1. Kev luam ntawv zoo heev: Nws siv cov txheej txheem ua phaj siab heev, uas ua kom cov ntawv luam tawm meej, ntse, thiab ci ntsa iab. Qhov no ua rau nws yog lub cuab yeej luam ntawv zoo tshaj plaws rau cov lag luam uas xav tau cov ntawv luam tawm zoo.
2. Kev luam ntawv ceev ceev: Lub tshuab luam ntawv stack flexo yog tsim los luam ntawv ceev ceev. Qhov no txhais tau tias cov lag luam tuaj yeem tsim cov ntawv luam tawm ntau hauv lub sijhawm luv luv.
3. Luam tawm dav dav: Nws siv tau rau kev luam tawm ntawm ntau hom yas zaj duab xis, suav nrog polyethylene (PE), polyvinyl chloride (PVC), thiab polypropylene (PP). Qhov no txhais tau tias cov lag luam tuaj yeem siv lub tshuab los luam tawm ntau yam khoom, los ntawm cov ntaub ntawv ntim khoom mus rau cov ntawv lo thiab txawm tias cov chij.
4. Cov kev xaiv luam ntawv yooj ywm: Lub tshuab luam ntawv flexo sib tshooj tso cai rau cov lag luam xaiv los ntawm ntau yam kua mem thiab phaj kom haum rau lawv cov kev xav tau luam ntawv. Qhov kev ywj pheej no tso cai rau cov lag luam tsim cov ntawv luam tawm hauv ntau yam xim thiab cov qauv tsim, txhim kho lawv cov kev siv zog tsim hom.
