PU adhesive yog cov nplaum uas siv dav hauv ntau qhov chaw. Nws lub npe tshuaj yog polyurethane nplaum, ua los ntawm cov tshuaj tiv thaiv ntawm polyols thiab isocyanates, ntawm lwm cov ntaub ntawv raw. PU nplaum muaj ntau yam khoom, nrog rau kev sib cog lus nruab nrab, kev laus ua haujlwm zoo, thiab siv tau yooj yim.
Cov khoom tseem ceeb ntawm PU nplaum muaj xws li polyols, isocyanates, cov kuab tshuaj, thiab cov khoom ntxiv. Polyols thiab isocyanates tau txais cov tshuaj tiv thaiv polymerization nyob rau hauv cov xwm txheej tshwj xeeb los tsim cov qauv polyurethane. Cov kuab tshuaj yog siv los kho cov viscosity ntawm cov nplaum, thaum cov khoom siv ntxiv yog siv los txhim kho qee yam khoom ntawm cov nplaum, xws li ua kom yooj yim los yog ua kom nrawm nrawm. Cov txheej txheem tshuaj lom neeg feem ntau tshwm sim hauv chav tsev kub lossis hauv qab cua sov, thiab cov tshuaj tiv thaiv tus nqi cuam tshuam los ntawm qhov kub thiab txias.
