Yas tsev xog paj zaj duab xis yog cov khoom siv tseem ceeb hauv kev ua liaj ua teb. Txij li thaum lub tsev cog khoom yas ncaj qha hu rau lub teeb pom kev zoo, cov teeb meem ntawm thermal oxidation aging thiab photoaging yuav tsum xav txog. Yog li ntawd, cov yas siv nyob rau hauv lub tsev xog paj zaj duab xis yuav tsum tau ntxiv nrog anti-aging additives los txhim kho nws tsis kam mus rau lub teeb thiab oxygen. ruaj khov. Kab lus no yuav qhia cov neeg nyeem txog kev xaiv kev tiv thaiv kev laus ntawm PE tsev xog paj zaj duab xis.
Lub zog txhua yam ntawm PE tsev xog paj zaj duab xis yog qhov siab. Feem ntau, LDPE resin nrog cov yaj ntws tsawg dua 1g / 10min, lossis kev sib xyaw ntawm LDPE thiab 25 feem pua ~ 50 feem pua LLDPE raug xaiv. Vim muaj cov qib siab ntawm cov ceg ntawm LDPE molecular saw, cov molecules tau yooj yim yees duab-oxidative laus. Tsis tas li ntawd, kev siv ib puag ncig ntawm lub tsev xog paj zaj duab xis yog qhov hnyav, thiab nws raug rau lub hnub ntev. Yog li ntawd, nws txoj kev tiv thaiv kev laus yuav tsum tau tsom mus rau kev ruaj ntseg ntawm lub teeb thiab oxygen.
Rau lub teeb stabilizers, UV-531, UV-327, UV-326, HALS, BAD thiab salicylates feem ntau yog siv hauv PE. Nyob rau hauv cov tshuaj tiv thaiv kev laus ntawm PE tsev xog paj zaj duab xis, HALS lub teeb stabilizers feem ntau zoo dua li UV absorbers thiab UV quenchers, thiab HALS lub teeb stabilizers tuaj yeem zam kev siv UV quenchers uas muaj cov hlau hnyav. cuam tshuam. Yog li ntawd, HALS-raws li lub teeb-stabilizing system yog tsuas yog siv nyob rau hauv lub formulation. Feem ntau, cov polymeric hindered amine teeb stabilizer BW-10LD feem ntau yog siv. Nws muaj lub teeb pom kev zoo thiab thermal stability, thiab muaj dej zoo extraction kuj, uas yog ntau lub hom phiaj.
Antioxidants feem ntau siv hauv PE feem ntau suav nrog antioxidant CA, antioxidant 1010, antioxidant 168, antioxidant 1076, thiab lwm yam.
Kev sib xyaw ua ke ntawm Antioxidant 1010 / Antioxidant 168 los yog Antioxidant 1076 / Antioxidant 168 muaj cov nyhuv synergistic zoo thiab yog ib qho kev ua haujlwm zoo antioxidant uas feem ntau siv hauv polyolefin plastics.
Piv txwv li, thaum lub tuam txhab siv cov khoom sib xyaw ntawm LDPE thiab LLDPE los tsim cov yeeb yaj kiab hauv tsev cog khoom, nws cov txheej txheem tiv thaiv kev laus siv antioxidant 1076, antioxidant 168, GW-480, UV-531, thiab qhov ntau npaum li cas yog 0.2 ntu. Tom qab lub tsev xog paj zaj duab xis yog them los ntawm lub tsev xog paj rau 10 lub hlis, qhov tuav tus nqi ntawm longitudinal thiab transverse tensile lub zog ntawm zaj duab xis yog tshaj 70 feem pua, thiab tus nqi tuav ntawm lub elongation ntawm so yog tshaj 80 feem pua.
