Lub hnab yas yam ntxwv
Dec 16, 2024| Cov hnab ntim khoom noj uas nquag siv feem ntau yog ua los ntawm polyethylene zaj duab xis, uas tsis muaj tshuaj lom thiab tuaj yeem siv rau zaub mov. Kuj tseem muaj cov yeeb yaj kiab ua los ntawm polyvinyl chloride, uas kuj tsis muaj tshuaj lom, tab sis cov tshuaj ntxiv ntxiv raws li kev siv cov yeeb yaj kiab feem ntau muaj kev phom sij rau tib neeg lub cev thiab muaj qee yam toxicity. Yog li ntawd, xws li cov yeeb yaj kiab thiab cov hnab yas ua los ntawm cov yeeb yaj kiab tsis haum rau tuav cov khoom noj. Txhawm rau txheeb xyuas cov hnab yas PVC thiab cov hnab yas polyethylene, cov txheej txheem yooj yim hauv qab no tuaj yeem siv los txheeb xyuas.
Polyethylene zaj duab xis (tsis muaj tshuaj lom)
Cov zaj duab xis yog mis nyuj dawb, translucent (tshwj xeeb tshaj yog pom tseeb thaum ob peb txheej yog stacked), nws yog lubricated ntau rau qhov kov, zoo li yog cov nto yog coated nrog ib tug ciab txheej, nws yog ib qho nyuaj rau co, lub suab yog nkig, nws yog flammable. Nyob rau hauv cov nplaim taws, cov nplaim yog daj, thiab muaj cov nplaum nplaum thaum hlawv. Thiab muaj qhov tsw ntawm tswm ciab hlawv.
Polyvinyl chloride zaj duab xis (feem ntau tshuaj lom)
Yog tias tsis muaj xim ntxiv, nws yog pob tshab. Nws hnov ntxhiab ntawm qhov chaw, nws nyuaj rau co, lub suab qis, nws tsis yooj yim rau hlawv thaum hluav taws, nws raug tua los ntawm cov nplaim taws, thiab cov nplaim taws yog ntsuab.