Hydroxypropyl Methylcellulose (HPMC)yog ib qho cellulose ether uas tsis yog ionic uas tsim los ntawm kev hloov kho tshuaj ntawm cov cellulose ntuj. Nws muaj cov yam ntxwv zoo heev uas ua rau tuab, khaws dej, tsim zaj duab xis, lo rau, ncua thiab ruaj khov, thiab siv dav hauv ntau qhov chaw xws li cov ntaub ntawv tsim kho, kev npaj tshuaj, tshuaj txhua hnub thiab kev ua zaub mov. Tam sim no nws yog ib qho ntawm cov khoom cellulose ether nrog cov ntawv thov loj tshaj plaws thiab kev ua tau zoo tshaj plaws.
1. Cov khoom yooj yim ntawm HPMC
1.1. Cov khoom siv tshuaj lom neeg
HPMC yog ib feem ntawm etherified cellulose. Nws cov qauv molecular muaj methoxy (-OCH₃) thiab hydroxypropoxy (-OCH₂CH(OH)CH₃) substituents, uas ua rau nws muaj kev yaj zoo heev thiab ruaj khov. Vim nws cov qauv nonionic, nws tsis cuam tshuam nrog cov ntsev hlau thiab tsis cuam tshuam los ntawm pH tus nqi, yog li tswj kev ua haujlwm ruaj khov hauv ntau yam kab ke.
1.2. Qhov tsos thiab daim ntawv
HPMC feem ntau yog hmoov dawb lossis dawb tawm, tsis muaj ntxhiab, tsis muaj saj, tsis muaj tshuaj lom, nrog cov khoom sib xws, yooj yim ntws, thiab yooj yim rau kev khaws cia thiab kev thauj mus los.
1.3. Kev yaj tau
HPMC yaj tau sai hauv dej txias. Ua ntej, nws raug yaj rau hauv dej kub, txias thiab tom qab ntawd yaj rau hauv cov kua pob tshab thiab khov. Nws cov kua muaj pob tshab thiab ruaj khov.
1.4. Cov yam ntxwv ntawm Thermogel
HPMC rhiab heev rau qhov kub thiab txias. Thaum qhov kub nce mus txog qhov gel, cov tshuaj yuav khov. Tom qab qhov kub poob qis, nws tuaj yeem rov qab ntws, uas yog lub hauv paus ntsiab lus tseem ceeb rau kev txhim kho kev tiv thaiv kev poob qis thiab txhim kho kev ua haujlwm hauv cov ntaub ntawv tsim kho.
2. Cov haujlwm tseem ceeb ntawm HPMC
2.1. Nws muaj kev ua tau zoo heev ntawm kev khaws dej
Qhov no yog lub luag haujlwm tseem ceeb tshaj plaws ntawm HPMC hauv cov ntaub ntawv tsim kho. Nws tuaj yeem xauv dej hauv cov tshuab ua los ntawm cement lossis gypsum, ncua kev ua kom dej noo, ua kom cov khoom noo tag, txhim kho lub zog thiab txo qhov hollowing thiab tawg.
2.2. Ua kom tuab thiab tswj cov khoom rheological
HPMC tuaj yeem ua rau kom muaj viscosity ntawm lub kaw lus, txhim kho qhov kev xav ntawm kev ua haujlwm tsim kho, ua rau cov slurry du dua, yooj yim dua rau txhuam lossis khawb, thiab tib lub sijhawm txhim kho lub peev xwm tiv thaiv kev sagging.
2.3. Txhim kho kev sib txuas
Hauv cov kab ke xws li cov nplaum pobzeb, cov neeg sawv cev grout, thiab cov neeg sawv cev tus kheej, HPMC tuaj yeem txhim kho qhov ntub thiab lo ntawm cov ntaub ntawv, thiab ua rau muaj kev ntseeg siab ntawm kev sib txuas.
2.4. Cov khoom ua zaj duab xis
HPMC tuaj yeem tsim ib zaj duab xis sib xws thiab pob tshab rau ntawm qhov chaw, uas muaj qee yam kev tiv thaiv, nplaum thiab yoog tau. Nws yog qhov tseem ceeb tshwj xeeb hauv kev npaj tshuaj thiab cov khoom siv tshuaj txhua hnub.
2.5. Kev ua kom lubrication thiab kev ua haujlwm conformal
Hauv cov txheej txheem extrusion thiab granulation, HPMC tuaj yeem txo qhov kev sib txhuam thiab txhim kho qhov zoo ntawm cov khoom.
3. Cov teb tseem ceeb ntawm HPMC
3.1. Cov ntaub ntawv siv hauv kev tsim kho (uas siv ntau tshaj plaws)
Cov nplaum rau pobzeb, cov nplaum rau pob zeb: Txhim kho kev khaws dej, lub sijhawm qhib, kev nplaum thiab kev ua haujlwm tau zoo.
Hmoov Putty: Txhim kho kev nthuav dav, kev nplua thiab kev tiv thaiv kev sagging.
Cov tshuaj khib (ua plastering, masonry, kho): Pab kom cov tshuaj khib sib npaug, viscosity tsim nyog, thiab kev tsim kho du.
Cov khoom siv gypsum: Txhim kho cov txheej txheem teeb tsa, txhim kho kev khaws dej thiab kev npliag, thiab txo qhov tawg.
Cov ntaub ntawv tus kheej leveling: Txhim kho kev tswj hwm ntws thiab kev ruaj khov ntawm kev ncua.
Lub kaw lus rwb thaiv tsev phab ntsa sab nraud (EPS/XPS): Ua kom lub zog thiab kev ruaj khov ntawm cov tshuaj nplaum thiab cov tshuaj nplaum plastering zoo dua.
Txawm hais tias qhov ntxiv ntawm HPMC hauv kev tsim kho yog tsawg (feem ntau yog 0.1% - 0.5%), nws ua lub luag haujlwm tseem ceeb thiab yog cov khoom siv tseem ceeb uas tsis tuaj yeem hloov pauv tau hauv feem ntau cov mortars qhuav.
3.2. Kev kho mob
Tom qab ncav cuag tus qauv qib tshuaj, HPMC tuaj yeem siv tau ua:
Cov khoom siv khi ntawm cov ntsiav tshuaj
Cov ntaub ntawv tswj kev tso tawm, cov ntaub ntawv txheej
Cov ntaub ntawv raw rau cov plhaub capsule pob tshab (tsob nroj capsules)
Cov tshuaj ua kom qhov muag tuab, gel matrix
Nws muaj kev nyab xeeb heev, tsis muaj tshuaj lom thiab lwj tau, thiab yog ib qho tshuaj zoo heev ntawm cov khoom siv ntuj thiab cov khoom siv hluavtaws.
3.3. Cov tshuaj siv niaj hnub thiab lwm yam kev siv hauv kev lag luam
Cov tshuaj ntxuav tes, tshuaj ntxuav tes thiab tshuaj ntxuav lub cev: Lawv ua lub luag haujlwm hauv kev ua kom tuab, ncua thiab ruaj khov.
Cov txheej thiab cov kua mem: Txhim kho kev sib kis, rheology thiab kev ua yeeb yaj kiab.
Xim Latex: Ua kom cov khoom tuab dua, khaws dej thiab xav tias zoo li kev tsim kho.
Kev ua zaub mov (qib zaub mov xav tau): Ua tus neeg sawv cev emulsifying stabilizer, thickener thiab zaj duab xis-tsim tus neeg sawv cev.
Kev lag luam PVC: Ua ib qho dispersant hauv polymerization reactions.
4. Cov ntsiab lus tseem ceeb rau kev xaiv HPMC
4.1. Kev xaiv cov qib viscosity
Cov teebmeem ntawm HPMC nrog cov viscosities sib txawv yog qhov sib txawv heev:
Cov viscosity qis (400-15,000 CPS): Haum rau kev ua kom nws tus kheej, hmoov roj hmab, polystyrene hmoov thiab lwm yam tshuab.
Qhov nruab nrab viscosity (20,000-50,000 CPS): Feem ntau siv rau hauv cov hmoov putty thiab plastering mortar.
Cov viscosity siab (60,000-200,000 CPS): Haum rau cov nplaum pobzeb thiab cov tshuab uas xav tau kev khaws dej ntau.
4.2. Qib ntawm kev hloov pauv phim cov qauv
Qhov degree ntawm kev hloov pauv cuam tshuam rau qhov nrawm ntawm kev yaj, kev khaws dej thiab kev ua haujlwm tiv thaiv kev plam. Yuav tsum xaiv cov qauv sib txawv rau cov ntawv thov sib txawv.
Tus nqi yaj (hom yaj sai/hom qeeb)
Hom uas yaj sai sai no yog tsim rau cov tshuab uas muaj cov txheej txheem sib tov me me xws li putty thiab coatings.
Hom qeeb no yog tsim rau cov tshuab sib tov muaj zog xws li cov mortar thiab cov nplaum pobzeb
5. Kev Khaws Cia thiab Kev Ruaj Ntseg
HPMCyog ib yam khoom hmoov thiab yuav tsum tau khaws cia rau qhov chaw txias thiab qhuav kom tsis txhob muaj dej noo thiab ua pob. Nws tsis muaj tshuaj lom, tsis muaj ntxhiab thiab ruaj khov heev. Thaum siv, tsuas yog yuav tsum tau sau tseg kev tiv thaiv plua plav xwb.
Hydroxypropyl methylcellulose (HPMC), nrog nws cov khoom zoo heev uas khaws dej tau zoo, ua kom tuab, ua zaj duab xis thiab ruaj khov, ua lub luag haujlwm tseem ceeb hauv ntau qhov chaw xws li kev tsim kho, tshuaj, tshuaj lom neeg txhua hnub, khoom noj thiab kev ua lag luam. Txawm hais tias qhov ntxiv tsis siab, nws yog ib qho tseem ceeb hauv kev txhim kho kev ua tau zoo hauv cov ntaub ntawv tsim kho niaj hnub thiab cov mis khoom txhua hnub.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-11-2025