Thermoplastic cellular board

Abstract

The utility model discloses a thermoplastic cellular board, which belongs to the technical field of high polymer materials and comprises a cellular core and a surface layer completely wrapping the outer surface of the cellular core, and the surface layer comprises an upper surface layer, a lower surface layer and a side surface layer. Each of the upper surface layer, the lower surface layer and the side surface layer independently comprises a continuous fiber reinforced thermoplastic composite material sheet and a resin film; the surface layer is arranged on the outer surface of the honeycomb core, the edge of the honeycomb core can be effectively wrapped, the wrapped edge is attractive, the sealing performance is good, edge breakage is not prone to occurring, meanwhile, the upper surface layer, the lower surface layer and the side surface layer are made of the same materials, the honeycomb core can be effectively protected, the sealing effect of the honeycomb core can be effectively improved, the honeycomb plate has the flame-retardant, anti-aging and waterproof functions, and meanwhile the service life of the honeycomb plate is prolonged. And the compressive strength and the bending strength of the cellular board are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polymer materials, in particular to a thermoplastic honeycomb plate. Background Art

[0002] Thermoplastic composite honeycomb panels have been widely used in rail transit, logistics, construction materials, electronics and other fields due to their light weight, high rigidity, impact resistance, moisture resistance, and recyclability. However, due to the special processing technology of the honeycomb core, it has a hollow structure and is difficult to meet the requirements of flame retardancy, anti-aging, and uniform appearance.

[0003] CN107379726A sets an edge sealing area outside the product outline, inserts a high-temperature component between the upper and lower skins of the edge in the edge sealing area, melts and removes the honeycomb and softens the upper and lower skins, and then folds the upper and lower skins toward the middle to achieve the edge sealing of the product. This edge sealing method makes the edge of the product full and firm, increases the edge strength of the product, solves the problem of edge sealing of PPHC materials, and aims to promote the application of PPHC in spare tire covers. However, this processing method removes the honeycomb with hot melt components, which is easy to adhere to the resin, resulting in poor appearance, and is not suitable for batch processing.

[0004] Patent CN113844111A discloses a honeycomb panel with edge banding and its preparation method. The upper and lower skins of the honeycomb panel are made of continuous fiber reinforced thermoplastic composite materials, the upper skin surface is provided with a coating surface and a protective film, the middle structure is a polypropylene honeycomb core, and polypropylene edge banding strips are arranged on both sides of the honeycomb core. The edge banding strips are lock-type, which can solve the problem that there is a certain gap between the two edge banding materials when the finished product is composited; a preparation method is also provided: the upper and lower surfaces are made of continuous fiber reinforced thermoplastic materials, and the upper and lower surfaces are composited with the honeycomb core through a thermal composite process to prepare a honeycomb panel; the edge banding material is circulated on both sides of the honeycomb core so that the edge of each honeycomb core is in contact with the edge banding material; the working parameters of the composite machine are set, the equipment is heated and kept warm for a fixed time, and the honeycomb panel with the edge banding material is sent to the composite machine through a conveyor belt for thermoplastic composite to obtain a honeycomb panel with edge banding. The edge banding honeycomb panel prepared by this scheme has edge banding materials only on both sides.

[0005] Therefore, how to perform edge wrapping on the honeycomb core has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0006] The utility model aims to overcome the shortcomings of the prior art and provide a thermoplastic honeycomb panel. The thermoplastic honeycomb core can effectively wrap the honeycomb core, the wrapping is beautiful, the sealing is good, it is not easy to collapse the edge, and it has excellent mechanical properties and bonding strength.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A thermoplastic honeycomb panel comprises a honeycomb core and a surface layer completely covering the outer surface of the honeycomb core, wherein the surface layer comprises an upper layer, a lower layer and a side layer;

[0009] The upper layer, the lower layer and the side layer each independently comprise a continuous fiber reinforced thermoplastic composite sheet and a resin film;

[0010] The honeycomb core includes a plurality of honeycomb units arranged in an array, and the honeycomb unit includes a resin layer and an adhesive layer arranged in sequence from the inside to the outside.

[0011] Preferably, the continuous fiber reinforced thermoplastic composite sheet comprises continuous fibers and a matrix resin, and the weight ratio of the continuous fibers to the matrix resin is (4-7):(3-6).

[0012] Preferably, the upper layer extends downward to form a first bending portion, and the lower layer extends upward to form a second bending portion, and the first bending portion and the second bending portion constitute the side layer.

[0013] Preferably, the angle a between the first bending portion and the second bending portion is 120°≤a≤180°.

[0014] Preferably, the angle between the upper layer and the first bending portion is b, 90°≤b≤120°.

[0015] Preferably, the angle between the lower layer and the second bending portion is c, 90°≤c≤120°.

[0016] Preferably, the upper layer is arranged in parallel with the lower layer, and the upper layer is arranged perpendicular to the side layer.

[0017] Preferably, the weight ratio of the resin layer to the adhesive layer is (5-10):1.

[0018] Preferably, the thickness of the continuous fiber reinforced thermoplastic composite sheet is 0.3 to 1.2 mm;

[0019] The thickness ratio of the continuous fiber reinforced thermoplastic composite sheet and the resin film is (30-120): (2-15).

[0020] The beneficial effects of the utility model are as follows: the utility model can effectively wrap the honeycomb core by arranging a surface layer on the outer surface of the honeycomb core, the wrapping is beautiful, the sealing is good, and it is not easy to collapse the edge. At the same time, the materials of the upper layer, the lower layer and the side layer are consistent, which can effectively protect the honeycomb core and improve its sealing effect, so that the honeycomb panel has flame retardant, anti-aging and waterproof effects, and at the same time, greatly improves the compression and bending strength of the honeycomb panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the thermoplastic honeycomb panel of the utility model.

[0022] Figure 2 This is another structural schematic diagram of the thermoplastic honeycomb panel of the present invention.

[0023] Figure 3 This is an enlarged schematic diagram of the structure at point A.

[0024] Figure 4 It is a schematic diagram of cutting the side of the semi-finished honeycomb panel of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0026] In this application, when it comes to numerical ranges, unless otherwise specified, the above numerical ranges are deemed to be continuous and include the minimum and maximum values ​​of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges included therein.

[0027] Unless otherwise specified, the components and raw materials used in the embodiments and comparative examples of the present invention are all commercially available raw materials, and the components and raw materials used in each parallel experiment are all of the same kind.

[0028] See also Figure 1 , Figure 2 The utility model provides a thermoplastic honeycomb panel, comprising a honeycomb core 1 and a surface layer completely wrapping the outer surface of the honeycomb core 1, wherein the surface layer comprises an upper layer 2, a lower layer 3, and a side layer 4;

[0029] The upper layer, the lower layer and the side layer each independently comprise a continuous fiber reinforced thermoplastic composite sheet and a resin film;

[0030] The honeycomb core includes a plurality of honeycomb units arranged in an array, and the honeycomb unit includes a resin layer and an adhesive layer arranged in sequence from the inside to the outside.

[0031] The utility model can effectively wrap the honeycomb core by arranging a surface layer on the outer surface of the honeycomb core. The wrapping is beautiful, has good sealing performance, and is not easy to collapse. At the same time, the materials of the upper layer, the lower layer and the side layer are consistent, which can effectively protect the honeycomb core and improve its sealing effect. The honeycomb panel has flame retardant, anti-aging and waterproof effects, and at the same time, the compression and bending strength of the honeycomb panel are greatly improved.

[0032] By using the above-mentioned specific matrix resin as the material of the continuous fiber reinforced thermoplastic composite sheet in the upper layer, the lower layer and the side layer, the mechanical properties and the bonding strength can be effectively improved.

[0033] In one embodiment, the continuous fiber reinforced thermoplastic composite sheet comprises continuous fibers and a matrix resin, and the weight ratio of the continuous fibers to the matrix resin is (4-7):(3-6).

[0034] In one embodiment, the upper layer extends downward to form a first bending portion 101, and the lower layer extends upward to form a second bending portion 102, and the first bending portion and the second bending portion constitute the side layer.

[0035] See also Figure 3 In one embodiment, the angle a between the first bending portion and the second bending portion, 120°≤a≤180°, for example, can be 120°, 130°, 140°, 150°, 160°, 170°, 180° or a range consisting of any two weight ratios thereof.

[0036] In one embodiment, 140°≤a≤160°.

[0037] In one embodiment, the angle between the upper layer and the first bending portion is b, 90°≤b≤120°, for example, it can be 90°, 100°, 110°, 120° or a range consisting of any two weight ratios thereof.

[0038] In one embodiment, 100°≤b≤110°.

[0039] In one embodiment, the angle between the lower layer and the second bending portion is c, 90°≤c≤120°, for example, it can be 90°, 100°, 110°, 120° or a range consisting of any two weight ratios thereof.

[0040] In one embodiment, 100°≤c≤110°.

[0041] In one embodiment, the upper layer is arranged in parallel with the lower layer, and the upper layer is arranged perpendicular to the side layer.

[0042] In one embodiment, the base resin is polyethylene, modified polyethylene, polypropylene, modified polypropylene, polystyrene, modified polystyrene, polycarbonate, modified polycarbonate, polyamide, modified polyamide, polyethylene recycled material, modified polyethylene recycled material, polypropylene recycled material, modified polypropylene recycled material, polystyrene recycled material, modified polystyrene recycled material, polycarbonate recycled material, modified polycarbonate recycled material, polyamide recycled material or modified polyamide recycled material.

[0043] In one embodiment, the base resin of the utility model may include an auxiliary agent, and the auxiliary agent includes at least one of a toughening agent, a compatibilizer, an antioxidant, a weathering agent, a lubricant, a nucleating agent, and an antistatic agent.

[0044] In one embodiment, the base resin is copolymer polypropylene, and the melt index of the copolymer polypropylene at 230°C / 2.16kg is 60 to 120 g / 10min, for example, 60 g / 10min, 70 g / 10min, 80 g / 10min, 90 g / 10min, 100 g / 10min, 110 g / 10min, 120 g / 10min or a range consisting of any two of the values.

[0045] In one embodiment, the continuous fiber is at least one of E glass fiber monofilament yarn and E glass fiber fabric; in the continuous fiber, the weight percentage of volatile matter is not more than 0.1%, the weight percentage of film-forming agent is 0.15-0.45%, the weight percentage of compatibilizer is 0.05-0.15%, the weight percentage of coupling agent is 0.04-0.15%, and the weight ratio percentage of additive is 0.01-0.05%.

[0046] In one embodiment, the film-forming agent includes at least one of amino-modified epoxy resin and cross-linked polyurethane, the compatibilizer includes a silane coupling agent, and the additive includes at least one of polypropylene wax and polyethylene wax.

[0047] In one embodiment, the weight ratio of the resin layer to the adhesive layer is (5-10):1, for example, 5:1, 6:1, 7:1, 8:1, 9:1, 10:1 or a range consisting of any two weight ratios thereof.

[0048] In one embodiment, the resin layer is polyethylene, modified polyethylene, polypropylene, modified polypropylene, polystyrene, modified polystyrene, polycarbonate, modified polycarbonate, polyamide, modified polyamide, polyethylene recycled material, modified polyethylene recycled material, polypropylene recycled material, modified polypropylene recycled material, polystyrene recycled material, modified polystyrene recycled material, polycarbonate recycled material, modified polycarbonate recycled material, polyamide recycled material or modified polyamide recycled material. In one embodiment, the crystallinity of the resin layer is 50-85%, for example, it can be 50%, 60%, 65%, 70%, 75%, 80%, 85% or a range consisting of any two weight ratios thereof.

[0049] In one embodiment, the resin layer has a crystallinity of 60 to 70%.

[0050] The utility model adopts polypropylene with high crystallinity, so as to improve the rigidity of the whole honeycomb board and significantly improve the heat-resistant compression strength of the honeycomb board.

[0051] In one embodiment, the adhesive layer is a polyolefin resin thermoplastic elastomer.

[0052] In one embodiment, the resin film is polyethylene, modified polyethylene, polypropylene, modified polypropylene, polystyrene, modified polystyrene, polycarbonate, modified polycarbonate, polyamide, modified polyamide, polyethylene recycled material, modified polyethylene recycled material, polypropylene recycled material, modified polypropylene recycled material, polystyrene recycled material, modified polystyrene recycled material, polycarbonate recycled material, modified polycarbonate recycled material, polyamide recycled material or modified polyamide recycled material.

[0053] In one embodiment, the resin film of the utility model may include an auxiliary agent, and the auxiliary agent includes at least one of a toughening agent, a compatibilizer, an antioxidant, a weathering agent, a lubricant, a nucleating agent, and an antistatic agent.

[0054] In one embodiment, the toughening agent mentioned in the present invention includes but is not limited to polyolefin resin thermoplastic elastomer, GMA grafted polyolefin resin thermoplastic elastomer, MAH grafted polyolefin resin thermoplastic elastomer and combinations thereof.

[0055] In one embodiment, the antioxidant mentioned in the present invention includes but is not limited to hindered phenol antioxidants, thioether antioxidants, polyaromatic amine antioxidants, hindered amine antioxidants, phosphite antioxidants and combinations thereof.

[0056] In one embodiment, the compatibilizer mentioned in the present invention includes but is not limited to MAH grafted polypropylene, acrylic acid grafted polypropylene, acrylate grafted polypropylene, acrylonitrile grafted polypropylene and combinations thereof.

[0057] In one embodiment, the weathering agent mentioned in the present invention includes but is not limited to hindered amine light stabilizers, benzotriazole ultraviolet light absorbers and combinations thereof.

[0058] In one embodiment, the lubricant mentioned in the present invention includes but is not limited to polyethylene wax, fatty acid ester, hyperbranched amide and a combination thereof.

[0059] In one embodiment, the nucleating agent mentioned in the present invention includes but is not limited to sodium phenylphosphinate, silicon dioxide, talc and a combination thereof.

[0060] In one embodiment, the antistatic agent mentioned in the present invention includes but is not limited to zinc oxide, manganese dioxide, chromium trioxide and a combination thereof.

[0061] It should be noted that the polyolefin resin thermoplastic elastomer (POE) mentioned in the present invention is a thermoplastic elastomer obtained by in-situ polymerization of ethylene and α-olefin using a metallocene catalyst, wherein the α-olefin includes at least one of α-olefins having 4 to 8 carbon atoms.

[0062] In one embodiment, the α-olefin includes at least one of 1-butene, 1-hexene, and 1-octene.

[0063] Furthermore, the polyolefin elastomer is preferably a thermoplastic elastomer obtained by in-situ polymerization of ethylene and 1-octene using a metallocene catalyst.

[0064] In one embodiment, the continuous fiber reinforced thermoplastic composite sheet has a thickness of 0.3-1.2 mm, for example, 0.3 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1 mm, 1.2 mm or a range consisting of any two values ​​therein.

[0065] In one embodiment, the thickness ratio of the continuous fiber reinforced thermoplastic composite sheet and the resin film is (30-120):(2-15).

[0066] In one embodiment, the thickness of the resin film is 20 to 150 μm, for example, 20 μm, 40 μm, 60 μm, 80 μm, 100 μm, 120 μm, 150 μm or a range consisting of any two of these values.

[0067] In one embodiment, the thickness of the thermoplastic honeycomb panel is 5 to 30 mm, for example, 5 mm, 6 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm or a range consisting of any two values ​​therein.

[0068] In one embodiment, the utility model further provides a method for preparing a thermoplastic honeycomb panel, comprising the following steps:

[0069] Providing an upper layer including a continuous fiber reinforced thermoplastic composite material sheet 21 and a resin film 22 and a lower layer including a continuous fiber reinforced thermoplastic composite material sheet 31 and a resin film 32, compounding them at 120-250° C. to obtain a honeycomb panel;

[0070] Use Teflon tape to process the honeycomb panel, so that the static friction coefficient of the honeycomb panel surface is ≥0.8 and the dynamic friction coefficient is ≥0.17;

[0071] Cut the honeycomb panels into semi-finished honeycomb panels, such as Figure 4 As shown, the side of the semi-finished honeycomb panel is cut, the upper layer is folded downward and the lower layer is folded upward in sequence, the edge sealing area is baked, and after the edge sealing area is softened, the upper and lower edge sealing areas are folded toward the middle in sequence to form side layers, which are then cooled and compacted to obtain a thermoplastic honeycomb panel.

[0072] The cutting width range is: final product width + 1 / 2 product thickness ~ final product width + product thickness; the cutting length range is: final product length + 1 / 2 product thickness ~ final product length + product thickness.

[0073] Cut the honeycomb core from the side, the cutting depth is 1 / 2 product thickness ~ product thickness, the reserved thickness of the honeycomb core on the upper and lower surfaces is 1 / 10 honeycomb core thickness ~ 1 / 2 honeycomb core thickness. According to the different thickness of honeycomb core, the thickness of the milling cutter can be changed to obtain grooves of different depths and cutting thicknesses.

[0074] In one embodiment, the utility model also provides an application of the thermoplastic honeycomb panel in the fields of rail transportation, logistics and transportation, building materials and construction, and electronics.

[0075] The following examples are provided to facilitate understanding of the present invention. These examples are not provided to limit the scope of the claims.

[0076] The raw materials used in the embodiments and comparative examples are described as follows:

[0077] Copolymer PP: Copolymer polypropylene, the melt index at 230℃ / 2.16kg is 80g / 10min, manufacturer: Yanshan Petrochemical, brand: K7780.

[0078] Continuous fiber: Manufacturer: China Jushi Co., Ltd., brand: EDR16-1200-362A(U).

[0079] PP-1: Homopolymer polypropylene resin: crystallinity 70%, manufacturer: Hanhua, brand HJ730.

[0080] PP-2: Copolymer polypropylene resin: The melt index at 230℃ / 2.16kg is 7g / 10min. Manufacturer: Sinopec Qilu Petrochemical Company, brand: SP179.

[0081] Nucleating agent: Manufacturer: Milliken, brand: MILLAD3988.

[0082] POE: Manufacturer: Nantong Ruicheng, Brand: RC9030.

[0083] Example 1

[0084] The thermoplastic honeycomb panel of Example 1 includes a honeycomb core and a surface layer completely wrapping the outer surface of the honeycomb core, wherein the surface layer includes an upper layer, a lower layer, and a side layer.

[0085] The upper layer, the lower layer and the side layers each independently include a continuous fiber reinforced thermoplastic composite sheet and a resin film.

[0086] The upper layer extends downward to form a first bending portion, the lower layer extends upward to form a second bending portion, and the first bending portion and the second bending portion constitute the side layer. The upper layer is arranged in parallel with the lower layer, the angle between the first bending portion and the second bending portion is 180°, the angle between the upper layer and the first bending portion is 90°, and the angle between the lower layer and the second bending portion is 90°.

[0087] The continuous fiber reinforced thermoplastic composite sheet comprises continuous fibers and a matrix resin; the weight ratio of the continuous fibers to the matrix resin is 6:4;

[0088] The matrix resin is copolymer PP.

[0089] The honeycomb core includes a plurality of honeycomb units arranged in an array, and the honeycomb unit includes a resin layer and an adhesive layer sequentially arranged from the inside to the outside, and the weight ratio of the resin layer to the adhesive layer is 8:1.

[0090] The resin layer is PP-1.

[0091] The adhesive layer is POE.

[0092] The modified resin film is PP-2.

[0093] The thickness of the continuous fiber reinforced thermoplastic composite sheet is 0.3 mm; the thickness ratio of the continuous fiber reinforced thermoplastic composite sheet to the resin film is 100:10, and the thickness of the thermoplastic honeycomb panel is 10 mm.

[0094] The method for preparing the thermoplastic honeycomb panel comprises the following steps:

[0095] The upper layer, the honeycomb core and the lower layer are laid in order and compounded at 220° C. to obtain a honeycomb panel;

[0096] The honeycomb panel is processed with Teflon tape, so that the static friction coefficient of the honeycomb panel surface is 0.88 and the dynamic friction coefficient is 0.17;

[0097] Cut the honeycomb panel into semi-finished honeycomb panel square panels, such as Figure 3 As shown, the sides of the semi-finished honeycomb panel are cut, and the depth of the milling cutter is 1 / 2 thickness of the honeycomb panel to the product thickness. The upper layer is folded downwards and the lower layer is folded upwards in turn, and the edge sealing area is baked. After the edge sealing area is softened, the upper and lower edge sealing areas are folded toward the middle in turn to form side layers, which are cooled and compacted to obtain the following Figure 1 Thermoplastic honeycomb panel shown.

[0098] Embodiments 2 to 5

[0099] The difference between Examples 2 to 5 and Example 1 is that the thicknesses of the continuous fiber reinforced thermoplastic composite sheet and the resin film are different, and the others are the same.

[0100] The thickness of the continuous fiber reinforced thermoplastic composite sheet in Example 2 is 0.9 mm, and the thickness ratio of the continuous fiber reinforced thermoplastic composite sheet to the resin film is 30:2.

[0101] The thickness of the continuous fiber reinforced thermoplastic composite sheet described in Example 3 is 1.2 mm, and the thickness ratio of the continuous fiber reinforced thermoplastic composite sheet to the resin film is 120:15.

[0102] The thickness of the continuous fiber reinforced thermoplastic composite sheet described in Example 4 is 1.5 mm, and the thickness ratio of the continuous fiber reinforced thermoplastic composite sheet to the resin film is 120:80.

[0103] The thickness of the continuous fiber reinforced thermoplastic composite sheet described in Example 5 is 0.6 mm, and the thickness ratio of the continuous fiber reinforced thermoplastic composite sheet to the resin film is 30:1.

[0104] Embodiments 6 to 8

[0105] The difference between Examples 6 to 8 and Example 1 is that the thickness of the thermoplastic honeycomb panels is different, and the other aspects are the same.

[0106] The thickness of the thermoplastic honeycomb panel in Example 6 is 5 mm.

[0107] The thickness of the thermoplastic honeycomb panel in Example 7 is 15 mm.

[0108] The thickness of the thermoplastic honeycomb panel in Example 8 is 20 mm.

[0109] Examples 9 to 11

[0110] The difference between Examples 9 to 11 and Example 1 is that the angle between the first bending portion and the second bending portion, the angle between the upper layer and the first bending portion, and the angle between the lower layer and the second bending portion are different, and the others are the same.

[0111] In Example 9, the angle between the first bending portion and the second bending portion is 160°, the angle between the upper layer and the first bending portion is 100°, and the angle between the lower layer and the second bending portion is 100°.

[0112] In Example 10, the angle between the first bending portion and the second bending portion is 140°, the angle between the upper layer and the first bending portion is 110°, and the angle between the lower layer and the second bending portion is 110°.

[0113] Embodiment 11: The angle between the first bending portion and the second bending portion is 120°, the angle between the upper layer and the first bending portion is 120°, and the angle between the lower layer and the second bending portion is 120°.

[0114] Comparative Example 1

[0115] The difference between Comparative Example 1 and Example 1 is that Comparative Example 1 does not contain a side layer (ie, Comparative Example 1 is not hemmed), and the other aspects are the same.

[0116] Test Case

[0117] Compression test: refer to GB / T 1453-2005 Test method for flat compression performance of sandwich structure or core, the speed is 0.5mm / min.

[0118] Bending test: refer to GB / T 1456-2005 Sandwich structure bending performance test method, the speed is 5mm / min.

[0119] Peel strength: Refer to GB / T 1457-2005 "Sandwich structure roller peel strength test method" for testing.

[0120] Table 1

[0121]

[0122] It can be seen from Table 1 that the thermoplastic honeycomb panel of the present invention has excellent bending strength, compression strength and peeling strength.

[0123] The thermoplastic honeycomb panel prepared by the utility model has a compression strength of ≥1.09MPa at 23°C, a compression strength of ≥0.13MPa at 90°C, a peel strength of ≥92 (N·mm) / mm, an edge compression strength of ≥1.10MPa, an edge bending strength of ≥8.8MPa, and no abnormality at a bending deflection of 5mm.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the protection scope of the utility model. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A thermoplastic honeycomb panel, characterized in that: It includes a honeycomb core and a surface layer that completely wraps the outer surface of the honeycomb core, wherein the surface layer includes an upper layer, a lower layer, and a side layer; The upper layer, the lower layer and the side layer each independently comprise a continuous fiber reinforced thermoplastic composite sheet and a resin film; The honeycomb core includes a plurality of honeycomb units arranged in an array, and the honeycomb unit includes a resin layer and an adhesive layer arranged in sequence from the inside to the outside.

2. The thermoplastic honeycomb panel according to claim 1, characterized in that: The upper layer extends downward to form a first bending portion, and the lower layer extends upward to form a second bending portion. The first bending portion and the second bending portion constitute the side layer.

3. The thermoplastic honeycomb panel according to claim 2, characterized in that: The angle a between the first bending portion and the second bending portion is 120°≤a≤180°.

4. The thermoplastic honeycomb panel according to claim 2, characterized in that: The angle between the upper layer and the first bending portion is b, 90°≤b≤120°; and / or The included angle between the lower layer and the second bending portion is c, 90°≤c≤120°.

5. The thermoplastic honeycomb panel according to claim 1, characterized in that: The weight ratio of the resin layer to the adhesive layer is (5-10):

1.

6. The thermoplastic honeycomb panel according to claim 1, characterized in that: The upper layer is arranged in parallel with the lower layer.

7. The thermoplastic honeycomb panel according to claim 1, characterized in that: The thickness of the continuous fiber reinforced thermoplastic composite material sheet is 0.3-1.2 mm.

8. The thermoplastic honeycomb panel according to claim 7, characterized in that: The thickness ratio of the continuous fiber reinforced thermoplastic composite sheet and the resin film is (30-120): (2-15).

9. The thermoplastic honeycomb panel according to claim 1, characterized in that: The thickness of the thermoplastic honeycomb panel is 5 to 30 mm.

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