Cov Resins UV-Kho Tau Hauv Dej Rau Kev Siv Ntoo Hauv Kev Lag Luam

Cov tshuaj lom neeg UV los ntawm dej (WB) tau pom tias muaj kev loj hlob zoo hauv kev lag luam ntoo sab hauv tsev vim tias cov thev naus laus zis muab kev ua tau zoo heev, cov pa phem tsawg thiab kev ua haujlwm ntau ntxiv. Cov txheej txheem UV coatings muab rau cov neeg siv kawg cov txiaj ntsig ntawm kev tiv thaiv tshuaj lom neeg thiab khawb zoo heev, kev tiv thaiv thaiv zoo heev, VOCs qis heev thiab cov khoom siv me me nrog qhov chaw cia khoom tsawg dua. Cov txheej txheem no muaj cov khoom uas sib piv zoo nrog ob-component urethane systems yam tsis muaj teeb meem ntawm cov kab sib txuas txaus ntshai thiab kev txhawj xeeb txog lub neej ntawm lub lauj kaub. Lub kaw lus tag nrho yog tus nqi tsim nyog vim tias kev nce ceev ntawm kev tsim khoom thiab cov nqi zog qis dua. Cov txiaj ntsig zoo ib yam no tuaj yeem pab tau rau cov ntawv thov sab nraud ntawm lub Hoobkas suav nrog cov qhov rai thiab qhov rooj, siding thiab lwm yam millwork. Cov ntu lag luam no feem ntau siv cov acrylic emulsions thiab polyurethane dispersions vim tias lawv muaj qhov ci ntsa iab zoo heev thiab khaws xim, thiab qhia txog kev ruaj khov zoo dua. Hauv kev tshawb fawb no, polyurethane-acrylic resins nrog UV functionality tau raug soj ntsuam raws li cov lus qhia kev lag luam rau ob qho tib si sab hauv thiab sab nraud kev lag luam ntoo.

Muaj peb hom tshuaj pleev xim uas siv cov kuab tshuaj feem ntau siv rau hauv kev siv ntoo hauv kev lag luam. Nitrocellulose lacquer feem ntau yog cov khoom sib xyaw ua ke ntawm nitrocellulose thiab roj lossis roj-based alkyds. Cov tshuaj pleev xim no qhuav sai thiab muaj peev xwm ci ntsa iab. Lawv feem ntau siv rau hauv cov rooj tog hauv tsev. Lawv muaj qhov tsis zoo ntawm kev daj thaum lub sijhawm thiab tuaj yeem ua rau tawg yooj yim. Lawv kuj tsis muaj zog tiv thaiv tshuaj lom neeg. Nitrocellulose lacquers muaj VOCs siab heev, feem ntau ntawm 500 g / L lossis siab dua. Pre-catalyzed lacquers yog cov sib xyaw ntawm nitrocellulose, roj lossis roj-based alkyds, plasticizers thiab urea-formaldehyde. Lawv siv cov tshuaj ua kom tsis muaj zog xws li butyl acid phosphate. Cov tshuaj pleev xim no muaj lub sijhawm khaws cia kwv yees li plaub lub hlis. Lawv siv rau hauv chaw ua haujlwm, tsev kawm ntawv thiab rooj tog hauv tsev. Pre-catalyzed lacquers muaj cov tshuaj tiv thaiv zoo dua li nitrocellulose lacquers. Lawv kuj muaj VOCs siab heev. Conversion varnishes yog cov sib xyaw ntawm roj-based alkyds, urea formaldehyde thiab melamine. Lawv siv cov tshuaj ua kom muaj zog xws li p-toluene sulfonic acid. Lawv muaj lub sijhawm siv tau ntev li ntawm 24 txog 48 teev. Lawv siv rau hauv cov txee hauv chav ua noj, rooj tog hauv chaw ua haujlwm thiab cov rooj tog hauv tsev. Cov xim pleev xim hloov pauv muaj cov yam ntxwv zoo tshaj plaws ntawm peb hom tshuaj pleev xim uas feem ntau siv rau ntoo kev lag luam. Lawv muaj VOCs thiab formaldehyde emissions siab heev.

Cov acrylic emulsions uas ua los ntawm dej thiab polyurethane dispersions yog cov lwm txoj hauv kev zoo rau cov khoom siv solvent rau kev siv ntoo hauv kev lag luam. Acrylic emulsions muaj kev tiv thaiv tshuaj lom neeg thiab thaiv zoo heev, qhov nyuaj siab dua, kev ruaj khov zoo heev thiab kev tiv taus huab cua, thiab kev nplaum zoo dua rau cov chaw tsis muaj qhov. Lawv muaj lub sijhawm qhuav sai, ua rau lub txee, rooj tog lossis cov chaw tsim khoom siv los tuav cov khoom sai sai tom qab siv. PUDs muaj kev tiv thaiv kev sib txhuam zoo heev, kev ywj pheej, thiab kev tiv thaiv khawb thiab kev puas tsuaj. Lawv yog cov khub zoo sib xyaw nrog acrylic emulsions los txhim kho cov khoom siv kho tshuab. Ob qho tib si acrylic emulsions thiab PUDs tuaj yeem cuam tshuam nrog cov tshuaj lom neeg sib txuas xws li polyisocyanates, polyaziridine lossis carbodiimides los tsim cov txheej 2K nrog cov khoom zoo dua.

Cov txheej txheem UV-curable hauv dej tau dhau los ua cov kev xaiv nrov rau kev siv ntoo hauv kev lag luam. Cov chaw tsim khoom txee hauv chav ua noj thiab rooj tog xaiv cov txheej txheem no vim tias lawv muaj kev tiv thaiv zoo heev thiab cov khoom siv kho tshuab, cov khoom siv zoo heev thiab cov pa phem tsawg heev. WB UV txheej txheem muaj kev tiv thaiv thaiv zoo heev tam sim ntawd tom qab kho, uas tso cai rau cov khoom coated kom raug teeb tsa, ntim khoom thiab xa tawm ntawm cov kab ntau lawm yam tsis muaj sijhawm nyob rau kev txhim kho qhov nyuaj. Kev txhim kho qhov nyuaj hauv WB UV txheej txheem yog qhov ua tau zoo heev thiab tshwm sim hauv vib nas this. Kev tiv thaiv tshuaj lom neeg thiab cov xim ntawm WB UV txheej txheem yog qhov zoo dua li cov kua roj vanish hloov pauv raws li cov kuab tshuaj.

Cov txheej WB UV muaj ntau yam zoo. Thaum 100%-khoom UV oligomers feem ntau muaj viscosity siab thiab yuav tsum tau diluted nrog cov tshuaj diluents reactive, WB UV PUDs muaj viscosity qis, thiab viscosity tuaj yeem hloov kho nrog cov tshuaj WB rheology modifiers ib txwm muaj. WB UV PUDs muaj qhov hnyav molecular siab thaum pib thiab tsis tsim qhov hnyav molecular thaum lawv kho tau zoo li 100% khoom UV coatings. Vim tias lawv muaj me ntsis lossis tsis muaj shrinkage thaum lawv kho, WB UV PUDs muaj kev sib txuas zoo heev rau ntau lub substrates. Qhov ci ntsa iab ntawm cov txheej no yooj yim tswj nrog cov neeg sawv cev matting ib txwm muaj. Cov polymers no tuaj yeem nyuaj heev tab sis kuj yooj ywm heev, ua rau lawv zoo tagnrho rau cov txheej ntoo sab nraud.