Modeling gypsum board as well as preparation method and application thereof

Abstract

The invention provides a modeling gypsum board as well as a preparation method and application thereof. The modeling gypsum board comprises a gypsum core material and surface protection paper compounded on two sides of the gypsum core material, the gypsum core material is prepared from the following raw materials in parts by weight: 100 parts of gypsum, 0.5-50 parts of an adhesive and 0.5-10 parts of polymer fibers; 0.1 to 2 parts by weight of starch; 0.2 to 2 parts of a water reducing agent; 0-1 part of a reinforcing agent; 60 to 70 parts of water; the adhesive comprises more than two of an acrylate homopolymer, polymethyl acrylate, polybutyl acrylate, polyvinyl acetate, higher fatty acid vinyl ester, polyvinyl alcohol, vinyl acetate-ethylene copolymer emulsion, styrene-acrylic emulsion, pure acrylic emulsion, vinyl laurate and a copolymer of ethylene and vinyl chloride. According to the plasterboard disclosed by the invention, the plasterboard is deformed in a specific state by utilizing the ductility surface protection paper, the adhesive with different proportions and the polymer fibers, so that the requirement of artistic modeling is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of lightweight decorative building materials, and particularly relates to a shaped gypsum board, a preparation method thereof, and an application thereof. Background Art

[0002] In order to enhance the indoor aesthetic feeling, gypsum boards, as lightweight, high-strength and green decorative materials, are often used in decoration designs with arcs, curved surfaces, or even wavy ceiling or wall art shapes. Chinese Patent CN221194105U provides an arched gypsum line for indoor arc decoration. Japanese Patent JP3228561U forms mutually parallel and identical-width cutting grooves at the same interval on a single side of a paper-faced gypsum board, fills the cutting grooves with an adhesive, bends the gypsum board to form an arc, and adheres a non-combustible covering material to the inner surface of the arc to form a curved surface shape.

[0004] The existing art-shaped ceilings and walls have the following difficulties in actual application:

[0005] (1) The construction of art shapes is difficult, and the single-sided cutting grooves cause a significant reduction in the performance of the paper-faced gypsum board.

[0006] (2) Art-shaped boards need to be customized, resulting in a significant increase in production time and cost.

[0007] (3) Special-shaped gypsum boards are easily damaged during transportation.

[0008] Therefore, there is an urgent need to develop a gypsum board that not only has the properties of ordinary gypsum boards, such as easy production and transportation, but also is easy to construct and meets the requirements of various art shapes. Summary of the Invention

[0009] The purpose of the present invention is to provide a shaped gypsum board, a preparation method thereof, and an application thereof. The shaped gypsum board in the present invention can be deformed under specific conditions to meet the needs of art shapes.

[0010] The present invention provides a shaped gypsum board, comprising a gypsum core material and facing papers laminated on both sides of the gypsum core material;

[0011] The gypsum core material comprises the following preparation raw materials in parts by weight:

[0012] Gypsum: 100 parts, binder: 0.5 - 50 parts, polymer fiber: 0.5 - 20 parts; starch: 0.1 - 2 parts; water reducing agent: 0.2 - 2 parts; reinforcing agent: 0 - 1 part; water: 60 - 70 parts;

[0013] The binder includes two or more of acrylate homopolymer, polymethyl acrylate, polybutyl acrylate, polyvinyl acetate, vinyl higher fatty acid ester, polyvinyl alcohol, vinyl acetate-ethylene copolymer emulsion, styrene-acrylic emulsion, pure acrylic emulsion, copolymer of vinyl laurate with ethylene and vinyl chloride.

[0014] Preferably, the polymer fiber includes one or more of polyvinyl alcohol fiber, seaweed fiber, carboxymethyl fiber, vinyl chloride-polyvinyl alcohol graft copolymer fiber, polyvinyl acetal fiber.

[0015] Preferably, the starch includes one or more of acidified starch, pregelatinized starch and oxidized starch.

[0016] Preferably, the reinforcing agent includes bentonite and / or sodium silicate.

[0017] Preferably, the longitudinal tensile strength of the facing paper is ≥190 N, the transverse tensile strength is ≥60 N, and the air permeability is ≥2.0 μm / pa.s.

[0018] The present invention provides a method for preparing the shaped gypsum board as described above, comprising the following steps:

[0019] A) By weight, 100 parts of gypsum, 0.5 - 10 parts of polymer fiber, 0.5 - 50 parts of binder, 0.1 - 2 parts of starch, 0.2 - 2 parts of water reducing agent, 0 - 1 part of reinforcing agent and 60 - 70 parts of water are stirred and mixed to obtain a slurry;

[0020] B) The slurry is laid flat between two layers of facing paper, solidified and formed, and then dried to obtain the shaped gypsum board.

[0021] Preferably, the stirring speed in step A) is 240 - 450 r / min, and the stirring time in step A) is 0.1 - 0.5 min.

[0022] Preferably, the solidification temperature in step B) is 30 - 40 °C, and the solidification time in step B) is 210 - 240 s.

[0023] Preferably, the drying temperature in step B) is 110 - 320 °C, and the drying time in step B) is 30 - 50 min.

[0024] The present invention provides the application of the shaped gypsum board as described above in artistic shaping decoration. Water is sprayed on the surface of the shaped gypsum board as described above, pressure is applied to form the required shape, and then the shape is maintained and dried to obtain the gypsum board with the artistic shape.

[0025] The present invention provides a shaped gypsum board, which comprises a gypsum core material and facing papers laminated on both sides of the gypsum core material; the gypsum core material comprises the following raw materials in parts by weight for preparation: gypsum: 100 parts, binder: 0.5 - 50 parts, polymer fiber: 0.5 - 10 parts; starch: 0.1 - 2 parts by weight; water reducing agent: 0.2 - 2 parts; reinforcing agent: 0 - 1 part; water: 60 - 70 parts; the binder comprises two or more of acrylate homopolymer, polymethyl acrylate, polybutyl acrylate, polyvinyl acetate, vinyl higher fatty acid ester, polyvinyl alcohol, vinyl acetate-ethylene copolymer emulsion, styrene-acrylic emulsion, pure acrylic emulsion, copolymer of vinyl laurate, ethylene and vinyl chloride. The gypsum board in the present invention realizes the deformation of the gypsum board under specific conditions by using the ductile facing paper, binders with different ratios and polymer fibers, so as to meet the requirements of artistic shaping.

[0026] Furthermore, the gypsum board in the present invention can be formed into a curved surface or a wavy surface shape without processing and maintaining its original state in a short time, without subsequent construction measures such as seam correction or primer treatment, greatly improving the work efficiency and reducing the labor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0028] Figure 1 It is a picture of the shaped gypsum board in the present invention after being sprayed with water;

[0029] Figure 2 It is a schematic diagram of the shaped gypsum board in Embodiment 1 of the present invention after being sprayed with water. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The present invention provides a shaped gypsum board, which comprises a gypsum core material and facing papers laminated on both sides of the gypsum core material;

[0031] The gypsum core material comprises the following raw materials in parts by weight for preparation:

[0032] Gypsum: 100 parts, binder: 0.5 - 50 parts, polymer fiber: 0.5 - 10 parts; starch: 0.1 - 2 parts by weight; water reducing agent: 0.2 - 2 parts; reinforcing agent: 0 - 1 part; water: 60 - 70 parts;

[0033] In the present invention, the binder comprises more than two of acrylate homopolymer, polymethyl acrylate, polybutyl acrylate, polyvinyl acetate, vinyl higher fatty acid ester, polyvinyl alcohol, vinyl acetate-ethylene copolymer emulsion, styrene-acrylic emulsion, pure acrylic emulsion, copolymer of vinyl laurate, ethylene and vinyl chloride; the weight parts of the binder are preferably 0.5 to 50 parts, more preferably 5 to 40 parts, such as 0.5 part, 1 part, 5 parts, 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, and are preferably in a range value with any of the above-mentioned values as the upper or lower limit.

[0034] In the present invention, the polymer fiber preferably comprises one or more of polyvinyl alcohol fiber, seaweed fiber, carboxymethyl fiber, vinyl chloride-polyvinyl alcohol graft copolymer fiber, polyvinyl acetal fiber; the weight parts of the polymer fiber are preferably 0.5 to 20 parts, more preferably 1 to 15 parts, such as 0.5 part, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, and are preferably in a range value with any of the above-mentioned values as the upper or lower limit.

[0035] In the present invention, the starch is preferably special starch, such as one or more of acidified starch, pregelatinized starch and oxidized starch, and the weight parts of the starch are preferably 0.1 to 2 parts, more preferably 0.5 to 1.5 parts, such as 0.1 part, 0.5 part, 1 part, 1.5 part, 2 parts, and are preferably in a range value with any of the above-mentioned values as the upper or lower limit.

[0036] In the present invention, the water reducing agent preferably comprises polycarboxylate water reducing agent; the weight parts of the water reducing agent are preferably 0.2 to 2 parts, more preferably 0.5 to 1.5 parts, such as 0.2 part, 0.5 part, 1 part, 1.5 part, 2 parts, and are preferably in a range value with any of the above-mentioned values as the upper or lower limit.

[0037] In the present invention, the strengthening agent is preferably bentonite and / or sodium silicate, and the weight parts of the strengthening agent are preferably 0 to 1 part, more preferably 0.1 to 0.8 part, such as 0 part, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, and are preferably in a range value with any of the above-mentioned values as the upper or lower limit.

[0038] In the present invention, the weight parts of the water are preferably 60 to 70 parts, more preferably 62 to 68 parts, such as 60 parts, 61 parts, 62 parts, 63 parts, 64 parts, 65 parts, 66 parts, 67 parts, 68 parts, 69 parts, 70 parts, and are preferably in a range value with any of the above-mentioned values as the upper or lower limit.

[0039] In the present invention, the longitudinal tensile strength of the facing paper is ≥190 N, the transverse tensile strength is ≥60 N, and the air permeability is ≥2.0 μm / pa.s.

[0040] In the present invention, the thickness of the gypsum core material is preferably 8 - 15 mm, more preferably 9 - 12 mm, such as 9.4 mm, and the thickness of the facing paper is preferably 0.1 - 0.3 m, more preferably 0.2 mm.

[0041] The present invention also provides a method for preparing the shaped gypsum board described above, comprising the following steps:

[0042] A) By weight, 100 parts of gypsum, 0.5 - 10 parts of polymer fiber, 0.5 - 50 parts of binder, 0.1 - 2 parts of starch, 0.2 - 2 parts of water reducing agent, 0 - 1 part of reinforcing agent, and 60 - 70 parts of water are stirred and mixed to obtain a slurry;

[0043] B) The slurry is spread between two layers of facing paper, solidified and formed, and then dried to obtain the shaped gypsum board.

[0044] In the present invention, the types and weight parts of the gypsum, polymer fiber, binder, starch, water reducing agent, reinforcing agent, and water are the same as those of the gypsum, polymer fiber, binder, starch, water reducing agent, reinforcing agent, and water described above, and will not be elaborated herein.

[0045] In the present invention, the rotation speed of the stirring and mixing is preferably 240 - 450 r / min, more preferably 200 - 400 r / min, such as 240 r / min, 250 r / min, 300 r / min, 350 r / min, 400 r / min, 450 r / min, and is preferably a range value with any of the above values as the upper or lower limit; the time of the stirring and mixing is preferably 0.1 - 0.5 min, more preferably 0.2 - 0.4 min.

[0046] In the present invention, the temperature of the solidification and forming is preferably 30 - 40 °C, and the time of the solidification and forming is preferably 210 - 240 s, more preferably 220 - 230 s.

[0047] In the present invention, the temperature of the drying is preferably 110 - 320 °C, more preferably 150 - 300 °C, such as 110 °C, 150 °C, 200 °C, 250 °C, 300 °C, 320 °C, and is preferably a range value with any of the above values as the upper or lower limit; the time of the drying is preferably 30 - 50 min, more preferably 35 - 45 min.

[0048] The present invention also provides an application of the above-mentioned shaped gypsum board in artistic shaping decoration. The specific steps are as follows: spraying water on the surface of the gypsum board, applying pressure to form a desired shape such as an arc or a wave shape, and drying under this shape to obtain the artistic shaped gypsum board.

[0049] In the present invention, the temperature of the drying is preferably 200 - 300 °C, more preferably 220 - 280 °C, such as 200 °C, 210 °C, 220 °C, 230 °C, 240 °C, 250 °C, 260 °C, 270 °C, 280 °C, 290 °C, 300 °C, preferably a range value with any of the above values as the upper or lower limit; the time of the drying is preferably 30 - 40 min.

[0050] The present invention provides a shaped gypsum board, which comprises a gypsum core material and facing papers laminated on both sides of the gypsum core material; the gypsum core material comprises the following raw materials in parts by weight for preparation: gypsum: 100 parts, binder: 0.5 - 50 parts, polymer fiber: 0.5 - 10 parts; starch: 0.1 - 2 parts by weight; water reducing agent: 0.2 - 2 parts; reinforcing agent: 0 - 1 part; water: 60 - 70 parts; the binder comprises two or more of acrylate homopolymer, polymethyl acrylate, polybutyl acrylate, polyvinyl acetate, higher fatty acid vinyl ester, polyvinyl alcohol, vinyl acetate-ethylene copolymer emulsion, styrene-acrylic emulsion, pure acrylic emulsion, vinyl laurate-ethylene-vinyl chloride copolymer. The gypsum board in the present invention realizes the deformation of the gypsum board under specific conditions by using the scheme of ductile facing paper, binders with different ratios and polymer fibers, so as to meet the artistic shaping requirements.

[0051] Furthermore, the gypsum board in the present invention can be formed into a curved surface or a wave surface shape in a short time without processing and maintaining its original state, without subsequent construction measures such as seam correction or primer treatment, greatly improving the work efficiency and reducing the labor cost.

[0052] In order to further illustrate the present invention, the following describes in detail a shaped gypsum board, its preparation method and application provided by the present invention in conjunction with embodiments, but it should not be construed as a limitation to the protection scope of the present invention.

[0053] Example 1

[0054] 100 parts by weight of building gypsum, 5 parts by weight of acrylate homopolymer, 10 parts by weight of polyvinyl acetate, 10 parts of a terpolymer of ethylene, vinyl chloride and vinyl laurate, 5 parts by weight of polyvinyl alcohol fiber, 1 part by weight of acidified starch, 0.5 part by weight of a polycarboxylate superplasticizer and 65 parts by weight of water were stirred in a blender at a speed of 300 r / min for 3 s until homogeneous to obtain a slurry; then the above slurry was evenly spread on the facing paper to form and solidify, and then entered a dryer for drying. The drying temperature was 210 °C and the drying time was 30 min to obtain a shaped gypsum board with a thickness of 10 mm.

[0055] The board was cut into strips with a length of 30 cm and a width of 5 cm. Water was evenly sprayed on the surface of the gypsum board, and pressure was applied at both ends of the strip to detect the bending performance. The test results showed that the radius of curvature was 15 cm and the radian was 114°.

[0056] Example 2

[0057] 100 parts by weight of building gypsum, 10 parts by weight of butyl acrylate, 10 parts by weight of ethylene-vinyl acetate copolymer emulsion, 10 parts of styrene-acrylic emulsion, 10 parts by weight of seaweed fiber, 1 part by weight of pregelatinized starch, 0.5 part by weight of a polycarboxylate superplasticizer and 65 parts by weight of water were stirred in a blender at a speed of 300 r / min for 3 s until homogeneous to obtain a slurry; then the above slurry was evenly spread on the facing paper to form and solidify, and then entered a dryer for drying. The drying temperature was 210 °C and the drying time was 30 min to obtain a shaped gypsum board with a thickness of 10 mm.

[0058] The board was cut into strips with a length of 30 cm and a width of 5 cm. Water was evenly sprayed on the surface of the gypsum board, and pressure was applied at both ends of the strip to detect the bending performance. The test results showed that the radius of curvature was 13 cm and the radian was 127.8°.

[0059] Example 3

[0060] 100 parts by weight of building gypsum, 20 parts by weight of butyl acrylate, 10 parts by weight of ethylene-vinyl acetate copolymer emulsion, 10 parts of a copolymer of ethylene, vinyl chloride and vinyl laurate, 10 parts by weight of seaweed fiber, 10 parts by weight of polyvinyl alcohol fiber, 1 part by weight of pregelatinized starch, 0.5 part by weight of a polycarboxylate superplasticizer and 65 parts by weight of water were stirred in a blender at a speed of 300 r / min for 3 s until homogeneous to obtain a slurry; then the above slurry was evenly spread on the facing paper to form and solidify, and then entered a dryer for drying. The drying temperature was 210 °C and the drying time was 30 min to obtain a shaped gypsum board with a thickness of 10 mm.

[0061] The board was cut into strips with a length of 30 cm and a width of 5 cm. Water was evenly sprayed on the surface of the gypsum board, and pressure was applied at both ends of the strip to detect the bending performance. The test results showed that the radius of curvature was 11 cm and the radian was 156.5°.

[0062] Example 4

[0063] 100 parts by weight of building gypsum, 5 parts by weight of butyl acrylate, 4 parts by weight of ethylene-vinyl acetate copolymer emulsion, 4 parts of styrene-acrylic emulsion, 1 part by weight of polyvinyl alcohol fiber, 1 part by weight of pregelatinized starch, 0.5 part by weight of naphthalene-based high-range water reducer and 65 parts by weight of water were stirred in a blender at a speed of 300 r / min for 3 s until uniform to obtain a slurry; then the above slurry was evenly spread on the facing paper, formed and solidified, and then entered a dryer for drying. The drying temperature was 210 °C and the drying time was 30 min to obtain a shaped gypsum board with a thickness of 10 mm.

[0064] The board was cut into strips with a length of 30 cm and a width of 5 cm, the surface of the gypsum board was evenly sprayed with water, and pressure was applied at both ends of the strip for bending performance testing. The test results showed that the radius of curvature was 18 cm and the radian was 95.5°.

[0065] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A shaped gypsum board, comprising a gypsum core material and a facing paper composited on both sides of the gypsum core material; The gypsum core material comprises the following raw materials in parts by weight: Gypsum: 100 parts, adhesive: 0.5-50 parts, polymer fiber: 0.5-20 parts; Starch: 0.1-2 parts; Water reducing agent: 0.2-2 parts; Strengthening agent: 0-1 parts; Water: 60-70 parts; The adhesive comprises two or more of acrylate homopolymer, polymethyl acrylate, polybutyl acrylate, polyvinyl acetate, higher fatty acid vinyl ester, polyvinyl alcohol, vinyl acetate-ethylene copolymer emulsion, styrene acrylic emulsion, pure acrylic emulsion, copolymer of vinyl silicate and ethylene and vinyl chloride.

2. The shaped gypsum board according to claim 1, characterized in that: The polymer fiber includes one or more of polyvinyl alcohol fiber, seaweed fiber, carboxymethyl fiber, vinyl chloride-polyvinyl alcohol graft copolymer fiber, and polyvinyl acetal fiber.

3. The shaped gypsum board according to claim 1, characterized in that: The starch includes one or more of acidified starch, pregelatinized starch and oxidized starch.

4. The shaped gypsum board according to claim 1, characterized in that: The reinforcing agent includes bentonite and / or sodium silicate.

5. The shaped gypsum board according to claim 1, characterized in that: The longitudinal tensile strength of the face paper is ≥190N, the transverse tensile strength is ≥60N, and the air permeability is ≥2.0μm / pa.s.

6. A method for preparing a shaped gypsum board as claimed in claim 1, comprising the following steps: A) by weight, 100 parts of gypsum, 0.5-10 parts of polymer fiber, 0.5-50 parts of binder, 0.1-2 parts of starch, 0.2-2 parts of water reducer, 0-1 parts of reinforcing agent and 60-70 parts of water are stirred and mixed to obtain a slurry; B) spreading the slurry between two layers of facing paper to solidify and shape the slurry, and then drying the slurry to obtain a gypsum board.

7. The preparation method according to claim 6, characterized in that: The rotation speed of the stirring and mixing in the step A) is 240-450 r / min, and the time of the stirring and mixing in the step A) is 0.1-0.5 min.

8. The preparation method according to claim 6, characterized in that: The curing temperature in step B) is 30-40° C., and the curing time in step B) is 210-240 seconds.

9. The preparation method according to claim 6, characterized in that: The drying temperature in step B) is 110-320° C., and the drying time in step B) is 30-50 minutes.

10. The use of the shaped gypsum board according to any one of claims 1 to 5 in artistic decoration, characterized in that: The artistically shaped gypsum board is obtained by spraying water on the surface of the shaped gypsum board according to any one of claims 1 to 5, applying pressure to form a desired shape, and then maintaining the shape and drying.

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