Vitamin ether ndiyo inonyanya kushandiswa kuwedzera muvhu rakaoma dhaka.Hydroxypropyl methyl cellulose ether inoita basa rinokosha muvhu rakaoma dhaka.Mushure mokunge cellulose ether mumatope yakanyungudutswa mumvura, glue inovimbiswa nekuda kwebasa repamusoro.Iyo coagulant zvinhu zvinogoneka uye zvakaenzana kugoverwa muhurongwa, uye hydroxypropyl methylcellulose ether, senge inodzivirira colloid, "inoputira" iyo yakasimba particles uye inoumba dhizaini remafuta ekuzora pamusoro pekunze kwayo, zvichiita kuti dhaka rigadzikane uye zvakare Kuvandudza fluidity yedhaka panguva yekusanganiswa uye kutsetseka kwekuvaka.
Nekuda kwechimiro chayo chemorekuru, iyo cellulose ether mhinduro inoita kuti mvura iri mudhaka isave nyore kurasikirwa, uye zvishoma nezvishoma inoiburitsa kwenguva yakareba, ichipa dhaka nekuchengetedza mvura kwakanaka uye kushanda.Kuchengetwa kwemvura yehydroxypropyl methyl cellulose ether: ndiyo inonyanya kukosha uye yakakosha chiratidzo.Kuchengetedzwa kwemvura zvinoreva huwandu hwemvura inogona kuchengetwa nedhaka ichangobva kusanganiswa mushure mekuita kwecapillary pachigadziko chinosveta.Aya anotevera ekuyedza matanho ekuchengeta mvura kweselulosi ether anopfupikiswa kuti akurukure.
Vacuum nzira
Panguva yekuedza, zadza faniro yeBuchner nedhaka yakasanganiswa nemvura, woiisa pabhodhoro rekusveta sefa, tanga vacuum pombi, uye ita kusefa kwemaminetsi makumi maviri pasi pekumanikidza kwakashata kwe (400±5) mm Hg.Zvadaro, maererano nehuwandu hwemvura mune slurry isati yasvika uye shure kwekutsvaira, verenga chiyero chekuchengetedza mvura sezvinotevera.
sefa pepa nzira
Kuchengetwa kwemvura kwe cellulose ether kunotongwa nekutorwa kwemvura kwepepa resefa.Iyo inoumbwa nesimbi ring test mold ine humwe hurefu, sefa bepa uye girazi rekutsigira ndiro.Pane zvikamu zvitanhatu zvepepa resefa pasi peyedzo mold, iyo yekutanga layer inokurumidza kusefa bepa, uye mamwe mashanu mapeji anononoka kusefa bepa.Shandisa chiyero chechokwadi kuti utange kuyera huremu hwepa pallet uye 5 zvidimbu zveanononoka sefa bepa, dururira dhaka muyedzo mold mushure mekusanganisa uye kuikwesha yakatsetseka, woiisa kwemaminitsi gumi nemashanu: wobva wayera huremu hwepallet uye iwo 5 akaturikidzana einononoka sefa yepepa uremu.
Nguva yekutumira: Kubvumbi-23-2023