Barrier films yog ntau- txheej zaj duab xis uas tsim los ntawm extruding ib cov khoom uas muaj zog gas barrier zog nrog ib tug polyolefin khoom uas muaj zog cua sov- sealing thiab ya raws barrier zog. Lawv muaj cov khoom thaiv zoo heev thiab tau siv dav hauv kev ntim khoom noj, ntim tshuaj, khoom siv hluav taws xob encapsulation, thiab ntau lwm yam. Hauv qab no yog cov lus qhia ntxaws ntxaws rau ntau hom kev thaiv cov yeeb yaj kiab.
PVA-Coated High-Barrier Film
PVA-coated high-pab zaj duab xis yog tsim los ntawm txheej PVA (nrog ntxiv nano- cov ntaub ntawv tsis muaj organic) mus rau polyethylene zaj duab xis, ua raws li kev luam ntawv thiab lamination. Nws muaj cov yam ntxwv ntawm cov pa oxygen tsis tshua muaj zog, qhov ua tau zoo tshaj qhov cuam tshuam kev ua haujlwm piv rau lwm cov yeeb yaj kiab zoo sib xws, thiab txo cov nqi ntim ntau heev. Cov yeeb yaj kiab no tuaj yeem siv tsis tau tsuas yog rau ntim cov khoom noj ua kua xws li dej haus, kua txiv hmab txiv ntoo, thiab mis nyuj, tab sis kuj tseem siv rau cov khoom ntim xws li kua ntses thiab vinegar.
PVDC High-Barrier Film
PVDC siab-barrier zaj duab xis yog ib qho ntawm cov khoom siv dav siv siab tshaj -barrier ntim cov ntaub ntawv. Nws nta qis permeability, muaj zog barrier zog, thiab tshuaj tiv thaiv. PVDC-coated zaj duab xis muaj kev cuam tshuam zoo heev thiab pheej yig, ua rau nws siv dav hauv ntim ntim thiab khaws cia ntim rau ntau yam khoom noj. Txawm li cas los xij, nws cov phooj ywg ib puag ncig yog qee qhov txwv vim muaj cov tshuaj chlorine hauv PVDC.
EVOH High-Barrier Film
EVOH siab-barrier zaj duab xis yog ib yam khoom uas muaj roj barrier zoo heev. Nws txoj kev ua haujlwm tsis zoo nyob ntawm cov ntsiab lus ethylene, thiab nws kuj khav theeb zoo heev, gloss, thiab txhua yam muaj zog. Hauv kev lag luam ntim khoom, EVOH feem ntau yog siv los ua cov txheej txheem nruab nrab hauv cov yeeb yaj kiab sib xyaw los txhim kho tag nrho cov teeb meem ntawm kev ntim khoom. Tsis tas li ntawd, EVOH kuj tseem siv tau los ua ib qho - txheej zaj duab xis rau cov kev xav tau ntim tshwj xeeb.
Lwm Hom Barrier Films Dhau li ntawm peb cov yeeb yaj kiab uas tau hais los saum toj no, kuj tseem muaj nylon-raws siab- cov yeeb yaj kiab thaiv, cov yeeb yaj kiab tsis muaj zog oxide coated, thiab lwm yam. Cov yeeb yaj kiab no txhua tus muaj lawv tus kheej cov yam ntxwv ntawm cov khoom thaiv, cov khoom siv kho tshuab, thiab qhov kub thiab txias, thiab tuaj yeem xaiv thiab siv raws li cov kev xav tau tshwj xeeb.
