High-impact-resistance light-weight high-strength composite board

Abstract

The utility model relates to the technical field of composite materials, in particular to a high-impact-resistance light-weight high-strength composite board which comprises a first glass fiber reinforced polyurethane layer, a low-density core layer and a second glass fiber reinforced polyurethane layer which are sequentially arranged from bottom to top. And the first glass fiber reinforced polyurethane layer, the low-density core layer and the second glass fiber reinforced polyurethane layer are compounded and molded through hot pressing. According to the utility model, the light high-strength low-density core layer and the high-toughness glass fiber reinforced polyurethane layer are compounded, so that the overall toughness and impact resistance of the material are effectively improved, the material can bear larger impact force and is not easy to break, and the composite material is particularly suitable for the application fields requiring high impact resistance, such as automobiles, household appliances and 3C electronic products.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of composite material more particularly, it relates to a kind of high impact light high-strength composite board. BACKGROUND

[0002] With the wide application of lightweight materials in various industrial fields, there is an increasing demand for materials that are both lightweight and have high strength. Hollow glass microsphere-filled epoxy glass fiber composite materials have attracted attention due to their low density and excellent static mechanical properties. For example, the ultra-low density epoxy glass fiber composite material prepared in patent CN201410127336 has a density of 0.7 g / cm³, while maintaining a bending strength of about 254 MPa, making it an ideal lightweight high-strength material.

[0003] However, due to the brittleness of both epoxy resin and hollow glass microspheres, this material does not perform ideally in terms of toughness and impact resistance. Especially in application scenarios that require withstanding large impact forces, such as automotive manufacturing, household appliances, and 3C electronic products, the brittleness of this material limits its more widespread application. SUMMARY

[0004] To address the deficiencies in the prior art, the purpose of the present utility model is to provide a high impact light high-strength composite board that has the advantages of lightweight, high strength, and high impact resistance.

[0005] The above technical purpose of the utility model is achieved through the following technical solution: a high impact light high-strength composite board, comprising: a first glass fiber reinforced polyurethane layer, a low-density core layer, and a second glass fiber reinforced polyurethane layer arranged in order from bottom to top, wherein the first glass fiber reinforced polyurethane layer, the low-density core layer, and the second glass fiber reinforced polyurethane layer are formed by hot pressing.

[0006] In one embodiment, the low-density core layer includes an epoxy glass fiber layer.

[0007] In one embodiment, the epoxy glass fiber layer includes a plurality of epoxy glass fiber prepregs stacked in order.

[0008] In one embodiment, the epoxy glass fiber prepreg has hollow glass microspheres embedded therein.

[0009] In one embodiment, the low-density core layer further includes a third glass fiber reinforced polyurethane layer, and the epoxy glass fiber layer is provided in multiple, with the third glass fiber reinforced polyurethane layer arranged between two adjacent epoxy glass fiber layers.

[0010] In one embodiment, the first glass fiber reinforced polyurethane layer and the second glass fiber reinforced polyurethane layer have the same thickness.

[0011] In one of the embodiments, the thickness ratio of the low-density core layer to the first glass fiber reinforced polyurethane layer is (2-10):1.

[0012] In one of the embodiments, the thickness of the low-density core layer is 1.0-10.0 mm, and the thickness of the first glass fiber reinforced polyurethane layer, the second glass fiber reinforced polyurethane layer and the third glass fiber reinforced polyurethane layer is 0.5-2.5 mm.

[0013] In one of the embodiments, the total thickness of the high-impact lightweight high-strength composite board is 2.0-15.0 mm.

[0014] In one of the embodiments, the first glass fiber reinforced polyurethane layer, the second glass fiber reinforced polyurethane layer and the third glass fiber reinforced polyurethane layer all include a polyamide-polyether block copolymer layer.

[0015] The above high-impact lightweight high-strength composite board has the following beneficial effects:

[0016] Firstly, by combining the lightweight high-strength low-density core layer with the high-toughness glass fiber reinforced polyurethane layer, the overall toughness and impact resistance of the material are effectively improved, so that it can withstand greater impact force without breaking, and is particularly suitable for application fields such as automobiles, household appliances and 3C electronic products which require high impact resistance.

[0017] Secondly, the utility model adopts the sandwich structure composed of the first glass fiber reinforced polyurethane layer, the low-density core layer and the second glass fiber reinforced polyurethane layer, and further optimizes the overall structure by additionally arranging the third glass fiber reinforced polyurethane layer in the low-density core layer. This design allows the total thickness of the composite board to be flexibly controlled by adjusting the thickness and number of each layer, so as to meet the specific requirements of different fields for the impact resistance of the material. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of example one;

[0019] Figure 2 is a structural schematic diagram of example two.

[0020] In the figure: 1, first glass fiber reinforced polyurethane layer; 2, epoxy glass fiber layer; 201, epoxy glass fiber prepreg; 3, second glass fiber reinforced polyurethane layer; 4, third glass fiber reinforced polyurethane layer. DETAILED DESCRIPTION

[0021] The utility model will be described in detail below in combination with the drawings and examples.

[0022] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0023] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, unless otherwise specifically limited.

[0024] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0025] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature. Embodiment one

[0026] A kind of high impact resistance light high-strength composite board, as shown in Figure 1 Figure, it includes first glass fiber reinforced polyurethane layer 1, low-density core layer and second glass fiber reinforced polyurethane layer 3 arranged in turn from bottom to top, first glass fiber reinforced polyurethane layer 1, low-density core layer and second glass fiber reinforced polyurethane layer 3 are formed by hot pressing composite.

[0027] The low-density core layer is used for bonding the two glass fiber reinforced polyurethane layers, reduces the overall density and provides strength and rigidity, and ensures the structural stability and load bearing capacity of the composite board during use; the first glass fiber reinforced polyurethane layer 1 and the second glass fiber reinforced polyurethane layer 3 are arranged on the two sides of the low-density core layer, and the sandwich structure further improves the toughness of the composite board, so that the composite board is not easy to break when impacted, and the formation and expansion of cracks are reduced.

[0028] The low-density core layer is used for bonding the two glass fiber reinforced polyurethane layers, reduces the overall density and provides strength and rigidity, and ensures the structural stability and load bearing capacity of the composite board during use; the first glass fiber reinforced polyurethane layer 1 and the second glass fiber reinforced polyurethane layer 3 are arranged on the two sides of the low-density core layer, and the sandwich structure further improves the toughness of the composite board, so that the composite board is not easy to break when impacted, and the formation and expansion of cracks are reduced.

[0029] Specifically, the low-density core layer comprises an epoxy glass fiber layer 2, and the epoxy glass fiber layer 2 comprises a plurality of epoxy glass fiber prepregs 201 stacked in sequence. In this embodiment, the epoxy glass fiber prepregs 201 are arranged as four.

[0030] Further, the epoxy glass fiber prepregs 201 are embedded with hollow glass microspheres. This structure design can further reduce the density of the composite material while maintaining the lightweight and high-strength characteristics of the composite board.

[0031] Specifically, the low-density core layer further comprises a third glass fiber reinforced polyurethane layer 4, the epoxy glass fiber layer 2 is provided in plurality, and the third glass fiber reinforced polyurethane layer 4 is arranged between two adjacent epoxy glass fiber layers 2. In this embodiment, the epoxy glass fiber layer 2 is arranged as two.

[0032] The utility model adopts the sandwich structure of the first glass fiber reinforced polyurethane layer 1, the low-density core layer and the second glass fiber reinforced polyurethane layer 3, and further optimizes the overall structure by additionally arranging the third glass fiber reinforced polyurethane layer 4 in the low-density core layer. This design allows the total thickness of the composite board to be flexibly controlled by adjusting the thickness and number of each layer, so as to meet the specific requirements of different fields for the impact resistance of the material.

[0033] Further, the thickness of the first glass fiber reinforced polyurethane layer 1 and the second glass fiber reinforced polyurethane layer 3 is the same. This arrangement can ensure the symmetry of the composite board in structure, thereby improving the overall impact resistance.

[0034] Specifically, the thickness ratio of the low-density core layer to the first glass fiber reinforced polyurethane layer 1 is (2-10):1. By adjusting the thickness ratio of the low-density core layer to the first glass fiber reinforced polyurethane layer 1, the impact resistance of the composite board can be significantly improved while maintaining the overall lightweight of the composite board.

[0035] Specifically, the thickness of the low-density core layer is 1.0-10.0mm. In the embodiment, the low-density core layer comprises two epoxy glass fiber layers 2 and one third glass fiber reinforced polyurethane layer 4, the thickness of the epoxy glass fiber layer 2 is 0.8mm, and the thickness of the low-density core layer is 2.1mm.

[0036] Specifically, the thickness of the first glass fiber reinforced polyurethane layer 1, the second glass fiber reinforced polyurethane layer 3 and the third glass fiber reinforced polyurethane layer 4 is 0.5-2.5mm. In the embodiment, the thickness of the first glass fiber reinforced polyurethane layer 1, the second glass fiber reinforced polyurethane layer 3 and the third glass fiber reinforced polyurethane layer 4 is 0.55mm.

[0037] Specifically, the total thickness of the high-impact lightweight high-strength composite board is 2.0-15.0mm. In the embodiment, the total thickness of the high-impact lightweight high-strength composite board is 3.2mm. According to the structure shown in Figure 1 , the first glass fiber reinforced polyurethane layer 1, the second glass fiber reinforced polyurethane layer 3 and the third glass fiber reinforced polyurethane layer 4 and the epoxy glass fiber layer 2 are stacked and hot-pressed to obtain the high-impact lightweight high-strength composite board. The layers of the high-impact lightweight high-strength composite board are closely attached without delamination, which can greatly improve the impact resistance of the composite board.

[0038] Specifically, the first glass fiber reinforced polyurethane layer 1, the second glass fiber reinforced polyurethane layer 3 and the third glass fiber reinforced polyurethane layer 4 each comprise a polyamide-polyether block copolymer layer. The polyamide-polyether block copolymer layer has good flexibility and impact absorption capacity, which can significantly improve the impact resistance of the composite board. Embodiment two

[0039] The difference between the embodiment and the embodiment one is that, as shown in Figure 2 , in the embodiment, the low-density core layer comprises one epoxy glass fiber layer 2, and the epoxy glass fiber layer 2 comprises eight epoxy glass fiber prepregs 201 stacked. The low-density core layer does not contain the third glass fiber reinforced polyurethane layer 4.

[0040] Further, the thickness of the first glass fiber reinforced polyurethane layer 1 and the second glass fiber reinforced polyurethane layer 3 in the embodiment is 0.55mm, the thickness of the low-density core layer is 1.6mm, and the total thickness of the high-impact lightweight high-strength composite board is 2.7mm.

[0041] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A high-impact, lightweight, high-strength composite board, characterized in that, include: The first glass fiber reinforced polyurethane layer, the low-density core layer and the second glass fiber reinforced polyurethane layer are arranged sequentially from bottom to top. The first glass fiber reinforced polyurethane layer, the low-density core layer and the second glass fiber reinforced polyurethane layer are formed by hot pressing. The low-density core layer includes an epoxy fiberglass layer; The epoxy fiberglass layer comprises multiple epoxy fiberglass prepreg sheets stacked sequentially. Hollow glass microspheres are embedded in the epoxy fiberglass semi-cured sheet; The low-density core layer also includes a third glass fiber reinforced polyurethane layer, and multiple epoxy glass fiber layers are provided, with the third glass fiber reinforced polyurethane layer disposed between two adjacent epoxy glass fiber layers; The first glass fiber reinforced polyurethane layer, the second glass fiber reinforced polyurethane layer, and the third glass fiber reinforced polyurethane layer all include a polyamide-polyether block copolymer layer.

2. The high-impact, lightweight, high-strength composite board according to claim 1, characterized in that: The first glass fiber reinforced polyurethane layer and the second glass fiber reinforced polyurethane layer have the same thickness.

3. The high-impact, lightweight, high-strength composite board according to claim 1, characterized in that: The thickness ratio of the low-density core layer to the first glass fiber reinforced polyurethane layer is (2-10):

1.

4. The high-impact, lightweight, high-strength composite board according to claim 1, characterized in that: The thickness of the low-density core layer is 1.0-10.0 mm, and the thicknesses of the first glass fiber reinforced polyurethane layer, the second glass fiber reinforced polyurethane layer, and the third glass fiber reinforced polyurethane layer are all 0.5-2.5 mm.

5. The high-impact, lightweight, high-strength composite board according to claim 1, characterized in that: The total thickness of the high-impact, lightweight, high-strength composite board is 2.0-15.0 mm.

Images