Hydroxypropyl Methylcellulose sida wakiilada kala soocida, alaabooyinka la helay waxay leeyihiin qaybo habaysan oo dabacsan, cufnaanta muuqata ee ku habboon iyo waxqabadka habaysan. Si kastaba ha ahaatee, isticmaalka Hydroxypropyl Methylcellulose kaligiis ayaa gacan ka geysan kara is-beddel wanaagsan ee xabagta. Waxqabadka guud ee xabagta ayaa liidata. Isticmaalka isku dhafka ah ee hydroxypropyl methylcellulose iyo dhowr heerar kala duwan oo alkolysis ah oo khamriga polyvinyl ah ayaa ka dhigi kara waxqabadka alaabada mid ka sii fiican, tayada fudud ee xakamaynta isla mar ahaantaana waxay yareyn kartaa kharashka. Wakiilka kala firdhiya ayaa ah qodobka ugu muhiimsan ee saameeya qaabka qurubka xabagta chloride polyvinyl. Inta yar ee xiisadda dusha sare ee xalka aqueous ee wakiilada kala firdhiya guud iyo xiisada dhexda ee Vinyl chloride monomer ayaa ah, dhibcaha ugu fiican ee VCM waa la kala firdhi karaa. Oo sidaas daraaddeed dhexroorka qayb ee resin PVC noqon doonaa mid yar. Awoodda ilaalinta ee wakiilka kala firdhiya ayaa sii xoogaysanaysa, mar kasta oo ay soo dhawaadaan qaybaha xabagta PVC ee la helay ayaa ahaan doona oo ay yaraantu noqon doonto. Iyo isku-dhafka intergranular sidoo kale waa ka sii adag yahay, markaa way fududahay in la sameeyo resins.
Tusaale ahaan, nidaamka kala firdhinta xarunta ee PVA iyo HPC, heerka sare ee alkolysis ee PVA waa, weynaanta xiisadda dusha sare ee xalka aqueous ayaa noqon doona iyo awoodda ilaalinta ayaa sii xoogaysan doonta, halka qayb gaar ah oo ah hydroxypropyl methylcellulose uu leeyahay. saamayn fidinta wanaagsan. Sidaa darteed, adoo isticmaalaya PVA oo leh shahaadada alkolysis sare ee aasaasiga ah
wakiilka kala firdhiya, iyo isku-darka a
qadar gaar ah oo ah hydroxypropyl methylcellulose
Sida wakiilka kala firdhiyey ee polymerization hakinta, way fududahay in la diyaariyo xabagta PVC kaas oo buuxin kara shuruudaha qaab-dhismeedka qayb. Tusaale ahaan, nidaamka kala firdhinta xarunta ee PVA iyo HPC, heerka sare ee alkolysis ee PVA waa, weynaanta xiisadda dusha sare ee xalka aqueous ayaa noqon doona iyo awoodda ilaalinta ayaa sii xoogaysan doonta, halka qayb gaar ah oo ah hydroxypropyl methylcellulose uu leeyahay. saamayn fidinta wanaagsan.
Waqtiga boostada: Mar-17-2022