HPMC inogona kukamurwa kuita giredhi rekuvaka, giredhi rechikafu uye giredhi remishonga zvichienderana nechinangwa. Parizvino, zvigadzirwa zvakawanda zvemumba ndezvekuvaka, uye mugiredhi rekuvaka, huwandu hweputty powder hwakakura kwazvo. Sanganisa HPMC powder nezvimwe zvinhu zvakawanda zvine hupfu, zvisanganise zvakanaka nemuchina wekusanganisa, wobva wawedzera mvura kuti inyunguduke, ipapo HPMC inogona kunyungudutswa panguva ino pasina kuungana, nekuti kona yega yega diki, hupfu hushoma hweHPMC, hunosangana nemvura. Hunonyunguduka pakarepo. Vagadziri veputty powder nemortar vanoshandisa nzira iyi. Hydroxypropyl methylcellulose (HPMC) inoshandiswa sechinhu chinosimbisa uye chinochengetedza mvura mumortar yeputty powder.
Tembiricha yejel yeHPMC ine chekuita nehuwandu hwayo hwemethoxy, kana methoxy iri pasi ↓, tembiricha yejel iri yakakwira ↑. Rudzi rweHPMC rwemvura inotonhora inorapwa pamusoro neglyoxal, uye inopararira nekukurumidza mumvura inotonhora, asi hainyungudike zvechokwadi. Inonyungudika chete kana viscosity yawedzera. Mhando dzemvura inonyungudika dzinopisa hadzina kurapwa pamusoro neglyoxal. Kana huwandu hweglyoxal hwakakura, kupararira kuchakurumidza, asi viscosity ichawedzera zvishoma nezvishoma, uye kana huwandu hwacho huri hudiki, zvakapesana zvichava zvechokwadi. HPMC inogona kukamurwa kuita mhando yekukurumidza uye mhando yekupisa. Rudzi rwemvura inovhungudika nekukurumidza mumvura inotonhora uye inonyangarika mumvura. Panguva ino, mvura haina viscosity nekuti HPMC inongopararira mumvura isina kunyungudika chaiko. Anenge maminetsi maviri, viscosity yemvura inowedzera zvishoma nezvishoma, ichigadzira colloid yakajeka inonyungudika. Zvigadzirwa zvinopisa, kana zvikasangana nemvura inotonhora, zvinogona kupararira nekukurumidza mumvura inopisa uye zvinonyangarika mumvura inopisa. Kana tembiricha yadzikira kusvika patembiricha yakati, viscosity inooneka zvishoma nezvishoma kusvika yagadzira colloid inoonekera yakajeka. Rudzi rwehot-melt runogona kushandiswa chete muputty powder nemortar. Muliquid glue nependi, pachava neboka rezviitiko uye harugone kushandiswa. Rudzi rweinstant type rune mashandisirwo akasiyana-siyana. Runogona kushandiswa muputty powder nemortar, pamwe neliquid glue nependi, pasina chero chipingamupinyi.
HPMC inogadzirwa nenzira yekunyungudutsa inoshandisa toluene neisopropanol sezvinhu zvinonyungudutsa. Kana kusukwa kusina kunaka, pachava nekunhuhwirira kwasara. Kushandiswa kweputty powder: zvinodiwa zvakaderera, viscosity ndeye 100,000, zvakakwana, chinhu chakakosha kuchengetedza mvura zvakanaka. Kushandiswa kwemortar: zvinodiwa zvakanyanya, viscosity yakawanda, 150,000 zviri nani. Kushandiswa kweglue: zvigadzirwa zvepakarepo zvine viscosity yakawanda zvinodiwa. Huwandu hweHPMC hunoshandiswa mukushandiswa kunoshanda hunosiyana zvichienderana nemamiriro ekunze, tembiricha, mhando yecalcium yemuno, fomura yeputty powder uye "hunhu hunodiwa nevatengi". Viscosity yehydroxypropyl methylcellulose (HPMC)-putty powder inowanzova 100,000, uye chinodiwa chemortar chakakwira, uye inoda 150,000 kuti ive nyore kushandisa. Uyezve, basa guru reHPMC kuchengetedza mvura, kuchiteverwa nekukora. Muupfu hweputty, chero bedzi mvura iri kuchengetwa zvakanaka uye viscosity yakaderera (70,000-80,000), zvinogonekawo. Ehe, viscosity yakakwira, mvura iri kuchengetwa zvakanaka. Kana viscosity ikadarika 100,000, viscosity inokanganisa kuchengetwa kwemvura. Kwete zvakanyanya; avo vane hydroxypropyl yakawanda vanowanzo chengetwa zvakanaka nemvura. Iyo ine viscosity yakakwira inochengetwa zvakanaka nemvura, uye iyo ine viscosity yakakwira inoshandiswa zviri nani mumota yesimende.
Muupfu hweputty, HPMC inoita mabasa matatu ekuwedzera kukora, kuchengetedza mvura uye kuvaka. Usatore chikamu mune chero reactions. Chikonzero chemabubbles chingave chekuti mvura yakawandisa inoiswa mukati, kana kuti kungave kuti chidimbu chepasi hachina kuoma, uye chimwe chidimbu chinokweshwa pamusoro, uye zviri nyore kupumha furo. HPMC muupfu hweputty inokora: cellulose inogona kukora kuti irambe yakakora, kuchengetedza mhinduro yakafanana uye yakafanana, uye kudzivirira kudzika. HPMC muupfu hweputty inochengetedza mvura: inoita kuti upfu hweputty huome zvishoma nezvishoma, uye inobatsira ash calcium kuita chiito pasi pesimba remvura. HPMC muupfu hweputty inovaka: cellulose ine mafuta anozora, izvo zvinogona kuita kuti upfu hweputty huve nekuvaka kwakanaka. HPMC haibatanidzi mune chero reactions yemakemikari, asi inongoita basa rekubatsira chete.
Kurasikirwa kweupfu hweputty powder kunonyanya kuenderana nemhando yecalcium yeash, uye hakuna chekuita neHPMC. Kuderera kwecalcium mugray calcium uye chiyero chisina kunaka cheCaO neCa(OH)2 mugray calcium zvichakonzera kurasikirwa kweupfu. Kana zvine chekuita neHPMC, saka kana kuchengetwa kwemvura kweHPMC kusina kunaka, zvichaitawo kuti upfu huonde. Kuwedzera mvura kuputty powder woiisa pamadziro inyaya yemakemikari, nekuti zvinhu zvitsva zvinoumbwa, uye putty powder iri pamadziro inobviswa pamadziro. Pasi, yopwanywa kuita upfu, uye yoshandiswazve, hazvishande, nekuti zvinhu zvitsva (calcium carbonate) zvaumbwa. Zvinhu zvikuru zviri muupfu hwecalcium yemadota ndeizvi: musanganiswa weCa(OH)2, CaO uye huwandu hushoma hweCaCO3, CaO+H2O=Ca(OH)2—Ca(OH)2+CO2=CaCO3↓+H2O Kalsiamu yemadota iri mumvura nemhepo Pasi pekushanda kweCO2, calcium carbonate inogadzirwa, nepo HPMC ichingochengeta mvura chete, ichibatsira kuita zviri nani kwecalcium yemadota, uye haibatanidzwi mune chero chiito pachayo.
Nguva yekutumira: Kurume-18-2023