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Gypsum plaster board with fire resistance and impact resistance

A paper-faced gypsum board, impact-resistant technology, applied in the direction of paper/cardboard layered products, papermaking, textiles and papermaking, etc., can solve the impact of crack resistance and impact resistance, affect the gypsum bond of gypsum board, affect the strength of gypsum board, etc. question

Inactive Publication Date: 2020-11-17
湖州五好建材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When the gypsum board absorbs too much water or bears more fire sources, the strength of the gypsum board will be affected. The reason is that when the internal dihydrate gypsum encounters high temperature, it will absorb heat and release crystal water. Continuous heating reduces the content of crystal water, which affects the bonding between the gypsum inside the gypsum board, and finally affects the strength of the gypsum board, and the crack resistance and impact resistance of the paper-faced gypsum board in a humid environment are greatly affected. , so it is necessary to study a kind of paper surface gypsum board with fire resistance and impact resistance

Method used

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  • Gypsum plaster board with fire resistance and impact resistance

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Effect test

Embodiment 1

[0024] A paper-faced gypsum board with fire resistance and impact resistance, which is composed of a gypsum board and protective paper attached to the upper and lower sides of the gypsum board; the gypsum board is composed of the following ingredients in weight percentage: modified starch 8.5%, 0.23% citric acid, 0.15% naphthalene-based superplasticizer, 1.8% sodium dodecylbenzenesulfonate, 1.5% Bonet, 12% corundum powder and desulfurized gypsum powder.

[0025] The preparation method of the modified starch is as follows: adding cornstarch into a kneader, controlling the temperature at 52° C., slowly adding a mixture composed of epichlorohydrin and alcohol, and stirring for 35 minutes to obtain the modified starch.

[0026] The content of calcium sulfate dihydrate in the desulfurized gypsum powder is ≥93%; the particle size of the corundum powder and desulfurized gypsum powder is 250 mesh.

[0027] The face-protecting paper contains 1.8% of micronano-scale magnesium-aluminum h...

Embodiment 2

[0035] A paper-faced gypsum board with fire resistance and impact resistance, which is composed of a gypsum board and protective paper attached to the upper and lower sides of the gypsum board; the gypsum board is composed of the following ingredients in weight percentage: modified starch 10%, 0.2% citric acid, 0.2% naphthalene-based superplasticizer, 0.8% sodium dodecylbenzenesulfonate, 2% Bonet, 10% corundum powder and desulfurized gypsum powder.

[0036] The preparation method of the modified starch is as follows: adding cornstarch into a kneader, controlling the temperature at 60° C., slowly adding a mixed solution composed of epichlorohydrin and alcohol, and stirring for 30 minutes to obtain the modified starch.

[0037] The content of calcium sulfate dihydrate in the desulfurized gypsum powder is ≥93%; the particle size of the corundum powder and desulfurized gypsum powder is 250 mesh.

[0038] The face protection paper contains 3% micro-nano magnesium aluminum hydrotalc...

Embodiment 3

[0046] A paper-faced gypsum board with fire-proof and impact-resistant properties, which is composed of gypsum board and face-protecting paper attached to the upper and lower sides of the gypsum board; the gypsum board is composed of the following ingredients in weight percentage: modified starch 6%, 0.5% citric acid, 0.1% naphthalene-based superplasticizer, 2.5% sodium dodecylbenzenesulfonate, 1% Bonet, 15% corundum powder and desulfurized gypsum powder.

[0047] The preparation method of the modified starch is as follows: adding cornstarch into a kneader, controlling the temperature at 50° C., slowly adding a mixture composed of epichlorohydrin and alcohol, and stirring for 50 minutes to obtain the modified starch.

[0048] The content of calcium sulfate dihydrate in the desulfurized gypsum powder is ≥93%; the particle size of the corundum powder and desulfurized gypsum powder is 250 mesh.

[0049] The protective paper contains 1-3% of micro-nano magnesium aluminum hydrotalc...

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Abstract

The invention discloses a gypsum plaster board with fire resistance and impact resistance. The gypsum plaster board is composed of a gypsum board body and surface protection paper attached to the upper face and the lower face of the gypsum board body. The gypsum board is composed of the following components in percentage by weight: 6-10% of modified starch, 0.2-0.5% of a retarder, 0.1-0.2% of a water reducing agent, 0.8-2.5% of an air entraining agent, 1-2% of Bonite, 10-15% of corundum powder and desulfurized gypsum powder. In order to achieve the super-strong fireproof performance, the corundum powder with the fire-resistant temperature reaching 1500 DEG C or above, the modified starch and the Bonite are added into the gypsum board. In order to achieve better impact resistance, the Bonite is added into the gypsum board, a small amount of micro-nano magnesium-aluminum hydrotalcite is added into the surface protection paper, and the impact resistance of the gypsum board can be remarkably improved through combination of the Bonite and the surface protection paper; and meanwhile, the micro-nano magnesium-aluminum hydrotalcite is also beneficial to improving the adhesive property between the surface protection paper and the gypsum board.

Description

technical field [0001] The invention relates to the technical field of gypsum boards, in particular to a paper-faced gypsum board with fireproof and impact resistance properties. Background technique [0002] Paper-faced gypsum board is a building material with a core prepared from gypsum as the main raw material and covered with protective paper on both sides. According to its function, it can be divided into water resistance, fire resistance, sound absorption, phase change, etc. Because of its light weight and easy construction, it is widely used in partition walls and ceilings of buildings. [0003] The fire resistance of gypsum board mainly includes fire stability and fire resistance limit performance. According to the fire stability and fire resistance limit, the fire resistance level of gypsum board can be divided, and the fire resistance level is related to the use function of gypsum board. The water resistance of plasterboard mainly includes surface water absorption...

Claims

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Application Information

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IPC IPC(8): C04B28/14B32B13/00B32B13/08B32B29/00D21H17/67C04B14/30C04B24/38C04B14/36C04B111/28C04B111/20
CPCB32B13/00B32B13/08B32B29/00C04B28/144C04B2111/0062C04B2111/2038C04B2111/28D21H17/675C04B24/38C04B24/06C04B2103/302C04B24/20C04B14/303C04B14/36
Inventor 邱忠
Owner 湖州五好建材股份有限公司