IHydroxypropylmethylcellulose HPMC njenge-dispersant, thickener kanye ne-binder ekwelashweni kwesakhiwo

I-Hydroxypropyl methylcellulose HPMC isetshenziswa kakhulu ekubumbeni udaka lukasimende kanye nemikhiqizo yegypsum njengesihlakazeka, ukuqina kanye nokuhlanganisa ekwakheni ukwelashwa. Isetshenziselwa udaka lukasimende ukwandisa ukuhlangana kwayo, ukunciphisa ukugeleza, ukuthuthukisa i-viscosity kanye nokuncipha, futhi inokugcinwa kwamanzi. Yehlisa ukulahlekelwa kwamanzi namandla okukhonkolo, vimbela imifantu kanye nesimo sezulu sikasawoti oncibilikayo emanzini; I-Hydroxypropyl methylcellulose I-HPMC ine-thixotropy, engasetshenziswa ukulungisa upende wodaka olumanzi oluncane olungafakwa ezindongeni eziqondile ngejazi elilodwa eliwugqinsi; I-HPMC ithuthukisa ukunamathela nokusebenza, ngakho ilungele ukulungiselela udaka olugelezayo olufafazayo lokudweba ungqimba oluncane.
Inani le-HPMC elisetshenziswa ezintweni zokwakha lincane kakhulu, kuphela i-0.1% ~ 1%, kodwa linomphumela omkhulu. Ingasetshenziswa njenge-plasticizer, i-tackifier, i-ejenti yokugcina amanzi, i-ejenti yokungenisa umoya kanye ne-retarder yopende, ukhonkolo, udaka kanye nemikhiqizo kasimende, ukwandisa ukusebenza kwayo, ukugcinwa kwamanzi noma ukunamathela nge-base course. Ukwengeza, ngokwezidingo zokuvikelwa kwemvelo, lapho udaka lokuxuba okomile, ukusebenza okungazinzile okubangelwa ukuxuba endaweni, ukungcoliswa kwendawo ezungezile, imvelo empofu yokwakha kanye nokusebenza kahle kokugeleza okuphansi kuyagwenywa. I-adhesive yamathayela e-ceramic kanye ne-putty yangaphakathi nengaphandle yodonga yayijwayele ukunamathela okungu-107. Ngokombono wokuvikelwa kwemvelo, i-cellulose ether ilungile, njenge-HEC ne-HPMC.
Usimende unomsebenzi omuhle wokuhlanganisa, kodwa ukusebenza kwesibopho sodaka lukasimende nodaka lukasimende kuhlukile ngokusobala ngenxa yomehluko wokusebenza nezimo phakathi kongqimba lwebhondi nendawo eboshiwe phakathi nokwakhiwa. Lapho ukusebenza kokumuncwa kwamanzi kwendawo yokubopha kukhulu, kuzobangela ukuphelelwa amandla kwamanzi endaweni yokubopha, kunciphise kakhulu ipulasitiki nokunamathela kodaka lukasimende, futhi kunciphise kakhulu amandla okubopha. Ngaphambilini, i-gypsum noma iglue engu-107 yafakwa odakeni lukasimende, kodwa kuseneziphambeko ezifana nokulinganisa okungalungile kanye nobuchwepheshe bokwakha obunzima. I-viscosity ekhulayo umphumela we-cellulose ether emanzini nesisekelo esibuthakathaka.
Imiphumela yokwengezwa kwe-cellulose ether ihlanganisa:
1. Ukwenza ngcono isikhathi sokuqala nesokugcina sokubeka usimende;
2. Thuthukisa ukucindezelwa kodaka lukasimende;
3. Ukuthuthukisa amandla okugcina amanzi kasimende negypsum;
4. Amandla acindezelayo namandla okugunda kosimende ayancipha;
5. Thuthukisa ukusebenza kokubopha kodaka.