HydroxyPropyl methyl celler HPMC, zvakare inozivikanwa seHydroxypromellose, iri chena kuti ishe-chena celloxse ine mvura inotonhora yekudziya uye insox HydroxyPropyl Group uye methyl Groups ndeye ethyl bond uye anymdrous glucose mhete yemasero yakasanganiswa, rudzi rweisiri-ionic cellulose yakasanganiswa ether. Icho chiSynthetic, isingashande, viscoelastic polymer inowanzoshandiswa seyakajairwa muOphthalmology, kana seyenzi kana kuti yakajeka mumishonga yemuromo.
1. Maitiro ekugadzira
Kraft purp ne αcellulose zvirimo zve97%, intrininsic viscosity ye720ml / g uye avhareji fiber kureba mu40% NAHOL Solution pa40】 kwemasekonzi makumi mashanu. Ipapo mupururu akaendeswa kubvisa yakawandisa 49% NAHOO SOOL yekuwana Alkali Cellulose. Right Ratio ye (49% NAHOOOH Solution Solution) ku (Chikamu chakasimba chePulp) mune yePlisuration Nhanho yaive mazana maviri. Iyo yehuremu ratio yeAlkali cellupe kusimba muAlkalose kune yakasimba muPulp ndeye 1.49. Iyo Alkali Cellalose yakaiswa muJacked Pressurance Stertor neKumanira Yemukati, yakacheneswa neNitrogen yekubvisa zvakakwana kubva kune imwe system. Zvadaro, tembiricha mune yekunetseka yaidzorwa pa60】 nepo kusimudzira kwemukati kwakaitwa.
Ipapo 2.4kg Dme akawedzerwa uye tembiricha mune yekunetseka yaidzorwa kusvika makumi matanhatu ℃. Mushure mekuwedzera kweDimethyl ether Mushure mekuwedzera chlomethane uye procylene oxide, tembiricha mune yekunetseka yakadzorwa kubva 80 ℃ kusvika 90 ℃. Mukuwedzera, kuita kwacho kwakatora kwemaminitsi makumi maviri na90 ℃.
Iyo gasi rinobva rabikwa kubva kune anogadzira uye akasviba hydroxypruproproproproproproproproproproproproproproll cellelose anobviswa kubva kune anowana. Tembiricha yehuswa hydroxyprupropropyl methyl cellelose yaive 62 ℃. Kuyera iyo inosvika 50% sizi saizi muhuremu hwehuremu hwehukuru hwakavakirwa pakugovaniswa kwehoney yehydroxproproproproproproproproproproproproproproproproproproproproproproproproproproproproproproproper
Semhedzisiro, iyo avhareji sizi yehukuru hweCalarse Scastles yaive 6.2mm. Iyo yakawanikwa isina kuchena hydroxypropyl methyl celler yakaunzwa kuenderera mberi kweBiaders (K3,2 Semhedzisiro yezviyero zvakafanana uchishandisa screens mashanu neakasiyana ekuvhura saizi, iyo avhareji yehukuru hwesimba yaive 1.4mm. Kuwedzera 80 ℃ Mvura inopisa kusvika kune yakagadziriswa isina kujairika hydroxypropropyl methyl methyl cellelose mune tangi ine tangi nekushisa kutonga kwejekete. Mari yehuremu hwehuremu hweiyo yakagadziriswa isina kujairika hydroxyprishlpropyl methyl cellowl cellows kusvika kune yakazara huwandu hweshure pane 0.1, uye slurry inowanikwa. Iyo slurry yakakurudzirwa pakudziya nguva dzose kwe80 × kwemaminetsi makumi matanhatu.
Zvadaro, iyo slurry inopiwa mukumhanya kwekutenderera kwe 0.5 rpm uye pre-isina kudengenyeka rotary dzvinyiriro (BHS SONTHFEN zvigadzirwa). Tembiricha yegrout ndeye 93 ℃. Shandisa pombi yekupa slurry, pombi yekudzvinyirira ndeye 0.2mpa. Saizi yakavhura yeiyo rotary dzvinyiriro inoshandiswa 80μm, uye nzvimbo yefaira ndeye 0.12m2. Iyo slurry inopihwa kune iyo rotary dzvinyiriro yekudzvinyirirwa inoshandurwa kuburikidza nefaira uye yakashandurwa kuita keke yefaira. The resulting filter cake is supplied with 0.3mpa steam and 95℃ hot water with a weight ratio of 10.0 to the solid component of the washed HYDROXYpropyl methyl cellulose, which is then filtered through a filter.
Mvura inopisa inopiwa kuburikidza nepombi pakudzvinyirirwa kweiyo 0.2mpa. Mushure memvura inopisa inopiwa, 0.3mpa steam inopiwa. Zvadaro, mushure mekushambidza zvigadzirwa zvinobviswa kubva mufirita pamusoro nepakati uye yakadzingwa mumushini wekuwachisa. Matanho kubva pakupa slurry yekudzingwa zvigadzirwa zvakashambidzwa zvinoitwa zvichiramba zvichiramba. Sezvo kuyerwa uchishandisa kupisa - kuomesa hygrometer, iyo mvura yemvura yeiyo yakashambidzwa ichigadzirwa yakadzingwa yaive 52.8%. Zvigadzirwa zvakashambidzwa zvinodzimwa kubva kuFirita Dhizaina akaomeswa neyemhepo yakaoma pa80
2.application
HPMC chigadzirwa chinoshandiswa seanotsigira, kuparadzira, binder, emulsifieri uye stabilizer muindasitiri yemiindasitiri. Zvakare inoshandiswa zvakanyanya mumubhadharo wechiSynthetic, peturu, ceramic, pepa, ganda, mushonga, chikafu, zvidhori uye mamwe maindasitiri.
Kutumira Nguva: Mar-23-2022