1. Pfupiso yeHPMC
Hydroxypropyl methylcellulose (HPMC muchidimbu) chinhu chinoshandiswa zvakanyanya mukugadzira, kuputira, mishonga, chikafu nedzimwe nzvimbo. HPMC inowanikwa nekuchinja kwemakemikari e cellulose yechisikigo, ine kunyungudika kwemvura uye inoenderana nehupenyu, uye hainyungudike muzvinhu zvinonyungudutsa. Nekuda kwekunyungudika kwayo kwakanaka kwemvura, kunamira, kukora, kumisa uye zvimwe zvinhu, HPMC yakashandiswa zvakanyanya muindasitiri yekuvaka, kunyanya mukushandisa putty powder.
2. Basa reHPMC muupfu hweputty
Putty powder chinhu chinoshandiswa pakugadzirisa madziro, uye zvikamu zvayo zvikuru zvinozadza uye zvinosunga. HPMC, sechinhu chinowanzo simbisa uye chinochengetedza mvura, inogona kuvandudza mashandiro eputty powder, kunyanya kusanganisira zvinotevera:
Kukora: HPMC inogadzira mushonga we colloidal mushure mekunyungudika mumvura, une simba guru rekukora, inogona kuvandudza hunhu hwe rheological hwe putty powder, kuita kuti ive ne viscosity yakakodzera, kudzivirira kutetepa zvakanyanya pakuisa, uye kuvandudza kugadzikana kwekushanda.
Kuvandudza mashandiro ekuvaka: Kusimba kweHPMC hakungoiti kuti upfu hweputty husanyanya kudonha kana kudonha panguva yekuisa, asiwo kunosimudzira kunamira kweupfu hweputty, zvichiita kuti zvive nyore kuisa pamadziro, nokudaro zvichivandudza kushanda zvakanaka kwekuvaka.
Kuvandudza kuchengetwa kwemvura: HPMC inogona kuchengetedza mvura zvakanaka muupfu hweputty uye kuderedza mwero wekubuda kwemvura. Izvi zvinogona kudzivirira pamusoro peupfu hweputty kuti husaome nekukurumidza, kuve nechokwadi chekuti hunoshanda panguva yekuvaka, uye kudzivirira kutsemuka nekudonha.
Kuvandudza kubata uye kutsvedzerera kwepamusoro: HPMC haingogone chete kuwedzera kupfava kweputty powder, asiwo inovandudza kupfava kwayo pamusoro, zvichiita kuti putty layer ive yakapfava, izvo zvinobatsira pakupenda kunotevera. Munguva yekuvaka, HPMC inogona kupa kupfava kuri nani uye kuderedza kugadzirwa kwezvikanganiso nemabubbles.
Kuvandudza kugadzikana kwekuvaka: Kuwedzerwa kweHPMC kunogona kuvandudza kudzivirira kunaya kweputty powder, kudzivirira kuiswa kwezvidimbu zvidiki mairi, uye kuve nechokwadi chekuti mhando uye mashandiro eputty powder hazvizoshanduke zvakanyanya panguva yekuchengetwa kwenguva refu.
Kuvandudza kusimba kwekuputika: Kuburikidza nekuchengetedza mvura uye kusimba kweHPMC, kusimba kwekuputika kweputty powder kunogona kuvandudzwa, kusimba kwemadziro kunogona kudzivirirwa, uye hupenyu hwebasa hunogona kuwedzerwa.
3. Kusviba kwakakodzera kweHPMC
Mhedzisiro yeHPMC mupudhi yeputty yakabatana zvakanyanya nekusimba kwayo. Sarudzo yekusimba inofanira kusarudzwa zvichienderana nezvinodiwa zvepudhi yeputty nenzvimbo yekuvaka. Kazhinji, kusimba kweHPMC kunobva pamazana kusvika kumakumi ezviuru zve millipoise (mPa·s), pakati payo kusimba kwakasiyana kwakakodzera mhando dzakasiyana dzepudhi yeputty uye zvinodiwa zvekuvaka.
Kusviba kwakaderera kweHPMC (inenge 1000-3000 mPa·s): yakakodzera upfu hweputty hwakareruka kana base putty, hunonyanya kushandiswa mumamiriro ezvinhu apo kunodiwa kuyerera kwakanyanya. Kusviba kwakaderera kweHPMC kunogona kupa mashandiro ari nani ekuputira, zvichiita kuti upfu hweputty huve nyore kushandisa, asi kuchengetedza mvura uye kuramba kutsemuka hazvina kusimba.
Kusviba kwepakati nepakati HPMC (inenge 3000-8000 mPa·s): yakakodzera mafomura eupfu hweputty akajairika, ayo anogona kuchengetedza mvura zvakanaka uye kudzivirira kunaya kwemvura uku achichengetedza kuyerera kwakanaka. HPMC yekusviba uku haingogone kugutsa zvinodiwa zvekuputira panguva yekuvaka chete, asiwo inodzivirira zvinobudirira matambudziko akadai sekutsemuka nekudonha.
HPMC ine viscosity yakakura (inenge 8000-20000 mPa·s): yakakodzera zvidimbu zvakakora zveputty powder kana zviitiko zvinoda simba rakasimba rekukora. HPMC ine viscosity yakakura inogona kupa kushanda kwakanaka kwekuputira uye kugadzikana, uye yakakodzera kushandiswa kwekuputira kunoda kubata kwakasimba uye kutsetseka, asi zvinofanira kucherechedzwa kuti viscosity yakanyanya inogona kukonzera kuti putty powder ive yakamanikana zvakanyanya uye kukanganisa mashandiro ekuvaka.
Mukushandiswa kwaro, viscosity yakakodzera yeHPMC inofanira kusarudzwa zvichienderana nekushandiswa uye nzira yekuvaka yeputty powder. Semuenzaniso, kana madziro ari akaomarara kana kuti panodiwa mavakirwo akawanda, viscosity yakakura yeHPMC inogona kusarudzwa kuti iwedzere kunamira uye kuramba kutsemuka kwependi; nepo mune dzimwe nguva zvinoda kuyerera kwakanyanya uye kuvaka nekukurumidza, viscosity yakaderera kusvika pakati nepakati yeHPMC inogona kusarudzwa.
Hydroxypropyl methylcellulosechinhu chakakosha chekuwedzera kuvaka chinogona kuvandudza mashandiro ekuvaka, kuchengetedza mvura, kunamira uye kuramba kutsemuka kweputty powder. Kusarudza HPMC viscosity yakakodzera kwakakosha pakushandisa putty powder. Viscosities dzakasiyana dzinogona kugadziriswa zvichienderana nerudzi rweputty powder, nzvimbo yekuvaka, uye zvinodiwa pakushanda. Mukugadzirwa chaiko nekuvaka, kudzora viscosity yeHPMC kunogona kuwana mhedzisiro yakanaka yekuvaka uye kushanda kwenguva refu. Naizvozvo, zvichienderana nezvinodiwa zvekuvaka zvakasiyana, kusarudza nekugadzirisa viscosity yeHPMC zvine musoro idanho rakakosha rekuona mashandiro uye mhando yeputty powder.
Nguva yekutumira: Kurume-25-2025