HPMC inogona kukamurwa kuita giredhi rekuvaka, giredhi rekudya uye giredhi remishonga zvinoenderana nechinangwa. Parizvino, mazhinji ezvigadzirwa zvepamba magiredhi ekuvaka, uye mumagiredhi ekuvaka, huwandu hweputty hupfu hwakakura kwazvo. Sanganisa HPMC poda nehuwandu hwakawanda hwezvimwe zvinhu zvehupfu, zvisanganise zvakakwana nemusanganisi, uye wobva wawedzera mvura kuti inyunguduke, ipapo HPMC inogona kunyungudutswa panguva ino pasina kusanganiswa, nekuti kona yega yega, diki diki yeHPMC hupfu, inosangana. mvura. ichanyungudika pakarepo. Putty poda uye vagadziri vedhaka vanowanzo shandisa nzira iyi. Hydroxypropyl methylcellulose (HPMC) inoshandiswa sechinhu chakakora uye chekuchengetedza mvura mu putty powder mortar.
Iyo tembiricha yegel yeHPMC ine hukama neiyo methoxy yemukati, iyo yakadzika iyo methoxy yemukati ↓, iyo yakakwira tembiricha yegel ↑. Iyo inotonhora yemvura inotonhora yemhando yeHPMC inorapwa pamusoro neglyoxal, uye inopararira nekukurumidza mumvura inotonhora, asi haina kunyatso kunyungudika. Inonyungudika chete kana viscosity ichiwedzera. Mhando dzinopisa dzakanyungudika hadzina kubatwa pamusoro ne glyoxal. Kana huwandu hweglyoxal hwakakura, kupararira kuchakurumidza, asi viscosity ichawedzera zvishoma nezvishoma, uye kana mari yacho iri duku, zvinopesana zvichave zvechokwadi. HPMC inogona kukamurwa kuva pakarepo mhando uye inopisa-kuparara mhando. Iko pakarepo rudzi chigadzirwa chinopararira nokukurumidza mumvura inotonhora uye inonyangarika mumvura. Panguva ino, mvura haina viscosity nekuti HPMC inongoparadzirwa mumvura pasina kuparara chaiko. Inenge maminetsi maviri, viscosity yemvura inowedzera zvishoma nezvishoma, ichigadzira yakajeka viscous colloid. Zvigadzirwa zvinopisa zvinonyunguduka, kana zvasangana nemvura inotonhora, zvinogona kupararira nekukurumidza mumvura inopisa uye kunyangarika mumvura inopisa. Kana tembiricha yadzikira kune imwe tembiricha, viscosity inozoonekwa zvishoma nezvishoma kusvika yaita yakajeka viscous colloid. Iyo inopisa-yakanyunguduka mhando inogona kungoshandiswa muputty poda uye dhaka. Mumvura glue uye pendi, pachave nemapoka chiitiko uye hachigone kushandiswa. Rudzi rwepakarepo rune huwandu hwakakura hwemaapplication. Inogona kushandiswa mu putty poda uye dhaka, pamwe chete nemvura glue uye pendi, pasina contraindications.
Iyo HPMC inogadzirwa nenzira yekunyungudutsa inoshandisa toluene uye isopropanol sezvinonyungudutsa. Kana kushambidzika kusina kunaka, pachava nekunhuhwirira kwakasara. Kushandiswa kweputty powder: zvinodiwa zvakaderera, viscosity ndeye 100,000, yakakwana, chinhu chinokosha ndechokuchengeta mvura zvakanaka. Kushandiswa kwedhaka: zvinodiwa zvepamusoro, high viscosity, 150,000 zviri nani. Kushandiswa kweglue: zvigadzirwa zvekukurumidza zvine viscosity yakakwirira zvinodiwa. Huwandu hweHPMC hunoshandiswa mumashandisirwo anoshanda hunosiyana zvichienderana nemamiriro ekunze, tembiricha, yemunharaunda ash calcium quality, putty powder formula uye "mhando inodiwa nevatengi". Iyo viscosity yehydroxypropyl methylcellulose (HPMC) -putty powder inowanzoita 100,000, uye chinodiwa chedhaka chakakwirira, uye chinoda 150,000 kuti ive nyore kushandisa. Uyezve, basa guru reHPMC kuchengetedza mvura, rinoteverwa nekukora. Mune putty powder, chero bedzi kuchengetwa kwemvura kwakanaka uye viscosity yakaderera (70,000-80,000), zvinogonekawo. Zvechokwadi, iyo yakakwirira viscosity, zviri nani kuchengetedza mvura. Kana iyo viscosity inopfuura 100,000, iyo viscosity inokanganisa kuchengetwa kwemvura. Kwete zvakanyanya; avo vane yakakwira hydroxypropyl zvemukati kazhinji vane zvirinani kuchengetedza mvura. Iyo ine high viscosity ine nani kuchengetedza mvura, uye iyo ine yakakwira viscosity inoshandiswa zviri nani mumatope esimende.
Mune putty poda, HPMC inobata mabasa matatu ekukora, kuchengetedza mvura uye kuvaka. Usatora chikamu mune chero maitiro. Chikonzero chezviputi zvingave kuti mvura yakawandisa inoiswa mukati, kana kuti inogona kunge iri pasi pezasi haina kuoma, uye imwe nhanho inoputirwa pamusoro, uye iri nyore kupupa. Kuomesa mhedzisiro yeHPMC mune putty poda: cellulose inogona kukwizwa kuti imise, chengeta mhinduro yunifomu uye yakafanana, uye kuramba sagging. Mhedzisiro yekuchengetedza mvura yeHPMC muputty powder: ita kuti putty powder iome zvishoma nezvishoma, uye ubatsire ash calcium kuti iite pasi pekuita kwemvura. Kuvaka kweHPMC mu putty powder: cellulose ine lubricating effect, iyo inogona kuita putty powder kuva nekuvaka kwakanaka. HPMC haitore chikamu mune chero chemakemikari maitiro, asi inongotamba yebetsero.
Kurasikirwa kwehupfu kweputty powder kunonyanya kuenderana nehutano hwemadota e calcium, uye haina zvishoma zvekuita neHPMC. Iyo yakaderera calcium ye grey calcium uye chiyero chisina kukodzera cheCaO uye Ca (OH) 2 mu grey calcium inokonzera kurasikirwa kweupfu. Kana iine chekuita neHPMC, zvino kana kuchengetwa kwemvura kweHPMC kwakashata, kuchaitawo kuti hupfu huwe. Kuwedzera mvura kune putty powder uye kuiisa pamadziro ndeyekuita kwemakemikari, nokuti zvinhu zvitsva zvinoumbwa, uye putty powder pamadziro inobviswa kubva pamadziro. Pasi, pasi, ivhu kuva upfu, uye kushandiswa zvakare, hazvizoshandi, nokuti zvinhu zvitsva (calcium carbonate) zvakagadzirwa. Zvikamu zvikuru zveash calcium powder ndezvi: musanganiswa weCa (OH)2, CaO uye zvishoma zveCaCO3, CaO+H2O=Ca(OH)2—Ca(OH)2+CO2=CaCO3↓+H2O Ash calcium. iri mumvura nemhepo Pasi pekuita kwe CO2, calcium carbonate inogadzirwa, nepo HPMC inongochengetedza mvura, ichibatsira kuita zviri nani kweash calcium, uye haibatanidzi mune chero ipi zvayo pachayo.
Nguva yekutumira: Mar-14-2023