Resin-based composite board

Abstract

The utility model relates to a resin-based composite board, the resin-based composite board comprises an upper surface layer, a core layer and a lower surface layer, the upper surface layer, the core layer and the lower surface layer are sequentially stacked, the upper surface layer and the lower surface layer are independently selected from fiber cloth reinforced resin composite layers, the core layer comprises 2N layers of unidirectional fiber reinforced resin composite layers which are stacked, n is an integer greater than or equal to 1, and the included angle between the standard directions of two adjacent unidirectional fiber reinforced resin composite layers is 30-90 degrees by taking the axial direction of unidirectional fibers in the unidirectional fiber reinforced resin composite layers as a standard direction and by an acute angle. The fiber cloth reinforced resin composite layers and the unidirectional fiber reinforced resin composite layers are adopted to construct a sandwich structure, and meanwhile, the number and the angle of the unidirectional fiber reinforced resin composite layers in the core layer are set, so that the resin-based composite board has excellent tensile modulus and strength in all directions, and the tensile strength of the resin-based composite board is improved. And the method can be suitable for more application scenes.

Description

Technical Field

[0001] The present application relates to the technical field of resin substrates, and in particular to a resin-based composite board. Background Art

[0002] At present, resin substrates are mainly fiber woven cloth reinforced resin composite panels, but their tensile modulus generally cannot meet the requirements of some high modulus application scenarios.

[0003] Although unidirectional fiber-reinforced resin composite panels are widely used due to their high strength and high modulus, they only have excellent mechanical properties in the axial direction of the unidirectional fibers, and have poor mechanical properties in the direction perpendicular to the axis. Excellent mechanical properties in all directions cannot be guaranteed, so their application scenarios are also limited. Utility Model Content

[0004] Based on this, it is necessary to provide a resin-based composite panel having excellent tensile modulus and strength in all directions.

[0005] A resin-based composite panel comprises an upper surface layer, a core layer, and a lower surface layer stacked in sequence, wherein the upper surface layer and the lower surface layer are independently selected from fiber cloth reinforced resin composite layers, the core layer comprises 2N stacked unidirectional fiber reinforced resin composite layers, N is an integer greater than or equal to 1, the axial direction of the unidirectional fibers in the unidirectional fiber reinforced resin composite layer is taken as the standard direction, and the angle between the standard directions of two adjacent layers of the unidirectional fiber reinforced resin composite layer is 30°-90°, measured as an acute angle.

[0006] In one embodiment, the included angle between the standard directions of two adjacent unidirectional fiber reinforced resin composite layers is 90°.

[0007] In one embodiment, two adjacent layers of the unidirectional fiber-reinforced resin composite layer constitute a cross layer, and the core layer includes at least two groups of cross layers. When the number of cross layers in the core layer is an even number, the cross layers in the core layer are centrally symmetrically distributed. When the number of cross layers in the core layer is an odd number, the cross layers in the core layer are centrally symmetrically distributed with the centermost cross layer as the symmetry axis.

[0008] In one embodiment, the core layer further includes at least one interlayer, the interlayer is selected from a fiber cloth reinforced resin composite layer, and the interlayer is selectively sandwiched between the two groups of cross layers.

[0009] In one embodiment, the interlayer is centrally symmetrically distributed in the core layer.

[0010] In one embodiment, the number of fiber cloth reinforced resin composite layers in the interlayer is independently selected from one layer or more than two layers, and when the interlayer is centrally symmetrically distributed in the core layer, the number of fiber cloth reinforced resin composite layers in the interlayer that is centrally symmetrically distributed is equal.

[0011] In one embodiment, in the resin-based composite plate, the ratio of the total thickness of the fiber cloth reinforced resin composite layer to the total thickness of the unidirectional fiber reinforced resin composite layer is 2:13-1:1.

[0012] In one embodiment, the number of fiber cloth reinforced resin composite layers in the upper surface layer and the lower surface layer is independently selected from one layer or more than two layers.

[0013] In one embodiment, the thickness of the upper surface layer and the lower surface layer are equal.

[0014] In one embodiment, the unidirectional fiber reinforced resin composite layer is selected from a unidirectional aramid fiber reinforced resin composite layer, a unidirectional nylon fiber reinforced resin composite layer, a unidirectional glass fiber reinforced resin composite layer, a unidirectional polyester fiber reinforced resin composite layer or a unidirectional carbon fiber reinforced resin composite layer;

[0015] And / or, the fiber cloth reinforced resin composite layer is selected from glass fiber cloth reinforced resin composite layer, basalt fiber cloth reinforced resin composite layer, quartz fiber cloth reinforced resin composite layer, aramid fiber cloth reinforced resin composite layer or polyimide fiber cloth reinforced resin composite layer.

[0016] Compared with the existing technology, the resin-based composite plate provided in the present application constructs a sandwich structure by adopting a fiber cloth reinforced resin composite layer and a unidirectional fiber reinforced resin composite layer. At the same time, by setting the number of layers and angles of the unidirectional fiber reinforced resin composite layer in the core layer, the resin-based composite plate has excellent tensile modulus and strength in all directions, and can be suitable for more application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a schematic structural diagram of a resin-based composite panel according to one embodiment of the present application;

[0019] Figure 2 This is a schematic structural diagram of a resin-based composite panel according to another embodiment of the present application.

[0020] Reference numerals: 10, upper surface layer; 20, core layer; 30, lower surface layer; 201, unidirectional fiber reinforced resin composite layer; 202, cross layer; 203, interlayer. DETAILED DESCRIPTION

[0021] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0022] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0023] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0024] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0026] like Figure 1 As shown, a resin-based composite board according to an embodiment of the present application includes an upper surface layer 10, a core layer 20 and a lower surface layer 30 stacked in sequence.

[0027] Among them, the upper surface layer 10 and the lower surface layer 30 are independently selected from fiber cloth reinforced resin composite layers, and the core layer 20 includes 2N layers of unidirectional fiber reinforced resin composite layers 201 stacked together, where N is an integer greater than or equal to 1, such as N is 1, 2, 3, 4, 5, etc., and can be adjusted as needed so that the number of layers of unidirectional fiber reinforced resin composite layers 201 in the core layer 20 is an even number of layers, and the axial direction of the unidirectional fibers in the unidirectional fiber reinforced resin composite layer 201 is the standard direction, and in terms of acute angles, the angle between the standard directions of two adjacent layers of the unidirectional fiber reinforced resin composite layer 201 is 30°-90°.

[0028] Thus, by adopting fiber cloth reinforced resin composite layer as the upper surface layer 10 and the lower surface layer 30, and the core layer 20 composed of stacked unidirectional fiber reinforced resin composite layer 201 to construct a sandwich structure, at the same time, by selecting the number of layers of unidirectional fiber reinforced resin composite layer 201 in the core layer 20 and setting the angle of two adjacent layers of unidirectional fiber reinforced resin composite layer 201, the defect of insufficient mechanical properties of single-layer unidirectional fiber reinforced resin composite layer 201 in the vertical axial direction can be compensated, so that the resin-based composite plate has excellent tensile modulus and strength in all directions, and can be suitable for more application scenarios.

[0029] In order to further compensate for the defect of insufficient mechanical properties of the single-layer unidirectional fiber-reinforced resin composite layer 201 in the direction perpendicular to the axis by angle setting, in the core layer 20, the angle between the standard directions of the two adjacent layers of the unidirectional fiber-reinforced resin composite layer 201 is preferably 40°-90°, 50°-90°, 60°-90°, 70°-90°, 80°-90°, etc., more preferably 90°, so that the resin-based composite plate has better tensile modulus and strength in all directions.

[0030] In the core layer 20, the number of layers of the unidirectional fiber reinforced resin composite layer 201 is an even number. When N is an integer greater than or equal to 2, please continue to refer to Figure 1The two adjacent layers of the unidirectional fiber reinforced resin composite layer 201 can constitute a cross layer 202, and the core layer 20 includes at least two groups of cross layers 202, including but not limited to two groups of cross layers 202, three groups of cross layers 202, four groups of cross layers 202, five groups of cross layers 202, etc., which can be adjusted as needed.

[0031] Furthermore, when the number of cross layers 202 in the core layer 20 is an even number, such as two groups, four groups, six groups, etc., the cross layers 202 in the core layer 20 are centrally symmetrically distributed. For example, when the number of cross layers 202 in the core layer 20 is four groups, in the direction from the upper surface layer 10 to the lower surface layer 30, the eight layers of unidirectional fiber reinforced resin composite layers 201 in the core layer 20 can be divided into two layers as a cross layer 202, and defined as the first group of cross layers, the second group of cross layers, the third group of cross layers and the fourth group of cross layers. At this time, the first group of cross layers and the fourth group of cross layers are centrally symmetrically distributed, and the second group of cross layers and the third group of cross layers are centrally symmetrically distributed.

[0032] When the number of cross layers 202 in the core layer 20 is an odd number, such as three groups, five groups, seven groups, etc., the cross layers 202 in the core layer 20 are centrally symmetrically distributed with the centermost cross layer 202 as the symmetry axis. For example, when the number of cross layers 202 in the core layer 20 is five groups, in the direction from the upper surface layer 10 to the lower surface layer 30, the 10 layers of unidirectional fiber reinforced resin composite layers 201 in the core layer 20 can be divided into two layers as a cross layer 202, and defined as the first group of cross layers, the second group of cross layers, the third group of cross layers, the fourth group of cross layers and the fifth group of cross layers. At this time, the first group of cross layers and the fifth group of cross layers are centrally symmetrically distributed, the second group of cross layers and the fourth group of cross layers are centrally symmetrically distributed, and the third group of cross layers can be regarded as the symmetry axis. There is no requirement for the distribution form of the third group of cross layers.

[0033] Thus, by arranging the centrally symmetrical distribution of the cross layer 202 in the core layer 20, the resin-based composite plate can have a better tensile modulus and strength in all directions, especially when the angle between the standard directions of the two unidirectional fiber-reinforced resin composite layers 201 in the cross layer 202 is 90°, the effect is better.

[0034] like Figure 2 As shown, it is a resin-based composite board of another embodiment provided by the present application. In this embodiment, the core layer 20 also includes at least one interlayer 203, and the interlayer is selected from a fiber cloth reinforced resin composite layer. The interlayer 203 is selectively sandwiched between the two groups of the cross layers 202, so that by adding the interlayer 203, the tensile modulus and strength of the resin-based composite board in all directions can be further improved.

[0035] For example, when the number of cross layers 202 in the core layer 20 is five groups, in the direction from the upper surface layer 10 to the lower surface layer 30, the 10 layers of unidirectional fiber reinforced resin composite layers 201 in the core layer 20 can be divided into two layers as a cross layer 202, which are defined as the first group of cross layers, the second group of cross layers, the third group of cross layers, the fourth group of cross layers and the fifth group of cross layers respectively. At this time, the interlayer 203 can be sandwiched between the first group of cross layers and the second group of cross layers, or between the second group of cross layers and the third group of cross layers, or between the third group of cross layers and the fourth group of cross layers, or between the fourth group of cross layers and the fifth group of cross layers. Of course, an interlayer 203 can be sandwiched between the first group of cross layers and the second group of cross layers and between the second group of cross layers and the third group of cross layers respectively, or an interlayer 203 can be sandwiched between two adjacent groups of cross layers 202. The specific details can be adjusted as needed.

[0036] Furthermore, the interlayer 203 is centrally symmetrically distributed in the core layer 20, for example, Figure 2 In the direction from the upper surface layer 10 to the lower surface layer 30, the eight layers of unidirectional fiber reinforced resin composite layers 201 in the core layer 20 can be divided into two layers as a cross layer 202, which are defined as the first group of cross layers, the second group of cross layers, the third group of cross layers and the fourth group of cross layers respectively. At this time, an interlayer 203 is sandwiched between the first group of cross layers and the second group of cross layers, and an interlayer 203 is sandwiched between the third group of cross layers and the fourth group of cross layers, so that the interlayers 203 are centrally symmetrically distributed in the core layer 20. Such an arrangement can make the resin-based composite plate have better tensile modulus and strength in all directions, especially when the angle between the standard directions of the two layers of unidirectional fiber reinforced resin composite layers 201 in the cross layer 202 is 90°, the effect is better.

[0037] The number of the fiber cloth reinforced resin composite layers in the interlayer 203 is independently selected from one layer or two or more layers. When the number is two or more layers, the fiber cloth reinforced resin composite layers are stacked to form the interlayer 203 .

[0038] Furthermore, when the interlayers 203 are centrally symmetrically distributed in the core layer 20, the number of layers of the fiber cloth reinforced resin composite layer in the centrally symmetrically distributed interlayers 203 is equal. For example, in the direction from the upper surface layer 10 to the lower surface layer 30, the unidirectional fiber reinforced resin composite layer 201 in the core layer 20 can be divided into two layers as a cross layer 202, which are respectively defined as the first group of cross layers, the second group of cross layers, the third group of cross layers, the fourth group of cross layers and the fifth group of cross layers, and an interlayer 203 is sandwiched between each of the two adjacent groups of cross layers, and the interlayer 203 between the first group of cross layers and the second group of cross layers is defined as the first interlayer, the interlayer 203 between the second group of cross layers and the third group of cross layers is defined as the second interlayer, and the third group of cross layers is defined as the The interlayer 203 between the first interlayer and the fourth group of cross layers is defined as the third interlayer, and the interlayer 203 between the fourth group of cross layers and the fifth group of cross layers is defined as the fourth interlayer. At this time, the first interlayer and the fourth interlayer are centrally symmetrically distributed, the second interlayer and the third interlayer are centrally symmetrically distributed, the number of layers of the fiber cloth reinforced resin composite layer in the first interlayer and the fourth interlayer is equal, the number of layers of the fiber cloth reinforced resin composite layer in the second interlayer and the third interlayer is equal, the number of layers of the fiber cloth reinforced resin composite layer in the first interlayer and the second interlayer can be equal or unequal, and are preferably equal.

[0039] In the resin-based composite panel of the present application, the ratio of the total thickness of the fiber cloth reinforced resin composite layer to the total thickness of the unidirectional fiber reinforced resin composite layer is 2:13-1:1, wherein the total thickness of the fiber cloth reinforced resin composite layer includes the thickness of the upper surface layer 10, the lower surface layer 30 and the fiber cloth reinforced resin composite layer in the interlayer 203. Such an arrangement can further improve the tensile modulus and strength of the resin-based composite panel in all directions.

[0040] The number of fiber cloth reinforced resin composite layers in the upper surface layer 10 and the lower surface layer 30 is independently selected from one layer or two or more layers. When the number is two or more layers, the fiber cloth reinforced resin composite layers are stacked to form the upper surface layer 10 and the lower surface layer 30.

[0041] Furthermore, the number of fiber cloth reinforced resin composite layers in the upper surface layer 10 and the lower surface layer 30 may be equal or unequal, and the thickness of the upper surface layer 10 and the lower surface layer 30 may be equal or unequal. Preferably, the thickness of the upper surface layer 10 and the lower surface layer 30 are equal, which can further improve the tensile modulus of the resin-based composite panel.

[0042] In the present application, the tensile modulus of the unidirectional fibers in the unidirectional fiber-reinforced resin composite layer 201 is preferably greater than or equal to 50 GPa, thereby effectively improving the tensile modulus of the resin-based composite plate in all directions. Preferably, the unidirectional fiber-reinforced resin composite layer 201 is selected from a unidirectional aramid fiber-reinforced resin composite layer, a unidirectional nylon fiber-reinforced resin composite layer, a unidirectional glass fiber-reinforced resin composite layer, a unidirectional polyester fiber-reinforced resin composite layer or a unidirectional carbon fiber-reinforced resin composite layer. Since the tensile modulus of the unidirectional carbon fiber is above 100 GPa, the unidirectional fiber-reinforced resin composite layer 201 is further preferably a unidirectional carbon fiber-reinforced resin composite layer.

[0043] In the present application, the fiber cloth reinforced resin composite layer used in the upper surface layer 10, the lower surface layer 30, and the interlayer 203 is independently selected from a glass fiber cloth reinforced resin composite layer, a basalt fiber cloth reinforced resin composite layer, a quartz fiber cloth reinforced resin composite layer, an aramid fiber cloth reinforced resin composite layer, or a polyimide fiber cloth reinforced resin composite layer. Basalt fiber cloth, aramid fiber cloth, and polyimide fiber cloth have a strength greater than 17.6 cN / dtex and an elastic modulus greater than 440 cN / dtex. Therefore, the fiber cloth reinforced resin composite layer is further preferably a basalt fiber cloth reinforced resin composite layer, an aramid fiber cloth reinforced resin composite layer, or a polyimide fiber cloth reinforced resin composite layer, thereby effectively improving the tensile modulus and strength of the resin-based composite panel in all directions.

[0044] The resin used in the unidirectional fiber-reinforced resin composite layer 201 and the fiber cloth-reinforced resin composite layer is not limited and can be a thermosetting resin or a thermoplastic resin. Thermosetting resins include, but are not limited to, epoxy resins, polyester resins, phenolic resins, and the like. More specifically, epoxy resins include, but are not limited to, bisphenol A epoxy resins, bisphenol F epoxy resins, polyphenol glycidyl ether epoxy resins, aliphatic glycidyl ether epoxy resins, and the like. Thermoplastic resins include, but are not limited to, terpolymers of acrylonitrile, butadiene, and styrene (ABS) resins, polycarbonate resins (PC), polyvinyl chloride resins (PVC), polyphenylene oxide resins (PPO), phenoxy resins (SQP), or polyamide resins (PA).

[0045] Therefore, the present application constructs a sandwich structure by adopting a fiber cloth reinforced resin composite layer and a unidirectional fiber reinforced resin composite layer 201. At the same time, by setting the number of layers and angles of the unidirectional fiber reinforced resin composite layer 201 in the core layer 20, and further adjusting the stacking method of the unidirectional fiber reinforced resin composite layer 201 in the core layer 20 and the selective sandwiching of the interlayer 203, the ratio of the total thickness of the upper surface layer 10 and the lower surface layer 30 to the thickness of the core layer 20 is adjusted, so that the resin-based composite plate has excellent tensile modulus and strength in all directions, and can be suitable for more application scenarios.

[0046] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A resin-based composite board, characterized in that: It includes an upper surface layer, a core layer and a lower surface layer stacked in sequence, wherein the upper surface layer and the lower surface layer are independently selected from a fiber cloth reinforced resin composite layer, and the core layer includes 2N layers of unidirectional fiber reinforced resin composite layers stacked together, N is an integer greater than or equal to 1, the axial direction of the unidirectional fibers in the unidirectional fiber reinforced resin composite layer is the standard direction, and the angle between the standard directions of two adjacent layers of the unidirectional fiber reinforced resin composite layer is 30°-90° in terms of acute angle.

2. The resin-based composite panel according to claim 1, wherein: The included angle between the standard directions of two adjacent unidirectional fiber reinforced resin composite layers is 90°.

3. The resin-based composite board according to claim 1, characterized in that: The two adjacent layers of the unidirectional fiber-reinforced resin composite layer constitute a cross layer, and the core layer includes at least two groups of cross layers. When the number of cross layers in the core layer is an even number, the cross layers in the core layer are centrally symmetrically distributed. When the number of cross layers in the core layer is an odd number, the cross layers in the core layer are centrally symmetrically distributed with the centralmost cross layer as the symmetry axis.

4. The resin-based composite board according to claim 3, characterized in that: The core layer further comprises at least one interlayer, wherein the interlayer is selected from a fiber cloth reinforced resin composite layer, and the interlayer is selectively sandwiched between the two groups of cross layers.

5. The resin-based composite board according to claim 4, characterized in that: The interlayers are centrally symmetrically distributed in the core layer.

6. The resin-based composite board according to claim 5, characterized in that: The number of fiber cloth reinforced resin composite layers in the interlayer is independently selected from one layer or two or more layers, and when the interlayer is centrally symmetrically distributed in the core layer, the number of fiber cloth reinforced resin composite layers in the interlayer centrally symmetrically distributed is equal.

7. The resin-based composite board according to any one of claims 1 to 6, characterized in that: In the resin-based composite board, the ratio of the total thickness of the fiber cloth reinforced resin composite layer to the total thickness of the unidirectional fiber reinforced resin composite layer is 2:13-1:

1.

8. The resin-based composite board according to any one of claims 1 to 6, characterized in that: The number of the fiber cloth reinforced resin composite layers in the upper surface layer and the lower surface layer is independently selected from one layer or two or more layers.

9. The resin-based composite board according to any one of claims 1 to 6, characterized in that: The upper surface layer and the lower surface layer have the same thickness.

10. The resin-based composite panel according to any one of claims 1 to 6, characterized in that: The unidirectional fiber reinforced resin composite layer is selected from a unidirectional aramid fiber reinforced resin composite layer, a unidirectional nylon fiber reinforced resin composite layer, a unidirectional glass fiber reinforced resin composite layer, a unidirectional polyester fiber reinforced resin composite layer or a unidirectional carbon fiber reinforced resin composite layer; And / or, the fiber cloth reinforced resin composite layer is selected from glass fiber cloth reinforced resin composite layer, basalt fiber cloth reinforced resin composite layer, quartz fiber cloth reinforced resin composite layer, aramid fiber cloth reinforced resin composite layer or polyimide fiber cloth reinforced resin composite layer.

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