Raws li cov khoom ntim hloov tau yooj yim uas txuas ntxiv dov thiab txiav yooj yim, kev ua haujlwm ntawm yob zaj duab xis yog ze rau cov khoom siv hauv paus. Tam sim no, feem ntau cov yeeb yaj kiab yob hauv khw muag khoom siv polyolefin resins ua cov khoom siv tseem ceeb, ntxiv nrog cov khoom siv ntxiv lossis cov qauv sib xyaw kom tau raws li cov kev xav tau ntawm cov ntawv thov sib txawv rau pob tshab, sealing, huab cua tsis kam, thiab nqi.
Polyethylene (PE) yog ib qho ntawm cov khoom siv tshaj plaws rau yob zaj duab xis, tshwj xeeb tshaj yog qis - ntom polyethylene (LDPE) thiab linear low- ntom polyethylene (LLDPE). LDPE muaj cov ceg molecular ntau dua, muab cov yeeb yaj kiab zoo tshaj plaws, kev nthuav dav, thiab cua sov- sealing zog, ua rau nws haum rau ntim cov zaub mov tshiab thiab siav uas yuav tsum tau qis - kub, ceev sealing. LLDPE, vim nws cov qauv qauv molecular thiab luv luv - saw tis, ua kom zoo dua qub thiab tsim kua muag lub zog thaum tuav cov cua sov zoo- sealing kev ua tau zoo, thiab feem ntau yog siv los nqa cov khoom ntse ntse lossis muaj cov kua dej. By blending and modifying PE grades with different densities and melt flow rates, the stiffness and heat-sealing window of the film can be precisely controlled, expanding its applicability in cold chain and ambient temperature environments.
Polypropylene (PP) thiab nws cov copolymers kuj tau siv dav hauv yob zaj duab xis ntau lawm. PP muaj rigidity siab, kub tsis kam, thiab pob tshab. BOPP zaj duab xis, tshwj xeeb tshaj yog tsim los ntawm biaxial stretching, tswj cov yeeb yam zoo thaum muaj kev ruaj ntseg zoo dua thiab cov khoom thaiv, ua rau nws tsim nyog rau cov khoom ci, khoom qab zib, thiab lwm yam kev siv uas yuav tsum muaj siab gloss thiab noo noo tsis kam rau ncua sij hawm tso saib. Random copolymer polypropylene (RCP) txhim kho qis -kub kub- sealing kev ua tau zoo thaum tuav cov pob tshab, nthuav dav daim ntawv thov ntawm PP yob zaj duab xis hauv ntim khoom noj khov.
Dhau li ntawm ib qho - cov ntaub ntawv siv, ntau- txheej co-extrusion qauv yog ib txoj hauv kev los txhim kho tag nrho cov kev ua tau zoo ntawm yob zaj duab xis. Piv txwv li, cov yeeb yaj kiab sib xyaw siv PE ua cov cua sov- txheej txheej sealing, PP raws li cov txheej txheem nruab nrab, thiab EVOH lossis PA raws li txheej txheej thaiv tuaj yeem ua tiav ntau yam zoo hauv tib yob, suav nrog kev sib khi yooj yim, lub zog txhua yam, thiab cov khoom thaiv roj, ua tau raws li cov kev cai nruj rau lub neej txee thiab kev nyab xeeb nyob rau hauv siab - khoom noj khoom haus thiab khoom noj khoom haus. Xws li cov qauv sib xyaw cia siab rau kev sib raug zoo ntawm cov resins sib txawv thiab kev sib txuam ntawm cov txheej txheem ua kom muaj zog interlayer kev sib raug zoo thiab tshem tawm txoj kev pheej hmoo ntawm delamination.
Nyob rau hauv xyoo tas los no, kom ua raws li ib puag ncig kev xav, bio-raws li polyolefins (xws li polyethylene tau los ntawm qab zib ethanol) thiab biodegradable polymers (xws li PBAT thiab PLA) kuj tau pib siv los tsim cov yob zaj duab xis. Cov ntaub ntawv no, thaum tswj tau qee qhov kev hloov pauv ntawm cov txheej txheem, tuaj yeem txo qhov kev cia siab ntawm cov peev txheej fossil thiab degrade nyob rau hauv ib qho kev sib xyaw ua ke, muab txoj hauv kev tshiab rau kev rov ua dua ntawm ib zaug - siv ntim. Txawm li cas los xij, lawv cov nqi, kev tiv thaiv tshav kub, thiab cov khoom thaiv tseem xav tau kev txhim kho ntxiv kom nthuav dav lawv cov kev hloov pauv nrog cov tshuaj polyolefins.
Zuag qhia tag nrho, cov ntaub ntawv tseem ceeb rau yob zaj duab xis yog PE thiab PP thiab lawv cov ntau yam hloov kho, ntxiv los ntawm co-extrusion composites thiab tshiab bio-raws li cov ntaub ntawv, tsim ib tug multi- txheej, customizable kev ua tau zoo spectrum. Kev xaiv cov khoom yuav tsum muaj kev xav txog cov yam ntxwv ntawm cov khoom, cov txheej txheem ntim khoom, chaw cia khoom thiab kev thauj mus los, thiab kev tswj hwm kev txwv kom ua tiav qhov zoo tshaj plaws ntawm kev ua haujlwm thiab kev lag luam thiab kev ruaj khov.