Hydroxypropyl Methylcellulose HPMC yog dab tsi?

Hydroxypropyl Methylcellulose HPMC, tseem hu ua Cellulose ether, yog ib qho hluavtaws, dej-soluble polymer uas tau los ntawm cellulose. Nws yog tsim los ntawm kev hloov kho tej yam ntuj tso cellulose, uas yog lub hauv paus txheej txheem ntawm cov nroj tsuag, los ntawm ib tug series ntawm tshuaj.

Muaj qib hydroxypropyl methylcellulose yog qhov txawv ntawm viscosity. Feem ntau siv yog cov qib hauv qab no (raws li viscosity).

Tsawg viscosity: 400 feem ntau yog siv rau tus kheej-leveling mortar, tab sis nws feem ntau yog imported. Yog vim li cas: tsis tshua muaj viscosity, txawm hais tias cov dej tuav tsis zoo, tab sis lub leveling yog zoo, lub mortar ceev yog siab.

Nruab nrab thiab siab viscosity: 20000-70000 yog tsuas yog siv rau cov pobzeb nplaum, tus neeg sawv cev caulking, tawg-resistant mortar, thermal rwb thaiv tsev sib txuas mortar, thiab lwm yam. Yog vim li cas: zoo workability, dej tsawg, thiab siab mortar ntom.

Dab tsi yog qhov tseem ceeb ntawm kev siv hydroxypropyl methylcellulose (HPMC)?

HPMCyog dav siv nyob rau hauv cov ntaub ntawv siv, txheej, hluavtaws resins, ceramics, tshuaj, khoom noj khoom haus, textile, ua liaj ua teb, tshuaj pleev ib ce, luam yeeb thiab lwm yam lag luam. HPMC tuaj yeem muab faib ua: tsev, khoom noj thiab tshuaj. Tam sim no, feem ntau ntawm cov tsev tsim khoom hauv tsev yog cov qib architectural. Hauv qib kev tsim kho, tus nqi ntawm cov hmoov putty yog loj heev, li ntawm 90% yog siv los ua cov hmoov putty, thiab cov seem yog siv cov cement mortar thiab kua nplaum.

Muaj ntau hom hydroxypropyl methylcellulose (HPMC). Qhov txawv ntawm lawv siv yog dab tsi?

HPMCtuaj yeem muab faib ua instant-dissolved thiab kub-dissolved, ceev-dissolving khoom. Thaum nws tawg sai sai hauv dej txias, nws ploj mus rau hauv dej. Lub sijhawm no, cov kua dej tsis muaj viscosity vim tias HPMC tsuas yog tawg mus rau hauv dej thiab tsis muaj kev sib cais tiag tiag. Txog 2 feeb, cov viscosity ntawm cov kua maj mam loj dua, tsim cov pob tshab viscous colloid. Cov khoom kub-melt hom, nyob rau hauv cov ntaub ntawv ntawm dej txias, yuav sai sai dispersed nyob rau hauv dej kub thiab ploj mus rau hauv dej kub. Thaum qhov kub thiab txias poob rau qee qhov kub, qhov viscosity maj mam tshwm kom txog thaum lub pob tshab viscous colloid tsim. Hom kub-dissolved tsuas yog siv rau hauv cov hmoov putty thiab mortar. Hauv cov kua nplaum thiab pleev xim, yuav muaj qhov tshwm sim ntawm clumping, uas tsis tuaj yeem siv. Nws yog muaj nyob rau hauv ntau yam kev siv, nyob rau hauv putty hmoov thiab mortar, nrog rau cov kua nplaum thiab coatings. Tsis muaj contraindications.

Yuav ua li cas yog cov txheej txheem dissolution ntawm hydroxypropyl methylcellulose (HPMC)?

Txoj kev sib cais dej kub: Txij li HPMC tsis yaj hauv dej kub, thawj HPMC tuaj yeem sib cais hauv cov dej kub thiab tom qab ntawd yaj sai sai thaum lub caij txias. Ob txoj hauv kev tau piav qhia raws li hauv qab no: 1), muab tso rau hauv lub thawv Nkag mus rau qhov xav tau ntawm cov dej kub thiab cua sov kom txog li 70 ° C. Hydroxypropyl methylcellulose tau maj mam ntxiv nrog qeeb nplawm, thiab HPMC ntab saum npoo dej, thiab tom qab ntawd cov slurry tau maj mam tsim, thiab cov slurry tau txias nrog nplawm. 2) Ntxiv 1/3 lossis 2/3 ntawm cov dej xav tau rau hauv lub nkoj thiab cua sov rau 70 ° C, dispersing HPMC raws li 1) los npaj cov dej kub slurry; tom qab ntawd ntxiv cov dej txias ntxiv rau cov dej kub Hauv cov slurry, qhov sib tov yog txias tom qab nplawm. Txoj kev sib tov hmoov: HPMC hmoov yog tov nrog ib tug loj npaum li cas ntawm lwm cov hmoov, tov kom huv si nrog ib tug blender, thiab ces yaj nrog dej. Lub sijhawm no, HPMC tuaj yeem yaj yam tsis muaj kev sib xyaw ua ke, vim tias txhua lub kaum me me tsuas muaj HPMC me me xwb. Cov hmoov yuav yaj tam sim ntawd thaum sib cuag nrog dej. - Txoj kev no yog siv los ntawm putty hmoov thiab mortar manufacturers. Hydroxypropyl methylcellulose (HPMC) yog siv los ua cov thickener thiab dej tuav tus neeg sawv cev hauv cov tshuaj khib nyiab.

Yuav ua li cas txiav txim qhov zoo ntawm hydroxypropyl methylcellulose (HPMC) yooj yim thiab intuitively?

(1) Dawb: Txawm hais tias dawb tsis tuaj yeem txiav txim siab seb HPMC puas siv tau yooj yim, thiab yog tias nws ntxiv rau lub teeb ci thaum lub sijhawm tsim khoom, nws yuav cuam tshuam rau nws qhov zoo. Txawm li cas los xij, cov khoom zoo feem ntau yog dawb. (2) Fineness: Qhov zoo ntawm HPMC feem ntau muaj 80 mesh thiab 100 mesh, thiab 120 mesh tsawg dua. Qhov finer qhov fineness, qhov zoo nyob rau hauv dav dav. (3) Transmittance: Muab hydroxypropyl methylcellulose (HPMC) rau hauv dej los tsim cov pob tshab colloid, thiab saib nws cov pob tshab. Qhov zoo dua qhov transmittance, qhov tsawg insoluble teeb meem. . Vertical reactor muaj qhov zoo permeability, thiab kab rov tav reactor yog qhov phem dua, tab sis nws tsis tau txhais hais tias qhov zoo ntawm lub reactor ntsug yog zoo dua li ntawm lub hwj. Qhov zoo ntawm cov khoom yog txiav txim los ntawm ntau yam. (4) Lub ntiajteb txawj nqus tshwj xeeb: qhov siab dua qhov tshwj xeeb, qhov hnyav dua. Qhov piv yog loj, feem ntau vim hais tias cov ntsiab lus ntawm hydroxypropyl pawg yog siab, thiab cov ntsiab lus ntawm hydroxypropyl pawg yog siab, cov dej tuav tau zoo dua.

Tus nqi ntawm hydroxypropyl methylcellulose (HPMC) hauv putty hmoov yog dab tsi?

Tus nqi ntawm kev tsim kho qib HPMCsiv nyob rau hauv kev siv tswv yim sib txawv nrog kev nyab xeeb, kub, lub zos tshauv calcium zoo, mis hmoov putty thiab "zoo xav tau los ntawm cov neeg muas zaub". Nyob rau hauv dav dav, nruab nrab ntawm 4 kg thiab 5 kg. Piv txwv li: qhov chaw txias putty hmoov, feem ntau muab 5 kg; Qhov kub yog feem ntau 5 kg nyob rau lub caij ntuj sov thiab 4.5 kg nyob rau lub caij ntuj no.

Dab tsi yog qhov viscosity ntawm hydroxypropyl methylcellulose (HPMC)?

Phab ntsa putty hmoov feem ntau yog 100,000, thiab cov mortar qhuav yuav tsum siab dua. Yuav tsum siv 150,000. Tsis tas li ntawd, lub luag haujlwm tseem ceeb tshaj plaws ntawm HPMC yog khaws cov dej, ua raws li cov thickening. Nyob rau hauv cov hmoov putty, tsuav yog cov dej tuav tau zoo, cov viscosity qis dua (70,000-80,000), kuj tseem ua tau. Ntawm chav kawm, viscosity loj dua, cov txheeb ze dej tuav tau zoo dua. Thaum lub viscosity siab tshaj 100,000, cov nyhuv ntawm viscosity ntawm cov dej tuav tsis loj heev.

Dab tsi yog cov cim qhia tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC)?

Hydroxypropyl cov ntsiab lus thiab viscosity, cov neeg siv feem ntau txhawj xeeb txog ob qhov ntsuas no. Yog tias cov ntsiab lus hydroxypropyl siab, cov dej tuav feem ntau zoo dua. Viscosity, dej tuav, txheeb ze (tsis yog qhov tseeb), thiab siab viscosity, zoo dua hauv cov cement mortar.

Dab tsi yog cov ntaub ntawv tseem ceeb rau hydroxypropyl methylcellulose (HPMC)?

Cov ntaub ntawv tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC): paj rwb refined, methyl chloride, propylene oxide, lwm yam raw khoom, xws li caustic soda, acid, toluene, isopropanol.

Lub luag haujlwm tseem ceeb ntawm HPMC yog dab tsi hauv kev siv cov hmoov putty?

HPMC plays lub luag hauj lwm ntawm thickening, dej tuav thiab kev tsim kho nyob rau hauv cov hmoov putty. Thickening: Cellulose tuaj yeem ua kom tuab kom tshem tawm, ua kom cov tshuaj sib npaug sib npaug, thiab tiv taus sag. Kev tuav dej: Cov hmoov putty yog qhuav maj mam, thiab cov auxiliary tshauv calcium reacts nyob rau hauv qhov kev txiav txim ntawm dej. Kev tsim kho: Cellulose muaj cov nyhuv lubricating, uas tuaj yeem ua rau cov hmoov putty muaj kev ua haujlwm zoo. HPMC tsis koom nrog cov tshuaj tiv thaiv thiab tsuas yog ua lub luag haujlwm txhawb nqa. Putty hmoov nrog dej, ntawm phab ntsa, yog cov tshuaj tiv thaiv. Vim yog tsim cov tshuaj tshiab, cov hmoov putty rau ntawm phab ntsa raug tshem tawm ntawm phab ntsa, hauv av rau hauv cov hmoov, thiab rov qab siv dua, nws yuav tsis ua haujlwm, vim tias muaj cov tshuaj tshiab tau tsim (calcium carbonate). ). Cov khoom tseem ceeb ntawm cov hmoov tshauv calcium hmoov yog: Ca (OH) 2, sib tov ntawm CaO thiab ib qho me me ntawm CaCO3, CaO + H2O = Ca (OH) 2-Ca (OH) 2 + CO2 = CaCO3 + H2O tshauv calcium hauv dej thiab huab cua Nyob rau hauv qhov kev txiav txim ntawm CO2, calcium carbonate yog tsim, thiab HPMC tsuas yog khaws cov dej, pab cov tshuaj tiv thaiv zoo ntawm cov hmoov tshauv calcium, thiab tsis koom nrog cov tshuaj tiv thaiv nws tus kheej. 

HPMC yog non-ionic cellulose ether, yog li dab tsi yog non-ion?

Feem ntau hais lus, non-ion yog ib yam khoom uas tsis nyob hauv dej thiab tsis yog ionized. Ionization yog hais txog cov txheej txheem uas ib qho electrolyte dissociated rau hauv ib qho kev txav dawb ion nyob rau hauv ib qho hnyav xws li dej los yog cawv. Piv txwv li, ntsev uas noj txhua hnub, sodium chloride (NaCl), yog ionized los tsim cov dawb-tsav sodium ions (Na +) zoo them thiab chloride (Cl) tsis zoo them. Hais tias yog, HPMC muab tso rau hauv dej thiab tsis dissociate rau ions them, tab sis muaj nyob rau hauv daim ntawv ntawm molecules.

Lub gel kub ntawm hydroxypropyl methylcellulose yog dab tsi?

Lub gel kub ntawm HPMC muaj feem xyuam rau nws cov ntsiab lus methoxy. Qhov qis dua cov ntsiab lus methoxy, qhov siab dua qhov gel.

Cov hmoov ntawm putty hmoov puas muaj kev sib raug zoo nrog HPMC?

Cov hmoov ntawm putty hmoov yog feem ntau hais txog qhov zoo ntawm grey calcium, thiab muaj me ntsis ua rau HPMC. Cov ntsiab lus calcium tsawg ntawm cov hmoov tshauv calcium thiab qhov tsis tsim nyog ntawm CaO thiab Ca (OH) 2 hauv cov hmoov tshauv calcium yuav ua rau hmoov poob. Yog hais tias nws muaj feem xyuam rau HPMC, ces yog tias cov dej khaws cia ntawm HPMC tsis zoo, nws kuj yuav ua rau hmoov poob.

Dab tsi yog qhov txawv ntawm cov dej txias instant hom thiab cov kub soluble hom hydroxypropyl methylcellulose nyob rau hauv cov txheej txheem ntau lawm? HPMC dej txias instant hom yog nto kho nrog glyoxal, thiab nws yog sai dispersed nyob rau hauv dej txias, tab sis nws tsis yog yaj. Thaum lub viscosity nce, nws yog yaj. Daim ntawv kub soluble tsis nto kho nrog glyoxal. Thaum tus nqi ntawm glyoxal loj, qhov tawg sai sai, tab sis cov viscosity qeeb. 

Dab tsi yog qhov tsw ntawm hydroxypropyl methylcellulose (HPMC)?

HPMC tsim los ntawm txoj kev hnyav siv toluene thiab isopropyl cawv ua cov kuab tshuaj. Yog tias ntxuav tsis zoo, yuav muaj qee qhov seem saj.

Yuav ua li cas xaiv txoj cai hydroxypropyl methylcellulose (HPMC) rau ntau lub hom phiaj?

Daim ntawv thov ntawm cov hmoov putty: qhov yuav tsum tau qis dua, viscosity yog 100,000, nws yog ok, qhov tseem ceeb yog ua kom cov dej zoo dua. Daim ntawv thov ntawm mortar: siab xav tau, siab viscosity, 150,000 zoo dua. Daim ntawv thov kua nplaum: Xav tau cov khoom lag luam tam sim, siab viscosity.

Lub npe ntawm hydroxypropyl methylcellulose yog dab tsi?

Hydroxypropyl methylcellulose, HydroxypropylMethylCellulose Abbreviation: HPMC los yog MHPC alias: hypromellose; cellulose hydroxypropyl methyl ether; Hypromellose, Cellulose ether, 2-hydroxypropylmethyl Cellulos ether. Cellulose hydroxypropyl methyl ether, Hyprolose.

Daim ntawv thov ntawm HPMC nyob rau hauv putty hmoov, dab tsi yog ua npuas ncauj nyob rau hauv putty hmoov?

HPMC plays lub luag hauj lwm ntawm thickening, dej tuav thiab kev tsim kho nyob rau hauv cov hmoov putty. Tsis txhob koom nrog cov tshuaj tiv thaiv. Yog vim li cas rau npuas: 1, dej ntau dhau. 2, txheej hauv qab tsis qhuav, tsuas yog khawb ib txheej rau saum, nws kuj yog ib qho yooj yim ua npuas ncauj.　

Lub puab thiab sab nrauv phab ntsa putty hmoov mis?

Sab hauv phab ntsa putty hmoov: hnyav calcium 800KG grey calcium 150KG (cov hmoov txhuv nplej siab ether, ntshiab ntsuab, penmine av, citric acid, polyacrylamide, thiab lwm yam. tuaj yeem xaiv kom zoo ntxiv)

Sab nrauv phab ntsa putty hmoov: cement 350KG, hnyav calcium 500KG, quartz xuab zeb 150KG, latex hmoov 8-12KG, cellulose ether 3KG, starch ether 0.5KG, ntoo fiber 2KG

Qhov txawv ntawm HPMC thiab MC yog dab tsi?

MC yog methyl cellulose. Tom qab cov paj rwb refined yog kho nrog alkali, chloromethane yog siv los ua ib tug etherifying tus neeg sawv cev, thiab ib tug series ntawm cov tshuaj tiv thaiv los npaj cellulose ether. Cov degree ntawm kev hloov pauv feem ntau yog 1.6 txog 2.0, thiab qib ntawm kev hloov pauv txawv nyob ntawm qhov solubility. Nws belongs rau nonionic cellulose ether.

(1) Cov dej tuav ntawm methyl cellulose nyob ntawm qhov sib ntxiv, viscosity, particle fineness thiab dissolution tus nqi. Feem ntau, qhov sib ntxiv yog loj, qhov fineness yog me me, thiab cov viscosity loj, thiab cov dej tuav tus nqi siab. Cov nyiaj ntxiv muaj qhov cuam tshuam loj tshaj plaws ntawm cov dej tuav tus nqi, thiab qib viscosity tsis yog proportional rau cov dej tuav tus nqi. Tus nqi ntawm dissolution feem ntau yog nyob ntawm qhov degree ntawm kev hloov kho deg ntawm cellulose hais thiab fineness ntawm hais. Ntawm cov cellulose ethers saum toj no, methylcellulose thiab hydroxypropylmethylcellulose muaj cov dej khaws cia siab.

(2) Methylcellulose yog soluble hauv dej txias, thiab nws nyuaj rau yaj hauv dej kub. Cov tshuaj aqueous yog ruaj khov nyob rau hauv thaj tsam ntawm pH = 3 ~ 12. Nws muaj kev sib raug zoo nrog cov hmoov txhuv nplej siab, cov pos hniav thiab ntau lwm cov surfactants. Thaum qhov kub nce mus txog qhov kub thiab txias, qhov tshwm sim gelation tshwm sim.

(3) Kev hloov ntawm qhov kub thiab txias yuav cuam tshuam rau cov dej tuav tus nqi ntawm methyl cellulose. Feem ntau, qhov kub thiab txias dua, qhov dej khaws cia tsis zoo. Yog hais tias qhov kub ntawm lub mortar ntau tshaj 40 ° C, cov dej tuav ntawm methyl cellulose yuav deteriorated loj, uas cuam tshuam rau kev ua hauj lwm ntawm mortar.

(4) Methyl cellulose muaj qhov cuam tshuam loj rau kev ua haujlwm thiab adhesion ntawm mortar. "Adhesiveness" ntawm no yog hais txog lub zog nplaum ntawm tus neeg ua haujlwm cov cuab yeej siv thiab cov phab ntsa substrate, uas yog, shear resistance ntawm lub mortar. Lub adhesion yog loj, shear resistance ntawm lub mortar yog loj, lub zog yuav tsum tau los ntawm tus neeg ua hauj lwm thaum lub sij hawm siv kuj loj, thiab lub workability ntawm lub mortar yog tsis zoo.

Methylcellulose adhesion yog nruab nrab hauv cellulose ether cov khoom. HPMC yog hydroxypropylmethylcellulose, uas yog ib tug nonionic cellulose tov ether npaj los ntawm ib tug series ntawm cov tshuaj tiv thaiv siv acetal oxide thiab methyl chloride ua ib tug etherifying tus neeg saib xyuas tom qab alkalization ntawm refined paj rwb. Qhov kev hloov pauv feem ntau yog 1.2 txog 2.0. Nws qhov xwm txheej txawv nyob ntawm qhov piv ntawm cov ntsiab lus methoxyl thiab hydroxypropyl cov ntsiab lus.

(1) Hydroxypropyl methylcellulose yooj yim soluble hauv dej txias, thiab nws yuav nyuaj rau yaj hauv dej kub. Txawm li cas los xij, nws qhov kub thiab txias hauv dej kub yog siab dua li ntawm methyl cellulose. Kev sib cais hauv dej txias kuj zoo dua li methyl cellulose. -

(2) Lub viscosity ntawm hydroxypropylmethylcellulose muaj feem xyuam rau qhov hnyav molecular ntawm nws, thiab cov viscosity siab thaum lub luj molecular loj. Qhov kub kuj cuam tshuam rau nws cov viscosity, qhov kub thiab txias nce, thiab viscosity txo. Txawm li cas los xij, nws cov viscosity muaj qhov kub qis dua li methyl cellulose. Nws cov tshuaj yog ruaj khov ntawm chav tsev kub.

(3) Hydroxypropyl methylcellulose ruaj khov rau cov kua qaub thiab cov hauv paus, thiab nws cov tshuaj aqueous ruaj khov nyob rau hauv thaj tsam ntawm pH = 2 ~ 12. Caustic dej qab zib thiab txiv qaub dej tsis muaj txiaj ntsig ntau rau lawv cov khoom, tab sis alkali ua kom lawv cov kuab lom thiab ua kom muaj viscosity. Hydroxypropyl methylcellulose muaj kev ruaj ntseg rau cov ntsev dav dav, tab sis thaum lub concentration ntawm cov ntsev ntsev yog siab, lub viscosity ntawm hydroxypropyl methylcellulose tov yuav nce.

(4) Cov dej tuav ntawm hydroxypropyl methylcellulose nyob ntawm qhov sib ntxiv, viscosity, thiab lwm yam, thiab cov dej tuav tus nqi nyob rau hauv tib tus nqi yog siab dua li ntawm methylcellulose.

(5) Hydroxypropyl methylcellulose tuaj yeem tov nrog cov dej-soluble polymer compound los tsim ib qho kev sib xws, ntau dua viscosity tov. Xws li polyvinyl cawv, starch ether, zaub pos hniav thiab lwm yam.

(6) Hydroxypropyl methylcellulose muaj ntau dua adhesion rau mortar tshaj methyl cellulose.

(7) Hydroxypropyl methylcellulose muaj kev ua haujlwm zoo dua qub dua li methylcellulose, thiab nws cov kev daws teeb meem tsis tshua muaj peev xwm degraded dua li methylcellulose.

HPMC viscosity thiab kub kev sib raug zoo, dab tsi yuav tsum tau them sai sai rau hauv kev siv tswv yim?

Lub viscosity ntawm HPMC yog inversely proportional rau kub, uas yog, lub viscosity nce nrog txo kub. Lub viscosity ntawm cov khoom peb feem ntau xa mus yog qhov tshwm sim ntawm kev sim nws 2% aqueous tov ntawm qhov kub ntawm 20 degrees Celsius. Nyob rau hauv cov ntaub ntawv siv, nyob rau hauv cov cheeb tsam uas muaj kub sib txawv ntawm lub caij ntuj sov thiab lub caij ntuj no, nws yuav tsum tau muab sau tseg tias nws yog pom zoo kom siv ib tug kuj tsis tshua muaj viscosity nyob rau hauv lub caij ntuj no, uas yog ntau conducive rau kev tsim kho. Txwv tsis pub, thaum qhov kub thiab txias qis, viscosity ntawm cellulose yuav nce, thiab thaum nws khawb, txhais tes yuav hnyav. Nruab nrab viscosity: 75000-100000 Feem ntau yog siv rau putty Vim li cas: dej tuav siab viscosity: 150000-200000 yog tsuas yog siv rau polystyrene granule rwb thaiv tsev mortar hmoov thiab vitrified microbead rwb thaiv tsev mortar. Yog vim li cas: siab viscosity, mortar tsis yooj yim rau poob Yog, sag, txhim kho kev tsim kho. Tab sis feem ntau, qhov siab dua qhov viscosity, cov dej tuav tau zoo dua, ntau cov nroj tsuag qhuav qhuav xav txog tus nqi, hloov qhov nruab nrab thiab qis viscosity cellulose nrog nruab nrab viscosity cellulose (75000-100000). (20000-40000) txo tus nqi ntxiv.