CN220129708U - Composite sandwich board - Google Patents
Composite sandwich board Download PDFInfo
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- CN220129708U CN220129708U CN202320077248.2U CN202320077248U CN220129708U CN 220129708 U CN220129708 U CN 220129708U CN 202320077248 U CN202320077248 U CN 202320077248U CN 220129708 U CN220129708 U CN 220129708U
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- Prior art keywords
- adhesive film
- layer
- hot melt
- melt adhesive
- composite sandwich
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- 239000002131 composite material Substances 0.000 title claims abstract description 40
- 239000004831 Hot glue Substances 0.000 claims abstract description 36
- 239000011162 core material Substances 0.000 claims abstract description 27
- 239000006260 foam Substances 0.000 claims abstract description 25
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 24
- 239000004917 carbon fiber Substances 0.000 claims abstract description 24
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 8
- 239000011159 matrix material Substances 0.000 claims abstract description 6
- 239000004952 Polyamide Substances 0.000 claims description 10
- 229920002647 polyamide Polymers 0.000 claims description 10
- 239000004814 polyurethane Substances 0.000 claims description 9
- 229920000728 polyester Polymers 0.000 claims description 7
- -1 polyethylene Polymers 0.000 claims description 7
- 229920000098 polyolefin Polymers 0.000 claims description 7
- 229920002635 polyurethane Polymers 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 6
- 238000005336 cracking Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 58
- 238000007731 hot pressing Methods 0.000 description 27
- 239000002313 adhesive film Substances 0.000 description 21
- 239000004744 fabric Substances 0.000 description 9
- 238000002844 melting Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- 238000003475 lamination Methods 0.000 description 6
- 239000012943 hotmelt Substances 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229920000271 Kevlar® Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000004761 kevlar Substances 0.000 description 1
- 239000004620 low density foam Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Abstract
The utility model discloses a composite sandwich plate material which is of a laminated structure, wherein a composite material panel, a first interface bonding hot melt adhesive film layer, a toughness layer, a second interface bonding hot melt adhesive film layer and a foam core material layer are sequentially arranged from one side to the other side; the toughness layer is a thermoplastic resin matrix reinforced by chopped carbon fibers or carbon fiber porous felt; the length of the chopped carbon fiber is 2-5mm, and the bulk density of the carbon fiber porous felt is 0.05-0.2g/cm 3 . By adopting the structure, the bonding performance between the composite material panel and the light foam core material can be effectively ensured, and then the peeling or cracking phenomenon of the panel can be effectively prevented, so as to ensure the bearing capacity of the composite material sandwich plate.
Description
Technical Field
The utility model belongs to the technical field of composite sandwich plates, and particularly relates to a composite sandwich plate which adopts a multilayer superposed structure, and the interface bonding strength of a composite panel and a middle core material is effectively improved through the combined forming of a toughness and rigidity combined structure and a foam core material, so that the interlayer peeling damage problem of the composite sandwich structure is avoided.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The composite sandwich plate is a combined sandwich structure formed by laminating low-density light core materials between upper and lower surface panels of a high-strength fiber reinforced composite material, the surface high-strength panel in the structure can effectively prevent buckling and resist out-of-plane shear load, and the middle low-density core material has higher shear strength. The common composite material panel is formed by compounding and curing glass fiber, carbon fiber or Kevlar fiber and thermosetting or thermoplastic resin. Whereas low density core materials are typically made from lightweight foam.
Because the difference of the material types is large, the interface bonding performance of the composite material panel and the light foam core material is unstable, and the panel peeling or cracking phenomenon in the using process is easy to occur so as to influence the bearing capacity. Meanwhile, in order to improve the working efficiency, in the production of the sandwich plate, the prepreg fabric raw material for forming the panel is required to be continuously overlapped with the light foam on a continuous production line and then is required to be solidified, and particularly in the solidification process, the foam core material and the prepreg fabric are required to be integrally carried out at a certain pressure level, the pressure resistance of the foam core material is required to be unstable, and the problem of cracking occurs in the forming process at the pressure level of the prepreg fabric, so that the quality stability of the sandwich plate structure is seriously influenced.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide a composite material sandwich board.
In order to achieve the above object, the present utility model is realized by the following technical scheme:
a composite sandwich plate is of a laminated structure, and a composite panel, a first interface bonding hot melt adhesive film layer, a toughness layer, a second interface bonding hot melt adhesive film layer and a foam core material layer are sequentially arranged from one side to the other side;
the toughness layer is a thermoplastic resin matrix reinforced by chopped carbon fibers or carbon fiber porous felt;
the length of the chopped carbon fiber is 2-5mm, and the bulk density of the carbon fiber porous felt is 0.05-0.2g/cm 3 。
In some embodiments, the first and second layers of interfacial adhesive hot melt film are selected from ethylene vinyl acetate copolymer (EVA), polyurethane (TPU), polyester (PES), polyolefin (PO), or Polyamide (PA).
Preferably, the thickness of the first interfacial adhesive hot melt film layer is 0.03-0.5mm.
Preferably, the thickness of the second interfacial adhesive hot melt film layer is 0.03-0.5mm.
Further preferably, the thickness of the first and second interfacial adhesive hot melt adhesive film layers is 0.1 to 0.4mm.
The melting point is controlled within 65-120deg.C, the hot pressing time is controlled within 10-30 seconds, the hot pressing temperature is controlled within 80-150deg.C, and the hot pressing pressure is 1.5-3Kgf/m 2 。
Preferably, the resin matrix of the tough layer is selected from polyurethane, polyethylene, polypropylene, polyphenylene sulfide or polyamide.
The toughness layer of the resin substrate has better bonding strength with the bonding hot melt adhesive film layer, and can effectively improve the bonding performance between the composite material panel and the light foam core material.
Further preferably, the mass percentage of the resin matrix in the ductile layer is 40% -60%.
In some embodiments, the carbon fibers of the chopped carbon fibers or carbon fiber porous mat are selected from T300, T700, T800, or T1000.
In some embodiments, the thickness of the malleable layer is 0.02-0.5mm.
Preferably, the thickness of the ductile layer is 0.1-0.5mm.
The beneficial effects achieved by one or more embodiments of the present utility model described above are as follows:
the interface strengthening structure of the composite sandwich plate adopts a three-layer strengthening structure combination between the surface of the low-density foam core material and the composite material panel, and comprises a middle carbon fiber interface toughness layer and high-flow interface bonding hot melt adhesive films on the upper surface and the lower surface of the toughness layer. The interface adhesive film on the upper surface is contacted with the prepreg fabric lamination of the composite material panel, and the interface adhesive film on the lower surface is contacted with the foam core material lamination.
The middle carbon fiber interface toughness layer is arranged, so that a certain protection effect is achieved on the foam core material in the preparation process, the pressure resistance of the foam core material is effectively improved, the cracking problem caused by molding under the pressure level of the panel prepreg fabric is prevented, and the quality stability of the sandwich plate is effectively ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
FIG. 1 is a schematic diagram of an interface reinforcement structure of a composite sandwich panel according to an embodiment of the present utility model;
1, bonding a hot melt adhesive film layer on a first interface; 2. a ductile layer; 3. bonding a hot melt adhesive film layer on the second interface; 4. a composite panel; 5. a foam core layer.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
The utility model is further illustrated below with reference to examples.
Example 1
As shown in fig. 1, a composite sandwich board is adopted, which comprises a first interface bonding hot melt adhesive film layer 1, a second interface bonding hot melt adhesive film layer 3 and a middle toughness layer 2, wherein the first interface bonding adhesive film layer 1 is in contact bonding with a prepreg fabric lamination of a composite panel 4, and the second interface bonding hot melt adhesive film layer 3 is in contact bonding with a foam core material layer 5.
In particular, when a bulk density of 55kg/m is used 3 When the light foam core material of the Polymethacrylimide (PMI) is used, a polyurethane (TPU) hot melt adhesive film with the thickness of 0.03mm is stuck on the surface of the light foam core material, the melting point of the adhesive film is 115 ℃, the hot pressing temperature of 135 ℃ is adopted, and the hot pressing time is controlledThe hot pressing pressure was controlled at 1.5Kgf/m at 30 seconds 2 . And laminating and applying an interfacial toughness layer of polyurethane thermoplastic resin with 40% of T300 carbon fiber reinforced content and short-cut length of 2mm on the surface of the interfacial adhesive film, wherein the final thickness of the interfacial toughness layer is 0.02mm. Then a polyurethane (TPU) hot melt adhesive film with the thickness of 0.03mm is stuck on the surface of the ductile layer, the melting point of the adhesive film is 115 ℃, the hot pressing temperature of 135 ℃ is adopted, the hot pressing time is controlled to be 10 seconds, and the hot pressing pressure is controlled to be 1.5Kgf/m 2 。
Example 2
A composite sandwich plate material adopts a first interface bonding hot melt adhesive film layer, a second interface bonding hot melt adhesive film layer and a middle toughness layer, wherein the first interface bonding adhesive film layer is in contact bonding with a prepreg fabric lamination of a composite material panel, and the second interface bonding hot melt adhesive film layer is in contact bonding with a foam core material layer.
In particular, when a bulk density of 75kg/m is used 3 When the Polyurethane (PU) light foam core material is used, a Polyester (PES) hot melt adhesive film with the thickness of 0.05mm is stuck on the surface of the Polyurethane (PU), the melting point of the adhesive film is 120 ℃, the hot pressing temperature of 140 ℃ is adopted, the hot pressing time is controlled to be 20 seconds, and the hot pressing pressure is controlled to be 2Kgf/m 2 . And then laminating and applying an interfacial toughness layer of polyethylene thermoplastic resin with 50% of T700 carbon fiber reinforced content and 3mm of short cut length on the surface of the interfacial adhesive film, wherein the final thickness of the interfacial toughness layer is 0.09mm. Then a Polyester (PES) hot melt adhesive film with the thickness of 0.1mm is stuck on the surface of the ductile layer, the melting point of the adhesive film is 120 ℃, the hot pressing temperature of 140 ℃ is adopted, the hot pressing time is controlled to be 20 seconds, and the hot pressing pressure is controlled to be 2Kgf/m 2 。
Example 3
A composite sandwich plate material adopts a first interface bonding hot melt adhesive film layer, a second interface bonding hot melt adhesive film layer and a middle toughness layer, wherein the first interface bonding adhesive film layer is in contact bonding with a prepreg fabric lamination of a composite material panel, and the second interface bonding hot melt adhesive film layer is in contact bonding with a foam core material layer.
In particular, when a bulk density of 100kg/m is used 3 When the light foam core material of polyvinyl chloride (PVC) is used, a Polyolefin (PO) hot melt adhesive with the thickness of 0.2mm is adhered to the surface of the light foam core materialThe melting point of the film is 125 ℃, the hot pressing temperature of 145 ℃ is adopted, the hot pressing time is controlled to be 16 seconds, and the hot pressing pressure is controlled to be 2Kgf/m 2 . Then the adhesive film is laminated on the surface of the interface adhesive film, and the density of the adhesive film is 0.05g/cm 3 The T800 carbon fiber felt of the (2) is reinforced with an interfacial toughness layer of polypropylene thermoplastic resin with the content of 55%, and the final thickness of the interfacial toughness layer is 0.3mm. Then, a Polyolefin (PO) hot melt adhesive film with the thickness of 0.2mm is stuck on the surface of the ductile layer, the melting point of the adhesive film is 125 ℃, the hot pressing temperature of 145 ℃ is adopted, the hot pressing time is controlled to be 16 seconds, and the hot pressing pressure is controlled to be 2Kgf/m 2 。
Example 4
A composite sandwich plate material adopts a first interface bonding hot melt adhesive film layer, a second interface bonding hot melt adhesive film layer and a middle toughness layer, wherein the first interface bonding adhesive film layer is in contact bonding with a prepreg fabric lamination of a composite material panel, and the second interface bonding hot melt adhesive film layer is in contact bonding with a foam core material layer.
In particular, when a bulk density of 110kg/m is used 3 When the light foam core material of polypropylene (PP) is coated with a Polyamide (PA) hot melt adhesive film with the thickness of 0.5mm, the melting point of the adhesive film is 120 ℃, the hot pressing temperature of 140 ℃ is adopted, the hot pressing time is controlled to be 30 seconds, and the hot pressing pressure is controlled to be 3Kgf/m 2 . Then the adhesive film is laminated on the surface of the interface adhesive film, and the density of the adhesive film is 0.2g/cm 3 The T1000 carbon fiber felt of (2) has an interfacial toughness layer of polyamide thermoplastic resin with a reinforced content of 60%, and the final thickness of the interfacial toughness layer is 0.5mm. Then a Polyamide (PA) hot melt adhesive film with the thickness of 0.5mm is stuck on the surface of the ductile layer, the melting point of the adhesive film is 120 ℃, the hot pressing temperature of 140 ℃ is adopted, the hot pressing time is controlled to be 30 seconds, and the hot pressing pressure is controlled to be 3Kgf/m 2 。
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (9)
1. The composite sandwich board is characterized in that: the composite material panel, the first interface bonding hot melt adhesive film layer, the toughness layer, the second interface bonding hot melt adhesive film layer and the foam core material layer are sequentially arranged from one side to the other side;
the toughness layer is a thermoplastic resin matrix reinforced by chopped carbon fibers or carbon fiber porous felt;
the length of the chopped carbon fiber is 2-5mm.
2. The composite sandwich panel according to claim 1, wherein: the first and second interfacial bonding hot melt adhesive film layers are made of ethylene-vinyl acetate copolymer, polyurethane, polyester, polyolefin or polyamide.
3. The composite sandwich panel according to claim 1, wherein: the thickness of the first interfacial adhesive hot melt adhesive film layer is 0.03-0.5mm.
4. The composite sandwich panel according to claim 1, wherein: the thickness of the second interface bonding hot melt adhesive film layer is 0.03-0.5mm.
5. The composite sandwich panel of claim 3 or 4 wherein: the thickness of the first interface bonding hot melt adhesive film layer and the second interface bonding hot melt adhesive film layer is 0.1-0.4mm.
6. The composite sandwich panel according to claim 1, wherein: the resin matrix of the ductile layer is selected from polyurethane, polyethylene, polypropylene, polyphenylene sulfide or polyamide.
7. The composite sandwich panel according to claim 1, wherein: the carbon fibers of the chopped carbon fibers or the carbon fiber porous felt are selected from T300, T700, T800 or T1000.
8. The composite sandwich panel according to claim 1, wherein: the thickness of the ductile layer is 0.02-0.5mm.
9. The composite sandwich panel of claim 8 wherein: the thickness of the toughness layer is 0.1-0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320077248.2U CN220129708U (en) | 2023-01-09 | 2023-01-09 | Composite sandwich board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320077248.2U CN220129708U (en) | 2023-01-09 | 2023-01-09 | Composite sandwich board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220129708U true CN220129708U (en) | 2023-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320077248.2U Active CN220129708U (en) | 2023-01-09 | 2023-01-09 | Composite sandwich board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220129708U (en) |
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- 2023-01-09 CN CN202320077248.2U patent/CN220129708U/en active Active
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