Saboda tsarin samar da resin urea formaldehyde, ci gaban masana'antar melamine ya sami tsari mai sauri.Daftarin binciken ya fara bayar da rahoton hadakar melamine resin a cikin 1933. Kamfanin Cyanamide na Amurka ya fara samarwa da sayar da laminates foda na melamine da sutura da sauransu a cikin 1939. A cikin 1950s da 1960s, Japan ta fahimci cikakken masana'antu na masana'antu.melamine gyare-gyaren fili.A cikin shekarun 1960, kasar Sin ta fara bullo da fasahar samar da sinadarin melamine.Bayan shekaru da yawa na ci gaba, ƙarfin samar da samfuran melamine yanzu shine mafi girma a duniya, yana lissafin sama da 80 9/6 na kasuwar duniya.
Don ƙarin sani game da melamine foda, bari mu dubi tsarin samar da melamine foda na farko.
Babban albarkatun kayan melamine shine melamine gyare-gyaren fili, wanda kuma aka sani da melamine formaldehyde resin foda ko melamine foda.Babban albarkatun kasa na melamine foda shine melamine resin tare da babban reactivity da crosslinkability.Gudun melamine shine babban-dandelion polymer wanda aka haɗa ta hanyar sinadarai na melamine da maganin formaldehyde mai ruwa a ƙarƙashin tsauraran yanayi.Yawanci ana yin maganin ne a cikin na'urar reactor sanye take da na'urar motsa jiki, dumama da sanyaya, gabaɗaya a matakai biyu.
1. Mataki na farko shine ƙarawa.Na farko, ƙara 37% na ruwa formaldehyde bayani a cikin jirgin ruwa dauki kuma daidaita pH zuwa 7-9 don samun tsaka tsaki ko rauni alkaline matsakaici.Sa'an nan kuma ƙara adadin melamine da ya dace don yin moore formaldehyde da melamine tsakanin 2 da 3. An daidaita zafin jiki na reactor don a hankali ya yi zafi zuwa 60-85 ° C. A wannan lokacin, formaldehyde da melamine sun toshe ta hanyar methylolation dauki. , kuma an kafa oligomer melamine na layi wanda ya ƙunshi 1 zuwa 6 ƙungiyoyin methylol.Halin da ke sama shine halayen exothermic maras samuwa.Mafi girman adadin formaldehyde, mafi sauƙin shine samar da polymethylol melamine.
2. Mataki na biyu shine yanayin daɗaɗɗa.Ƙarƙashin yanayin zafin jiki, methylol melamine mai saurin amsawa yana ƙara etherified ko polycondensed don samar da mahadin guduro mai linzamin da ke da alaƙa da ke ɗauke da haɗin methylene ko haɗin ether dimethylene.ta hanyar intramolecular ko kwayoyin halitta a cikin matsakaiciyar acidic.Lokacin da adadin ƙungiyar methylol ya ƙanƙanta, haɗin methylene yana da rinjaye;a cikin guduro mai tushen sorghum, haɗin ether na dimethylene gabaɗaya yana samuwa, kuma haɗin methylene yana samuwa.Matsakaicin matakin daɗaɗɗen halayen polycondensation, ƙananan solubility na ruwa na melamine formaldehyde guduro bayani kuma mafi girma danko.
A cikin tsarin amsawa na sama, nauyin kwayoyin halitta na samfurin ƙarshe yana ƙayyade ta takamaiman yanayin amsawa, kuma ana canza ruwa na samfurin sosai.Siffofin samfur suna samuwa ko'ina daga mafita na guduro zuwa daskararru maras narkewa da maras narkewa kuma maras narkewa.Maganin resin yana da rashin kwanciyar hankali kuma ba shi da amfani don adanawa.A cikin samarwa na ainihi, ana amfani da shi sau da yawa a matsayin maɗaukaki da kuma kayan da ba a haɗa su ba kamar d-cellulose, ɓangaren litattafan almara, silica, masu launi.Ana yin shi ta zama mai kauri wanda ake kira melamine foda ta injin busasshen ball na feshi.
Huafu Chemicals shine irin wannan masana'anta da ke samarwamelamine guduro foda.Idan kuna sha'awar, da fatan za a tuntuɓe muEmail : melamine@hfm-melamine.com
Lokacin aikawa: Satumba-20-2019