HPMC (Hydroxypropyl Methyl Cellulose) thiab HEMC (Hydroxy Ethyl Methyl Cellulose) yog cellulose ethers uas feem ntau siv hauv cov khoom siv vim lawv cov khoom tshwj xeeb. Lawv yog cov dej-soluble polymers muab tau los ntawm cellulose, ib tug natural polymer pom nyob rau hauv cov nroj tsuag cell phab ntsa. HPMC thiab HEMC yog siv los ua cov khoom ntxiv hauv ntau yam khoom siv los txhim kho lawv cov khoom thiab txhim kho kev ua haujlwm.
Cov hauv qab no yog qee qhov kev siv ntawm HPMC thiab HEMC hauv cov khoom siv:
Pobzeb Adhesives: HPMC thiab HEMC feem ntau ntxiv rau cov nplais nplaum los txhim kho kev ua haujlwm thiab kev sib raug zoo. Cov polymers no ua cov thickeners, muab lub sijhawm qhib zoo dua (ntev npaum li cas cov nplaum tseem siv tau) thiab txo cov pobzeb sagging. Lawv kuj txhim kho cov nplaum nplaum rau cov substrates sib txawv.
Cementitious Mortars: HPMC thiab HEMC yog siv rau hauv cov cementitious mortars xws li plasters, plasters thiab sab nrauv rwb thaiv tsev tiav tshuab (EIFS). Cov polymers no txhim kho kev ua haujlwm ntawm cov mortar, ua kom yooj yim rau kev sib kis thiab siv. Lawv kuj txhim kho cohesion, txo cov dej nqus thiab txhim kho cov adhesion ntawm mortars rau ntau yam substrates.
Gypsum-raws li cov khoom: HPMC thiab HEMC yog siv rau hauv cov ntaub ntawv gypsum xws li gypsum plasters, sib koom ua ke thiab nws tus kheej-leveling underlayments. Lawv ua raws li cov dej tuav cov neeg ua haujlwm, txhim kho kev ua haujlwm thiab ua kom lub sijhawm teem sijhawm ntawm cov khoom siv. Cov polymers no tseem txhim khu kev ua kom tawg, txo qhov shrinkage thiab txhim kho adhesion.
Self-Leveling Compounds: HPMC thiab HEMC tau ntxiv rau qhov sib xyaw ua ke ntawm tus kheej los txhim kho cov dej ntws thiab qib. Cov polymers no pab txo cov viscosity, tswj kev nqus dej thiab ua kom zoo dua saum npoo. Lawv kuj txhim khu lub adhesion ntawm lub compound rau lub substrate.
Grouting: HPMC thiab HEMC tuaj yeem siv rau grouting pobzeb pob qij txha thiab masonry. Lawv ua raws li kev hloov kho rheology, txhim kho cov dej ntws thiab kev ua haujlwm ntawm grouts. Cov polymers no kuj txo cov dej nkag, txhim kho adhesion thiab txhim khu kev tiv thaiv tawg.
Zuag qhia tag nrho, HPMC thiab HEMC tau siv dav hauv cov ntaub ntawv tsim kho vim lawv lub peev xwm los txhim kho cov txheej txheem, adhesion, dej tuav, thiab tag nrho kev ua tau zoo ntawm cov khoom. Lawv txhawb nqa kev tsim kho kom zoo dua los ntawm kev txhim kho cov kav ntev thiab qhov zoo ntawm ntau yam hauv tsev.
Post lub sij hawm: Jun-08-2023