Ko te kaupapa o tenei tenenga ko te whakarato i tetahi tikanga mo te whakapai ake i te mahi tukatuka me te oranga hua opaura whakarewa melaminenga hua, te penapena rauemi, te whakanui ake i te tae o nga hua whakarewa, me te whakapai ake i te rereketanga o nga hua whakarewa.
Ko te tikanga whakarite ko te whakarite i te waahanga A, te whakarite waahanga B me te whakarite hua kua oti.
He takahanga whakareri wae
1. Tauhohenga: I roto i te reactor, ka hangaia te kapia formaldehyde ki te 38% wairewa formaldehyde i roto i te waahanga, ka whakatikahia te uara pH ki te 8.5 i roto i te reactor, katahi ka taapirihia te melamine kia rite ki te tauhohenga.Te wera ki te 90°C ki te pito mutunga;
2. Te pokepoke: I muri i te whakamatao ki te 70°C, hoatu te tauhohenga ki roto i te pokepoke, me te tapiri i te muka penupenu rakau me te poaka A kia rite ki te ōwehenga pokepoke.
3. Te whakamaroke: I muri i te pokepoke, tomo ki te oumu mo te whakamaroke.Ka tangohia e te oumu he whitiki mata oumu wera wera, ka whakamarokehia ki te hau wera i te 85°C, ka whakahaeretia te makuku i raro iho i te 3.5% ki te whiwhi rauemi maroke.
4. Te mira paoro: tukua atu nga mea kua maroke ki te mira paoro, taapirihia he hinu whakahinuhinu, he rongoa rongoa, he titanium dioxide me te pigment A i roto i te rahinga, me te whakaoti i te densification me te tae ma te mira poroporo i roto i te 9 haora;
Te takahanga o te waahanga B
He rereke te tae o te waahanga B ki te waahanga A, engari he rite tonu nga takahanga takahanga.
Kua oti te whakarite hua: whakakotahi i te wahanga A me te wahanga Bpaura melamine, ka kohia ki roto i te putea pepa kua kapi ki te kiriata.Me penapena te paura kua oti ki te waahi i raro iho i te 25°C.
Wā tuku: Noema-25-2020