Tau ntau tshaj li rau caum xyoo Polytetrafluoroethylene (PTFE, hom npe: Tarflen, polymer, Fluon) tau paub thiab lees paub rau nws cov khoom tshwj xeeb.Nws yog dav siv nyob rau hauv tag nrho cov ceg ntawm kev lag luam, nrog rau zus tau tej cov saj zawg zogcov kav dejntawm ntau yam kev tsim kho thiab kev siv.
PTFE cov khoom tshwj xeeb:
- Cov tshuaj tiv thaiv zoo heev.Nws tsis yaj los yog o nyob rau hauv ib yam ntawm cov kuab tshuaj paub.Nws yog resistant mus rau heev txhoj puab heev acids thiab bases.Tsuas yog tsawg heev, tsis tshua muaj tshuaj (fluorine, boiling alkali hlau, oxygen bifluoride, chlorine trifluoride) tuaj yeem cuam tshuam rau PTFE.- Ntau yam ntawm thermal resistance.PTFE tseem hloov tau txawm tias nyob rau ntawm qhov kub ntawm cov kua helium (-269 ° C).Crystalline melting point ntawm PTFE yog +327 ° C, thiab ntawm +415 ° C decomposition ntawm PTFE yuav siv qhov chaw.Ua hauj lwm kub rau hoses ua los ntawm PTFE feem ntau yog nyob ntawm -70 ° C mus txog +260 ° C nyob ntawm seb lub hose tsim (siab thiab mechanical parameters ntawm PTFE pib txo thaum kub nce siab tshaj +130 ° C).- Resistance rau aging. thiab huab cua tej yam kev mob.PTFE yog hydrophobic, nkaus resistant rau ozone, oxygen, lub teeb thiab UV hluav taws xob.Cov qauv nthuav tawm rau ntau lub kaum xyoo rau ntau yam kev nyab xeeb tsis tau pom muaj kev hloov pauv rau PTFE cov khoom.- PTFE muaj qhov coefficient qis heev ntawm kev sib txhuam (los ntawm 0.02 txog 0.2) thiab tus nqi qis ntawm lub zog saum npoo.Yog li cov hoses ua los ntawm PTFE muaj cov khoom siv tu tus kheej (cov khoom tsis lo rau cov phab ntsa hose) yog li kev hloov mus rau kev tu cev zoo heev.- Cov khoom siv hluav taws xob zoo, muaj zog tiv taus.- Nws tus kheej-extinguishing zog.- Muaj kev tiv thaiv rau kev puas tsuaj.
Lwm cov ntaub ntawv zoo ib yam li PTFE
Hoses tuaj yeem tsim tsis tau tsuas yog los ntawm PTFE tab sis kuj los ntawm PTFE copolymers.Lawv feem ntau muaj cov tshuaj lom neeg thiab thermal tsis kam, tab sis lwm yam khoom muaj qhov sib txawv me ntsis hauv kev sib piv rau PTFE (zoo dua mechanical resistance, zoo ua hauj lwm zoo):
- FEP (polymer FEP, DuPont), - PFA, MFA (polymer PFA, DuPont), - ETFE (Tefzel, DuPont), - ECTFE (Halar).
Kev tsim thiab kev tsim kho ntawm PTFE hoses
Vim tias muaj viscosity siab txawm tias qhov kub thiab txias ze rau thermal decomposition (+ 415 ° C),PTFE hosesyog tsim los ntawm extruding lub compound ntawm lubricant (paraffin roj) thiab PTFE hmoov.
Hom PTFE hose siv:
- Smooth thiab corrugated hoses tsis muaj braid.Siv rau kev siv tsis tshua muaj siab.Translucent, PTFE phab ntsa tso cai rau qhov pom kev tswj ntawm qhov ntws.- Cov hoses du nrog ib qho los yog ob chav sab nraud braid ua los ntawm stainless hlau.Dav dav siv rau yuav luag txhua qhov kev tshaj tawm: tshuaj lom neeg, gases, chav, roj, lubricants, roj, xim, adhesives, khoom noj khoom haus hauv txhua ceg ntawm kev lag luam.Kev sib xyaw ua ke ntawm kev ua haujlwm siab ntawm cov hoses (txog li ntawm 400 bar) thiab PTFE cov khoom tshwj xeeb ua rau muaj kev daws teeb meem thoob ntiaj teb thiab hloov tsis tau rau kev siv tshuab tsis ntev los no.- Corrugated hoses nrog sab nraud braids ua los ntawm stainless hlau los yog cov khoom sib txawv.Qee zaum ntxiv dag zog nrog cov hlau hlau helix ntawm PTFE thiab cov hlua sab nraud.Tsim nyob rau hauv ntau yam kev xaiv siv nrog qis ua hauj lwm siab tab sis siab dua rhiab dua li du bore hoses.- Smooth bore hoses nrog ib tug extruded PTFE liner nrog ib tug textile braid, steel hlau helix reinforcement thiab ib tug sab nrauv txheej ua los ntawm roj hmab.Tag nrho cov khaubncaws sab nraud povtseg yog vulcanized thiab mus tas li kev koom ua ke nrog PTFE sab hauv txheej - raws li nyob rau hauv tus qauv roj hmab hose.Siv feem ntau hauv kev lag luam chemical.
Post lub sij hawm: Jun-02-2018