阅读说明：本技术 一种纸面石膏板及其制备方法 (Paper-surface gypsum board and preparation method thereof ) 是由 李伯洋 鞠宏胜 姚运家 田野 杨海涛 于 2021-09-10 设计创作，主要内容包括：本申请公开了一种纸面石膏板。所述的纸面石膏板,包括板芯和护面纸,所述板芯的原料包括：石膏熟料、发泡剂、板型淀粉、粘接淀粉、减水剂、缓凝剂、乳液和玻璃纤维。该石膏板强度高韧性好,并且此种石膏板制备工艺简单,便于大规模生产。(The application discloses thistle board. Thistle board, including board core and mask paper, the raw materials of board core include: gypsum clinker, foaming agent, plate type starch, bonding starch, water reducing agent, retarder, emulsion and glass fiber. The gypsum board has high strength and good toughness, and the preparation process of the gypsum board is simple and is convenient for large-scale production.)

1. The utility model provides a thistle board, includes the mask paper in board core and the board core outside, the raw materials of board core include: gypsum clinker, foaming agent, plate type starch, bonding starch, water reducing agent, retarder, emulsion and glass fiber.

2. The gypsum plaster board of claim 1 wherein the raw materials for the core are gypsum clinker, foaming agent, board type starch, bonding starch, water reducing agent, retarder, emulsion and glass fiber in a weight ratio of (55 to 60) to (0.005 to 0.01) to (0.05 to 0.15) to (0.3 to 0.4) to (0.1 to 0.2) to (0.005 to 0.01) to (1 to 2) to (0.3 to 0.6);

optionally, the board core raw material further comprises water, and the weight ratio of the gypsum clinker to the water is (55-60) to (30-40).

3. The paper-faced gypsum board of claim 1, wherein the foaming agent is selected from anionic surfactants, optionally, the foaming agent is selected from basfGYP 3550、GYP 2680、GYP 3110、SASN 812 or sodium lauryl sulfate.

4. The gypsum plasterboard of claim 1, wherein the water reducing agent is selected from one or more of a polycarboxylic acid-based water reducing agent and a melamine-type sulfonated polycondensate water reducing agent.

5. The gypsum plasterboard of claim 1, wherein the glass fibre has a length of 5mm to 15 mm.

6. The paper-faced gypsum board of any one of claims 1-5, wherein the binding starch has a viscosity of from 1000 to 5000 mPa-s;

optionally, the binding starch is a modified corn starch.

7. The paper-faced gypsum board of any one of claims 1-5, wherein the set retarder is selected from one or more of citric acid, magnesium citrate, magnesium hexametaphosphate, borax, lignosulfonate, sodium carboxymethylcellulose, hydroxyethylcellulose, and phosphoric acid and protein-based set retarders;

the protein gypsum retarder is one or two of a bone glue protein retarder and a protein gypsum retarder formed by calcium calcification of degraded polyamide.

8. The gypsum plasterboard of any one of claims 1 to 5, wherein the emulsion is a styrene-butadiene emulsion; preferably, the emulsion is an 8482 emulsion.

9. The gypsum plasterboard of any one of claims 1 to 5, wherein the plate type starch has a molecular weight of less than 16000, an alkaline flow of 14 to 20s, a moisture content of < 12 wt.% in the plate type starch, and a pH of 5 to 8.

10. The gypsum plasterboard of claim 9, wherein the board type starch is selected from one or more of pre-gelatinized modified corn starch, pre-gelatinized modified tapioca starch and pre-gelatinized modified potato starch.

Technical Field

The present invention relates to, but is not limited to, building material technology, and particularly relates to, but is not limited to, a gypsum plasterboard and a preparation method thereof.

Background

The paper-surface gypsum board is a board made up by using building gypsum as main raw material, adding proper quantity of additive and fibre as core, using specially-made board paper as protective surface and making them pass through a certain preparation process. The paper-surface gypsum board has the characteristics of light weight, sound insulation, heat insulation, strong processability and simple and convenient construction method. The building block has the advantages of light weight, fire resistance, sound insulation, heat preservation, heat insulation, strong processability (capable of being planed, nailed and sawed), convenient construction, good detachability, enlarged use area and the like, thereby being widely used for various industrial buildings and civil buildings, and particularly being used as an inner wall material and a decorative finishing material in high-rise buildings. Such as: the wall-mounted ceiling board is used for non-bearing walls, indoor veneers, suspended ceilings and the like in a cabinet frame structure.

However, the paper-surface gypsum board has poor strength and toughness due to the characteristics of the gypsum raw material, and is difficult to meet all application scenes, so that a new building material product cannot be developed based on the gypsum board. Thus, improving the physical properties of gypsum boards is a hot point of research.

Disclosure of Invention

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the present application.

The application provides a gypsum plaster board and preparation and application thereof, in particular to a gypsum plaster board with higher physical properties, the gypsum plaster board has high strength and good toughness, and the gypsum plaster board has simple preparation process and is convenient for large-scale production.

The emulsion is introduced into the paper-surface gypsum board, and the gypsum board obtains higher physical properties through the synergistic effect of the emulsion and other components.

The application provides a thistle board, including board core and mask paper, the raw materials of board core include: gypsum clinker, foaming agent, plate type starch, bonding starch, water reducing agent, retarder, emulsion and glass fiber.

In one embodiment provided herein, the weight ratio of gypsum clinker, foaming agent, board starch, bonding starch, water reducer, retarder, emulsion and glass fiber in the raw materials of the board core is (55 to 60): 0.005 to 0.01): 0.05 to 0.15): 0.3 to 0.4): 0.1 to 0.2): 0.005 to 0.01): 1 to 2): 0.3 to 0.6;

in one embodiment provided herein, the board core raw material further comprises water, and the weight ratio of the gypsum clinker to the water is (55 to 60): (30 to 40).

In one embodiment provided herein, the foaming agent is selected from anionic surfactants, optionally, the foaming agent is selected from basfGYP 3550、GYP 2680、GYP 3110、SASN 812 or sodium lauryl sulfate.

In one embodiment provided herein, the water reducing agent is selected from one or more of a polycarboxylic acid-based water reducing agent and a melamine-based sulfonated polycondensate water reducing agent.

In one embodiment provided herein, the glass fibers have a length of 5mm to 15 mm.

In one embodiment provided herein, the binding starch has a viscosity of 1000 to 5000 mPa-s;

in one embodiment provided herein, the binding starch is a modified corn starch.

In one embodiment provided herein, the retarder is selected from one or more of citric acid, magnesium citrate, magnesium hexametaphosphate, borax, lignosulfonate, sodium carboxymethyl cellulose, hydroxyethyl cellulose and phosphoric acid and a protein-based retarder;

the protein gypsum retarder is one or two of a bone glue protein retarder and a protein gypsum retarder formed by calcium calcification of degraded polyamide;

in one embodiment provided herein, the emulsion is a styrene-butadiene emulsion; preferably, the emulsion is an 8482 emulsion.

In one embodiment provided herein, the plate-type starch is selected from one or more of pregelatinized modified corn starch, pregelatinized modified tapioca starch, and pregelatinized modified potato starch;

the molecular weight of the plate-type starch is less than 16000, the alkaline fluidity of the plate-type starch is 14s to 20s, the moisture content in the plate-type starch is less than 12 wt.%, and the pH value of the plate-type starch is 5 to 8.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the invention in its aspects as described in the specification.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application are described in detail below. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

In this example, the blowing agent isSASN 812 orGYP 3110, available from basf (china) ltd;

the plate-type starch is pre-gelatinized modified corn starch and is purchased from Shandong adhesive company Limited; an average molecular weight of less than 16000, an alkaline fluidity of 16-17s, a moisture content of 10.44 wt.%, and a pH of 6 to 7.

The bonding starch is modified corn starch and is purchased from Shandong all-in-the-year adhesive company Limited;

the viscosity of the modified corn starch was 4250mpa.s, test method: weighing about 27.00 g starch to an accuracy of 0.01 g, placing into a 500ml tall beaker, adding 450ml deionizationDissolving in water, heating and stirring with electromagnetic stirrer, taking off the beaker when the time is up to 15 min, and measuring viscosity eta with rotational viscosity meter₁In pa.s, the mean was taken from three measurements. Standing at room temperature, cooling to 20 + -1 deg.C, and measuring viscosity eta by rotary viscometer₂And measuring three times and taking an average value to obtain the viscosity of the modified corn starch, wherein the unit is Pa.S.

The water reducing agent is a 312 water reducing agent which is a polycarboxylic acid water reducing agent and is purchased from Basff (China) Limited company under the trademark Melflux Plus 312;

the retarder is lignosulfonate liquid retarder and is purchased from Guangdong Longhu science and technology GmbH;

the emulsion is 8482 emulsion which is purchased from Vinamul8482 brand of Beijing Kammit science and technology development GmbH;

the glass fiber is 6mm chopped glass fiber which is purchased from China megalithic corporation, ECS13-06-546YF brand.

Example 1

58 parts of gypsum clinker, 0.01 part of foaming agent, 0.09 part of plate type starch, 0.33 part of bonding starch, 0.15 part of water reducing agent, 0.01 part of retarder, 1.46 parts of emulsion and 0.44 part of glass fiber; taking 34 parts by weight of water;

the preparation method of the paper-surface gypsum board comprises the following steps:

the gypsum plaster board drying method comprises the steps of uniformly mixing raw materials through a mixer to obtain gypsum slurry, conveying the gypsum slurry to lower protective paper, bonding the gypsum slurry with the upper protective paper through a plate forming machine to obtain an initial shape of the gypsum plaster board, finishing final setting in the conveying process of a belt conveyor, cutting the solidified and formed gypsum plaster board into corresponding specifications through a cutting machine, conveying the gypsum plaster board to a drying machine through a belt roller after inspection and plate turning, and drying through a two-step drying method (the gypsum plaster board firstly enters a first zone, the inlet temperature of the first zone is about 210 ℃ for drying for 40min, then enters a second zone, the inlet temperature of the second zone is about 130 ℃ for drying the gypsum plaster board to constant weight), sorting, automatically sealing edges, stacking, packaging and the like, and conveying the gypsum plaster board obtained from the drying machine to a warehouse after inspection is qualified.

Example 2

58 parts of gypsum clinker, 0.01 part of foaming agent, 0.09 part of plate-type starch, 0.30 part of bonding starch, 0.15 part of water reducing agent, 0.008 part of retarder, 1.47 parts of emulsion and 0.44 part of glass fiber; taking 34 parts by weight of pulp water;

the thistle board of this example was prepared in the same manner as in example 1.

Example 3

58 parts of gypsum clinker, 0.01 part of foaming agent, 0.11 part of plate type starch, 0.33 part of bonding starch, 0.15 part of water reducing agent, 0.01 part of retarder, 1.53 parts of emulsion and 0.44 part of glass fiber; taking 34 parts by weight of pulp water;

the thistle board of this example was prepared in the same manner as in example 1.

Example 4

58 parts of gypsum clinker, 0.01 part of foaming agent, 0.11 part of plate type starch, 0.33 part of bonding starch, 0.15 part of water reducing agent, 0.008 part of retarder, 1.46 parts of emulsion and 0.54 part of glass fiber; taking 34 parts by weight of pulp water;

the thistle board of this example was prepared in the same manner as in example 1.

Example 5

58 parts of gypsum clinker, 0.01 part of foaming agent, 0.10 part of plate type starch, 0.33 part of bonding starch, 0.17 part of water reducing agent, 0.01 part of retarder, 1.53 parts of emulsion and 0.54 part of glass fiber; taking 34 parts by weight of pulp water;

the thistle board of this example was prepared in the same manner as in example 1.

Comparative example 1

Comparative example 1, this comparative example differs from example 1 only in that no emulsion is added. The source and amount of other raw materials and the method of making the gypsum plasterboard are the same as in example 1.

Comparative example 2

Comparative example 1, which differs from example 1 only in that no water reducing agent is added. The source and amount of other raw materials and the method of making the gypsum plasterboard are the same as in example 1.

Comparative example 3

Comparative example 3, which differs from example 1 only in that no starch of the plate type is added. The source and amount of other raw materials and the method of making the gypsum plasterboard are the same as in example 1.

Comparative example 4

Comparative example 4, which differs from example 1 only in that no binding starch is added. The source and amount of other raw materials and the method of making the gypsum plasterboard are the same as in example 1.

TABLE 1 statistical table of mechanical Properties test of examples and comparative examples

Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.