CN114276103B - Heat-preservation and heat-insulation paper-surface gypsum board and preparation method thereof - Google Patents
Heat-preservation and heat-insulation paper-surface gypsum board and preparation method thereof Download PDFInfo
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- CN114276103B CN114276103B CN202111360491.7A CN202111360491A CN114276103B CN 114276103 B CN114276103 B CN 114276103B CN 202111360491 A CN202111360491 A CN 202111360491A CN 114276103 B CN114276103 B CN 114276103B
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Abstract
A heat-preserving and heat-insulating paper-surface gypsum board and a preparation method thereof, the preparation raw materials of the paper-surface gypsum board comprise gypsum clinker, water, aerogel paste, ethylene-vinyl acetate copolymer emulsion, vitrified micro bubbles, glass fiber, a retarder and starch, and the addition amount of each raw material is the same as that of the specification; wherein the aerogel paste is used for water-based building materials. The paper-surface gypsum board has excellent heat insulation performance and fire stability, and the bonding performance and the strength are good in mechanics.
Description
Technical Field
The application relates to the field of but not limited to building materials, in particular to a heat-preservation and heat-insulation paper-surface gypsum board and a preparation method thereof.
Background
Under the large background of the national strong advocation of building energy conservation, the development of the heat preservation, heat insulation and energy conservation performance of indoor building materials is particularly important. In recent years, fire disasters in the field of building heat preservation and energy conservation are frequently found, and the application defects of organic heat preservation materials widely applied to the market are revealed. The development trend of the industry is inevitable when the fire-proof grade of building materials is improved and the fire-proof heat-insulating materials with low heat conductivity coefficient are popularized.
At present, the paper-surface gypsum board is used as a preferred material for interior decoration, and is generally applied to public places such as markets, hospitals and the like and home decoration. The increasingly wide application of the gypsum plasterboard puts higher requirements on the heat insulation performance and the fire resistance of the gypsum plasterboard. Therefore, it is necessary to develop a gypsum plaster board with better heat preservation and insulation properties to replace the existing fire-resistant gypsum plaster board so as to create a safer and more comfortable indoor decoration environment.
The paper-surface gypsum board is compounded with proper heat-insulating material, so that it can obtain good heat-insulating property. The aerogel is an A-grade fireproof heat-insulating material with excellent heat-insulating property, has a thermal conductivity coefficient within the range of 0.013W/(m.K) to 0.03W/(m.K), is far lower than that of the existing inorganic heat-insulating materials in the market in the field of building heat-insulating and energy-saving, has good heat-insulating property and fireproof property, is an ideal substitute of the traditional heat-insulating material, and has good application prospect.
However, the aerogel is light, and when the aerogel is used for preparing a paper-surface gypsum board, the aerogel is easy to float and fly away in the process of preparing gypsum slurry and is difficult to be blended into a gypsum slurry system. In addition, when the aerogel and inorganic cementing materials such as gypsum and the like are compounded into a board, the bonding performance of the gypsum board is seriously reduced, the strength of the board is obviously reduced and even is lower than the national standard, and the use is influenced.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the present application.
The application provides a heat-preservation and heat-insulation paper-surface gypsum board and a preparation method thereof, the preparation method is simple, the problems that aerogel is easy to fly and is unevenly dispersed in the gypsum board are solved, the heat-preservation and heat-insulation performance of the gypsum board is improved, and the bonding performance and the mechanical strength of the gypsum board are not adversely affected.
The application provides a heat preservation insulated paper surface gypsum board, the preparation raw materials of heat preservation insulated paper surface gypsum board include gypsum clinker, water, aerogel cream, ethylene-vinyl acetate copolymer emulsion, vitrified micro bubbles, glass fiber, retarder and starch, with the addition of gypsum clinker is 100 parts by weight, the addition of water is 40 parts by weight to 80 parts by weight, the addition that the content that uses the active ingredient aerogel of aerogel cream is 0.5 parts by weight to 5 parts by weight, the addition of ethylene-vinyl acetate copolymer emulsion is 5 parts by weight to 20 parts by weight, the addition of vitrified micro bubbles is 0.1 parts by weight to 2 parts by weight, the addition of glass fiber is 0.05 parts by weight to 0.2 parts by weight, the addition of retarder is 0.2 parts by weight to 1 part by weight, the addition of starch is 0.2 parts by weight to 1 part by weight;
wherein the aerogel paste is used for water-based building materials.
In the embodiment of the present application, the addition amount of the water may be 60 to 80 parts by weight, the addition amount of the aerogel paste based on the content of the aerogel serving as the active ingredient may be 2 to 5 parts by weight, the addition amount of the ethylene-vinyl acetate copolymer emulsion may be 10 to 20 parts by weight, the addition amount of the vitrified micro beads may be 0.1 to 2 parts by weight, the addition amount of the glass fiber may be 0.08 to 0.2 parts by weight, the addition amount of the retarder may be 0.2 to 1 part by weight, and the addition amount of the starch may be 0.2 to 1 part by weight, based on 100 parts by weight of the addition amount of the gypsum clinker.
In the embodiment of the present application, the aerogel content in the aerogel paste may be greater than or equal to 30% by weight.
In embodiments of the present application, the gypsum clinker may be selected from any one or more of desulfurized gypsum clinker, phosphogypsum clinker and natural gypsum clinker.
In embodiments of the present application, the glass fibers may be selected from any one or more of medium alkali glass fibers, alkali-free glass fibers, and alkali-resistant glass fibers.
In embodiments of the present application, the retarder may be selected from any one or more of citric acid, sodium citrate, sodium hexametaphosphate, borax, and protein-based retarders.
In the embodiment of the present application, the retarder may be any one or more selected from a bone cement protein retarder and a protein gypsum retarder in which degraded polyamide is calcium-salted.
The application also provides a preparation method of the heat-preservation and heat-insulation paper-surface gypsum board, which comprises the following steps:
weighing gypsum clinker, water, aerogel paste, ethylene-vinyl acetate copolymer emulsion, vitrified micro bubbles, glass fiber, a retarder and starch in parts by weight;
step two, uniformly mixing the vitrified micro bubbles, a part of starch, the ethylene-vinyl acetate copolymer emulsion and the aerogel paste to obtain an aerogel paste dispersion;
step three, uniformly mixing the gypsum clinker, the residual starch, the glass fiber and the retarder;
step four, adding water into the mixture obtained in the step three, and uniformly stirring to prepare gypsum slurry;
step five, adding the aerogel paste dispersoid obtained in the step two into the gypsum paste obtained in the step four, and stirring to obtain paste;
and step six, attaching upper and lower protective paper sheets to the slurry obtained in the step five, forming and drying to obtain the heat-preservation and heat-insulation paper-surface gypsum board.
The method adopts the aerogel paste to prepare the thistle board, overcomes the problems that the aerogel is easy to fly and is unevenly dispersed in the thistle board, and the prepared thistle board has excellent heat-insulating property and fire-encountering stability and belongs to a heat-insulating thistle board; and the paper-surface gypsum board has good bonding performance and strength mechanics, and is not adversely affected by the addition of the aerogel paste.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and methods described in the specification.
Detailed Description
Hereinafter, embodiments of the present application will be described in detail to make objects, technical solutions and advantages of the present application more apparent. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The embodiment of the application provides a heat preservation paper surface gypsum board, the preparation raw materials of heat preservation paper surface gypsum board includes gypsum clinker, water, aerogel cream, ethylene-vinyl acetate copolymer emulsion, vitrified micro bubble, glass fiber, retarder and starch, with the addition of gypsum clinker is 100 parts by weight, the addition of water is 40 parts by weight to 80 parts by weight, the addition that uses the active ingredient aerogel of aerogel cream is 0.5 parts by weight to 5 parts by weight, the addition of ethylene-vinyl acetate copolymer emulsion is 5 parts by weight to 20 parts by weight, the addition of vitrified micro bubble is 0.1 parts by weight to 2 parts by weight, glass fiber's addition is 0.05 parts by weight to 0.2 parts by weight, the addition of retarder is 0.2 parts by weight to 1 part by weight, the addition of starch is 0.2 parts by weight to 1 part by weight.
In the present application, the term "aerogel paste" is defined as an aerogel paste for (i.e., capable of being added to) aqueous building materials, such as aqueous paints, gypsum products, cementitious products, and the like.
In the embodiment of the present application, the addition amount of the water may be 60 to 80 parts by weight, the addition amount of the aerogel paste based on the content of the aerogel serving as the active ingredient may be 2 to 5 parts by weight, the addition amount of the ethylene-vinyl acetate copolymer emulsion may be 10 to 20 parts by weight, the addition amount of the vitrified micro beads may be 0.1 to 2 parts by weight, the addition amount of the glass fiber may be 0.08 to 0.2 parts by weight, the addition amount of the retarder may be 0.2 to 1 part by weight, and the addition amount of the starch may be 0.2 to 1 part by weight, based on 100 parts by weight of the addition amount of the gypsum clinker.
In the embodiment of the present application, the aerogel paste may be a thermal insulation dispersion type aerogel paste, for example, a KNF-G model aerogel dispersion paste available from Keon nanotechnology, inc. may be used.
In the embodiment of the present application, the aerogel content in the aerogel paste may be greater than or equal to 30% by weight.
In embodiments of the present application, the gypsum clinker may be selected from any one or more of desulfurized gypsum clinker, phosphogypsum clinker and natural gypsum clinker.
Preferably, the gypsum clinker is selected from any one or two of desulfurized gypsum clinker and natural gypsum clinker.
In the embodiment of the application, the gypsum clinker is desulfurized gypsum clinker, and the desulfurized gypsum clinker is prepared from flue gas desulfurization gypsum with chloride ion content of less than or equal to 400 mg/kg.
In an embodiment of the present application, the desulfurized gypsum clinker may have a specific surface area of 3500cm 2 G to 4000cm 2 /g。
In the examples of the present application, the vitrified small ballsMay have a diameter of 20 μm to 100 μm and a density of 100kg/m 3 To 150kg/m 3 。
In embodiments of the present application, the glass fibers may be selected from any one or more of medium alkali glass fibers, alkali-free glass fibers, and alkali-resistant glass fibers.
In embodiments of the present application, the glass fiber may have a fiber length of 9mm to 15mm and a fiber monofilament diameter of 10 μm to 15 μm.
In embodiments of the present application, the retarder may be selected from any one or more of citric acid, sodium citrate, sodium hexametaphosphate, borax, and protein-based retarders.
In the embodiment of the present application, the retarder may be selected from any one or more of a bone glue protein retarder and a protein gypsum retarder in which degraded polyamide is calcium-salted.
The embodiment of the application also provides a preparation method of the heat-preservation and heat-insulation paper-surface gypsum board, which comprises the following steps:
weighing gypsum clinker, water, aerogel paste, ethylene-vinyl acetate copolymer emulsion, vitrified micro bubbles, glass fiber, a retarder and starch in parts by weight;
step two, uniformly mixing the vitrified micro bubbles, a part of starch, the ethylene-vinyl acetate copolymer emulsion and the aerogel paste to obtain an aerogel paste dispersoid;
step three, uniformly mixing the gypsum clinker, the residual starch, the glass fiber and the retarder;
step four, adding water into the mixture obtained in the step three, and uniformly stirring to prepare gypsum slurry;
step five, adding the aerogel paste dispersoid obtained in the step two into the gypsum slurry obtained in the step four, and stirring to obtain slurry;
and step six, attaching upper and lower protective paper sheets to the slurry obtained in the step five, forming and drying to obtain the heat-preservation and heat-insulation paper-surface gypsum board.
In the examples of the present application, the weight ratio of the content of starch added in step two and step three may be 1 (2 to 5), for example, may be 1.
In an embodiment of the present application, step six may include: throwing the slurry obtained in the fifth step onto a lower protective paper on a forming table under the action of centrifugal force before initial setting, extruding the slurry by a forming cutter under the driving of the traction force of a setting belt, folding the lower protective paper into a right angle along the roller mark, overlapping the lower protective paper and the slurry with the upper protective paper under the extrusion of the forming plate, firmly bonding the lower protective paper and the slurry to form a wet plate, and then leading the wet plate out under the traction of the setting belt to finish forming; and (3) after the wet board is solidified on the conveying belt and cut off, feeding the board into a dryer, and drying to obtain the heat-insulation gypsum board.
In an embodiment of the application, the drying phase may comprise: a first drying stage: the drying temperature can be 150 ℃ to 200 ℃, and the drying time can be 0.5h to 1h; a second drying stage: the drying temperature can be 100 ℃ to 130 ℃, and the drying time can be 0.5h to 1.5h; a third drying stage: the drying temperature can be 45 ℃ to 60 ℃, and the drying time can be 12h to 36h.
In the following examples, the used desulfurized gypsum clinker was prepared from solid waste desulfurized gypsum produced by flue gas desulfurization in power plants, and had a specific surface area of 3500cm 2 G to 4000cm 2 Within the range of/g, the content of chloride ions is less than or equal to 400mg/kg; the aerogel paste is purchased from Anhui Ke' on nanometer science and technology Limited, and has a model of KNF-G, wherein the content of aerogel is 30%; the polyvinyl acetate-ethylene emulsion is purchased from Beijing Kaimett scientific development Co., ltd, and has the model of Vinamul8482; the vitrified micro bubbles are purchased from Kaixian basic materials science and technology Co., ltd, anhui, model 15P500, have a diameter of 35 to 80 μm and a density of 0.14g/cm 3 (ii) a The glass fiber is purchased from mineral products limited of Jinghang Hangzhou, hebei, is alkali-free glass fiber, the fiber length is 10mm, and the fiber monofilament diameter is 10 mu m; the retarder is a protein gypsum retarder formed by calcium calcification of degraded polyamide and is purchased from Qinzhi Shanghai and chemical engineering Co Ltd; modified corn starch was purchased from jinan yuan chemical ltd.
Example 1
The gypsum plasterboard of this example was prepared by:
weighing 100 parts by weight of desulfurized gypsum clinker, 44 parts by weight of water, 2.67 parts by weight of aerogel paste (equivalent to adding 0.8 part by weight of aerogel, namely adding 0.8 part by weight of aerogel serving as an active ingredient of the aerogel paste), 19 parts by weight of polyvinyl acetate-ethylene emulsion, 2 parts by weight of vitrified micro bubbles, 0.08 part by weight of glass fiber, 0.28 part by weight of retarder and 0.3 part by weight of modified starch;
fully mixing the vitrified micro bubbles, 20 wt% of starch, polyvinyl acetate-ethylene emulsion and aerogel paste to form a uniformly dispersed state to obtain an aerogel paste dispersoid;
step three, uniformly mixing the desulfurized gypsum clinker, 80 wt% of starch, glass fiber and retarder;
step four, adding water into the mixture prepared in the step three, and uniformly stirring to prepare gypsum slurry;
step five, adding the aerogel paste dispersoid obtained in the step two into the gypsum paste obtained in the step four, and quickly stirring and dispersing to obtain paste, wherein the paste is not initially set;
step six, throwing the slurry obtained in the step five onto a lower protective paper on a forming table under the action of centrifugal force before initial setting, extruding the slurry by a forming cutter under the driving of a traction force of a setting belt, folding the lower protective paper along a roller mark of the lower protective paper into a right angle, overlapping the lower protective paper and the slurry with the upper protective paper under the extrusion of the forming plate, firmly bonding the lower protective paper and the slurry to form a wet plate, and then leading the wet plate out under the traction of the setting belt to finish forming; after the wet plate is solidified on a conveying belt and cut off, the wet plate enters a dryer and is dried in three drying stages, wherein the drying temperature of the first drying stage is 180 ℃, and the drying time is 0.7h; the drying temperature of the second drying stage is 110 ℃, and the drying time is 1h; the drying temperature of the third drying stage is 45 ℃, and the drying time is 36 hours, so that a dried plate is obtained;
step seven: and (3) combining the dried boards, sawing edges, sealing edges and packaging to obtain a finished product of the gypsum plasterboard with the thickness of 12 mm.
Example 2
The gypsum plasterboard of this example was prepared by:
weighing 100 parts by weight of desulfurized gypsum clinker, 50 parts by weight of water, 15 parts by weight of aerogel paste (equivalent to adding 4.5 parts by weight of aerogel, namely adding 4.5 parts by weight of aerogel serving as an effective component of the aerogel paste), 12 parts by weight of polyvinyl acetate-ethylene emulsion, 0.5 part by weight of vitrified micro bubbles, 0.12 part by weight of glass fiber, 0.8 part by weight of retarder and 0.5 part by weight of modified starch;
steps two to seven are the same as in example 1.
Example 3
The gypsum plasterboard of this example was prepared by:
step one, weighing the following components: 100 parts of desulfurized gypsum clinker, 60 parts of water, 8.33 parts of aerogel paste (equivalent to 2.5 parts of aerogel, namely the addition amount of 2.5 parts of aerogel based on the content of the aerogel serving as an effective component of the aerogel paste), 15 parts of polyvinyl acetate-ethylene emulsion, 1 part of vitrified micro bubbles, 0.2 part of glass fiber, 0.5 part of retarder and 0.8 part of modified starch; steps two to seven are the same as in example 1.
Comparative example 1 (without emulsion)
The paper-faced gypsum board of this comparative example was prepared by the following method:
step one, weighing 100 parts by weight of desulfurized gypsum, 44 parts by weight of water, 2.67 parts by weight of aerogel paste, 2 parts by weight of vitrified micro bubbles, 0.08 part by weight of glass fiber, 0.28 part by weight of retarder and 0.3 part by weight of modified starch.
Steps two to seven are the same as in example 1.
Comparative example 2 (emulsion added in step four)
The paper-faced gypsum board of this comparative example was prepared by the following method:
weighing 100 parts by weight of desulfurized gypsum clinker, 44 parts by weight of water, 2.67 parts by weight of aerogel paste, 19 parts by weight of polyvinyl acetate-ethylene emulsion, 2 parts by weight of vitrified micro bubbles, 0.08 part by weight of glass fiber, 0.28 part by weight of retarder and 0.3 part by weight of modified starch;
fully mixing the vitrified micro bubbles, 20 wt% of starch and aerogel paste to form a uniformly dispersed state to obtain an aerogel paste dispersoid;
step three, uniformly mixing the desulfurized gypsum clinker, 80 wt% of starch, glass fiber and a retarder;
step four, adding water and polyvinyl acetate-ethylene emulsion into the mixture prepared in the step three, and uniformly stirring to prepare gypsum slurry;
steps five to seven are the same as in example 1.
Comparative example 3 (preparation process was changed based on example 1)
The paper-faced gypsum board of this comparative example was prepared by the following method:
weighing 100 parts by weight of desulfurized gypsum clinker, 44 parts by weight of water, 2.67 parts by weight of aerogel paste, 19 parts by weight of polyvinyl acetate-ethylene emulsion, 2 parts by weight of vitrified micro bubbles, 0.08 part by weight of glass fiber, 0.28 part by weight of retarder and 0.3 part by weight of modified starch;
step two: adding polyvinyl acetate-ethylene emulsion and aerogel paste into water, and fully and uniformly mixing;
step three: uniformly mixing the desulfurized gypsum clinker, starch, glass fiber and vitrified micro bubbles;
step four: adding the mixture obtained in the step three into the mixed solution obtained in the step two to prepare gypsum slurry;
steps five to seven are the same as in example 1.
Comparative example 4
The common paper-surface gypsum board is purchased from the North New group building materials, inc. \28095TheState division, and has no emulsion and no aerogel paste in the core.
Comparative example 5 (without aerogel paste and vitrified micro bubbles)
The comparative example differs from example 1 in that: no aerogel paste or vitrified micro bubbles are added; the preparation method removes the step two of the example 1; in the third step, the desulfurized gypsum clinker, 100 percent by weight of starch, glass fiber and retarder are mixed uniformly; adding polyvinyl acetate-ethylene emulsion into the step four; the other steps are the same as in example 1.
COMPARATIVE EXAMPLE 6 (without aerogel Filler)
This comparative example differs from example 1 in that: the other formulations and procedures were the same as in example 1 without the addition of aerogel paste.
Comparative example 7 (without adding vitrified micro bubbles)
This comparative example differs from example 1 in that: the formulation and procedure were the same as in example 1 except that no vitrified small balls were added.
Test example 1
The gypsum plasterboards of the examples and the comparative examples are tested by referring to the Chinese national standard GB/T9775-2008 'gypsum plasterboard', and the physical and mechanical properties of the gypsum plasterboards are detected. The thermal conductivity of the gypsum board is detected according to GB/T10294-2008 'method for measuring steady-state thermal resistance of heat-insulating material and related characteristics of heat-shielding plate'. The test results are shown in table 1.
TABLE 1 Performance test results for paper-faced gypsum boards
As can be seen from Table 1, the paper-surface gypsum board prepared in the embodiment of the application can meet the requirements of Chinese national standard GB/T9775-2008 in terms of mechanical properties, and is excellent in heat insulation and fire resistance. Comparative examples 1 to 3 have little influence on the thermal conductivity of the paper-surface gypsum board without adding emulsion or changing the preparation process, but have great influence on the mechanical property and the fire resistance, the longitudinal and transverse breaking load and the fire stability of the paper-surface gypsum board are obviously reduced compared with those of the paper-surface gypsum board in example 1, and the comparative example 3 changes the preparation process of the paper-surface gypsum board, so that the bonding between the facing paper and the core material is unqualified, and the obtained paper-surface gypsum board cannot meet the use requirements. The gypsum board of comparative example 5 has no aerogel paste and vitrified micro bubbles, the mechanical property is reduced compared with the gypsum board of example 1, the heat insulation and fire resistance are obviously reduced compared with the gypsum board of example 1, although the gypsum board of comparative example 6 and comparative example 7 has limited effect by adding the aerogel paste or the vitrified micro bubbles alone, compared with the gypsum board of comparative example 5, the heat conductivity coefficient of the gypsum board can be reduced, and the stability time in fire is improved, the heat insulation and fire resistance are still obviously inferior to the paper-faced gypsum board of example 1, which shows that the aerogel paste and the vitrified micro bubbles have synergistic effect, so that the gypsum board has better heat insulation and fire resistance effects.
Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. 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 disclosure as defined by the appended claims.
Claims (8)
1. The heat-preservation and heat-insulation paper-surface gypsum board is characterized in that the preparation raw materials of the heat-preservation and heat-insulation paper-surface gypsum board comprise gypsum clinker, water, aerogel paste, ethylene-vinyl acetate copolymer emulsion, vitrified micro bubbles, glass fibers, a retarder and starch, wherein the addition amount of the gypsum clinker is 100 parts by weight, the addition amount of the water is 40-80 parts by weight, the addition amount of the aerogel paste based on the content of an effective component aerogel is 0.5-5 parts by weight, the addition amount of the ethylene-vinyl acetate copolymer emulsion is 5-20 parts by weight, the addition amount of the vitrified micro bubbles is 0.1-2 parts by weight, the addition amount of the glass fibers is 0.05-0.2 part by weight, the addition amount of the retarder is 0.2-1 part by weight, and the addition amount of the starch is 0.2-1 part by weight;
wherein the aerogel paste is used for water-based building materials.
2. The heat-insulating paper-surface gypsum board as claimed in claim 1, wherein the water is added in an amount of 60 to 80 parts by weight, the aerogel paste is added in an amount of 2 to 5 parts by weight based on the content of the aerogel as an active ingredient, the ethylene-vinyl acetate copolymer emulsion is added in an amount of 10 to 20 parts by weight, the vitrified beads are added in an amount of 0.1 to 2 parts by weight, the glass fibers are added in an amount of 0.08 to 0.2 parts by weight, the retarder is added in an amount of 0.2 to 1 part by weight, and the starch is added in an amount of 0.2 to 1 part by weight, based on 100 parts by weight of the gypsum clinker.
3. The heat-insulating paper-faced gypsum board as claimed in claim 1 or 2, wherein the aerogel content in the aerogel paste is greater than or equal to 30% by weight.
4. A thermal insulating paper-faced gypsum board according to claim 1 or 2, wherein the gypsum clinker is selected from any one or more of desulfurized gypsum clinker, phosphogypsum clinker and natural gypsum clinker.
5. The heat-insulating paper-faced gypsum board according to claim 1 or 2, wherein the glass fiber is selected from any one or more of medium alkali glass fiber, alkali-free glass fiber and alkali-resistant glass fiber.
6. The thermal insulating paper-faced gypsum board of claim 1 or 2, wherein the retarder is selected from any one or more of citric acid, sodium citrate, sodium hexametaphosphate, borax, and protein-based retarder.
7. The heat-insulating paper-faced gypsum board as claimed in claim 6, wherein the retarder is one or more selected from a bone glue protein retarder and a protein gypsum retarder obtained by calcium-calcifying degraded polyamide.
8. A method of making a heat-insulating paper-faced gypsum board according to any one of claims 1 to 7, comprising:
weighing gypsum clinker, water, aerogel paste, ethylene-vinyl acetate copolymer emulsion, vitrified micro bubbles, glass fiber, a retarder and starch in parts by weight;
step two, uniformly mixing the vitrified micro bubbles, a part of starch, the ethylene-vinyl acetate copolymer emulsion and the aerogel paste to obtain an aerogel paste dispersoid;
step three, uniformly mixing the gypsum clinker, the residual starch, the glass fiber and the retarder;
step four, adding water into the mixture obtained in the step three, and uniformly stirring to prepare gypsum slurry;
step five, adding the aerogel paste dispersoid obtained in the step two into the gypsum slurry obtained in the step four, and stirring to obtain slurry;
and step six, attaching upper and lower protective paper sheets to the slurry obtained in the step five, forming and drying to obtain the heat-preservation and heat-insulation paper-surface gypsum board.
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| CN113431256A (en) * | 2021-05-24 | 2021-09-24 | 北新集团建材股份有限公司 | Paper-surface gypsum board and preparation method thereof |
| CN113461404B (en) * | 2021-07-26 | 2023-03-24 | 西安墙体材料研究设计院有限公司 | SiO (silicon dioxide) 2 Aerogel-gypsum-based thermal insulation material and preparation method thereof |
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