Plate manufactured by recycling glass fiber reinforced plastic and polyurethane and preparation method

Abstract

The invention relates to the technical field of material recycling and manufacturing, in particular to a plate manufactured by recycling glass fiber reinforced plastic and polyurethane and a preparation method. The plate manufactured by recycling the glass fiber reinforced plastic and the polyurethane is prepared from 40 to 100 parts of recycled polyurethane rigid foam, 20 to 50 parts of recycled glass fiber, 1 to 5 parts of silane coupling agent, 50 to 200 parts of adhesive, 5 to 50 parts of solvent and 0.1 to 2 parts of water. The polyurethane rigid foam and the glass fiber are recycled, so that the generation of wastes of the materials is remarkably reduced, and the recycling of resources is promoted. Therefore, the demand pressure on native resources is reduced, the environmental pollution is reduced, and the method conforms to the concept of green and sustainable development.

Description

Technical Field

[0001] The invention relates to the technical field of material recycling and manufacturing, and in particular to a plate made by recycling glass fiber reinforced plastics and polyurethane and a preparation method thereof. Background Art

[0002] Composite materials have excellent properties such as light weight, high strength, corrosion resistance, and long service life, and are widely used in various civilian and military industries. However, the scraps and scraps of composite materials are difficult to recycle and reuse. Rigid polyurethane foam has excellent waterproof, thermal insulation, and weather resistance properties, and is widely used in refrigerators, automobiles, construction, and other fields. However, rigid polyurethane foam is also a thermosetting material and is difficult to decompose and recycle.

[0003] Existing physical recycling mainly adds FRP recycled materials into concrete or asphalt, but the added material is low and cannot be applied on a large scale. Moreover, the addition of waste materials will destroy the original system and reduce the performance of the original product. Chinese patent CN 106478019B describes a bonding mortar reinforced with waste FRP fibers. FRP powder and waste FRP fibers are added to cement, river sand and other materials to prepare mortar. The overall proportion of FRP recycled materials in this method is low, with the highest proportion being 21 parts, and the lowest proportion of cement and river sand being 294 parts. It is impossible to dispose of FRP waste in large quantities.

[0004] Because FRP is a composite of epoxy resin or unsaturated resin and glass fiber materials, its powder contains both organic resin and fiber inorganic materials. Due to the limitations of existing technology, FRP physical recycling cannot completely separate the resin and fiber. As a result, when FRP powder is added to other materials, there will always be resin or fiber that affects the original product system formula, causing the original product performance to decline.

[0005] The present invention provides a glass fiber reinforced plastic material and polyurethane material recycling process method, using recycled polyurethane rigid foam and waste glass fiber reinforced plastic fiber as main raw materials to prepare composite wood board. Currently, there are no related reports and academic literature on the use of waste foam and waste fiber to prepare wood board. Summary of the invention

[0006] The object of the present invention is to provide a plate made by recycling glass fiber reinforced plastics and polyurethane and a preparation method thereof, so as to solve at least one technical problem existing in the prior art.

[0007] In order to solve the above technical problems, the present invention provides a board made of recycled fiberglass and polyurethane, including 40-100 parts of recycled polyurethane rigid foam, 20-50 parts of recycled glass fiber, 1-5 parts of silane coupling agent, 50-200 parts of adhesive, 5-50 parts of solvent and 0.1-2 parts of water.

[0008] Furthermore, the recycled polyurethane rigid foam is in powder form, and its particle size is ≤10 mm.

[0009] Furthermore, the length of the recycled glass fiber is between 5-10 mm.

[0010] Furthermore, the silane coupling agent includes one or more of KH-550, KH-560, KH-570, Z-6011, Z-6040, KBM-903, and KBM-403.

[0011] Furthermore, the adhesive is a polyurethane adhesive.

[0012] Furthermore, the solvent includes one or more of acetone, dichloromethane, toluene, butanone, cyclohexanone, and ethyl acetate.

[0013] On the other hand, the present application also discloses a method for preparing a plate made by recycling glass fiber reinforced plastics and polyurethane, which specifically comprises the steps of: S1: Mix the polyurethane adhesive, solvent, water and silane coupling agent in corresponding proportions, stir evenly and use as an adhesive; S2: Mix the recycled glass fiber and the recycled polyurethane rigid foam according to a certain proportion, and pre-mix them so that the fiber can be evenly distributed in the foam to form recycled material; S3: Pour the prepared adhesive into the recycled material mixed in step S2, and stir for 3-5 minutes until it is evenly mixed; S4: Pour the material of step S4 into the mold according to the weight of the corresponding density pair, and perform molding under the conditions of molding temperature of 100°C-140°C, molding pressure of 20-50Bar, and molding time of 30-60min to obtain a molded wood board.

[0014] Preferably, the molding temperature is 120°C.

[0015] Preferably, the molding pressure is 30 Bar.

[0016] Preferably, the molding time is 30 minutes.

[0017] By adopting the above technical solution, the present invention has the following beneficial effects: (1) By recycling polyurethane rigid foam and glass fiber, the waste generation of these materials is significantly reduced, and the recycling of resources is promoted. This not only helps to reduce the pressure on the demand for virgin resources, but also reduces environmental pollution, which is in line with the concept of green and sustainable development.

[0018] (2) The use of silane coupling agent as a modifier enhances the interfacial bonding between the recycled polyurethane rigid foam and the glass fiber, improving the overall strength and stability of the board. At the same time, the selection of polyurethane adhesive ensures good bonding between the materials, making the board perform well in mechanical properties.

[0019] (3) During the preparation process, efficient production of the sheet was achieved by precisely controlling the raw material ratio and molding conditions (such as temperature, pressure, and time). In particular, the optimized molding parameters (such as 120°C molding temperature, 30 Bar molding pressure, and 30 min molding time) not only shortened the production cycle, but also reduced energy consumption and production costs, thereby improving economic benefits.

[0020] (4) The various types of silane coupling agents and solvents mentioned in the technical solution provide the possibility of producing panels with different performance requirements. By adjusting the formula, panels with different strength, hardness, weather resistance and other properties can be prepared to meet the needs of different application scenarios.

[0021] (5) The successful application of this technical solution is expected to promote the technological upgrading and transformation of related industries. By introducing advanced material recycling and reuse technologies, it will promote the development of the traditional building materials industry in the direction of green, low-carbon and recycling, and enhance the competitiveness and sustainable development capabilities of the entire industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 The present invention is a specific flow chart of a method for preparing a plate made of recycled fiberglass and polyurethane. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] It should also be noted that the following specific embodiments or specific implementations are a series of optimized settings listed in the present invention to further explain the specific content of the invention, and these settings can be used in combination or in association with each other.

[0028] The present invention is further explained below in conjunction with specific implementation modes.

[0029] Example 1 like Figure 1 As shown, the present embodiment provides a board made of recycled fiberglass and polyurethane, including 40-100 parts of recycled polyurethane rigid foam, 20-50 parts of recycled glass fiber, 1-5 parts of silane coupling agent, 50-200 parts of adhesive, 5-50 parts of solvent, and 0.1-2 parts of water.

[0030] As a further implementation of this example, the recycled polyurethane rigid foam is in powder form, and its particle size is ≤10 mm.

[0031] As a further implementation of this embodiment, the length of the recycled glass fiber is between 5-10 mm.

[0032] As a further implementation of this embodiment, the silane coupling agent includes one or more of KH-550, KH-560, KH-570, Z-6011, Z-6040, KBM-903, and KBM-403.

[0033] As a further implementation of this embodiment, the adhesive is a polyurethane adhesive.

[0034] As a further implementation of this embodiment, the solvent includes one or more of acetone, dichloromethane, toluene, butanone, cyclohexanone, and ethyl acetate.

[0035] The board produced by the method of the present invention can realize the recycling of rigid polyurethane foam and fiberglass waste, and can solve the problem of the difficulty in recycling these two materials at the same time. On the other hand, it can not only be applied to boards, but also different products can be molded according to the requirements of product shape, density, etc., so as to expand the application range and usage of such products.

[0036] By adopting the above technical solution, the present invention has the following beneficial effects: (1) It effectively achieved the high-value recycling of rigid polyurethane foam and fiberglass waste, reduced the pollution of these wastes to the environment, and promoted the circular economy and sustainable development of resources.

[0037] (2) Using recycled materials as raw materials significantly reduces production costs, while increasing the economic value of waste and creating new profit space for enterprises.

[0038] (3) Through a specific formula, including the use of a specific type of silane coupling agent to enhance the bonding strength between materials, and the use of polyurethane adhesives to improve overall strength, the manufactured panels have excellent physical properties and chemical stability, meeting a variety of usage requirements.

[0039] (4) The sheet material is not limited to traditional sheet material applications. It can also be flexibly customized into products of different shapes and densities according to specific needs through the molding process, which greatly broadens the application field and market prospects of the material.

[0040] (5) During the production process, environmentally friendly solvents (such as acetone, dichloromethane, etc.) are used and the use of water is strictly controlled, which reduces the negative impact on the environment and embodies the concept of green production.

[0041] Example 2 like Figure 1 As shown, the present embodiment provides a method for preparing a plate made by recycling glass fiber reinforced plastics and polyurethane, which specifically includes the steps of: S1: Mix the polyurethane adhesive, solvent, water and silane coupling agent in corresponding proportions, stir evenly and use as an adhesive; S2: Mix the recycled glass fiber and the recycled polyurethane rigid foam according to a certain proportion, and pre-mix them so that the fiber can be evenly distributed in the foam to form recycled material; S3: Pour the prepared adhesive into the recycled material mixed in step S2, and stir for 3-5 minutes until it is evenly mixed; S4: Pour the material of step S4 into the mold according to the weight of the corresponding density pair, and perform molding under the conditions of molding temperature of 100°C-140°C, molding pressure of 20-50Bar, and molding time of 30-60min to obtain a molded wood board.

[0042] As a preferred implementation mode of this embodiment, the molding temperature is 120°C.

[0043] As a preferred implementation of this embodiment, the molding pressure is 30 Bar.

[0044] As a preferred implementation of this embodiment, the molding time is 30 minutes.

[0045] The process of the present invention uses recycled rigid foam as the main material. Since the polarity of the urethane group in the polyurethane molecular structure is relatively strong as that of the epoxy resin, when the materials are mixed, a physical force can be formed between the polar groups of the two materials, so that the epoxy resin powder and the polyurethane foam powder are more tightly combined. After being treated with a coupling agent, the glass fiber attached to the surface of the epoxy resin powder can be better bonded to the adhesive and the recycled polyurethane foam, thereby improving the bonding stability of the overall board.

[0046] By adopting the above technical solution, the present invention has the following beneficial effects: (1) By utilizing recycled polyurethane rigid foam and fiber, the consumption of raw materials and waste generation are significantly reduced, environmental protection and sustainable development are promoted, and the effective recycling of resources is achieved.

[0047] (2) The combination of polyurethane adhesive and silane coupling agent not only enhances the bonding strength of the materials, but also makes the bonding between the recycled materials tighter through the dual mechanisms of physical force and chemical coupling, thereby improving the mechanical properties and durability of the final board.

[0048] (3) By precisely controlling the process parameters such as molding temperature, pressure and time (e.g., the preferred molding temperature is 120°C, the molding pressure is 30 Bar, and the molding time is 30 min), the stability and consistency of sheet metal forming are ensured, production efficiency is improved, and energy consumption and defective rate are reduced.

[0049] (4) The use of silane coupling agent effectively improves the compatibility between glass fiber and polyurethane bonding system, allowing the glass fiber to be better embedded and fixed in the substrate, significantly enhancing the overall structural strength and bonding stability of the board and extending the service life of the board.

[0050] (5) The use of low-cost recycled materials as the main raw materials, combined with efficient preparation technology, effectively reduced production costs, improved the market competitiveness of products, and brought significant economic benefits to the company.

[0051] Example 3 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0052] In this embodiment, the recycled polyurethane rigid foam is 30 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 3 parts, the water is 1 part, and the polyurethane binder is 100 parts.

[0053] Example 4 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0054] In this embodiment, the recycled polyurethane rigid foam is 40 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 3 parts, the water is 1 part, and the polyurethane binder is 100 parts.

[0055] Example 5 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0056] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 3 parts, the water is 1 part, and the polyurethane binder is 100 parts.

[0057] Example 6 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0058] In this embodiment, the recycled polyurethane rigid foam is 100 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 3 parts, the water is 1 part, and the polyurethane binder is 100 parts.

[0059] Example 7 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0060] In this embodiment, the recycled polyurethane rigid foam is 110 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 3 parts, the water is 1 part, and the polyurethane binder is 100 parts.

[0061] Example 8 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0062] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 20 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 3 parts, the water is 1 part, and the polyurethane binder is 100 parts.

[0063] Example 9 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0064] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 50 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 3 parts, the water is 1 part, and the polyurethane binder is 100 parts.

[0065] Example 10 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0066] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 60 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 3 parts, the water is 1 part, and the polyurethane adhesive is 100 parts.

[0067] Embodiment 11 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0068] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 5 parts, the KH-550 coupling agent is 3 parts, the water is 1 part, and the polyurethane binder is 100 parts.

[0069] Example 12 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0070] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 0 parts, the KH-550 coupling agent is 3 parts, the water is 1 part, and the polyurethane adhesive is 100 parts.

[0071] Embodiment 13 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0072] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 50 parts, the KH-550 coupling agent is 3 parts, the water is 1 part, and the polyurethane binder is 100 parts.

[0073] Embodiment 14 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0074] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 55 parts, the KH-550 coupling agent is 3 parts, the water is 1 part, and the polyurethane binder is 100 parts.

[0075] Embodiment 15 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0076] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 1 part, the water is 1 part, and the polyurethane binder is 100 parts.

[0077] Example 16 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0078] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 0 parts, the water is 1 part, and the polyurethane binder is 100 parts.

[0079] Embodiment 17 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0080] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 5 parts, the water is 1 part, and the polyurethane adhesive is 100 parts.

[0081] Embodiment 18 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0082] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 6 parts, the water is 1 part, and the polyurethane binder is 100 parts.

[0083] Embodiment 19 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0084] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 3 parts, the water is 0.1 parts, and the polyurethane binder is 100 parts.

[0085] Embodiment 20 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0086] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 3 parts, the water is 0 parts, and the polyurethane adhesive is 100 parts.

[0087] Embodiment 21 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0088] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 3 parts, the water is 2 parts, and the polyurethane binder is 100 parts.

[0089] Embodiment 22 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0090] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 3 parts, the water is 2.5 parts, and the polyurethane binder is 100 parts.

[0091] Embodiment 23 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0092] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 3 parts, the water is 1 part, and the polyurethane adhesive is 50 parts.

[0093] Embodiment 24 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0094] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 3 parts, the water is 1 part, and the polyurethane binder is 30 parts.

[0095] Embodiment 25 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0096] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 3 parts, the water is 1 part, and the polyurethane adhesive is 200 parts.

[0097] Embodiment 26 This embodiment provides a method for preparing a plate made from recycled fiberglass and polyurethane, which limits the specific ratio parameters of Example 2.

[0098] In this embodiment, the recycled polyurethane rigid foam is 80 parts, the recycled glass fiber is 35 parts, the ethyl acetate is 25 parts, the KH-550 coupling agent is 3 parts, the water is 1 part, and the polyurethane adhesive is 250 parts.

[0099] Table 1 Number of materials in Examples 3-26

[0100] The results of the bonding stability test and the plate bending strength test of the plates obtained according to the material ratios of the embodiments in Table 1 are shown in the following table.

[0101] Table 2 Test results of bonding stability and plate bending strength of products of Examples 3-26

[0102] From the test data analysis, it can be seen that in order to avoid cracking of the board body, too low bending strength and comprehensive consideration of the material input cost, the ratio of 40-100 parts of recycled polyurethane rigid foam, 20-50 parts of recycled glass fiber, 1-5 parts of silane coupling agent, 50-200 parts of adhesive, 5-50 parts of solvent, and 0.1-2 parts of water disclosed in Example 1 is the preferred ratio disclosed in this application. More preferably, 80 parts of recycled polyurethane rigid foam, 35 parts of recycled glass fiber, 25 parts of ethyl acetate, 3 parts of KH-550 coupling agent, 1 part of water, and 100 parts of polyurethane adhesive used in Example 5 of this application are the most preferred ratios of this application. This embodiment not only has good bonding stability and high board strength, but also saves more materials than other embodiments, and its comprehensive effect is the most outstanding.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A plate made of recycled glass fiber reinforced plastics and polyurethane, characterized in that: The method comprises 40-100 parts of recycled polyurethane rigid foam, 20-50 parts of recycled glass fiber, 1-5 parts of silane coupling agent, 50-200 parts of adhesive, 5-50 parts of solvent and 0.1-2 parts of water.

2. The plate material according to claim 1, characterized in that The recycled polyurethane rigid foam is in powder form, and its particle size is ≤10 mm.

3. The plate material according to claim 1, characterized in that: The length of the recycled glass fiber is between 5-10 mm.

4. The sheet material according to claim 1, characterized in that The silane coupling agent includes one or more of KH-550, KH-560, KH-570, Z-6011, Z-6040, KBM-903, and KBM-403.

5. The plate material according to claim 1, characterized in that The adhesive is a polyurethane adhesive.

6. The sheet material according to claim 1, characterized in that The solvent includes one or more of acetone, dichloromethane, toluene, butanone, cyclohexanone and ethyl acetate.

7. A method for preparing the plate material according to claims 1 to 6, comprising the steps of: S1: Mix the polyurethane adhesive, solvent, water and silane coupling agent in corresponding proportions, stir evenly and use as an adhesive; S2: Mix the recycled glass fiber and the recycled polyurethane rigid foam according to a certain proportion, and pre-mix them so that the fiber can be evenly distributed in the foam to form recycled material; S3: Pour the prepared adhesive into the recycled material mixed in step S2, and stir for 3-5 minutes until it is evenly mixed; S4: Pour the material of step S4 into the mold according to the weight of the corresponding density pair, and perform molding under the conditions of molding temperature of 100°C-140°C, molding pressure of 20-50Bar, and molding time of 30-60min to obtain a molded wood board.

8. The preparation method according to claim 7, characterized in that: The molding temperature is 120°C.

9. The preparation method according to claim 7, characterized in that: The molding pressure is 30Bar.

10. The preparation method according to claim 7, characterized in that: The molding time is 30 minutes.

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