PTFE medianthawi zambiri amatanthauza cholumikizira chopangidwa ndi polytetrafluoroethylene (PTFE mwachidule). Izi ndi chiyambi chatsatanetsatane cha cholumikizira cha PTFE:

Ⅰ. Katundu wa zinthu

1. Kukhazikika kwa mankhwala

PTFE ndi chinthu chokhazikika kwambiri. Chimalimbana ndi mankhwala ndipo sichimalimbana ndi mankhwala onse. Mwachitsanzo, m'malo okhala ndi ma asidi amphamvu (monga sulfuric acid, nitric acid, ndi zina zotero), maziko olimba (monga sodium hydroxide, ndi zina zotero) ndi zinthu zambiri zosungunulira zachilengedwe (monga benzene, toluene, ndi zina zotero), zinthu za PTFE sizingagwirizane ndi mankhwala. Izi zimapangitsa kuti ikhale yotchuka kwambiri m'magwiritsidwe ntchito monga zomangira ndi mapaipi m'mafakitale a mankhwala ndi mankhwala, chifukwa mafakitale awa nthawi zambiri amafunika kuthana ndi mankhwala osiyanasiyana ovuta.

2. Kukana kutentha

Cholumikizira cha PTFE chimatha kusunga magwiridwe ake pa kutentha kwakukulu. Chimatha kugwira ntchito bwino pa kutentha kwa -200℃ mpaka 260℃. Pa kutentha kochepa, sichidzasweka; pa kutentha kwakukulu, sichidzawola kapena kusokonekera mosavuta monga mapulasitiki wamba. Kukana kutentha kumeneku kumapangitsa kuti cholumikizira cha PTFE chigwiritsidwe ntchito kwambiri mumlengalenga, zamagetsi ndi zina. Mwachitsanzo, mu dongosolo la hydraulic la ndege, cholumikizira cha PTFE chimatha kupirira kutentha kwakukulu komwe kumachitika chifukwa cha kusintha kwa kutentha kwa mlengalenga ndi magwiridwe antchito a dongosolo paulendo.

3. Kuchepa kwa kukangana

PTFE ili ndi coefficient yotsika kwambiri ya friction, imodzi mwa zinthu zotsika kwambiri pakati pa zinthu zolimba zodziwika. Dynamic ndi static friction coefficients zake zonse ndi zazing'ono kwambiri, pafupifupi 0.04. Izi zimapangitsa PTFE dielectric kukhala yothandiza kwambiri ikagwiritsidwa ntchito ngati mafuta m'zigawo zamakina. Mwachitsanzo, mu zida zina zotumizira ma mechanical, ma bearing kapena bushings opangidwa ndi PTFE amatha kuchepetsa friction pakati pa zigawo zamakina, kuchepetsa kugwiritsa ntchito mphamvu, ndikuwonjezera moyo wa ntchito ya zida.

4. Kuteteza magetsi

PTFE ili ndi mphamvu zabwino zotetezera magetsi. Imasunga kukana kwakukulu kwa kutetezera magetsi pamlingo wosiyanasiyana. Mu zida zamagetsi, PTFE dielectric ingagwiritsidwe ntchito kupanga zinthu zotetezera magetsi, monga waya ndi zingwe zotetezera magetsi. Imatha kuletsa kutuluka kwa magetsi, kuonetsetsa kuti zida zamagetsi zikugwira ntchito bwino, komanso kupewa kusokonezedwa ndi maginito akunja.

Mwachitsanzo, mu zingwe zolumikizirana zothamanga kwambiri, gawo loteteza la PTFE lingathe kutsimikizira kukhazikika ndi kulondola kwa kutumiza kwa chizindikiro.

5. Kusamamatira

Pamwamba pa PTFE dielectric pali kusamata kwambiri. Izi zili choncho chifukwa mphamvu ya maatomu a fluorine mu kapangidwe ka molekyulu ya PTFE ndi yayikulu kwambiri, zomwe zimapangitsa kuti pamwamba pa PTFE pakhale zovuta kuti pakhale kulumikizana ndi zinthu zina. Kusamata kumeneku kumapangitsa kuti PTFE igwiritsidwe ntchito kwambiri mu zophimba za ziwiya zophikira (monga mapani osamata). Chakudya chikaphikidwa mu poto yosamata, sichimamatira mosavuta pakhoma la poto, zomwe zimapangitsa kuti kuyeretsa kukhale kosavuta komanso kuchepetsa mafuta omwe amagwiritsidwa ntchito pophika.