Dope musanganiswa wesimende, jecha nemvura unoshandiswa muindasitiri yekuvaka kuita zvakasiyana siyana semasonry, plastering nekugadzirisa mataira.Unhu hwedhaka hunokosha zvikuru pakugara uye kusimba kwechivako.Mhepo yemhepo yevhu inoita basa guru mukushanda kwedhaka.Kuvapo kwemabhuru emhepo mudhaka kunonatsiridza kushanda kwayo, kunoderedza shrinkage uye kuputika, uye kunowedzera kupisa kwayo kwekudzivirira.Cellulose ethers, senge hydroxypropylmethylcellulose (HPMC) uye methylhydroxyethylcellulose (MHEC), inoshandiswa zvakanyanya muindasitiri yekuvaka sezvinowedzera kuvandudza kunaka uye kushanda kwematope.Ichi chinyorwa chinokurukura mhedzisiro ye cellulose ethers pamhepo yemukati yematope.
Mhedzisiro ye cellulose ether pamhepo yemukati medhaka:
Mhepo yemukati medhaka inoenderana nezvinhu zvakasiyana senge mvura-simende ratio, jecha-simende ratio, nguva yekusanganisa, uye nzira yekusanganisa.Kuwedzerwa kwe cellulose ethers kudhaka kunogona kukanganisa zvakanyanya mhepo yayo.HPMC neMHEC ma hydrophilic polymers anogona kutora mvura uye kuparadzira zvakaenzana mumusanganiswa wedhaka.Vanoita sevanoderedza mvura uye vanovandudza kushanda kwedhaka.Kuwedzera cellulose ethers kumusanganiswa wedhaka kunoderedza huwandu hwemvura hunodiwa kuti uwane kuenderana kunodiwa, nekudaro kuderedza mhepo yedhaka.
Zvisinei, mhedzisiro ye cellulose ethers pamhepo yezvinyorwa zvematope haisi nguva dzose yakaipa.Izvi zvinoenderana nechiyero uye mhando ye cellulose ether inoshandiswa.Kana yakashandiswa muhuwandu hwakakodzera, cellulose ethers inogona kuwedzera mhepo yezvinyorwa zvematope nekuwedzera kugadzikana kwavo uye kuderedza kusarura.Cellulose ether inoshanda seyakagadzikana, iyo inogona kunyatsodzivirira kudonha kwepores panguva yekugadzika uye kuoma kwedhaka.Izvi zvinowedzera kusimba uye kusimba kwedhaka.
Chimwe chinhu chinokanganisa mhepo yemhepo yevhu ndiyo nzira yakakodzera yekusanganisa.Dry kusanganiswa kwe cellulose ether ine dhaka hazvikurudzirwe sezvo zvichizotungamira mukusangana kwe cellulose ether particles uye kuumbwa kwemapundu mudhaka.Kusanganiswa kwemvura kunokurudzirwa sezvo kunovimbisa kupararira kwehomogeneous ye cellulose ether mumusanganiswa wedhaka uye inovandudza kushanda kwayo.
Zvakanakira kushandisa cellulose ether mudhaka:
Cellulose ethers seHPMC neMHEC inopa zvakati wandei zvakanakira kana ichishandiswa mumatope.Vanovandudza kushanda uye kunamatira kwedhaka, kuderedza mvura-simende reshiyo uye kuwedzera kuwirirana kwedhaka.Vanowedzera kusimba, simba uye elasticity yematope.Cellulose ethers inoshanda seyakakora uye inodzikamisa uye inodzivirira kudonha kwemabhuru emhepo panguva yekumisikidza uye kuoma kwedhaka.Izvi zvinowedzera kutonhora-kunyungudika kuramba, kunoderedza shrinkage uye kunatsiridza kuputika.Cellulose ether inewo yakanaka kuchengetedza mvura, nekudaro inovandudza kurapa uye hydration yedhaka.
Kupfupisa, HPMC, MHEC uye mamwe ether cellulose anoshandiswa zvakanyanya sekuwedzera muindasitiri yekuvaka kuvandudza kunaka uye kuita kwedhaka.Mhepo yevhu yevhu chinhu chakakosha chinokanganisa kushanda kwayo, uye kuwedzera kwe cellulose ether kunogona kukanganisa zvakanyanya mhepo yevhu.Zvisinei, mhedzisiro ye cellulose ethers pamhepo yezvinyorwa zvematope haisi nguva dzose yakaipa.Cellulose ethers inogona kuwedzera mhepo yedhaka uye inovandudza kushanda kwayo kana yakashandiswa muhuwandu hwakakodzera uye nenzira dzakakodzera dzekusanganisa.Zvakanakira kushandisa cellulose ethers mudhaka zvinosanganisira kuvandudzwa kwekushanda, kunamatira, kusimba, kusimba, simba uye elasticity yedhaka, pamwe nekuderedzwa shrinkage uye kuvandudza kutsemuka kuramba.
Nguva yekutumira: Aug-22-2023