PTFE chinhu chinobatsira zvakanyanya nekuti ine yakasarudzika musanganiswa wezvivakwa.PTFE ikemikari inert, mamiriro ekunze, yakanakisa magetsi ekudzivirira, yakakwirira tembiricha kuramba, yakaderera coefficient of friction uye isina-adhesive properties.Shrinkable tubing inoshandiswawo sevhavha yemapumburu uye kuchengetedza zvikamu zvemagetsi kana zvikamu.PTFE inogona zvakare skived kana extruded mumatepi uye mafirimu anogona kushandiswa zvisimbiso uye gasket zvinhu.polymer izita rinozivikanwa rekutengesa re polytetrafluoroethylene (PTFE) rakagadzirwa.
Magiredhi ese ePolymer PTFE (polytetrafluoroethylene) hupfu hwakatsetseka, hunogona kuzorwa uye kubudiswa nemaitiro akajairwa paste extrusion.Kuenzaniswa nemamwe magiredhi ePTFE poda yakatsetseka,polymer PTFE iresin yakawedzera kunyunguduka uye kuderera kuderera.Ndiyo imwe yeanonyanya kuenderana uye ari nyore-kugadzirisa resins.Iyo inonyanya kukodzera kune zvigadzirwa nepakati-kusvika-yakakwirira reductionratio extrusions.
Zvigadzirwa zvakanyatsogadzirwa zvakagadzirwa kubva kutsvina yepolymer PTFE zvinopa zvemhando yepamusoro zvimiro zvefluoropolymer resin: kuchengetedza zvivakwa mushure mesevhisi pa260 ° C (500 ° F), zvinobatsira zvivakwa pa -240 ° C (-400 ° F), makemikari inertness kusvika angangoita ese makemikari emuindasitiri uye zvinonyungudutsa, uye kukweshana kwakaderera uye antistick nzvimbo.Dielectric zvivakwa zvakatanhamara uye zvakagadzikana ne frequency uye tembiricha.Zvigadzirwa zvine kuoma kuri pakati nepakati uye kukwirisa kwekupedzisira. Mumamiriro emurazvo, zvigadzirwa zvepolymer PTFE zvinoramba kubatika uye hazvikurudzire kupararira kwemoto.Pazvinobatidzwa nemurazvo kubva kune mamwe manyuko, mupiro wavo wekupisa mudiki uye nehutsi hushoma.
polymer PTFE yakagadzirirwa extrusion nekusanganisa neyemvura extrusion rubatsiro.Iyo hupfu yakanyoroveswa inomanikidzwa kuita cylindrical preform slug uye inoiswa muhumburumbira yerudzi rwegondohwe extruder.Pasi pekudzvinyirirwa kwakanyanya, kuumbwa kunomanikidzwa kuburikidza nekufa kwekupedzisa kugadzira beading, tubing, kana machira.Zvinhu zvakasiyana-siyana, zvakadai sesimbi yesimbi kana yakakwirira-tembiricha fiber, inogona kuputirwa nekuvadyisa kuburikidza neaxis ye extruder barrel.Mushure me extrusion, chigadzirwa chacho chakaderera-density, asi chakabatana, fibrous structure.polymer PTFE 640 inowanzogadziriswa mberi, nekupisa, kuita yakasimba resin chigadzirwa, senge tubing.Heat inoshandiswa mumatanho maviri, anogona kuitwa mu-line ne extrusion kana zvakasiyana.Mafuta anofanira kutanga abviswa, kazhinji nekudziya mukati mechikamu che100–300°C (212–572°F).Danho rekunyungudutsa rinotevera kunyungudutsa virgin resin pamusoro peinonyungudika yecrystalline inosvika 342°C (648°F) uye kuburitsa isina chinhu, isina kushushikana, uye yakasimba chigadzirwa chePTFE resin.Kana ikaitwa mumutsara, matanho ekupisa anotarisa kukurumidza mutsara wekukurumidza.Reduction ratio (RR) ndiyo chiyero chemuchinjikwa we preform kune iyo extrudate;iri extrusion parameter inokanganisa kusarudzwa kwegiredhi resin.
Nguva yekutumira: May-04-2018