I-PTFE sisixhobo esiluncedo kakhulu kuba indibaniselwano eyodwa yeepropathi.I-PTFE i-inert ye-chemically inert, i-weatherable, i-insulation egqwesileyo yombane, ukumelana nobushushu obuphezulu, i-coefficient ephantsi ye-friction kunye ne-non-adhesive properties.Iityhubhu ezishwabeneyo zikwasetyenziswa njengezigqumathelo kunye nokukhusela iindawo zombane okanye iinxalenye zombane.I-PTFE inokukhutshelwa okanye ikhutshelwe kwiiteyiphu kunye neefilimu ezinokuthi zisetyenziswe kwiitywina kunye nemathiriyeli ye-gasket.i-polymer ligama lorhwebo eliqhelekileyo le-polytetrafluoroethylene (PTFE) elenziwe.
Isiqhelo sawo onke amabakala e-Polymer PTFE (i-polytetrafluoroethylene) i-polytetrafluoroethylene powders, inokuthi ifakwe i-lubricated kwaye ikhutshwe nge-standard paste extrusion techniques.Xa kuthelekiswa namanye amabakala e-PTFE umgubo ocolekileyo, i-polymer PTFE yintlaka ethe yandisa amandla anyibilikayo kunye nokuncipha okuncinci.Yenye yezona zinto zihambelanayo kwaye kulula ukuzisebenzisa.Eyona nto ifanelekileyo kwiimveliso ezine-medium-to-high reductionratio extrusions.
Iimveliso ezicutshungulwe ngokufanelekileyo ezenziwe kwi-polymer ecocekileyo ye-PTFE zibonelela ngeempawu eziphezulu eziqhelekileyo ze-fluoropolymer resins: ukugcinwa kweepropati emva kwenkonzo kwi-260 ° C (500 ° F), iipropati eziluncedo kwi- -240 ° C (-400 ° F), ukunganyangeki kweekhemikhali ukuya phantse zonke iikhemikhali zamashishini kunye nezinyibilikisi, kunye nokukhuhlana okuphantsi kunye nemiphezulu ye-antistick.Iimpawu zeDielectric zibalaseleyo kwaye zizinzile ngokuphindaphindiweyo kunye nobushushu.Iimveliso zinokuqina okuphakathi kunye nobude obuphezulu. Kwimeko yomlilo, iimveliso ze-polymer PTFE zixhathisa ukuvutha kwaye azikhuthazi ukusasazeka kwedangatye.Xa betshiswa ngamadangatye avela kweminye imithombo, igalelo labo lobushushu lincinci kwaye nomsi omncinci kakhulu.
ipolymer PTFE ilungiselelwe i-extrusion ngokuxuba kunye noncedo lwe-extrusion elulwelo.I-powder emanzi ixinzelelwe kwi-cylindrical preform slug kwaye ifakwe kwi-cylinder ye-ram-type extruder.Ngaphantsi koxinzelelo oluphezulu, ukubunjwa kunyanzeliswa ngokufa kokugqiba ukuvelisa i-beading, i-tubing, okanye i-coatings.Izinto ezingafaniyo, ezifana nocingo lwetsimbi okanye i-high-temperature fibers, zinokugqunywa ngokuzondla nge-axis ye-barrel extruder.Emva kwe-extrusion, imveliso iphantsi, kodwa ihambelana, isakhiwo se-fibrous.i-polymer PTFE 640 idla ngokuqhutyelwa phambili, kunye nobushushu, ibe yimveliso ye-resin eqinileyo, efana ne-tubing.Heat isetyenziswe ngamanyathelo amabini, anokuthi aqhutywe emgceni kunye ne-extrusion okanye ngokwahlukileyo.I-lubricant kufuneka isuswe kuqala, ngokuqhelekileyo ngokufudumeza ngaphakathi koluhlu lwe-100-300 ° C (212-572 ° F).Inyathelo le-sintering lilandelayo ukunyibilikisa i-resin enyulu ngaphezu kwendawo yayo yokunyibilika eyikristale emalunga ne-342°C (648°F) kwaye ivelise i-void-free, i-stress-free, kunye nemveliso eqinileyo ye-PTFE resin.Xa kwenziwa kumgca, amanyathelo okufudumeza amisela umlinganiselo wesantya esiphezulu.yiparameter ye-extrusion echaphazela ukhetho lwebakala le-resin.
Ixesha lokuposa: May-04-2018