Cov ntaub ntawv tseem ceeb tshaj plaws thiab cov khoom tsim los rau kev sib cuag nrog cov khoom siv hauv cov khoom siv raw li PP, PE, thiablamination adhesivesua los ntawm polyurethane thiab luam ntawv inks rau tsim tsim. Cov ntaub ntawv siv los ntim cov zaub mov yuav tsum muaj kev nyab xeeb los ntawm cov ntsiab lus sib txawv. Cov zaub mov tsis raug tso cai rau kev sib cuag nrog cov kab mob sab nraud xws li kab mob, kab mob, lwm yam kab mob, cov av, yog li lub microstructure ntawm cov khoom ntim yuav tsum tsis txhob cia qhov kev phom sij no dhau mus thiab kis cov zaub mov.
Polypropylene muaj ib tug reticulated crystalline qauv uas yoga zoo barrier rau roj thiab cov pa paug. Yog li, cov khoom siv ntawm polypropylene yog siv dav hauv cov khoom ntim khoom noj, sib tham txog kev tiv thaiv zoo.
Tab sis qee tus neeg tsiv teb tsaws tuaj yeem tho cov qauv macromolecular ntawm cov polymers thiab tuaj yeem ua rau cov khoom noj. Xws li cov neeg tsiv teb tsaws chaw tuaj yeem yog cov khoom siv ntawm cov ntawv luam tawm thiab ntawmpolyurethane nplaum.
Polyurethane adhesives yog ib qho kev sib xyaw ntawm ob yam khoom uas ua haujlwm ntawm qhov kub ntawm 30 txog 50 degrees celsius ua haujlwm. Ob yam khoom no raug kev txom nyem cov txheej txheem polymerization, thiab nws ntxiv dag zog. Yog li no cov nplaum no yog siv los khi cov ntawv luam tawm polymer rau metalized polymer thiab ua rau pob khoom noj.
Nws yog lub npe hu hais tias rau ntim khoom noj nyob rau hauv wraps, thiab hnab, yog siv laminates. Nyiamcov khoom ntim khoom noj feem ntau muaj cov thawj substrate, xws li zaj duab xis, uas feem ntau yog nyias thiab pob tshab, thiab tuaj yeem luam tau, thiab lub substrate thib ob uas tuaj yeem ua lwm yam khoom ntawm cov ntaub ntawv yog thinner zaj duab xis txog 20 microns, ib daim ntawv hlau, cov khoom noj khoom haus. los yog ib zaj duab xis pob tshab.
Cov txheej txheem tsim nyog rau kev ntim khoom noj yog qhov tsis sib cuag nrog cov zaub mov vim muaj cov khoom siv ntau heev. Yog li, cov khoom siv zaj duab xis yuav yog polyolefin xws li LDPE, PE, lossis PP, lossis xws li PET, qhov thib ob substrate feem ntau yog lwm yam, feem ntau thicker polyolefin xws li metallised PP los yog PET siv tau.
