Hydroxypropyl methylcellulose (HPMC) ipurasitiki inoshandiswa zvakanyanya mukuvaka, kunyanya mu gypsum facing plaster, uko inoita basa rakakosha. Sekuwedzera, HPMC inogona kuvandudza mashandiro ekushanda, kuchengetedza mvura uye kunamira kwe gypsum facing plaster, saka inoshandiswa zvakanyanya mukuvaka nekushongedza.
1. Hunhu hwekutanga hweHPMC
HPMC imhando ye cellulose ether isingashandisi ionic ine simba rekunyungudika kwemvura uye inoita kuti iite seyakakora. Inogona kunyungudika nekukurumidza mumvura kuti igadzire mvura yakafanana yecolloidal, uye ine kunamatira kwakanaka, mafuta, kugadzira firimu uye kuchengetedza mvura. Hunhu uhwu hunoita kuti HPMC ishandiswe zvakanyanya mukuvaka, kunyanya yakakodzera kushandiswa muzvinhu zvakagadzirwa negypsum.
Hunhu hukuru hweHPMC hunosanganisira zvinhu zvinotevera:
Kuchengetwa kwemvura: HPMC inogona kuchengetedza hunyoro muplaster inotarisana negypsum, nokudaro ichiwedzera nguva yekuvhurika uye nguva yekushanda kwechinhu chacho.
Kukora: Sechinokora, HPMC inogona kuwedzera kunaka kwepurasita, kudzivirira kudzika, uye kuvandudza kukwesha.
Kunyorovesa: Hunhu hwekunyorovesa hweHPMC hunovandudza kubata kweplaster uye hunoita kuti kuvaka kuve nyore.
Hunhu hwekugadzira firimu: Inogona kugadzira firimu rinodzivirira pamusoro pepurasita, zvichivandudza kuramba kwepurasita.
2. Maitiro ekushanda kweHPMC mu gypsum facing plaster
Mushure mekuwedzera HPMC kune gypsum facing plaster, hunhu hwezvinhu zvinovandudzika zvikuru mune zvinotevera:
Kuvandudza kuchengetwa kwemvura: Munguva yekuvaka plaster inotarisana negypsum, kana kurasikirwa nemvura kuchikurumidza, zvichaita kuti pave nekuomarara kusina kuenzana, kutsemuka uye simba rayo ridzikire. HPMC inogona kugadzira firimu remvura rakapfava muplaster, zvichiita kuti mvura ibude ichikurumidza kubuda, zvichiita kuti plaster irambe iine mvura yakakwana panguva yekuomesa, zvichiita kuti iome zvakaenzana, zvichiita kuti isatsemuke.
Kuvandudza kunamira: HPMC inogona kugadzira firimu rakatetepa pamusoro pepurasita, izvo zvinogona kuwedzera kunamira kana zvasvika pamusoro pepurasita, kuitira kuti kunamira kwepurasita pamadziro kuwedzere. Kunyanya pasubstrates dzine maburi uye dzakaoma, simba rekuchengetedza mvura reHPMC rinogonawo kudzivirira substrate kuti isanyure mvura nekukurumidza, nokudaro zvichivandudza kubatana kwayo.
Wedzera kusimba kwekuputika: Gypsum facing plaster inogona kupwanyika nekuda kwekuchinja kwekupisa nehunyoro.HPMC inononotsa mwero wekuoma kwemvura nekugadzirisa mwero wekubuda kwemvura, nokudaro ichideredza njodzi yekutsemuka kweplaster layer. Panguva imwe chete, colloid film yakagadzirwa neHPMC inogonawo kupa dziviriro yekudzivirira plaster kubva pakutsemuka.
Kuvandudza kushanda: HPMC inogona kuwedzera kunaka kwepurasita uye purasitiki, zvichiita kuti zvive nyore kushandisa pakukwesha nekuyera. HPMC inovandudza kushanda kwepurasita, uye vashandi vekuvaka vanogona kudzora ukobvu nekutsetseka kwayo nemazvo, izvo zvinobatsira kuti ipedzise zvakanaka.
3. HPMC inovandudza mashandiro eplasta inotarisana negypsum
Kuwedzerwa kweHPMC kune zvakawanda zvakavandudzika pakushanda kweplaster inotarisana negypsum, zvinosanganisira:
Kuvandudzwa kwetsinga dzeropa: HPMC inogona kuwedzera zvakanyanya kunaka kwepurasita, kudzora kuyerera kwepurasita, kudzivirira matambudziko ekudonha, uye kuvandudza mashandiro ekukwesha kwepurasita.
Kudzivirira chando zvakanyanya: Firimu recolloid rakagadzirwa neHPMC rine simba rekudzivirira plaster kusvika pamwero wakati, richidzivirira plaster kuti isaome kana kutsemuka munzvimbo dzine tembiricha yakaderera, uye richivandudza kudzivirira chando kwechinhu chacho.
Kudzivirira kudzikira kwesimba:HPMC inowedzera hunyoro mupurasita, inoderedza dambudziko rekupwanyika kunokonzerwa nekubuda kwemvura, uye inoita kuti purasita igare yakasimba uye isatsemuke zvakanyanya.
Kunamira kwakavandudzwa: Hunhu hwekubatanidza hweHPMC hunogona kuvandudza kunamira kweplaster pamusoro pe substrate, zvichiita kuti coating isanyanya kudonha.
4. Kuchenjerera pakushandisa HPMC
Kunyangwe HPMC ine mabhenefiti akawanda ekugadzira gypsum facing plaster, zvinhu zvinotevera zvinofanirawo kucherechedzwa mukushandiswa kwayo:
Kudzora huwandu hwekuwedzera: Kuwedzera HPMC zvakanyanya kuchaita kuti plaster inamire zvakanyanya, zvichiita kuti zviome kupfava, zvichikanganisa mhedzisiro yekuvaka. Kazhinji, huwandu hwekuwedzera hweHPMC hunofanira kudzorwa mukati me0.1%-0.5%, uye kugadziriswa zvichienderana nezvinodiwa chaizvo.
Kunyangwe kusanganisa:HPMC inofanira kusanganiswa zvizere kana yasanganiswa nezvinhu zvakaita segypsum kuti ive nechokwadi chekuti yapararira zvakaenzana uye inoshanda zvakaenzana. HPMC inogona kunyungudutswa mumvura kutanga, yozowedzerwa kugypsum kuti isanganiswe, kana kuti inogona kusanganiswa zvakaenzana padanho rehupfu hwakaoma.
Kuenderana nezvimwe zvinowedzerwa: Mu gypsum facing plaster, HPMC inowanzoshandiswa nezvimwe zvinowedzerwa, zvakaita sezvinoderedza mvura, zvinochengetedza mvura, nezvimwewo. Pakuwedzera zvinowedzerwa zvakawanda, nyatsoteerera kuenderana kwazvo kuti usapindirane zvinokanganisa mashandiro.
5. Kukosha kweHPMC muindasitiri
Mu gypsum facing plaster nezvimwe zvinhu zvekuvaka, HPMC, sechinhu chakakosha chekuwedzera, inoita basa rakakosha mukuvandudza mashandiro emidziyo nekuda kwekuchengetedza kwayo mvura, kunamira, kukora uye kuramba kutsemuka. Mumakore achangopfuura, nekuwanda kwekudiwa kwezvinhu zvekuvaka zvakasvibira, hunhu hwekuchengetedza zvakatipoteredza hweHPMC hwakaitawo kuti ifarirwe zvishoma nezvishoma nemusika. Muzvivakwa zvemazuva ano, HPMC haingogadzirise chete mashandisirwo egypsum facing plaster, asiwo inovandudza kunaka kwekuvaka uye kushanda zvakanaka, uye inokurudzira kuvandudzwa kwetekinoroji yekuvaka.
Kushandiswa kweHPMC mu gypsum plaster hakungobatsiri chete kuchengetedza mvura, kunamira uye kuramba kutsemuka kwezvinhu, asiwo kunovandudza mashandiro ekuvaka, zvichiita kuti ive chinhu chakakosha pakuvaka. Hunhu hwakasiyana hweHPMC uye kuvandudzwa kwemaitiro akasiyana-siyana kwakaita kuti ive yakakosha mukuvaka, ichipa rutsigiro rwakasimba rwehunyanzvi hwekugadzira zvivakwa zvemhando yepamusoro uye zvinogara kwenguva refu. Mune ramangwana, nekuvandudzwa kuri kuramba kuchiitwa kwetekinoroji yekuvaka, mikana yekushandiswa kweHPMC muzvigadzirwa zvegypsum ichave yakakura.
Nguva yekutumira: Mbudzi-19-2024