Asphalt-based carbon plate having folding resistance

Abstract

The utility model relates to the technical field of pitch base carbon plate, and disclose a pitch base carbon plate with folding resistance, including first support board and second support board, be provided with the folding board between first support board and second support board, the folding board is the structure of the middle thin two sides thick, and one side of folding board and first support board and second support board are flush, the other side of folding board is equidistantly seted up folding guide groove, the utility model discloses the utility model discloses through reasonable material selection and structure design, give consideration to high temperature creep resistance and low temperature deformation adaptability. The synergistic effect of three-dimensional woven carbon fiber support board and silica gel folding board, shape memory polymer layer and flexible intermediate layer improves the overall temperature resistance and folding stability, significantly prolongs the service life of flexible screen equipment under complex working conditions.

Description

Technical Field

[0001] This utility model relates to the field of asphalt-based carbon board technology, specifically an asphalt-based carbon board with folding resistance. Background Technology

[0002] With the rapid development of flexible electronics technology, foldable screen phones, as a new type of smart terminal device, have received widespread attention and promotion in recent years. Carbon fiber is usually used as a reinforcing material, combined with matrix materials such as resin, metal, and ceramics to form composite materials.

[0003] Carbon fiber reinforced composite materials possess excellent properties such as low density, high modulus, high strength, high temperature resistance, high impact resistance, fatigue resistance, and flame retardancy. They have a natural advantage in addressing the common market concerns of foldable screen phones, such as the thickness after folding, the durability of the hinge, and creases, providing new material solutions for the future development of flexible electronic devices.

[0004] However, existing carbon fiber panels have the following problems in use: Traditional carbon fiber materials are prone to fatigue damage after repeated folding, resulting in irreversible creases on the screen surface, which seriously affects the display effect and the user's visual experience and operating feel. At the same time, the traditional structural design lacks an effective stress dispersion mechanism, which easily leads to stress concentration in the folding area, causing excessive deformation force in some areas, thus triggering the propagation of microcracks or even material fracture. This problem not only limits the number of folds and reduces the durability of the product, but also significantly shortens the overall lifespan of the device, restricting the widespread application of flexible display technology in high-frequency bending scenarios. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing an asphalt-based carbon plate with folding resistance, which significantly extends the service life of flexible screen equipment under complex working conditions.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A pitch-based carbon fiber plate with folding resistance includes a first support plate and a second support plate. A folding plate is provided between the first support plate and the second support plate. The folding plate has a structure that is thin in the middle and thick at both sides. One side of the folding plate is flush with the first support plate and the second support plate. Folding guide grooves are provided at equal intervals on the other side of the folding plate.

[0008] Preferably, a shape memory polymer layer is provided on the side of the folding plate opposite to the folding guide groove, and a flexible polymer intermediate layer is provided on the shape memory polymer layer.

[0009] Preferably, the first support plate and the second support plate are provided with an interface modification layer on the opposite side, and a surface treatment layer is provided on the interface modification layer.

[0010] Preferably, a slip coating is provided on the opposite side of both the surface treatment layer and the flexible polymer intermediate layer.

[0011] Preferably, the first support plate and the second support plate are made of three-dimensional woven carbon fiber material.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention achieves multiple performance optimizations through innovative structural design and material combination: the support plate using three-dimensional woven carbon fiber provides high strength and anti-delamination capability; the folding plate, which is thin in the middle and thick at the edges, combined with a shape memory polymer layer and a flexible intermediate layer, balances folding flexibility and fatigue resistance; the laser-cut folding guide groove improves folding accuracy and stability; and the composite design of the interface modification layer, surface treatment layer, and smooth coating endows the carbon plate with corrosion resistance, low friction, and easy maintenance characteristics. Its overall structure takes into account both high-temperature creep resistance and low-temperature deformation adaptability, significantly extending the service life of flexible screen equipment under complex working conditions. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of an asphalt-based carbon board with folding resistance proposed in this utility model;

[0015] Figure 2 This is a schematic diagram of the installation position of a folding plate with folding resistance proposed in this utility model;

[0016] Figure 3 This is a schematic diagram showing the installation position of an interface modification layer for an asphalt-based carbon board with fold-resistant function proposed in this utility model.

[0017] Figure 4 This is a schematic diagram showing the installation position of a slip-resistant coating for an asphalt-based carbon fiber plate with fold-resistant properties, as proposed in this utility model.

[0018] In the figure: 1. First support plate; 2. Second support plate; 3. Folded plate; 4. Interface modification layer; 5. Surface treatment layer; 6. Smooth coating; 7. Shape memory polymer layer; 8. Flexible polymer intermediate layer; 9. Folded guide groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Please see Figures 1 to 4 A pitch-based carbon board with folding resistance includes a first support plate 1 and a second support plate 2. The first support plate 1 and the second support plate 2 provide the basic support structure for the entire carbon board. High-strength materials should be selected to ensure stable support for the non-bending area of ​​the flexible screen and to ensure the neatness of the flexible non-bending area.

[0021] A folding plate 3 is provided between the first support plate 1 and the second support plate 2. The folding plate 3 has a structure that is thin in the middle and thick on both sides.

[0022] The folding plate 3 can be made of a material with high elasticity, high toughness and good ductility. During the folding process of the flexible screen, the folding plate 3 can deform with the bendable area of ​​the flexible screen, which can play a good soft support effect and improve the bending performance of the device.

[0023] By reducing the material thickness in the middle section of the folding plate 3, this part becomes easier to bend, thereby enhancing the folding resistance of the carbon plate without sacrificing the overall structural strength. When subjected to external forces, the thinner middle section can deform more easily, while the thicker sections on both sides provide the necessary support and stability, improving folding accuracy and stability, and reducing the risk of material fatigue damage.

[0024] Furthermore, the thicker design on both sides effectively disperses the stress generated during folding, preventing stress concentration in a single area from causing material breakage or fatigue damage. This structure minimizes the overall impact of folding on the material, extending the product's lifespan.

[0025] Furthermore, one side of the folding plate 3 can be flush with the first support plate 1 and the second support plate 2, and the other side of the folding plate 3 is provided with folding guide grooves 9 at equal intervals. The folding guide grooves 9 are precision cut by laser.

[0026] One side of the folding plate 3 can be kept flush with the first support plate 1 and the second support plate 2. This structure ensures that the entire carbon plate has a high degree of flatness and smoothness in the non-folded state. This not only helps to improve the aesthetics of the overall structure, but also ensures that there will be no additional friction or wear due to uneven surface during use.

[0027] The presence of the folding guide grooves 9 provides a clear folding path for the folding plate 3, ensuring that each fold proceeds along a preset direction. These grooves not only help users fold materials more easily in the intended manner but also limit the angle and position of the folds, preventing damage caused by excessive bending. The presence of the folding guide grooves 9 also increases the flexibility of the folding plate 3, enabling it to achieve the required folding action while maintaining sufficient strength, which is particularly important for applications requiring frequent folding.

[0028] A shape memory polymer layer 7 is provided on the side of the folding plate 3 away from the folding guide groove 9, and a flexible polymer intermediate layer 8 is provided on the shape memory polymer layer 7.

[0029] The shape memory polymer layer 7 (SMPs) can be a polyurethane-based shape memory polymer, which can recover to a preset shape at a specific temperature and has good recoverability and durability. At low temperatures, SMPs can become more flexible to adapt to folding action; while at normal operating temperatures, they can provide the necessary rigidity and support for the folding screen.

[0030] The flexible polymer interlayer 8 is usually made of materials with excellent flexibility, such as polyimide (PI) or silicone rubber. These materials can not only effectively absorb the stress generated during bending, but also maintain their shape after multiple folds and prevent crack propagation.

[0031] The flexible polymer interlayer 8 does not directly contact the folded plate 3, which can reduce heat conduction and avoid the thermal creep effect of the polyimide layer as much as possible, thereby improving the problem of creases appearing on the folded substrate due to the easy creep of polyimide material at high temperature.

[0032] An interface modification layer 4 is provided on the opposite side of the first support plate 1 and the second support plate 2, and a surface treatment layer 5 is provided on the interface modification layer 4.

[0033] The interface modification layer 4 can improve the interface bonding performance between the first support plate 1 and the second support plate 2 and other components, enhance their adhesion and compatibility, and improve the overall integrity of the carbon plate structure.

[0034] The surface treatment layer 5 can use Teflon coating, nano-ceramic coating, etc., which can give the carbon board some special surface properties, such as waterproof, wear-resistant, and corrosion-resistant, extending the service life of the carbon board and making it suitable for use in harsh environments, such as the support structure of outdoor equipment.

[0035] A slip coating 6 is provided on the opposite side of both the surface treatment layer 5 and the flexible polymer intermediate layer 8.

[0036] The smooth coating 6 can be made of polymer siloxane, which reduces the coefficient of friction on the carbon plate surface, making the carbon plate smoother when in contact with or sliding relative to other objects, reducing wear and resistance. It also prevents damage caused by excessive surface friction during folding and unfolding, and prevents dust and stains from adhering to the carbon plate surface, facilitating cleaning and maintenance.

[0037] The first support plate 1 and the second support plate 2 are made of three-dimensional woven carbon fiber material.

[0038] Three-dimensional woven carbon fiber materials have good anti-delamination ability and integrity, and can effectively resist delamination damage caused by thermal stress, thereby improving the reliability of carbon plate systems.

[0039] 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 bitumen-based carbon fiber plate with folding resistance, comprising a first support plate (1) and a second support plate (2), characterized in that, A folding plate (3) is provided between the first support plate (1) and the second support plate (2). The folding plate (3) has a structure that is thin in the middle and thick on both sides. One side of the folding plate (3) is flush with the first support plate (1) and the second support plate (2). Folding guide grooves (9) are provided at equal intervals on the other side of the folding plate (3).

2. The bitumen-based carbon board with folding resistance according to claim 1, characterized in that, A shape memory polymer layer (7) is provided on the side of the folding plate (3) away from the folding guide groove (9), and a flexible polymer intermediate layer (8) is provided on the shape memory polymer layer (7).

3. A pitch-based carbon board with folding resistance according to claim 1 or 2, characterized in that, The first support plate (1) and the second support plate (2) are provided with an interface modification layer (4) on the opposite side, and a surface treatment layer (5) is provided on the interface modification layer (4).

4. The bitumen-based carbon board with folding resistance according to claim 3, characterized in that, The surface treatment layer (5) and the flexible polymer intermediate layer (8) are both provided with a slip coating (6) on the opposite side.

5. A pitch-based carbon board with folding resistance according to claim 1, 2, or 4, characterized in that, The first support plate (1) and the second support plate (2) are made of three-dimensional woven carbon fiber material.

6. A pitch-based carbon board with folding resistance according to claim 3, characterized in that, The first support plate (1) and the second support plate (2) are made of three-dimensional woven carbon fiber material.

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