CN216070216U - Composite fender - Google Patents
Composite fender Download PDFInfo
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- CN216070216U CN216070216U CN202022977156.9U CN202022977156U CN216070216U CN 216070216 U CN216070216 U CN 216070216U CN 202022977156 U CN202022977156 U CN 202022977156U CN 216070216 U CN216070216 U CN 216070216U
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Abstract
The embodiment of the utility model discloses a composite fender, which comprises: a fiber-reinforced composite prepreg layer having a first face and a second face disposed opposite to each other; a first metal thin plate disposed on the first surface; the first metal sheet is bonded with the first surface through an adhesive film; a second metal thin plate disposed on the second surface; the second metal sheet is bonded with the second surface through an adhesive film. According to the composite fender provided by the embodiment of the utility model, the composite fender formed by the sandwich structure obtained by the first metal sheet, the fiber reinforced composite material prepreg layer and the second metal sheet not only makes up for the insufficient rigidity of the metal material, but also enhances the shock resistance of the fiber reinforced composite material, and simultaneously, the fiber reinforced composite material is clamped between the metal sheets, so that the phenomena of aging and the like caused by the contact of the fiber reinforced composite material and high-oxygen media such as air are avoided, and the metal sheet on the outer layer can be matched with the existing automobile coating process.
Description
Technical Field
The embodiment of the utility model relates to the technical field of fiber metal laminate plates, in particular to a composite fender.
Background
At present, with the more prominent environmental protection and energy problems, the more important the lightweight of the automobile. Fiber composite materials are increasingly widely used due to their excellent properties such as high specific strength, high specific modulus, low density, etc. The more commonly used advanced fibers comprise carbon fibers, aramid fibers, basalt fibers, glass fibers, ultra-high molecular weight polyethylene fibers and the like. Compared with the traditional metal material, the fiber reinforced resin matrix composite material still has the defects of poor impact resistance, high cost, poor ductility and the like.
Over thousands of years of development of metal materials, particularly steel materials, the smelting and processing processes are relatively mature, the strength of each variety basically reaches the highest level, the continuous upward breakthrough is very difficult, the density of the metal materials is relatively high, and the metal materials are not the first choice for light weight in many fields. In recent years, although light alloys such as magnesium, aluminum, and lithium have appeared, the application ratio of metal materials has been decreasing in the fields of weight reduction such as aerospace and automobiles. But the metal material has the advantages of high plasticity, wide traditional processing industry foundation and the like which are not possessed by the fiber reinforced resin matrix composite material.
In order to overcome the respective defects of the fiber reinforced resin matrix composite material and the metal material, the advantages of the two materials are brought into play, and the exploration of the advanced fiber reinforced metal material technology has great significance. Conventional steel sheets for automobiles are gradually being made thinner and lighter with higher strength due to weight reduction, but this causes insufficient rigidity, excessive spring-back, and the like due to excessive thinning. The direct use of the conventional fiber composite material for automobiles can improve the phenomenon, but the aging phenomenon caused by illumination, high and low temperature, acid and alkali and the like exists, so that the fiber composite material cannot be applied on a large scale.
The outer covering parts of an automobile engine hood, an automobile door, a fender and the like are sheet formed parts, the thickness is usually 0.8-2.0 mm, and the parts of an automobile door lock and an engine hood lock can be frequently impacted due to frequent opening and closing of the door, or when the automobile is slowly driven, collided and scratched, the concave deformation of the fender is easily caused.
Therefore, how to provide a composite fender capable of solving the problem of insufficient rigidity caused by light weight and thinning of an automobile steel plate and solving the problem of aging phenomenon caused by illumination, high and low temperature and acidity and alkalinity of an automobile fiber reinforced resin matrix composite material is a technical problem to be solved urgently so as to meet the urgent need in the field of light weight of automobiles.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model aims to provide the composite fender, which not only makes up the insufficient rigidity of a metal material, but also enhances the shock resistance of a fiber composite material, and simultaneously clamps the fiber reinforced composite material between metal sheets to avoid the phenomena of aging and the like caused by the contact of the fiber reinforced composite material and high-oxygen media such as air, and the metal sheets on the outer layer can be matched with the existing automobile coating process.
In order to achieve the above object, an embodiment of the present invention provides a composite fender panel including:
a fiber-reinforced composite prepreg layer having a first face and a second face disposed opposite to each other;
a first metal thin plate disposed on the first surface; the first metal sheet is bonded with the first surface through an adhesive film;
a second metal thin plate disposed on the second surface; the second metal sheet is bonded with the second surface through an adhesive film.
Further, the fiber reinforced composite material prepreg layer comprises n layers of fiber reinforced composite material prepreg cloth, wherein n is more than or equal to 1.
Further, the n layers of fiber reinforced composite material prepreg cloths are bonded with each other.
Further, the first metal thin plate and the second metal thin plate are one of a steel plate, an aluminum alloy plate, and a titanium alloy plate.
Further, the thickness of the first metal sheet is 0.5 mm-1 mm.
Furthermore, the thickness of the second metal sheet is 0.5 mm-1 mm.
Further, the adhesive film is an epoxy resin adhesive.
Further, the raw material of the fiber reinforced composite material comprises reinforcing fibers, and the reinforcing fibers comprise at least one of carbon fibers, aramid fibers, glass fibers and basalt fibers.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
according to the composite fender provided by the embodiment of the utility model, the composite fender formed by the sandwich structure obtained by the first metal sheet, the fiber reinforced composite material prepreg layer and the second metal sheet at a certain temperature and under a certain pressure makes up for the insufficient rigidity of the metal material, enhances the impact resistance of the fiber reinforced composite material, and simultaneously clamps the fiber reinforced composite material between the metal sheets to avoid the phenomena of aging and the like caused by the contact of the fiber reinforced composite material and high-oxygen media such as air, and the metal sheet on the outer layer can be matched with the existing automobile coating process.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structure view of a composite fender provided in an embodiment of the utility model;
1. a fiber-reinforced composite prepreg layer; 11. a first side; 12. a second face;
2. a first metal thin plate;
3. a second metal thin plate;
4. and (5) coating the film.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the embodiments of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that the present embodiments and examples are illustrative of the present invention and are not to be construed as limiting the present invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, 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 embodiments of the utility model belong. If there is a conflict, the present specification will control.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the examples of the present invention are commercially available or can be prepared by an existing system. The times of "first", "second", etc. mentioned in the embodiments of the present invention do not represent the order, and may be understood as nouns.
In order to solve the technical problems, the embodiment of the utility model provides the following general ideas:
an embodiment of the present invention provides a composite fender panel, as shown in fig. 1, including:
a fiber-reinforced composite prepreg layer 1 having a first surface 11 and a second surface 12 which are disposed to face each other;
a first metal thin plate 2 provided on the first surface 11; the first metal thin plate 2 is bonded with the first surface 11 through an adhesive film 4;
a second metal thin plate 3 provided on the second surface 12; the first metal sheet is bonded with the second surface through an adhesive film.
According to the composite fender provided by the embodiment of the utility model, the composite fender formed by the sandwich structure obtained by the first metal sheet 2, the fiber reinforced composite material prepreg layer 1 and the second metal sheet 3 at a certain temperature and under a certain pressure not only makes up for the insufficient rigidity of the metal material, but also enhances the shock resistance of the fiber reinforced composite material, and meanwhile, the fiber reinforced composite material is clamped between the metal sheets, so that the phenomena of aging and the like caused by the contact of the metal sheets with high-oxygen media such as air and the like are avoided, and the metal sheet on the outer layer can be matched with the existing automobile coating process.
As an optional embodiment, the fiber reinforced composite material prepreg layer 1 comprises n layers of fiber reinforced composite material prepreg, wherein n is more than or equal to 1.
The n layers of fiber reinforced composite material prepreg cloths are bonded. The fiber prepreg cloth is provided with resin, and when the fiber prepreg cloth is heated and cured, two adjacent layers of prepreg cloth are bonded by the resin without adding an adhesive.
As an alternative embodiment, the first metal thin plate 2 and the second metal thin plate 3 are one of a steel plate, an aluminum alloy plate, and a titanium alloy plate.
The thickness of the first metal thin plate 2 is 0.5mm to 1 mm. The thickness of the second metal thin plate 3 is 0.5 mm-1 mm. The thickness in this range is less resistant to deformation and is easy to form.
As an alternative embodiment, the adhesive film 4 is an epoxy adhesive.
As an alternative embodiment, the raw material of the fiber-reinforced composite material includes reinforcing fibers including at least one of carbon fibers, aramid fibers, glass fibers, and basalt fibers.
The preparation method of the composite fender comprises the following steps:
(1) carrying out surface treatment such as sand blasting coarsening, alcohol/acetone wiping degreasing, acid washing and the like on the non-exposed surfaces of the first metal sheet 2 and the second metal sheet 3;
(2) and uniformly coating a layer of adhesive film 4 on the non-exposed surfaces of the first metal sheet 2 and the second metal sheet 3 after surface treatment.
(3) Cleaning the die, and uniformly coating a metal release agent on the surface of the die for later use;
(4) laying according to the laying mode that the first metal sheet 2 and the second metal sheet 3 are arranged outside and the fiber reinforced composite material prepreg cloth 1 is arranged inside, and coating a layer of glue film 4 between the first metal sheet and the second metal sheet;
(5) pressing and stacking are carried out, pressure is applied from one side to the other side of the paved composite board to drive air, then a metal sheet 2 and a second metal sheet 3 are placed into a mold (the shape of the mold determines the shape of the composite fender) after being fixed on the upper surface and the lower surface of the fiber reinforced composite material prepreg cloth 1, and the mold is closed; the hot pressing temperature is 120-180 ℃, and the pressure is 80kgf/cm2～120kgf/cm2The time is 0.5h to 4 h.
(6) And cooling to room temperature after the time is reached, and demolding to obtain the composite fender.
The present application will be described below by taking specific examples as examples.
Example 1
The first metal sheet 2 and the second metal sheet 3 are made of IF steel with the thickness of 0.2mm, the fiber reinforced composite material prepreg 1 is made of carbon fiber reinforced composite material unidirectional prepreg, the adhesive film 4 is made of 9432 epoxy resin glue, the inner surface and the outer surface of the prepreg are made of IF steel plates, and the middle layer is made of [0/90 ]]36 layers of unidirectional prepreg cloth of carbon fiber reinforced composite material are arranged.
The method comprises the following specific steps: carrying out surface treatment such as sand blasting coarsening, alcohol/acetone wiping degreasing, acid cleaning and the like on the non-exposed surface of the IF steel plate with the thickness of 0.2mm, and then uniformly coating a layer of 9432 epoxy resin glue; the carbon fiber reinforced composite material is unidirectionally presoaked according to the formula [0/90 ]]3Arranging and layering; simultaneously cleaning the die, and uniformly coating a metal release agent on the surface of the die for later use; putting the treated IF steel plate and the laid carbon fiber reinforced composite material prepreg into thePressing and stacking, namely pressing from one side of the laid composite board to the other side of the laid composite board to drive air, fixing the IF steel plate on the upper surface and the lower surface of the carbon fiber reinforced composite material prepreg cloth, putting the prepreg cloth into a mold, and closing the mold; the hot pressing temperature was 140 ℃ and the pressure was 80kgf/cm2The time is 2 hours; and cooling to room temperature after the time is reached, and demolding to obtain the composite fender.
Example 2
The first metal sheet 2 and the second metal sheet 3 both adopt tinned plate substrates with the thickness of 0.2mm, the fiber reinforced composite material prepreg 1 adopts one-way prepreg of carbon fiber reinforced composite material, the adhesive film 4 adopts 9432 epoxy resin glue, the inner surface and the outer surface of the prepreg are the tinned plate substrates, and the middle layer is [0/90 ]]36 layers of unidirectional prepreg cloth of carbon fiber reinforced composite material are arranged.
The method comprises the following specific steps: carrying out surface treatment such as sand blasting coarsening, alcohol/acetone wiping degreasing, acid washing and the like on the non-exposed surface of a tin plate substrate with the thickness of 0.2mm, and then uniformly coating a layer of 9432 epoxy resin glue; the carbon fiber reinforced composite material is unidirectionally presoaked according to the formula [0/90 ]]3Arranging and layering; simultaneously cleaning the die, and uniformly coating a metal release agent on the surface of the die for later use; pressing and overlapping the treated tinned plate substrate and the laid carbon fiber reinforced composite material prepreg cloth, applying pressure from one side of the laid composite board to the other side to drive air, fixing the tinned plate substrate on the upper surface and the lower surface of the carbon fiber reinforced composite material prepreg cloth, putting the tinned plate substrate into a mold, and closing the mold; the hot pressing temperature was 140 ℃ and the pressure was 100kgf/cm2The time is 2 hours; and cooling to room temperature after the time is reached, and demolding to obtain the composite fender.
Example 3
The first metal sheet 2 and the second metal sheet 3 are tin plate substrates with the thickness of 0.2mm, the fiber reinforced composite material prepreg 1 is carbon fiber reinforced composite material unidirectional prepreg, the adhesive film 4 is 9432 epoxy resin glue, the upper surface and the lower surface of the adhesive film are the tin plate substrates, and the middle layer is [0 °/0 °/0 °/0 °/0 °/]6 layers of unidirectional prepreg cloth of carbon fiber reinforced composite material are arranged. The method comprises the following specific steps: carrying out sand blasting coarsening on the non-exposed surface of the tin plate substrate with the thickness of 0.2mmWiping the surfaces with alcohol/acetone to remove grease, pickling and the like, and then uniformly coating a layer of 9432 epoxy resin glue; the unidirectional prepreg cloth of the carbon fiber reinforced composite material is arranged according to the angle of 0 degree/0 degree]Arranging and layering; simultaneously cleaning the die, and uniformly coating a metal release agent on the surface of the die for later use; pressing and overlapping the treated tinned plate substrate and the laid carbon fiber reinforced composite material prepreg cloth, applying pressure from one side of the laid composite board to the other side to drive air, fixing the tinned plate substrate on the upper surface and the lower surface of the carbon fiber reinforced composite material prepreg cloth, putting the tinned plate substrate into a mold, and closing the mold; the hot pressing temperature was 140 ℃ and the pressure was 100kgf/cm2The time is 2 hours; and cooling to room temperature after the time is reached, and demolding to obtain the composite fender.
Example 4
The first metal thin plate 2 and the second metal thin plate 3 are both made of DP590 steel plates with the thickness of 1mm, the fiber reinforced composite material prepreg 1 is made of carbon fiber reinforced composite material unidirectional prepreg, the adhesive film 4 is made of 9432 epoxy resin glue, the upper surface and the lower surface of the adhesive film are made of DP590 steel plates, and the middle layer is [0/90 ]]36 layers of unidirectional prepreg cloth of carbon fiber reinforced composite material are arranged.
The method comprises the following specific steps: carrying out surface treatment such as sand blasting coarsening, alcohol/acetone wiping degreasing, acid cleaning and the like on the non-exposed surface of the DP590 steel plate with the thickness of 1mm, and then uniformly coating a layer of 9432 epoxy resin glue; the carbon fiber reinforced composite material is unidirectionally presoaked according to the formula [0/90 ]]3Arranging and layering; simultaneously cleaning the die, and uniformly coating a metal release agent on the surface of the die for later use; laminating the processed DP590 steel plate and the laid carbon fiber reinforced composite material prepreg cloth, applying pressure from one side of the laid composite plate to the other side to drive air, fixing the DP590 steel plate on the upper surface and the lower surface of the carbon fiber reinforced composite material prepreg cloth, putting the carbon fiber reinforced composite material prepreg cloth into a mold, and closing the mold; the hot pressing temperature was 140 ℃ and the pressure was 120kgf/cm2The time is 2 hours; and cooling to room temperature after the time is reached, and demolding to obtain the composite fender.
Example 5
The first metal sheet 2 and the second metal sheet 3 are both selected from aviation 7 series aluminum alloy with the thickness of 1mmThe metal plate and the fiber reinforced composite material prepreg 1 is made of carbon fiber reinforced composite material unidirectional prepreg, the adhesive film 4 is made of 9432 epoxy resin glue, the upper surface and the lower surface are 7 series aluminum alloy plates, and the middle layer is [0/90 ]]36 layers of unidirectional prepreg cloth of carbon fiber reinforced composite material are arranged.
The method comprises the following specific steps: carrying out surface treatment such as sand blasting coarsening, alcohol/acetone wiping degreasing, acid pickling and the like on the non-exposed surface of the aviation 7-series aluminum alloy plate with the thickness of 1mm, and then uniformly coating a layer of 9432 epoxy resin glue; the carbon fiber reinforced composite material is unidirectionally presoaked according to the formula [0/90 ]]3Arranging and layering; simultaneously cleaning the die, and uniformly coating a metal release agent on the surface of the die for later use; laminating the treated aviation 7-series aluminum alloy plate and the laid carbon fiber reinforced composite material prepreg cloth, pressing from one side of the laid composite plate to the other side to drive air, fixing the aviation 7-series aluminum alloy plate on the upper surface and the lower surface of the carbon fiber reinforced composite material prepreg cloth, putting the carbon fiber reinforced composite material prepreg cloth into a mold, and closing the mold; the hot pressing temperature was 120 ℃ and the pressure was 100kgf/cm2The time is 4 hours; and cooling to room temperature after the time is reached, and demolding to obtain the composite fender.
Example 6
The first metal sheet 2 and the second metal sheet 3 are both made of 6-series aluminum alloy plates with the thickness of 1mm for the automobile outer plate, the fiber-reinforced composite material prepreg 1 is made of carbon fiber-reinforced composite material unidirectional prepreg, the glue film 4 is made of 9432 epoxy resin glue, the upper surface and the lower surface of the glue film are made of 6-series aluminum alloy plates, and the middle layer is [0/90 ]]36 layers of unidirectional prepreg cloth of carbon fiber reinforced composite material are arranged.
The method comprises the following specific steps: carrying out surface treatment such as sand blasting coarsening, alcohol/acetone wiping degreasing, acid pickling and the like on the non-exposed surface of a 6-series aluminum alloy plate with the thickness of 1mm for an automobile outer plate, and then uniformly coating a layer of 9432 epoxy resin glue; the carbon fiber reinforced composite material is unidirectionally presoaked according to the formula [0/90 ]]3Arranging and layering; simultaneously cleaning the die, and uniformly coating a metal release agent on the surface of the die for later use; laminating the treated 6-series aluminum alloy plate for the outer plate of the automobile and the laid carbon fiber reinforced composite material prepreg clothPressing one side of the composite board to the other side to drive air, fixing the outer board of the automobile on the upper surface and the lower surface of the carbon fiber reinforced composite material prepreg cloth by using 6-series aluminum alloy boards, putting the outer board into a mold, and closing the mold; the hot pressing temperature was 120 ℃ and the pressure was 100kgf/cm2The time is 4 hours; and cooling to room temperature after the time is reached, and demolding to obtain the composite fender.
Example 7
The first metal sheet 2 and the second metal sheet 3 are made of 5-series aluminum alloy plates with the thickness of 1mm for the automobile inner panel, the fiber-reinforced composite material prepreg 1 is made of carbon fiber-reinforced composite material unidirectional prepreg, the adhesive film 4 is made of 9432 epoxy resin glue, the upper surface and the lower surface of the adhesive film are made of 5-series aluminum alloy plates, and the middle layer is [0/90 ]]36 layers of unidirectional prepreg cloth of carbon fiber reinforced composite material are arranged.
The method comprises the following specific steps: carrying out surface treatment such as sand blasting coarsening, alcohol/acetone wiping degreasing, acid pickling and the like on the non-exposed surface of a 5-series aluminum alloy plate with the thickness of 1mm for an automobile inner plate, and then uniformly coating a layer of 9432 epoxy resin glue; the carbon fiber reinforced composite material is unidirectionally presoaked according to the formula [0/90 ]]3Arranging and layering; simultaneously cleaning the die, and uniformly coating a metal release agent on the surface of the die for later use; pressing and overlapping the treated 5-series aluminum alloy plate for the automobile inner plate and the laid carbon fiber reinforced composite material prepreg cloth, applying pressure from one side of the laid composite plate to the other side to drive air, fixing the 5-series aluminum alloy plate for the automobile inner plate on the upper surface and the lower surface of the carbon fiber reinforced composite material prepreg cloth, putting the automobile inner plate into a mold, and closing the mold; the hot pressing temperature was 120 ℃ and the pressure was 100kgf/cm2The time is 4 hours; and cooling to room temperature after the time is reached, and demolding to obtain the composite fender.
Example 8
The first metal thin plate 2 and the second metal thin plate 3 are made of TC4 titanium alloy plates with the thickness of 1mm, the fiber-reinforced composite material prepreg 1 is made of carbon fiber-reinforced composite material unidirectional prepreg, the adhesive film 4 is made of 9432 epoxy resin glue, the upper surface and the lower surface of the adhesive film are made of TC4 titanium alloy plates, and the middle layer is [0/90 ]]36 layers of unidirectional prepreg cloth of carbon fiber reinforced composite material are arranged.
The method comprises the following specific steps: carrying out surface treatment such as sand blasting coarsening, alcohol/acetone wiping degreasing, acid washing and the like on the non-exposed surface of the TC4 titanium alloy plate with the thickness of 1mm, and then uniformly coating a layer of 9432 epoxy resin glue; the carbon fiber reinforced composite material is unidirectionally presoaked according to the formula [0/90 ]]3Arranging and layering; simultaneously cleaning the die, and uniformly coating a metal release agent on the surface of the die for later use; laminating the treated TC4 titanium alloy plate and the laid carbon fiber reinforced composite material prepreg cloth, pressing from one side of the laid composite plate to the other side of the laid composite plate to drive air, fixing the TC4 titanium alloy plate on the upper surface and the lower surface of the carbon fiber reinforced composite material prepreg cloth, putting the carbon fiber reinforced composite material prepreg cloth into a mold, and closing the mold; the hot pressing temperature was 180 ℃ and the pressure was 100kgf/cm2The time is 2 hours; and cooling to room temperature after the time is reached, and demolding to obtain the composite fender.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, system, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, system, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the utility model.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the utility model. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the embodiments of the present invention and their equivalents, the embodiments of the present invention are also intended to encompass such modifications and variations.
Claims (6)
1. A composite fender panel, comprising:
a fiber-reinforced composite prepreg layer having a first face and a second face disposed opposite to each other;
a first metal thin plate disposed on the first surface; the first metal sheet is bonded with the first surface through a glue film, and the thickness of the first metal sheet is 0.5-1 mm;
a second metal thin plate disposed on the second surface; the second metal sheet is bonded with the second surface through a glue film, and the thickness of the second metal sheet is 0.5-1 mm.
2. A composite fender according to claim 1 wherein the fibre-reinforced composite prepreg layer comprises n plies of fibre-reinforced composite prepreg, n ≧ 1.
3. A composite fender according to claim 2 wherein the n layers of fibre-reinforced composite prepreg are bonded to one another.
4. A composite fender according to claim 1 wherein the first metallic sheet and the second metallic sheet are one of a steel sheet, an aluminum alloy sheet and a titanium alloy sheet.
5. A composite fender according to claim 1 wherein the adhesive film is an epoxy adhesive.
6. A composite fender according to claim 1 wherein the raw material of the fibre-reinforced composite material comprises reinforcing fibres including at least one of carbon fibres, aramid fibres, glass fibres and basalt fibres.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022977156.9U CN216070216U (en) | 2020-12-08 | 2020-12-08 | Composite fender |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022977156.9U CN216070216U (en) | 2020-12-08 | 2020-12-08 | Composite fender |
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| CN216070216U true CN216070216U (en) | 2022-03-18 |
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