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Method for improving property of paper-surface desulfurized gypsum board
The invention relates to a method for improving the property of a paper-surface desulfurized gypsum board. The method comprises the following steps of adding a foaming agent, a water reducing agent, a retarder and modified starch to saturated lime water or water, and uniformly stirring to obtain a mixed solution; pouring the obtained mixed solution into a stirring pot, then pouring desulfurized gypsum into the stirring pot within 5 seconds, stirring for 30 seconds by using a stirring rod to obtain uniform gypsum slurry; and pouring the obtained gypsum slurry to a bottom paper, then laying a surface paper, rolling for forming, and slitting and placing into a drying box for drying after the final setting of the gypsum slurry. According to the method, the thickness of the gypsum slurry is increased and removable free water is reduced by adopting a thick slurry multiple-bubble technology, so that soluble ions removed to an adhesive surface of the core of the paper-surface desulfurized gypsum board and a surface protective paper are decreased, and the adhesive strength is outstandingly improved; more closed tiny bubbles are introduced by the foaming agent, so that a board body is lighter, and the transportation and application are facilitated; and the thick and bubbly desulfurized gypsum slurry is prepared by adopting the saturated lime water, so that the breaking strength and compressive strength of a paper-surface gypsum board are enhanced.
Method for improving property of paper-surface desulfurized gypsum board
The invention relates to a method for improving the property of a paper-surface desulfurized gypsum board. The method comprises the following steps of adding a foaming agent, a water reducing agent, a retarder and modified starch to saturated lime water or water, and uniformly stirring to obtain a mixed solution; pouring the obtained mixed solution into a stirring pot, then pouring desulfurized gypsum into the stirring pot within 5 seconds, stirring for 30 seconds by using a stirring rod to obtain uniform gypsum slurry; and pouring the obtained gypsum slurry to a bottom paper, then laying a surface paper, rolling for forming, and slitting and placing into a drying box for drying after the final setting of the gypsum slurry. According to the method, the thickness of the gypsum slurry is increased and removable free water is reduced by adopting a thick slurry multiple-bubble technology, so that soluble ions removed to an adhesive surface of the core of the paper-surface desulfurized gypsum board and a surface protective paper are decreased, and the adhesive strength is outstandingly improved; more closed tiny bubbles are introduced by the foaming agent, so that a board body is lighter, and the transportation and application are facilitated; and the thick and bubbly desulfurized gypsum slurry is prepared by adopting the saturated lime water, so that the breaking strength and compressive strength of a paper-surface gypsum board are enhanced.
Method for improving property of paper-surface desulfurized gypsum board
HE JUAN (author) / HE TINGSHU (author) / DUAN FENG (author)
2015-09-02
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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