Antistatic calcium sulfate plate and preparation method thereof

Abstract

The invention discloses an antistatic calcium sulfate plate and a preparation method thereof. The antistatic calcium sulfate plate comprises a UV conductive wear-resistant layer, a UV conductive topcoat layer, a pattern layer, a first UV conductive primer layer, a putty layer, a first UV penetrant layer, a calcium sulfate substrate layer, a second UV penetrant layer, a second UV conductive primer layer, an adhesive layer and a color-coated plate which are sequentially connected from top to bottom. The antistatic calcium sulfate plate has the characteristics of excellent water resistance, corrosion resistance, wear resistance and high conductivity. In addition, the surface layer of the antistatic calcium sulfate plate has no adhesive layer, which effectively avoids the problem of warping and hollowing of the surface layer of the plate due to the shedding of glue.

Description

Technical Field

[0001] The invention relates to the technical field of plates, and in particular to an antistatic calcium sulfate plate and a preparation method thereof. Background Art

[0002] Anti-static floor is also called dissipative static floor. The working principle of static floor is to conduct static electricity into the ground through the layer of material on the surface of the floor. As we all know, the earth is a medium for transmitting static electricity, and static floor is a device that connects the earth with the static electricity generated in the workplace. It is widely used in various professional computer rooms such as computer centers, communication centers, data centers, radio and television transmission centers, power control and dispatching centers, microwave communication stations, satellite ground stations, mobile communications, program-controlled telephone exchanges, radio and television editing and control, integrated circuits and other computer, communication, electronic, optical equipment production workshops, hospital operating rooms, anesthesia rooms, electronic imaging examination rooms and other flammable and explosive places such as military industry, petrochemicals, etc. that are sensitive to static electricity, as well as cultural and entertainment centers, star-rated hotels, intelligent office buildings, etc.

[0003] The anti-static floors currently used are mainly all-steel anti-static floors and calcium sulfate anti-static floors. The bottom plate of the all-steel anti-static floor is made of deep-grade drawn steel plate, and the panel is made of hard SPCC steel plate. The upper and lower steel plates are stamped and spot welded. The surface is phosphated and then sprayed. The middle shell is filled with foamed cement. After maintenance, a stable bearing structure is formed. The upper surface can be pasted with highly wear-resistant anti-static HPL veneer; the calcium sulfate anti-static floor uses a calcium sulfate substrate, and the top is glued with ordinary PVC surface HPL surface and anti-ceramic floor tiles. The side is wrapped with ABS or PVC anti-static decorative strips. The above two types of floors are equipped with networked bracket square tube beams and screws for assembly. In addition, the surface layer of the anti-static floor adopts spray adhesive bonding technology, which still has many problems. The sprayed glue is easy to burn and explode in the air, and it will also produce a lot of formaldehyde. If steel plates, PVC, HPL and other surface layers are attached to the floor for a long time, the glue will fall off, causing the surface layer to warp and hollow; it will also cause the floor to make abnormal noises and fail to dissipate static electricity completely, failing to achieve a true anti-static effect and causing equipment failure; if steel plates are used, they will rust over time, and the bearing capacity will not meet the requirements, making it easy for safety accidents such as floor collapse to occur. Summary of the invention

[0004] The object of the present invention is to provide an antistatic calcium sulfate plate and a preparation method thereof. The antistatic calcium sulfate plate of the present invention has the characteristics of excellent water resistance, corrosion resistance, wear resistance and high conductivity through the arrangement of various layers. In addition, the surface layer of the antistatic calcium sulfate plate has no adhesive layer, which effectively avoids the problem of warping and hollowing of the surface layer of the plate due to the shedding of glue.

[0005] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted:

[0006] A first aspect of the present invention provides an antistatic calcium sulfate board, which includes a UV conductive wear-resistant layer, a UV conductive topcoat layer, a pattern layer, a first UV conductive primer layer, a putty layer, a first UV penetrant layer, a calcium sulfate substrate layer, a second UV penetrant layer, a second UV conductive primer layer, an adhesive layer and a color-coated board, which are sequentially connected from top to bottom.

[0007] In the present invention, the use of the antistatic calcium sulfate board is not strictly limited. For example, it can be used in any site scenario according to the required board performance requirements; specifically, the antistatic calcium sulfate board of the present invention can be used as a floor or a wall panel.

[0008] Preferably, the antistatic calcium sulfate sheet further comprises a third UV penetrant layer and a third UV conductive primer layer;

[0009] The third UV permeant layer is arranged on the side of the calcium sulfate substrate layer;

[0010] The third UV conductive primer layer is disposed on the outer side of the third permeant layer.

[0011] Preferably, the material of the UV conductive wear-resistant layer is XL-TD2023 epoxy acrylate resin; the material of the UV conductive topcoat layer is XL-LT203 photocurable resin; the material of the pattern layer is XL-SS200 photocurable resin; the material of the first UV conductive primer layer, the second UV conductive primer layer and the third UV conductive primer layer are XL-NM550 photocurable resin; the material of the first UV penetrant layer, the second UV penetrant layer and the third UV penetrant layer are XL-DQ202 photocurable resin; the material of the adhesive layer is polyvinyl alcohol.

[0012] Preferably, the thickness of the UV conductive wear-resistant layer is 0.1-0.2 mm; the thickness of the UV conductive topcoat layer is 0.08-0.12 mm; the thickness of the patterned layer is 0.03-0.08 mm; the thickness of the putty layer is 0.1-0.3 mm; the thickness of the first UV conductive primer layer, the second UV conductive primer layer and the third UV conductive primer layer is 0.08-0.12 mm; the thickness of the first UV penetrant layer, the second UV penetrant layer and the third UV penetrant layer is 0.01-0.12 mm; the thickness of the adhesive layer is 0.1-0.3 mm.

[0013] A second aspect of the present invention provides a method for preparing an antistatic calcium sulfate plate, the preparation method comprising the following steps:

[0014] (a) sanding and dust removal of the bottom surface of the calcium sulfate substrate, then laying a UV penetrant and drying it to form a second UV penetrant layer, laying a UV conductive primer on the surface of the second UV penetrant layer and drying it to form a second UV conductive primer layer; and bonding a color-coated plate on the surface of the second UV conductive primer layer to obtain a bottom surface processed plate;

[0015] (b) sanding and dusting the side of the bottom surface processed plate, then laying a UV penetrant and drying it to form a third UV penetrant layer, laying a UV conductive primer on the surface of the third UV penetrant layer and drying it to form a third UV conductive primer layer, and obtaining a side surface processed plate;

[0016] (c) sanding and dusting the top surface of the side processed plate, then laying a UV penetrant and drying it to form a first UV penetrant layer, applying putty on the surface of the first UV penetrant layer and drying it to form a putty layer, sanding and dusting the surface of the putty layer, then laying a UV conductive primer and drying it to form a first UV conductive primer layer, printing a pattern on the surface of the first UV conductive primer layer to form a pattern layer, laying a UV conductive topcoat on the surface of the pattern layer and drying it to form a UV conductive topcoat layer, laying a UV conductive wear-resistant coating on the surface of the UV conductive topcoat layer and drying it to form a UV conductive wear-resistant layer, and obtaining the antistatic calcium sulfate sheet.

[0017] Preferably, the calcium sulfate substrate is obtained by pressing gypsum under high pressure conditions of 400T.

[0018] Preferably, the gypsum is phosphogypsum, desulfurized gypsum, titanium gypsum or natural gypsum.

[0019] Preferably, the sandpaper used for sanding has a mesh number of 400.

[0020] Preferably, the putty is dried by infrared irradiation.

[0021] Preferably, the UV penetrant, UV conductive primer, UV conductive topcoat and UV conductive wear-resistant coating are dried by ultraviolet irradiation.

[0022] Compared with the prior art, the beneficial effects of the present invention include at least:

[0023] The antistatic calcium sulfate board of the invention has the characteristics of excellent water resistance, corrosion resistance, wear resistance and high conductivity. In addition, the surface layer of the antistatic calcium sulfate board has no adhesive layer, which effectively avoids the problem of warping and hollowing of the board surface layer due to glue falling off.

[0024] In the preparation method of the present invention, the calcium sulfate substrate layer is formed by high pressure in a 400t hydraulic press, and the density of the product is not high. It can be sawed and planed, and can be widely used as overhead panels for public buildings and civil buildings or as household assembled floor heating panels. In addition, in the preparation method of the present invention, a UV penetration process is used on the surface, bottom surface and side surface of the standard substrate to allow the UV penetrant layer to be firmly bonded to the calcium sulfate substrate, thereby ensuring the isolation of the calcium sulfate substrate from the outside air and achieving a waterproof and moisture-proof effect; and putty is used to fill the UV penetrant layer to ensure that the board has no Porosity defects; UV conductive primer, printed patterns, and UV conductive topcoat are laid on the putty surface in sequence to ensure the beauty and conductive performance of the board, and at the same time, a conductive environmentally friendly UV conductive wear-resistant layer is rolled on the UV conductive topcoat to ensure the high wear resistance, corrosion resistance, water resistance and high conductivity of the board; then, a color-coated board is pasted on the bottom of the board to increase the concentrated load and limit load of the board; the anti-static calcium sulfate board prepared by the preparation method of the present invention has the characteristics of high water resistance, corrosion resistance, no peeling and dusting, high conductivity, beautiful appearance, high wear resistance and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0026] Figure 1 This is a schematic diagram of the explosion structure of the antistatic calcium sulfate plate according to an embodiment of the present invention;

[0027] In the attached figure, 1 is an antistatic calcium sulfate board; 2 is a UV conductive wear-resistant layer; 3 is a UV conductive topcoat layer; 4 is a pattern layer; 5 is a first UV conductive primer layer; 6 is a putty layer; 7 is a first UV penetrant layer; 8 is a calcium sulfate substrate layer; 9 is a second UV penetrant layer; 10 is a second UV conductive primer layer; 11 is an adhesive layer; 12 is a color-coated board; 13 is a third UV penetrant layer; 14 is a third UV conductive primer layer. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0029] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the invention belongs.

[0030] like Figure 1As shown, an embodiment of the present invention provides an antistatic calcium sulfate board, which includes a UV conductive wear-resistant layer 2, a UV conductive topcoat layer 3, a pattern layer 4, a first UV conductive primer layer 5, a putty layer 6, a first UV penetrant layer 7, a calcium sulfate substrate layer 8, a second UV penetrant layer 9, a second UV conductive primer layer 10, an adhesive layer 11 and a color-coated board 12, which are sequentially connected from top to bottom.

[0031] In one embodiment, the antistatic calcium sulfate sheet further includes a third UV penetrant layer 13 and a third UV conductive primer layer 14;

[0032] The third UV penetrant layer 13 is disposed on the side of the calcium sulfate substrate layer 8;

[0033] The third UV conductive primer layer 14 is disposed on the outer side of the third permeant layer 13 .

[0034] In the antistatic calcium sulfate board 1 of the present invention, the first UV penetrant layer 7, the second UV penetrant layer 9 and the third UV penetrant layer 13 are arranged to completely isolate the calcium sulfate substrate layer 8 from the outside world, thereby achieving the purpose of waterproofing and moisture-proofing, and the putty layer 6 can fill the surface of the first UV penetrant layer 7 to ensure that the board has no pore defects and better improve the sealing effect; on the surface of the putty layer 6, a conductive and environmentally friendly first UV conductive primer layer 5, a pattern layer 4, and a UV conductive topcoat layer 3 are formed to ensure the beauty and conductive performance of the board, and at the same time, a conductive and environmentally friendly UV conductive wear-resistant layer 2 is rolled on the UV conductive topcoat layer 3 to ensure high wear resistance, corrosion resistance, waterproofness and high conductivity of the board; and a second UV conductive primer layer 10, an adhesive layer 11 and a color-coated board are sequentially formed on the surface of the second UV penetrant layer 9, which can improve the conductive performance, as well as the concentrated load and limit load of the board.

[0035] The present invention does not impose strict restrictions on the materials of each layer. For example, conventional materials in the field can be selected according to actual needs. In one embodiment, the material of the UV conductive wear-resistant layer 2 can be XL-TD2023 epoxy acrylate resin; the material of the UV conductive topcoat layer 3 can be XL-LT203 photocurable resin; the material of the pattern layer 4 can be XL-SS200 photocurable resin; the material of the first UV conductive primer layer 5, the second UV conductive primer layer 10 and the third UV conductive primer layer 14 can be XL-NM550 photocurable resin; the material of the first UV penetrant layer 7, the second UV penetrant layer 9 and the third UV penetrant layer 13 can be XL-DQ202 photocurable resin; the material of the adhesive layer can be polyvinyl alcohol.

[0036] In some embodiments, the thickness of the UV conductive wear-resistant layer 2 can be any value between 0.1 and 0.2 mm, specifically 0.1 mm, 0.15 mm or 0.2 mm; the thickness of the UV conductive topcoat layer 3 can be any value between 0.08 and 0.12 mm, specifically 0.08 mm, 0.1 mm or 0.12 mm; the thickness of the pattern layer 4 can be any value between 0.03 and 0.08 mm, specifically 0.03 mm, 0.05 mm or 0.08 mm; the thickness of the putty layer 6 can be any value between 0.1 and 0.3 mm, specifically 0.1 mm, 0.2 mm or 0.3 mm; the first UV conductive primer ... The thickness of the paint layer 5, the second UV conductive primer layer 10 and the third UV conductive primer layer 14 can be any value between 0.08 and 0.12 mm, specifically, any value between 0.08 mm, 0.1 mm and 0.12 mm; the thickness of the first UV penetrant layer 7, the second UV penetrant layer 9 and the third UV penetrant layer 13 can be any value between 0.08 and 0.12 mm, specifically, any value between 0.08 mm, 0.1 mm and 0.12 mm; the thickness of the adhesive layer 11 can be any value between 0.1 and 0.3 mm, specifically, 0.1 mm, 0.2 mm or 0.3 mm.

[0037] The embodiment of the present invention also provides a method for preparing an antistatic calcium sulfate plate, the preparation method comprising the following steps:

[0038] (a) sanding and dust removal of the bottom surface of the calcium sulfate substrate, then laying a UV penetrant and drying it to form a second UV penetrant layer, laying a UV conductive primer on the surface of the second UV penetrant layer and drying it to form a second UV conductive primer layer; and bonding a color-coated plate on the surface of the second UV conductive primer layer to obtain a bottom surface processed plate;

[0039] (b) sanding and dusting the side of the bottom surface processed plate, then laying a UV penetrant and drying it to form a third UV penetrant layer, laying a UV conductive primer on the surface of the third UV penetrant layer and drying it to form a third UV conductive primer layer, and obtaining a side surface processed plate;

[0040] (c) sanding and dusting the top surface of the side processed plate, then laying a UV penetrant and drying it to form a first UV penetrant layer, applying putty on the surface of the first UV penetrant layer and drying it to form a putty layer, then sanding and dusting the surface of the putty layer, then laying a UV conductive primer and drying it to form a first UV conductive primer layer, printing a pattern on the surface of the first UV conductive primer layer to form a pattern layer, laying a UV conductive topcoat on the surface of the pattern layer and drying it to form a UV conductive topcoat layer, laying a UV conductive wear-resistant coating on the surface of the UV conductive topcoat layer and drying it to form a UV conductive wear-resistant layer, and then laminating the surface of the UV conductive wear-resistant layer to form a protective film layer, thereby obtaining the antistatic calcium sulfate sheet.

[0041] In one embodiment, the calcium sulfate base layer 8 is obtained by pressing gypsum under a high pressure condition of 400T.

[0042] The present invention does not impose strict restrictions on the type of gypsum. For example, conventional gypsum in the art can be selected according to actual needs. Specifically, in one embodiment, the gypsum is phosphogypsum. In other embodiments, the gypsum can also be any one of desulfurized gypsum, titanium gypsum and natural gypsum.

[0043] In order to improve the sanding effect, in one embodiment, the sandpaper used for sanding has a mesh number of 400.

[0044] In one embodiment, the putty is dried by infrared irradiation.

[0045] In one embodiment, the UV penetrant, UV conductive primer, UV conductive topcoat and UV conductive wear-resistant coating are dried by ultraviolet irradiation.

[0046] The technical solution of the present invention is further described in detail below through specific embodiments.

[0047] Example 1

[0048] This embodiment is an antistatic calcium sulfate plate. Figure 1 As shown, the antistatic calcium sulfate board 1 includes a UV conductive wear-resistant layer 2, a UV conductive topcoat layer 3, a pattern layer 4, a first UV conductive primer layer 5, a putty layer 6, a first UV penetrant layer 7, a calcium sulfate substrate layer 8, a second UV penetrant layer 9, a second UV conductive primer layer 10, an adhesive layer 11 and a color-coated board 12 connected in sequence from top to bottom;

[0049] The antistatic calcium sulfate plate 1 further includes a third UV penetrant layer 13 and a third UV conductive primer layer 14;

[0050] The third UV penetrant layer 13 is disposed on the side of the calcium sulfate substrate layer 8;

[0051] The third UV conductive primer layer 14 is disposed on the outer side of the third permeant layer 13 .

[0052] Example 2

[0053] This embodiment is a method for preparing an antistatic calcium sulfate plate, and the preparation method comprises the following steps:

[0054] (a) under a high pressure of 400 tons, phosphogypsum is pressed by a top and bottom water filtering method to obtain a calcium sulfate substrate, and after natural curing for 48 hours, it is dried at 180° C. and processed to size to obtain a calcium sulfate substrate layer 8;

[0055] The bottom surface of the calcium sulfate substrate layer 8 is sanded and dusted with 400-mesh sandpaper, and then a double-roll coater is used to lay a UV penetrant on the bottom surface of the calcium sulfate substrate, and then the UV dryer is used for drying to form a second UV penetrant layer 9, and an infrared leveling machine is used to lay a UV conductive primer on the surface of the second UV penetrant layer 9 and dry it with a UV dryer to form a second UV conductive primer layer 10; and then a glue is sprayed on the surface of the second UV conductive primer layer 10 to form an adhesive layer 11, and then a color-coated plate 12 is bonded to obtain a bottom surface processed plate;

[0056] (b) The side of the bottom surface processed plate is sanded and dusted with 400-mesh sandpaper, and then a UV penetrant is laid with a double-roll coater and placed in a UV dryer for drying to form a third UV penetrant layer 13, and a UV conductive primer is laid on the surface of the third UV penetrant layer 13 with an infrared leveling machine and dried with a UV dryer to form a third UV conductive primer layer 14, thereby obtaining a side surface processed plate;

[0057] (c) The top surface of the side processing plate is sanded and dusted with 400 mu sandpaper, and then, a double-roll coating machine is used to lay UV penetrant and placed in a UV dryer for drying to form a first UV penetrant layer 7, putty is coated on the surface of the first UV penetrant layer 7 and dried by infrared irradiation to form a putty layer 6, and then the surface of the putty layer 6 is sanded and dusted with 400 mu sandpaper, and then, a UV conductive primer is laid with an infrared leveling machine and placed in a UV dryer for drying to form a first UV conductive primer layer 5, a pattern is printed on the surface of the first UV conductive primer layer to form a pattern layer 4, a UV conductive topcoat is laid on the surface of the pattern layer 4 with an infrared leveling machine and placed in a UV dryer for drying to form a UV conductive topcoat layer 3, a UV conductive wear-resistant coating is laid on the surface of the UV conductive topcoat layer 3 with an infrared leveling machine and placed in a UV dryer for drying to form a UV conductive wear-resistant layer 2, and the above-mentioned antistatic calcium sulfate board 1 is obtained.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. An antistatic calcium sulfate plate, characterized in that: The antistatic calcium sulfate board comprises a UV conductive wear-resistant layer, a UV conductive topcoat layer, a pattern layer, a first UV conductive primer layer, a putty layer, a first UV penetrant layer, a calcium sulfate substrate layer, a second UV penetrant layer, a second UV conductive primer layer, an adhesive layer and a color-coated board connected in sequence from top to bottom; The antistatic calcium sulfate sheet further includes a third UV penetrant layer and a third UV conductive primer layer; The third UV permeant layer is arranged on the side of the calcium sulfate substrate layer; The third UV conductive primer layer is disposed on the outer side of the third UV permeant layer; The material of the UV conductive wear-resistant layer is XL-TD2023 epoxy acrylate resin; the material of the UV conductive topcoat layer is XL-LT203 photocurable resin; the material of the pattern layer is XL-SS200 photocurable resin; the material of the first UV conductive primer layer, the second UV conductive primer layer and the third UV conductive primer layer are XL-NM550 photocurable resin; the material of the first UV penetrant layer, the second UV penetrant layer and the third UV penetrant layer are XL-DQ202 photocurable resin; the material of the adhesive layer is polyvinyl alcohol; The thickness of the UV conductive wear-resistant layer is 0.1~0.2mm; the thickness of the UV conductive topcoat layer is 0.08~0.12mm; the thickness of the pattern layer is 0.03~0.08mm; the thickness of the putty layer is 0.1~0.3mm; the thickness of the first UV conductive primer layer, the second UV conductive primer layer and the third UV conductive primer layer is 0.08~0.12mm; the thickness of the first UV penetrant layer, the second UV penetrant layer and the third UV penetrant layer is 0.01~0.12mm; the thickness of the adhesive layer is 0.1~0.3mm.

2. The method for preparing the antistatic calcium sulfate sheet material according to claim 1, characterized in that: The steps include: (a) sanding and dust removal of the bottom surface of the calcium sulfate substrate, then laying a UV penetrant and drying it to form a second UV penetrant layer, laying a UV conductive primer on the surface of the second UV penetrant layer and drying it to form a second UV conductive primer layer; Then, a color-coated plate is bonded on the surface of the second UV conductive primer layer to obtain a bottom surface processed plate; (b) sanding and dusting the side of the bottom surface processed board, then laying a UV penetrant and drying it to form a third UV penetrant layer, laying a UV conductive primer on the surface of the third UV penetrant layer and drying it to form a third UV conductive primer layer, and obtaining a side surface processed board; (c) Sanding and dusting the top surface of the side processed plate, then laying a UV penetrant and drying it to form a first UV penetrant layer, applying putty on the surface of the first UV penetrant layer and drying it to form a putty layer, then sanding and dusting the surface of the putty layer, then laying a UV conductive primer and drying it to form a first UV conductive primer layer, printing a pattern on the surface of the first UV conductive primer layer to form a pattern layer, laying a UV conductive topcoat on the surface of the pattern layer and drying it to form a UV conductive topcoat layer, laying a UV conductive wear-resistant coating on the surface of the UV conductive topcoat layer and drying it to form a UV conductive wear-resistant layer, and thus obtaining the antistatic calcium sulfate board.

3. The preparation method according to claim 2, characterized in that: The calcium sulfate substrate is obtained by pressing gypsum under a high pressure condition of 400T.

4. The preparation method according to claim 3, characterized in that: The gypsum is phosphogypsum, desulfurized gypsum, titanium gypsum or natural gypsum.

5. The preparation method according to claim 2, characterized in that: The sandpaper mesh number used for the sanding is 400 meshes.

6. The preparation method according to claim 2, characterized in that: The putty is dried by infrared irradiation.

7. The preparation method according to claim 2, characterized in that: The UV penetrant, UV conductive primer, UV conductive topcoat and UV conductive wear-resistant coating are dried by ultraviolet irradiation.

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