza i-TFE.Izithako ezintathu ze-TFE, i-fluorspar, i-hydrofluoric acid, kunye ne-chloroform zidityanisiwe kwigumbi lokusabela kweekhemikhali ezishushu phakathi kwe-1094-1652 ° F (590-900 ° C).Irhasi yesiphumo ke ipholisiwe, kwaye idilizwe ukuze kususwe nakuphi na ukungcola.
Ukumiswa kwePolymerization
I-2 Igumbi lokuphendula lizaliswe ngamanzi ahlambulukileyo kunye ne-agent agent okanye i-initiator, ikhemikhali eya kumisa ukubunjwa kwepolymer.Ulwelo lwe-TFE lufakwa kumbhobho kwigumbi lokusabela.Njengoko i-TFE idibana nomqalisi, iqala ukwenza iipolymerize.Isiphumo se-PTFE senza iinkozo eziqinileyo ezidada phezu kwamanzi.Njengoko oku kusenzeka, igumbi lokusabela liyashukunyiswa ngoomatshini.Ukusabela kweekhemikhali ngaphakathi kwegumbi kunika ubushushu, ngoko ke igumbi lipholiswa ngokujikeleza kwamanzi abandayo okanye esinye isisipholisi kwibhatyi ejikeleze umphandle walo.Ulawulo luvala ngokuzenzekelayo unikezelo lwe-TFE emva kokuba ubunzima obuthile ngaphakathi kwegumbi bufikelelwe.Amanzi ayakhutshelwa ngaphandle kwegumbi, eshiya ubugxwayiba beentambo ze-PTFE ezikhangeleka ngathi zikhokhonathi egratiwe.
3 Okulandelayo, i-PTFE iyomiswa ize ityiswe kwilitye lokusila.Ilitye lokusila licola i-PTFE ngamacangca ajikelezayo, ivelisa imathiriyeli ehambelana nomgubo wengqolowa.Lo mgubo ucolekileyo kunzima ukuwubumba.“Inokuhamba kakubi,” okuthetha ukuba ayinakwenziwa lula kwisixhobo esizenzekelayo.Njengomgubo wengqolowa ongahluzwanga, usenokuba namagaqa kunye neepokotho zomoya.Ke abavelisi baguqula lo mgubo ocolekileyo ube ziigranuli ezinkulu ngenkqubo ebizwa ngokuba yi-agglomeration.Oku kunokwenziwa ngeendlela ezininzi.Enye indlela kukuxuba i-PTFE powder kunye ne-solvent efana ne-acetone kwaye uyiwise kwi-drum ejikelezayo.Iinkozo ze-PTFE zinamathelana, zenza iipellets ezincinci.Emva koko iipellet zomiswa kwi-oven.
4 Iipellets ze-PTFE zinokubunjwa zibe ngamacandelo kusetyenziswa iindlela ezahlukeneyo zobuchule.Nangona kunjalo, i-PTFE inokuthengiswa ngesambuku esele ibunjwe ngaphambili kwizinto ezibizwa ngokuba ziibhilethi, ezizisilinda eziqinileyo ze-PTFE.Iibhilithi zinokuba yi-5 ft (1.5 m) ubude.Ezi zinokunqunyulwa zibe ngamashiti okanye iibhloko ezincinci, ukwenzela ukubumba ngakumbi.Ukwenza i-billet, iipellets ze-PTFE zigalelwa kwi-cylindrical stainless steel mold.Umngundo ulayishwa kumatshini wokucofa amanzi, into efana nekhabhathi enkulu exhotyiswe ngenkunzi yegusha enobunzima.Inkunzi yegusha iwela ezantsi kubumba kwaye isebenzise amandla kwi-PTFE.Emva kwexesha elithile, ukungunda kuyasuswa kushicilelo kwaye i-PTFE ayibunjwanga.Ivunyelwe ukuba iphumle, emva koko ifakwe kwi-oven inyathelo lokugqibela elibizwa ngokuba yi-sintering.
5 I-PTFE ebunjiweyo ifudunyezwa kwi-oveni yokutshisa iiyure ezininzi, ide ifikelele kubushushu obujikeleze 680°F (360°C).Oku kungaphezulu kwendawo yokunyibilika ye-PTFE.Amasuntswana e-PTFE ayadibana kwaye izinto ziba njengejeli.Emva koko i-PTFE ipholiswa kancinci kancinci.I-billet egqityiweyo ingathunyelwa kubathengi, abaza kuqhekeza okanye bawuchebe kwiincinci ezincinci, ukuze baqhubekele phambili.
Ukusasazwa kwepolymerization
6 I-Polymerization ye-PTFE yindlela yokusasazwa ikhokelela nokuba ngumgubo ocolekileyo okanye into efana ne-paste, eluncedo kakhulu kwiingubo kunye nokugqitywa.I-TFE yaziswa kwi-reactor ezaliswe ngamanzi kunye nekhemikhali yokuqalisa.Esikhundleni sokushukunyiswa ngamandla, njengakwinkqubo yokunqunyanyiswa, igumbi lokuphendula liphazamiseka kuphela ngobumnene.I-PTFE ibumba amaso amancinane.Amanye amanzi ayasuswa, ngokucoca okanye ngokufaka imichiza ebangela ukuba amaso e-PTFE azinze.Isiphumo yinto ebisi ebizwa ngokuba yi-PTFE dispersion.Ingasetyenziswa njengolwelo, ngakumbi kwizicelo ezifana nokugqitywa kwelaphu.Okanye isenokomiswa ibe ngumgubo ocoliweyo osetyenziselwa ukugquma isinyithi
Ixesha lokuposa: Jan-19-2019