Dab tsi yog qhov tseem ceeb ntawm kev siv cov khob ntawv pov tseg
Tso lus
Cov khob ntawv pov tseg tau yooj yim nqa thiab siv, pheej yig cov khob khob, thiab yog cov cuab yeej haus dej haus hauv ntau tsev neeg thiab cov chaw pej xeem. Nws siv cov polyethylene rov ua dua tshiab, uas ua rau muaj kev hloov pauv thaum lub sijhawm rov ua dua tshiab, ua rau muaj ntau yam teeb meem uas muaj feem cuam tshuam rau hauv dej thaum siv.
Lub luag haujlwm loj tshaj plaws ntawm cov khob ntawv yog tuav cov dej haus xws li cov dej qab zib carbonated, kas fes, mis nyuj, dej qab zib, thiab lwm yam. Qhov no yog nws qhov ntxov tshaj plaws thiab feem ntau siv.
Lub khob haus dej tuaj yeem muab faib ua ob hom: khob txias thiab khob kub. Cov khob txias yog siv los tuav cov dej txias, xws li dej qab zib, kas fes iced, thiab lwm yam; Cov khob kub yog siv los tuav cov dej kub xws li kas fes, tshuaj yej dub, thiab lwm yam.
Qhov sib txawv ntawm cov khob haus dej txias thiab cov khob haus dej kub, lawv txhua tus muaj lawv tus kheej ua haujlwm, thiab thaum lawv ua tsis zoo, lawv tuaj yeem ua rau cov neeg siv khoom noj qab haus huv. Qhov saum npoo ntawm lub khob haus dej txias yuav tsum tau kho nrog siv quav ciab los yog immersion. Vim tias cov dej haus txias tuaj yeem ua rau cov dej ntim rau ntawm lub khob ntawv, ua rau lawv muag muag, siv cov quav ciab tuaj yeem ua rau lawv tsis muaj dej. Cov wax no ruaj khov thiab nyab xeeb ntawm 0-5 degree .
Tab sis yog tias siv los tuav cov dej qab zib kub, tsuav yog qhov kub ntawm cov dej haus tshaj 62 degree, cov wax yuav yaj thiab lub khob ntawv yuav nqus dej thiab deform. Lub melted paraffin muaj impurities siab, tshwj xeeb tshaj yog polycyclic aromatic hydrocarbons, uas yog carcinogenic tshuaj uas yuav ua rau tib neeg noj qab haus huv thaum nkag mus rau hauv lub cev nrog dej haus. Qhov saum npoo ntawm lub khob haus dej kub yuav tsum tau them nrog ib qho tshwj xeeb polyethylene zaj duab xis lees paub los ntawm lub teb chaws, uas tsis yog tsuas yog muaj cua sov zoo tab sis kuj tsis muaj tshuaj lom thaum soaked hauv cov dej kub kub. Cov khob ntawv yuav tsum muab khaws cia rau hauv qhov cua, txias, qhuav, thiab tsis muaj kuab lom, thiab lub sijhawm cia yuav tsum tsis pub tshaj ob xyoos txij li hnub tsim khoom.
