1. Qhov nruj thiab dej vapor permeability ntawm lub raj mis lub cev thiab lub hau. Airtightness thiab dej vapor permeability yog ob qho kev qhia tseem ceeb ntawm cov hwj yas, thiab lawv ua lub luag haujlwm tseem ceeb hauv kev ruaj ntseg ntawm cov khoom ntim.
2. Tsis muaj teeb meem dab tsi raw khoom raug xaiv rau lub raj mis yas, nws yuav tsum xub ua kom tau raws li qhov yuav tsum tau muaj ntawm tsis muaj tshuaj lom thiab tsis muaj ntxhiab tsw. Vim muaj ntau yam ntawm cov khoom tseem ceeb muaj, nws yog ib qho tsim nyog los xaiv cov khoom zoo ntawm cov khoom siv raw. Feem ntau, high-density poly Ethylene, polypropylene, polyester fwj (PET fwj) tuaj yeem siv tau yog tias xav tau pob tshab, lub raj mis PET xim av tuaj yeem siv yog tias yuav tsum muaj cov khoom thaiv ntau dua, thiab yuav tsum muaj lub teeb thaiv thiab opaqueness. Cov ntaub ntawv ua kua dej feem ntau siv cov fwj polypropylene lossis polyester fwj. cov khoom siv tseem ceeb. Tam sim no, cov khoom noj khoom haus kev noj qab haus huv hauv tsev thiab lub raj mis ntim khoom noj yog tsim los ntawm PET lossis HPDE, thiab lub kaus mom yog ua los ntawm PP.
3, lub raj mis yas khoom cov qauv zoo. Qhov zoo ntawm cov khoom tuaj yeem raug txiav txim los ntawm cov khoom zoo ntawm cov chaw tsim khoom.
4. Nws yog txwv tsis pub siv cov khoom siv rov ua dua tshiab rau kev ntim tshuaj, khoom noj khoom haus, khoom noj thiab dej haus. "Kev ntsuas kev nyab xeeb ntawm cov khoom noj khoom haus yas thiab cov khoom siv raw" tshaj tawm los ntawm Ministry of Health muaj cov kev cai meej ntawm qhov no: "Txhua yam kev ua cov tais diav yas, ntim khoom noj, cov khoom ntim khoom noj, tsis muaj cov yas rov ua dua."
5. Kev ruaj ntseg zoo. Kev soj ntsuam cov neeg muag khoom tau dhau los ua ib feem tseem ceeb ntawm kev yuav lub raj mis yas. Los ntawm kev txheeb xyuas, nws muaj peev xwm ua kom tiav thiab raug kev ntsuam xyuas ntawm cov khoom cog cov software thiab kho vajtse, cov cuab yeej siv, thiab cov qib zoo.
