Sechivako chinoshandiswa zvakanyanya muindasitiri yekuvaka, dhaka rinotamba zvakakosha zvimiro uye zvinoshanda mabasa. Iyo fluidity yedhaka chimwe chezviratidzo zvakakosha zvinokanganisa kuita kwayo kuvaka. Kuyerera kwakanaka kunobatsira kune nyore kwemabasa ekuvaka uye kunaka kwechivako. Kuti uvandudze fluidity uye kushanda kwedhaka, zvakasiyana-siyana zvinowedzera zvinowanzoshandiswa kugadzirisa. Pakati pavo,hydroxypropyl methylcellulose (HPMC), sechinowanzo shandiswa mvura-soluble polymer compound, inoita basa rinokosha mudhaka. .
Hunhu hwakakosha hweHPMC: HPMC imvura-inonyungudika yepolymer zvinhu zvakagadzirwa kubva kumakemikari akagadziridzwa selulosi chaiwo. Iyo ine yakanakisa thickening, gelling, kuchengetedza mvura uye zvimwe zvivakwa. Haina kunyungudika mumvura, asi inogona kuumba mhinduro ye viscous mumvura, saka inowanzoshandiswa pakuvaka, kuvhara, mishonga uye mamwe minda. Kana ichishandiswa sechinhu chinowedzera dhaka, HPMC inogona kunyatso kuvandudza fluidity, kuchengetwa kwemvura uye kushanda kwedhaka.
Iyo pesvedzero meshini yeHPMC pane dhaka fluidity:
Kukora mhedzisiro: HPMC pachayo ine yakakosha kukora mhedzisiro. Kana yakawedzerwa kune dhaka, inogona kuwedzera zvakanyanya viscosity yedhaka. Iko kukora mhedzisiro inokonzerwa neHPMC mamorekuru anoumba network network mumvura, iyo inotora mvura uye inowedzera, ichiwedzera viscosity yechikamu chemvura. Iyi nzira inobvumira fluidity yedhaka kuti igadziriswe. Kana iyo HPMC yemukati mudhaka yakakwira, kuyerera kwemahara kwemvura kunozoganhurwa kune imwe nhanho, saka iyo yakazara fluidity yedhaka inoratidza dzimwe shanduko.
Kuvandudza kuchengetwa kwemvura: HPMC inogona kugadzira firimu rakatetepa mudhaka kuderedza kubuda kwemvura uye kuvandudza kuchengetwa kwemvura kwedhaka. Doka rine kuchengetedzwa kwemvura zvirinani rinogona kuchengetedza kushanda kwenguva yakareba, izvo zvakakosha kuti zvive nyore kuvaka panguva yekuvaka. Kuchengetedzwa kwemvura kwakakwirira kunogona kudzivirira dhaka kubva pakuoma nguva isati yakwana uye kuvandudza nguva yekuvaka uye kushanda zvakanaka kwedhaka.
Kupararira: HPMC inogona kugadzira colloidal mhinduro mumvura, iyo inogona kuvandudza kupararira pakati pevhu zvinoumba. Iyo fluidity yedhaka haina hukama chete nechikamu chesimende, jecha uye admixtures, asi zvakare yakabatana zvakanyanya nekupararira kwezvikamu izvi. Nekugadzirisa huwandu hweHPMC, zvikamu zviri mudhaka zvinogona kuparadzirwa zvakaenzana, nokudaro zvichiwedzera kuvandudza fluidity.
Gelling mhedzisiro: HPMC inogona kusimudzira kupararira kwakanyanya kwezvikamu mudhaka uye kugadzirisa kugadzikana kwechimiro chayo. Nekuvandudza gelling mhedzisiro, HPMC inogona kuchengetedza yakagadzikana fluidity yedhaka panguva yekuchengetedza kwenguva refu uye kudzivirira kudzikira kwemvura nekuda kwekunonoka kwenguva.
Plastiki yekusimudzira maitiro: Kuwedzerwa kweHPMC kunogona zvakare kusimudzira mapurasitiki edhaka, zvichiita kuti zvive nyore kushanda uye kuve nepurasitiki iri nani panguva yekuvaka. Semuenzaniso, pakupura madziro, fluidity yakakodzera uye plastiki inogona kuderedza kuitika kwekutsemuka uye kuvandudza kunaka kwekupurasita.
Yakagadziridzwa kushandiswa kweHPMC mumatope fluidity kugadzirisa:
Dosage control: Iyo dosage yeHPMC inokanganisa zvakananga kuyerera kwedhaka. Kazhinji kutaura, kana huwandu hwekuwedzera hweHPMC huri pakati nepakati, iyo fluidity uye kuchengetwa kwemvura kwedhaka kunogona kuvandudzwa zvakanyanya. Nekudaro, yakawandisa HPMC inogona kuita kuti viscosity yedhaka iwedzere zvakanyanya, izvo zvinozoderedza fluidity yayo. Naizvozvo, huwandu hweHPMC hwakawedzerwa hunoda kunyatsodzorwa zvinoenderana nezvinodiwa chaizvo mumashandisirwo.
Synergy nemamwe admixtures: Kuwedzera kune HPMC, mamwe admixtures anowanzowedzerwa kune dhaka, senge superplasticizers, retarders, etc. The synergy pakati pezvisanganiswa izvi uye HPMC inogona kugadzirisa zviri nani kuyerera kwedhaka. sex. Semuenzaniso, superplasticizers inogona kuderedza huwandu hwemvura mudhaka uye kugadzirisa fluidity yedhaka, nepo HPMC inogona kuvandudza kuchengetwa kwayo kwemvura uye kuita kwekuvaka uku ichichengetedza viscosity yedhaka.
Kugadziriswa kwemhando dzakasiyana dzedhaka: Mhando dzakasiyana dzedhaka dzine zvakasiyana fluidity zvinodiwa. Semuyenzaniso, plastering dhaka ine yakakwirira fluidity zvinodiwa, nepo masonry dhaka inobhadhara zvakanyanya kusungirirwa kwayo uye ukobvu. Munguva iyi, huwandu uye mhando yeHPMC yakawedzerwa inoda kugadziridzwa uye kugadziridzwa zvinoenderana nezvinodiwa zvemadhaka akasiyana kuti ive nechokwadi chekuyerera uye kuenzanisa.
Sechinhu chinowanzo shandiswa dhaka rekuwedzera,HPMCinogona kunyatsogadzirisa fluidity yedhaka kuburikidza nekukora, kuchengetedza mvura, kupararira, gelling, nezvimwewo. Zvimiro zvayo zvakasiyana zvinoita kuti dhaka rishande uye rigadzikane panguva yekuvaka. Nekudaro, iyo dosage yeHPMC inoda kunyatso gadziridzwa zvinoenderana neyakaomeswa mamiriro ekushandisa kudzivirira kushandisa zvakanyanya izvo zvinotungamira mukuderedzwa kwemvura. Nekuenderera mberi kwekuvandudzwa kwezvinoda kuitwa dhaka muindasitiri yekuvaka, mhedzisiro yeHPMC ine tarisiro yakakura yekushandisa mune ramangwana.
Nguva yekutumira: Jan-10-2025