Hadda oo ay jiraan suuqyo badan oo loogu talagalay hydroxypropyl carboxymethyl cellulose qiimuhuna aanu sinnayn, sida si fudud oo degdeg ah loogu go'aamiyo tayada hydroxypropyl carboxymethyl cellulose ayaa noqotay arrin muhiim ah! Haddaba sidee loo qiimeeyaa tayada hydroxypropyl methylcellulose? Waxa ugu horreeya ee la eego waa caddaanka hydroxypropyl cellulose; inkastoo caddaanku aanu go'aamin karin in HPMC uu ku habboon yahay in la isticmaalo, haddana qaar ka mid ah soosaarayaasha aan damiirka lahayn ayaa ku dari doona wakiil caddeynaya inta lagu jiro farsamaynta, taas oo saameyn doonta tayadiisa. Laakiin guud ahaan marka la hadlayo, inta badan ether-yada cellulose ee aadka u fiican waxay leeyihiin caddaan wanaagsan.
Marka labaad, waxay ku xiran tahay jilicsanaanta hydroxypropyl methylcellulose: cabbirka walxaha ee hydroxypropyl carboxymethyl cellulose waa 80-100 mesh, wax ka yar 120 mesh, iyo hydroxyethyl cellulose HECHPMC waa qiyaastii 100 mesh. Inta badan hpmc waa mesh 60-80. Guud ahaan, methyl cellulose jilicsan, ayaa kala firdhis wanaagsan.
Cadaynta cellulose ether ee xalka: ku rid HPMC biyo si aad u soo saarto xal colloidal ah oo hufan, cadaynta badan, cadaynta badan, walxaha aan milmi karin ee hooseeya.
Marka badeecada la kululeeyo, way isku ururtaa ama way dhalaaltaa ka dibna way dhalaaltaa. Waa mid biyo-diid ah oo milma. Shubka ayaa ah isku-xidhka ugu muhiimsan iyo nadiifinta walxaha ceeriin ee budada putty-ka ee biyaha u adkaysta. Mabda'a iska caabbinta biyaha waa sidan soo socota: marka budada latex-ka ee dib loo kala firdhiyo iyo sibidhka lagu qaso biyaha, budada latex-ka ayaa sii wadi doonta inay ku soo noqoto qaabkii emulsion-ka ee asalka ahaa, walxaha latex-ka ahna si siman ayay ugu firdhaan dareeraha sibidhka. Ka dib marka sibidhku la kulmo biyaha, falcelinta fuuq-baxa ayaa bilaabata, xalka Ca(OH)2-na wuxuu gaaraa dheregsanaan iyo kiristaalo ayaa soo daadanaya. Isla mar ahaantaana, kiristaalo ettringite iyo kalsiyum silicate hydrate colloids ayaa la sameeyaa, walxaha latex-kana waxaa lagu shubaa jelka On iyo walxaha sibidhka ee aan fuuq-baxsanayn, marka falgalka fuuq-celinta uu sii socdo, alaabada fuuq-celinta ayaa sii kordheysa, walxaha latex-kana si tartiib tartiib ah ayay ugu ururaan meelaha aan dabiiciga ahayn sida sibidhka, waxayna sameeyaan lakab cufan oo ku yaal dusha sare ee jelka sibidhka. , sababtoo ah hoos u dhaca tartiib tartiib ah ee qoyaanka qalalan, walxaha latex-ka ee si dhow isugu xiran ee ku jira jelka iyo daloolada ayaa isku ururaya si ay u sameeyaan filim joogto ah, iyagoo sameeya isku dar ah matrix-ka is-dhexgalka ee koollada sibidhka, isla markaana sameeya koollada sibidhka iyo budo kale. Isku-darka ayaa isku dheggan.
Waqtiga boostada: Maajo-11-2023