Matanho ekugadzira uye minda yekushandiswa kweHPMC

1. Nhanganyaya yeHydroxypropyl Methylcellulose (HPMC)

Hydroxypropyl Methylcellulose (HPMC)i-non-ionic cellulose ether inogadzirwa neshinda yedonje yechisikigo kana pulp yehuni kuburikidza nekuchinja kwemakemikari. HPMC ine mvura inonyunguduka zvakanaka, inokora, inogara kwenguva refu, inoita firimu zvakanaka uye inoenderana nezvinhu zvipenyu, saka inoshandiswa zvakanyanya mukuvaka, mishonga, chikafu, makemikari ezuva nezuva nedzimwe nzvimbo.

2. Matanho ekugadzira HPMC

Kugadzirwa kweHPMC kunosanganisira matanho makuru anotevera:

Kugadzirira zvinhu zvisina kugadzirwa

Chinhu chikuru cheHPMC icellulose yechisikigo yakachena kwazvo (inowanzo shandiswa nedonje kana huni), iyo inoda kurapwa kwekutanga kubvisa tsvina uye kuve nechokwadi chekuchena uye kufanana kwecellulose.

Kurapa kweAlkalinization

Isa cellulose mu reactor wobva wawedzera huwandu hwakakodzera hwe sodium hydroxide (NaOH) solution kuti iwedzere cellulose munzvimbo ine alkaline kuti igadzire alkali cellulose. Maitiro aya anogona kuwedzera mashandiro e cellulose uye kugadzirira etherification reactions dzinotevera.

Kuita kweEtherification

Zvichibva pa alkali cellulose, mishonga ye methylating (yakadai se methyl chloride) uye mishonga ye hydroxypropylating (yakadai se propylene oxide) inounzwa kuti iite etherification reaction. Mhinduro yacho inowanzoitwa mu closed high-pressure reactor. Pakupisa nekumanikidzwa kwakati, mapoka e hydroxyl ari pa cellulose anotsiviwa ne methyl uye hydroxypropyl groups kuti vagadzire hydroxypropyl methylcellulose.

Kushambidza kusina kusimba

Mushure mekugadziriswa, chigadzirwa chacho chinogona kunge chine zvinhu zvisina kugadziriswa zvemakemikari uye zvimwe zvinhu, saka zvakakosha kuwedzera acid solution yekurapa neutralization, wozogeza nemvura yakawanda kana organic solvent kubvisa zvinhu zvakasara zvealkaline netsvina.

Kushaya mvura mumuviri uye kuoma

Mushonga weHPMC wakagezwa unoiswa mu centrifuge kana kusefa kuti ubvise mvura yakawandisa, uye tekinoroji yekuomesa inoshandiswa kugadzira hupfu hwakaoma kana maflakes kuchengetedza hunhu hweHPMC.

Kukuya nekuongorora

HPMC yakaomeswa inotumirwa kumichina yekukuya kuti ipwanywe kuti pawanikwe upfu hweHPMC hwezvimedu zvakasiyana. Mushure mezvo, kuongorora nekuyera kunoitwa kuti ive nechokwadi chekuti chigadzirwa chacho chakafanana kuti chienderane nezvinodiwa zvakasiyana zvekushandisa.

Kurongedza nekuchengetedza

Mushure mekuongororwa kwemhando, chigadzirwa chekupedzisira chinoiswa mumapaketi zvichienderana nemashandisirwo akasiyana (senge 25kg/bhegi) uye chinochengetwa munzvimbo yakaoma uye ine mhepo inofefetera kudzivirira hunyoro kana kusvibiswa.

3. Nzvimbo huru dzekushandisa dzeHPMC

Nekuda kwehunhu hwayo hwekukora, kugadzira firimu, kuchengetedza mvura, emulsifying uye biocompatibility, HPMC yave ichishandiswa zvakanyanya mumaindasitiri akawanda:

Indasitiri yekuvaka

HPMC chinhu chakakosha chekuwedzera pakuvaka, chinoshandiswa zvakanyanya pa:

Dura resimende: rinovandudza kuyerera kwechivako, rinovandudza kunamira, uye rinodzivirira kurasikirwa nemvura zvakanyanya.

Kunamira mataira: kunowedzera kuchengetedza mvura kwenamira mataira uye kuvandudza mashandiro ekuvaka.

Zvigadzirwa zveGypsum: zvinovandudza kuramba kutsemuka uye kushanda zvakanaka kwekuvaka.

Upfu hweputty: hunovandudza kunamira, kuramba kutsemuka uye kugona kudzivirira kudonha.

Pasi rinozvienzanisa: rinovandudza kuyerera, kuramba kupfeka uye kugadzikana.

Indasitiri yemishonga

HPMC inoshandiswa zvakanyanya mumunda wemishonga se:

Chinofukidza uye chinogadzira firimu pamapiritsi emushonga: chinovandudza kugadzikana kwemushonga uye kudzora mwero wekuburitswa kwemushonga.

Mishonga inoburitswa kwenguva refu uye inodzorwa: inoshandiswa mumapiritsi anoburitswa kwenguva refu uye mumakapisi anoburitswa kwenguva refu kuti igadzirise kuburitswa kwemushonga.

Zvinotsiva kapisiyumu: zvinoshandiswa mukugadzira makapisiyumu emuriwo (makapisiyumu emuriwo).

4. Indasitiri yezvekudya

HPMC inoshandiswa sechinhu chinowedzera chikafu kunyanya pa:

Chinokora uye chinosanganisa: chinoshandiswa muzvinhu zvakabikwa, jellies, sauces, nezvimwewo kuti chikafu chiwedzere kunaka.

Chinosimbisa: chinoshandiswa mu ice cream nezvigadzirwa zvemukaka kudzivirira kunaya kwemapuroteni.

Chikafu chemuriwo: chinoshandiswa sechinhu chinosimbisa chikafu chinobva mumiti kuti chitsive zvinhu zvinosimbisa muviri zvinobva mumhuka zvakaita segelatin.

Indasitiri yemakemikari yezuva nezuva

HPMC chinhu chakakosha muzvigadzirwa zvekuzora uye zvekuchengetedza muviri:

Zvishandiso zvekuchengetedza ganda: zvinoshandiswa mumafuta anonhuhwirira, mamasiki ekumeso, nezvimwewo kuti zvipe hunyoro uye kugadzikana.

Shampoo ne gel yekugeza: zvinowedzera kugadzikana kwefuro uye kuwedzera kunaka kweganda.

Mushonga wemazino: unoshandiswa semushonga unosimbisa uye unonyorovesa kuti unakirwe nekuravira.

Pendi neinki

HPMC ine hunhu hwakanaka hwekugadzira firimu uye kugadzikana kwemuchina wekumisa uye inogona kushandiswa kune:

Pendi yeLatex: inovandudza kukwesha kwependi uye rheology yayo uye inodzivirira kunaya kwemvura.

Inki: Kuvandudza rheology uye kuvandudza kunaka kwekudhinda.

Mamwe maapplication

HPMC inogona kushandiswawo kune:

Indasitiri yeCeramic: Sechinhu chinosunga, wedzera simba remaburi eCeramic.

Kurima: Kunoshandiswa mumishonga inouraya zvipembenene uye mukuisa mbeu kuti mishonga igare yakasimba.

Indasitiri yekugadzira mapepa: Semushonga wekuisa saizi, wedzerai kudzivirira mvura uye kudhindwa kwemapepa.

HPMCchinhu chinoshandiswa zvakanyanya sepolymer, chinoshandiswa zvakanyanya mukuvaka, mishonga, chikafu, makemikari ezuva nezuva, machira uye mamwe maindasitiri. Maitiro ayo ekugadzira anosanganisira kurapa zvinhu zvisina kugadzirwa, alkalizing, etherification, kusuka, kuomesa, kukuya nezvimwe nhanho, kubatana kwega kwega kunokanganisa mhando yechigadzirwa chekupedzisira. Nekuvandudzwa kwezvinodiwa zvekuchengetedza zvakatipoteredza uye kukura kwekudiwa kwemusika, tekinoroji yekugadzira yeHPMC iri kugadziriswawo kuti isangane nezvinodiwa nemaindasitiri akawanda.