Zambiri za PTFE hoses

Kwa zaka zopitilira makumi asanu ndi limodzi Polytetrafluoroethylene (PTFE, mayina amtundu: Tarflen, polima, Fluon) yadziwika ndikuzindikiridwa chifukwa cha mawonekedwe ake apadera.Amagwiritsidwa ntchito mu nthambi zonse zamakampani, kuphatikiza kupanga zosinthikahosesza zomangamanga ndi ntchito zosiyanasiyana.

Makhalidwe apadera a PTFE:

- Wabwino kukana mankhwala.Simasungunula kapena kutupa mu zosungunulira zodziwika.Imalimbana ndi zidulo zaukali komanso maziko.Ndi zinthu zochepa chabe, zosowa kwambiri (fluorine, zitsulo zotentha za alkali, oxygen bifluoride, chlorine trifluoride) zomwe zingakhudze PTFE.- Zosiyanasiyana za kukana kutentha.PTFE imakhalabe yosinthika ngakhale kutentha kwa helium yamadzimadzi (-269 ° C)) .Kutentha kogwira ntchito kwa mapaipi opangidwa ndi PTFE nthawi zambiri kumakhala kuyambira -70 ° C mpaka +260 ° C kutengera kapangidwe ka payipi (kupanikizika ndi makina a PTFE kumayamba kuchepa kutentha kumakwera kuposa +130 ° C) - Kukana kukalamba ndi nyengo.PTFE ndi hydrophobic, kugonjetsedwa kwathunthu ndi ozoni, mpweya, kuwala ndi UV kuwala.Zitsanzo zowululidwa kwa zaka khumi ndi ziwiri kuzinthu zosiyanasiyana za nyengo sizinasonyeze kusintha kulikonse kwa katundu wa PTFE.- PTFE ili ndi coefficient yotsika kwambiri ya kukangana (kuchokera ku 0.02 mpaka 0.2) ndi mtengo wotsika wa mphamvu pamwamba.Choncho ma hoses opangidwa ndi PTFE ali ndi katundu wodziyeretsa (zinthu sizimamatira ku makoma a payipi) kotero kuti kusamutsidwa kumakhala kwaukhondo kwambiri.

Zida zina zofanana ndi PTFE

Ma hoses amatha kupangidwa osati kuchokera ku PTFE komanso kuchokera ku PTFE copolymers.Nthawi zambiri amakhala ndi mankhwala komanso kukana kwamafuta koma zinthu zina ndizosiyana pang'ono poyerekeza ndi PTFE (kukana bwino kwamakina, kuwongolera bwino):

- FEP (polymer FEP, DuPont),- PFA, MFA (polymer PFA, DuPont),- ETFE (Tefzel, DuPont),- ECTFE (Halar).

Kupanga ndi kupanga mapaipi a PTFE

Chifukwa cha kukhuthala kwakukulu ngakhale pa kutentha pafupi ndi kuwonongeka kwa kutentha (+415 ° C),Zithunzi za PTFEamapangidwa ndi extruding pawiri wa lubricant (parafini mafuta) ndi PTFE ufa.

Mitundu ya kamangidwe ka payipi ya PTFE:

- Mapaipi osalala komanso malata opanda zoluka.Amagwiritsidwa ntchito pochepetsa kuthamanga kwa magazi.Translucent, khoma la PTFE limalola kuwongolera koyenda.- Ma hoses osalala okhala ndi chingwe chimodzi kapena ziwiri zakunja zopangidwa ndi chitsulo chosapanga dzimbiri.Amagwiritsidwa ntchito kwambiri pafupifupi ma TV onse: mankhwala, mpweya, nthunzi, mafuta, mafuta, mafuta, utoto, zomatira, zakudya m'mafakitale onse.Kuphatikizika kwa mphamvu yogwira ntchito kwambiri ya ma hoses (mpaka kuzungulira 400 bar) ndi PTFE yapadera katundu kumabweretsa yankho lachilengedwe chonse komanso losasinthika laukadaulo waposachedwa wamakampani.- Mapaipi opangidwa ndi malata akunja opangidwa ndi chitsulo chosapanga dzimbiri kapena zida zosiyanasiyana.Nthawi zina amalimbikitsidwa ndi waya wachitsulo helix pakati pa PTFE ndi kuluka kwakunja.Amapangidwa muzosankha zosiyanasiyana zomanga ndi kupanikizika kochepa kogwirira ntchito koma kusinthasintha kwakukulu kuposa ma hoses osalala.Zigawo zonse zimatenthedwa ndikuphatikizidwa kosatha ndi PTFE mkati wosanjikiza - monga muyeso wa rabara.Amagwiritsidwa ntchito makamaka m'makampani opanga mankhwala.