Vents yog ib qho kev siv ntawm kev sib cais membrane. Nws yog ib txoj kev sib cais tshiab uas siv cov khoom tshwj xeeb uas tsim los ua kom cov pa ua pa kom sib cais thiab lim cov khoom sib xyaw raws li kev ua ntawm kev tsav tsheb sab nraud. Cov membrane no muaj cov cuab yeej uas qee yam khoom tuaj yeem dhau los ntawm nws thiab qee yam khoom tsis tuaj yeem dhau los ntawm nws. Txij thaum pib ntawm xyoo 1960, kev siv 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 lim membranes. Ntawm lawv, PTFE breathable teb txais kev ruaj ntseg tshuaj zoo tshaj thiab ntuj hydrophobicity. poj niam deev.
Vents yog siv nyob rau hauv tsheb, kev kho mob, ib puag ncig xyuas, ntim, hluav taws xob sensor tiv thaiv thiab lwm yam teb. Vents feem ntau yog siv rau cov khaub ncaws tsis muaj dej thiab ua pa. Nws yog hu ua "breathable material" txawv teb chaws.
Microfiltration membranes feem ntau yog siv rau gas-permeable membranes, nrog ib tug pore loj ntawm 0 1-10 μm. Rau breathable membranes, muaj ob qhov tseem ceeb heev: dej inlet siab thiab huab cua permeability. Feem ntau hais lus, muaj kev sib tw ntawm ob qho tib si. Cov huab cua permeability siab yog suav tias yog dej siab tsawg. Cov vents feem ntau yog siv hydrophobic membranes thiab hydrophobic membranes, thiab feem ntau lawv siv hydrophobic membranes. ePTFE yog ib txwm hydrophobic thiab oleophobic, tab sis thaum nws ntsib qee cov dej cawv tsawg, cov tshuaj detergents, lubricants, thiab lwm yam kua, nws yuav ntub. Qhov saum npoo ntawm oleophobic membrane tuaj yeem txo qis kom tiv thaiv kev nkag mus ntawm cov kua dej no.
Tam sim no, ePTFE venting membranes yog tsuas yog siv rau tsheb venting, kho mob venting, hluav taws xob sensor venting, thiab ntim venting, nrog rau lub tsev ntim, ua liaj ua teb ntim, thiab industrial ntim.