I-Polytetrafluoroethylene okanye i-PTFE (eyaziwa kakhulu njenge-polymer) yi-fluoropolymer yeplastiki eguquguqukayo ngokukhethekileyo yophondo lwendlovu olumhlophe kunye ne-opaque yeplastiki;yenziwe yi-free-radical polymerisation yeemolekyuli ezininzi ze-tetrafluoroethene, kwaye ifanelekile kuluhlu olubanzi lwezicelo kumashishini ahlukeneyo njenge-aerospace, ishishini lokutya nokusela, i-pharmaceuticals kunye ne-telecoms.
Iveliswe yi-AFT Fluorotec kwiintonga okanye iibhubhu zaso naziphi na ubukhulu, okanye zizaliswe ngeglasi, i-carbon, insimbi engenasici okanye ezinye izinto ezininzi zokunyusa ukuchasana nokunxiba kunye namandla, nokuba yintoni iprojekthi okanye ukwakha, siqinisekile ukuba sinezinto eziza kusebenza kuwe. .
IIPROPATI EZIPHAMBILI ZE-PTFEUkuba ubuzama ukuyila imathiriyeli ebhetyebhetye kakhulu, ekwaziyo ukumelana neekhemikhali, ukumelana ne-thermal, non-stick kunye nombane onganyangekiyo ngumbane, kwaye ibingekenziwa, ubuya nethemba lokuba unokuza nento enye kwenye indawo. iphantse ilunge njenge-PTFE kwezi ndawo.
Iqondo lokunyibilika le-PTFE lijikeleze i-327°C, kwaye i-PTFE esulungekileyo iphantse ibe yi-inert ngokupheleleyo yekhemikhali, ayinyibiliki kakhulu kwizinyibilikisi ezininzi okanye iikhemikhali, kwaye izinzile ngokwethermal ngokwaneleyo ukuba isetyenziswe phakathi kwe -200 degrees C kunye +260 degrees C ngaphandle kokuthotywa.
Ezinye iipropathi eziluncedo ze-PTFE ngamandla ayo aphezulu aguquguqukayo, nakwiqondo lobushushu eliphantsi, ukuxhathisa kombane okuphezulu kunye namandla e-dielectric, ukumelana namanzi (ngenxa ye-electronegativity ephezulu ye-fluorine), kunye ne-coefficient ephantsi yokukhuhlana.Uxinzelelo lwe-PTFE luphezulu kakhulu, kuma-2200 kg/m3.
Ngapha koko, ngaphaya kokusabela kwezinye ii-agent zekhemikhali kunye nezinyibilikisi (umzekelo, i-chlorine trifluoride, i-cobalt(III) i-fluoride, i-xenon difluoride okanye i-fluorine yokuqala ukuba kuxinzelelo oluphezulu kunye nobushushu), eyona nto kuphela ekufuneka ithathelwe ingqalelo xa usebenzisa i-PTFE ukuba ayinakuxhathisa okulungileyo kwimitha yamandla aphezulu, okuya kubangela ukophuka kwemolekyuli ye-PTFE.
IIPROPERTIESI EGUQIWEYO YE-PTFE Ukongeza kwi-PTFE esulungekileyo, kukho iipolymer ezimbini ezisebenzisanayo eziluncedo ngokulinganayo njenge-PTFE, kodwa ezineempawu ezithile ezahlukeneyo.
I-PFA okanye i-Perfluoroalkoxy ineempawu ezifanayo kakhulu ne-PTFE kuba ayinyangeki ngamachiza, ibhetyebhetye kwaye izinzile ngokwe-thermal (ngokusetyenziswa rhoqo ukuya kuthi ga kwi-260 degrees C), kodwa ngelixa i-PTFE inotyekelo lokuchwechwela, i-PFA ayinyangeki kwaye ilunge kakhulu. ukunyibilika-ukulungiswa, ukubumba inaliti, i-extrusion, ukubunjwa koxinzelelo, ukubumba ukuvuthela, kunye nokudlulisa ukubumba.
I-TFM, eyaziwa ngokuba yi-PTFE-TFM, yi-polytetrafluoroethylene ene-perfluoropropylvinylether njengesilungisi esongezelelweyo, inika imathiriyeli eshinyeneyo eqinile, ekwanokurhubuluza okuxhathisayo njenge-PFA, kwaye inokuweldable.I-PTFE EGCWALIWEYO okanye i-PTFE enyulu inokukhubaza kakubi phantsi komthwalo, kodwa ukusetyenziswa kweefayili kunokunceda ngale nto, nangona kufuneka kuqatshelwe ukuba ayizizo zonke i-PTFE ezizaliswe ngokufanelekileyo ngokutya.
Ukongeza i-filler kwi-PTFE kunokunyusa amandla ayo, ukuphucula ukuchasana nokuxhatshazwa, ukongeza umbane kunye nokunye;nangona kunjalo, ukongeza izihluzi kunokunciphisa ezinye zeepropathi eziluncedo ze-PTFE, ezifana nokumelana neekhemikhali eziya kuthintelwa yileyo yokugcwalisa.
Izizalisi ezisetyenzisiweyo zinokuvela kwiglasi kwiipesenti ezahlukeneyo, insimbi engenasici, i-molybdenum disulphide, ikhabhoni okanye igraphite, kuxhomekeke kwiipropati eziza kuphuculwa.
I-ADWENTLE KUNYE NEZINZUZO ZOKUSEBENZISA i-PTFEEyona inzuzo enkulu ye-PTFE kukuguquguquka kwayo, kunye noluhlu lwezicelo kwiimveliso ezininzi kunye namashishini ahlukeneyo ale mathiriyeli ayamangalisa.
Ukusetyenziswa kwe-PTFE kunokuba neenzuzo ezinkulu kwimveliso kunye nobunjineli, kungekhona nje ekwenzeni iityhubhu okanye iilayini zokuphatha okanye ukugcina imichiza eyonakalisayo, kodwa ngokugquma iindawo ezinjengeebheringi okanye izikrufu ukunyusa ubomi bawo omabini la malungu kunye noomatshini abakhoyo. inxalenye ye.
I-PTFE-coated screw iya kuxhathisa ekudlekeni, ngenxa yesakhono se-PTFE sokugxotha amanzi kunye ne-oyile, kwaye sithanjiswe ngesixhobo sokuqhuba ngokutyibilikayo kuyo nayiphi na indawo obambelela kuyo, kunye nokukhuhlana okuncitshisiweyo, okukhokelela ekugugeni okuncinci kuzo zombini izikrufu kunye umphezulu, kunye nesiphelo esihlala ixesha elide, esikhuseleke ngakumbi.
I-Friction kunye nokunxiba kunokuba yimiba eneebheringi, kwaye idyasi ye-PTFE inokunika izibonelelo ezifanayo kunye nezikrufu zokugquma, kunye nenzuzo eyongezelelweyo yokuba i-coating nayo iya kukwazi ukumelana nobushushu.
Kucacile ukuba iindawo ezihlala ixesha elide, ezisebenza kakhulu zinokongeza kwimpumelelo yawo nawuphi na umatshini, zinciphise imfuneko yokusoloko zifumana iinxalenye zokutshintsha, kokubini ukonga imali kunye nexesha elifunekayo ukuze ulungelelanise izinto ezitshintshwayo, kunye nokunciphisa inkunkuma.Oku kuya kunciphisa iimfuno zolondolozo njengoko kunqabile ukuba kubekho iimpazamo kwisixhobo, kwaye kwakhona kunciphise kakhulu, okanye kude kuphelise, naliphi na ixesha lokwenziwa kwexabiso elibiza imali eninzi ngenxa yeempazamo okanye ukulungiswa.
Ukucocwa kwezixhobo kunokuncitshiswa kwezinye iimeko njengoko idyasi ye-PTFE ingenamanzi, iququzelela ukucocwa kwamalungu.
Kwaye i-polymer textile finishes inokunceda nokusingqongileyo, kuba, xa isetyenziswe kwilaphu, ukugqitywa kuya kugxotha amanzi kunye neoli ye-oyile, ukunciphisa isidingo sokusebenzisa ukucoca okomileyo, kunye namalaphu nawo aya koma ngokukhawuleza, esebenzisa amandla amancinci ngokumisa i-tumble, kwaye ihlala ixesha elide ngenxa yokuncipha kokunxiba.
Ngeenzuzo ezongezelelweyo ukuba PTFE non-ityhefu, kuphela contraindication encinane abantu ukusuka polymer fume fever (kuphela ukuba ubushushu naziphi na iipani polymer-coated ukufikelela 260 degrees C) kwaye FDA evunyiweyo kwaye ukutya-ekhuselekileyo, le mathiriyeli ngokwenene. luluncedo olukhulu kwiindawo ezininzi ezahlukeneyo.UKUSETYENZISWA UMDLALI KWE-PTFEAs kunye nokugquma yonke into ukusuka kwiipani ukuya kwiibheringi, i-PTFE ikwasetyenziselwa ukumisa iindonga zokukhwela izinambuzane njengoko izinto zingekho 'zikhuni' kangangokuba izinambuzane (kunye negeckos) azikwazi ukubamba.Ipolymer isetyenziswa rhoqo njengoko i-coating kwi-catheters ukunqanda ibhaktheriya kunye nosulelo kwaye ikwasetyenziswa njenge-graft material kutyando.
Uya kuba uvile nge-Gore-Tex, kwaye yi-PTFE kwakhona, ngeli xesha njenge-membrane ebhityileyo, ene-porous yokwenza imvula ephefumulayo inxibe, okanye ukufakelwa kwezonyango, ukugquma iingcingo kunye nezitywini.
Ukhumbula ukuba i-PTFE yafunyanwa ngengozi eyonwabileyo ngo-1938, kunzima ukucinga ngehlabathi lethu namhlanje ngaphandle kwayo.
Ukuba unomdla ekusebenziseni i-PTFE kuyo nayiphi na iprojekthi zakho, okanye ukuba ungathanda ukufumana ulwazi oluthe kratya malunga neempawu ze-PTFE, nceda uqhagamshelane kwaye singakuvuyela ukuthetha nawe ngeenketho zakho.
Ixesha lokuposa: May-30-2020