Sida loo doorto hydroxypropyl methylcellulose ku habboon ee gidaarka gudaha iyo dibaddaba

Sida loo doorto HPMC saxda ah

1. Marka loo eego qaabka: Marka loo eego qaababka kala duwan ee noocyada kala duwan ee dhejiska, moodooyinka viscosity ee hydroxypropyl methylcellulose iyo methylcellulose sidoo kale way kala duwan yihiin. Waxaa loo isticmaalaa 40,000 ilaa 100,000. Isla mar ahaantaana, fiber ether-ka khudradda ma beddeli karo doorka xirayaasha kale, ku darida ether cellulose macnaheedu maaha in maaddooyinka kale ee xirmooyinka kale la dhimi karo.

2. Ma u baahan tahay biyo qabow ether cellulose kala firdhisan: Cellulose ether (ay ku jiraan hydroxypropyl methylcellulose iyo methylcellulose) waa surfactant ah oo leh viscosity sare ka dib kala diri. Waa sababta dabiiciga ah in haddii ether cellulose caadiga ah lagu daro biyaha, way fududahay in la sameeyo kubbadda, bannaanka kubbadda ayaa lagu milmay xal aad u qaro weyn, gudahana waa la duubay, wayna adagtahay. si ay biyuhu u dhex galaan, taas oo keentay kala dirid xumo. . Qalabka dusha lagu daaweeyay ee cellulose (kaas oo dib u dhigi kara kala dirid) ma noqon doono sidan oo kale, waxaana si fiican loogu kala firdhi karaa biyo qabow (dillaac dib u dhac ah, oo si tartiib tartiib ah u milma ka dib kala firdhinta). Waa doorasho wanaagsan in la fahmo kala duwanaanshaha kor ku xusan.

1. Qalalan qallalan oo isku dhafan gudaha gudaha iyo dibedda dibedda, sababtoo ah ether-ka cellulose ayaa si fiican u kala firdhiyey walxaha inta lagu jiro habka qalalan ee qallajinta, ma jiri doonto wax gardarro ah. Sidaa darteed, waxaa lagu talinayaa in la isticmaalo nooca caadiga ah (nooca kala firdhinta biyaha aan qabow ahayn), sababtoo ah heerka kala dirida nooca caadiga ah ayaa ka dhakhso badan kan nooca firidhsan biyaha qabow, kaas oo soo gaabinaya wakhtiga sugitaanka laga bilaabo isku-dhafka slurry ilaa dhismaha.

2. Diyaarinta putty oo si toos ah u milmaan ether cellulose (oo ay ku jiraan hydroxypropyl methylcellulose iyo methylcellulose) biyaha oo ku qaso walxaha kale, waxaa lagu talinayaa in la isticmaalo nooca kala firdhinta biyaha qabow ether cellulose. Eter-ka cellulose-ka dusha lagu daaweeyay si fiican ayaa loogu kala firdhi karaa biyo qabow oo waa la milmi karaa (waxay dib u dhigi kartaa kala dirida)