I-Polytetrafluoroethylene (PTFE), eyaziwa ngokuzinza kwayo okugqwesileyo kweekhemikhali, ukumelana nobushushu obuphezulu/obuphantsi, kunye ne-coefficient ephantsi yokungqubana, ifumene igama lesidlaliso elithi "Plastic King" kwaye isetyenziswa kakhulu kumashishini eekhemikhali, oomatshini, kunye ne-elektroniki. Nangona kunjalo, i-PTFE ecocekileyo ineengxaki zayo ezifana namandla aphantsi oomatshini, ukuthambekela ekuguqukeni kokuhamba komoya okubandayo, kunye nokuqhuba kakubi kobushushu. Ukuze koyiswe le mida, kuye kwaphuhliswa ii-composites ze-PTFE eziqinisiweyo zefayibha yeglasi. Ezi zinto ziphucula kakhulu iimetrikhi ezininzi zokusebenza ngelixa zigcina iipropati eziphezulu ze-PTFE, ngenxa yesiphumo sokuqinisa iifayibha zeglasi.
1. Uphuculo Olubalulekileyo Lweempawu Zoomatshini
Ulwakhiwo lwetsheyini yeemolekyuli ezilinganayo kakhulu kunye nekristali ephezulu ye-PTFE ecocekileyo kuphumela kumandla abuthathaka phakathi kweemolekyuli, okukhokelela kumandla aphantsi oomatshini kunye nobunzima. Oku kuyenza ithambekele ekuguqukeni phantsi kwamandla angaphandle abalulekileyo, okunciphisa ukusetyenziswa kwayo kwiindawo ezifuna amandla aphezulu. Ukufakwa kweefayibha zeglasi kuzisa uphuculo olukhulu kwiimpawu zoomatshini ze-PTFE. Iifayibha zeglasi zibonakaliswa ngamandla azo aphezulu kunye ne-modulus ephezulu. Xa zisasazwa ngokulinganayo kwi-PTFE matrix, zithwala ngempumelelo imithwalo yangaphandle, ziphucula ukusebenza koomatshini ngokubanzi kwe-composite. Uphando lubonisa ukuba ngokongezwa kwesixa esifanelekileyo sefayibha yeglasi, amandla okuxinana e-PTFE anokwandiswa ngokuphindwe ka-1 ukuya ku-2, kwaye amandla okuguquguquka aba yinto ephawulekayo nangakumbi, ephucuka malunga namaxesha ama-2 ukuya kwama-3 xa kuthelekiswa nezinto zokuqala. Ubunzima bukwanda kakhulu. Oku kuvumela i-PTFE eqinisiweyo yefayibha yeglasi ukuba isebenze ngokuthembekileyo kwiindawo zokusebenza ezinzima ngakumbi kwimveliso yoomatshini nakwi-aerospace, njengezitywino zoomatshini kunye nezinto zokuthwala, kunciphisa ngempumelelo ukusilela okubangelwa ngamandla angonelanga ezinto.
2. Ukusebenza kakuhle kweThermal
Nangona i-PTFE ecocekileyo isebenza kakuhle kubushushu obuphezulu nobuphantsi, ikwazi ukusetyenziswa ixesha elide phakathi kwe--196°C kunye ne-260°C, uzinzo lwayo lobukhulu alukho kakuhle kubushushu obuphezulu, apho ithambekele ekuguqukeni kobushushu. Ukongezwa kweefayibha zeglasi kujongana ngempumelelo nale ngxaki ngokunyusa ubushushu bokujika kobushushu bezinto (HDT) kunye nozinzo lobukhulu. Iifayibha zeglasi ngokwazo zinokumelana nobushushu obuphezulu kunye nokuqina. Kwiindawo zobushushu obuphezulu, zithintela intshukumo yeetsheyini zeemolekyuli ze-PTFE, ngaloo ndlela zithintela ukwanda kobushushu kunye nokuguquka kwezinto. Ngomxholo wefayibha yeglasi ofanelekileyo, ubushushu bokujika kobushushu be-PTFE eqinisiweyo yefayibha yeglasi bunokwandiswa ngaphezulu kwe-50°C. Igcina imo ezinzileyo kunye nokuchaneka kobukhulu phantsi kweemeko zokusebenza zobushushu obuphezulu, okwenza ukuba ifaneleke kwizicelo ezineemfuno eziphezulu zozinzo lobushushu, njengemibhobho yobushushu obuphezulu kunye neegaskets zokuvala zobushushu obuphezulu.
3. Ukuthambekela Kokuhla Kokuqubha Okunciphileyo
Ukuhamba komoya obandayo (okanye ukuqhekeka) yingxaki ephawulekayo kwi-PTFE ecocekileyo. Ibhekisa ekuguqulweni kancinci kweplastiki okwenzeka phantsi komthwalo oqhubekayo ngokuhamba kwexesha, nokuba kumaqondo obushushu aphantsi. Olu phawu luthintela ukusetyenziswa kwe-PTFE ecocekileyo kwizicelo ezifuna imo yexesha elide kunye nokuzinza komlinganiselo. Ukufakwa kweefayibha zeglasi kuthintela ngempumelelo isiganeko sokuhamba komoya obandayo se-PTFE. Iifayibha zisebenza njengeskeleton esixhasayo ngaphakathi kwe-PTFE matrix, zithintela ukutyibilika kunye nokuhlelwa kwakhona kwee-PTFE molecular chains. Idatha yovavanyo ibonisa ukuba izinga lokuhamba komoya obandayo we-PTFE eqinisiweyo yefayibha yeglasi lincitshisiwe ngama-70% ukuya kuma-80% xa kuthelekiswa ne-PTFE ecocekileyo, nto leyo ephucula kakhulu uzinzo lomlinganiselo wezinto eziphantsi komthwalo wexesha elide. Oku kuyenza ifaneleke ukuvelisa iindawo zoomatshini ezichanekileyo kakhulu kunye nezinto zokwakha.
4. Ukuphucula Ukumelana Nokunxiba
I-coefficient ephantsi yokungqubana kwe-PTFE ecocekileyo yenye yeenzuzo zayo, kodwa ikwanegalelo ekungagugini kwayo kakuhle, okwenza ukuba iguge kwaye idluliselwe ngexesha leenkqubo zokungqubana. I-PTFE eqinisiweyo yefayibha yeglasi iphucula ubulukhuni bomphezulu kunye nokuxhathisa ukuguguleka kwezinto ngokusebenzisa isiphumo sokuqinisa iifayibha. Ubulukhuni befayibha yeglasi buphezulu kakhulu kunobo be-PTFE, okwenza ukuba ikwazi ukumelana ngempumelelo nokuguguleka ngexesha lokungqubana. Ikwatshintsha indlela yokungqubana kunye nokuguguleka kwezinto, inciphise ukuguguleka okunamathelayo kunye nokuguguleka okurhabaxa kwe-PTFE. Ngaphezu koko, iifayibha zeglasi zinokwenza iiprotrusions ezincinci kumphezulu wokungqubana, zibonelela ngesiphumo esithile sokulwa nokungqubana kwaye zinciphise ukuguquguquka kwe-coefficient yokungqubana. Kwizicelo ezisebenzayo, xa zisetyenziswa njengezinto zokungqubana ezifana neebheringi ezityibilikayo kunye neeringi zepiston, ubomi benkonzo ye-PTFE eqinisiweyo yefayibha yeglasi buyandiswa kakhulu, mhlawumbi ngamaxesha aliqela okanye kwanamaxesha amaninzi xa kuthelekiswa ne-PTFE ecocekileyo. Izifundo zibonise ukuba ukumelana nokuguguleka kwee-PTFE composites ezizaliswe yifayibha yeglasi kunokuphuculwa phantse amaxesha angama-500 xa kuthelekiswa nezinto zePTFE ezingazaliswanga, kwaye ixabiso le-PV elilinganiselweyo linyuswa malunga namaxesha ali-10.
5. Ukuqhuba Okuphuculweyo Kobushushu
I-PTFE ecocekileyo ine-conductivity ephantsi yobushushu, engayilungelanga ukudluliselwa kobushushu kwaye ibeka imida kwizicelo ezineemfuno eziphezulu zokusasazwa kobushushu. I-fiber yeglasi ine-conductivity ephezulu yobushushu, kwaye ukongezwa kwayo kwi-PTFE, ngandlela ithile, kunokuphucula ukuhanjiswa kobushushu bezinto. Nangona ukongezwa kwe-fiber yeglasi kungayonyusi kakhulu i-coefficient yokuhanjiswa kobushushu ye-PTFE, inokwenza iindlela zokuhambisa ubushushu ngaphakathi kwezinto, ikhawulezise isantya sokudluliselwa kobushushu. Oku kunika i-PTFE yefayibha yeglasi eqinisiweyo amandla okusetyenziswa ngcono kwiindawo ze-elektroniki nezombane, njengakwii-thermal pads kunye ne-circuits board board, okunceda ukujongana nemiba yokuqokelelwa kobushushu enxulumene nokuhanjiswa kobushushu okubi kwe-PTFE ecocekileyo. Ukuhanjiswa kobushushu okuphuculweyo kukwanceda ekutshabalaliseni ubushushu oburhabaxa kwizicelo ezifana neebheringi, okufaka isandla ekusebenzeni ngcono.
Ububanzi bokusetyenziswa: Le nto idibeneyo isetyenziswa kakhulu kwiitywina zemizi-mveliso, iibheringi/iibhushingi ezinomthwalo omninzi, izixhobo ze-semiconductor, kunye neendawo ezahlukeneyo zesakhiwo ezingagugiyo kushishino lweekhemikhali. Kwicandelo le-elektroniki, isetyenziswa ekwenzeni ii-gaskets zokukhusela izinto ze-elektroniki, ukhuseleko lweebhodi zesekethe, kunye neempawu ezahlukeneyo zokukhusela. Ukusebenza kwayo kwandiswa ngakumbi kwicandelo leenqwelo-moya ukuze kubekho iileya zokukhusela eziguquguqukayo.
Qaphela ngeMida: Nangona i-glass fiber iphucula kakhulu iipropati ezininzi, kubalulekile ukuqaphela ukuba njengoko umxholo we-glass fiber usanda, amandla okuxinana, ukunwebeka, kunye nokuqina kwe-composite kunokuncipha, kwaye i-friction coefficient inokunyuka kancinci. Ngaphezu koko, i-glass fiber kunye ne-PTFE composites azifanelekanga ukusetyenziswa kwi-alkaline media. Ke ngoko, ifomyula, kubandakanya ipesenti ye-glass fiber (ngesiqhelo yi-15-25%) kunye nokudibanisa okunokwenzeka nezinye izizalisi ezifana ne-graphite okanye i-MoS2, yenzelwe ukuhlangabezana neemfuno ezithile zesicelo.
Ixesha leposi: Disemba-05-2025