Composite board with anisotropy

Abstract

The utility model relates to the technical field of composite materials, in particular to a composite board with anisotropy, which is characterized by comprising a first thermoplastic elastomer layer, a rigid layer and a soft layer which are sequentially arranged from top to bottom, the first thermoplastic elastomer layer, the rigid layer and the soft layer are compounded and molded through hot pressing. The utility model has the advantage of anisotropic bending resistance.

Description

Technical Field

[0001] This utility model relates to the technical field of composite materials, and more specifically, to a composite plate with anisotropy. Background Technology

[0002] Composite panels are composite materials made of two or more different substances combined in different ways. They can take advantage of the advantages of various materials, overcome the defects of single materials, and expand the application range of materials.

[0003] Currently, most composite panels only possess a single type of bending resistance, making it difficult to achieve varying levels of bending resistance in different directions. For example, rigid composite panels exhibit high bending resistance in both directions, while flexible composite panels demonstrate low bending resistance in both. However, some industrial products in fields such as footwear, bags, and medical devices require a balance between rigidity and bending flexibility, which traditional single-rigidity or single-flexibility composite panels cannot adequately meet. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a composite plate with anisotropy, the advantage of which is that it has anisotropic bending resistance.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an anisotropic composite board, comprising a first thermoplastic elastomer layer, a rigid layer and a soft layer arranged sequentially from top to bottom, wherein the first thermoplastic elastomer layer is a thermoplastic polyurethane film, and the first thermoplastic elastomer layer, the rigid layer and the soft layer are formed by hot pressing composite molding.

[0006] In one embodiment, the rigid layer comprises a plurality of stacked fiber-reinforced thermosetting resin-based prepreg sheets.

[0007] In one embodiment, the fiber-reinforced thermosetting resin-based precured sheet is a glass fiber-reinforced epoxy resin precured sheet or a carbon fiber-reinforced epoxy resin precured sheet.

[0008] In one embodiment, the thickness of the rigid layer is 0.45 mm.

[0009] In one embodiment, a second thermoplastic elastomer layer is further provided between the rigid layer and the soft layer.

[0010] In one embodiment, the thickness of the second thermoplastic elastomer layer ranges from 0.05 to 0.25 mm.

[0011] In one embodiment, the soft layer includes a third thermoplastic elastomer layer, a first adhesive layer, a first glass fiber layer, a second adhesive layer, and a fourth thermoplastic elastomer layer arranged sequentially from bottom to top, wherein the third thermoplastic elastomer layer, the first adhesive layer, the first glass fiber layer, the second adhesive layer, and the fourth thermoplastic elastomer layer are formed by hot pressing.

[0012] In one embodiment, the first glass fiber layer is one or more of glass fiber plain weave, glass fiber satin weave, and glass fiber twill weave.

[0013] In one embodiment, the soft layer is a glass fiber reinforced thermoplastic elastomer composite material.

[0014] In one embodiment, the thickness of the soft layer ranges from 0.50 to 0.60 mm.

[0015] The anisotropic composite board described above has the following beneficial effects:

[0016] Firstly, by setting rigid and soft layers, the final product has anisotropic bending resistance, which effectively improves its applicability in fields such as footwear, bags, and medical devices.

[0017] Secondly, by making the outermost layer a thermoplastic polyurethane film, not only is the wear resistance and elasticity of the final product improved, but it also provides good support and shock absorption, thus expanding the application market of the final product.

[0018] Third, by setting a first glass fiber layer inside the soft layer, the final product has both anisotropic bending resistance and a certain degree of toughness and strength. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of Embodiment 1;

[0020] Figure 2 This is a structural schematic diagram of Embodiment 2;

[0021] In the figure: 101, first thermoplastic elastomer layer; 102, second thermoplastic elastomer layer; 2, rigid layer; 3, soft layer; 301, third thermoplastic elastomer layer; 302, first adhesive layer; 303, first glass fiber layer; 304, second adhesive layer; 305, fourth thermoplastic elastomer layer. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. Example 1

[0027] An anisotropic composite board, such as Figure 1 As shown, it includes a first thermoplastic elastomer layer 101, a rigid layer 2 and a soft layer 3 arranged sequentially from top to bottom. The first thermoplastic elastomer layer 101 is a thermoplastic polyurethane film. The first thermoplastic elastomer layer 101, the rigid layer 2 and the soft layer 3 are formed by hot pressing.

[0028] By setting a rigid layer 2 and a soft layer 3, the final product has anisotropic bending resistance, which effectively improves its applicability in footwear, sports equipment and medical devices. By setting the outermost layer as a thermoplastic polyurethane film, not only is the wear resistance and elasticity of the final product improved, but it also provides good support and shock absorption, thus expanding the application market of the final product.

[0029] Furthermore, such as Figure 1 As shown, the rigid layer 2 comprises multiple stacked fiber-reinforced thermosetting resin-based prepreg sheets. The fiber reinforcement enhances the tensile and compressive strength of the rigid layer 2, while the thermosetting resin improves the stability of the rigid layer 2 during hot pressing.

[0030] Furthermore, such as Figure 1 As shown, the fiber-reinforced thermosetting resin-based precured sheet is a glass fiber-reinforced epoxy resin precured sheet or a carbon fiber-reinforced epoxy resin precured sheet, such as a high-rigidity epoxy glass fiber board or an epoxy carbon fiber board.

[0031] Specifically, such as Figure 1 As shown, the thickness of rigid layer 2 is 0.45 mm.

[0032] If the thickness of rigid layer 2 is too large, the bending resistance of the final product in all directions will be too strong; if the thickness of rigid layer 2 is too small, the bending resistance of the final product in all directions will be too weak.

[0033] Specifically, such as Figure 1 As shown, a second thermoplastic elastomer layer 102 is provided between the rigid layer 2 and the soft layer 3. The second thermoplastic elastomer layer 102 is composed of multiple layers of thermoplastic polyurethane film.

[0034] Furthermore, such as Figure 1 As shown, the thickness of the second thermoplastic elastomer layer 102 ranges from 0.05 to 0.25 mm.

[0035] Specifically, such as Figure 1 As shown, the soft layer 3 includes a third thermoplastic elastomer layer 301, a first adhesive layer 302, a first glass fiber layer 303, a second adhesive layer 304, and a fourth thermoplastic elastomer layer 305 arranged sequentially from bottom to top. The third thermoplastic elastomer layer 301, the first adhesive layer 302, the first glass fiber layer 303, the second adhesive layer 304, and the fourth thermoplastic elastomer layer 305 are formed by hot pressing.

[0036] The first glass fiber layer 303 is bonded to the first adhesive layer 302 and the second adhesive layer 304 on its upper and lower sides, respectively. Then, the third thermoplastic elastomer layer 301 and the fourth thermoplastic elastomer layer 305 are placed on the outermost sides, forming a soft layer 3. This soft layer 3, along with the rigid layer 2, the first thermoplastic elastomer layer 101, and the second thermoplastic elastomer layer 102, is then hot-pressed. The first adhesive layer 302 and the second adhesive layer 304 are both made of water-based polyurethane film, the first glass fiber layer 303 is made of glass fiber cloth, and the third thermoplastic elastomer layer 301 and the fourth thermoplastic elastomer layer 305 are both made of thermoplastic polyurethane film.

[0037] A superimposed layer can also be provided on the third thermoplastic elastomer layer 301. The superimposed layer includes a fourth adhesive layer, a second glass fiber layer, a third adhesive layer, and a fifth thermoplastic elastomer layer arranged sequentially from bottom to top. The superimposed layer can be superimposed multiple times according to actual needs, preferably 2 to 3 times. The material and thickness of the fourth adhesive layer are the same as those of the first adhesive layer 302 and the second adhesive layer 304. The material and thickness of the second glass fiber layer are the same as those of the first glass fiber layer 303. The material and thickness of the fifth thermoplastic elastomer layer are the same as those of the third thermoplastic elastomer layer 301 and the fourth thermoplastic elastomer layer 305.

[0038] By setting a first glass fiber layer 303 in the soft layer 3, the final product has both anisotropic bending resistance and a certain degree of toughness and strength.

[0039] Specifically, such as Figure 1 As shown, the thickness of the soft layer 3 ranges from 0.50 to 0.60 mm. If the thickness of the soft layer 3 is too small, the bending resistance in all directions of the final product will be weak; if the thickness of the soft layer 3 is too large, the bending resistance in all directions of the final product will be strong.

[0040] Specifically, such as Figure 1 As shown, the fiberglass layer is one or more of plain fiberglass fabric, satin fiberglass fabric, and twill fiberglass fabric. Plain fiberglass fabric, satin fiberglass fabric, and twill fiberglass fabric are commonly used in the automotive, electronics, and construction industries, and are used as reinforcing materials in this embodiment.

[0041] The method for preparing the composite plate in this embodiment is as follows:

[0042] Select a fiberglass cloth with a suitable basis weight, impregnate or spray it with a 5% aqueous polyurethane solution, and bake the impregnated or sprayed fiberglass cloth at 100°C for 5-30 minutes to remove moisture. Place a thermoplastic polyurethane film of suitable thickness on the top and bottom of the baked fiberglass cloth, and place it at the bottom. Then, stack the first thermoplastic elastomer layer 101 and the rigid layer 2 on top of it from top to bottom. Composite shaping is achieved by hot pressing. The hot pressing temperature range is 110-170°C, preferably 130-150°C, and the hot pressing pressure range is 5-30 kg / cm². 2 The preferred value is 10-20 kg / cm². 2 The hot pressing time ranges from 20 to 150 minutes, preferably from 45 to 90 minutes.

[0043] If the hot pressing pressure is too low or the time is too short, the bonding force between the soft layer 3 and the rigid layer 2 will be insufficient. Example 2

[0044] The difference from Example 1 is that, as Figure 2 As shown, the soft layer 3 is a glass fiber reinforced thermoplastic elastomer composite material made of glass fiber and thermoplastic elastomer.

[0045] In this embodiment, the glass fiber reinforced thermoplastic elastomer composite material can be repeatedly stacked in multiple layers. The soft layer 3 is not limited to a single layer of glass fiber reinforced thermoplastic elastomer composite material. The stacking time is preferably 2 to 3 times, and the material and thickness of each layer are the same.

[0046] The preparation method in this embodiment is as follows:

[0047] The first thermoplastic elastomer layer 101, the rigid layer 2, and the soft layer 3 are stacked from top to bottom and composite-shaped by hot pressing. The hot pressing temperature range is 110-170℃, preferably 130-150℃, and the hot pressing pressure range is 5-30 kg / cm². 2 The preferred value is 10-20 kg / cm². 2 The hot pressing time ranges from 20 to 150 minutes, preferably from 45 to 90 minutes.

[0048] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A composite plate with anisotropy, characterized in that, include: The first thermoplastic elastomer layer, the rigid layer, and the soft layer are arranged sequentially from top to bottom. The first thermoplastic elastomer layer is a thermoplastic polyurethane film. The first thermoplastic elastomer layer, the rigid layer, and the soft layer are formed by hot pressing. The rigid layer comprises a plurality of stacked fiber-reinforced thermosetting resin-based prepreg sheets. The soft layer is a glass fiber reinforced thermoplastic elastomer composite material; the soft layer includes a third thermoplastic elastomer layer, a first adhesive layer, a first glass fiber layer, a second adhesive layer and a fourth thermoplastic elastomer layer arranged sequentially from bottom to top, and the third thermoplastic elastomer layer, the first adhesive layer, the first glass fiber layer, the second adhesive layer and the fourth thermoplastic elastomer layer are formed by hot pressing composite molding; The first thermoplastic elastomer layer, the third thermoplastic elastomer layer, and the fourth thermoplastic elastomer layer are all thermoplastic polyurethane films; Both the first adhesive layer and the second adhesive layer are made of water-based polyurethane film; The first glass fiber layer is one or more of glass fiber plain weave fabric, glass fiber satin weave fabric, and glass fiber twill weave fabric.

2. The anisotropic composite plate according to claim 1, characterized in that: The fiber-reinforced thermosetting resin-based semi-cured sheet is a glass fiber-reinforced epoxy resin semi-cured sheet or a carbon fiber-reinforced epoxy resin semi-cured sheet.

3. The anisotropic composite plate according to claim 1, characterized in that: The thickness of the rigid layer is 0.45 mm.

4. The anisotropic composite plate according to claim 1, characterized in that: A second thermoplastic elastomer layer is further provided between the rigid layer and the soft layer.

5. The anisotropic composite plate according to claim 4, characterized in that: The thickness of the second thermoplastic elastomer layer ranges from 0.05 to 0.25 mm.

6. The anisotropic composite plate according to claim 1, characterized in that: The thickness of the soft layer ranges from 0.50 to 0.60 mm.

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