Polytetrafluoroethylene(I-Teflon okanye i-PTFE), eyaziwa ngokuba "yinkosi yeplastiki", i-polymer compound eyenziwe nge-tetrafluoroethylene nge-polymerization, enozinzo olubalaseleyo lweekhemikhali, ukuxhathisa ukubola, ukutywinwa, ukuthambisa okuphezulu okungeyona i-viscosity, ukugquma kombane kunye nokunyamezela okulungileyo kokuguga.

I-PTFE ilula ukubanda kwaye ihambe phantsi koxinzelelo kunye nobushushu obuphezulu, ngoko ke isetyenziselwa uxinzelelo oluphantsi, ubushushu obuphakathi, ukubola okunamandla kwaye ungavumeli ungcoliseko lwe-medium, njenge-asidi eqinile, i-alkali, i-halogen, amayeza kunye nokunye. . Ubushushu bokusebenza obukhuselekileyo yi-150℃ kwaye uxinzelelo lungaphantsi kwe-1MPa. Amandla e-PTFE agcwalisiweyo aya kunyuka, kodwa ubushushu bokusetyenziswa abunakugqithisa i-200 ℃, ngaphandle koko ukuxhathisa kwe-corrosion kuya kuncipha. Uxinzelelo losetyenziso oluphezulu lokupakishwa kwe-PTFE alukho ngaphezu kwe-2MPa.

Ngenxa yokunyuka kweqondo lokushisa, izinto eziphathekayo ziya kukhwela, okukhokelela ekunciphiseni okukhulu koxinzelelo lwetywina. Nangona iqondo lokushisa lifanelekile, kunye nokwandiswa kwexesha, ukunyanzeliswa kokunyanzeliswa kwendawo yokutywinwa kuya kuncipha, okukhokelela "kwimeko yokuphumla koxinzelelo". Le nto iya kwenzeka kuzo zonke iintlobo zeegaskets, kodwa ukuphumla koxinzelelo lwe-PTFE pad kubaluleke kakhulu, kwaye kufuneka kuphapheme.

I-coefficient ye-friction ye-PTFE incinci (uxinzelelo loxinzelelo lukhulu kune-4MPa, i-coefficient ye-friction yi-0.035 ~ 0.04), kwaye i-gasket ilula ukuyikhupha ngaphandle xa iqinisa ngaphambili, ngoko ke kungcono ukusebenzisa i-concave kunye ne-convex ye-flange surface. Ukuba i-flange flat isetyenzisiwe, i-diameter yangaphandle ye-gasket inokudibaniswa nebholithi ukukhusela i-gasket ukuba ikhuphe ngaphandle.

Ngenxa yokuba izixhobo zeglasi zitshizwa emva kokutshiza umaleko we-enamel kumphezulu wesinyithi, umaleko weglaze uyaqhawuka kakhulu, udityaniswa nokutshiza okungalinganiyo kunye nokuhamba komgangatho we-glaze, umphezulu weflange umbi. I-metal composite gasket kulula ukuyonakalisa umaleko we-glaze, ngoko kuyacetyiswa ukuba usebenzise izinto ezingundoqo ezenziwe ngebhodi ye-asbestos kunye ne-rubber PTFE yokupakisha. Ukupakisha kulula ukudibanisa kunye nomphezulu we-flange kunye nokumelana nokubola, kwaye umphumo wokusetyenziswa ulungile.

Zininzi iifektri kwiqondo lobushushu, uxinzelelo aluphezulu kwindawo eyomeleleyo enomhlwa, ukusetyenziswa kwepleyiti ye-asbestos yerabha esongelwe ibhanti lemathiriyeli ekrwada ye-PTFE, imibhobho edla ngokuchithwa, imibhobho. Ngenxa yokuba imveliso kunye nokusetyenziswa kulula kakhulu, kuyathandwa kakhulu.