Dry mortar, inozivikanwawo sewall putty, musanganiswa unoshandiswa kutsvedzerera uye kuyera mukati nekunze madziro asati apenda. Chimwe chezvinhu zvakakosha zvedhaka rakaoma hydroxypropyl methylcellulose (HPMC), inoshanda seyakakora uye bhainda. Paunenge uchigadzira putty poda yakaoma dhaka, sarudzo chaiyo yeHPMC viscosity yakakosha kuve nechokwadi chemhando yechigadzirwa chekupedzisira.
HPMC is a cellulose ether, inogadzirwa nekurapa cellulose nealkali uyezve kuita nemethyl chloride uye propylene oxide. HPMC chinhu chakasiyana-siyana chinowanzoshandiswa mumhando dzakasiyana dzekushandisa, kusanganisira muindasitiri yekuvaka yekugadzira putty dry mortars. HPMC inovandudza kushanda kweputty poda yakaoma dhaka nekusimudzira kuchengetedza kwayo kwemvura, kushanda uye kushanda kwekubatana.
Iyo viscosity yeHPMC chinhu chakakosha kuona kushanda kweputty powder dry mortar. Viscosity chiyero chekuramba kwemvura kuyerera, inowanzoratidzwa mu centipoise (cP). HPMC inowanikwa muviscosities kubva pa100 cP kusvika 150,000 cP uye, zvichienderana nekushandiswa, magiredhi akasiyana eHPMC anowanikwa ane maviscosities akasiyana.
Paunenge uchigadzira putty poda yakaoma dhaka, kusarudzwa kweHPMC viscosity kunofanirwa kuenderana nezvinhu zvakati wandei, senge chimiro chezvimwe zvinongedzo, inodiwa dhaka kuwirirana, uye mamiriro ekunze. Kazhinji, epamusoro viscosity HPMCs anoshandiswa kune yakakora uye inorema madhaka, nepo yakaderera viscosity HPMCs inoshandiswa kune dzakatetepa uye dzakareruka dhaka.
Imwe yemabhenefiti makuru ekushandisa HPMC mune putty dry mortars kugona kwayo kuwedzera kuchengetwa kwemvura. HPMC inotora uye inochengeta mwando, iyo inobatsira kudzivirira dhaka kubva pakuoma nekukasira. Izvi zvinonyanya kukosha munzvimbo dzinopisa, dzakaoma, sezvo dhaka rinogona kuoma nokukurumidza, zvichiita kuti pave nekutsemuka uye kusanamatira zvakanaka. Higher viscosity HPMCs inokwanisa kuchengetedza mvura yakawanda, zvichiita kuti ive yakakodzera kushandiswa mumamiriro akaoma.
Chimwe chinhu chakakosha cheHPMC kugona kwayo kuvandudza kushanda. HPMC inoita semafuta ekuzora, zvichiita kuti zvive nyore kuti dhaka ripararire uye kudzikisa kuedza kunodiwa kuti uwane nzvimbo yakatsetseka. Lower viscosity HPMCs anowanzo shandiswa kuita nyore kugadzirisika, nepo epamusoro viscosity HPMCs achishandiswa kune zvakanyanya kunetsa maapplication.
Pamusoro pekuchengetedza kwayo mvura uye kushanda kwayo, HPMC inogonawo kuvandudza kushanda kwekubatanidza kweputty poda yakaoma dhaka. HPMC inopa chisungo chakasimba pakati pedhaka nepamusoro pairi kupendwa, kuve nechokwadi chekuti dhaka rinogara riri panzvimbo uye haritseki kana kubuda. Sarudzo yeHPMC viscosity ichave nemhedzisiro padanho rekunamatira rinopihwa nedhaka, nepamusoro viscosity HPMCs kazhinji inopa kunamira kuri nani.
Kazhinji, kusarudzwa kweHPMC viscosity chinhu chakakosha kutariswa paunenge uchigadzira putty poda yakaoma dhaka, uye inofanirwa kuitwa zvinoenderana neyakajeka mashandisirwo uye mamiriro ezvakatipoteredza. Nekusarudza iyo giredhi chaiyo yeHPMC, kuchengetwa kwemvura, kushanda uye kubatanidza zvivakwa zvedhaka zvinogona kuvandudzwa, kuve nechokwadi chekupedza kwemhando yepamusoro. Nesarudzo chaiyo yeHPMC viscosity, zvinokwanisika kugadzira yakaomeswa putty dhaka yemhando inowirirana inogona kushandiswa zviri nyore uye zvinobudirira mumhando dzakasiyana dzekuvaka.
Nguva yekutumira: Jul-28-2023