Melamine- daim ntawv impregnated veneer sawv cev rau kev sib tshuam ntawm chemistry thiab industrial manufacturing, ua ib qho tseem ceeb ib nrab -cov khoom tiav hauv kev tsim cov rooj tog zaum, hauv pem teb, thiab cov vaj huam sib luag zoo nkauj. Tsis zoo li cov khoom siv kho kom zoo nkauj uas muaj tshuaj lom neeg tsis zoo, daim ntawv no tseem nyob hauv lub xeev nquag txij li lub sijhawm nws tawm ntawm txoj kab impregnation mus txog thaum kawg raug rau qhov kub thiab txias ntawm cov xovxwm kub. Vim hais tias cov melamine resin nyob rau hauv cov ntawv fibers tsuas yog kho ib feem xwb - ib lub xeev feem ntau hu ua B-theem- cov ntaub ntawv yog txawv tshaj plaw rau nws ib puag ncig. Cov tshuaj volatility no txhais tau hais tias txoj kev uas nws khaws cia thiab tswj tau ncaj qha dictates qhov zoo ntawm lub rooj zaum kawg tiav, ua kom nruj huab cua tswj tsis yog - qhov yuav tsum tau sib tham rau tej chaw tsim khoom loj.
Ob qhov kev hloov pauv tseem ceeb tshaj plaws hauv kev tswj cov khoom no yog kub thiab av noo. Yog tias cov xwm txheej no tsis zoo sib npaug, cov resin tuaj yeem hloov pauv tsis tau lub cev thiab tshuaj hloov mus ntev ua ntej nws mus txog cov kab ntau lawm. Cov txheej txheem kev lag luam hais tias daim ntawv veneer yuav tsum tau muab khaws cia rau hauv huab cua -tswj lub tsev khaws khoom khaws cia ntawm qhov kub ntawm 18 txog 25 degrees Celsius, nrog rau cov av noo nyob ib puag ncig ntawm 50 thiab 60 feem pua. Thaum qhov chaw khaws cia kub dhau lawm, cov resin pib kho ntxov ntxov hauv qhov tshwm sim hu ua pre-kho. Qhov no ua rau cov resin hardens mus rau qhov chaw uas nws tsis tuaj yeem liquefy thiab ntws zoo thaum lub sij hawm nias, ua rau ib qho chaw uas zoo li npub, tsis sib xws, los yog muaj kev delamination. Hloov pauv, yog tias huab cua qhuav dhau lawm, daim ntawv ua nkig thiab poob nws qhov tsim nyog yooj, ua rau tawg thiab kua muag thaum lub sijhawm txiav thiab thauj khoom. Ntawm qhov kawg ntawm lub spectrum, cov av noo ntau dhau yog qhov sib npaug. Melamine resin yog ib txwm hygroscopic, lub ntsiab lus nws absorbs noo noo los ntawm huab cua. Yog tias daim ntawv ntub dej dhau lawm, cov dej ntws tawm yuav nrawm nrawm rau hauv chav thaum nws tsoo cov xovxwm kub, ua rau cov npuas tsis zoo, lub hnab ntim khoom, thiab cov khoom tsis zoo sab hauv uas cuam tshuam rau lub rooj tsav xwm kev ncaj ncees thiab kev zoo nkauj.
Tshaj li kev ruaj ntseg ib puag ncig, qhov tseem ceeb ntawm lub sijhawm ua lub luag haujlwm tseem ceeb hauv kev muaj peev xwm ntawm melamine - daim ntawv impregnated. Vim hais tias cov tshuaj tiv thaiv nyob rau hauv cov resin yog ib txwm maj mam nce mus, cov khoom muaj ib tug txwv lub txee lub neej, feem ntau ntawm peb mus rau rau lub hlis nyob ntawm seb cov resin formulation thiab muaj tej catalysts los yog additives. Yuav kom tswj tau qhov kev lwj no, cov tuam txhab lag luam yuav tsum ua kom nruj ua ntej -hauv, ua ntej- tawm cov khoom muag. Siv cov khoom qub tshaj plaws ua ntej kom paub meej tias daim ntawv siv tau thaum nws cov tshuaj reactivity tseem nyob rau ntawm nws qhov kev ua tau zoo tshaj plaws, tiv thaiv cov khib nyiab cuam tshuam nrog cov khoom siv tas mus li uas tau poob lawv lub peev xwm sib txuas.
Lub cev tuav ntawm daim ntawv yog lwm qhov chaw uas yuav tsum tau precision. Vim tias cov tshuaj kho ib nrab yog qhov tsis yooj yim, txhua yam kev ntxhov siab ntawm lub cev xws li folding, creasing, lossis kev tuav ntxhib tuaj yeem tsim micro- pob txha hauv cov txheej resin. Cov cim no tsis yog ib ntus xwb; lawv tau raug kaw mus tas li rau hauv qhov chaw tiav thaum lub rooj tsavxwm raug nias, feem ntau tshwm sim li kab dawb lossis streaks uas kho tsis tau. Txhawm rau tiv thaiv kev puas tsuaj ntawm lub cev thiab kev hloov pauv ib puag ncig, nws yog ib qho tseem ceeb uas yuav tsum khaws cov ntawv hauv nws qhov qub, noo noo- pov thawj yas ntim kom txog rau thaum lub sijhawm nws xav tau ntawm cov kab ntau lawm. Qhov kev tiv thaiv kev tiv thaiv no ua raws li kev tiv thaiv zaum kawg tiv thaiv kev sib tsoo ntawm cov dej noo los yog plua plav paug.
Rau loj -tej kev lag luam kev lag luam, kev tswj kom zoo txuas mus rau hauv chav kuaj los ntawm kev saib xyuas ntawm ob qhov kev ntsuas tseem ceeb: cov ntsiab lus tsis hloov pauv thiab ntws. Cov ntsiab lus tsis muaj zog ntsuas qhov dej noo thiab qis -molecular- hnyav cov khoom uas yuav evaporate thaum lub sij hawm nias, thaum flowability ntsuas qhov deb ntawm liquefied resin tuaj yeem mus rau hauv lub qhov hws ntawm lub substrate, xws li particleboard lossis MDF. Kev sim tsis tu ncua cov kev txwv no ua ntej siv daim ntawv tso cai rau cov chaw tsim khoom kho lawv lub voj voog nias- kho qhov kub, siab, thiab lub sijhawm- kom phim cov xwm txheej ntawm daim ntawv. Los ntawm kev ua raws li cov txheej txheem khaws cia thiab tuav cov txheej txheem, cov neeg tsim khoom rooj tog tuaj yeem txo cov khoom pov tseg, ua kom zoo dua lawv cov kev tsim khoom, thiab xyuas kom meej tias txhua lub rooj tsavxwm tawm hauv lub Hoobkas nrog qhov tsis zoo, ruaj khov.
