Honeycomb plate, automobile spare tire cover plate and photovoltaic back plate

Abstract

The utility model discloses a cellular board, an automobile spare tire cover plate and a photovoltaic backboard, and belongs to the technical field of cellular boards. The honeycomb plate comprises an upper panel layer, a honeycomb core layer and a lower panel layer, the honeycomb core layer is formed by bonding and arranging a plurality of round pipes, the round pipes are perpendicular to the upper panel layer and the lower panel layer, and each round pipe comprises a pipe body formed by short glass fiber reinforced thermoplastic resin and an adhesive film layer arranged on the outer surface of the pipe body. And the thickness ratio of the upper panel layer to the honeycomb core layer and the thickness ratio of the lower panel layer to the honeycomb core layer are respectively 1: (5-45). The honeycomb plate is excellent in high-temperature resistance and high in high-temperature bearing capacity, the honeycomb core layer, the upper panel layer and the lower panel layer are good in high-temperature adhesion, the honeycomb core does not collapse even if the honeycomb core is processed and used under the high-temperature condition of 155 DEG C, bulging and layering do not occur after long-term use, and the honeycomb plate is suitable for processing and application under the high-temperature working condition.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of honeycomb panels, and particularly relates to a honeycomb panel, an automobile spare tire cover plate and a photovoltaic back plate. BACKGROUND

[0002] The thermoplastic composite honeycomb panel has been widely applied in many fields such as rail transit, logistics transportation, building materials, electronics and the like due to the characteristics of light weight, high rigidity, impact resistance, moisture resistance, and recyclability. However, the conventional thermoplastic composite honeycomb panel has poor high-temperature resistance, and the mechanical properties thereof are greatly reduced under high-temperature environment, which cannot meet the working condition requirements of high-temperature processing and high-temperature use, resulting in limited downstream application.

[0003] Patent CN 109955546 A discloses a high-temperature-resistant thermoplastic honeycomb panel, which is composed of upper and lower panel layers and an intermediate honeycomb core panel layer. The honeycomb core panel has a honeycomb unit, and the manufacturing raw material of the honeycomb core panel includes a base material and a high-temperature-resistant additive. The high-temperature-resistant additive is one or more of talc, calcium carbonate, mica, wollastonite, kaolin and diatomite. The addition of the high-temperature-resistant additive makes the bending performance retention rate of the panel at 80℃ be more than 70%. However, the peeling force between the panel layer and the honeycomb core panel layer of the panel is low, resulting in a deviation of the mechanical properties thereof at a higher temperature, such as a low compression strength retention rate at 155℃.

[0004] Therefore, it is necessary to develop a technology to make the peeling force between the panel layer and the honeycomb core panel layer of the thermoplastic composite honeycomb panel stronger and capable of resisting a higher temperature. SUMMARY

[0005] Based on the defects of the prior art, the purpose of the present application is to provide a honeycomb panel, an automobile spare tire cover plate and a photovoltaic back plate.

[0006] In order to achieve the above-mentioned purpose, in a first aspect, the present application provides a honeycomb panel, which comprises an upper panel layer, a honeycomb core layer and a lower panel layer. The honeycomb core layer is arranged by a plurality of round pipes which are perpendicular to the upper panel layer and the lower panel layer. The round pipes comprise a pipe body formed by short glass fiber reinforced thermoplastic resin and a glue film layer arranged on the outer surface of the pipe body. The thickness ratio of the upper panel layer and the lower panel layer to the honeycomb core layer is independently 1:(5-45).

[0007] The exposed glass fiber on the end face of the tube body of the honeycomb core layer forms a fiber-reinforced composite interface layer with the bonding interface of the upper and lower panel layers, which is beneficial to improve the peeling force of the upper and lower panel layers and the honeycomb core layer and improve the high-temperature mechanical properties of the honeycomb panel, such as the compression strength retention rate at 155℃. In addition, the thickness ratio of the upper panel layer to the lower panel layer and the honeycomb core layer will affect the bending strength of the honeycomb panel. Controlling the thickness ratio within the range of 1:(5-45) is beneficial to obtain higher bending strength of the honeycomb panel.

[0008] The honeycomb panel has excellent high-temperature performance and strong high-temperature bearing capacity. The honeycomb core layer and the upper and lower panel layers have good high-temperature adhesion, and the honeycomb core does not collapse even under high-temperature conditions of 155℃.

[0009] Preferably, the two end faces of the tube body are exposed to glass fiber.

[0010] Preferably, the weight ratio of the tube body to the adhesive film layer is (4-19):1. When the weight ratio of the tube body to the adhesive film layer is (4-19):1, such as 4:1, 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, 11:1, 12:1, 13:1, 14:1, 15:1, 16:1, 17:1, 18:1, 19:1, etc., the tube body and the adhesive film layer are more closely attached, which can ensure the mechanical properties and good adhesion between the tubes, and finally form a honeycomb structure between the tube body and the adhesive film layer and between the tubes.

[0011] Preferably, the upper panel layer and the lower panel layer are continuous fiber-reinforced thermoplastic composite materials, and the continuous fiber in the upper panel layer and the lower panel layer is mirror-symmetrically laid in the direction.

[0012] Preferably, the upper panel layer and the lower panel layer are each a structure of 2 or more layers, and each single layer is a unidirectional fiber-reinforced thermoplastic composite material. At least one single layer of the upper panel layer and the lower panel layer has a fiber direction along the width direction of the panel, and at least one single layer has a fiber direction along the length direction of the panel. The inventors found in the test process that the upper or lower panel layer has a single-layer structure, and / or lacks continuous fibers distributed in the length direction of the panel, and / or lacks continuous fibers distributed in the length direction of the panel, which will cause the corresponding panel to crack easily during the process of preparing a honeycomb panel by compounding the honeycomb core. When the upper and lower panel layers are each a structure of 2 or more layers, and at least one single layer of the upper and lower panel layers has a fiber direction along the width direction of the panel, and at least one single layer has a fiber direction along the length direction of the panel, the upper and lower panel layers are not prone to cracking during the process of preparing a honeycomb panel by compounding the honeycomb core. More preferably, the upper panel layer and the lower panel layer are each a structure of 2-8 layers.

[0013] Preferably, the thermoplastic resin in the upper panel layer and the lower panel layer is PP, PET or PC.

[0014] Preferably, the continuous fibers in the upper panel layer and the lower panel layer are each independently glass fibers or carbon fibers.

[0015] Preferably, the honeycomb core layer has a bulk density of 80-200 kg / m 3 , a thickness of 5-500 mm, and a circular tube outer diameter of 6-16 mm; the upper panel layer and the lower panel layer each independently have a thickness of 0.24-1.5 mm.

[0016] Preferably, the thermoplastic resin in the short glass fiber reinforced thermoplastic resin is PP, PET or PC.

[0017] Preferably, the adhesive film layer material is a hot melt adhesive resin, and the hot melt adhesive resin in the adhesive film layer is POE or EVA.

[0018] Preferably, in the honeycomb core layer, each two adjacent rows of circular tubes are staggered.

[0019] In a second aspect, the application provides a car spare tire cover plate, which comprises the honeycomb plate.

[0020] In a third aspect, the application provides a photovoltaic back plate, which comprises the honeycomb plate.

[0021] Compared with the prior art, the application has the following beneficial effects:

[0022] (1) In the honeycomb plate of the application, the end face of the tube body of the honeycomb core layer has glass fibers exposed, so that a fiber-reinforced composite interface layer is formed at the bonding interface between the honeycomb core layer and the upper and lower panel layers, which significantly improves the peeling force between the honeycomb core layer and the upper and lower panel layers, and controls the thickness ratio of the upper panel layer and the lower panel layer to the honeycomb core layer within a certain range, so that the bending strength of the honeycomb plate is higher.

[0023] (2) The honeycomb plate of the application has excellent high temperature resistance and strong high temperature bearing capacity, and the honeycomb core layer and the upper and lower panel layers have good high temperature bonding properties, i.e. the honeycomb core layer does not collapse even under the processing and use condition of 155℃ high temperature, and does not have bulging and delamination during long-term use, which is suitable for use in use conditions with high temperature bearing requirements. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic diagram of the honeycomb plate, wherein 1 is the upper panel layer, 2 is the honeycomb core layer, 3 is the lower panel layer, and 20 is the circular tube;

[0025] Figure 2 is a structural schematic diagram of the circular tube in the honeycomb core layer, wherein 21 is the tube body, and 22 is the adhesive film layer;

[0026] Figure 3 A schematic diagram of the distribution of the circular tubes in the honeycomb core. DETAILED DESCRIPTION

[0027] In order to better illustrate the purpose, technical scheme and advantages of the present application, the present application will be further described below in conjunction with specific examples and comparative examples, which are intended to provide a detailed understanding of the content of the present application, rather than limiting the present application. All other examples obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present application. The experimental reagents and instruments involved in the implementation of the present application are all common ordinary reagents and instruments unless otherwise specified. In the present application, the open technical features described include both the closed technical scheme consisting of the listed features and the open technical scheme containing the listed features.

[0028] Reference Figure 1 and 2 A honeycomb panel is provided, which comprises an upper panel layer 1, a honeycomb core layer 2 and a lower panel layer 3, wherein the honeycomb core layer 2 is arranged by bonding a plurality of circular tubes, the circular tubes are perpendicular to the upper panel layer 1 and the lower panel layer 3, the circular tubes comprise a tube body 21 formed by short glass fiber reinforced thermoplastic resin and a film layer 22 arranged on the outer surface of the tube body 21, and the thickness ratio of the upper panel layer 1 and the lower panel layer 3 to the honeycomb core layer 2 is independently 1:(5-45). The two end surfaces of the tube body 21 are exposed to glass fibers, so that the bonding interface between the honeycomb core layer 2 and the upper and lower panel layers forms a fiber-reinforced composite material interface layer, which is beneficial to improve the peeling force of the upper and lower panel layers and improve the high-temperature mechanical properties of the honeycomb panel, such as the compression strength retention rate at 155℃. In addition, by controlling the thickness ratio of the upper panel layer 1 and the lower panel layer 3 to the honeycomb core layer 2 within the range of 1:(5-45), the bending strength of the honeycomb panel can be improved, so that the honeycomb panel has excellent high-temperature performance, strong high-temperature bearing capacity, and good high-temperature bonding between the honeycomb core and the upper and lower panel layers. Even if the honeycomb core is processed and used at a high temperature of 155℃, it will not collapse, and it is suitable for use as a material for automobile spare tire cover plate or photovoltaic back plate, and will not have a blistering delamination after long-term use.

[0029] The thickness ratio of the upper or lower panel layer to the honeycomb core layer 2 can be selected as 1:5.5, 1:10, 1:20, 1:30, 1:40, 1:45 or a range formed by any two of the above values.

[0030] When the weight ratio of the tube body 21 to the adhesive film layer 22 is (4-19):1, such as 4:1, 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, 11:1, 12:1, 13:1, 14:1, 15:1, 16:1, 17:1, 18:1, 19:1, etc., the tube body 21 and the adhesive film layer 22 are more closely attached, which can not only ensure the mechanical properties, but also ensure good adhesion between the tubes, and finally form a honeycomb structure between the tube body and the adhesive film layer and between the tubes.

[0031] The upper panel layer 1 and the lower panel layer 3 are both two-layer or more structures, and each single layer is a unidirectional fiber reinforced thermoplastic composite material. In the upper panel layer 1 and the lower panel layer 3, at least one single layer has a fiber direction along the width direction of the panel, and at least one single layer has a fiber direction along the length direction of the panel. The inventors found in the experiment that the upper or lower panel layer has a single-layer structure, and / or lacks continuous fibers with a direction along the length direction of the panel, and / or lacks continuous fibers with a direction along the length direction of the panel, which can cause the corresponding panel to crack easily during the process of preparing a honeycomb panel by combining the panel with a honeycomb core. When the upper and lower panel layers are both two-layer or more structures, and at least one single layer in the upper and lower panel layers has a fiber direction along the width direction of the panel, and at least one single layer has a fiber direction along the length direction of the panel, the upper and lower panels are not easy to crack during the process of preparing a honeycomb panel by combining the panel with a honeycomb core. The upper panel layer 1 and the lower panel layer 3 can be selected as two-layer to eight-layer structures.

[0032] The thermoplastic resin in the upper panel layer 1 and the lower panel layer 3 can be selected as PP, PET or PC, or a mixture of any two or three thereof. Among them, the PP can be selected as homopolymer PP or copolymer PP, or a mixture of the two.

[0033] The continuous fibers in the upper panel layer 1 and the lower panel layer 3 can be selected as glass fibers or carbon fibers, or a mixture of the two. The types of continuous fibers in the upper panel layer 1 and the lower panel layer 3 can be the same or different.

[0034] The bulk density of the honeycomb core layer 2 can be selected as 80-200 kg / m 3 , such as 80 kg / m 3 , 90 kg / m 3 , 100 kg / m 3 , 110 kg / m 3 , 120 kg / m 3 , 130 kg / m 3 , 140 kg / m 3 , 150 kg / m 3 , 160 kg / m 3 , 170 kg / m 3 , 180 kg / m 3 , 190 kg / m3 200 kg / m 3 or any range formed by any two of the above values.

[0035] The thickness of the honeycomb core layer 2 can be selected from 5-500 mm, such as 5 mm, 7 mm, 10 mm, 30 mm, 50 mm, 70 mm, 100 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 450 mm, 500 mm, or any range formed by any two of the above values.

[0036] The outer diameter of the circular tube can be selected from 6-16 mm, such as 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, or any range formed by any two of the above values.

[0037] The thickness of the upper panel layer 1 and the lower panel layer 3 can be selected from 0.24-1.5 mm, such as 0.24 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, or any range formed by any two of the above values. The thickness of the upper panel layer 1 and the lower panel layer 3 can be the same or different.

[0038] The average length of the short glass fiber in the short glass fiber reinforced thermoplastic resin can be selected from <3 mm, such as 2.9 mm, 2.5 mm, 2.2 mm, 2 mm, 1.8 mm, 1.5 mm, 1.2 mm, 1 mm, 0.8 mm, 0.5 mm, 0.3 mm, 0.1 mm, or any range formed by any two of the above values.

[0039] The aspect ratio of the short glass fiber in the short glass fiber reinforced thermoplastic resin can be selected from 5-100, such as 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, or any range formed by any two of the above values.

[0040] The thermoplastic resin in the short glass fiber reinforced thermoplastic resin can be selected from PP, PET, or PC. The PP can be selected from at least one of homopolymer PP, copolymer PP.

[0041] The material of the adhesive film layer 22 can be selected from at least one of hot melt adhesive resin, such as POE and EVA.

[0042] In the honeycomb core layer 2, the circular tubes can be arranged according to Figure 3 that is, each two adjacent columns of circular tubes are staggered.

[0043] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application and not to limit the scope of protection of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present application.

Claims

1. A honeycomb panel, characterized by, The honeycomb panel comprises an upper panel layer, a honeycomb core layer and a lower panel layer, wherein the honeycomb core layer is formed by bonding a plurality of round tubes arranged in parallel, the round tubes being perpendicular to the upper panel layer and the lower panel layer, the round tubes comprising a tube body formed by short glass fiber reinforced thermoplastic resin and a film layer arranged on the outer surface of the tube body, and the thickness ratio of the upper panel layer and the lower panel layer to the honeycomb core layer is independently 1:(5-45).

2. The honeycomb panel of claim 1, wherein, The two end surfaces of the tube body are bare glass fibers.

3. The honeycomb panel of claim 1, wherein, The weight ratio of the tube body to the film layer is (4-19):

1.

4. The honeycomb panel of claim 1, wherein, The upper panel layer and the lower panel layer are each a structure of two or more layers, and each single layer is a unidirectional fiber reinforced thermoplastic composite material, and at least one single layer of the upper panel layer and the lower panel layer has a fiber direction along the width direction of the panel, and at least one single layer has a fiber direction along the length direction of the panel.

5. The honeycomb panel of claim 4, wherein, The upper panel layer and the lower panel layer are each a structure of two to eight layers.

6. The honeycomb panel of claim 4, wherein, At least one of the following conditions is met: (1) the thermoplastic resin in the upper panel layer and the lower panel layer is PP, PET or PC; (2) the continuous fibers in the upper panel layer and the lower panel layer are independently glass fibers or carbon fibers.

7. The honeycomb panel of claim 1, wherein, The honeycomb core layer has a bulk density of 80-200 kg / m 3 , a thickness of 5-500 mm, and a circular tube outer diameter of 6-16 mm; the upper panel layer and the lower panel layer each independently have a thickness of 0.24-1.5 mm.

8. The honeycomb panel of claim 1, wherein, At least one of the following conditions is met: S1. the thermoplastic resin in the short glass fiber reinforced thermoplastic resin is PP, PET or PC; S2. the film layer material is a hot melt adhesive resin, and the hot melt adhesive resin is POE or EVA; S3. in the honeycomb core layer, each two adjacent columns of round tubes are staggered.

9. A cover for a spare tire for a vehicle, characterized in that The automobile spare tire cover plate comprises the honeycomb panel according to any one of claims 1-8.

10. A photovoltaic backsheet, characterized by, The photovoltaic back plate comprises the honeycomb panel according to any one of claims 1-8.

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