Composite template and preparation method thereof

Abstract

The application provides a method for preparing a composite template by using waste glass fiber leaves, and a composite template obtained by the method. The composite template has the structure of an outermost skin layer / a peripheral reinforcing layer / a central core material layer / a peripheral reinforcing layer / an outermost skin layer, and each layer is obtained by extrusion molding using a material recovered from the waste glass fiber leaves. The method of the application can realize the resource recycling of the waste glass fiber leaves, and the prepared high-strength composite template has excellent performance and a wide range of application scenarios.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of recycling and reusing waste glass fiber wind power blades, in particular to a method for preparing a high-strength composite mold plate from waste glass fiber blades and a high-strength composite mold plate prepared by the method. BACKGROUND

[0002] As a green energy source, how to achieve green and harmless in the whole life cycle has always been the goal of the wind power industry. The service life of a wind turbine is generally about 25 years. The first generation of wind turbines was introduced in the 1990s, and by now, some wind power blades have reached the end of their lives.

[0003] The main material of the wind power blade has the characteristics of light weight, high strength, corrosion resistance, etc., but at the same time, it also increases the difficulty of its later recycling and reuse. The traditional way not only causes pollution and affects the ecological environment, but also wastes a lot of resources, which is an undesirable recycling method. How to realize the resource recycling of waste wind power blades and expand the application scenarios of waste wind power blades is of great significance to the development of the wind power industry. SUMMARY

[0004] The present application provides a method for preparing a high-strength composite mold plate from waste glass fiber blades, which realizes the resource recycling of waste glass fiber blades, and the prepared composite mold plate has light weight, high strength, good corrosion and waterproof performance, good application scenarios and great popularization value.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] According to the first aspect of the present application, a method for preparing a composite mold plate from waste glass fiber blades is provided, which comprises the following steps:

[0007] (1) cutting the blade into sections, extracting and separating glass fiber reinforced resin, balsa wood and PVC foam;

[0008] (2) crushing, part of the glass fiber reinforced resin is crushed into 6-15mm material A, part of the glass fiber reinforced resin is crushed into 2-6mm material B, and part of the glass fiber reinforced resin is crushed into 30-100 mesh material C; the balsa wood is crushed into 50-90 mesh material D; the PVC foam is crushed into 80-150 mesh material E;

[0009] (3) material A is subjected to a degradation reaction in the presence of catalyst I and solvent I, filtered and dried to obtain material F, which contains long glass fibers; material B is subjected to a degradation reaction in the presence of catalyst II and solvent II, filtered and dried to obtain material G, which contains short glass fibers;

[0010] (4) mixing material C, material D, material E, thermoplastic resin, foaming agent, compatibilizer and lubricant to obtain a mixture M;

[0011] (5) mixing material C, material G, thermoplastic resin, calcium carbonate, compatibilizer and lubricant to obtain a mixture N;

[0012] (6) mixing material C, thermoplastic resin, compatibilizer, antioxidant, light stabilizer and lubricant to obtain a mixture K;

[0013] (7) the composite template is a multi-layer plate having the structure of outermost skin layer / peripheral reinforcing layer / central core material layer / peripheral reinforcing layer / outermost skin layer, and is prepared by co-extrusion of different extruders, wherein the mixture M is extruded by an extruder to prepare the central core material layer; the mixture N and material F are extruded by an extruder to prepare the peripheral reinforcing layer, wherein the material F is added to the peripheral reinforcing layer by a side feeding mode to realize uniform mixing and extrusion with the mixture N; the mixture K is extruded by an extruder to prepare the outermost skin layer.

[0014] Preferably, in step (1), the length of the cut blade section is 1-2 m, and the width is 0.5-1 m.

[0015] Preferably, in step (1), the extraction separation refers to positioning the positions of the glass fiber reinforced resin, basswood and PVC foam in the blade section by a detection instrument, and then extracting the basswood and PVC foam in the blade section by a fine cutting machine, so as to realize the separation of the glass fiber reinforced resin, basswood and PVC foam in the blade section.

[0016] In step (2), the crushing can use a conventional crushing method in the art, such as a crusher.

[0017] Preferably, in step (3), the catalyst I and the catalyst II are independently potassium tert-butoxide or phenyllithium.

[0018] Preferably, the solvent I and the solvent II are independently selected from one or more of 1-butyl-3-methylimidazolium acetate, 1-hexyl-3-methylimidazolium acetate and 1-octyl-3-methylimidazolium acetate.

[0019] Preferably, in step (3), the mass-volume ratio of the material A, the catalyst I and the solvent I is 100 g: 3-10 g: 50-300 ml; the mass-volume ratio of the material B, the catalyst II and the solvent II is 100 g: 0.5-5 g: 50-150 ml.

[0020] Preferably, in step (3), the reaction time of the material A is 80-200 min, the temperature is 120-200℃, and the stirring speed is 10-30 rpm.

[0021] Preferably, in step (3), the reaction time of material B is 30-70 min, the temperature is 60-150℃, and the stirring speed is 10-30 rpm.

[0022] Preferably, in steps (4)-(6), the thermoplastic resin is independently PP or PE.

[0023] Preferably, in steps (4)-(6), the foaming agent is independently butane or n-pentane.

[0024] Preferably, in steps (4)-(6), the compatibilizer is independently maleic anhydride grafted polypropylene or maleic anhydride grafted polyethylene.

[0025] Preferably, in steps (4)-(6), the lubricant is independently 12-hydroxystearic acid and / or paraffin wax.

[0026] Preferably, in steps (4)-(6), the antioxidant is one or more selected from Irganox 1076, Irganox 1010, DLTP, and DSTP.

[0027] Preferably, in steps (4)-(6), the light stabilizer is one or more selected from TiO2, ZnO, and UV-326.

[0028] Preferably, in step (4), the mass ratio of material C, material D, material E, thermoplastic resin, foaming agent, compatibilizer, and lubricant is 10-20:15-30:15-30:40:0.3-0.5:1-3:1-4.

[0029] Preferably, in step (5), the mass ratio of material C, material G, thermoplastic resin, calcium carbonate, compatibilizer, and lubricant is 10-15:20-35:40:10-15:1-3:3-8.

[0030] Preferably, in step (6), the mass ratio of material C, thermoplastic resin, compatibilizer, antioxidant, light stabilizer, and lubricant is 20-35:70:1-3:0.5-1:0.2-0.6:5-8.

[0031] Preferably, in steps (4)-(6), the different raw materials are mixed by a high-speed mixer, the high-speed mixer is stopped when the temperature is raised to 100-108℃.

[0032] Preferably, in step (7), the extrusion parameters of the central core material layer are barrel zone temperature 160-180℃, co-flow core temperature 150-160℃, and mold temperature 165-180℃.

[0033] Preferably, in step (7), the extrusion parameters of the outer peripheral reinforcing layer are a barrel zone temperature of 170-200 DEG C, a co-flow core temperature of 155-170 DEG C, and a die temperature of 170-195 DEG C.

[0034] Preferably, in step (7), the outer peripheral reinforcing layer is added in an amount of 10-20% relative to the total weight of the mixture N.

[0035] Preferably, in step (7), the extrusion parameters of the outermost skin layer are a barrel zone temperature of 165-195 DEG C, a co-flow core temperature of 155-165 DEG C, and a die temperature of 170-185 DEG C.

[0036] The outermost skin layer / outer peripheral reinforcing layer / central core material layer / outer peripheral reinforcing layer / outermost skin layer are 2+ / -0.5 mm, 2.5+ / -0.5 mm, 3+ / -0.5 mm, 2.5+ / -0.5 mm, and 2+ / -0.5 mm, respectively.

[0037] According to a second aspect of the present application, a composite template is provided, which is prepared by the method for preparing a composite template using waste glass fiber blades according to the present application.

[0038] Compared with the prior art, the present application has the following characteristics and beneficial effects:

[0039] The method of the present application can realize the resource recycling of waste glass fiber blades, and the prepared high-strength composite template has excellent performance and a wide range of application scenarios. In the present application, the glass fiber reinforced resin, basswood, and PVC foam in the blade fragments are separated by fine extraction and applied to different layers of the high-strength composite template, which not only makes the best use of resources, but also takes advantage of the effects and advantages of different materials; the glass fiber reinforced resin is broken into different particle sizes and used in a hierarchical manner, which can improve the mechanical properties of the composite template as much as possible and reduce the weight of the template; the materials A and B are reacted with a catalyst and a solvent, and by controlling the reaction reagents and conditions, most of the resin in the glass fiber reinforced resin can be removed, further enhancing the strength of the composite template. At the same time, the method of the present application has a lower requirement for the purity of glass fiber, so the consumption of reaction reagents is less, and the reaction conditions are more mild. DETAILED DESCRIPTION

[0040] In order to make the technical means, innovative features, purposes and effects of the present application easy to understand, the present application is further described below.

[0041] The embodiments described herein are illustrative and exemplary of the present application and are not intended to limit the present application to the embodiments described herein. Other embodiments will readily occur to those skilled in the art and are included within the purview of the present application as defined by the appended claims and their equivalents. In addition, unless otherwise indicated, the descriptions of the embodiments are not limited to the specific embodiments described herein. In addition, it is intended that the various embodiments described herein can be used in combination with each other.

[0042] Example 1

[0043] (1) The leaves are cut into leaf segments with a length of 1.5 m and a width of 1 m. The glass fiber reinforced resin, the balsa wood and the PVC foam are separated by a detection instrument to locate fine cutting and extraction;

[0044] (2) The glass fiber reinforced resin is broken into 6-15 mm material A, 2-6 mm material B and 30-100 mesh material C. The balsa wood is broken into 50-90 mesh material D. The PVC foam is broken into 80-150 mesh material E;

[0045] (3) The material A is subjected to a degradation reaction in the presence of a catalyst (potassium tert-butoxide) and a solvent (1-butyl-3-methylimidazolium acetate). After filtration and drying, material F is obtained. The mass-volume ratio of material A, catalyst and solvent is 100 g:8 g:230 ml. The reaction time is 140 min, the temperature is 150°C, and the stirring speed is 25 rpm;

[0046] (4) The material B is subjected to a degradation reaction in the presence of a catalyst (potassium tert-butoxide) and a solvent (1-butyl-3-methylimidazolium acetate and 1-octyl-3-methylimidazolium acetate are compounded, and the volume ratio of the two is 2:1). After filtration and drying, material G is obtained. The mass-volume ratio of material B, catalyst and solvent is 100 g:2 g:100 ml. The reaction time of material B is 55 min, the temperature is 130°C, and the stirring speed is 20 rpm;

[0047] (5) The material C, the material D, the material E, the thermoplastic resin (PP, PP1024 plastic), the foaming agent (butane), the compatibilizer (maleic anhydride grafted polypropylene), and the lubricant (12-hydroxystearic acid and paraffin wax, mass ratio 2:1) are mixed to obtain a mixture M. The mass ratio of material C, material D, material E, thermoplastic resin, foaming agent, compatibilizer and lubricant is 10:25:20:40:0.4:2:3. Different raw materials are mixed by a high-speed mixer at a rotation speed of 1500 r / min. The high-speed mixer is stopped when the temperature reaches 105°C;

[0048] (6) Material C, material G, thermoplastic resin (polypropylene, PP1024 plastic), calcium carbonate, compatibilizer (maleic anhydride grafted polypropylene), lubricant (12-hydroxystearic acid and paraffin wax, mass ratio 1.5:1) are mixed to obtain a mixture N; the mass ratio of material C, material G, thermoplastic resin, calcium carbonate, compatibilizer and lubricant is 10:30:40:15:2:6; different raw materials are mixed by a high-speed mixer, the high-speed mixer is stopped when the temperature of the high-speed mixer is raised to 105°C at a rotation speed of 1350 r / min;

[0049] (7) Material C, thermoplastic resin (PE, HDPE Taitsu 8001), compatibilizer (maleic anhydride grafted polyethylene), antioxidant (Irganox 1076), light stabilizer (TiO2), lubricant (12-hydroxystearic acid and paraffin wax, mass ratio 1:1) are mixed to obtain a mixture K; the mass ratio of material C, thermoplastic resin, compatibilizer, antioxidant, light stabilizer and lubricant is 25:70:3:0.8:0.5:7; different raw materials are mixed by a high-speed mixer, the high-speed mixer is stopped when the temperature of the high-speed mixer is raised to 105°C at a rotation speed of 1250 r / min;

[0050] (8) The high-strength composite formwork is a multi-layer board, which has the structure of outermost skin layer / peripheral reinforcing layer / central core material layer / peripheral reinforcing layer / outermost skin layer, and is prepared by co-extrusion of different extruders, wherein the mixture M is used to prepare the central core material layer by extrusion; the mixture N and material F are used to prepare the peripheral reinforcing layer by extrusion, wherein the material F is added to the peripheral reinforcing layer by a side feeding method to realize uniform mixing and extrusion with the mixture N, and the addition amount of the material F is 18% relative to the total mass of the mixture N; the mixture K is used to prepare the outermost skin layer by extrusion. The extrusion parameters of the central core material layer are barrel zone temperature 170-180°C, converging core temperature 160°C and mold temperature 180°C; the extrusion parameters of the peripheral reinforcing layer are barrel zone temperature 175-195°C, converging core temperature 165°C and mold temperature 185°C; the extrusion parameters of the outermost skin layer are barrel zone temperature 175-190°C, converging core temperature 160°C and mold temperature 180°C. The outermost skin layer / peripheral reinforcing layer / central core material layer / peripheral reinforcing layer / outermost skin layer are 2 mm, 2.5 mm, 3 mm, 2.5 mm and 2 mm in sequence.

[0051] Example 2

[0052] (1) The leaves are cut into leaf segments with a length of 2 m and a width of 1 m, and the glass fiber reinforced resin, balsa wood and PVC foam are separated by a specific detection instrument;

[0053] (2) crushing, crushing part of the glass fiber reinforced resin into 6-15mm material A, part of the glass fiber reinforced resin into 2-6mm material B, part of the glass fiber reinforced resin into 30-100 mesh material C; crushing Bashamu into 50-90 mesh material D; crushing PVC foam into 80-150 mesh material E;

[0054] (3) material A is subjected to degradation reaction in the presence of catalyst (phenyl lithium) and solvent (1-hexyl-3-methyl imidazole acetate), filtration and drying to obtain material F; wherein the mass-volume ratio of material A, catalyst and solvent is 100g:3g:150ml; the reaction time is 100min, the temperature is 180℃, and the stirring speed is 30rpm;

[0055] (4) material B is subjected to degradation reaction in the presence of catalyst (phenyl lithium) and solvent (1-octyl-3-methyl imidazole acetate), filtration and drying to obtain material G; the mass-volume ratio of material B, catalyst and solvent is 100g:4g:120ml; the reaction time of material B is 50min, the temperature is 110℃, and the stirring speed is 27rpm;

[0056] (5) mixing material C, material D, material E, thermoplastic resin (PP) with foaming agent (n-pentane), compatible agent (maleic anhydride grafted polypropylene), lubricant (12-hydroxy stearic acid and paraffin wax, mass ratio is 1:1) to obtain mixed material M; the mass ratio of material C, material D, material E, thermoplastic resin, foaming agent, compatible agent and lubricant is 15:15:30:40:0.3:2:2; different raw materials are mixed by high-speed mixer, the high-speed mixer is stopped when the temperature of high-speed mixer reaches 103℃ with the rotation speed of 1400r / min;

[0057] (6) mixing material C, material G, thermoplastic resin (PE), calcium carbonate with compatible agent (maleic anhydride grafted polyethylene), lubricant (12-hydroxy stearic acid and paraffin wax, mass ratio is 1:1) to obtain mixed material N; the mass ratio of material C, material G, thermoplastic resin, calcium carbonate, compatible agent and lubricant is 12:28:40:12:3:5; different raw materials are mixed by high-speed mixer, the high-speed mixer is stopped when the temperature of high-speed mixer reaches 102℃ with the rotation speed of 1350r / min;

[0058] (7) mixing material C, thermoplastic resin (PP) with compatible agent (maleic anhydride grafted polypropylene), antioxidant (Irganox1010), light stabilizer (ZnO), lubricant (12-hydroxy stearic acid and paraffin wax, mass ratio is 1:2) to obtain mixed material K; the mass ratio of material C, thermoplastic resin, compatible agent, antioxidant, light stabilizer and lubricant is 28:70:2:0.5:0.3:5; different raw materials are mixed by high-speed mixer, the high-speed mixer is stopped when the temperature of high-speed mixer reaches 108℃ with the rotation speed of 1400r / min.

[0059] (8) The high-strength composite template is a multi-layer board having the structure of outermost skin layer / peripheral reinforcing layer / central core material layer / peripheral reinforcing layer / outermost skin layer, and is prepared by co-extrusion through different extruders, wherein the mixed material M is used to prepare the central core material layer; the mixed material N and the material F are used to prepare the peripheral reinforcing layer by extrusion through an extruder, the material F is added to the peripheral reinforcing layer by a side feeding mode to realize uniform mixing and extrusion with the mixed material N, and the addition amount of the material F is 13% relative to the total mass of the mixed material N; and the mixed material K is used to prepare the outermost skin layer by extrusion through an extruder. The extrusion parameters of the central core material layer are barrel zone temperature 165-175°C, converging core temperature 155°C, and mold temperature 170°C; the extrusion parameters of the peripheral reinforcing layer are barrel zone temperature 180-200°C, converging core temperature 160°C, and mold temperature 190°C; and the extrusion parameters of the outermost skin layer are barrel zone temperature 170-185°C, converging core temperature 160°C, and mold temperature 175°C. The outermost skin layer / peripheral reinforcing layer / central core material layer / peripheral reinforcing layer / outermost skin layer are 2 mm, 2.5 mm, 3 mm, 2.5 mm, and 2 mm, respectively.

[0060] Example 3

[0061] (1) The blade is cut into a blade segment with a length of 1 m and a width of 0.7 m, and the glass fiber reinforced resin, basswood, and PVC foam are separated by positioning and fine extraction through a specific detection instrument;

[0062] (2) The glass fiber reinforced resin is broken into 6-15 mm material A, 2-6 mm material B, and 30-100 mesh material C; the basswood is broken into 50-90 mesh material D; and the PVC foam is broken into 80-150 mesh material E;

[0063] (3) The material A is subjected to a degradation reaction in the presence of a catalyst (potassium tert-butoxide) and a solvent (1-hexyl-3-methylimidazole acetate and 1-octyl-3-methylimidazole acetate are compounded in a volume ratio of 1:1), is filtered, and is dried to obtain material F; the mass-volume ratio of the material A, the catalyst, and the solvent is 100 g:5 g:270 ml; the reaction time is 180 min, the temperature is 160°C, and the stirring speed is 18 rpm;

[0064] (4) The material B is subjected to a degradation reaction in the presence of a catalyst (phenyllithium) and a solvent (1-hexyl-3-methylimidazole acetate), is filtered, and is dried to obtain material G; wherein the mass-volume ratio of the material B, the catalyst, and the solvent is 100 g:2.5 g:80 ml; the reaction time of the material B is 70 min, the temperature is 80°C, and the stirring speed is 15 rpm;

[0065] (5) material C, material D, material E, thermoplastic resin (PE) and foaming agent (n-pentane), compatibilizer (maleic anhydride grafted polyethylene), lubricant (12-hydroxystearic acid and paraffin wax, mass ratio 2:1) are mixed to obtain a mixture M; wherein the mass ratio of material C, material D, material E, thermoplastic resin, foaming agent, compatibilizer, lubricant is 18:22:15:40:0.5:3:4; different raw materials are mixed by high-speed mixer, the high-speed mixer is stopped when the temperature of the high-speed mixer is raised to 108℃ at a rotation speed of 1200r / min;

[0066] (6) material C, material G, thermoplastic resin (PE), calcium carbonate and compatibilizer (maleic anhydride grafted polyethylene), lubricant (12-hydroxystearic acid and paraffin wax, mass ratio 1:1) are mixed to obtain a mixture N; wherein the mass ratio of material C, material G, thermoplastic resin, calcium carbonate, compatibilizer, lubricant is 15:25:40:10:3:8; different raw materials are mixed by high-speed mixer, the high-speed mixer is stopped when the temperature of the high-speed mixer is raised to 102℃ at a rotation speed of 1200r / min;

[0067] (7) material C, thermoplastic resin (PP) and compatibilizer (maleic anhydride grafted polypropylene), antioxidant (Irganox1010 and DLTP compound, compound volume ratio 1:1), light stabilizer (UV-326), lubricant (12-hydroxystearic acid and paraffin wax, mass ratio 1:1) are mixed to obtain a mixture K; wherein the mass ratio of material C, thermoplastic resin, compatibilizer, antioxidant, light stabilizer, lubricant is 32:70:2:1:0.2:6; different raw materials are mixed by high-speed mixer, the high-speed mixer is stopped when the temperature of the high-speed mixer is raised to 100℃ at a rotation speed of 1200r / min;

[0068] (8) The high-strength composite template is a multi-layer plate, which has the structure of outermost skin layer / peripheral reinforcing layer / central core material layer / peripheral reinforcing layer / outermost skin layer, and is prepared by co-extrusion through different extruders, wherein the mixed material M is used to prepare the central core material layer by extrusion through an extruder; the mixed material N and the material F are used to prepare the peripheral reinforcing layer by extrusion through an extruder, wherein the material F is added to the peripheral reinforcing layer by a side feeding mode to realize uniform mixing and extrusion with the mixed material N, and the addition amount of the material F is 15% relative to the total mass of the mixed material N; the mixed material K is used to prepare the outermost skin layer by extrusion through an extruder, and the high-strength composite template is co-extruded through different extruders. The extrusion parameters of the central core material layer are that the barrel zone temperature is 170-180°C, the converging core temperature is 150°C, and the die temperature is 170°C; the extrusion parameters of the peripheral reinforcing layer are that the barrel zone temperature is 170-185°C, the converging core temperature is 155°C, and the die temperature is 180°C; and the extrusion parameters of the outermost skin layer are that the barrel zone temperature is 165-185°C, the converging core temperature is 155°C, and the die temperature is 175°C. The outermost skin layer / peripheral reinforcing layer / central core material layer / peripheral reinforcing layer / outermost skin layer are 2 mm, 2.5 mm, 3 mm, 2.5 mm and 2 mm in sequence.

[0069] Comparative Example 1

[0070] The method of Example 1 is implemented, except that steps (3) and (4) are cancelled, the material F in the method process is replaced with the material A, and the material G is replaced with the material B.

[0071] Comparative Example 2

[0072] The method of Example 1 is implemented, except that in step (2), the glass fiber reinforced resin is crushed into the material B of 2-6 mm and the material C of 30-100 mesh; step (3) is cancelled; and in step (8), the material F is replaced with the material G.

[0073] Comparative Example 3

[0074] The method of Example 1 is implemented, except that in step (2), the glass fiber reinforced resin is crushed into the material C of 30-100 mesh; steps (3) and (4) are cancelled; in step (6), the material G is replaced with the material C; and in step (8), the material F is replaced with the material C.

[0075] Test Example

[0076] The composite templates prepared in Examples 1-3 and Comparative Examples 1-3 are tested for performance, and the test indexes include the bending strength, the bending elastic modulus and the simply supported beam unnotched impact strength.

[0077] 1. The bending strength and bending elastic modulus of the composite templates prepared from Examples 1-3 and Comparative Examples 1-3 were tested according to the method of standard GB / T 1449-2005 "Fiber Reinforced Plastics Bending Properties Test Method", and the results are shown in Table 1.

[0078] 2. The simply supported beam unnotched impact strength of the composite templates prepared from Examples 1-3 and Comparative Examples 1-3 was tested according to the method of standard GB / T 1451-2005 "Fiber Reinforced Plastics Simply Supported Beam Impact Toughness Test Method", and the results are shown in Table 1.

[0079] Table 1

[0080]

[0081] As can be seen from the results in Table 1, the method described in the present application can successfully realize the resource recycling of waste glass fiber blades, the composite templates prepared have high strength, excellent physical and mechanical properties, and good corrosion and waterproof performance, and have a wide range of application scenarios and great popularization value.

[0082] The preferred embodiments of the present application are described in detail above, but the present application is not limited thereto. Within the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be considered as disclosed by the present application, and all fall within the protection scope of the present application.

Claims

1. A method for preparing a composite mold plate by using waste glass fiber blade, the method comprising the following steps: (1) cutting the blade into segments, and extracting and separating glass fiber reinforced resin, balsa wood and PVC foam; (2) crushing, wherein the glass fiber reinforced resin is crushed into 6-15 mm material A, 2-6 mm material B and 30-100 mesh material C, the balsa wood is crushed into 50-90 mesh material D, and the PVC foam is crushed into 80-150 mesh material E; (3) performing a degradation reaction on the material A in the presence of catalyst I and solvent I, filtering and drying to obtain material F containing long glass fibers, and performing a degradation reaction on the material B in the presence of catalyst II and solvent II, filtering and drying to obtain material G containing short glass fibers; (4) mixing the material C, the material D, the material E, a thermoplastic resin, a foaming agent, a compatibilizer and a lubricant to obtain a mixture M; (5) mixing the material C, the material G, the thermoplastic resin, calcium carbonate, the compatibilizer and the lubricant to obtain a mixture N; (6) mixing the material C, the thermoplastic resin, the compatibilizer, an antioxidant, a light stabilizer and the lubricant to obtain a mixture K; and (7) the composite mold plate is a multi-layer plate having a structure of outermost skin layer / peripheral reinforcing layer / central core material layer / peripheral reinforcing layer / outermost skin layer, and is prepared by co-extrusion through different extruders, wherein the mixture M is extruded through an extruder to prepare the central core material layer, the mixture N and the material F are extruded through an extruder to prepare the peripheral reinforcing layer, wherein the material F is added to the peripheral reinforcing layer by a side feeding mode to realize uniform mixing and extrusion with the mixture N, and the mixture K is extruded through an extruder to prepare the outermost skin layer. 2.The method for preparing a composite mold plate by using waste glass fiber blade according to claim 1, wherein, in step (1), the length of the blade cut into segments is 1-2 m, and the width is 0.5-1 m; and / or in step (1), the extraction and separation refers to positioning the positions of the glass fiber reinforced resin, the balsa wood and the PVC foam in the blade segment by a detection instrument, and then extracting the balsa wood and the PVC foam in the blade segment by a fine cutting machine, so as to realize the separation of the glass fiber reinforced resin, the balsa wood and the PVC foam in the blade segment; and / or in step (3), the catalyst I and the catalyst II are independently potassium tert-butoxide or phenyllithium; and / or the solvent I and the solvent II are independently selected from one or more of 1-butyl-3-methylimidazolium acetate, 1-hexyl-3-methylimidazolium acetate and 1-octyl-3-methylimidazolium acetate. 3.The method for preparing a composite mold plate by using waste glass fiber blade according to claim 1 or 2, wherein, in step (3), the mass-volume ratio of the material A, the catalyst I and the solvent I is 100 g∶3-10 g∶50-300 ml; and / or the mass-volume ratio of the material B, the catalyst II and the solvent II is 100 g∶0.5-5 g∶50-150 ml; and / or ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ In step (3), the reaction time of material A is 80-200 min, the temperature is 120-200℃, and the stirring speed is 10-30 rpm; and / or In step (3), the reaction time of material B is 30-70 min, the temperature is 60-150℃, and the stirring speed is 10-30 rpm.

4. The method for preparing a composite template with waste glass fiber blades according to any one of claims 1 to 3, wherein, In steps (4)-(6), the thermoplastic resin is independently PP or PE; and / or In steps (4)-(6), the foaming agent is independently butane or n-pentane; and / or In steps (4)-(6), the compatibilizer is independently maleic anhydride grafted polypropylene or maleic anhydride grafted polyethylene.

5. The method for preparing a composite template with waste glass fiber blades according to any one of claims 1 to 4, wherein, In steps (4)-(6), the lubricant is independently 12-hydroxystearic acid and / or paraffin wax; and / or In steps (4)-(6), the antioxidant is one or more selected from Irganox 1076, Irganox 1010, DLTP and DSTP; and / or In steps (4)-(6), the light stabilizer is one or more selected from TiO2, ZnO and UV-326.

6. The method for preparing a composite template with waste glass fiber blades according to any one of claims 1 to 5, wherein, In step (4), the mass ratio of material C, material D, material E, thermoplastic resin, foaming agent, compatibilizer, and lubricant is 10-20:15-30:15-30:40:0.3-0.5:1-3:1-4; and / or In step (5), the mass ratio of material C, material G, thermoplastic resin, calcium carbonate, compatibilizer, and lubricant is 10-15:20-35:40:10-15:1-3:3-8; and / or In step (6), the mass ratio of material C, thermoplastic resin, compatibilizer, antioxidant, light stabilizer, and lubricant is 20-35:70:1-3:0.5-1:0.2-0.6:5-8.

7. The method for preparing a composite template with waste glass fiber blades according to any one of claims 1 to 6, wherein, In steps (4)-(6), each raw material is mixed by a high-speed mixer, the high-speed mixer is stopped when the temperature is raised to 100-108℃ at a rotation speed of 1200-1500 r / min.

8. The method for preparing a composite template with waste glass fiber blades according to any one of claims 1 to 7, wherein, In step (7), the extrusion parameters of the central core material layer are a barrel zone temperature of 160-180℃, a converging core temperature of 150-160℃, and a mold temperature of 165-180℃; and / or In step (7), the extrusion parameters of the peripheral reinforcing layer are a barrel zone temperature of 170-200℃, a converging core temperature of 155-170℃, and a mold temperature of 170-195℃; and / or In step (7), the amount of the material F added is 10-20% relative to the total weight of the mixture N; and / or In step (7), the extrusion parameters of the outermost skin layer are a barrel zone temperature of 165-195°C, a converging core temperature of 155-165°C, and a die temperature of 170-185°C. 9.The method of claim 1 to 8, wherein the composite formwork is prepared by using waste glass fiber leaves, and the method comprises the following steps: (1) preparing a mixture N by mixing a binder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, a curing catalyst, a curing accelerator, a curing retarder, a curing agent, ​ ​

Images