Hypromellose ma beddeli karaa hydroxyethyl cellulose rinjiga dhagax dhabta ah

Alaabooyinka cellulose waxaa laga soo qaatay saxarka suufka dabiiciga ah ama saxarka alwaax iyadoo la etherification. Alaabooyinka cellulose ee kala duwan waxay isticmaalaan walxo kala duwan oo etherifying. Hypromellose HPMC waxay isticmaashaa noocyo kale oo ah maaddooyinka etherifying (chloroform iyo 1,2-epoxypropane), halka hydroxyethyl cellulose HEC ay isticmaasho Oxirane etherifying agents. Hydroxyethyl cellulose waxaa loo isticmaali karaa dhumuc ahaan rinjiga dhagaxa dhabta ah iyo rinjiga cinjirka. Sababtoo ah qadarka weyn ee isku-darka, cufnaanta gaarka ah, roobabka, waxay u baahan tahay inay ku darto wakiilka dhumucdiisuna waxay kordhisaa viscosity, si loo daboolo baahida dhismaha buufinta buufinta, iyo hagaajinta xasilloonida kaydinta, iyo si loo gaaro xoog gaar ah. Si loo gaaro xoog wanaagsan, caabbinta biyaha wanaagsan iyo caabbinta cimilada, xulashada alaabta ceeriin iyo naqshadeynta qaabeynta ayaa aad muhiim u ah.

Guud ahaan, qadarka tayada sare leh emulsion rinji dhagax dhab ah ayaa noqon doona mid sare. Tusaale ahaan, tan rinjiga dhagaxa dhabta ah waxaa ku jiri kara 300 kg oo ah emulsion acrylic saafi ah iyo 650 kg oo ciid dhagax ah oo midab dabiici ah. Marka maadada adag ee emulsion ay tahay 50%, mugga emulsion 300 kg ka dib qalajinta waa qiyaastii 150 litir, 650 Kg oo ciid ah waa qiyaastii 228 litir. Taasi waa in la yiraahdo, wakhtigan PVC-ga (fiirsashada mugga midabka) ee rinjiga dhagaxa dhabta ah waa 60% , sababtoo ah qaybaha ciidda midabka leh waa kuwo waaweyn oo aan caadi ahayn qaab ahaan, iyada oo la raacayo shuruudaha qaybinta qaybinta qayb gaar ah, ka dib qalajinta. Rinjiga dhagaxa dhabta ah wuxuu ku jiri karaa CPVC (fiirsashada mugga midabka muhiimka ah) oo ku saabsan. Dhumucdiisuna, haddii viscosity saxda ah ee cellulose la doorto, filim xad dhamaystiran oo cufan ayaa la samayn karaa si loo buuxiyo saddexda shuruudood ee waxqabadka ugu weyn ee rinjiga dhagaxa dhabta ah. Haddii content ee emulsion hooseeyo, waxaa lagu talinayaa in la isticmaalo viscosity sare ee cellulose sida dhumucdiisuna (tusaale 100,000 viscosity) , gaar ahaan ka dib markii qiimaha cellulose kordho, taas oo hoos u dhigi kartaa qadarka cellulose loo isticmaalo, sidoo kale u ogolaan kartaa waxqabadka. oo ka mid ah rinjiga dhagaxa dhabta ah oo ka sarreeya. Qaar ka mid ah soosaarayaasha rinji dhagaxa dhabta ah ee qiimaha jaban ayaa bedelay hydroxyethyl cellulose leh hypromellose sababtoo ah kharashka iyo tixgelino kale. Marka la barbar dhigo labada nooc ee cellulose, hydroxyethyl cellulose waxay leedahay awood biyo-hayneed oo ka fiican, ma lumin awoodda biyo-haynta sababtoo ah jel heerkul sarreeya, waxayna leedahay caabbinta caarada qaarkood. Waxqabadka darted, waxaa lagu talinayaa in la isticmaalo 100,000 viscosity hydroxyethyl cellulose sida dhumuc weyn ee rinjiga dhagaxa dhabta ah.