Kev Lag Luam Zaj Duab Xis Siab: EVOH Tswj Xyuas Kev Ntim Khoom Noj

Kev tshuaj xyuas kev lag luam tshiab tshaj plaws qhia tau tias EVOH (Ethylene Vinyl Cawv) cov yeeb yaj kiab tseem niaj hnub tswj hwm qhov kev ntim khoom noj khoom haus uas muaj kev thaiv siab, suav txog kwv yees li 50% ntawm kev ua lag luamntim[^1]. Qhov feem ntawm kev lag luam tseem ceeb no yog vim EVOH cov khoom tiv thaiv zoo tiv thaiv cov pa oxygen, dej noo, thiab lwm yam sab nraud uas yuav ua rau cov khoom noj khoom haus zoo thiab kev nyab xeeb. Daim ntawv tshaj tawm qhia tias cov yeeb yaj kiab tiv thaiv siab, tshwj xeeb tshaj yog cov uas muaj EVOH, ua tau zoo dua li cov ntaub ntawv ntim khoom ib txwm muaj hauv kev ncua sijhawm txee thiab kev tiv thaiv khoom.

Cov kws tshaj lij hauv kev lag luam sau tseg tias qhov kev thov kom muaj lub sijhawm ntev dua hauv cov khoom noj khoom haus, tshwj xeeb tshaj yog nyob rau hauv cov lag luam tshiab thiab cov nroog loj uas muaj cov saw hlau sib txuas, tau yog qhov tseem ceeb rau evoh barrier kev siv cov ntim khoom. Cov khoom siv no muaj cov yam ntxwv zoo heev uas tiv thaiv tau cov pa oxygen, ua ke nrog nws lub peev xwm los tswj cov khoom kom tshiab thiab zoo, ua rau nws muaj txiaj ntsig zoo rau cov khoom noj uas rhiab heev xws li nqaij, mis nyuj, thiab cov khoom noj uas npaj txhij noj.

Tsis tas li ntawd xwb, cov chaw tsim khoom lag luam tab tom tsom mus rau kev tsim cov yeeb yaj kiab EVOH nyias dua yam tsis muaj kev cuam tshuam rau cov khoom thaiv, teb rau ob qho tib si kev nyuaj siab ntawm tus nqi thiab kev txhawj xeeb txog kev ruaj khov. Qhov sib txawv no sib haum nrog kev lag luam txoj kev txav mus rau kev txo cov khoom siv thaum tswj hwm lossis txhim kho cov yam ntxwv kev ua tau zoo. Daim ntawv tshaj tawm kuj qhia tau tias tus kab mob COVID-19 tau ua kom muaj kev siv cov kev daws teeb meem ntim khoom thaiv siab, vim tias cov neeg siv khoom thiab cov khw muag khoom nrhiav cov ntim khoom uas muaj kev tiv thaiv zoo dua thiab lub sijhawm khaws cia ntev dua.