Matte anti-reflection back-coated white board

Abstract

The utility model belongs to the technical field of office teaching aids, discloses a back-coated white board with a matte anti-reflection function, and aims to solve the problems that a traditional white board is strong in reflection, easy to scratch, inconvenient to install and the like. The white board comprises a base material layer, a matte film layer and a wear-resistant protective layer are sequentially arranged on the front face of the base material layer in a stacked mode, a back glue layer is arranged on the back face of the base material layer, a release paper layer is compounded at the bottom end of the back glue layer, the matte film layer is formed by blending polyurethane modified acrylic resin and silicon dioxide particles, and the surface of the matte film layer is subjected to micro-etching treatment to form a diffuse reflection structure. The base material layer is of a honeycomb aluminum plate structure, the edge of the base material layer is coated with an ABS plastic frame, and magnetic strips are embedded in the base material layer. Through the design of the composite layer, low reflection, high wear resistance, light weight and convenience in installation are realized, and the composite layer is suitable for various scenes such as education, office and the like.

Description

Technical Field

[0001] This utility model belongs to the technical field of office and teaching equipment, specifically relating to a whiteboard with a matte anti-reflective backing film. Background Technology

[0002] Whiteboards, as a common writing tool, are widely used in education, offices, and other settings. Traditional whiteboards typically use painted metal panels or hard plastic panels as the writing surface, which are smooth and flat, meeting basic writing and erasing needs.

[0003] However, in practical use, traditional whiteboards have the following problems: First, the surface is highly reflective, especially under sunlight or artificial light, making it difficult to read the written content due to mirror reflection. Users need to frequently adjust their viewing angle to avoid glare, affecting the user experience. Second, the surface is not wear-resistant enough and is easily scratched by hard objects after long-term use. Scratches not only affect the appearance but may also leave marker marks that are difficult to clean thoroughly. Third, ink penetration is a prominent problem. If it is not wiped off in time after writing, the ink can easily seep into the micropores or scratches on the board surface, making it difficult to erase and forming permanent stains. Fourth, the installation method is limited, usually requiring bolts or brackets for fixation. The installation process is cumbersome, and disassembly can easily leave marks on the wall, making it inconvenient for temporary use or relocation. Fifth, the substrate is mostly solid board, which is heavy and increases the difficulty of transportation and hanging.

[0004] In the prior art, for example, a patent published on the patent website with publication number CN210190951 entitled "A New Type of Flexible Whiteboard that is Easy to Wipe and Print". Its design improves portability by setting a PET film layer and a flexible support layer, but its surface is still a glossy structure, and the reflection problem has not been effectively solved. In addition, the adhesion and repeatability of the adhesive layer have not been optimized.

[0005] Therefore, there is an urgent need for a whiteboard structure that can comprehensively solve the problems of glare, scratches, installation, and weight. Utility Model Content

[0006] The purpose of this utility model is to provide a matte anti-reflective backed whiteboard to overcome the defects of existing whiteboards, such as strong reflection, easy scratching, inconvenient installation, and bulky materials.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A matte anti-reflective back-coated whiteboard includes a substrate layer, on the front side of which a matte coating layer and a wear-resistant protective layer are stacked in sequence, and on the back side of which an adhesive layer is provided, and a release paper layer is laminated at the bottom of the adhesive layer.

[0009] Furthermore, the matte coating layer is made of polyurethane-modified acrylic resin and silica particles, and its surface is micro-etched to form a diffuse reflection structure, so as to reduce the surface reflectivity and improve the visibility of the written content.

[0010] Furthermore, the wear-resistant protective layer is made of alumina-reinforced polycarbonate, which has high hardness and wear resistance, and can effectively prevent surface scratches.

[0011] Furthermore, the substrate layer is a honeycomb aluminum plate structure, filled with closed-cell foamed polyethylene, and the edges are covered with ABS plastic frames to achieve a balance between lightweight and high strength.

[0012] Furthermore, the adhesive backing layer is an acrylic pressure-sensitive adhesive layer with a matrix of breathable micropores on its surface, which facilitates the removal of air bubbles during installation and supports quick bonding and repeated positioning.

[0013] Furthermore, a slot is provided on the inner side of the ABS plastic frame, and a magnetic strip is embedded in the slot to enhance the functionality of the whiteboard.

[0014] Compared with existing technologies, the matte anti-reflective back-coated whiteboard of this utility model has the following significant advantages:

[0015] Point 1: This utility model effectively reduces surface reflection and improves visual comfort by using the diffuse reflection structure of the matte coating layer and the matting effect of silica particles.

[0016] Point 2: The high hardness design of the wear-resistant protective layer in this utility model significantly improves scratch resistance and extends the service life of the whiteboard;

[0017] Point 3: The breathable microporous design of the adhesive backing layer in this utility model, combined with controllable peeling force, enables rapid installation and residue-free disassembly.

[0018] Point 4: The honeycomb aluminum plate substrate of this utility model combines lightweight and strength, and with the magnetic strip design, it expands the application scenarios of the whiteboard.

[0019] Point 5: This utility model, through the synergistic effect of the matte coating layer and the wear-resistant protective layer, effectively blocks the ink penetration path and improves the surface's oleophobic and anti-fouling properties. Even if it has not been wiped for a long time or has been used frequently, it can still achieve "looking new after wiping", completely eliminating the problem of scratch residue on traditional whiteboards and ensuring that the board surface is as clean as ever. 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, wherein:

[0021] Figure 1 This is a schematic cross-sectional view of the layered structure of this utility model.

[0022] In the diagram: 1. Substrate layer; 2. Matte coating layer; 3. Wear-resistant protective layer; 4. Adhesive backing layer; 5. Release paper layer; 6. ABS plastic frame; 7. Breathable micropores; 8. Card slot; 9. Magnetic strip. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 This utility model provides a technical solution: a matte anti-reflective back-coated whiteboard, comprising a substrate layer 1, wherein a matte coating layer 2 and a wear-resistant protective layer 3 are sequentially stacked on the front side of the substrate layer 1, and an adhesive backing layer 4 is disposed on the back side of the substrate layer 1, wherein a release paper layer 5 is laminated at the bottom end of the adhesive backing layer 4; the matte coating layer 2 is made of polyurethane modified acrylic resin and silica particles, and its surface is micro-etched to form a diffuse reflection structure.

[0025] The substrate layer 1 is a honeycomb aluminum plate structure, filled with closed-cell foamed polyethylene, and the edges are covered with ABS plastic frames 6.

[0026] The wear-resistant protective layer 3 is made of alumina-reinforced polycarbonate.

[0027] The backing layer 4 is an acrylic pressure-sensitive adhesive layer with a matrix of breathable micropores 7 on its surface.

[0028] The inner side of the ABS plastic frame 6 is provided with a slot 8, and a magnetic strip 9 is embedded in the slot 8.

[0029] In actual manufacturing, the following steps are followed:

[0030] Step 1: Preparation of the matte coating layer. By weight, take 70 parts of polyurethane-modified acrylic resin, 15 parts of silica particles (8μm particle size), 6 parts of silicone matting agent, and 2 parts of fluorocarbon leveling agent. Place them in a high-speed disperser and stir at 1200 r / min for 30 min to form a uniform slurry. Apply the slurry to the front side of substrate layer 1 using a precision coating machine, with a wet film thickness of 0.5 mm. After pre-baking at 80℃ for 5 min, transfer it to a UV curing machine (wavelength 365nm, power 800mJ / cm²) for curing. Subsequently, use plasma treatment equipment (power 200W, treatment time 30s) to micro-etch the surface, forming a diffuse reflection structure with a surface roughness Ra=2.2μm.

[0031] After rigorous testing at the factory, the results are as follows: the specular reflectivity (60° incident angle) of the matte coating is 28.5%, the abrasion resistance (Taber abrasion tester, CS-10 wheel, 500g load, 1000 rpm) has a mass loss of ≤0.05g, and the adhesion (cross-cut test) is grade 0.

[0032] Step 2: Preparation of the substrate layer. A 0.8mm thick 5052 aluminum alloy panel is selected, and the interlayer is filled with a closed-cell foamed polyethylene core material with a density of 40kg / m³. A honeycomb aluminum panel with a total thickness of 5mm is produced by hot-pressing composite process (temperature 160℃, pressure 1.5MPa, time 10min). The edges are covered with ABS plastic frame 6 by injection molding process. A 2mm wide and 1.5mm deep groove 8 is opened on the inner side of the frame to embed a 1.5mm thick neodymium iron boron magnetic strip 9 with a magnetic induction intensity of 850Gs.

[0033] After rigorous testing at the factory, the results are as follows: the unit area weight of the substrate layer is 2.3 kg / m², the bending strength (three-point bending method) is ≥45 MPa, and the corner impact resistance (1 kg steel ball falling freely from a height of 1 m) shows no deformation or cracking.

[0034] Step 3: Preparation of the adhesive backing layer. A 60% solids acrylic pressure-sensitive adhesive is coated onto the surface of the release paper layer 5, with a wet film thickness of 0.4 mm. After drying at 100℃, the adhesive backing layer 4 is formed. A laser drilling machine (wavelength 1064 nm, power 20 W) is used to process a matrix arrangement of breathable micropores 7 with a diameter of 80 μm and a spacing of 1.5 mm on the surface of the adhesive backing layer, resulting in a pore density of approximately 400 pores / cm².

[0035] After rigorous testing at the factory, the results are as follows: the initial tack (25mm wide adhesive strip) of the adhesive backing layer is 12.5N, the peel force (180° peel test) is 0.8N / 25mm, the tack retention rate is 92% after repeated tearing and pasting 50 times, and the air permeability (water vapor transmission rate) is ≥500g / m²·24h.

[0036] Step 4: Overall assembly and testing. The matte coating layer 2 and the wear-resistant protective layer 3 are sequentially bonded to the front of the substrate layer 1 using hot melt adhesive. The backing layer 4 and the release paper layer 5 are bonded to the back of the substrate layer. Finally, the ABS frame 6 and the magnetic strip 9 are assembled to produce a finished whiteboard with a size of 1200mm×800mm.

[0037] After rigorous factory testing, the results are as follows: 1) Under a 1000 lux mixed light source environment, there was no glare interference when observed from multiple angles at a distance of 2m from the whiteboard; 2) Writing with an oil-based marker was smooth and the writing was clear, leaving no residue after wiping; 3) After peeling off the release paper layer 5, the whiteboard could be firmly pasted onto a latex-painted wall, and there were no glue residues after removal; 4) The magnetic strip could stably attract an A4-sized iron file box weighing ≤500g; 5) In a simulated real-world usage scenario, the whiteboard underwent 1000 consecutive oil-based marker writing-wiping cycles, and the results showed no penetrating residue on the board surface. The surface roughness (Ra value) change after wiping was ≤0.1μm, verifying its significant advantage of "no residue after long-term use".

[0038] The present invention has been verified through the above-mentioned implementation tests to have excellent anti-reflective properties, wear resistance and ease of installation, and is suitable for a variety of practical scenarios.

[0039] Compared with existing technologies, the matte anti-reflective back-coated whiteboard of this utility model has the following significant advantages:

[0040] Point 1: This utility model effectively reduces surface reflection and improves visual comfort by using the diffuse reflection structure of the matte coating layer and the matting effect of silica particles.

[0041] Point 2: The high hardness design of the wear-resistant protective layer in this utility model significantly improves scratch resistance and extends the service life of the whiteboard;

[0042] Point 3: The breathable microporous design of the adhesive backing layer in this utility model, combined with controllable peeling force, enables rapid installation and residue-free disassembly.

[0043] Point 4: The honeycomb aluminum plate substrate of this utility model combines lightweight and strength, and with the magnetic strip design, it expands the application scenarios of the whiteboard.

[0044] Point 5: This utility model, through the synergistic effect of the matte coating layer and the wear-resistant protective layer, effectively blocks the ink penetration path and improves the surface's oleophobic and anti-fouling properties. Even if it has not been wiped for a long time or has been used frequently, it can still achieve "looking new after wiping", completely eliminating the problem of scratch residue on traditional whiteboards and ensuring that the board surface is as clean as ever.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A matte anti-reflective back-coated whiteboard, comprising a substrate layer (1), characterized in that, The front side of the substrate layer (1) is provided with a matte coating layer (2) and a wear-resistant protective layer (3) stacked in sequence. The back side of the substrate layer (1) is provided with an adhesive layer (4). The bottom end of the adhesive layer (4) is laminated with a release paper layer (5). The surface of the matte coating layer (2) is micro-etched to form a diffuse reflection structure.

2. The matte anti-reflective backing film whiteboard according to claim 1, characterized in that, The substrate layer (1) is a honeycomb aluminum plate structure, filled with closed-cell foamed polyethylene, and the edges are covered with ABS plastic frames (6).

3. A matte anti-reflective backing film whiteboard according to claim 1, characterized in that, The wear-resistant protective layer (3) is made of alumina-reinforced polycarbonate.

4. A matte anti-reflective backing film whiteboard according to claim 1, characterized in that, The backing layer (4) is an acrylic pressure-sensitive adhesive layer with a matrix of breathable micropores (7) on its surface.

5. A matte anti-reflective backing film whiteboard according to claim 2, characterized in that, The inner side of the ABS plastic frame (6) is provided with a slot (8), and a magnetic strip (9) is embedded in the slot (8).

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