Vent yog ib daim ntawv thov nyob rau hauv daim nyias nyias nyias, ib txoj kev sib cais tshiab los cais thiab lim cov sib tov nyob rau hauv qhov kev txiav txim ntawm sab nraud tsav tsheb los ntawm kev siv ib tug tshwj xeeb tsim daim nyias nyias nrog xaiv permeability. Cov membrane no muaj cov cuab yeej tso cai rau qee yam khoom hla dhau thiab qee yam khoom tsis dhau. Txij li thaum xyoo 1960, cov tshuab sib cais membrane tau nce sai heev. Tam sim no, feem ntau yog PTFE, Nylon, PES, PVDF, PP, NC, MCE, PETE thiab lwm yam filtration membranes. Ntawm lawv, PTFE yog siv rau nws superior tshuaj stability thiab ntuj hydrophobicity. nyob rau hauv qhov cua.
Waterproof vent yog tsuas yog embodied nyob rau hauv waterproof ventilation, dustproof qhov cua thiab cov kab mob ventilation tiv thaiv, thiab yog dav siv nyob rau hauv tsheb, kho mob, ib puag ncig xyuas, ntim, hluav taws xob sensor tiv thaiv thiab lwm yam teb. Waterproof vent yog tsuas yog siv rau waterproof thiab breathable khaub ncaws. Nws yog hu ua "cov ntaub ntawv breathable" nyob rau txawv teb chaws.
Qhov cua feem ntau yog siv cov microfiltration membranes nrog qhov pore loj ntawm 0.1-10μm. Rau qhov cua, muaj ob qhov tseem ceeb heev ntawm cov dej nkag siab thiab huab cua permeability. Raws li qhov xwm txheej ib txwm muaj, ob qho tib si nyob rau hauv kev sib tw, thiab huab cua permeability siab txhais tau hais tias tsis tshua muaj dej inlet siab. Qhov cua feem ntau yog siv hydrophobic thiab oleophobic daim nyias nyias, thiab feem ntau, oleophobic daim nyias nyias yog siv. Txawm hais tias ePTFE muaj ntuj hydrophobic thiab oleophobic zog, nws yuav ntub thiab nkag mus thaum ntsib qee cov kua dej xws li cawv, tshuaj ntxuav, thiab cov roj nplua nyeem uas muaj lub zog qis. Cov yeeb yaj kiab oleophobic muaj lub zog qis dua thiab tuaj yeem tiv thaiv qhov nkag ntawm cov kua dej no.
Txij li ntau cov khoom siv thiab cov ntawv thov xav tau ib puag ncig kaw, lawv tsis tuaj yeem cuam tshuam los ntawm cov plua plav sab nraud, dej, thiab kab mob. Yog tias nws tau tsim los kaw tshwj xeeb, nyob rau hauv lub hom phiaj ntawm qhov kub thiab txias hloov pauv, nws yuav ua rau muaj kev hloov pauv siab. Feem ntau, xws li kev hloov siab yuav muaj cov nyhuv agglomeration, uas yuav ua rau kev puas tsuaj rau lub plhaub thiab qhov chaw rhiab hauv. Kev siv ePTFE qhov cua tuaj yeem sib npaug qhov sib txawv ntawm qhov sib txawv, txo tus nqi ntawm cov khoom tsim, thiab xyuas kom muaj kev ntseeg siab thiab kev ntseeg siab ntawm cov khoom.
Tam sim no, ePTFE qhov cua feem ntau yog siv rau hauv: tsheb qhov cua, cua tshuab kho mob, hluav taws xob sensor qhov cua, ntim qhov cua, thiab ntim qhov cua muaj xws li tsev neeg ntim khoom, ntim khoom ua liaj ua teb thiab ntim khoom lag luam thiab lwm yam.