Nigute wakora ifu ya Melamine?

Bitewe numusaruro wa urea formaldehyde resin, iterambere ryinganda za melamine ryagize inzira yihuse.Inyandiko y'ubushakashatsi yatangaje bwa mbere synthesis ya melamine resin mu 1933. Isosiyete ya Amerika Cyanamide yatangiye gukora no kugurisha ifu ya melamine laminates hamwe na coatings n'ibindi mu 1939. Mu myaka ya za 1950 na 1960, Ubuyapani bwabonye inganda zuzuye mu ngandamelamine molding compound.Mu myaka ya za 1960, Ubushinwa bwatangiye kwinjiza ikoranabuhanga rya melamine.Nyuma yimyaka ibarirwa muri za mirongo yiterambere, ubushobozi bwibicuruzwa bya melamine ubu ni byo hejuru kwisi, bingana na 80 9/6 byimigabane ku isoko ryisi.

Kugirango umenye byinshi kubyerekeye ifu ya melamine, reka tubanze turebe uburyo bwo gukora ifu ya melamine.

Ibikoresho nyamukuru byibicuruzwa bya melamine ni melamine molding compound, izwi kandi nka melamine formaldehyde resin ifu cyangwa ifu ya melamine.Ibikoresho nyamukuru byifu ya melamine ni melamine resin ifite reaction nyinshi kandi ihuza.Melamine resin ni polymer nyinshi ya dandelion ikomatanyirizwa hamwe na reaction ya chimique ya melamine hamwe nigisubizo cyamazi ya formaldehyde mugihe gikabije.Ubusanzwe reaction ikorerwa mumashanyarazi ifite ibikoresho bikurura, bishyushya kandi byegeranye, mubisanzwe mubyiciro bibiri.

1. Intambwe yambere niyongera reaction.Ubwa mbere, ongeramo 37% yumuti wamazi ya fordehide kumitsi ya reaction hanyuma uhindure pH kuri 7-9 kugirango ubone uburyo butabogamye cyangwa bworoshye alkaline.Noneho shyiramo melamine ikwiye kugirango moore formaldehyde na melamine hagati ya 2 na 3. Ubushyuhe bwa reaktor bwarahinduwe kuburyo buhoro buhoro bugera kuri 60-85 ° C. Muri iki gihe, formaldehyde na melamine byahagaritswe na methylolation reaction , hanyuma umurongo wa melamine oligomer urimo amatsinda ya methylol 1 kugeza kuri 6.Igisubizo cyavuzwe haruguru nigisubizo kidashoboka exothermic reaction.Umubare munini wa formaldehyde, biroroshye gukora polymethylol melamine.

2. Intambwe ya kabiri ni reaction ya reaction.Mugihe cy'ubushyuhe bwo hejuru, methylol melamine ikora cyane irushijeho kuba etherifike cyangwa polycondensed kugirango itange umurongo uhuza umurongo wa resin urimo umurongo wa methylene cyangwa umurunga wa dimethylene.hakoreshejwe intramolecular cyangwa molekulari muburyo bwa acide acide.Iyo ingano ya methylol ari nto, umurunga wa methylene muri rusange uriganje;muri resin ishingiye ku masaka, muri rusange hashyizweho umurongo wa dimethylene ether, kandi hakabaho umurunga wa methylene.Iyo urwego rwinshi rwa reaction ya polycondensation reaction, niko kugabanuka kwamazi ya melamine formaldehyde resin yumuti kandi niko ubukonje bwiyongera.

Mubikorwa byavuzwe haruguru, uburemere bwa molekuline yibicuruzwa byanyuma bigenwa nuburyo bwihariye bwo kubyitwaramo, kandi amazi yo kugabanura ibicuruzwa nayo arahinduka cyane.Imiterere yibicuruzwa iraboneka cyane mubisubizo bya resin kubishobora gukemuka nabi kandi bitangirika kandi bidashoboka.Igisubizo cya resin gifite umutekano muke kandi ntabwo gifasha kubungabunga.Mu musaruro nyirizina, ukoreshwa kenshi nka substrate kandi nanone ibikoresho bidahinduka nka d-selile, ibiti byimbaho, silika, amabara yongeweho.Ikozwe mu ifu ikomeye nicyo bita ifu ya melamine na spray yumisha umupira.

Huafu Chemical nuru ruganda rutanga umusaruroifu ya melamine.Niba ubishaka, twandikireEmail : melamine@hfm-melamine.com