Hydroxypropyl methylcellulose (HPMC) chinhu chinogoneka uye chakakosha mukuumbwa kwedhaka, ichiita basa rakakosha mukuona huwandu hwese uye kuita kwedhaka. Mortar ndicho chinhu chakakosha chekuvaka chinoshandiswa mukuvaka kusunga zvidhinha, matombo, uye mamwe masonry units pamwechete. Hunhu hwedhaka hunokanganiswa nezvakawanda zvinhu, uye kusarudzwa uye mhando yezvinowedzera (senge HPMC) zvakakosha kuve nechokwadi chekuita kunodiwa.
Nhanganyaya yeHydroxypropyl Methylcellulose (HPMC):
Kemikari chimiro uye chimiro:
Hydroxypropylmethylcellulose ipolymer inotorwa kubva ku cellulose, yakasikwa polymer inowanikwa muchirimwa sero madziro. Iyo kemikari chimiro cheHPMC inoratidzirwa neglucose inodzokorora mayunitsi ane akasiyana hydroxypropyl uye methoxy mapoka akabatanidzwa kune cellulose musana. Dhigirii rekutsiva (DS) remapoka aya rinotarisa zvimiro zveHPMC, kusanganisira solubility, gelation, uye kugona kugadzira firimu.
Manufacturing process:
Kugadzirwa kweHPMC kunosanganisira etherification ye cellulose ine propylene oxide uye methyl chloride. Izvi zvinounza hydroxypropyl uye methoxy mapoka mucheni ye cellulose, ichigadzira polima inonyungudika nemvura ine huwandu hwakawanda hwekushandisa.
Basa reHPMC mudhaka:
Kuchengeta mvura:
Rimwe remabasa ekutanga eHPMC mudhaka kuchengetedza mvura. Iyo hydrophilic chimiro cheHPMC inobvumira kuti itore uye ichengetedze unyoro, ichidzivirira nekukurumidza evaporation panguva yekumisikidza uye kurapa matanho. Izvi zvakakosha kuti uve nechokwadi chekuti hydration yakakodzera yemasimende zvimedu, pakupedzisira zvichibatsira kuvandudza simba uye kusimba kwedhaka.
Kuvandudza machinability:
HPMC inoita senge rheology modifier mudhaka, inovandudza kushanda kwayo uye nyore kushandisa. Iyo polymer ine mafuta ekuzora, inoderedza kupokana pakati pezvimedu uye inofambisa kunyangwe kugovera kwedhaka panguva yekuvaka. Izvi zvakagadziridzwa kushanda zvinonyanya kubatsira mukugadzira masonry, zvichibvumira kunamatira zviri nani uye kuderedzwa kwekushanda kwemuviri panguva yekuvaka.
Wedzera kunamatira uye kubatana:
HPMC ine simba guru pakubatanidza zvivakwa zvedhaka. Iyo polymer inoumba firimu rakatetepa rakatenderedza masimende masimende, ichigadzira yakabatana matrix inosimudzira kunamatira kwedhaka kune masonry unit. Uku kusungirirwa kwakavandudzwa kwakakosha kune chimiro chechimiro chechimiro, kudzivirira kutsemuka uye kuve nechokwadi chekugadzikana kwenguva refu.
Inodzorwa kuseta nguva:
HPMC inogona kukanganisa kuseta nguva yedhaka nekudzora hydration rate yesimende. Iyo polymer inoshanda senge retarder, ichidzikisa pasi maitiro ekuseta uye kuwedzera processability. Izvi zvinonyanya kubatsira mumapurojekiti makuru ekuvaka, uko kunonoka kumisa nguva kunopa kuchinjika kukuru mukushandisa uye kugadzirisa.
Crack resistance:
Kutsemuka idambudziko rinowanzoitika nedhaka uye rinowanzokonzerwa nekuderera panguva yekuomesa. HPMC inobatsira kuderedza dambudziko iri nekuderedza kurasikirwa kwemwando kuburikidza nekuputira, nekudaro kuderedza shrinkage kutsemuka. Iyo polymer's film-forming properties inobatsira kuvandudza dhaka rinopesana nekutsemuka, kuve nechokwadi chekugara kwakasimba uye kunonakidza kupedzisa.
Uniform ruvara uye magadzirirwo:
Pamusoro pebasa rayo rekushanda, HPMC inogona zvakare kuvandudza hunhu hwekunakisa hwedhaka. Iyo polymer inobatsira kuchengetedza ruvara rwakafanana uye magadzirirwo nekudzivirira zvimisikidzo kubva pakuparadzanisa uye kuve nechokwadi chekugovera kunoenderana kwezvinowedzera. Izvi zvinonyanya kukosha mumashandisirwo ekuvaka uko kutaridzika kwedhaka chinhu chakakosha chekugadzira.
Kukanganisa kwemhando yeHPMC padhaka:
Kuchena uye Kuenderana:
Hunhu hweHPMC hunokanganisa zvakananga kuita kwayo mudhaka. Yakakwirira-kuchena HPMC ine inowirirana chemistry inova nechokwadi chekuvimbika uye fungidziro mhedzisiro mukuchengetwa kwemvura, kugadzirisa uye kunamatira. Kusachena kana kuchinjwa kwekuumbwa kunogona kuita kuti dhaka riite zvisingaite, zvichikanganisa hutano hwese hwechivako.
Particle size uye kugoverwa:
Iyo particle size uye kugovera kweHPMC zvimedu zvinoita basa rakakosha mukubudirira kwepolymer mudhaka. Zvimedu zvakanaka zvinopa kuvharika kuri nani uye firimu-kuumba zvivakwa, zvichibatsira kuvandudza kunamatira uye kuchengetedza mvura. Matanho ekudzora emhando panguva yekugadzira maitiro akakosha kuchengetedza inodiwa particle maitiro ekuita kwakaringana.
Dhigirii rekutsinhanisa (DS):
Iyo dhigirii yekutsiva, iyo inomiririra huwandu hwehydroxypropyl uye methoxy mapoka pane cellulose musana, ndiyo yakakosha parameter inokanganisa mashandiro eHPMC. Yepamusoro DS kazhinji inoguma nekuwedzera kunyungudika kwemvura uye kugona kugadzira firimu. Izvo zvinodikanwa chaizvo zvechigadzirwa chedhaka zvinotarisa iyo yakanakira DS, uye misiyano mune iyi parameter inogona kukanganisa kushanda kwepolymer mukuumbwa kwedhaka.
Viscosity kuenderana:
Iyo viscosity yeHPMC mhinduro yakakosha kuti uwane inodiwa rheological zvimiro zvedhaka. Kusapindirana viscosity kunoguma nekuchinja mukugadziriswa uye maitiro ekushandisa. Matanho ekudzora emhando yekuona kuchinjika viscosity kubva pabatch kuenda kubhechi kwakakosha kune yakavimbika kuita kweHPMC mumadhaka.
Kuenderana nezvimwe zvinowedzera:
Maumbirwo ematope anowanzo sanganisira zvakasiyana-siyana zvinowedzera kuti zvizadzise zvinangwa zvekuita. Hunhu hweHPMC hwakakosha kuti ive nechokwadi chekuenderana nezvimwe zvinongedzo zvakaita seanokwidziridza, maretarders kana air-entraining agents. Kusapindirana kunogona kukonzera mhedzisiro yakaipa kusanganisira kuchinjika nguva yekumisikidza, kuderedzwa kwesimba, kana kukanganisa kusimba.
Zvinhu zvekufunga nezvazvo pakusarudza HPMC yekugadzira dhaka:
Zvido zvekushandisa:
Kusarudzwa kweHPMC kunofanirwa kuenderana nezvinodiwa zvedhaka rekushandisa. Mapurojekiti ekuvaka akasiyana angada mazinga akasiyana ekuchengetedza mvura, kushanda kana nguva yekuseta. Kunzwisisa kutsanangurwa kweprojekiti uye mamiriro ezvakatipoteredza kwakakosha pakusarudza iyo yakanyatsokodzera HPMC giredhi.
Simende mhando uye kuumbwa:
Mhando uye kuumbwa kwesimende inoshandiswa mukugadzira dhaka inokanganisa kuenderana uye kuita kweHPMC. Zvinhu zvakadai sekunaka kwemasimende zvimedu uye kuvapo kwezvinhu zvekubatsira simenti zvinofanirwa kuverengerwa pakusarudza HPMC kuve nechokwadi chekubatana pamwe nezvimwe zvikamu.
Environmental conditions:
Mamiriro ekunze uye ezvakatipoteredza panzvimbo yekuvaka anoita basa rakakosha mukuita kwedhaka. Kusarudzwa kweHPMC kunofanirwa kutarisa zvinhu zvakadai sekushisa, hunyoro uye kubuda kwezuva, sezvo zvinhu izvi zvichakanganisa nguva yekuisa uye kushanda kwedhaka.
Regulatory Compliance:
Pakusarudza HPMC yedhaka zvikumbiro, kuteedzera zviyero uye zvitupa kwakakosha. Kutevedzera zviyero zveindasitiri kunovimbisa kuenderana uye kunaka mukugadzirwa kwechigadzirwa, kuderedza njodzi yezvinetso zvisingatarisirwe panguva yekuvaka.
mukupedzisa:
Muchidimbu, hydroxypropyl methylcellulose (HPMC) i polymer yakawanda ine basa rakakura pamhando yedhaka mumashandisirwo ekuvaka. Basa rayo mukuchengetedza mvura, kushanda, kunamatira uye kusagadzikana kwekuputika kunoita kuti ive chinhu chakakosha mukugadzira dhaka razvino. Hunhu hweHPMC hwakakosha sezvo huchikanganisa kuita kwayo zvakananga uye nekudaro huwandu hwese hwezvivakwa zviri kuvakwa.
Kunzwisisa kemikari uye kushanda kweHPMC mumatope kunogona kupa ruzivo rwakakosha mukushandiswa kwayo uye kugonesa sarudzo dzine ruzivo panguva yekusarudza nekugadzira maitiro. Matanho ekutonga kwemhando, kuenderana kwekuita, uye kutariswa kwezvido zveprojekiti zvinhu zvakakosha pakuona kuvimbika, kushandiswa kunoshanda kweHPMC mumadhaka.
Nguva yekutumira: Zvita-18-2023