Parizvino, mhando yemumba hydroxypropyl methylcellulose inosiyana zvakanyanya, uye mutengo unosiyana zvakanyanya, zvichiita kuti zviomere vatengi kuita sarudzo chaiyo. Iyo yakagadziridzwa HPMC yeimwe kambani yekune dzimwe nyika mhedzisiro yemakore mazhinji ekutsvaga. Kuwedzerwa kwezvinhu zvekutsvaga kunogona kuvandudza mashandiro ekuvaka uye kugadzirisa kushanda. Ehe, zvinokanganisa zvimwe zvivakwa, asi kazhinji kutaura zvinoshanda; Chinangwa chega chekuwedzera zvimwe zvinongedzo ndechekuderedza mari, zvichikonzera kuderedzwa kwakanyanya kwekuchengetedza mvura, kubatana uye zvimwe zvinhu zvechigadzirwa, zvichikonzera matambudziko mazhinji emhando yekuvaka.
Pane misiyano inotevera pakati peHPMC yakachena uye yakasvibiswa HPMC:
1. Yakachena HPMC inooneka fluffy uye ine yakaderera yakawanda density, kubva 0.3-0.4g/ml; yakasvibiswa HPMC ine fluidity iri nani uye inonzwa inorema, izvo zviri pachena zvakasiyana kubva kune chaiyo chigadzirwa muchitarisiko.
2. Pure HPMC aqueous solution iri pachena, high light transmittance, uye water retention rate ≥ 97%; yakasvibiswa HPMC aqueous solution ine makore, uye mwero wekuchengetedza mvura unonetsa kusvika 80%.
3. Yakachena HPMC haifaniri kunhuwa ammonia, starch uye doro; yakasvibiswa HPMC inogona kazhinji kunhuhwirira marudzi ese ekunhuhwirira, kunyangwe isina kunaka, inonzwa ichirema.
4. Pure HPMC powder is fibrous under microscope kana magnifying glass; yakasvibiswa HPMC inogona kucherechedzwa se granular solids kana makristasi pasi pemaikorosikopu kana girazi rinokudza.
Urefu husingakundiki hwe200,000?
Nyanzvi zhinji dzepamba nenyanzvi dzakaburitsa mapepa anotenda kuti kugadzirwa kweHPMC kunorambidzwa nekuchengetedzwa kwemidziyo yemumba uye kuiswa chisimbiso, slurry process uye yakaderera-kudzvanywa kugadzirwa, uye mabhizinesi akajairwa haagone kugadzira zvigadzirwa zvine viscosity inopfuura mazana maviri ezviuru. Muzhizha, hazvibviri kugadzira zvigadzirwa zvine viscosity inopfuura 80,000. Vanotenda kuti izvo zvinonzi 200,000 zvigadzirwa zvinofanirwa kunge zviri zvigadzirwa zvemanyepo.
Nharo dzenyanzvi hadzisi dzisina musoro. Zvinoenderana neyakapfuura kugadzirwa kwemukati mamiriro, izvo zviri pamusoro zvinogona kutorwa.
Kiyi yekuwedzera viscosity yeHPMC kuvharika kwepamusoro kweiyo reactor uye yakakwirira-kudzvanywa kuita pamwe nemhando yepamusoro-yemhando zvinhu. Iyo yakakwirira yemhepo inodzivirira kuparara kwe cellulose neokisijeni, uye iyo yepamusoro-yepamusoro-soro inosimudzira kupindira kweiyo etherification agent mu cellulose uye inovimbisa kufanana kwechigadzirwa.
Iyo yakakosha index ye200000cps hydroxypropyl methylcellulose:
2% aqueous solution viscosity 200000cps
Kuchena kwechigadzirwa ≥98%
Methoxy content 19-24%
Hydroxypropoxy content: 4-12%
200000cps hydroxypropyl methylcellulose maficha:
1. Yakanakisa kuchengetedza mvura uye thickening zvivakwa kuti ive nechokwadi yakakwana hydration ye slurry.
2. High bonding simba uye inokosha air-entraining effect, zvinobudirira inhibit shrinkage uye kuputika.
3. Kunonoka kusunungurwa kwekupisa kwe simenti hydration, kunonoka nguva yekuisa, uye kutonga nguva inoshandiswa yesamende dhaka.
4. Kuvandudza kuwirirana kwemvura yepombi yepombi, kunatsiridza rheology, uye kudzivirira kuparadzaniswa uye kubuda ropa.
5. Zvigadzirwa zvakakosha, zvinonangana neakakwira tembiricha yekuvaka nharaunda muzhizha, kuve nechokwadi chekuita hydration ye slurry pasina delamination.
Nekuda kwekurembedza kwekutarisa kwemusika, kukwikwidza muindasitiri yematope kuri kuramba kuchiwedzera. Kuti vawane kumusika, vamwe vatengesi vakasanganisa zvinhu zvakawanda zvisingadhuri kuti vagadzire cellulose ether yakachipa. Pano, mupepeti anosungirwa kuyeuchidza vatengi kuti varege kutevera neupofu mitengo yakaderera, kuti vasanyengerwa Kunyengerwa, kutungamirira kunjodzi dzeinjiniya, uye pakupedzisira kurasikirwa kunodarika zvakawanikwa.
Nzira dzakajairwa dzehupombwe uye nzira dzekuzivikanwa:
(1) Kuwedzerwa kweamide kune cellulose ether kunogona kukurumidza kuwedzera viscosity yemushonga we cellulose ether, zvichiita kuti zvisakwanise kuizivisa ne viscometer.
Nzira yekuziva: Nekuda kwehunhu hweamides, rudzi urwu rweselulosi ether mhinduro kazhinji ine tambo chiitiko, asi yakanaka cellulose ether haizoratidzike tambo chiitiko mushure mekupera, mhinduro yacho yakafanana nejelly, inonzi inonamira asi isina kubatana.
(2) Wedzera starch kune cellulose ether. Starch kazhinji hainyungudike mumvura, uye mushonga wacho kazhinji hauna kufambiswa zvakanaka kwechiedza.
Nzira yekuziva: Drop cellulose ether solution ine iodine, kana ruvara ruchishanduka bhuruu, zvinogona kunzi starch yakawedzerwa.
(3) Wedzera polyvinyl doro poda. Sezvatinoziva tose, mutengo wemusika wepolyvinyl doro poda yakadai se2488 uye 1788 kazhinji yakaderera pane iyo cellulose ether, uye kusanganisa polyvinyl doro poda inogona kuderedza mari ye cellulose ether.
Chiziviso nzira: Rudzi urwu rweselulosi ether kazhinji ine granular uye gobvu. Inonyungudika nekukurumidza nemvura, tora mhinduro netsvimbo yegirazi, pachava nechinhu chakajeka chetambo chiitiko.
Pfupiso: Nekuda kwechimiro chayo chakakosha uye mapoka, kuchengetwa kwemvura kwe cellulose ether hakugone kutsiviwa nezvimwe zvinhu. Hazvina mhosva kuti rudzi rwekuzadza rwakasanganiswa sei, chero bedzi ichisanganiswa muhuwandu hwakawanda, kuchengetwa kwayo kwemvura kuchaderedzwa zvikuru. Huwandu hweHPMC ine yakajairwa viscosity ye10W mune yakajairika dhaka ndeye 0.15 ~ 0.2 ‰, uye chiyero chekuchengetedza mvura i> 88%. Kubuda ropa kwakanyanya. Nokudaro, chiyero chekuchengetedza mvura chiratidzo chakakosha chekuyera kunaka kweHPMC, kana yakanaka kana yakaipa, chero bedzi iyo yakawedzerwa kune dhaka, ichava yakajeka pakatarisa.
Nguva yekutumira: May-10-2023