A flexural-resistant gypsum board for paper surface and its preparation method

Abstract

The present invention relates to the technical field of gypsum boards, and particularly relates to a flexural-resistant paper-faced gypsum board and a preparation method thereof. The paper-faced gypsum board is made of a gypsum board core material and facing paper. The gypsum board core material comprises the following raw materials in parts by weight: 100-110 parts of calcined gypsum, 7-11 parts of Lianheng conditioner, 4-7 parts of incorporated additive, 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. The paper-faced gypsum board of the present invention uses raw materials such as calcined gypsum, foaming agent, water reducing agent, and starch in combination, and at the same time, the added Lianheng conditioner and incorporated additive are used as conditioning and coordinating raw materials. Through the co-ordination and synergistic effect among the raw materials, the strength, flexural resistance, and heat preservation of the product are coordinately and balancedly improved, and at the same time, the temperature change resistance stability effect of the product is remarkable.

Description

Technical Field

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

[0002] Gypsum board is a material made mainly of building gypsum. It is a building material with light weight, relatively high strength, thin thickness, convenient processing, and good sound insulation, heat insulation, and fire prevention properties. It is one of the new lightweight boards that are currently being focused on for development. Paper-faced gypsum board is a board made with gypsum as the main raw material, admixed with appropriate additives, and with a special paper as the face.

[0003] Existing paper-faced gypsum boards have poor flexure resistance, which easily leads to poor strength and heat preservation of the products. It is very difficult to coordinately and balancedly improve the strength, flexure resistance, and heat preservation of the products. At the same time, the products have poor temperature change stability, which limits the use efficiency of the products. Based on this, in order to improve the flexure resistance of the products, the present invention further improves them. Summary of the Invention

[0004] Aiming at the defects of the existing technology, the purpose of the present invention is to provide a flexure-resistant paper-faced gypsum board and a preparation method thereof to solve the problems raised in the above background art.

[0005] The present invention adopts the following technical solutions to solve the technical problems:

[0006] The present invention provides a flexure-resistant paper-faced 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:

[0007] 100 - 110 parts of calcined gypsum, 7 - 11 parts of Lianheng conditioner, 4 - 7 parts of incorporated additive, 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.

[0008] Preferably, the foaming agent is sodium lauryl polyoxyethylene sulfate; the water reducing agent is a polycarboxylate water reducing agent.

[0009] Preferably, the preparation method of the Lianheng conditioner is as follows:

[0010] S01: Mix carboxymethyl cellulose, a 5% lanthanum chloride solution by mass fraction, and sodium stearate evenly according to the weight ratio of (3 - 5):7:(1 - 3) to obtain a carboxymethyl cellulose solution;

[0011] Add 2 - 4 parts of basalt fibers and 1 - 3 parts of alumina to 5 - 8 parts of the carboxymethyl cellulose solution and mix thoroughly to obtain a combined conditioner solution;

[0012] S02: Blend 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, and perform ultrasonic treatment to obtain a cordierite modifier;

[0013] S03: First, stir silicon carbide sufficiently in a sufficient amount of sulfuric acid solution, then wash with water, filter by suction, and dry. Preheat the dried silicon carbide at a temperature of 55 - 60 °C for 1 h;

[0014] Blend 3 - 5 parts of preheated silicon carbide and 5 - 8 parts of cordierite modifier, and perform ball milling treatment at a ball milling speed of 1000 - 1500 r / min for 2 h. After the ball milling is completed, filter by suction and dry to obtain a blended equilibrium agent;

[0015] S04: Stir and improve the blend of the conditioning liquid and the blended equilibrium agent according to a weight ratio of 7:5. After the stirring is completed, filter by suction and dry to obtain a combined equilibrium conditioner.

[0016] Preferably, the mass fraction of the sodium citrate solution is 4 - 7%; the mass fraction of the sulfuric acid solution is 3 - 5%.

[0017] Preferably, in S02, the ultrasonic power for the ultrasonic treatment during blending is 550 - 750 W, and the ultrasonic treatment is performed for 1 h; in S04, the stirring speed for the stirring and improvement treatment is 350 - 400 r / min, and the stirring is performed for 2 h.

[0018] Preferably, the preparation method of the incorporated additive is as follows:

[0019] S11: Stir boron nitride sufficiently in a sufficient amount of potassium permanganate solution, then wash with water, filter by suction, and dry. Then perform heat equalization treatment on the dried boron nitride. After the treatment is completed, obtain a heat - equalized boron nitride agent;

[0020] The specific steps of the heat equalization treatment are as follows: First, perform heat treatment at a temperature of 110 - 130 °C for 10 - 15 min, then increase the temperature at a rate of 2 - 5 °C / min to 230 - 240 °C, hold for 5 min, and finally cool to 50 °C at a rate of 1 °C / min and hold;

[0021] S12: Perform ball milling treatment on the heat - equalized boron nitride agent and the incorporated liquid according to a weight ratio of 5:4 at a ball milling speed of 1000 r / min for 2 h. After the ball milling is completed, filter by suction and dry to obtain the incorporated additive.

[0022] Preferably, the mass fraction of the potassium permanganate solution is 5 - 8%.

[0023] Preferably, the incorporated liquid includes the following raw materials in parts by weight:

[0024] 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] Preferably, the mass fraction of the sodium silicate solution is 3-5%; the mass fraction of the sodium alginate solution is 4-7%.

[0026] The present invention also provides a method for preparing a flexural-resistant paper-faced gypsum board, comprising the following steps:

[0027] Weigh the raw materials in the gypsum board core material according to parts by weight, then mix them evenly to obtain the gypsum board core material, and then pour the gypsum board core material onto the facing paper, overlap and bond it firmly to form a flexural-resistant paper-faced gypsum board.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The paper-faced gypsum board of the present invention is prepared by using raw materials such as plaster of Paris, foaming agent, water reducing agent, starch, etc., and at the same time adding a combined balance conditioner and a formulated additive as the blending and coordinating raw materials. Through the co-blending and synergistic effect between the raw materials, the strength, flexural resistance and heat preservation of the product are coordinately balanced and improved, and at the same time, the temperature change resistance stability effect of the product is remarkable;

[0030] 2. The combined balance conditioner is first treated with sulfuric acid solution for silicon carbide, and then improved by preheating to optimize the activity efficiency of silicon carbide. At the same time, it is further improved by ball milling treatment with cordierite modifier. The cordierite, silane coupling agent KH550, clay and sodium citrate solution in the cordierite modifier are mixed and ultrasonically treated. Through the co-blending and ultrasonic improvement between the raw materials, silicon carbide is harmoniously coordinated, and silicon carbide is jointly optimized and improved. Furthermore, the blended balance agent obtained can better coordinate and enhance with the combined adjustment liquid;

[0031] 3. The basalt fiber in the combined adjustment liquid is blended and harmonized with alumina and carboxymethyl cellulose solution. The carboxymethyl cellulose, 5% mass fraction lanthanum chloride solution and sodium stearate in the carboxymethyl cellulose solution cooperate with each other synergistically. The needle-shaped basalt fiber structure is used to cooperate with alumina and carboxymethyl cellulose solution raw materials, so as to better incorporate the blended balance agent into the product system. Furthermore, the prepared combined balance conditioner optimizes the performance coordination of the product in the system and the temperature change resistance performance stability;

[0032] 4. The introduced additive uses boron nitride treated with potassium permanganate solution, and is combined with heat equalization treatment. The heat equalization treatment is carried out at a temperature of 110 - 130 °C for 10 - 15 min, then heated to 230 - 240 °C at a rate of 2 - 5 °C / min, held for 5 min, and finally cooled to 50 °C at a rate of 1 °C / min and held. Through step-by-step and segmented temperature adjustment improvement, using the heat equalization improvement method, the coordination improvement effect between boron nitride and the introduced liquid is further enhanced. The introduced liquid is prepared by mixing and optimizing raw materials such as barium titanate, sodium silicate solution, magnesium oxide, hydrotalcite, and sodium alginate solution. Using barium titanate, magnesium oxide, and hydrotalcite as the matrix materials, and combining sodium silicate solution and sodium alginate solution as blending aids, the obtained introduced liquid can better coordinate with boron nitride. Furthermore, the prepared introduced additive has a better coordination effect with the combined balance conditioner, thereby further improving the performance of the product. Detailed implementation mode

[0033] The following combines specific embodiments to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0034] An anti-flexible gypsum board for this embodiment is made of a gypsum board core material and a facing paper. The gypsum board core material includes the following raw materials in parts by weight:

[0035] 100 - 110 parts of hemihydrate gypsum, 7 - 11 parts of combined balance conditioner, 4 - 7 parts of introduced additive, 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.

[0036] The foaming agent in this embodiment is sodium lauryl polyoxyethylene ether sulfate; the water reducing agent is a polycarboxylate water reducing agent.

[0037] The preparation method of the combined balance conditioner in this embodiment is as follows:

[0038] S01: Mix carboxymethyl cellulose, a 5% lanthanum chloride solution by mass fraction, and sodium stearate evenly according to the weight ratio (3 - 5):7:(1 - 3) to obtain a carboxymethyl cellulose solution;

[0039] Add 2 - 4 parts of basalt fiber and 1 - 3 parts of alumina to 5 - 8 parts of the carboxymethyl cellulose solution and mix well to obtain a combined adjustment solution;

[0040] S02: Mix 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 and perform ultrasonic treatment to obtain a cordierite modifier;

[0041] S03: Silicon carbide is stirred thoroughly in a sufficient amount of sulfuric acid solution, then washed with water, filtered by suction, and dried. The dried silicon carbide is preheated at a temperature of 55 - 60 °C for 1 h;

[0042] 3 - 5 parts of the preheated silicon carbide and 5 - 8 parts of cordierite modifier are blended and ball - milled. The ball - mill rotation speed is 1000 - 1500 r / min, and ball - milling is carried out for 2 h. After ball - milling is completed, filtration by suction and drying are performed to obtain the blended equilibrium agent;

[0043] S04: The joint - adjustment liquid and the blended equilibrium agent are stirred and improved according to a weight ratio of 7:5. After stirring is completed, filtration by suction and drying are performed to obtain the joint - equilibrium conditioner.

[0044] In this example, the mass fraction of the sodium citrate solution is 4 - 7%; the mass fraction of the sulfuric acid solution is 3 - 5%.

[0045] In S02 of this example, the ultrasonic power for the co - blending ultrasonic treatment is 550 - 750 W, and ultrasonic treatment is carried out for 1 h; in S04, the stirring rotation speed for the stirring improvement treatment is 350 - 400 r / min, and stirring is carried out for 2 h.

[0046] The preparation method of the feed - in additive in this example is as follows:

[0047] S11: Boron nitride is stirred thoroughly in a sufficient amount of potassium permanganate solution, then washed with water, filtered by suction, and dried. The dried boron nitride is then subjected to heat - equalization treatment. After the treatment is completed, the heat - equalized boron nitride agent is obtained;

[0048] The specific steps of the heat - equalization treatment are as follows: First, heat - treat at a temperature of 110 - 130 °C for 10 - 15 min, then raise the temperature at a rate of 2 - 5 °C / min to 230 - 240 °C, hold for 5 min, and finally cool to 50 °C at a rate of 1 °C / min and hold;

[0049] S12: The heat - equalized boron nitride agent and the feed - in liquid are ball - milled according to a weight ratio of 5:4. The ball - mill rotation speed is 1000 r / min, and ball - milling is carried out for 2 h. After ball - milling is completed, filtration by suction and drying are performed to obtain the feed - in additive.

[0050] In this example, the mass fraction of the potassium permanganate solution is 5 - 8%.

[0051] The feed - in liquid in this example includes the following raw materials in parts by weight:

[0052] 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.

[0053] In this example, the mass fraction of the sodium silicate solution is 3 - 5%; the mass fraction of the sodium alginate solution is 4 - 7%.

[0054] A preparation method of a flexure-resistant gypsum board for this embodiment includes the following steps:

[0055] Weigh the raw materials in the gypsum board core material by weight, then mix them evenly to obtain the gypsum board core material. Then pour the gypsum board core material onto the facing paper, overlap and stick it firmly to form a flexure-resistant gypsum board.

[0056] Example 1:

[0057] A flexure-resistant gypsum board for this embodiment is made of a gypsum board core material and a facing paper. The gypsum board core material includes the following raw materials by weight:

[0058] 100 parts of hemihydrate gypsum, 7 parts of Lianheng conditioner, 4 parts of incorporated additive, 0.4 part of foaming agent, 2 parts of water reducer, 2 parts of starch, and 50 parts of water.

[0059] The foaming agent in this embodiment is sodium lauryl polyoxyethylene sulfate; the water reducer is a polycarboxylate water reducer.

[0060] The preparation method of the Lianheng conditioner in this embodiment is as follows:

[0061] S01: Mix carboxymethyl cellulose, a 5% lanthanum chloride solution by mass fraction, and sodium stearate evenly according to a weight ratio of 3:7:1 to obtain a carboxymethyl cellulose solution;

[0062] Add 2 parts of basalt fiber and 1 part of alumina to 5 parts of the carboxymethyl cellulose solution and mix them evenly to obtain a combined adjustment solution;

[0063] S02: Mix 4 parts of cordierite, 1 part of silane coupling agent KH550, 2 parts of clay, and 5 parts of sodium citrate solution and perform ultrasonic treatment to obtain a cordierite modifier;

[0064] S03: Stir silicon carbide sufficiently in a sufficient amount of sulfuric acid solution, then wash, filter by suction, and dry. Preheat the dried silicon carbide at a temperature of 55°C for 1 h;

[0065] Mix 3 parts of the preheated silicon carbide and 5 parts of the cordierite modifier and perform ball milling treatment. The ball milling speed is 1000 r / min, and ball milling is carried out for 2 h. After ball milling is completed, filter by suction and dry to obtain a blended balance agent;

[0066] S04: Stir and improve the combined adjustment solution and the blended balance agent according to a weight ratio of 7:5. After stirring is completed, filter by suction and dry to obtain the Lianheng conditioner.

[0067] The mass fraction of the sodium citrate solution in this embodiment is 4%; the mass fraction of the sulfuric acid solution is 3%.

[0068] 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.

[0069] The preparation method of the additives in this embodiment is as follows:

[0070] 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;

[0071] 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;

[0072] 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.

[0073] The mass fraction of the potassium permanganate solution in this embodiment is 5%.

[0074] The added liquid of this embodiment includes the following raw materials in parts by weight:

[0075] 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.

[0076] The mass fraction of the sodium silicate solution in this embodiment is 3%; the mass fraction of the sodium alginate solution is 4%.

[0077] A method for preparing a flex-resistant gypsum board according to the present embodiment comprises the following steps:

[0078] 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.

[0079] Embodiment 2:

[0080] 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:

[0081] 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.

[0082] 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.

[0083] The preparation method of the combined balance conditioner in this embodiment is as follows:

[0084] S01: Mix carboxymethyl cellulose, a 5% lanthanum chloride solution by mass fraction, and sodium stearate evenly according to a weight ratio of 5:7:3 to obtain a carboxymethyl cellulose solution;

[0085] Add 4 parts of basalt fiber and 3 parts of alumina to 8 parts of the carboxymethyl cellulose solution and mix well to obtain a combined adjustment solution;

[0086] S02: Mix 7 parts of cordierite, 3 parts of silane coupling agent KH550, 4 parts of clay, and 8 parts of sodium citrate solution and perform ultrasonic treatment to obtain a cordierite modifier;

[0087] SiC is first stirred well in a sufficient amount of sulfuric acid solution, then washed with water, filtered by suction, and dried. The dried SiC is then preheated at a temperature of 60°C for 1 h;

[0088] Mix 5 parts of the preheated SiC and 8 parts of the cordierite modifier and perform ball milling treatment at a ball milling speed of 1500 r / min for 2 h. After the ball milling is completed, filter by suction and dry to obtain a blended balance efficiency agent;

[0089] S04: Stir and improve the combined adjustment solution and the blended balance efficiency agent according to a weight ratio of 7:5. After the stirring is completed, filter by suction and dry to obtain a combined balance conditioner.

[0090] The mass fraction of the sodium citrate solution in this embodiment is 7%; the mass fraction of the sulfuric acid solution is 5%.

[0091] In S02 of this embodiment, the ultrasonic power for the ultrasonic treatment during the mixing is 750 W and the ultrasonic treatment is performed for 1 h; in S04, the stirring speed for the stirring and improvement treatment is 400 r / min and the stirring is performed for 2 h.

[0092] The preparation method of the dosing additive in this embodiment is as follows:

[0093] S11: Stir boron nitride well in a sufficient amount of potassium permanganate solution, then wash with water, filter by suction, and dry. The dried boron nitride is then subjected to heat equalization treatment. After the treatment is completed, a heat-effective boron nitride agent is obtained;

[0094] The specific steps of the heat equalization treatment are as follows: First, perform heat treatment at a temperature of 130°C for 15 min, then increase the temperature to 240°C at a rate of 5°C / min, hold for 5 min, and finally cool to 50°C at a rate of 1°C / min and hold;

[0095] S12: Perform ball milling treatment on the heat-effective boron nitride agent and the addition liquid according to a weight ratio of 5:4 at a ball milling speed of 1000 r / min for 2 h. After the ball milling is completed, filter by suction and dry to obtain a dosing additive.

[0096] The mass fraction of the potassium permanganate solution in this embodiment is 8%.

[0097] The addition liquid in this embodiment comprises the following raw materials in parts by weight:

[0098] 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.

[0099] The mass fraction of the sodium silicate solution in this embodiment is 5%; the mass fraction of the sodium alginate solution is 7%.

[0100] A preparation method of a flexure-resistant paper-faced gypsum board in this embodiment comprises the following steps:

[0101] Weigh the raw materials in the gypsum board core material according to parts by weight, then mix them evenly to obtain the gypsum board core material, and then pour the gypsum board core material on the facing paper, overlap and bond it firmly to form a flexure-resistant paper-faced gypsum board.

[0102] Example 3:

[0103] A flexure-resistant paper-faced gypsum board in this embodiment 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:

[0104] 105 parts of plaster of Paris, 9 parts of Lianheng conditioner, 5.5 parts of added filler, 0.5 part of foaming agent, 3 parts of water reducing agent, 3 parts of starch, 55 parts of water.

[0105] The foaming agent in this embodiment is sodium lauryl polyoxyethylene sulfate; the water reducing agent is a polycarboxylate water reducing agent.

[0106] The preparation method of the Lianheng conditioner in this embodiment is as follows:

[0107] S01: Mix carboxymethyl cellulose, a 5% lanthanum chloride solution by mass fraction and sodium stearate evenly according to a weight ratio of 4:7:2 to obtain a carboxymethyl cellulose solution;

[0108] Add 3 parts of basalt fiber and 2 parts of alumina to 6.5 parts of the carboxymethyl cellulose solution and mix them evenly to obtain a joint conditioning solution;

[0109] S02: Mix 5.5 parts of cordierite, 2 parts of silane coupling agent KH550, 3 parts of clay and 6.5 parts of sodium citrate solution and perform ultrasonic treatment to obtain a cordierite modifier;

[0110] S03: Stir silicon carbide sufficiently in a sufficient amount of sulfuric acid solution, then wash it with water, filter it by suction and dry it. Preheat the dried silicon carbide at a temperature of 57.5 °C for 1 h;

[0111] 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;

[0112] 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.

[0113] The mass fraction of the sodium citrate solution in this embodiment is 5.5%; the mass fraction of the sulfuric acid solution is 4%.

[0114] 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.

[0115] The preparation method of the additives in this embodiment is as follows:

[0116] 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;

[0117] 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;

[0118] 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.

[0119] The mass fraction of the potassium permanganate solution in this embodiment is 6.5%.

[0120] The added liquid of this embodiment includes the following raw materials in parts by weight:

[0121] 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.

[0122] The mass fraction of the sodium silicate solution in this embodiment is 4%; the mass fraction of the sodium alginate solution is 5.5%.

[0123] A method for preparing a flex-resistant gypsum board according to the present embodiment comprises the following steps:

[0124] 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.

[0125] Comparative Example 1:

[0126] It is different from Example 3 in that the Lianheng conditioner is not added.

[0127] Comparative Example 2:

[0128] It is different from Example 3 in that the joint adjustment liquid is not added during the preparation of the Lianheng conditioner.

[0129] Comparative Example 3:

[0130] It is different from Example 3 in that basalt fiber and alumina are not added to the joint adjustment liquid.

[0131] Comparative Example 4:

[0132] It is different from Example 3 in that the carboxymethyl cellulose solution in the joint adjustment liquid is replaced with a 5% lanthanum chloride solution by mass fraction.

[0133] Comparative Example 5:

[0134] It is different from Example 3 in that the blended balance agent is not added during the preparation of the Lianheng conditioner.

[0135] Comparative Example 6:

[0136] It is different from Example 3 in that preheated silicon carbide is not added during the preparation of the blended balance agent.

[0137] Comparative Example 7:

[0138] It is different from Example 3 in that the cordierite modifier is not added during the preparation of the blended balance agent.

[0139] Comparative Example 8:

[0140] It is different from Example 3 in that cordierite and silane coupling agent KH550 are not added during the preparation of the cordierite modifier.

[0141] Comparative Example 9:

[0142] It is different from Example 3 in that clay is not added during the preparation of the cordierite modifier and the sodium citrate solution is replaced with water.

[0143] Comparative Example 10:

[0144] It is different from Example 3 in that the incorporated additive is not added.

[0145] Comparative Example 11:

[0146] It is different from Example 3 in that the incorporation liquid is not added during the preparation of the incorporated additive.

[0147] Comparative Example 12:

[0148] Different from Example 3, in the preparation of the incorporated additive, thermal equalization treatment was not used in S11.

[0149] The products of Examples 1 - 3 and Comparative Examples 1 - 12 were subjected to conventional performance tests, testing strength, flexural resistance, and heat preservation properties. At the same time, the temperature change stability of the products was tested (the products were placed at 75°C for 12 h, then at -5°C for 12 h, and finally at room temperature for 24 h). The test results are as follows;

[0150]

[0151] It can be seen from Comparative Examples 1 - 12 and Examples 1 - 3 that;

[0152] The product of Example 3 has excellent compressive strength. At the same time, the product has excellent moisture absorption deflection and heat preservation properties, and the three can be coordinately improved. In addition, the stability effect of the product under temperature change conditions is significant;

[0153] It can be seen from Comparative Examples 1 - 12 and Example 3 that when a balance - adjusting agent or an incorporated additive is not added to the product, the performance of the product shows an obvious deteriorating trend. When the two are used in coordination, the product performance effect is the most obvious;

[0154] When the joint - adjusting liquid is not added in the preparation of the balance - adjusting agent, basalt fiber and alumina are not added to the joint - adjusting liquid, the carboxymethyl cellulose solution in the joint - adjusting liquid is replaced with a 5% lanthanum chloride solution by mass fraction, the incorporated balance - agent is not added in the preparation of the balance - adjusting agent, pre - heated silicon carbide is not added in the preparation of the incorporated balance - agent, cordierite modifier is not added in the preparation of the incorporated balance - agent, cordierite is not added in the preparation of the cordierite modifier, silane coupling agent KH550, clay is not added in the preparation of the cordierite modifier, and the sodium citrate solution is replaced with water, the performance of the product shows a deteriorating trend to varying degrees;

[0155] Only the incorporated balance - agent made of cordierite modifier obtained by the method of the present invention and pre - heated silicon carbide, and the balance - adjusting agent made of the joint - adjusting liquid obtained by the specific method of the present invention have the most significant product performance effect. Using other methods to replace them is not as obvious as the effect of the present invention;

[0156] At the same time, the cordierite modifier and joint - adjusting liquid obtained by the method of the present invention have the most significant product performance effect;

[0157] When the incorporation liquid is not added in the preparation of the incorporated additive, and thermal equalization treatment is not used in S11 during the preparation of the incorporated additive, the performance of the product shows a deteriorating trend to varying degrees. At the same time, when the incorporation liquid is not added, the performance change of the product is more obvious. The product performance effect is the most obvious when using the incorporated additive obtained by the method of the present invention.

[0158] Since the addition liquid has a great impact on the performance of the product, further research is carried out on this:

[0159] The addition liquid comprises the following raw materials in parts by weight:

[0160] 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.

[0161] In this embodiment, the mass fraction of the sodium silicate solution is 3 - 5%; the mass fraction of the sodium alginate solution is 4 - 7%.

[0162] Experimental Example 1:

[0163] The only difference from Example 3 is that magnesium oxide is not added to the addition liquid.

[0164] Experimental Example 2:

[0165] The only difference from Example 3 is that hydrotalcite is not added to the addition liquid.

[0166] Experimental Example 3:

[0167] The only difference from Example 3 is that barium titanate is not added to the addition liquid.

[0168] Experimental Example 4:

[0169] The only difference from Example 3 is that the sodium silicate solution is not added to the addition liquid.

[0170] Experimental Example 5:

[0171] The only difference from Example 3 is that the sodium alginate solution is not added to the addition liquid.

[0172] The product performance tests of Experimental Examples 1 - 5 are as follows:

[0173]

[0174] It can be seen from Experimental Examples 1 - 5 that when barium titanate is not added to the addition liquid, the change trend of the product performance is large. At the same time, when magnesium oxide is not added, when magnesium oxide is not added, when sodium silicate solution is not added, and when sodium alginate solution is not added, the performance of the product shows a deteriorating trend to varying degrees. The addition 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, and using other methods to replace it is not as obvious as the effect of the present invention.

[0175] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

[0176] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments 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: 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, with 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; 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.

2. The anti-bending 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-bending gypsum board according to claim 1, 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%.

7. A method for preparing a flex-resistant gypsum board according to any one of claims 1 to 6, 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.

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