Hydroxypropyl methylcellulose waxaa loo isticmaalaa sidii substrate ceeriin ah si loo soo saaro saliid, kaas oo xaqiijin kara isticmaalka sonkorta guud, hagaajin kara heerka isticmaalka walxaha ceeriin, yareyn kara xaddiga haraaga ah ee substrate-ka ee maraqa halsano, iyo yareynta kharashka daaweynta biyaha wasakhda ah. hydroxypropyl methylcellulose-kan Astaanta ugu weyn waxay ku habboon tahay hagaajinta dufcadda, dufcadda la quudiyo iyo hababka halsano ee joogtada ah, iyadoo laga fogaanayo dhibaatooyin taxane ah sida xakamaynta halabuurka dhexdhexaadka ah iyo heerka barxidda; sidoo kale waxay ku habboon tahay nidaaminta habka halsano.
Hydroxypropyl methylcellulose, cellulose-ka ceeriin ah, waxaa lagu sifeyn karaa suuf ama saxarka alwaaxa. Aad ayey lagama maarmaan u tahay in la burburiyo ka hor inta aan la alkaliin ama inta lagu jiro alkaliin. Burburinta waa in lagu burburiyo walxaha ceeriin ee cellulose iyadoo la adeegsanayo tamar farsamo. Qaab-dhismeedka xaaladda isku-darka ee macromolecules-ka cellulose wuxuu yareyn karaa heerka crystallinity iyo polymerization, wuxuu kordhin karaa aagga dusha sare, sidaas darteedna wuxuu hagaajin karaa helitaanka iyo awoodda falcelinta kiimikada ee falgalka falcelinta ee saddexda kooxood ee hydroxyl ee kooxda giraanta gulukooska ee macromolecule-ka cellulose.
In kasta oo mabda'a isku-darka ee etherification-ka hydroxypropyl methylcellulose uusan ahayn mid adag, haddana deegaannada kala duwan ee alkalization-ka, burburinta walxaha ceeriin ah, etherification-ka, soo kabashada dareeraha, kala-soocidda centrifugal-ka, dhaqidda iyo qallajinta waxay ku lug leeyihiin tiro badan oo tignoolajiyado muhiim ah iyo macnooyin aqoon leh. Noocyada kala duwan ee alaabada, deegaan kastaa wuxuu leeyahay xaaladaha xakamaynta ugu dambeeyay, sida heerkulka, waqtiga, cadaadiska iyo xakamaynta socodka walxaha. Qalabka kaaliyaha ah iyo qalabka xakamaynta ayaa ah dammaanad wanaagsan oo loogu talagalay tayada badeecada oo deggan iyo nidaamyada wax soo saarka ee la isku halleyn karo.
Maadaama waxqabadka hydroxypropyl methylcellulose uu la mid yahay ether-yada kale ee biyaha ku milma, waxaa loo isticmaali karaa rinjiga latex iyo qaybaha rinjiga resin-ka ee biyaha ku milma sida wakiilka sameeya filimada, dhumuc-saare, emulsifier iyo xasiliye.
Ka dhig filimka dahaadhka mid leh iska caabin wanaagsan oo xirasho, heer iyo dhegdheg, oo hagaaji xiisadda dusha sare, xasilloonida aashitada iyo alkali, iyo iswaafajinta midabada birta ah. Hydroxypropyl methylcellulose waxay leedahay saameyn wanaagsan oo ah dhumuc weyn rinjiga polyvinyl acetate ee ku salaysan biyaha cad. Heerka beddelka ether cellulose ayaa la kordhiyaa, iska caabbinta nabaad-guurka bakteeriyada ayaa sidoo kale la kordhiyaa.
Waqtiga boostada: Diseembar-22-2022