Glass fiber reinforced plastic high-strength plate

Abstract

The utility model relates to a high-strength glass fiber reinforced plastic plate, which belongs to the technical field of glass fiber reinforced plastic plates and comprises at least one fiber reinforced layer, two outermost fiber reinforced layers are provided with surface felt layers with the same number, and two outermost surface felt layers are provided with gel coat layers with the same thickness. And the fiber reinforced layer and the surface felt layer are integrally infiltrated by resin. The method has the effects that the warping phenomenon of the glass fiber reinforced plastic plate is reduced, and the flatness of the glass fiber reinforced plastic plate is improved.

Description

Technical Field

[0001] The present application relates to the technical field of glass fiber reinforced plastic plates, and in particular to a high-strength glass fiber reinforced plastic plate. Background Art

[0002] FRP is also called GFRP, which means fiber reinforced plastic. It generally refers to glass fiber reinforced unsaturated polyester, epoxy resin and phenolic resin matrix. Reinforced plastics with glass fiber or its products as reinforcing materials are called glass fiber reinforced plastics, or FRP, which is different from tempered glass. Due to the different types of resins used, there are polyester FRP, epoxy FRP and phenolic FRP. It is light and hard, non-conductive, stable in performance, high in mechanical strength, less recycled, and corrosion-resistant. It can replace steel to manufacture machine parts and automobile and ship shells. The scientific name of FRP is fiber reinforced plastic, commonly known as FRP, which is fiber reinforced composite plastic. According to the different fibers used, it can be divided into glass fiber reinforced composite plastic, carbon fiber reinforced composite plastic, boron fiber reinforced composite plastic, etc. It is a composite material with glass fiber and its products as reinforcing materials and synthetic resin as matrix material.

[0003] Depending on the application scenario, the FRP sheet is formed by stacking multiple material layers with different functions. All material layers need to be compacted and impregnated with resin, and then cured. During the curing process of the FRP sheet, due to the different density and thickness of the glass fiber in the material layers with different functions, the resin infiltration ratio in each material layer is different, which makes the FRP sheet prone to warping when the resin cures and shrinks. Especially in the continuous machine-made FRP production process, it is difficult to stack and compact multiple material layers with different functions and impregnate the resin well, resulting in low fiber content and large differences in the resin infiltration ratios in different fiber material layers. This makes the FRP sheet low in strength and heavy in fiber texture on the surface of the sheet when the resin cures and shrinks, the sheet is uneven and prone to warping. Utility Model Content

[0004] In order to reduce the warping phenomenon of the FRP sheet, improve the flatness of the FRP sheet, and reduce the fiber texture on the surface of the sheet, the present application provides a high-strength FRP sheet.

[0005] The present application provides a high-strength fiberglass plate adopting the following technical solution:

[0006] A high-strength glass fiber reinforced plastic plate comprises at least one fiber reinforcement layer, wherein the two outermost fiber reinforcement layers are both provided with the same number of surface felt layers, and the fiber reinforcement layers and the surface felt layers are integrally impregnated with resin.

[0007] By adopting the above technical solution, during production, a gel coat resin of a specified thickness is first applied to the membrane plate, and after oven curing, a resin of a specified thickness is applied again, and then a specified number of surface felt layers are laid, and then a specified number of fiber reinforcement layers are laid, and then the same number of surface felt layers are laid again, and resin is applied to the surface felt layers, and the membrane plate is covered for compaction and curing.

[0008] First, since all the fiber layers of this FRP sheet are squeezed with the internal resin through the control of the surface felt, during the resin and fiber impregnation process, due to the presence of the surface felt, each layer of fiber is fixed in a very small displacement range, not easy to fall apart, and can make each layer of fiber squeezed to the minimum thickness as much as possible and the internal resin is uniform, thus improving the strength of the FRP sheet. At the same time, the surface felt design can cover the fiber texture on the surface of the sheet, improving the aesthetics and adaptability of the sheet.

[0009] Secondly, since all the fiber layers of this FRP sheet are symmetrical about the cutting surface, and the two symmetrical layers have the same density and fiber thickness, the resin impregnation ratio of the two symmetrical layers is the same, so the resin can shrink evenly, thereby reducing the warping of the FRP sheet and improving the flatness of the FRP sheet.

[0010] Optionally, the surface felt layer may be a glass fiber layer / polyester fiber layer / carbon fiber layer / basalt fiber layer;

[0011] The fiber reinforcement layer can be a glass fiber layer / polyester fiber layer / carbon fiber layer / basalt fiber layer

[0012] Optionally, the fiber reinforced layer is provided with a plurality of layers, the plurality of fiber reinforced layers are stacked, the surface felt layer is located on the outermost fiber reinforced layer, and the plurality of fiber reinforced layers and the surface felt layer are integrally impregnated with resin.

[0013] By adopting the above technical solution, the provision of multiple fiber reinforcement layers is beneficial to improving the overall strength of the FRP sheet.

[0014] Optionally, an impact-resistant layer is provided between the fiber-reinforced layer and the surface felt layer, the fiber-reinforced layer, the impact-resistant layer and the surface felt layer are all infiltrated with resin as a whole, and the number of impact-resistant layers bonded to two layers of the surface felt is the same.

[0015] By adopting the above technical scheme, the setting of the impact-resistant layer is beneficial to further improve the structural strength of the FRP plate, and the impact-resistant layer is also symmetrically arranged about the center section of the FRP plate, so that the resin infiltration ratio of the two symmetrical impact-resistant layers is the same, reducing the warping phenomenon of the FRP plate.

[0016] Optionally, the impact-resistant base layer may be a glass fiber layer / polyester fiber layer / carbon fiber layer / basalt fiber layer, etc.

[0017] Optionally, a gel coat layer is provided on the surface felt layer on one side, and a bottom film layer is provided on a side of the gel coat layer facing away from the surface felt layer, and the bottom film layer includes a PET polyester film.

[0018] By adopting the above technical solution, the provision of the bottom mold layer can improve the adhesion between the surface felt and the fiber reinforcement layer and the resin, thereby increasing the stability and durability of the overall structure, and the bottom mold can provide a better foundation for subsequent coating, spraying or bonding, making the fiberglass sheet easier to process and handle.

[0019] Moreover, PET polyester film has excellent wear resistance, folding resistance, pinhole resistance and tear resistance, and the heat shrinkage of PET polyester film is very small. In addition, PET polyester film has good antistatic properties, which effectively reduces the possibility of dust adsorbing on the surface of FRP sheet, further improves the dirt resistance of FRP sheet, has good anti-fouling effect, and thus improves the cleanliness of the surface of FRP sheet.

[0020] Optionally, the base film layer is a PET polyester film with a glossiness of 5°-250° and a thickness of 5-500 microns.

[0021] Optionally, a protective layer is provided on a side of the gel coat layer facing away from the surface felt layer, and the protective layer includes a PE film.

[0022] By adopting the above technical solution, the protective layer can reduce the influence of the external environment on the FRP sheet, such as sunlight, rain and chemicals, thereby increasing its weather resistance and corrosion resistance.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. Since all the fiber layers of the FRP sheet are symmetrical about the section plane, and the two symmetrical layers have the same density and fiber thickness, the two symmetrical layers have the same resin impregnation ratio, so the resin can shrink evenly and the shrinkage rate is greatly reduced, thereby reducing the warping of the FRP sheet, improving the flatness of the FRP sheet, covering the fiber texture on the surface of the sheet, and improving the aesthetics and adaptability of the sheet;

[0025] 2. The setting of multiple fiber reinforcement layers is beneficial to improving the overall strength of FRP sheets;

[0026] 3. The setting of the impact-resistant layer is beneficial to further improve the structural strength of the FRP sheet, and the impact-resistant layer is also symmetrically arranged about the center section of the FRP sheet, so that the resin infiltration ratio of the two relatively symmetrical impact-resistant layers is the same, reducing the warping phenomenon of the FRP sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0028] Figure 2 This is a schematic diagram of the structure of Example 1 of the present application for tearing off the upper bottom film layer of the finished plate.

[0029] Figure 3 This is a schematic diagram of the structure of Example 1 of the present application for replacing the bottom film with a protective layer

[0030] Figure 4 It is a schematic diagram of the overall structure of Example 2 of the present application.

[0031] Explanation of reference numerals: 1. base film layer; 2. gel coat layer; 3. surface felt layer; 4. fiber reinforcement layer; 5. protective layer; 6. impact resistant layer. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] Example 1 of the present application discloses a high-strength fiberglass plate.

[0034] like Figure 1 The high-strength FRP sheet comprises two bottom film layers 1, one gel coat layer 2, two surface felt layers 3 and at least two fiber reinforcement layers 4. The two bottom film layers 1 are divided into an upper bottom film layer 1 and a lower bottom film layer 1, and the two surface felt layers 3 are divided into an upper surface felt layer 3 and a lower surface felt layer 3.

[0035] The lower base film layer 1 is the bottom layer, the upper surface of the lower base film layer 1 is provided with a gel coat layer 2, the upper surface of the lower gel coat layer 2 is provided with a lower surface felt layer 3, and the lower surface felt layer 3 is provided with a fiber reinforcement layer 4. In the embodiment of the present application, the fiber reinforcement layer 4 has two layers, and in other embodiments, the fiber reinforcement layer 4 may have one layer, three layers or even more layers. The upper surface felt layer 3 is provided on the upper surface of the fiber reinforcement layer 4 located at the top, and the upper surface of the upper surface felt layer 3 is provided with an upper base film layer 1. The upper surface felt layer 3, the fiber reinforcement layer 4 and the lower surface felt layer 3 are impregnated with resin together.

[0036] During production, a gel coat resin of a specified thickness is first applied on the lower base film layer 1 as a gel coat layer 2, and after oven curing, a resin of a specified thickness is applied again on the upper surface of the gel coat layer 2, and then a lower surface felt layer 3 is laid, and two layers of fiber reinforcement layers 4 are laid, and an upper surface felt layer 3 is laid on the top fiber reinforcement layer 4, and a resin of a specified thickness is applied again on the top surface of the upper surface felt layer 3, and then the upper base film layer 1 is laid, and finally the whole is compacted and cured to form a glass fiber reinforced plastic sheet. The setting of multiple fiber reinforcement layers 4 is conducive to improving the overall strength of the glass fiber reinforced plastic sheet.

[0037] In other embodiments, in order to further improve the anti-warping ability and form a more integrated stacked structure, an upper gel coat layer 2 may be laid on the upper surface felt layer 3 .

[0038] In the embodiment of the present application, the fiber reinforcement layer 4 is made of glass fiber mat or glass fiber cloth weighing 15 grams per square meter to 1000 grams per square meter, or glass fiber mat and glass fiber cloth are mixed and laid according to regulations, the surface felt layer 3 is made of glass fiber with a thickness of 0.1 mm to 1 mm, and the bottom film layer 1 is a PET polyester film. A PET polyester film with a glossiness of 5° to 250° and a thickness of 5 to 500 microns can be used. In other embodiments, the fiber reinforcement layer 4 can be a polyester fiber layer / carbon fiber layer / basalt fiber layer, etc., and the surface felt layer 3 can also be a polyester fiber layer / carbon fiber layer / basalt fiber layer, etc.

[0039] PET polyester film has excellent wear resistance, folding resistance, pinhole resistance and tear resistance, and the heat shrinkage of PET polyester film is very small. In addition, PET polyester film has good antistatic properties, which effectively reduces the possibility of dust adsorbing on the surface of FRP sheets, further improves the dirt resistance of FRP sheets, has good anti-fouling effect, and thus improves the cleanliness of the surface of FRP sheets.

[0040] like Figure 2 After the board is made, the upper bottom film layer 1 is torn off, and only the lower bottom film layer 1 is retained. Figure 3 , and according to the needs, the bottom film layer 1 can also be torn off and replaced with the protective layer 5. The protective layer 5 can be made of PE film.

[0041] The protective layer 5 can reduce the influence of the external environment on the glass fiber reinforced plastic sheet, such as sunlight, rain and chemicals, thereby increasing its weather resistance and corrosion resistance.

[0042] The implementation principle of the embodiment of the present application is as follows: since all the fiber layers of the FRP sheet are symmetrical about the cross-section thereof, and the two symmetrical layers have the same density and the same fiber thickness, and all the fiber layers of the FRP sheet are squeezed with the internal resin through the control of the surface felt, during the resin and fiber impregnation process, due to the presence of the surface felt, each layer of fiber is fixed in a very small displacement range and is not easy to fall apart, and each fiber layer can be squeezed to the minimum thickness as much as possible and the internal resin is uniform, so the resin impregnation ratio of the two symmetrical layers is the same, so that the resin can shrink evenly and the shrinkage rate is greatly reduced, thereby reducing the warping phenomenon of the FRP sheet, improving the flatness of the FRP sheet, and improving the strength of the FRP sheet. At the same time, the surface felt design can conceal the fiber texture on the surface of the sheet, thereby improving the aesthetics and adaptability of the sheet.

[0043] Example 2

[0044] Reference Figure 4 The difference between this embodiment and embodiment 1 is that an impact-resistant layer 6 is provided between the lower surface felt layer 3 and the fiber-reinforced layer 4, and the same number of impact-resistant layers 6 are also provided between the upper surface felt layer 3 and the fiber-reinforced layer 4. The surface felt layer 3, the fiber-reinforced layer 4 and the impact-resistant layer 6 are impregnated with resin together. In the embodiment of the present application, the impact-resistant layer 6 between the lower surface felt layer 3 and the fiber-reinforced layer 4 is a single layer, and the impact-resistant layer 6 of other embodiments may be multiple layers.

[0045] The impact-resistant layer 6 can be a fiber woven cloth, or it can be made of materials such as glass fiber cloth / carbon fiber cloth / basalt fiber cloth / polyester fiber cloth. In this embodiment, the impact-resistant layer 6 is made of glass fiber weighing 100 grams per square meter to 1000 grams per square meter, and the angle formed between the fibers in the impact-resistant layer 6 is 0° to 180°.

[0046] During production, a gel coat resin of a specified thickness is first applied on the lower base film layer 1 as a gel coat layer 2, and after oven curing treatment, a resin of a specified thickness is applied again on the upper surface of the gel coat layer 2, and then the lower surface felt layer 3 is laid, and an impact-resistant layer 6 is laid on the top surface of the lower surface felt layer 3, and then a fiber reinforcement layer 4 is laid. The fiber reinforcement layer 4 can be one or more layers. In the embodiment of the present application, the fiber reinforcement layer 4 is one layer, and then the same number of impact-resistant layers 6 are laid on the top surface of the fiber reinforcement layer 4, and then the upper surface felt layer 3 is laid. A resin of a specified thickness is applied again on the top surface of the upper surface felt layer 3, and then the upper base film layer 1 is laid, and finally the whole is compacted and cured to form a glass fiber reinforced plastic sheet.

[0047] A resin of a specified thickness is coated on the top surface of the lower surface felt layer 3, and then the impact-resistant layer 6 is laid, followed by the fiber reinforced layer 4. The fiber reinforced layer 4 can be one layer or multiple layers. In the embodiment of the present application, the fiber reinforced layer 4 is a single layer. Then, a resin of a specified thickness is coated on the top surface of the fiber reinforced layer 4, and then the upper surface felt layer 3 is laid.

[0048] The setting of the impact-resistant layer 6 is beneficial to further improve the structural strength of the FRP sheet, and the impact-resistant layer 6 is also symmetrically arranged about the center section of the FRP sheet, so that the resin infiltration ratio of the two symmetrical impact-resistant layers 6 is the same, reducing the warping phenomenon of the FRP sheet.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-strength fiberglass sheet, characterized in that: It comprises at least one fiber reinforced layer (4), and the two outermost fiber reinforced layers (4) are both provided with the same number of surface felt layers (3), and the fiber reinforced layers (4) and the surface felt layers (3) are integrally impregnated with resin.

2. The high-strength fiberglass sheet according to claim 1, characterized in that: The surface felt layer (3) is a glass fiber layer / polyester fiber layer / carbon fiber layer / basalt fiber layer; The fiber-reinforced layer (4) is a glass fiber layer / polyester fiber layer / carbon fiber layer / basalt fiber layer.

3. The high-strength fiberglass reinforced plastic sheet according to claim 1, characterized in that: The fiber reinforced layer (4) is provided with a plurality of layers, and the plurality of fiber reinforced layers (4) are stacked and arranged, the surface felt layer (3) is located on the outermost fiber reinforced layer (4), and the plurality of fiber reinforced layers (4) and the surface felt layer (3) are integrally impregnated with resin.

4. The high-strength fiberglass reinforced plastic sheet according to any one of claims 1 or 3, characterized in that: An impact-resistant layer (6) is provided between the fiber-reinforced layer (4) and the surface felt layer (3); the fiber-reinforced layer (4), the impact-resistant layer (6) and the surface felt layer (3) are all impregnated with resin as a whole, and the number of impact-resistant layers (6) bonded to the two layers of the surface felt layer (3) is the same.

5. The high-strength fiberglass reinforced plastic sheet according to claim 4, characterized in that: The impact-resistant layer (6) is a glass fiber layer / polyester fiber layer / carbon fiber layer / basalt fiber layer.

6. The high-strength fiberglass sheet according to claim 1, characterized in that: A gel coat layer (2) is arranged on at least one side of the surface felt layer (3), and a bottom film layer (1) is arranged on the side of the gel coat layer (2) facing away from the surface felt layer (3), wherein the bottom film layer (1) comprises a PET polyester film.

7. The high-strength fiberglass reinforced plastic sheet according to claim 6, characterized in that: The base film layer (1) is a PET polyester film with a glossiness of 5°-250° and a thickness of 5-500 microns.

8. The high-strength fiberglass reinforced plastic sheet according to claim 6, characterized in that: A protective layer (5) is provided on the side of the gel coat layer (2) facing away from the surface felt layer (3), and the protective layer (5) comprises a PE film.

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