Hauv kev lag luam niaj hnub thiab lub neej niaj hnub, muag kov zaj duab xis tau siv dav vim tias nws cov kev ntxhib los mos tshwj xeeb. Nkag siab nws txoj kev sib xyaw yog tus yuam sij rau kev nkag siab tob ntawm cov khoom no.
Ib qho ntawm cov txheej txheem theem pib ntawm cov yeeb yaj kiab uas muag yog lub substrate. Cov substrates muaj xws li cov roj polymic muaj roj ntau li polyethylene thiab polypropylene. Cov substrates no tau zoo hloov tau zoo thiab ruaj khov thiab tuaj yeem muab kev txhawb nqa lub cev ntawm lub cev. Lawv tuaj yeem xaiv tau thiab hloov kho raws li cov ntawv thov uas yuav tsum tau ua kom tiav cov kev xav tau sib txawv. Piv txwv li, los ntawm kev kho cov molecular hnyav thiab crystallinity ntawm polyethylene, lub tensile lub zog thiab pob tshab ntawm zaj duab xis tuaj yeem txhim kho.
Cov ntxiv yog qhov tseem ceeb cuam tshuam rau kev ua yeeb yam ntawm cov yeeb yaj kiab kov. Kev siv yas yog ib qho ntawm cov siv sib ntxiv. Ntxiv qhov tsim nyog ntawm cov yas ua tuaj yeem txo cov kev sib tw sib xyaw ntawm cov polymers, ua kom cov zaj duab xis, thiab nce nws cov khoom siv yooj yim thiab kev sib xyaw. Tsis tas li ntawd, txhawm rau txhim kho cov khoom saum npoo av, roj nplua nyeem kuj tseem yuav ntxiv rau ua yeeb yaj kiab ua yeeb yaj kiab smoother thiab zoo dua rau kov. Nyob rau tib lub sijhawm, qhov sib ntxiv ntawm cov tshuaj antioxidants tuaj yeem tiv thaiv cov yeeb yaj kiab los ntawm kev ua raws li kev siv oxidation thaum siv thiab txuas nws lub neej pabcuam.
Cov txheej txheem kho saum npoo kuj tseem yog qhov tseem ceeb ntawm cov yeeb yaj kiab uas muag muag muag. Txoj kev kho txheej txheej no yog tsim los txuas ntxiv kom pom qhov kov tau zoo thiab ntxim nyiam ntawm zaj duab xis. Piv txwv li, los ntawm txheej txheem txheej txheej tshwj xeeb, ib txheej ntawm cov metvis-conve-conve-conve-conven, uas nce cov kev sib txhuam thiab ua rau nws nyiam kov. Ib qho ntxiv, kev kho deg kuj tseem tuaj yeem txhim kho cov luam ntawv yoog tau ntawm zaj duab xis, ua rau nws yooj yim los luam tawm ntau cov qauv thiab cov cim ntawm nws.
Hauv cov ntawv thov sib txawv, cov qauv sib xyaw ntawm cov zaj duab xis kov yuav raug hloov kho. Tab sis feem ntau, cov kev xaiv tsim nyog thiab ua ke ntawm substrate, ntxiv thiab cov txheej txheem kho saum npoo yog tus yuam sij ua ib zaj duab xis nrog cov muag muag zoo heev thiab kev ua tau zoo. Nrog kev nce qib nruam ntawm kev tshawb fawb thiab thev naus laus zis, nws ntseeg tau tias kev ua yeeb yaj kiab kov txuas ntxiv yuav txuas ntxiv ua kom yooj yim thiab txhim kho kom yooj yim dua thiab xav tsis thoob rau tib neeg lub neej.
