Hydroxypropyl Methylcellulose Siv Hauv Phab Ntsa Putty Thiab Skim Coat
Hydroxypropyl Methylcellulose (HPMC) yog ib qho ntawm cov khoom siv tseem ceeb tshaj plaws uas siv rau hauv cov khoom siv putty thiab skim coat. Ua ib qho cellulose ether ua tau zoo, nws muab kev khaws cia dej, ua kom tuab, txhim kho kev ua haujlwm, thiab tswj qhov chaw tiav. Nkag siab txog qhov tseem ceeb hydroxypropyl methylcellulose siv rau hauv phab ntsa putty thiab skim txheej pab cov chaw tsim khoom thiab cov neeg tsim cov qauv tsim cov khoom siv tiav du, ruaj khov dua, thiab yooj yim dua rau kev siv.
Phau ntawv qhia no piav qhia txog HPMC ua haujlwm li cas hauv cov txheej txheem putty, nws cov txiaj ntsig kev ua tau zoo li cas, yuav ua li cas xaiv qib viscosity kom raug, thiab yuav ua li cas kom zoo dua cov koob tshuaj kom tau txiaj ntsig zoo ib yam.
Cov Khoom Siv Phab Ntsa Putty thiab Skim Coat Yog Dab Tsi?
Cov nplaum nplaum phab ntsa thiab cov txheej skim yog cov txheej nyias nyias uas siv rau saum cov plaster lossis cov pob zeb ua kom du thiab npaj pleev xim. Cov ntaub ntawv no feem ntau yog ua raws li:
- Cov khoom siv sib txuas ntawm cov cement lossis gypsum
- Cov khoom siv zoo (calcium carbonate, talc, thiab lwm yam)
- Cov khoom hloov kho polymer
- Cov khoom siv ntxiv xws li HPMC
Vim tias cov txheej no nyias thiab raug nthuav tawm, kev tswj cov dej noo thiab kev siv tus cwj pwm yog qhov tseem ceeb - uas yog qhov uas hydroxypropyl methylcellulose ua lub luag haujlwm tseem ceeb.
Yuav ua li cas HPMC Ua Haujlwm hauv Putty thiab Skim Coat Systems
Thaum sib xyaw nrog dej, HPMC hydrates thiab tsim cov tshuaj ruaj khov, viscous uas hloov pauv qhov rheology ntawm cov sib tov putty. Qhov no tsim cov qauv nplaum tswj tau uas txhim kho kev tuav thiab kev kho tus cwj pwm.
Lub luag haujlwm tseem ceeb muaj xws li:
- Tus neeg sawv cev khaws dej
- Cov khoom siv thickener thiab rheology controller
- Kev txhim kho kev ua haujlwm
- Tus neeg sawv cev tiv thaiv kab mob
- Cov tshuaj txhim kho qhov chaw tiav
- Kev txhawb nqa txo qhov tawg
Cov Hydroxypropyl Methylcellulose Siv Hauv Phab Ntsa Putty
1. Muaj zog khaws dej
Cov tshuaj pleev phab ntsa yog siv rau hauv cov txheej nyias heev, ua rau nws yooj yim rau kev poob dej sai. HPMC txhim kho qhov khaws cia dej thiab ua kom muaj dej noo zoo.
- Tiv thaiv kom qhuav ua ntej lub sijhawm
- Txhim kho kev sib txuas rau substrate
- Txo cov hmoov av ntawm qhov chaw
- Txhawb kev loj hlob ntawm lub zog
2. Kev Ua Haujlwm Scraping thiab Troweling Zoo Dua
Qhov kev xav ntawm kev siv yog qhov tseem ceeb ntawm qhov zoo ntawm cov khoom siv putty. Ib qho ntawm cov khoom siv hydroxypropyl methylcellulose uas muaj nqis tshaj plaws yog kev txhim kho qhov du thiab qhov zoo ntawm cov hniav.
- Kev txav riam du dua
- Txo qhov rub
- Ntau txheej txheej tuab dua
- Kev tswj ntug zoo dua
3. Kev Tiv Thaiv Sag Ntawm Cov Nto Ntsug
Cov tshuaj putty thiab skim coat feem ntau siv rau ntawm phab ntsa ntsug thiab qab nthab. Cov viscosity HPMC kom zoo pab tswj lub cev nplaum thiab txo qhov sagging.
- Tuav ntsug zoo dua
- Cov kab tiav huv dua
- Txo kev ua haujlwm dua tshiab
4. Kev Txhim Kho Qhov Chaw
HPMC pab tswj cov qauv nplaum thiab cov khoom me me, pab ua rau cov nplaim du thiab du.
- Txhim kho qib
- Txo cov qhov me me
- Kev lees txais xim zoo dua
- Zoo li qub dua
Kev Txhim Kho Kev Ua Haujlwm Skim Coat los ntawm HPMC
Hauv cov qauv skim coat, hydroxypropyl methylcellulose txhim kho ob qho kev siv thiab kev kho tus cwj pwm.
| Thaj Chaw Ua Tau Zoo | Cov nyhuv ntawm HPMC |
|---|---|
| Kev kis tau yooj yim | Smoother thiab ntau dua uniform |
| Lub sijhawm qhib | Qhov rai ua haujlwm ntev dua |
| Kev sib koom siab | Kev ruaj khov sab hauv siab dua |
| Kev tawg | Txo kev pheej hmoo |
| Qhov zoo ntawm kev ua tiav | Cov qauv nto zoo dua |
Cov Tshuaj HPMC Pom Zoo hauv Putty thiab Skim Coat
Kev siv tshuaj nyob ntawm hom binder, qhov zoo ntawm cov filler, thiab qhov sib xws ntawm lub hom phiaj.
| Daim Ntawv Thov | Cov Tshuaj Li Cas |
|---|---|
| Cov cement phab ntsa putty | 0.30% – 0.50% |
| Sab hauv skim coat | 0.25% - 0.45% |
| Gypsum skim txheej | 0.20% - 0.35% |
Kev hloov kho thaj teb raug pom zoo raws li huab cua thiab kev nqus dej ntawm cov substrate.
Daim Ntawv Qhia Xaiv Qib Viscosity
- Nruab nrab viscosity: zoo dua ntws thiab leveling
- Siab viscosity: muaj zog dua sag tsis kam
- Cov viscosity siab heev: lub cev siab tshaj plaws rau cov khaubncaws sab nraud povtseg tuab
Feem ntau cov viscosity siab dua yog qhov zoo dua rau cov putty phab ntsa, thaum cov skim coat yuav siv cov qib nruab nrab mus rau qib siab nyob ntawm seb koj xav li cas.
Cov Kev Xyaum Zoo Tshaj Plaws ntawm Kev Tsim Qauv
- Qhuav sib xyaw HPMC sib npaug nrog cov khoom sau
- Tsis txhob muab dej pov ncaj qha rau ntawm cov hmoov av
- Sib koom tes nrog RDP rau kev txhim kho kev sib txuas
- Sim qhov kev xav khawb thiab lub sijhawm qhib ua ke
- Kho raws li qhov loj ntawm cov khoom me me ntawm calcium carbonate
Cov Lus Nug Feem Ntau: HPMC Siv Hauv Phab Ntsa Putty thiab Skim Coat
Vim li cas HPMC thiaj ntxiv rau hauv phab ntsa putty?
HPMC txhim kho kev khaws cia dej, kev txhuam du, kev tiv thaiv sag, thiab qhov zoo ntawm qhov chaw.
HPMC puas cuam tshuam rau qhov du ntawm putty?
Yog. Kev xaiv qib kom zoo yuav pab tsim kom muaj qhov chaw zoo nkauj thiab sib npaug zoo dua.
Yuav ua li cas yog tias putty tsis muaj HPMC?
Nws yuav qhuav sai dhau, tawg yooj yim dua, thiab ua haujlwm tsis tau zoo thaum lub sijhawm siv.
Xaus lus
Hydroxypropyl methylcellulose yog ib qho khoom siv tseem ceeb hauv kev ua haujlwm ntawm phab ntsa putty thiab skim coat systems. Nws cov teebmeem ntau yam - suav nrog kev khaws dej, kev tswj rheology, kev tiv thaiv sag, thiab kev txhim kho tiav - ua rau nws tseem ceeb rau kev tsim cov ntaub ntawv tiav zoo. Nrog kev xaiv viscosity thiab kev tswj cov tshuaj kom raug, HPMC ua rau cov qauv ruaj khov dua thiab cov txiaj ntsig zoo dua ntawm kev siv.