Anti-bending gypsum plaster board and preparation method thereof

Abstract

The invention relates to the technical field of gypsum boards, in particular to a flexural-resistant gypsum plaster board and a preparation method thereof.The flexural-resistant gypsum plaster board is prepared from a gypsum board core material and surface protection paper, and the gypsum board core material is prepared from, by weight, 100-110 parts of calcined gypsum, 7-11 parts of a combined balance blender, 4-7 parts of auxiliary additives, 0.4-0.6 part of a foaming agent, 2-4 parts of a water reducing agent, 2-4 parts of starch and 50-60 parts of water. According to the gypsum plaster board, the calcined gypsum, the foaming agent, the water reducing agent, the starch and other raw materials are matched, meanwhile, the combined balance blender and the matched additives are added to serve as blending and blending raw materials, through the blending and synergistic effect of the raw materials, the strength, the bending resistance and the heat preservation performance of the product are improved in a coordinated and balanced mode, and meanwhile the temperature change resistance stability effect of the product is remarkable.

Description

Technical Field

[0001] The invention relates to the technical field of gypsum boards, and in particular to a deflection-resistant paper-faced gypsum board and a preparation method thereof. Background Art

[0002] Gypsum board is a material made of building gypsum as the main raw material. It is a building material with light weight, high strength, thin thickness, easy processing, and good sound insulation, heat insulation and fire resistance. It is one of the new lightweight panels that are currently being developed. Paper-faced gypsum board is a panel made of gypsum as the main raw material, mixed with an appropriate amount of additives, and covered with special paper.

[0003] The existing paper-faced gypsum board has poor flexural resistance, which easily leads to poor strength and thermal insulation of the product. The strength, flexural resistance and thermal insulation of the product are difficult to improve in a coordinated and balanced manner. At the same time, the product has poor temperature stability, which limits the use efficiency of the product. Based on this, in order to improve the flexural resistance of the product, the present invention further improves it. Summary of the invention

[0004] In view of the defects of the prior art, the object of the present invention is to provide a deflection-resistant gypsum board and a preparation method thereof to solve the problems raised in the above-mentioned background technology.

[0005] The present invention solves the technical problem by adopting the following technical solution: The present invention provides a flex-resistant gypsum board, which is made of a gypsum board core material and a facing paper. The gypsum board core material comprises the following raw materials in parts by weight: 100-110 parts of plaster of Paris, 7-11 parts of Lianheng blending agent, 4-7 parts of additives, 0.4-0.6 parts of foaming agent, 2-4 parts of water reducing agent, 2-4 parts of starch, and 50-60 parts of water.

[0006] Preferably, the foaming agent is sodium fatty alcohol polyoxyethylene ether sulfate; and the water reducer is a polycarboxylic acid water reducer.

[0007] Preferably, the preparation method of the joint balance agent is: S01: Carboxymethyl cellulose, 5% by mass lanthanum chloride solution and sodium stearate are uniformly mixed in a weight ratio of (3-5):7:(1-3) to obtain a carboxymethyl cellulose solution; Add 2-4 parts of basalt fiber and 1-3 parts of aluminum oxide to 5-8 parts of carboxymethyl cellulose solution and mix thoroughly to obtain a joint adjustment solution; S02: 4-7 parts of cordierite, 1-3 parts of silane coupling agent KH550, 2-4 parts of clay and 5-8 parts of sodium citrate solution are mixed and ultrasonically treated to obtain a cordierite modifier; S03: Silicon carbide is first stirred in a sufficient amount of sulfuric acid solution, then washed with water, filtered and dried, and the dried silicon carbide is preheated at 55-60°C for 1h; 3-5 parts of preheated silicon carbide and 5-8 parts of cordierite modifier are mixed and ball-milled at a ball-milling speed of 1000-1500 r / min for 2 hours. After the ball-milling is completed, the mixture is filtered and dried to obtain a mixed balance agent; S04: The joint adjusting liquid and the mixed balancing agent are stirred and improved in a weight ratio of 7:5. After the stirring is completed, the mixture is filtered and dried to obtain the joint balancing adjusting agent.

[0008] Preferably, the mass fraction of the sodium citrate solution is 4-7%; the mass fraction of the sulfuric acid solution is 3-5%.

[0009] Preferably, the ultrasonic power of the blending ultrasonic treatment in S02 is 550-750W, and the ultrasonic treatment is performed for 1 hour; the stirring speed of the stirring improvement treatment in S04 is 350-400r / min, and the stirring is performed for 2 hours.

[0010] Preferably, the preparation method of adding the additive is: S11: Stir the boron nitride in a sufficient amount of potassium permanganate solution, then wash, filter and dry, and heat-treat the dried boron nitride to obtain a thermally effective boron nitride agent. The specific steps of the heat equalization treatment are: first heat treatment at a temperature of 110-130°C for 10-15 minutes, then heating to 230-240°C at a rate of 2-5°C / min, keeping the temperature for 5 minutes, and finally cooling to 50°C at a rate of 1°C / min, keeping the temperature; S12: The thermally effective boron nitride agent and the additive liquid are ball-milled in a weight ratio of 5:4, with a ball-milling speed of 1000 r / min for 2 hours. After the ball-milling is completed, the mixture is filtered and dried to obtain the additive.

[0011] Preferably, the mass fraction of the potassium permanganate solution is 5-8%.

[0012] Preferably, the added liquid comprises the following raw materials in parts by weight: 3-5 parts of barium titanate, 4-7 parts of sodium silicate solution, 2-3 parts of magnesium oxide, 1-3 parts of hydrotalcite and 2-3 parts of sodium alginate solution.

[0013] Preferably, the mass fraction of the sodium silicate solution is 3-5%; the mass fraction of the sodium alginate solution is 4-7%.

[0014] The present invention also provides a method for preparing a deflection-resistant gypsum board, comprising the following steps: The raw materials in the gypsum board core material are weighed according to weight, and then mixed thoroughly to obtain the gypsum board core material, and then the gypsum board core material is poured on the face paper, overlapped and bonded to form, so as to obtain the anti-wrinkle paper-faced gypsum board.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The gypsum board of the present invention is prepared by using raw materials such as gypsum, foaming agent, water reducing agent, starch, etc., and the added balance agent and additives are used as the blending and coordination raw materials. Through the synergistic effect of the co-coordination between the raw materials, the strength, flexural resistance and thermal insulation of the product are coordinated and balanced and improved, and the product has a significant effect on temperature stability; 2. The joint balance agent first treats silicon carbide with sulfuric acid solution, and then cooperates with preheating improvement to optimize the activity efficiency of silicon carbide. At the same time, it cooperates with cordierite modifier to improve ball milling treatment. The cordierite, silane coupling agent KH550 and clay in the cordierite modifier and sodium citrate solution are blended and ultrasonically treated. Through the blending and ultrasonic improvement between the raw materials, silicon carbide is blended and coordinated, and silicon carbide is jointly optimized and improved. The blended balance agent can be better coordinated and improved with the joint adjustment liquid; 3. The basalt fiber in the joint adjustment liquid is blended with alumina and carboxymethyl cellulose liquid. The carboxymethyl cellulose, 5% by mass lanthanum chloride solution and sodium stearate in the carboxymethyl cellulose liquid are synergistic. The needle-shaped basalt fiber structure is used in combination with alumina and carboxymethyl cellulose liquid raw materials to better coordinate the blended balancing agent into the product system. The prepared joint balancing agent optimizes the performance coordination of the product in the system, as well as the stability of the temperature change resistance performance. 4. The boron nitride is treated with potassium permanganate solution and then treated with heat equalization. The heat equalization is treated at 110-130°C for 10-15min, then heated to 230-240°C at a rate of 2-5°C / min, kept warm for 5min, and finally cooled to 50°C at a rate of 1°C / min, kept warm. The coordinated improvement effect of boron nitride and the added liquid is further enhanced through step-by-step temperature adjustment and thermal equalization improvement. The added liquid is optimized by blending raw materials such as barium titanate, sodium silicate solution, magnesium oxide, hydrotalcite and sodium alginate solution. Barium titanate, magnesium oxide and hydrotalcite are used as matrix materials, and sodium silicate solution and sodium alginate solution are used as blending aids. The obtained added liquid is better coordinated with boron nitride, and the prepared added additive has a better coordinated effect with the joint balance blending agent, thereby further improving the performance of the product. DETAILED DESCRIPTION

[0016] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The present embodiment is a flex-resistant gypsum board, which is made of gypsum board core material and facing paper. The gypsum board core material includes the following raw materials in parts by weight: 100-110 parts of plaster of Paris, 7-11 parts of Lianheng blending agent, 4-7 parts of additives, 0.4-0.6 parts of foaming agent, 2-4 parts of water reducing agent, 2-4 parts of starch, and 50-60 parts of water.

[0018] The foaming agent in this embodiment is sodium sulfate of fatty alcohol polyoxyethylene ether; and the water reducing agent is polycarboxylic acid water reducing agent.

[0019] The preparation method of the joint balance blending agent of this embodiment is: S01: Carboxymethyl cellulose, 5% by mass lanthanum chloride solution and sodium stearate are uniformly mixed in a weight ratio of (3-5):7:(1-3) to obtain a carboxymethyl cellulose solution; Add 2-4 parts of basalt fiber and 1-3 parts of aluminum oxide to 5-8 parts of carboxymethyl cellulose solution and mix thoroughly to obtain a joint adjustment solution; S02: 4-7 parts of cordierite, 1-3 parts of silane coupling agent KH550, 2-4 parts of clay and 5-8 parts of sodium citrate solution are mixed and ultrasonically treated to obtain a cordierite modifier; S03: Silicon carbide is first stirred in a sufficient amount of sulfuric acid solution, then washed with water, filtered and dried, and the dried silicon carbide is preheated at 55-60°C for 1h; 3-5 parts of preheated silicon carbide and 5-8 parts of cordierite modifier are mixed and ball-milled at a ball-milling speed of 1000-1500 r / min for 2 hours. After the ball-milling is completed, the mixture is filtered and dried to obtain a mixed balance agent; S04: The joint adjusting liquid and the mixed balancing agent are stirred and improved in a weight ratio of 7:5. After the stirring is completed, the mixture is filtered and dried to obtain the joint balancing adjusting agent.

[0020] The mass fraction of the sodium citrate solution in this embodiment is 4-7%; the mass fraction of the sulfuric acid solution is 3-5%.

[0021] In S02 of this embodiment, the ultrasonic power of the blending ultrasonic treatment is 550-750 W, and the ultrasonic treatment is performed for 1 hour. In S04, the stirring speed of the stirring improvement treatment is 350-400 r / min, and the stirring is performed for 2 hours.

[0022] The preparation method of the additives in this embodiment is as follows: S11: Stirring the boron nitride in a sufficient amount of potassium permanganate solution, then washing, filtering, and drying, and subjecting the dried boron nitride to a heat-treatment, and obtaining a thermally effective boron nitride agent after the treatment is completed; The specific steps of the heat equalization treatment are: first heat treatment at a temperature of 110-130°C for 10-15 minutes, then heating to 230-240°C at a rate of 2-5°C / min, keeping the temperature for 5 minutes, and finally cooling to 50°C at a rate of 1°C / min, keeping the temperature; S12: The thermally effective boron nitride agent and the additive liquid are ball-milled in a weight ratio of 5:4 at a ball-milling speed of 1000 r / min for 2 h. After the ball-milling is completed, the mixture is filtered and dried to obtain the additive.

[0023] The mass fraction of the potassium permanganate solution in this embodiment is 5-8%.

[0024] The added liquid of this embodiment includes the following raw materials in parts by weight: 3-5 parts of barium titanate, 4-7 parts of sodium silicate solution, 2-3 parts of magnesium oxide, 1-3 parts of hydrotalcite and 2-3 parts of sodium alginate solution.

[0025] The mass fraction of the sodium silicate solution in this embodiment is 3-5%; the mass fraction of the sodium alginate solution is 4-7%.

[0026] A method for preparing a flex-resistant gypsum board according to the present embodiment comprises the following steps: The raw materials in the gypsum board core material are weighed according to weight, and then mixed thoroughly to obtain the gypsum board core material, and then the gypsum board core material is poured on the face paper, overlapped and bonded to form, so as to obtain the anti-wrinkle paper-faced gypsum board.

[0027] Embodiment 1:

[0028] The present embodiment is a flex-resistant gypsum board, which is made of gypsum board core material and facing paper. The gypsum board core material includes the following raw materials in parts by weight: 100 parts of gypsum, 7 parts of Lianheng blending agent, 4 parts of additives, 0.4 parts of foaming agent, 2 parts of water reducing agent, 2 parts of starch, and 50 parts of water.

[0029] The foaming agent in this embodiment is sodium sulfate of fatty alcohol polyoxyethylene ether; and the water reducing agent is polycarboxylic acid water reducing agent.

[0030] The preparation method of the joint balance blending agent of this embodiment is: S01: Carboxymethyl cellulose, 5% by mass lanthanum chloride solution and sodium stearate are uniformly mixed in a weight ratio of 3:7:1 to obtain a carboxymethyl cellulose solution; Add 2 parts of basalt fiber and 1 part of aluminum oxide to 5 parts of carboxymethyl cellulose solution and mix thoroughly to obtain a joint adjustment solution; S02: 4 parts of cordierite, 1 part of silane coupling agent KH550, 2 parts of clay and 5 parts of sodium citrate solution were mixed and ultrasonically treated to obtain a cordierite modifier; S03: Silicon carbide is first stirred in a sufficient amount of sulfuric acid solution, then washed with water, filtered and dried, and the dried silicon carbide is preheated at 55°C for 1 hour; 3 parts of preheated silicon carbide and 5 parts of cordierite modifier were mixed and ball-milled at a speed of 1000 r / min for 2 h. After the ball-milling was completed, the mixture was filtered and dried to obtain a mixed balance agent; S04: The joint adjusting liquid and the mixed balancing agent are stirred and improved in a weight ratio of 7:5. After the stirring is completed, the mixture is filtered and dried to obtain the joint balancing adjusting agent.

[0031] The mass fraction of the sodium citrate solution in this embodiment is 4%; the mass fraction of the sulfuric acid solution is 3%.

[0032] In S02 of this embodiment, the ultrasonic power of the blending ultrasonic treatment is 550 W, and the ultrasonic treatment is performed for 1 hour. In S04, the stirring speed of the stirring improvement treatment is 350 r / min, and the stirring is performed for 2 hours.

[0033] The preparation method of the additives in this embodiment is as follows: S11: Stir the boron nitride in a sufficient amount of potassium permanganate solution, then wash, filter and dry, and heat-treat the dried boron nitride to obtain a thermally effective boron nitride agent. The specific steps of the heat equalization treatment are: first heat treatment at 110°C for 10 min, then heating to 230°C at a rate of 2°C / min, keeping the temperature for 5 min, and finally cooling to 50°C at a rate of 1°C / min, keeping the temperature; S12: The thermally effective boron nitride agent and the additive liquid are ball-milled in a weight ratio of 5:4, with a ball-milling speed of 1000 r / min for 2 hours. After the ball-milling is completed, the mixture is filtered and dried to obtain the additive.

[0034] The mass fraction of the potassium permanganate solution in this embodiment is 5%.

[0035] The added liquid of this embodiment includes the following raw materials in parts by weight: 3 parts of barium titanate, 4 parts of sodium silicate solution, 2 parts of magnesium oxide, 1 part of hydrotalcite and 2 parts of sodium alginate solution.

[0036] The mass fraction of the sodium silicate solution in this embodiment is 3%; the mass fraction of the sodium alginate solution is 4%.

[0037] A method for preparing a flex-resistant gypsum board according to the present embodiment comprises the following steps: The raw materials in the gypsum board core material are weighed according to weight, and then mixed thoroughly to obtain the gypsum board core material, and then the gypsum board core material is poured on the face paper, overlapped and bonded to form, so as to obtain the anti-wrinkle paper-faced gypsum board.

[0038] Embodiment 2: The present embodiment is a flex-resistant gypsum board, which is made of gypsum board core material and facing paper. The gypsum board core material includes the following raw materials in parts by weight: 110 parts of gypsum, 11 parts of Lianheng blending agent, 7 parts of additives, 0.6 parts of foaming agent, 4 parts of water reducing agent, 4 parts of starch, and 60 parts of water.

[0039] The foaming agent in this embodiment is sodium sulfate of fatty alcohol polyoxyethylene ether; and the water reducing agent is polycarboxylic acid water reducing agent.

[0040] The preparation method of the joint balance blending agent of this embodiment is: S01: Carboxymethyl cellulose, 5% by mass lanthanum chloride solution and sodium stearate are uniformly mixed in a weight ratio of 5:7:3 to obtain a carboxymethyl cellulose solution; Add 4 parts of basalt fiber and 3 parts of alumina to 8 parts of carboxymethyl cellulose solution and mix thoroughly to obtain a joint adjustment solution; S02: 7 parts of cordierite, 3 parts of silane coupling agent KH550, 4 parts of clay and 8 parts of sodium citrate solution were mixed and ultrasonically treated to obtain a cordierite modifier; S03: Silicon carbide is first stirred in a sufficient amount of sulfuric acid solution, then washed with water, filtered and dried, and the dried silicon carbide is preheated at 60°C for 1h; 5 parts of preheated silicon carbide and 8 parts of cordierite modifier were mixed and ball-milled at a speed of 1500 r / min for 2 hours. After the ball-milling was completed, the mixture was filtered and dried to obtain a mixed balance agent; S04: The joint adjusting liquid and the mixed balancing agent are stirred and improved in a weight ratio of 7:5. After the stirring is completed, the mixture is filtered and dried to obtain the joint balancing adjusting agent.

[0041] The mass fraction of the sodium citrate solution in this embodiment is 7%; the mass fraction of the sulfuric acid solution is 5%.

[0042] In S02 of this embodiment, the ultrasonic power of the blending ultrasonic treatment is 750 W, and the ultrasonic treatment is performed for 1 hour. In S04, the stirring speed of the stirring improvement treatment is 400 r / min, and the stirring is performed for 2 hours.

[0043] The preparation method of the additives in this embodiment is as follows: S11: Stir the boron nitride in a sufficient amount of potassium permanganate solution, then wash, filter and dry, and heat-treat the dried boron nitride to obtain a thermally effective boron nitride agent. The specific steps of the heat equalization treatment are: first heat treatment at 130°C for 15 minutes, then heating to 240°C at a rate of 5°C / min, keeping warm for 5 minutes, and finally cooling to 50°C at a rate of 1°C / min, keeping warm; S12: The thermally effective boron nitride agent and the additive liquid are ball-milled in a weight ratio of 5:4, with a ball-milling speed of 1000 r / min for 2 hours. After the ball-milling is completed, the mixture is filtered and dried to obtain the additive.

[0044] The mass fraction of the potassium permanganate solution in this embodiment is 8%.

[0045] The added liquid of this embodiment includes the following raw materials in parts by weight: 5 parts of barium titanate, 7 parts of sodium silicate solution, 3 parts of magnesium oxide, 3 parts of hydrotalcite and 3 parts of sodium alginate solution.

[0046] The mass fraction of the sodium silicate solution in this embodiment is 5%; the mass fraction of the sodium alginate solution is 7%.

[0047] A method for preparing a flex-resistant gypsum board according to the present embodiment comprises the following steps: The raw materials in the gypsum board core material are weighed according to weight, and then mixed thoroughly to obtain the gypsum board core material, and then the gypsum board core material is poured on the face paper, overlapped and bonded to form, so as to obtain the anti-wrinkle paper-faced gypsum board.

[0048] Embodiment 3: The present embodiment is a flex-resistant gypsum board, which is made of gypsum board core material and facing paper. The gypsum board core material includes the following raw materials in parts by weight: 105 parts of gypsum, 9 parts of Lianheng blending agent, 5.5 parts of additives, 0.5 parts of foaming agent, 3 parts of water reducing agent, 3 parts of starch, and 55 parts of water.

[0049] The foaming agent in this embodiment is sodium sulfate of fatty alcohol polyoxyethylene ether; and the water reducing agent is polycarboxylic acid water reducing agent.

[0050] The preparation method of the joint balance blending agent of this embodiment is: S01: Carboxymethyl cellulose, 5% by mass lanthanum chloride solution and sodium stearate are uniformly mixed in a weight ratio of 4:7:2 to obtain a carboxymethyl cellulose solution; Add 3 parts of basalt fiber and 2 parts of aluminum oxide to 6.5 parts of carboxymethyl cellulose solution and mix thoroughly to obtain a joint adjustment solution; S02: 5.5 parts of cordierite, 2 parts of silane coupling agent KH550, 3 parts of clay and 6.5 parts of sodium citrate solution were mixed and ultrasonically treated to obtain a cordierite modifier; S03: Silicon carbide is first stirred in a sufficient amount of sulfuric acid solution, then washed with water, filtered and dried, and the dried silicon carbide is preheated at 57.5°C for 1h; 4 parts of preheated silicon carbide and 6.5 parts of cordierite modifier were mixed and ball-milled at a speed of 1250 r / min for 2 h. After the ball-milling was completed, the mixture was filtered and dried to obtain a mixed balance agent; S04: The joint adjusting liquid and the mixed balancing agent are stirred and improved in a weight ratio of 7:5. After the stirring is completed, the mixture is filtered and dried to obtain the joint balancing adjusting agent.

[0051] The mass fraction of the sodium citrate solution in this embodiment is 5.5%; the mass fraction of the sulfuric acid solution is 4%.

[0052] In S02 of this embodiment, the ultrasonic power of the blending ultrasonic treatment is 600 W, and the ultrasonic treatment is performed for 1 hour. In S04, the stirring speed of the stirring improvement treatment is 375 r / min, and the stirring is performed for 2 hours.

[0053] The preparation method of the additives in this embodiment is as follows: S11: Stirring the boron nitride in a sufficient amount of potassium permanganate solution, then washing, filtering, and drying, and subjecting the dried boron nitride to a heat-treatment, and obtaining a thermally effective boron nitride agent after the treatment is completed; The specific steps of the heat equalization treatment are: first heat treatment at 120°C for 12.5 min, then heating to 235°C at a rate of 3.5°C / min, keeping the temperature for 5 min, and finally cooling to 50°C at a rate of 1°C / min, keeping the temperature; S12: The thermally effective boron nitride agent and the additive liquid are ball-milled in a weight ratio of 5:4 at a ball-milling speed of 1000 r / min for 2 h. After the ball-milling is completed, the mixture is filtered and dried to obtain the additive.

[0054] The mass fraction of the potassium permanganate solution in this embodiment is 6.5%.

[0055] The added liquid of this embodiment includes the following raw materials in parts by weight: 4 parts of barium titanate, 5.5 parts of sodium silicate solution, 2.5 parts of magnesium oxide, 2 parts of hydrotalcite and 2.5 parts of sodium alginate solution.

[0056] The mass fraction of the sodium silicate solution in this embodiment is 4%; the mass fraction of the sodium alginate solution is 5.5%.

[0057] A method for preparing a flex-resistant gypsum board according to the present embodiment comprises the following steps: The raw materials in the gypsum board core material are weighed according to weight, and then mixed thoroughly to obtain the gypsum board core material, and then the gypsum board core material is poured on the face paper, overlapped and bonded to form, so as to obtain the anti-wrinkle paper-faced gypsum board.

[0058] Comparative Example 1: The difference from Example 3 is that no balance regulator is added.

[0059] Comparative Example 2: The difference from Example 3 is that no joint adjustment liquid is added in the preparation of the joint adjustment agent.

[0060] Comparative Example 3: The difference from Example 3 is that basalt fiber and alumina are not added to the joint adjustment liquid.

[0061] Comparative Example 4: The difference from Example 3 is that the carboxymethyl cellulose solution in the joint adjustment solution is replaced by a 5% by mass lanthanum chloride solution.

[0062] Comparative Example 5: The difference from Example 3 is that no blending balancing agent is added during the preparation of the balancing blending agent.

[0063] Comparative Example 6: The difference from Example 3 is that no preheated silicon carbide is added in the preparation of the blended balancing agent.

[0064] Comparative Example 7: The difference from Example 3 is that no cordierite modifier is added in the preparation of the blended balancing agent.

[0065] Comparative Example 8: The difference from Example 3 is that cordierite and silane coupling agent KH550 are not added in the preparation of the cordierite modifier.

[0066] Comparative Example 9: The difference from Example 3 is that no clay is added in the preparation of the cordierite modifier and the sodium citrate solution is replaced by water.

[0067] Comparative Example 10: The difference from Example 3 is that no additional materials were added.

[0068] Comparative Example 11: The difference from Example 3 is that no additional liquid is added during the preparation of the additional material.

[0069] Comparative Example 12: The difference from Example 3 is that in the preparation of the additives, no heat equalization treatment is used in S11.

[0070] The products of Examples 1 to 3 and Comparative Examples 1 to 12 were subjected to conventional performance tests, including strength, flexural resistance and thermal insulation, and the product temperature change stability was tested (the product was placed at 75°C for 12 hours, then at -5°C for 12 hours, and finally at room temperature for 24 hours). The test results are as follows;

[0071] It can be seen from Comparative Examples 1 to 12 and Examples 1 to 3 that; The product of Example 3 has excellent compressive strength, and the product has excellent moisture deflection and thermal insulation performance. The three can be improved in a coordinated manner. In addition, the product has a significant stability effect under temperature fluctuation conditions. From Comparative Examples 1 to 12 and Example 3, it can be seen that the performance of the products without adding the balance blending agent or one of the additives is obviously deteriorating. The performance of the products is most obvious when the two are combined and work together. No joint adjustment liquid was added in the preparation of the joint adjustment agent, no basalt fiber and alumina were added to the joint adjustment liquid, the carboxymethyl cellulose liquid in the joint adjustment liquid was replaced by a 5% by mass lanthanum chloride solution, no blended balance agent was added in the preparation of the joint adjustment agent, no preheated silicon carbide was added in the preparation of the blended balance agent, no cordierite modifier was added in the preparation of the blended balance agent, no cordierite and silane coupling agent KH550 were added in the preparation of the cordierite modifier, no clay was added in the preparation of the cordierite modifier, and the sodium citrate solution was replaced by water. The performance of the products all showed a trend of deterioration to varying degrees; Only the blended balancing agent made by combining the cordierite modifier obtained by the method of the present invention with preheated silicon carbide, and the combined balancing agent made by combining the combined adjustment liquid obtained by the specific method of the present invention, have the most significant performance effect. The effects of other methods are not as obvious as those of the present invention. At the same time, the cordierite modifier and joint adjustment liquid obtained by the method of the present invention have the most significant performance effects; When no additive liquid was added during the preparation of the additive, and when no heat equalization treatment was used in S11, the performance of the products showed a trend of deterioration to varying degrees. At the same time, when no additive liquid was added, the performance of the products changed significantly. The performance effect of the products obtained by the method of the present invention was the most obvious.

[0072] Since the added liquid has a significant impact on the performance of the product, further research is conducted on this: The added liquid includes the following raw materials in parts by weight: 3-5 parts of barium titanate, 4-7 parts of sodium silicate solution, 2-3 parts of magnesium oxide, 1-3 parts of hydrotalcite and 2-3 parts of sodium alginate solution.

[0073] The mass fraction of the sodium silicate solution in this embodiment is 3-5%; the mass fraction of the sodium alginate solution is 4-7%.

[0074] Experimental Example 1: The only difference from Example 3 is that no magnesium oxide is added to the added liquid.

[0075] Experimental Example 2: The only difference from Example 3 is that no hydrotalcite is added to the added liquid.

[0076] Experimental Example 3: The only difference from Example 3 is that no barium titanate is added to the liquid.

[0077] Experimental Example 4: The only difference from Example 3 is that no sodium silicate solution is added to the added liquid.

[0078] Experimental Example 5: The only difference from Example 3 is that no sodium alginate solution is added to the added liquid.

[0079] The product performance tests of Experimental Examples 1-5 are as follows:

[0080] It can be seen from Experimental Examples 1-5 that when barium titanate is not added to the added liquid, the performance of the product tends to change greatly. At the same time, when magnesium oxide is not added to the added liquid, magnesium oxide is not added to the added liquid, sodium silicate solution is not added, and sodium alginate solution is not added, the performance of the product tends to deteriorate to varying degrees. The added liquid obtained by combining barium titanate and magnesium oxide with specific raw materials has the most significant product performance effect. Only the product prepared with the specific raw materials of the present invention has the most significant performance effect. Using other methods instead is not as obvious as the effect of the present invention.

[0081] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0082] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A flex-resistant gypsum board, characterized in that: Paper-faced gypsum board is made of gypsum board core material and facing paper. The gypsum board core material includes the following raw materials in parts by weight: 100-110 parts of plaster of Paris, 7-11 parts of Lianheng blending agent, 4-7 parts of additives, 0.4-0.6 parts of foaming agent, 2-4 parts of water reducer, 2-4 parts of starch, and 50-60 parts of water; The preparation method of the joint balance agent is: S01: Carboxymethyl cellulose, 5% by mass lanthanum chloride solution and sodium stearate are uniformly mixed in a weight ratio of (3-5):7:(1-3) to obtain a carboxymethyl cellulose solution; Add 2-4 parts of basalt fiber and 1-3 parts of aluminum oxide to 5-8 parts of carboxymethyl cellulose solution and mix thoroughly to obtain a joint adjustment solution; S02: 4-7 parts of cordierite, 1-3 parts of silane coupling agent KH550, 2-4 parts of clay and 5-8 parts of sodium citrate solution are mixed and ultrasonically treated to obtain a cordierite modifier; S03: Silicon carbide is first stirred in a sufficient amount of sulfuric acid solution, then washed with water, filtered and dried, and the dried silicon carbide is preheated at 55-60°C for 1h; 3-5 parts of preheated silicon carbide and 5-8 parts of cordierite modifier are mixed and ball-milled at a ball-milling speed of 1000-1500 r / min for 2 hours. After the ball-milling is completed, the mixture is filtered and dried to obtain a mixed balance agent; S04: The joint adjustment liquid and the mixed balancing agent are stirred and improved in a weight ratio of 7:

5. After the stirring is completed, the mixture is filtered and dried to obtain a joint balancing agent; The preparation method of the additive is as follows: S11: Stir the boron nitride in a sufficient amount of potassium permanganate solution, then wash, filter and dry, and heat-treat the dried boron nitride to obtain a thermally effective boron nitride agent. The specific steps of the heat equalization treatment are: first heat treatment at a temperature of 110-130°C for 10-15 minutes, then heating to 230-240°C at a rate of 2-5°C / min, keeping the temperature for 5 minutes, and finally cooling to 50°C at a rate of 1°C / min, keeping the temperature; S12: The thermally effective boron nitride agent and the additive liquid are ball-milled in a weight ratio of 5:4 at a ball-milling speed of 1000 r / min for 2 h. After the ball-milling is completed, the mixture is filtered and dried to obtain the additive.

2. The anti-deflection gypsum board according to claim 1, characterized in that: The foaming agent is sodium fatty alcohol polyoxyethylene ether sulfate; the water reducing agent is polycarboxylic acid water reducing agent.

3. The anti-deflection gypsum board according to claim 1, characterized in that: The mass fraction of the sodium citrate solution is 4-7%; the mass fraction of the sulfuric acid solution is 3-5%.

4. The anti-deflection gypsum board according to claim 1, characterized in that: The ultrasonic power of the blending ultrasonic treatment in S02 was 550-750W, and the ultrasonic treatment lasted for 1 hour. The stirring speed of the stirring improvement treatment in S04 was 350-400r / min, and the stirring was carried out for 2 hours.

5. The anti-deflection gypsum board according to claim 1, characterized in that: The mass fraction of potassium permanganate solution is 5-8%.

6. The anti-deflection gypsum board according to claim 1, characterized in that: The added liquid includes the following raw materials in parts by weight: 3-5 parts of barium titanate, 4-7 parts of sodium silicate solution, 2-3 parts of magnesium oxide, 1-3 parts of hydrotalcite and 2-3 parts of sodium alginate solution.

7. The anti-deflection gypsum board according to claim 6, characterized in that: The mass fraction of the sodium silicate solution is 3-5%; the mass fraction of the sodium alginate solution is 4-7%.

8. A method for preparing a flex-resistant gypsum board according to any one of claims 1 to 7, characterized in that: The following steps are involved: The raw materials in the gypsum board core material are weighed according to weight, and then mixed thoroughly to obtain the gypsum board core material, and then the gypsum board core material is poured on the face paper, overlapped and bonded to form, so as to obtain the anti-wrinkle paper-faced gypsum board.

Images