Decorative gypsum board

Abstract

The utility model relates to building material technical field, concretely relates to a kind of decorative gypsum board, including decorative layer, first gypsum board face paper, gypsum board core and second gypsum board face paper set gradually, and heating layer is arranged between decorative layer and first gypsum board face paper;Heating layer includes heating film and conducting strip, and conducting strip is electrically connected in heating film both sides and forms closed loop;Heating film and first gypsum board face paper between being provided with elastic buffer layer;A pair of opposite side of gypsum board core each is provided with at least two tensioning positioning structure, and the edge of heating film is tensioned fixed by tensioning positioning structure.The utility model can solve the problem that heating film and gypsum board thermal expansion difference lead to wrinkle separation and film loose curl under mechanical impact.

Description

Technical Field

[0001] This utility model relates to the field of building materials technology, specifically to a decorative gypsum board. Background Technology

[0002] Gypsum board, as a lightweight, sound-insulating, heat-insulating, and easy-to-process building material, is widely used in interior walls, ceilings, and decorative surfaces. Traditional gypsum board only has basic decorative functions and cannot meet the combined needs of dehumidification, heating, and health therapy in humid southern regions.

[0003] To address the aforementioned issues, patent CN217293792U proposes a heat-generating decorative gypsum board. This board utilizes a heating layer (including a heating film and conductive strips) between the decorative layer and the first gypsum board facing paper. The infrared radiation from the heating film provides heating and therapeutic functions, thus mitigating the limitations of traditional gypsum boards in terms of functionality. However, this solution still has structural limitations in practical applications.

[0004] Firstly, the thermal expansion coefficients of the heating film (such as graphene, carbon crystal, etc.) and the gypsum board are quite different. During long-term heating-cooling cycles, the interface is prone to wrinkles or even detachment due to stress, which affects the uniformity of heating and the flatness of the decorative layer.

[0005] Secondly, the heating film relies solely on adhesive bonding and side positioning structures for fixation, making it prone to loosening and edge curling during transportation or installation due to mechanical impact.

[0006] The aforementioned problems limit the durability and stability of heat-generating decorative gypsum boards, and urgently require optimization and improvement. Utility Model Content

[0007] In view of this, the purpose of this utility model is to provide a decorative gypsum board to solve the problems of wrinkle separation caused by the thermal expansion difference between the heating film and the gypsum board, and film loosening and curling under mechanical impact.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A decorative gypsum board includes a decorative layer, a first gypsum board facing paper, a gypsum board core, and a second gypsum board facing paper arranged sequentially. A heating layer is disposed between the decorative layer and the first gypsum board facing paper. The heating layer includes a heating film and a conductive strip, the conductive strip being electrically connected to both sides of the heating film to form a closed circuit. An elastic buffer layer is disposed between the heating film and the first gypsum board facing paper. At least two tensioning and positioning structures are provided on each of a pair of opposite sides of the gypsum board core, and the edges of the heating film are tensioned and fixed by the tensioning and positioning structures.

[0010] As a further embodiment of this utility model: the elastic buffer layer is a porous elastic material layer with uniformly distributed micro-protrusions on its surface.

[0011] As a further improvement of this invention, the material of the elastic buffer layer is EVA foam or silicone.

[0012] As a further embodiment of this utility model: the tensioning and positioning structure includes a base, a spring, and a hook embedded in the side of the gypsum board core; one end of the base is connected to the gypsum board core; one end of the spring is fixed to the base, and the other end is connected to the hook; the edge of the heating film is provided with a positioning hole that matches the hook, and the hook passes through the positioning hole and is tensioned by the tension of the spring to tighten the heating film.

[0013] As a further embodiment of this invention: wherein the heating film is a graphene film or a carbon crystal film.

[0014] As a further embodiment of this utility model: the conductive strip is fixed to the edge of the heating film by a pressing structure, and the pressing structure is disposed below the tensioning and positioning structure.

[0015] As a further embodiment of this utility model: the pressing structure is L-shaped, with one straight side inserted into the side of the gypsum board core and the other straight side extending between the heating layer and the decorative layer and abutting against the outside of the conductive strip.

[0016] By adopting the above technical solution, this utility model will have the following beneficial effects:

[0017] 1. By adding an elastic buffer layer between the heating film and the first gypsum board facing paper, the flexible properties of the buffer layer absorb the interfacial stress caused by the difference in the coefficients of thermal expansion between the heating film and the gypsum board, effectively alleviating the problem of film wrinkling or detachment caused by shear force during long-term heating-cooling cycles, and ensuring the uniformity of heating and the flatness of the decorative layer.

[0018] 2. By setting a tensioning and positioning structure on the side of the gypsum board core, the edge of the heating film is actively tensioned by spring tension, which avoids the film from loosening or curling due to mechanical impact during transportation or installation, thereby improving the reliability and stability of film fixation.

[0019] Compared with existing technologies, this utility model effectively solves the problems of wrinkle separation caused by the thermal expansion difference between the heating film and the gypsum board, as well as film loosening and curling under mechanical impact, through the synergistic effect of the elastic buffer layer and the tensioning positioning structure, thus significantly improving the product's durability and stability in use. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front view of the decorative gypsum board described in an embodiment of the present utility model;

[0022] Figure 2 for Figure 1 Sectional view along the middle AA direction;

[0023] Figure 3 for Figure 2 A partial view of the tensioning and positioning structure.

[0024] The correspondence between the labels and component names in the attached figures is as follows:

[0025] 10. Decorative layer; 20. First gypsum board facing paper; 30. Gypsum board core; 31. Tensioning and positioning structure; 311. Base; 312. Spring; 313. Hook; 32. Pressing structure; 40. Second gypsum board facing paper; 50. Heating layer; 51. Heating film; 52. Conductive strip; 60. Elastic buffer layer. Detailed Implementation

[0026] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the following description is to be considered exemplary in nature and not restrictive.

[0027] refer to Figure 1 and Figure 2 In one embodiment of the decorative gypsum board provided by this utility model, the decorative gypsum board includes a decorative layer 10, a heating layer 50, an elastic buffer layer 60, a first gypsum board facing paper 20, a gypsum board core 30, and a second gypsum board facing paper 40, which are stacked sequentially.

[0028] Decorative layer 10: A 0.3mm thick waterproof decorative membrane (with wood grain pattern printed on the surface) extends to the side of the gypsum board core 30 and covers the edge structure (tension positioning structure 31 and pressing structure 32).

[0029] Heating layer 50: includes a graphene heating film 51 (thickness 0.1mm, resistivity 10Ω·cm) and a copper conductive strip 52 (width 5mm, thickness 0.05mm). The conductive strip 52 is fixed to both sides of the heating film 51 by a pressing structure 32 and connected to an external power source to form a closed circuit (voltage 24V safe voltage).

[0030] Elastic buffer layer 60: Located between the heating film 51 and the first gypsum board facing paper 20, it is made of 0.8mm thick EVA foam (density 30kg / m³), with hemispherical micro-convex structures (diameter 0.2mm, spacing 1mm) evenly distributed on the surface, and is bonded to the first gypsum board facing paper 20 through a high-temperature resistant adhesive layer (acrylic adhesive, thickness 0.1mm);

[0031] Gypsum board core 30: It is formed by casting building gypsum, and two tensioning and positioning structures 31 (a total of four) are set on each of the two opposite sides (left and right sides) to fix the edge of the heating film 51.

[0032] refer to Figure 3 The tensioning and positioning structure 31 in this embodiment includes a base 311, a spring 312, and a hook 313. The base 311 is a cylindrical insulating plastic part (5mm in diameter and 8mm in depth), which is pre-embedded during the casting of the gypsum board core 30 and integrally formed with the core. The spring 312 is a stainless steel helical spring (3mm in diameter, 10mm in free length, and 0.5N / mm in elasticity). One end is fixed to the bottom of the base 311 with epoxy resin, and the other end is welded with a hook 313. The hook 313 is an L-shaped stainless steel hook. Four positioning holes (2mm in diameter) are pre-drilled on the edge of the heating film 51, which correspond to the hooks 313 respectively. After the hooks 313 pass through the positioning holes, the spring 312 generates a tension of about 2N due to stretching, which tensions the heating film 51 above the first gypsum board facing paper 20 to ensure no wrinkles.

[0033] As a preferred embodiment, the pressing structure 32 is disposed below the tensioning and positioning structure 31 (to avoid affecting the tensioning and positioning structure) and is used to fix the conductive strip 52. The pressing structure 32 is an L-shaped insulating plastic part (1mm thick). One straight edge (horizontal section) of the pressing structure 32 is inserted into a pre-made slot (2mm wide, 1mm deep) on the side of the gypsum board core 30, and the other straight edge (vertical section) extends between the heating layer 50 and the decorative layer 10 and abuts against the outside of the conductive strip 52. After the horizontal section of the pressing structure 32 is inserted into the slot, the vertical section applies a pressure of about 0.3N to the conductive strip 52 through its own elasticity (micro-deformation of the plastic part), ensuring that the conductive strip 52 is tightly attached to the heating film 51. The decorative layer 10 covers the outside of the pressing structure 32 to prevent it from loosening.

[0034] As a preferred embodiment, the material of the elastic buffer layer 60 can be replaced by silicone material (Shore hardness A30, thickness 0.6mm), with a micro-convex surface structure in the shape of a pyramid (height 0.2mm, base length 0.3mm). The high elasticity of silicone can more effectively absorb the difference in thermal expansion between the heating film 51 and the gypsum board, and buffer the interfacial stress through its own compression deformation, thus preventing the adhesive layer between the heating film 51 and the first gypsum board facing paper 20 from cracking.

[0035] As a preferred embodiment, the heating film 51 can be replaced by a carbon crystal film (0.15 mm thick, 8 Ω·cm resistivity) with an infrared emissivity ≥0.85 (better than the 0.82 of the graphene film), making it more suitable for scenarios requiring strong therapeutic functions (such as a home bedroom). After the carbon crystal film is energized through the conductive strip 52, its surface temperature rises uniformly to 35~40℃ (safe temperature), achieving indoor heating and human physiotherapy through infrared radiation.

[0036] The method of use or working principle of this utility model is as follows:

[0037] During installation, the edge of the heating film 51 is fixed by the tensioning and positioning structure 31 on the side of the gypsum board core 30. Specifically, the hook 313 passes through the positioning hole of the heating film 51, and the spring 312 generates tension due to stretching, actively tensioning the heating film 51 to make it flat and wrinkle-free. The elastic buffer layer 60 is located between the heating film 51 and the first gypsum board facing paper 20. Through the flexible properties of the porous elastic material, it absorbs the interfacial stress caused by the difference in thermal expansion coefficients between the heating film 51 and the gypsum board, preventing the film from wrinkling or detaching during long-term heating-cooling cycles. The conductive strip 52 is fixed to the edge of the heating film 51 by the pressing structure 32, ensuring close contact with the film.

[0038] In use, the conductive strip 52 connects to an external power source to form a closed circuit. After the heating film 51 is energized, it generates infrared radiation heat, realizing indoor heating and physiotherapy functions. The spring 312 of the tensioning and positioning structure 31 continuously maintains the tension of the film, and the elastic buffer layer 60 dynamically buffers thermal stress, jointly ensuring the uniformity of heating and the flatness of the decorative layer, solving the problems of easy wrinkling and unreliable fixation of the film in the prior art.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A decorative gypsum board, comprising a decorative layer (10), a first gypsum board facing paper (20), a gypsum board core (30), and a second gypsum board facing paper (40) arranged sequentially, wherein a heating layer (50) is disposed between the decorative layer (10) and the first gypsum board facing paper (20); the heating layer (50) comprises a heating film (51) and a conductive strip (52), wherein the conductive strip (52) is electrically connected to both sides of the heating film (51) and forms a closed circuit; characterized in that, An elastic buffer layer (60) is provided between the heating film (51) and the first gypsum board facing paper (20); at least two tensioning and positioning structures (31) are provided on each of the pair of opposite sides of the gypsum board core (30), and the edge of the heating film (51) is tensioned and fixed by the tensioning and positioning structures (31).

2. The decorative gypsum board according to claim 1, characterized in that, The elastic buffer layer (60) is a porous elastic material layer with uniformly distributed micro-protrusions on its surface.

3. The decorative gypsum board according to claim 2, characterized in that, The elastic buffer layer (60) is made of EVA foam or silicone.

4. The decorative gypsum board according to claim 1, characterized in that, The tensioning and positioning structure (31) includes a base (311), a spring (312), and a hook (313) embedded in the side of the gypsum board core (30); one end of the base (311) is connected to the gypsum board core (30); one end of the spring (312) is fixed to the base (311), and the other end is connected to the hook (313); the edge of the heating film (51) is provided with a positioning hole that matches the hook (313), and the hook (313) passes through the positioning hole and is tensioned by the tension of the spring (312) to tighten the heating film (51).

5. The decorative gypsum board according to claim 1, characterized in that, The heating film (51) is a graphene film or a carbon crystal film.

6. The decorative gypsum board according to claim 1, characterized in that, The conductive strip (52) is fixed to the edge of the heating film (51) by a pressing structure (32), which is located below the tensioning and positioning structure (31).

7. The decorative gypsum board according to claim 6, characterized in that, The pressing structure (32) is L-shaped. One side of the pressing structure (32) is inserted into the side of the gypsum board core (30), and the other straight side extends into the space between the heating layer (50) and the decorative layer (10) and abuts against the outside of the conductive strip (52).

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