CN111548188B - Paper-surface gypsum board and preparation method thereof - Google Patents
Paper-surface gypsum board and preparation method thereof Download PDFInfo
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- CN111548188B CN111548188B CN202010420052.XA CN202010420052A CN111548188B CN 111548188 B CN111548188 B CN 111548188B CN 202010420052 A CN202010420052 A CN 202010420052A CN 111548188 B CN111548188 B CN 111548188B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The paper-surface gypsum board comprises a board core and a protective paper, wherein the board core comprises the following raw materials in parts by weight: 100 parts of gypsum clinker, 0.6-2 parts of glass fiber, 0.2-0.6 part of silane coupling agent, 0.3-0.5 part of water reducing agent, 0.3-0.8 part of cellulose ether, 0.01-0.02 part of nano alumina and slurry water; in the preparation process of the plate core, the silane coupling agent is mixed with slurry water and stirred. The application provides a paper gypsum board is very big has reduced the ground paste water quantity and has improved the mobility of ground paste to under the synergism of each component, hinder the growth of gypsum crystal, the gypsum crystal is more tiny in making the gypsum board, and the panel density risees, and panel strength increase, toughness improve.
Description
Technical Field
The invention relates to the technical field of building materials and the technology of paper-surface gypsum boards, in particular to a paper-surface gypsum board and a preparation method thereof.
Background
The paper-surface gypsum board is a novel main board for building decoration and has the characteristics of light weight, sound insulation, heat insulation, earthquake resistance, low shrinkage and simple and convenient construction method. The use of the paper-surface gypsum board can protect forest resources and save wood, and is the best substitute of a wooden decorative board. But the strength of the paper-faced gypsum board is lower compared to wood-made boards. In the actual production process of the gypsum plaster board, mixing water with the amount larger than the theoretical water consumption is usually added for improving the slurry fluidity, and redundant mixing water is evaporated in the drying process of the gypsum board, so that more open water holes exist in the gypsum board. These open water pores result in poor lap densification of the gypsum crystals and reduced gypsum board strength. Meanwhile, the paper-surface gypsum board is a brittle material. The development and use of gypsum board is therefore limited by its relatively low strength and toughness.
At present, the method for improving the strength and toughness of the paper-surface gypsum board mainly comprises the steps of adopting a protective paper with higher strength and adding glass fiber into the gypsum board. However, the strength of the board core cannot be improved by adopting the mask paper with higher strength; although the glass fiber has excellent mechanical properties, the glass fiber has a smooth surface and is brittle, and a strong interface is difficult to form when the glass fiber is combined with gypsum crystals, so that the toughness of the plate is difficult to greatly improve.
Disclosure of Invention
The invention provides a gypsum plaster board and a preparation method thereof, and the gypsum plaster board is characterized in that the gypsum crystal growth is hindered in the hydration and condensation process of the gypsum plaster board through the synergistic action of gypsum clinker, glass fiber, cellulose ether, water reducing agent, nano-alumina and silane coupling agent, the gypsum crystal becomes tiny, the density of the board is increased, and the board is more bent along the crystal fracture curve when the board is fractured, so that the strength and the toughness of the gypsum plaster board are improved, the expansion path of the crack and the tip of the crack are favorably changed when the gypsum plaster board is fractured, and the constraint degree of a matrix is reduced. The invention finally improves the strength and toughness of the gypsum board by various means.
The invention provides a paper-surface gypsum board, which comprises a board core and a protective paper, wherein the board core comprises the following raw materials in parts by weight: 100 parts of gypsum clinker, 0.6-2 parts of glass fiber, 0.2-0.6 part of silane coupling agent, 0.3-0.5 part of water reducing agent, 0.3-0.8 part of cellulose ether, 0.01-0.02 part of nano alumina and slurry water; optionally, the paper-faced gypsum board core raw material consists of the above components.
In the preparation process of the plate core, the silane coupling agent, the nano-alumina and slurry water are mixed and stirred.
In the paper-surface gypsum board provided by the invention, the main component of the gypsum clinker is calcium sulfate hemihydrate, and the gypsum clinker is prepared from natural gypsum or industrial byproduct gypsum, and the preparation method of the clinker can be carried out by adopting a method commonly used in the field.
In the paper-surface gypsum board provided by the invention, the silane coupling agent is selected from one or two of KH550 and KH 560.
In the paper-surface gypsum board provided by the invention, the glass fiber is a chopped fiber with the length of 5-10 mm.
In the paper-surface gypsum board provided by the invention, the water reducing agent is a polycarboxylic acid water reducing agent;
preferably, the polycarboxylic acid water reducing agent is a polyoxyethylene grafted polycarboxylic acid polymer.
In the paper-surface gypsum board provided by the invention, the cellulose ether is hydroxypropyl methyl cellulose; preferably, the cellulose ether has a viscosity of 75000mPa s-200000mPa s.
In the paper-faced gypsum board provided by the invention, the average grain diameter of the nano alumina is 30-40 nm.
In the paper-surface gypsum board provided by the invention, the board core raw material comprises 0.3-0.6 part of starch, 0.03-0.075 part of foaming agent and 60-65 parts of slurry water by weight part and taking the dosage of gypsum clinker as 100 parts by weight.
In the gypsum plaster board provided by the invention, the starch is selected from one or two of modified corn starch and modified tapioca starch;
optionally, the starch gelatinization temperature is 70-75 ℃.
In the paper-surface gypsum board provided by the invention, the foaming agent is added in the form of a foaming agent solution with the mass fraction of 1% -1.5%, and preferably, the mass fraction of the foaming agent solution is 1.5%.
In the thistle board provided by the invention, the foaming agent consists of an anionic surfactant and a foam stabilizer, wherein the anionic surfactant is selected from one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and fatty alcohol-polyoxyethylene ether sodium sulfate;
optionally, the foam stabilizer is a silicone polyether emulsion;
optionally, the mass ratio of the anionic surfactant to the foam stabilizer is 1 (0.8-1), and the mass ratio of the surfactant to the foam stabilizer is preferably 1: 1.
On the other hand, the invention also provides a preparation method of the paper-surface gypsum board, which comprises the following steps:
1) mixing a silane coupling agent with slurry water, and stirring for 0.5-2 h;
2) uniformly mixing gypsum, glass fiber, a water reducing agent, cellulose ether, starch and nano-alumina with the slurry water containing the silane coupling agent obtained in the step 1) to form gypsum slurry;
3) uniformly mixing the gypsum slurry with the foaming agent solution, pouring the mixture on the lower protective paper, paving the upper protective paper on the upper surface of the gypsum slurry, and forming to obtain a wet plate;
4) after the wet board is solidified, drying to obtain the paper-surface gypsum board; optionally, the method for preparing the paper-surface gypsum board consists of the steps.
In the method for preparing the paper-surface gypsum board, the drying in the step 4) comprises more than two drying stages with descending drying temperature.
In the preparation method of the gypsum plaster board, the drying in the step 4) has three drying stages, the drying time of the first drying stage is 0.2-0.3h, and the drying temperature is 170-190 ℃; the drying time of the second drying stage is 0.2-0.3h, and the drying temperature is 160-; the drying time of the third drying stage is 0.3-0.4h, and the drying temperature is 100-110 ℃.
The invention has the advantages that:
according to the paper-surface gypsum board provided by the invention, the silane coupling agent, the nano-alumina and the water reducing agent are added, and the components are compounded to obtain a synergistic interaction effect, so that the growth of gypsum crystals is hindered, the gypsum crystals become fine, the density of the board is increased, the strength and toughness of the board are improved, and the amount of slurry water is reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Other advantages of the invention may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification.
Drawings
The accompanying drawings are included to provide an understanding of the present invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the examples serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is an SEM image of a cross section of a paper-faced gypsum board prepared in example 1 and comparative example 2. The left figure is an SEM image of a section of the gypsum plaster board prepared in example 1, and the right figure is an SEM image of a section of the gypsum plaster board prepared in comparative example 2. It can be seen from the figure that the gypsum crystal growth is hindered in the process of hydration and coagulation of the gypsum board, the gypsum crystal becomes fine, and the density of the board is increased.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below. It should be noted that the embodiments and features of the embodiments of the present invention may be arbitrarily combined with each other without conflict.
The embodiment of the invention provides a paper-surface gypsum board and a preparation method thereof. The thistle board, including board core and mask paper, board core raw materials include by weight: 100 parts of gypsum clinker, 0.6-2 parts of glass fiber, 0.2-0.6 part of silane coupling agent, 0.3-0.5 part of water reducing agent, 0.3-0.8 part of cellulose ether, 0.01-0.02 part of nano alumina and slurry water;
in the preparation process of the plate core, the silane coupling agent and slurry water are mixed and stirred.
In the embodiment of the invention, the main component of the gypsum clinker is calcium sulfate hemihydrate, and the clinker is prepared from natural gypsum or industrial byproduct gypsum, and the preparation method of the clinker can be carried out by adopting a method commonly used in the field.
In the embodiment of the invention, the silane coupling agent is selected from one or two of KH550 and KH 560.
In the embodiment of the invention, the glass fiber is chopped fiber with the length of 5-10 mm.
In the embodiment of the invention, the water reducing agent is a polycarboxylic acid water reducing agent;
preferably, the polycarboxylic acid water reducing agent is a polyoxyethylene grafted polycarboxylic acid polymer.
In an embodiment of the invention, the cellulose ether is hydroxypropyl methylcellulose; preferably, the cellulose ether has a viscosity of 75000mPa s-200000mPa s.
In the embodiment of the invention, the average grain diameter of the nano-alumina is 30-40 nm.
In the embodiment of the invention, the board core raw material further comprises 0.3-0.6 part of starch, 0.03-0.075 part of foaming agent and 60-65 parts of slurry water in parts by weight and based on 100 parts by weight of the used amount of the gypsum clinker.
In an embodiment of the invention, the starch is selected from one or both of modified corn starch and modified tapioca starch;
optionally, the starch gelatinization temperature is 70-75 ℃.
In the embodiment of the invention, the foaming agent is added in the form of a foaming agent solution with the mass fraction of 1% -1.5%, and preferably, the mass fraction of the foaming agent solution is 1.5%.
In the embodiment of the invention, the foaming agent consists of an anionic surfactant and a foam stabilizer, wherein the anionic surfactant is selected from one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and sodium fatty alcohol-polyoxyethylene ether sulfate;
optionally, the foam stabilizer is a silicone polyether emulsion;
optionally, the mass ratio of the anionic surfactant to the foam stabilizer is 1 (0.8-1), and the mass ratio of the surfactant to the foam stabilizer is preferably 1: 1.
In the embodiment of the invention, the drying in the step 5) has three drying stages, the drying time of the first drying stage is 0.2-0.3h, and the drying temperature is 170-190 ℃; the drying time of the second drying stage is 0.2-0.3h, and the drying temperature is 160-; the drying time of the third drying stage is 0.3-0.4h, and the drying temperature is 100-110 ℃.
Example 1
The embodiment provides a high-strength and high-toughness paper-surface gypsum board, which specifically comprises the following components:
100 parts of gypsum clinker, 0.6 part of glass fiber, 0.2 part of silane coupling agent, 0.3 part of water reducing agent, 0.8 part of cellulose ether, 0.02 part of nano alumina, 0.3 part of starch, 3 parts of foaming agent solution (the mass fraction of the foaming agent solution is 1.1%) and 65 parts of slurry water.
Wherein the gypsum clinker is prepared from desulfurized gypsum, and the desulfurized gypsum is derived from a Guohua power plant; the glass fiber is chopped glass fiber with the average length of 6 mm; the silane coupling agent is purchased from Hangzhou Jessica chemical company and has the trade name of KH-550; the water reducing agent is a polyoxyethylene grafted polycarboxylic acid polymer which is purchased from Pasteur Limited and has the mark of 312; the starch is modified cassava starch, and the pre-gelatinization temperature of the modified cassava starch is 70 ℃; the foaming agent is purchased from Japan Huawang company and is marked by FA 201; the hydroxypropyl methyl cellulose with the viscosity of 100000mpa & S is purchased from Longhu science and technology Limited and has the trade name of HPMC-100000S; the average grain diameter of the nano alumina is 30nm, and the nano alumina is purchased from Shanghai allowed nano technology Limited company and has the mark of YF 005-N30.
The specific preparation of the gypsum board of this example includes the following steps:
1) weighing a silane coupling agent and slurry water, mixing and stirring for 0.5 h;
2) uniformly mixing gypsum, glass fiber, a water reducing agent, cellulose ether, starch and nano-alumina in slurry water containing a silane coupling agent in a mixer to form gypsum slurry;
3) adding a foaming agent solution at the outlet of the mixer, mixing the foaming agent solution with the gypsum slurry, and pouring the mixture on the mask paper; lapping and firmly adhering the gypsum slurry and the mask paper to form a wet plate;
4) and (4) after the wet board is solidified, the wet board enters a drier, and the dried wet board is the thistle board.
5) And (3) after the wet board is solidified, the wet board enters a dryer, and the wet board is dried in three drying stages to obtain the high-strength high-toughness 9.5mm paper-surface gypsum board.
Example 2
The embodiment provides a high-strength and high-toughness paper-surface gypsum board, which specifically comprises the following components:
100 parts of gypsum clinker, 1 part of glass fiber, 0.3 part of silane coupling agent, 0.4 part of water reducing agent, 0.7 part of cellulose ether, 0.02 part of nano alumina, 0.4 part of starch, 4 parts of foaming agent solution (the mass fraction of the foaming agent solution is 1.3%) and 62 parts of slurry water.
Wherein the gypsum clinker is prepared from desulfurized gypsum, and the desulfurized gypsum is derived from a Guohua power plant; the glass fiber is chopped glass fiber with the average length of 8 mm; the silane coupling agent is purchased from Jeccard chemical company, Hangzhou under the mark KH 560; the water reducing agent is a polyoxyethylene grafted polycarboxylic acid polymer which is purchased from Pasteur company and is 312 in mark; the starch is modified corn starch, and the pre-gelatinization temperature of the modified corn starch is 72 ℃; the foaming agent was purchased from japan queen flower company, DL281 brand; hydroxypropyl methylcellulose having a viscosity of 75000 mpa-S of cellulose ether available from Longhu science and technology Limited under the HPMC-100000S designation; the average grain diameter of the nano alumina is 30nm, and the nano alumina is purchased from Shanghai allowed nano technology Limited company and has the mark of YF 005-N30.
The specific preparation of the gypsum board of this example includes the following steps:
1) weighing a silane coupling agent and slurry water, mixing and stirring for 2 hours;
2) uniformly mixing gypsum, glass fiber, a water reducing agent, cellulose ether, starch and nano-alumina in slurry water containing a silane coupling agent in a mixer to form gypsum slurry;
3) adding a foaming agent solution at the outlet of the mixer, mixing the foaming agent solution with the gypsum slurry, and pouring the mixture on the mask paper; lapping and firmly adhering the gypsum slurry and the mask paper to form a wet plate;
4) and (4) after the wet board is solidified, the wet board enters a drier, and the dried wet board is the thistle board.
Example 3
The embodiment provides a high-strength and high-toughness paper-surface gypsum board, which specifically comprises the following components:
100 parts of gypsum clinker, 2 parts of glass fiber, 0.6 part of silane coupling agent, 0.5 part of water reducing agent, 0.3 part of cellulose ether, 0.01 part of nano-alumina, 0.3 part of starch and 60 parts of slurry water, wherein the mass fraction of the foaming agent solution is 1.5%.
Wherein the gypsum clinker is prepared from desulfurized gypsum, and the desulfurized gypsum is derived from a Guohua power plant; the glass fiber is chopped glass fiber with the average length of 10 mm; the silane coupling agent is purchased from Hangzhou Jessica chemical company, KH550 brand; the water reducing agent is a polyoxyethylene grafted polycarboxylic acid polymer which is purchased from Pasteur company and is 312 in mark; the starch is modified cassava starch, and the pre-gelatinization temperature of the modified cassava starch is 75 ℃; the foaming agent was purchased from japan queen flower company, DL281 brand; hydroxypropyl methylcellulose with viscosity of 200000 mpa-S, which is purchased from Longhu science and technology Limited, HPMC-200000S; the average grain diameter of the nano alumina is 40nm, and the nano alumina is purchased from Shanghai allowed nano technology Limited company and has the mark of YF 005-N40.
The specific preparation of the gypsum board of this example includes the following steps, which are the same as those of the gypsum board of example 1.
Comparative example 1
This comparative example differs from example 1 only in that no silane coupling agent is added (i.e., no modification of gypsum and glass fibers is made). The remaining raw materials and preparation steps were the same as in example 1.
Comparative example 2
The comparative example is different from example 1 only in that no water reducing agent is added and the amount of slurry water is 70 parts. The remaining raw materials and preparation steps were the same as in example 1.
Comparative example 3
This comparative example differs from example 1 only in that no cellulose ether was added. The remaining raw materials and preparation steps were the same as in example 1.
Comparative example 4
This comparative example differs from example 1 only in that nano alumina is not added. The remaining raw materials and preparation steps were the same as in example 1.
Performance testing
The gypsum boards of 9.5mm gypsum plasterboard prepared in the above examples and comparative examples were subjected to breaking load and shear force tests according to the national standard GB/T9775-.
TABLE 1 Gypsum board Performance test results
It is known from table 1 that the transverse and longitudinal breaking loads of the thistle board prepared in the embodiments 1-3 of the present invention are much higher than the regulations of the national standard GB/T9775-.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The paper-surface gypsum board comprises a board core and a protective paper, wherein the board core is prepared from the following raw materials in parts by weight: 100 parts of gypsum clinker, 0.6-2 parts of glass fiber, 0.2-0.6 part of silane coupling agent, 0.3-0.5 part of water reducing agent, 0.3-0.8 part of cellulose ether, 0.01-0.02 part of nano alumina, 0.3-0.6 part of starch, 0.03-0.075 part of foaming agent and 60-65 parts of slurry water;
in the preparation process of the plate core, the silane coupling agent is mixed with slurry water and stirred;
the water reducing agent is a polycarboxylic acid water reducing agent;
the cellulose ether is nonionic cellulose ether selected from one or two of hydroxypropyl methyl cellulose or methyl cellulose ether.
2. The paper-faced gypsum board of claim 1, wherein the silane coupling agent is selected from one or more of a vinyl silane coupling agent, an amino silane coupling agent, an epoxy silane coupling agent, a methacryloxy silane coupling agent, a mercapto silane coupling agent, or a ureido silane coupling agent.
3. The gypsum plasterboard of claim 2, wherein the silane coupling agent is selected from one or both of KH550 and KH 560.
4. The gypsum plasterboard of claim 1, wherein the glass fibres are chopped fibres having a length of 5-10 mm.
5. The gypsum plasterboard of claim 1, wherein the polycarboxylate water reducer is a polyoxyethylene-grafted polycarboxylic acid polymer.
6. The gypsum plasterboard of claim 1, wherein the cellulose ether has a viscosity of 75000 mpa-s to 200000 mpa-s.
7. The gypsum plasterboard of claim 1, wherein the nano-alumina has an average particle size of 30-40 nm.
8. The gypsum plasterboard of claim 1, wherein the starch is selected from one or both of modified corn starch and modified tapioca starch.
9. The gypsum plasterboard of claim 8, wherein the starch has a gelatinisation temperature of 70-75 ℃.
10. A method of making the paper-faced gypsum board of claim 8 or 9, comprising the steps of:
1) mixing a silane coupling agent with slurry water, and stirring;
2) uniformly mixing gypsum clinker, glass fiber, a water reducing agent, cellulose ether, starch and nano alumina with the slurry water containing the silane coupling agent obtained in the step 1) to form gypsum slurry;
3) uniformly mixing the gypsum slurry with a foaming agent, pouring the mixture on a lower protective paper, paving an upper protective paper on the upper surface of the gypsum slurry, and forming to obtain a wet plate;
4) and after the wet board is solidified, drying to obtain the paper-surface gypsum board.
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| CN112223524A (en) * | 2020-09-08 | 2021-01-15 | 淮南北新建材有限公司 | Production method capable of improving shearing force of gypsum plasterboard |
| CN112374847A (en) * | 2020-10-19 | 2021-02-19 | 四川蓝鼎新材料有限公司 | Method for producing paper gypsum by using desulfurized gypsum |
| CN112390604A (en) * | 2020-10-20 | 2021-02-23 | 中建材创新科技研究院有限公司 | Glass thin felt gypsum board and preparation method thereof |
| CN112707708B (en) * | 2020-12-29 | 2022-06-03 | 中建材创新科技研究院有限公司 | Paper-surface gypsum board and preparation method thereof |
| CN113800869A (en) * | 2021-08-26 | 2021-12-17 | 北新集团建材股份有限公司 | Gypsum board |
| CN114804801A (en) * | 2022-04-19 | 2022-07-29 | 泰山石膏（江阴）有限公司 | Water reducing agent-based gypsum plaster board and preparation method thereof |
| CN116589259A (en) * | 2023-05-31 | 2023-08-15 | 阜新泰山石膏建材有限公司 | Mildew-proof high-strength high-toughness paper gypsum board and preparation method thereof |
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| CA1279877C (en) * | 1986-08-28 | 1991-02-05 | Richard J. Flanagan | High-strength, fire-resistant gypsum composition |
| FR2811980B1 (en) * | 2000-07-18 | 2003-04-25 | Lafarge Platres | COMPOSITION FOR PLASTERBOARD, PREPARATION OF THIS COMPOSITION AND MANUFACTURE OF PLASTERBOARDS |
| CN106220118B (en) * | 2016-07-29 | 2018-08-28 | 佛山市高明区诚睿基科技有限公司 | A kind of composite glass fiber reinforced plasterboard and its manufacturing method |
| CN107053431B (en) * | 2017-03-21 | 2019-07-26 | 梦牌新材料(宣城)有限公司 | A kind of high-intensitive, fire-proof and water-proof Thistle board and its preparation process |
| CN106946538B (en) * | 2017-03-21 | 2018-01-26 | 宣城万佳建材股份有限公司 | A kind of high intensity, fire-proof and water-proof Thistle board |
| CN109574541A (en) * | 2017-09-28 | 2019-04-05 | 上海君忱新材料科技有限公司 | A kind of gypsum reinforcing agent and preparation method thereof |
| CN109320184B (en) * | 2018-10-30 | 2020-12-01 | 梦牌新材料（宁国）有限公司 | Light fire-resistant gypsum board and preparation method thereof |
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