Cov hnab ntim zaub mov feem ntau yog ua los ntawm polyethylene (PE), nrog qis - ntom polyethylene (LDPE) thiab linear low-density polyethylene (LLDPE) yog hom siv dav tshaj plaws. Polyethylene cov ntaub ntawv muab kev yooj yim zoo, pob tshab, dej tsis kam, thiab tshuaj lom neeg ruaj khov; lawv tsis nkag siab nrog cov zaub mov, ua rau lawv zoo tagnrho rau kev ntim khoom noj. Lub hnab ua los ntawm LDPE yog mos, ductile, thiab nyias rau qhov kov, ua rau lawv haum rau kev siv hauv tsev txhua hnub- xws li ntim zaub, txiv hmab txiv ntoo, thiab zaub mov siav. Nyob rau hauv sib piv, LLDPE muaj superior tensile lub zog thiab puncture kuj, kom ntseeg tau tias lub hnab tsis yooj yim dua los ntawm qhov hnyav thiab muab ntau dua durability thiab stability.
Ntxiv nrog rau polyethylene, qee lub hnab ntim khoom noj khoom haus yog tsim los ntawm polyvinyl chloride (PVC). Lub hnab PVC yog cov pob tshab thiab khi zoo rau qhov chaw, tso cai rau lawv nruj nreem qhwv cov zaub mov thiab txo qis cua, uas ua rau muaj txiaj ntsig zoo. Txawm li cas los xij, vim tias PVC ntau lawm feem ntau suav nrog kev siv cov khoom siv ntxiv xws li plasticizers, lub hnab ntim khoom noj yuav tsum ua raws li cov cai tswj kev nyab xeeb ntawm cov zaub mov nruj kom ntseeg tau tias tsis muaj cov khoom ntxiv nkag mus rau hauv cov zaub mov. Tam sim no, PE yog cov khoom siv tseem ceeb rau zaub mov- cov hnab khaws cia qib hauv khw vim nws qhov kev nyab xeeb zoo tshaj plaws thiab ntau yam kev siv.
Raws li cov txheej txheem ib puag ncig tau nruj zuj zus, cov khoom siv tshiab eco-cov phooj ywg tau raug coj los siv rau kev tsim cov hnab khaws cia. Cov ntaub ntawv biodegradable-xws li polylactic acid (PLA), PBAT, thiab hmoov txhuv nplej siab-raws li cov khoom sib xyaws- tuaj yeem maj mam decompose nyob rau hauv ib puag ncig tej yam kev mob, li no alleviating ib puag ncig lub nra tshwm sim los ntawm persistence ntawm tsoos plastics. Thaum cov ntaub ntawv no muaj qhov zoo ntawm ib puag ncig, kev txhim kho ntxiv hauv kev tiv thaiv tshav kub, kev ua kom yooj yim, thiab cov nqi tsim khoom yuav tsum tau ua kom tau raws li ntau qhov kev thov ua haujlwm.
Tshaj li cov ntaub ntawv yas, me me ntawm cov khoom siv raws li cov khoom siv ntxiv -xws li antioxidants, stabilizers, thiab xim masterbatches- tej zaum yuav raug muab tso ua ke los txhim kho cov yam ntxwv ntawm kev ua haujlwm thiab kev pom zoo. Txawm li cas los xij, muab cov qauv kev nyab xeeb siab rau zaub mov -cov ntaub ntawv tiv tauj, txhua yam khoom siv ntxiv yuav tsum ua raws li cov kev cai cuam tshuam. Txij li cov hnab khaws cia ua los ntawm cov khoom sib txawv sib txawv raws li qhov pom tseeb, tiv thaiv tshav kub, thauj khoom- muaj peev xwm, thiab kev cuam tshuam ib puag ncig, cov neeg siv khoom yuav tsum xaiv cov khoom zoo tshaj plaws rau lawv cov kev xav tau tshwj xeeb.