A high-strength lightweight composite board

Abstract

The utility model discloses a kind of high-strength light-weight composite board, relating to composite board field, including protection frame and the composite board body being set to the inside of protection frame, the composite board body includes lightweight high-molecular substrate layer;High-strength fiber reinforced layer, the high-strength fiber reinforced layer is at least one surface of the lightweight high-molecular substrate layer is compounded;Bonding layer, the bonding layer is set between the lightweight high-molecular substrate layer and the high-strength fiber reinforced layer, the protection frame top end four corners are all set with jack, the protection frame bottom end four corners are all set with expansion slot, jack is automatically extended in the expansion slot inside by gravity, by lightweight high-molecular substrate layer adds hollow microbead, protection frame selects light-weight material, reinforcing layer ultrathin design, composite board overall density controllable, can greatly reduce wall self weight (reduce building structure load) in building field.

Description

Technical Field

[0001] This utility model relates to the field of composite panels, and in particular to a high-strength lightweight composite panel. Background Technology

[0002] In fields such as construction, transportation, logistics and warehousing, and outdoor facilities, sheet materials serve as core structural or decorative materials, and their performance directly affects the safety, economy, and service life of products.

[0003] Traditional installation relies on bolt fixing, welding, or adhesive bonding, which is not only complex (installing a 1m×2m panel requires 2-3 people and takes more than 30 minutes), but also suffers from large gaps (≥2mm) and poor flatness. This is especially inefficient in rapid construction scenarios such as exhibition booths and temporary partition walls. Furthermore, most panels lack dedicated protective structures, making them susceptible to damage from vibration and impacts during transportation or use.

[0004] Therefore, it is necessary to propose a high-strength, lightweight composite board to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a high-strength, lightweight composite board to solve the problem that most composite boards lack dedicated protective structures and are easily damaged by vibration and impact during transportation or use.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-strength lightweight composite board, comprising a protective frame and a composite board body disposed inside the protective frame, wherein the composite board body comprises a lightweight polymer substrate layer; A high-strength fiber-reinforced layer is laminated to at least one surface of the lightweight polymer substrate layer; An adhesive bonding layer is disposed between the lightweight polymer substrate layer and the high-strength fiber reinforcement layer; The protective frame has four insertion holes at the top corners and four expansion grooves at the bottom corners. Insert blocks automatically extend from the expansion grooves by gravity.

[0007] Preferably, the telescopic groove and the insertion hole are vertically corresponding, a limiting groove is extended on the outer side of the telescopic groove, and the telescopic groove and the limiting groove are connected; The insert is T-shaped, and the bottom end of the insert is inserted into the corresponding socket.

[0008] Preferably, both sides of the inner side of the protective frame are fixed with fitting pads. The cross-section of the fitting pads is set as a right triangle. One right-angled side of the right triangle is attached to the inner wall of the protective frame, and the other right-angled side of the right triangle is parallel to the ground.

[0009] Preferably, the composite board further includes a surface modification layer, which is disposed on the side of the high-strength fiber reinforcement layer away from the lightweight polymer substrate layer.

[0010] Preferably, the lightweight polymer substrate layer contains 5%-15% by mass of hollow microspheres, the particle size of which is 10μm-50μm.

[0011] Preferably, the thickness of the high-strength fiber reinforcement layer (203) is 0.1mm-0.5mm.

[0012] The technical effects and advantages of this utility model are as follows: 1. By adding hollow microspheres to a lightweight polymer substrate layer, using lightweight materials for the protective frame, and employing an ultra-thin reinforcing layer design, the overall density of the composite board can be controlled at 0.8g / cm³-1.2g / cm³, which is only 1 / 6-1 / 8 of that of traditional steel plates (7.85g / cm³) and 1 / 2-1 / 3 of that of concrete slabs (2.4g / cm³). In the construction field, this can significantly reduce the self-weight of the wall (reducing the structural load on the building).

[0013] 2. When two protective frames are stacked on top of each other, the insert block of the upper protective frame will naturally insert into the insert hole of the lower protective frame due to its own gravity, thus locking it and preventing lateral displacement. This makes it easier to stack or transport multiple composite panels. At the same time, lifting it upwards makes it easy to separate multiple protective frames.

[0014] 3. When a single protective frame is removed and placed on the platform, the insert at the bottom of the protective frame will automatically retract into the telescopic groove due to the pressure of the protective frame itself, so that the bottom surface of the protective frame contacts the platform, thus avoiding affecting subsequent operations. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the high-strength lightweight composite panel of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the interlocking soft pad of this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the composite panel body of this utility model.

[0018] Figure 4 This is a schematic diagram of the limiting groove of this utility model.

[0019] In the diagram: 1. Protective frame; 2. Composite board body; 201. Lightweight polymer substrate layer; 202. Adhesive bonding layer; 203. High-strength fiber reinforcement layer; 3. Insertion hole; 4. Insertion block; 5. Fitting pad; 6. Expansion groove; 7. Limiting groove. Detailed Implementation

[0020] This utility model provides, for example Figures 1-4 The high-strength lightweight composite panel shown includes a protective frame 1 and a composite panel body 2 disposed inside the protective frame 1. The composite panel body 2 includes a lightweight polymer substrate layer 201. The protective frame 1 is made of modified reinforced engineering plastic (such as glass fiber reinforced PP) or lightweight aluminum alloy, and the frame thickness is controlled between 1.5mm and 3mm to ensure its own impact resistance strength while avoiding excessive weight increase.

[0021] The lightweight polymer substrate layer 201 contains 5%-15% by weight of hollow microspheres, with a particle size of 10μm-50μm. The lightweight polymer substrate layer 201 uses high-density polyethylene (HDPE), polypropylene (PP), or ABS resin as the substrate, and adds 5%-15% by weight of hollow microspheres (preferably glass or ceramic hollow microspheres, with a true density of 0.2g / cm³-0.6g / cm³) through a melt blending process. The hollow microsphere particle size is controlled at 10μm-50μm, allowing for uniform dispersion in the substrate. This avoids a decrease in the mechanical properties of the substrate due to excessively large particle size and significantly reduces the substrate density through the "hollow structure" (weight reduction of 20%-35% compared to pure substrate). The substrate layer thickness is designed to be 3mm-15mm according to requirements, combining lightweight design with basic structural support. A high-strength fiber reinforcement layer 203 is laminated to at least one surface of the lightweight polymer substrate layer 201; carbon fiber, glass fiber or aramid fiber is selected as the reinforcing material and made into a unidirectional or bidirectional woven fabric with a thickness of 0.1mm-0.5mm (area density 20g / m²-50g / m²), which is laminated to one or both sides of the lightweight polymer substrate layer 201 (the strength is more significantly improved when laminated on both sides).

[0022] An adhesive bonding layer 202 is disposed between the lightweight polymer substrate layer 201 and the high-strength fiber reinforcement layer 203. It is applied using a two-component epoxy resin adhesive or polyurethane structural adhesive, with a coating thickness of 0.05mm-0.1mm. A hot-pressing composite process (temperature 80℃-120℃, pressure 0.5MPa-1MPa) achieves a tight bond between the lightweight polymer substrate layer 201 and the high-strength fiber reinforcement layer 203. This adhesive layer has a shear strength ≥15MPa, effectively transferring stress between the two layers and preventing interlayer delamination.

[0023] The protective frame 1 has four insertion holes 3 at the top corners and four telescopic grooves 6 at the bottom corners. Insert blocks 4 automatically extend from the telescopic grooves 6 under gravity. The inner diameter of the insertion holes 3 is designed to be 8mm-12mm, and the inner wall is smoothed (roughness Ra≤0.8μm) to facilitate the quick insertion of the insert blocks 4. The depth of the telescopic grooves 6 at the bottom corners is 2mm-3mm longer than the length of the insert blocks 4. The contact surface between the groove wall and the insert blocks 4 is coated with silicone-based grease to ensure that the insert blocks 4 extend smoothly under gravity.

[0024] When two protective frames 1 are stacked on top of each other, the insert 4 of the upper protective frame 1 will naturally insert into the insert 3 of the lower protective frame 1 under its own gravity, thus locking it and preventing lateral displacement. This makes it easier to stack or transport multiple composite board bodies 2. At the same time, lifting it upwards makes it easy to separate multiple protective frames 1.

[0025] When a single protective frame 1 is removed and placed on the platform, the insert 4 at the bottom of the protective frame 1 is affected by the pressure of the protective frame 1 itself, and the insert 4 will automatically retract into the telescopic groove 6, so that the bottom surface of the protective frame 1 contacts the platform, thus avoiding affecting subsequent operations.

[0026] The telescopic groove 6 and the insertion hole 3 are vertically aligned. A limiting groove 7 is extended on the outer side of the telescopic groove 6, and the telescopic groove 6 and the limiting groove 7 are connected. The insertion block 4 is T-shaped, and its bottom end is inserted into the insertion hole 3. The limiting groove 7 can prevent the insertion block 4 from extending completely out of the telescopic groove 6.

[0027] Both sides of the inner side of the protective frame 1 are fixed with fitting pads 5. The cross-section of the fitting pad 5 is a right triangle, with one right-angled side of the right triangle fitting against the inner wall of the protective frame 1, and the other right-angled side of the right triangle parallel to the ground. The fitting pads 5 are made of high-elasticity nitrile rubber or silicone. The composite panel body 2 is tightly fixed inside the protective frame 1 by elastic compression, which can buffer lateral and longitudinal vibration impacts. At the same time, due to the pointed end of the interlocking pad 5 and its smaller thickness at the top, the protective frame 1 and the composite panel body 2 can be separated by pushing the composite panel body 2 from the bottom up during disassembly.

[0028] The composite panel also includes a surface modification layer, which is disposed on the side of the high-strength fiber reinforcement layer 203 away from the lightweight polymer substrate layer 201. The surface modification layer is applied to the outside of the high-strength fiber reinforcement layer 203 through coating, spraying, or plasma treatment processes. For outdoor applications (such as building facades and container side panels), a fluorocarbon resin or polysiloxane coating is used, which improves the composite panel's weather resistance (UV aging resistance ≥3000h, salt spray corrosion resistance ≥5000h) and provides self-cleaning functionality (water contact angle ≥110°, stains are easily rinsed). For interior decoration or electronic device housings, an antibacterial modified epoxy resin coating is used. The thickness of the high-strength fiber reinforcement layer 203 is 0.1mm-0.5mm.

Claims

1. A high-strength, lightweight composite panel, comprising a protective frame (1) and a composite panel body (2) disposed inside the protective frame (1), characterized in that: The composite panel body (2) includes a lightweight polymer substrate layer (201). A high-strength fiber reinforcement layer (203) is laminated to at least one surface of the lightweight polymer substrate layer (201); An adhesive bonding layer (202) is disposed between the lightweight polymer substrate layer (201) and the high-strength fiber reinforcement layer (203); The protective frame (1) has four holes (3) at the top corners and four expansion grooves (6) at the bottom corners. Insert blocks (4) automatically extend from the expansion grooves (6) by gravity.

2. The high-strength lightweight composite board according to claim 1, characterized in that: The telescopic groove (6) and the insertion hole (3) are vertically corresponding. A limiting groove (7) is extended on the outside of the telescopic groove (6). The telescopic groove (6) and the limiting groove (7) are connected. The insert (4) is T-shaped, and the bottom end of the insert (4) is inserted into the corresponding socket (3).

3. The high-strength lightweight composite board according to claim 1, characterized in that: The protective frame (1) has two fitted pads (5) fixed inside. The cross section of the fitted pads (5) is set as a right triangle. One right-angled side of the right triangle is attached to the inner wall of the protective frame (1), and the other right-angled side of the right triangle is parallel to the ground.

4. The high-strength lightweight composite board according to claim 1, characterized in that: The composite board also includes a surface modification layer, which is disposed on the side of the high-strength fiber reinforcement layer (203) away from the lightweight polymer substrate layer (201).

5. A high-strength lightweight composite board according to claim 1, characterized in that: The lightweight polymer substrate layer (201) contains 5%-15% by mass hollow microspheres, the particle size of which is 10μm-50μm.

6. The high-strength lightweight composite board according to claim 1, characterized in that: The thickness of the high-strength fiber reinforcement layer (203) is 0.1mm-0.5mm.

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