CN111960787B - Paper-surface gypsum board and preparation method thereof - Google Patents
Paper-surface gypsum board and preparation method thereof Download PDFInfo
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- CN111960787B CN111960787B CN202010714605.2A CN202010714605A CN111960787B CN 111960787 B CN111960787 B CN 111960787B CN 202010714605 A CN202010714605 A CN 202010714605A CN 111960787 B CN111960787 B CN 111960787B
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0092—Machines or methods for applying the material to surfaces to form a permanent layer thereon to webs, sheets or the like, e.g. of paper, cardboard
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
- E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
- E04F13/0875—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements having a basic insulating layer and at least one covering layer
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F2290/00—Specially adapted covering, lining or flooring elements not otherwise provided for
- E04F2290/04—Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- Paper (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The paper-surface gypsum board comprises the following raw materials in parts by weight: 100 parts of gypsum clinker and 0.5-1.5 parts of impact-resistant material; the impact-resistant material is one or two of water-soluble fullerene or hydroxylated carbon nano-tube. The preparation method of the paper-surface gypsum board comprises the following steps: firstly, dissolving an impact-resistant material in water to prepare first slurry; secondly, adding gypsum clinker, a binder, fibers, modified starch, a water reducing agent, a foaming agent and water into the first slurry, and uniformly stirring to prepare second slurry; pouring the second slurry on the surface protecting paper again, and lapping, bonding and molding to prepare a wet plate; and finally, after the wet board is solidified, the wet board enters a dryer, and the paper-surface gypsum board is obtained after drying. The longitudinal and transverse fracture loads of the 12mm thick paper-faced gypsum board prepared based on the method are respectively improved by 55.5% and 72.7%, and the impact toughness is improved by 7.89 times.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a paper-surface gypsum board and a preparation method thereof, and particularly relates to a high-strength, high-toughness and impact-resistant paper-surface gypsum board.
Background
The paper-surface gypsum board is a building material with light weight, convenient processing, good performances of sound insulation, heat insulation, fire prevention and the like, and is mainly used for indoor partition walls and suspended ceilings.
But the gypsum board on the market at present is relatively poor in strength, very easy to brittle failure when being bent, and not good in toughness, and ordinary gypsum board is difficult to bear the external instant impact force, so that the board is easy to crack and even break.
Disclosure of Invention
The paper-faced gypsum board has high strength, high toughness and impact resistance, and has good impact resistance, and the mechanical property and the application range of the gypsum board are improved.
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 and 0.5-1.5 parts of impact-resistant material;
the impact-resistant material is one or two of water-soluble fullerene or hydroxylated carbon nano-tube.
In the paper-surface gypsum board provided by the invention, the board core comprises the following raw materials in parts by weight: 100 parts of gypsum clinker, 0.5-3 parts of binder, 0.2-1 part of fiber, 0.5-1.5 parts of impact-resistant material, 0.2-1.2 parts of starch, 0.5-1 part of water reducer and 0.01-0.05 part of foaming agent;
optionally, the paper-faced gypsum board is composed of the above components.
In the paper-surface gypsum board provided by the invention, the specific surface area of the gypsum clinker is 100-200m2The specific surface area is Boehringer specific surface area. The average particle diameter is 20-150 μm.
The gypsum is one or more of natural gypsum clinker, desulfurized gypsum clinker and phosphogypsum clinker.
In the paper-surface gypsum board provided by the invention, the water-soluble fullerene is C (n) OHX(n-60, 70, 76, 78, 82, 84).
In the paper-surface gypsum board provided by the invention, the binder is one or more of butylbenzene emulsion, styrene-acrylic emulsion, polyvinyl acetate emulsion, vinyl acetate-ethylene copolymer emulsion, vegetable gum, polyvinyl alcohol and epoxy resin;
optionally, the vegetable gum is selected from one or more of rosin gum, gum arabic and natural rubber.
In the paper-surface gypsum board provided by the invention, the fiber is one or more of glass fiber and modified natural fiber;
optionally, the glass fiber is chopped glass fiber with length of 4-8 cm;
optionally, the modified natural fiber has a diameter of 0.1 to 0.2mm and a length of 2 to 8 cm.
In the paper-surface gypsum board provided by the invention, the modified natural fiber is selected from one or more of modified hemp fiber, modified wood fiber, modified towel gourd fiber, modified coconut fiber and modified bamboo fiber;
in the paper-surface gypsum board provided by the invention, fibers are modified by adopting an alkali high-temperature cooking method. The alkali high-temperature steaming method is to boil dry natural fibers in high-temperature alkali liquor.
In the gypsum plaster board provided by the invention, the starch is selected from one or two of modified corn starch or modified cassava starch;
preferably, the viscosity of the starch is 1000-.
In the paper-surface gypsum board provided by the invention, the water reducing agent is one or more of a polycarboxylic acid water reducing agent or a naphthalene water reducing agent.
In the paper-surface gypsum board provided by the invention, the foaming agent is one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and fatty alcohol-polyoxyethylene ether sodium sulfate.
On the other hand, the invention provides a preparation method of the paper-surface gypsum board, which comprises the following steps:
(1) dissolving an impact-resistant material in part of water to prepare first slurry;
(2) adding gypsum clinker, a binder, fibers, modified starch, a water reducing agent, a foaming agent and the rest water into the first slurry, and uniformly stirring to prepare second slurry;
(3) pouring the second slurry on the surface protecting paper, and lapping, bonding and molding to prepare a wet plate;
(4) and (4) after the wet board is solidified, feeding the wet board into a dryer, and drying to obtain the gypsum plaster board.
Alternatively, the method of making the paper-faced gypsum board comprises only the above steps.
Optionally, in the step (4), the temperature of the first zone of the drying machine is 135-150 ℃, the temperature of the second zone is 120-130 ℃, and the temperature of the third zone is 90-100 DEG C
The synergistic effect of the anti-impact material, the fiber and the binder in the paper-surface gypsum board provided by the invention is beneficial to improving the strength and toughness of the gypsum board, and can obviously improve the impact resistance of the gypsum board. The longitudinal and transverse fracture loads of the 12mm thick paper-faced gypsum board prepared based on the method are respectively improved by 55.5% and 72.7%, and the impact toughness is improved by 7.89 times.
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.
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, 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 and 0.5-1.5 parts of impact-resistant material;
the impact-resistant material is one or two of water-soluble fullerene or hydroxylated carbon nano-tube.
In the embodiment of the invention, the board core comprises the following raw materials in parts by weight: 100 parts of gypsum clinker, 0.5-3 parts of binder, 0.2-1 part of fiber, 0.5-1.5 parts of impact-resistant material, 0.2-1.2 parts of starch, 0.5-1 part of water reducer and 0.01-0.05 part of foaming agent;
optionally, the paper-faced gypsum board is composed of the above components.
In the embodiment of the invention, the specific surface area of the gypsum clinker is 100-200m2The specific surface area is Boehringer specific surface area. The average particle diameter is 20-150 μm.
The gypsum is one or more of natural gypsum clinker, desulfurized gypsum clinker and phosphogypsum clinker.
In the embodiment of the invention, the water-soluble fullerene is C (n) OHX(n-60, 70, 76, 78, 82, 84).
In the embodiment of the invention, the binder is one or more of butylbenzene emulsion, styrene-acrylic emulsion, polyvinyl acetate emulsion, vinyl acetate-ethylene copolymer emulsion, vegetable gum, polyvinyl alcohol and epoxy resin;
optionally, the vegetable gum is selected from one or more of rosin gum, gum arabic and natural rubber.
In embodiments of the invention, the fibers are one or more of glass fibers and modified natural fibers;
optionally, the glass fiber is chopped glass fiber with length of 4-8 cm;
optionally, the modified natural fiber has a diameter of 0.1 to 0.2mm and a length of 2 to 8 cm.
In the embodiment of the invention, the modified natural fiber is selected from one or more of modified hemp fiber, modified wood fiber, modified loofah fiber, modified coconut fiber and modified bamboo fiber;
in the embodiment of the invention, the fibers are modified by adopting an alkali high-temperature cooking method. The alkali high-temperature steaming method is to boil dry natural fibers in high-temperature alkali liquor.
In an embodiment of the invention, the starch is selected from one or both of modified corn starch or modified tapioca starch;
preferably, the viscosity of the starch is 1000-.
In the embodiment of the invention, the water reducing agent is one or more of a polycarboxylic acid water reducing agent or a naphthalene water reducing agent.
In the embodiment of the invention, the foaming agent is one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and sodium fatty alcohol-polyoxyethylene ether sulfate.
Example 1
The paper-faced gypsum board in this example comprises the following components: 100 parts by weight of gypsum powder, 0.7 part by weight of binder, 0.4 part by weight of fiber, 0.5 part by weight of impact-resistant material, 0.3 part by weight of starch, 0.5 part by weight of water reducing agent, 0.02 part by weight of foaming agent and 67 parts by weight of water.
The gypsum powder is natural gypsum clinker powder with a specific surface area of 135m2Kg, average particle size 70 μm;
the impact-resistant material is fullerene C (60) OHXPurchased from Xiamen Keke chemical Co., Ltd, E311;
the binder is polyvinyl alcohol binder, which is purchased from Beijing Bailingwei science and technology company, 2488;
the fiber is glass fiber, and the glass fiber is 6cm short-cut glass fiber;
the starch is modified corn starch, the viscosity of the starch is 4300mPa & s, and the starch is purchased from east Asia building materials Co.Ltd of Jinzhou city;
the water reducing agent is a polycarboxylic acid water reducing agent which is purchased from SSF-4000 of Hubei mountain Tree wind building materials science and technology Limited company.
The foaming agent is sodium dodecyl benzene sulfonate which is purchased from Shanghai Aladdin Biotechnology Limited and is available in the S108366 brand.
The high strength, high toughness, impact resistant paper-faced gypsum board of this example was prepared by the following method:
(1) dissolving all impact-resistant materials in 10 parts by weight of water to prepare first slurry;
(2) adding gypsum clinker, a binder, fibers, modified starch, a water reducing agent, a foaming agent and the rest water into the first slurry, and uniformly stirring to prepare second slurry;
(3) pouring the second slurry on the surface protecting paper, and lapping, bonding and molding to prepare a wet plate;
(4) and after the wet board is solidified, the wet board enters a dryer, the temperature of a first area of the dryer is 135-plus-150 ℃, the temperature of a second area of the dryer is 120-plus-130 ℃, the temperature of a third area of the dryer is 90-100 ℃, and the dried gypsum board is subjected to edge cutting, sealing and packaging to obtain the high-strength, high-toughness and impact-resistant paper-surface gypsum board.
Example 2
The paper-faced gypsum board in this example comprises the following components: 100 parts by weight of gypsum powder, 1.4 parts by weight of binder, 0.6 part by weight of fiber, 1 part by weight of impact-resistant material, 0.5 part by weight of starch, 0.5 part by weight of water reducing agent, 0.03 part by weight of foaming agent and 72 parts by weight of water.
The gypsum powder is desulfurized gypsum clinker powder with the specific surface area of 152m2Kg, average particle size 80 μm;
the impact-resistant material is fullerene C (70) OHXFrom Kaina carbon New materials, Inc.;
the adhesive is an epoxy resin adhesive, and is purchased from the potentilla petrochemical, E-20;
the fiber is modified fibrilia, the modification method is to modify the fibrilia by an alkali high-temperature cooking method, the diameter of the fibrilia is 0.1mm, and the length of the fibrilia is 8 cm.
In this example, the alkali high-temperature steaming method is to pre-soak the dried hemp fiber in 7% (owf) NaOH (bath ratio 1:4.5), then heat the mixture of hemp fiber and NaOH to 120 ℃, and preserve the temperature for 30 min.
The raw material hemp fiber is purchased from Yiyi city lan mountain area Yisheng hemp rope product factory, 2.4.5 brand.
The starch is modified cassava starch, the viscosity of the starch is 4815mPa & s, and the starch is purchased from Hebei Shenpeng chemical company Limited under the designation 20190724;
the water reducing agent is a naphthalene water reducing agent and is purchased from Shenyang Xingzheng and chemical industry Co., Ltd, SNF-C.
The foaming agent is sodium dodecyl sulfate, which is purchased from Jinan cloud chemical Co., Ltd., k 12.
The thistle board of this example was prepared in the same manner as in example 1.
Example 3
The paper-faced gypsum board in this example comprises the following components: 100 parts by weight of gypsum powder, 2 parts by weight of binder, 0.8 part by weight of fiber, 1.2 parts by weight of impact-resistant material, 0.7 part by weight of starch, 0.6 part by weight of water reducing agent, 0.03 part by weight of foaming agent and 68 parts by weight of water.
The gypsum powder is desulfurized gypsum clinker powder with the specific surface area of 152m2Kg, average particle size 80 μm;
the impact-resistant material is fullerene C (60) OHXPurchased from Xiamen Keke chemical Co., Ltd, E311;
the binder is gum arabic adhesive, purchased from north Hebei Xushi beeswax GmbH, kibble;
the fiber is modified bamboo fiber, the modification method is to modify the fiber by an alkali high-temperature cooking method, the diameter of the bamboo fiber is 0.2mm, and the length of the bamboo fiber is 8 cm.
In this embodiment, the alkali high-temperature steaming method includes pre-soaking dried bamboo fiber in 7% (owf) NaOH (bath ratio 1:4.5), heating the mixed solution of bamboo fiber and NaOH to 120 ℃, and keeping the temperature for 30 min.
The raw bamboo fiber was purchased from Shandong Xuzhen textile Co., Ltd, No. 45456456.
The starch is modified cassava starch, the viscosity of the starch is 4815mPa & s, and the starch is purchased from Hebei Shenpeng chemical company Limited under the designation 20190724;
the water reducing agent is a naphthalene water reducing agent and is purchased from Shenyang Xingzheng and chemical industry Co., Ltd, SNF-C.
The foaming agent is sodium dodecyl sulfate which is purchased from Jinan Yunfei chemical Co., Ltd, and is available under the mark of k 12.
The thistle board of this example was prepared in the same manner as in example 1.
Example 4
The paper-faced gypsum board in the embodiment comprises the following components: 100 parts by weight of gypsum powder, 3 parts by weight of binder, 1 part by weight of fiber, 1.5 parts by weight of impact-resistant material, 0.5 part by weight of modified starch, 0.7 part by weight of water reducing agent, 0.05 part by weight of foaming agent and 70 parts by weight of water.
The gypsum powder is phosphogypsum clinker powder with a specific surface area of 135m2Kg, average particle size 70 μm;
the impact resistant material is a hydroxyl carbon nano tube which is purchased from the Suzhou constant-ball graphene Co., Ltd, 006-5H;
the binder is polyvinyl acetate emulsion, available from selanies, 8482;
the fiber is glass fiber, and the glass fiber is 6cm short-cut glass fiber;
the starch is modified corn starch, the viscosity of the starch is 4300mPa & s, and the starch is purchased from east Asia building materials Co.Ltd of Jinzhou city;
the water reducing agent is a polycarboxylic acid water reducing agent which is purchased from SSF-4000 of Hubei mountain Tree wind building materials science and technology Limited company.
The foaming agent is sodium dodecyl benzene sulfonate and is purchased from Shanghai Aladdin Biotechnology limited company S108366.
The thistle board of this example was prepared in the same manner as in example 1.
Comparative example 1
This comparative example differs from example 1 only in that: the paper-surface gypsum board is not added with fullerene. The remaining components and preparation were the same as in example 1.
Comparative example 2
This comparative example differs from example 1 only in that: the paper-surface gypsum board is not added with fullerene, binder and fiber. The remaining components and preparation were the same as in example 1.
Comparative example 3
This comparative example differs from example 1 only in that: the addition amount of the fullerene in the paper-surface gypsum board is 2 parts by weight. The remaining components and preparation were the same as in example 1.
Comparative example 4
This comparative example differs from example 1 only in that: the fullerene is replaced by the hydroxylated graphene, and the dosage of the hydroxylated graphene is the same as that of the fullerene. The remaining components and preparation were the same as in example 1.
The hydroxylated graphene is purchased from suzhou carbofeng graphene technologies ltd under the designation TF-12141.
Performance testing
The performance of the 12mm thick paper-faced gypsum boards prepared in examples 1-3 and comparative examples 1-4 was tested according to the method specified in the Chinese national standard GB/T9775-2008. The test results are shown in table 1 below.
TABLE 1 Effect of the embodiment
The impact resistance appearance effect of examples 1 to 4 was no crack, and the impact resistance appearance effect of comparative examples 1 to 4 was slight crack.
The test result shows that the high-strength, high-toughness and impact-resistant gypsum plaster board provided by the invention has obviously improved fracture load, shearing force and impact resistance compared with the common gypsum plaster board.
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 (14)
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, 0.5-1.5 parts of impact-resistant material, 0.5-3 parts of binder, 0.2-1 part of fiber, 0.2-1.2 parts of starch, 0.5-1 part of water reducer and 0.01-0.05 part of foaming agent;
the impact-resistant material is one or two of water-soluble fullerene or hydroxylated carbon nano-tube.
2. The gypsum plasterboard of claim 1, wherein the water reducing agent is one or more of a polycarboxylic acid water reducing agent or a naphthalene based water reducing agent.
3. The gypsum plaster board of claim 1, wherein the gypsum clinker has a specific surface area of 100-200m2Per kg, the average particle diameter is 20-150 μm.
4. Paper plaster as claimed in claim 1A plate, wherein the water-soluble fullerene is C (n) OHX(n =60, 70, 76, 78, 82, 84).
5. The gypsum plasterboard of any one of claims 1 to 3, wherein the binder is one or more of a styrene-butadiene emulsion, a styrene-acrylic emulsion, a polyvinyl acetate emulsion, a vinyl acetate-ethylene copolymer emulsion, a vegetable gum, a polyvinyl alcohol, an epoxy resin.
6. The paper-faced gypsum board of claim 5, wherein the vegetable gum is selected from one or more of rosin gum, gum arabic, and natural rubber.
7. The gypsum plasterboard of any one of claims 1 to 4, wherein the fibres are one or more of glass fibres and modified natural fibres.
8. The gypsum plasterboard of claim 7, wherein the glass fibres are chopped glass fibres having a length of 4-8 cm.
9. The gypsum plasterboard of claim 7, wherein the modified natural fibres have a diameter of 0.1-0.2mm and a length of 2-8 cm.
10. The gypsum plasterboard of claim 7, wherein the modified natural fibres are selected from one or more of modified hemp fibres, modified wood fibres, modified loofah fibres, modified coconut fibres and modified bamboo fibres;
the modification method of the modified natural fiber comprises the following steps: and modifying the fiber by adopting an alkali high-temperature cooking method.
11. The gypsum plasterboard of any one of claims 1 to 4, wherein the starch is selected from one or both of modified corn starch or modified tapioca starch.
12. The gypsum plasterboard of claim 11, wherein the starch has a viscosity of 1000-.
13. The gypsum plasterboard of any one of claims 1 to 4, wherein the foaming agent is one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and sodium fatty alcohol ether sulfate.
14. A method of making the paper-faced gypsum board of any one of claims 1 to 13, comprising the steps of:
(1) dissolving an impact-resistant material in part of water to prepare first slurry;
(2) adding gypsum clinker, a binder, fibers, modified starch, a water reducing agent, a foaming agent and the rest water into the first slurry, and uniformly stirring to prepare second slurry;
(3) pouring the second slurry on the surface protecting paper, and lapping, bonding and molding to prepare a wet plate;
(4) and (4) after the wet board is solidified, feeding the wet board into a dryer, and drying to obtain the gypsum plaster board.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010714605.2A CN111960787B (en) | 2020-07-23 | 2020-07-23 | Paper-surface gypsum board and preparation method thereof |
| PCT/CN2021/106999 WO2022017302A1 (en) | 2020-07-23 | 2021-07-19 | Paper faced gypsum board and preparation method therefor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010714605.2A CN111960787B (en) | 2020-07-23 | 2020-07-23 | Paper-surface gypsum board and preparation method thereof |
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| CN111960787B true CN111960787B (en) | 2022-01-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111960787B (en) * | 2020-07-23 | 2022-01-07 | 中建材创新科技研究院有限公司 | Paper-surface gypsum board and preparation method thereof |
| CN113582646A (en) * | 2021-06-21 | 2021-11-02 | 北新集团建材股份有限公司 | Light high-strength paper-surface gypsum board and preparation method thereof |
| CN113829694A (en) * | 2021-09-10 | 2021-12-24 | 北新集团建材股份有限公司 | Paper-surface gypsum board and preparation method thereof |
| CN114380566A (en) * | 2021-12-22 | 2022-04-22 | 中建材创新科技研究院有限公司 | Water-resistant high-strength paper-surface gypsum board and preparation method thereof |
| CN114180921B (en) * | 2021-12-24 | 2023-03-14 | 泰山石膏有限公司 | High-strength high-toughness damp-proof water-resistant biomass fiber gypsum base plate and preparation method thereof |
| CN114536927A (en) * | 2022-02-09 | 2022-05-27 | 龙剑萍 | Anti-crack gypsum board |
| CN114905808B (en) * | 2022-04-22 | 2023-04-07 | 醴陵千汇实业有限公司 | Paper-surface gypsum board and preparation method thereof |
| CN116425496B (en) * | 2023-03-17 | 2024-04-19 | 泰山石膏（江阴）有限公司 | High-strength gypsum-based fiber board and preparation method thereof |
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| CN111960787B (en) * | 2020-07-23 | 2022-01-07 | 中建材创新科技研究院有限公司 | Paper-surface gypsum board and preparation method thereof |
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2020
- 2020-07-23 CN CN202010714605.2A patent/CN111960787B/en active Active
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2021
- 2021-07-19 WO PCT/CN2021/106999 patent/WO2022017302A1/en active Application Filing
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| CN102718460A (en) * | 2012-06-26 | 2012-10-10 | 大连理工大学 | Electromagnetic wave absorbing gypsum board |
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| WO2022017302A1 (en) | 2022-01-27 |
| CN111960787A (en) | 2020-11-20 |
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