Cov khob ntawv feem ntau coated nrog ib txheej nyias ntawm cov yas los yog siv quav ciab los muab kev ua haujlwm ntxiv thiab txhim kho lawv cov kev ua tau zoo. Cov txheej txheej ua haujlwm rau ntau lub hom phiaj, xws li kev txhim kho rwb thaiv tsev, tiv thaiv daim ntawv kom tsis txhob soggy, thiab txhim kho lub khob lub peev xwm kom muaj dej. Cov ntaub ntawv txheej tshwj xeeb tuaj yeem sib txawv, tab sis ntawm no yog qee hom:
Polyethylene (PE): Polyethylene yog ib hom yas uas feem ntau siv los ua txheej rau cov khob ntawv. Nws muab kev tiv thaiv dej noo, ua rau lub khob tiv thaiv kom tsis txhob yaig thiab txhim kho nws lub zog tag nrho. PE-coated ntawv khob yog dav siv rau ob qho tib si kub thiab txias dej haus.
Polyethylene Terephthalate (PET): PET yog lwm hom yas siv los ua txheej rau ntawv khob. Nws yog lub npe hu rau nws clarity thiab durability. PET-coated khob feem ntau yog siv rau cov dej txias thiab yog pob tshab, tso cai rau cov ntsiab lus pom.
Polyethylene thiab PLA Blend: Qee cov tuam txhab lag luam ib puag ncig siv kev sib xyaw ntawm polyethylene thiab polylactic acid (PLA), uas yog cov khoom siv biodegradable thiab compostable tau los ntawm cov nroj tsuag. Qhov kev sib xyaw no yog tsim los muab qee qhov txiaj ntsig ntawm cov txheej txheem yas thaum sib xyaw ua ke ib puag ncig tus phooj ywg ntau dua.
Wax Txheej: Qee zaum, cov khob ntawv yuav raug coated nrog ib txheej ntawm cov quav ciab, feem ntau yog paraffin wax lossis carnauba wax. Wax muab dej tsis kam thiab pab tiv thaiv daim ntawv kom tsis txhob saturated.
