Gypsum plaster board and preparation method thereof

Abstract

The invention discloses a gypsum plaster board and a preparation method thereof. The gypsum plaster board is prepared from the following raw materials: building gypsum powder, water, glass fibers, wood fibers, modified starch, a foaming agent, a water-based emulsion, a water reducing agent, edge bonding glue, a crystal form regulator, a coagulation accelerator and high-strength surface protection paper. The nail-holding power and the shearing force of the gypsum board are effectively improved on the whole.

Description

Technical Field

[0001] This document relates to the field of building materials, and particularly to a gypsum board with paper facing and its preparation method. Background Art

[0002] During the use of gypsum boards, due to the influence of the gypsum board material, problems such as unstable nail holding or piercing often occur after nailing, resulting in easy detachment of the gypsum board, seriously affecting the performance of the product. In this case, by adding special fibers, emulsions and other measures to the gypsum board production formula and supporting production processes, the gypsum board has high nail holding force and high shear force during use. Summary of the Invention

[0003] The following is an overview of the subject matter described in detail in this document. This overview is not intended to limit the scope of protection of this application.

[0004] In a first aspect of this application, a gypsum board with paper facing is provided. The raw materials of the gypsum board with paper facing include: building gypsum powder, water, glass fiber, wood fiber, modified starch, foaming agent, water-based emulsion, water reducing agent, edge adhesive, crystal form regulator, coagulant, and high-strength facing paper.

[0005] In an exemplary embodiment, the raw materials of the gypsum board with paper facing may further include other additives well-known in the art.

[0006] In an exemplary embodiment, the raw materials of the gypsum board with paper facing, by weight, include: 6500 - 7000 parts by weight of building gypsum powder, 3500 - 4000 parts by weight of water, 80 - 100 parts by weight of glass fiber, 250 - 400 parts by weight of wood fiber, 10 - 20 parts by weight of modified starch, 1 - 5 parts by weight of foaming agent, 200 - 300 parts by weight of water-based emulsion, 40 - 70 parts by weight of water reducing agent, 3 - 6 parts by weight of edge adhesive, 5 - 10 parts by weight of crystal form regulator, 50 - 150 parts by weight of coagulant, and 300 - 500 parts by weight of high-strength facing paper.

[0007] In an exemplary embodiment, the raw materials of the gypsum board with paper facing, by weight, consist of: 6500 - 7000 parts by weight of building gypsum powder, 3500 - 4000 parts by weight of water, 80 - 100 parts by weight of glass fiber, 250 - 400 parts by weight of wood fiber, 10 - 20 parts by weight of modified starch, 1 - 5 parts by weight of foaming agent, 200 - 300 parts by weight of water-based emulsion, 40 - 70 parts by weight of water reducing agent, 3 - 6 parts by weight of edge adhesive, 5 - 10 parts by weight of crystal form regulator, 50 - 150 parts by weight of coagulant, and 300 - 500 parts by weight of high-strength facing paper.

[0008] In an exemplary embodiment, the glass fiber is chopped glass fiber with a length of 6 - 15 mm.

[0009] In an exemplary embodiment, the length of the wood fiber is 0.5 - 3 mm; optionally, the length of the wood fiber is 0.906 ± 0.1 mm.

[0010] In an exemplary embodiment, the blowing agent is an aqueous blowing agent; optionally, the blowing agent is an anionic surfactant.

[0011] In an exemplary embodiment, the aqueous emulsion is selected from any one or more of acrylic aqueous emulsions, vinyl acetate homopolymer emulsions, and styrene - butadiene emulsions; optionally, the aqueous emulsion is a vinyl acetate homopolymer emulsion.

[0012] In an exemplary embodiment, the water - reducing agent is selected from one or more of naphthalene - based water - reducing agents, aliphatic water - reducing agents, polycarboxylate water - reducing agents, polyether - type water - reducing agents, and amino - sulfonic - acid - based water - reducing agents; optionally, the water - reducing agent is a polyether - type water - reducing agent.

[0013] In an exemplary embodiment, the crystal form regulator is at least one of phosphate and tartaric acid compounds; optionally, the crystal form regulator is phosphate; preferably, the crystal form regulator is sodium trimetaphosphate.

[0014] In an exemplary embodiment, the coagulant is selected from at least one of ammonium sulfate, potassium sulfate, sodium sulfate, and calcium sulfate dihydrate; optionally, the coagulant is calcium sulfate dihydrate.

[0015] In an exemplary embodiment, the edge - sticking glue is a special white latex for gypsum board, for example, the special white latex for gypsum board purchased from Shandong Shenling New Building Materials Co., Ltd.

[0016] In an exemplary embodiment, the raw materials of the paper - faced gypsum board, by weight, include: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 400 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of blowing agent, 300 parts by weight of aqueous emulsion, 50 parts by weight of water - reducing agent, 3 parts by weight of edge - sticking glue, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant, and 420 parts by weight of high - strength facing paper.

[0017] In an exemplary embodiment, the raw materials of the gypsum plasterboard include, by weight: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 325 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 300 parts by weight of aqueous emulsion, 50 parts by weight of water reducing agent, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant accelerator, and 420 parts by weight of high-strength facing paper.

[0018] In an exemplary embodiment, the raw materials of the gypsum plasterboard include, by weight: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 250 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 300 parts by weight of aqueous emulsion, 50 parts by weight of water reducing agent, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant accelerator, and 420 parts by weight of high-strength facing paper.

[0019] In an exemplary embodiment, the raw materials of the gypsum plasterboard include, by weight: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 400 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 250 parts by weight of aqueous emulsion, 50 parts by weight of water reducing agent, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant accelerator, and 420 parts by weight of high-strength facing paper.

[0020] In an exemplary embodiment, the raw materials of the gypsum plasterboard include, by weight: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 400 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 200 parts by weight of aqueous emulsion, 50 parts by weight of water reducing agent, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant accelerator, and 420 parts by weight of high-strength facing paper.

[0021] In an exemplary embodiment, the gypsum plasterboard has a nail-holding force > 600N and a shear force > 800N.

[0022] The second aspect of the present application provides a method for preparing the above gypsum plasterboard, including the following steps: According to the ratio, mix building gypsum powder, water, glass fiber, wood fiber, modified starch, foaming agent, aqueous emulsion, water reducing agent, crystal form regulator, and coagulant accelerator evenly to obtain a slurry. Lay the slurry on the high-strength facing paper, bond the edges of the facing paper with edge adhesive, and obtain a semi-finished product through extrusion molding, hardening, and cutting. After drying the semi-finished product, a gypsum plasterboard with high nail-holding force and high shear force is obtained.

[0023] In an exemplary embodiment, the drying includes: Stage 1, drying at 105 - 115°C for 20 - 28 minutes; Stage 2, drying at 110 - 120°C for 16 - 24 minutes; Stage 3, drying at 105 - 115°C for 20 - 28 minutes; Stage 4, drying at 95 - 105°C for 24 - 32 minutes.

[0024] The third aspect of the present application provides a gypsum board for paper face prepared by the above - mentioned preparation method of the gypsum board for paper face.

[0025] Compared with the related technology, the gypsum board of the present application has the following technical effects: ① The nail - holding force measured according to GB / T 17657 - 2022 > 600N, ② The shear force measured according to GB / T 9775 - 2008 > 800N.

[0026] Overall, the present application effectively improves the problem that the gypsum board is prone to fall off during use due to low nail - holding force and shear force.

[0027] Other features and advantages of the present application will be described in the subsequent specification, and some will be obvious from the specification or understood by implementing the present application. Other advantages of the present application can be achieved and obtained through the solutions described in the specification. Detailed Embodiments

[0028] To make the purpose, technical solutions and advantages of the present application clearer and more understandable, the embodiments of the present application will be described in detail below. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0029] The embodiment of the present application provides a gypsum board for paper face, and the raw materials of the gypsum board for paper face include: building gypsum powder, water, glass fiber, wood fiber, modified starch, foaming agent, water - based emulsion, water - reducing agent, edge - sticking glue, crystal form regulator, coagulation promoter, high - strength face paper.

[0030] In the embodiment of the present application, the raw materials of the gypsum board for paper face may further include other additives well - known in the art.

[0031] In the embodiments of the present application, the raw materials of the gypsum board with paper face, by weight, include: 6500 - 7000 parts by weight of building gypsum powder, 3500 - 4000 parts by weight of water, 80 - 100 parts by weight of glass fiber, 250 - 400 parts by weight of wood fiber, 10 - 20 parts by weight of modified starch, 1 - 5 parts by weight of foaming agent, 200 - 300 parts by weight of water-based emulsion, 40 - 70 parts by weight of water reducing agent, 3 - 6 parts by weight of edge-bonding glue, 5 - 10 parts by weight of crystal form regulator, 50 - 150 parts by weight of coagulant accelerator, and 300 - 500 parts by weight of high-strength facing paper.

[0032] In the embodiments of the present application, the glass fiber is chopped glass fiber with a length of 6 - 15 mm.

[0033] In the embodiments of the present application, the length of the wood fiber is 0.5 - 3 mm; optionally, the length of the wood fiber is 0.906 ± 0.1 mm.

[0034] In the embodiments of the present application, the foaming agent is a water-based foaming agent; optionally, the foaming agent is an anionic surfactant.

[0035] In the embodiments of the present application, the water-based emulsion is selected from any one or more of acrylic water-based emulsion, vinyl acetate homopolymer emulsion, and styrene-butadiene emulsion; optionally, the water-based emulsion is vinyl acetate homopolymer emulsion.

[0036] In the embodiments of the present application, the water reducing agent is selected from one or more of naphthalene-based water reducing agent, aliphatic water reducing agent, polycarboxylate water reducing agent, polyether-type water reducing agent, and amino sulfonate water reducing agent; optionally, the water reducing agent is polyether-type water reducing agent.

[0037] In the embodiments of the present application, the crystal form regulator is at least one of phosphate and tartaric acid compound; optionally, the crystal form regulator is phosphate; preferably, the crystal form regulator is sodium tripolyphosphate.

[0038] In the embodiments of the present application, the coagulant accelerator is selected from at least one of ammonium sulfate, potassium sulfate, sodium sulfate, and calcium sulfate dihydrate; optionally, the coagulant accelerator is calcium sulfate dihydrate.

[0039] In the embodiments of the present application, the edge-bonding glue is a special white latex for gypsum board, for example, the special white latex for gypsum board purchased from Shandong Shenling New Building Materials Co., Ltd.

[0040] In the embodiments of the present application, the nail-holding force of the gypsum board with paper face > 600 N, and the shear force > 800 N.

[0041] The embodiments of the present application also provide a preparation method of the above-mentioned gypsum board with paper face, including the following steps: According to the ratio, mix building gypsum powder, water, glass fiber, wood fiber, modified starch, foaming agent, water-based emulsion, water reducer, crystal form regulator, and setting accelerator evenly to obtain a slurry. Lay the slurry on high-strength facing paper, bond the edges of the facing paper with edge adhesive, and obtain a semi-finished product through extrusion molding, hardening, and cutting. After drying the semi-finished product, a gypsum board with high nail-holding power and high shear strength is obtained.

[0042] In the embodiment of the present application, the drying includes: Stage 1, drying at 105 - 115 °C for 20 - 28 minutes; Stage 2, drying at 110 - 120 °C for 16 - 24 minutes; Stage 3, drying at 105 - 115 °C for 20 - 28 minutes; Stage 4, drying at 95 - 105 °C for 24 - 32 minutes.

[0043] The embodiment of the present application also provides a gypsum board prepared by the above preparation method of the gypsum board.

[0044] The following further describes the present invention in detail with specific examples, but these examples should not be construed as limiting the present invention.

[0045] In the comparative examples and examples of the present application: The glass fiber is purchased from Taishan Fiberglass Co., Ltd., with the model TCR101H - 16 - 12 and the chopped length of 12.0 mm; The wood fiber is purchased from Wen'an Zhengtai Wood Cellulose Factory, and the length of the wood fiber is 0.906 ± 0.1 mm; The modified starch is purchased from Shenyang Xuegong Adhesive Technology Co., Ltd., which is special starch for gypsum board; The foaming agent is purchased from Shanghai Kao Corporation, with the model MIGHTY FA - 201; The water-based emulsion is vinyl acetate homopolymer, purchased from Celanese (Shanghai) International Trading Co., Ltd., with the model Vinamul 8482 CN; The water reducer is purchased from BASF (China) Co., Ltd., with the model Melflux plus 1087L; The crystal form regulator is sodium trimetaphosphate, purchased from Xuzhou Tianjia Edible Chemical Co., Ltd.; The setting accelerator is Ca2SO4·2H2O, which is made by crushing and grinding gypsum board; The edge adhesive is special white latex for gypsum board, purchased from Shandong Shenling New Building Materials Co., Ltd.; The high-strength facing paper is purchased from Shanxi Qiangwei Paper Co., Ltd., with a weight of 210 g / m 2 ; The building gypsum powder is the building gypsum that complies with GB / T9776 - 2022.

[0046] In the following specific embodiments, operations not specified with conditions are carried out under conventional conditions or conditions recommended by the manufacturer. Raw materials not specified with manufacturers and specifications are all conventional products that can be obtained through market purchases.

[0047] Example 1. The raw materials of the gypsum plasterboard include: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 400 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 300 parts by weight of water-based emulsion, 50 parts by weight of water reducing agent, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant, and 420 parts by weight of high-strength facing paper.

[0048] The preparation method of the gypsum plasterboard includes the following steps: According to the ratio, mix the building gypsum powder, water, glass fiber, wood fiber, modified starch, foaming agent, water-based emulsion, water reducing agent, crystal form regulator, and coagulant evenly to obtain a slurry. Lay the slurry on the high-strength facing paper, bond the edges of the facing paper with the edge adhesive, and obtain a semi-finished product through extrusion molding, hardening, and cutting. After drying the semi-finished product, a gypsum plasterboard with high nail-holding force and high shear force is obtained; wherein, the drying includes: Stage 1, drying at 105 - 115 °C for 20 - 28 minutes; Stage 2, drying at 110 - 120 °C for 16 - 24 minutes; Stage 3, drying at 105 - 115 °C for 20 - 28 minutes; Stage 4, drying at 95 - 105 °C for 24 - 32 minutes.

[0049] Example 2. The raw materials of the gypsum plasterboard include: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 325 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 300 parts by weight of water-based emulsion, 50 parts by weight of water reducing agent, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant, and 420 parts by weight of high-strength facing paper.

[0050] The preparation method of the gypsum plasterboard is the same as that of Example 1.

[0051] Example 3. The raw materials of the gypsum plasterboard include: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 250 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 300 parts by weight of water-based emulsion, 50 parts by weight of water reducing agent, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant, and 420 parts by weight of high-strength facing paper.

[0052] The preparation method of the gypsum plasterboard is the same as that in Example 1.

[0053] Example 4. The raw materials of the gypsum plasterboard include: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 400 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 250 parts by weight of water-based emulsion, 50 parts by weight of water reducer, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant, and 420 parts by weight of high-strength facing paper.

[0054] The preparation method of the gypsum plasterboard is the same as that in Example 1.

[0055] Example 5. The raw materials of the gypsum plasterboard include: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 400 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 200 parts by weight of water-based emulsion, 50 parts by weight of water reducer, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant, and 420 parts by weight of high-strength facing paper.

[0056] The preparation method of the gypsum plasterboard is the same as that in Example 1.

[0057] Comparative Example 1: The raw materials of the gypsum plasterboard include: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 400 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 100 parts by weight of water-based emulsion, 50 parts by weight of water reducer, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant, and 420 parts by weight of high-strength facing paper.

[0058] The preparation method of the gypsum plasterboard is the same as that in Example 1.

[0059] Comparative Example 2: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 400 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 50 parts by weight of water reducer, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant, and 420 parts by weight of high-strength facing paper.

[0060] The preparation method of the gypsum plasterboard is the same as that in Example 1.

[0061] Comparative Example 3: 7,000 parts by weight of building gypsum powder, 4,000 parts by weight of water, 100 parts by weight of glass fiber, 150 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 300 parts by weight of water-based emulsion, 50 parts by weight of water reducing agent, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant, 420 parts by weight of high-strength facing paper.

[0062] The preparation method of the gypsum board with paper facing is the same as that in Example 1.

[0063] Comparative Example 4: 7,000 parts by weight of building gypsum powder, 4,000 parts by weight of water, 100 parts by weight of glass fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 300 parts by weight of water-based emulsion, 50 parts by weight of water reducing agent, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant, 420 parts by weight of high-strength facing paper.

[0064] The preparation method of the gypsum board with paper facing is the same as that in Example 1.

[0065] Comparative Example 5. Taishan high-strength gypsum-based fire retardant board.

[0066] Test: 1. Test the nail-holding force and shear force of the products in the examples and comparative examples. The standards and results are shown in Table 1.

[0067] Table 1 2. Test other properties of the products in the examples and comparative examples. The test results and standards are shown in Table 2.

[0068] Table 2 As can be seen from Table 1 and Table 2, the gypsum board of the present application has the following technical effects: ① The nail-holding force measured according to GB / T 17657-2022 > 600 N; ② The shear force measured according to GB / T 9775-2008 > 800 N (wherein, the shear force is a resistance perpendicular to the acting surface). This may be because the shear force and nail-holding force of the gypsum board are effectively improved by adding wood fiber and water-based emulsion, wherein: In terms of improving the nail-holding force: 1) Wood fiber can form a three-dimensional network structure in the gypsum board core. When the gypsum is subjected to external force (such as the stress when the nail is pulled out), the fiber can delay the cracking of the gypsum, maintain the integrity of the material, reduce the cracking of the gypsum around the nail, and improve the nail-holding force of the gypsum board; 2) Gypsum is inherently brittle. The addition of wood fibers absorbs energy through plastic deformation, changing the material from brittle fracture to ductile failure mode. When pulling out a nail, the stretching and slipping of the fibers consume additional energy, thus increasing the nail withdrawal resistance (nail-holding force). 3) As a polymer, the aqueous emulsion forms an interpenetrating network structure after mixing with gypsum. This structure can effectively disperse the stress generated during nailing, reduce the brittle fracture of the gypsum matrix, and enhance the nail-holding force.

[0069] In terms of enhancing the shear force: 1) Wood fibers are dispersed in the gypsum board core. When the material is subjected to shear force, the fibers are combined with the gypsum matrix through the interface to effectively transfer the stress. When a crack propagates, the fibers form a "bridge" across both sides of the acting force, enhancing the shear strength. Fibers with a relatively high length are staggered in the gypsum board core to form a three-dimensional network, enhancing the overall structural stability and resisting shear deformation.

[0070] 2) After being dispersed in the gypsum slurry, the aqueous emulsion resin dries to form a polymer film that wraps and bridges the gypsum crystals (calcium sulfate dihydrate). This polymer network enhances the bonding force between gypsum particles, making the structure more compact. The polymer film and the gypsum crystals are intertwined, maintaining both the rigidity of the gypsum and introducing the toughness of the resin, thus optimizing the performance. Thereby, the shear mechanical properties of the gypsum board are enhanced. The combined use of wood fibers and the aqueous emulsion is beneficial to improving the nail-holding force and shear force of the gypsum board.

[0071] In summary, the present application effectively improves the problem that the gypsum board is prone to falling off during use due to low nail-holding force and shear force.

[0072] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A gypsum plasterboard, wherein, The raw materials of the paper-faced gypsum board include, by weight: 6500-7000 parts of building gypsum powder, 3500-4000 parts of water, 80-100 parts of glass fiber, 250-400 parts of wood fiber, 10-20 parts of modified starch, 1-5 parts of foaming agent, 200-300 parts of aqueous emulsion, 40-70 parts of water reducing agent, 3-6 parts of edge adhesive, 5-10 parts of crystal form regulator, 50-150 parts of coagulant, and 300-500 parts of high-strength face paper.

2. The gypsum plasterboard according to claim 1, wherein, The glass fibers are chopped glass fibers with a length of 6-15 mm; and / or The length of the wood fiber is 0.5-3 mm.

3. The paper-faced gypsum board according to claim 1 or 2, wherein, The aqueous emulsion is selected from any one or more of an acrylic aqueous emulsion, a vinyl acetate homopolymer emulsion and a styrene-butadiene emulsion; and / or The water reducer is selected from one or more of naphthalene-based water reducers, aliphatic-based water reducers, polycarboxylic acid-based water reducers, polyether-type water reducers and aminosulfonic acid-based water reducers; and / or The crystal form modifier is at least one of a phosphate and a tartaric acid compound; and / or The coagulant is selected from at least one of ammonium sulfate, potassium sulfate, sodium sulfate and calcium sulfate dihydrate.

4. The gypsum plasterboard according to claim 1 or 2, wherein The foaming agent is an aqueous foaming agent.

5. The gypsum plasterboard according to claim 3, wherein, The foaming agent is an anionic surfactant.

6. The gypsum plasterboard according to claim 1 or 2, wherein The raw materials of the paper-faced gypsum board include, by weight: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 400 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 300 parts by weight of aqueous emulsion, 50 parts by weight of water reducing agent, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of accelerator, and 420 parts by weight of high-strength face paper; or The raw materials of the paper-faced gypsum board include, by weight: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 325 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 300 parts by weight of aqueous emulsion, 50 parts by weight of water reducing agent, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant, and 420 parts by weight of high-strength face paper; or The raw materials of the paper-faced gypsum board include, by weight: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 250 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 300 parts by weight of aqueous emulsion, 50 parts by weight of water reducing agent, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of accelerator, and 420 parts by weight of high-strength face paper; or The raw materials of the paper-faced gypsum board include, by weight: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 400 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 250 parts by weight of aqueous emulsion, 50 parts by weight of water reducing agent, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant, and 420 parts by weight of high-strength face paper; or The raw materials of the paper-faced gypsum board include, by weight: 7000 parts by weight of building gypsum powder, 4000 parts by weight of water, 100 parts by weight of glass fiber, 400 parts by weight of wood fiber, 15 parts by weight of modified starch, 3 parts by weight of foaming agent, 200 parts by weight of aqueous emulsion, 50 parts by weight of water reducing agent, 3 parts by weight of edge adhesive, 6 parts by weight of crystal form regulator, 100 parts by weight of coagulant, and 420 parts by weight of high-strength face paper.

7. The gypsum plasterboard according to claim 1 or 2, wherein The nail holding force of the gypsum board is greater than 600N, and the shearing force is greater than 800N.

8. A method for preparing the gypsum board according to any one of claims 1 to 7, comprising the following steps: According to the proportion, building gypsum powder, water, glass fiber, wood fiber, modified starch, foaming agent, aqueous emulsion, water reducing agent, crystal form regulator and coagulant are evenly mixed to obtain slurry, the slurry is laid on high-strength facing paper, the edge of the facing paper is glued with edge adhesive, and a semi-finished product is obtained through extrusion molding, hardening and cutting, and the semi-finished product is dried to obtain a paper-faced gypsum board with high nail holding force and high shear force.

9. The preparation method according to claim 8, wherein, The drying comprises: stage one, drying at 105-115° C. for 20-28 minutes; stage two, drying at 110-120° C. for 16-24 minutes; stage three, drying at 105-115° C. for 20-28 minutes; stage four, drying at 95-105° C. for 24-32 minutes.

10. A gypsum board prepared by the method of claim 8 or 9.

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