I-Hydroxypropyl Methyl Selelose HPMC, ekwabizwa ngokuba yi-hydroxypromellose, i-White-White ukuya kwi-Ether-Sheet Ether i-Eest Powder Order Order okanye igrayithi ye-ithroule eshushu efana ne-methyl sellyulose. I-Hydroxypropy yeQela kunye neQela le-Methyl yi-Ether Bond kunye ne-AnhyDrauration Iringi ye-Gluolose ye-SellUlose edityanisiweyo, luhlobo lwe-ionic sell sether ixutywe ngayo. Yinto engu-semi-yokwenziwa, engasebenziyo, i-viclaelastie isetyenziswa njengeoyile kwi-Opthalmology, okanye njengowona nyhafisi okanye oqinisekileyo kumayeza omlomo.
1. Inkqubo yemveliso
I-Kraft Pulp kunye ne-αcellulose yomxholo wama-97%, i-vissinic ye-720ml / g kunye ne-avareji yobude be-fiber ye-2.6mm ifakwe kwi-49% ye-naod kwi-40 ℃ imizuzwana engama-40. Emva koko ipulpu yaphelelwa ukuba isuse i-49% ye-nao ye-nao ye-nao wscouli ukufumana ialkali sellulose. Umyinge wobunzima be (49% ye-nahh enesisombululo) ukuya (icandelo eliqinileyo le-pulp) kwinyathelo lokungena. I-alkali selsulose ifunyenwe (i-20kg) ifakwe kwi-reactor yoxinzelelo ehlaselweyo, emva koko icinyiwe kwaye ihlanjululwe nge-nitrogen ukuze isuse ioksijini evela kwi-oxygen evela kwi-oxygen evela kwi-oxygen evela kwi-oxygen evela kwi-oxygen evela kwi-oxygen evela kwi-oxygen evela kwi-oxygen evela kwi-oxygen evela kwi -oky. Emva koko, ubushushu kwi-reactor balawulwa nge-60 ℃ ngelixa i-tirring yangaphakathi yenziwa.
Emva koko i-2.4kg DMM yongezwa kwaye iqondo lobushushu kwi-rector lalawulwa kuma-60 ℃. Emva kokongezwa kwe-DIMETHYL ETER, i-methylene chloride yongezwa ukwenza umyinge we-molar we-methylene ye-propylene oxide ye-Alkaline Oxide ye-Alkaline Oxide ye-Proplene ye-Alkaline I-Subylene i-supple ye-Alkali ilawulwa ukusuka kwi-60 ℃ ukuya kwi-80 ℃. Emva kokongeza i-chloromethane kunye ne-propylene oxide, iqondo lobushushu kwi-rector lalawulwa ukusuka kwi-80 ℃ ukuya kwi-90 ℃. Ukongeza, impendulo eyamkelweyo kangangemizuzu engama-20 kwi-90 ℃.
Irhasi ke ikhutshiwe kwi-rector kunye ne-HydroxyPyl ye-Hydropyl Methyl Selelose isuswe kwi-Reactor. Iqondo lobushushu le-chydroxypropyl methyl sellise yayingu-62 ℃. Ukulinganisa ubungakanani be-50% ye-paulaticle kubungakanani be-sumulative bubukhulu bokusasazeka ngokusekwe kumyinge we-chydropyl ye-chadylyl metyl selcelose kwizinto ezintlanu zokuhlala, nganye inesayizi eyahlukileyo yokuvula.
Ngenxa yoko, ubungakanani obuqhelekileyo bamasuntswana abathi bangama-6.2mm. I-chadroxdyl ye-Hydropyl ye-methyl selselose yaziswa kwi-biaxial ye-biixial (krc igon S1, l / d, isantya se-150rpm) kwisantya se-mptropyl sellyl sellyulose yafunyanwa. Ngenxa yemilinganiselo efanayo besebenzisa izikrini ezi-5 ezinobukhulu ovulekileyo, ubungakanani be-tatricle i-1.4mm. Ukongeza ama-80 ℃ amanzi ashushu kwi-Hydroxypropyl Methyl Selelose kwitanki ngolawulo lobushushu lwejakethi. the amount of the weight ratio of the decomposed crude hydroxypropyl methyl cellulose to the total amount of the slurry is 0.1, and the slurry is obtained. I-slirry yafudolwa kwiqondo lokushisa elingapheliyo le-80 ℃ kwimizuzu engama-60.
Emva koko, i-slickry inikezelwa kwisantya esijikelezayo se-0.5 ye-RPM kunye ne-filter yoxinzelelo lwangaphambili (Bhs Sonthofen). Iqondo lobushushu leGrout yi-93 ℃. Sebenzisa impompo ukubonelela nge-slirry, i-pump yokukhupha uxinzelelo yi-0.2mpa. Ubungakanani bokuvula kwecebo loxinzelelo lokujikeleza li-80μ, kwaye indawo yokuhluza yi-0.12m2. Isilayidi esinikezelwe kwi-filter yoxinzelelo ejikelezayo siyacocwa ngecebo lokucoca ulwelo kwaye iguqulwe ibe yikhekhe yokucoca. Ikhekhe yokucoca isiphumo inikezelwa nge-0.3MPA Steam kunye ne-95 ℃ Amanzi ashushu anomyinge we-10.0 ukuya kwicandelo eliqinileyo le-DHDROXYLY METHYL I-FOLLULOse, emva koko ihlulwe ngefiltha.
Amanzi ashushu anikezelwa ngempompo kuxinzelelo lwe-0.2mpa. Emva kokuba amanzi ashushu anikezelwa, i-0.3MPA Steam inikezelwa. Emva koko, emva kokuba iimveliso zokuhlamba zisuswe kwindawo yokuhluza ngumgangatho wokucoca kwaye ukhuphe umatshini wokuhlamba. Amanyathelo avela ekuboneleleni nge-slirry ukuhambisa iimveliso ezihlanjwe zenziwa ngokuqhubekayo. Njengokulinganisa ukusebenzisa ubushushu - i-hygrometer eyomisayo, umxholo wamanzi wemveliso ehlambe wothukile ngenxa ye-52.8%. Iimveliso ezihlanjwe zikhutshiwe kwi-filter yoxinzelelo yoxinzelelo zomiswe yi-Air Rider of Air Multopyl Gulloplose.
2.Ai-pication
Imveliso ye-HPMC isetyenziswa njenge-tickener, ukusasazeka, i-binder, i-emulsifier kunye nokuzinzisa kwishishini lendwangu. Kukwasetyenziswa ngokubanzi kwi-resin ye-resin, i-petrochemical, i-ceramic, iphepha, isikhumba, iyeza, ukutya, amayeza kunye namanye amashishini.
Ixesha lasemva kwexesha: Mar-23 ukuya ku-2422