Muaj ntau yam uas cuam tshuam rau kev siv hydroxypropyl methylcellulose HPMC hauv cov ntaub ntawv tsim kho, tshwj xeeb tshaj yog gypsum-based plaster, raws li nram no:
1 kev khaws dej
Hydroxypropyl methylcellulose rau kev tsim kho tiv thaiv kev nqus dej ntau dhau los ntawm cov khoom siv hauv qab, thiab thaum cov gypsum teeb tsa tag nrho, cov dej yuav tsum khaws cia rau hauv plaster ntau li ntau tau. Tus cwj pwm no hu ua kev khaws dej thiab yog qhov sib piv ncaj qha rau qhov viscosity ntawm cov tshuaj hydroxypropyl methylcellulose hauv kev tsim kho hauv stucco. Qhov viscosity ntawm cov tshuaj ntau dua, nws lub peev xwm khaws dej ntau dua. Thaum cov dej ntau ntxiv, lub peev xwm khaws dej yuav txo qis. Qhov no yog vim tias cov dej ntau ntxiv ua rau cov tshuaj hydroxypropyl methylcellulose rau kev tsim kho tsis sib xws, ua rau viscosity txo qis.
2 tiv thaiv kev sagging
Ib daim plaster uas muaj cov yam ntxwv tiv thaiv kev sag tso cai rau cov neeg thov kom pleev cov txheej tuab dua yam tsis sag, thiab kuj txhais tau tias daim plaster nws tus kheej tsis yog thixotropic, uas yuav swb thaum lub sijhawm thov.
3 Txo qhov viscosity, kev tsim kho yooj yim
Cov gypsum plaster uas muaj viscosity tsawg thiab yooj yim rau kev tsim kho tuaj yeem tau los ntawm kev ntxiv ntau yam khoom siv hydroxypropyl methylcellulose rau kev tsim kho. Thaum siv cov qib viscosity qis ntawm hydroxypropyl methylcellulose rau kev tsim kho, qib viscosity raug txo qis. Kev tsim kho yooj yim dua, tab sis lub peev xwm khaws dej ntawm hydroxypropyl methylcellulose uas muaj viscosity tsawg rau kev tsim kho tsis muaj zog, thiab qhov ntxiv ntau ntxiv yuav tsum tau nce ntxiv.
4 Kev sib haum xeeb ntawm stucco
Rau cov mortar qhuav uas muaj ntau npaum li cas, nws pheej yig dua los tsim cov mortar ntub ntau dua, uas tuaj yeem ua tiav los ntawm kev ntxiv dej thiab cua npuas ntau dua. Tab sis cov dej thiab cua npuas ntau dhau lawm.
Lub sijhawm tshaj tawm: Plaub Hlis-20-2023