A high-reflective floating body and its manufacturing method and application

Abstract

The present invention relates to the field of photovoltaic floating body technology, specifically a highly reflective floating body and its manufacturing method and application. The floating body has a double-layer blow-molded main body structure, wherein the outer layer components include: high-density polyethylene, linear polyethylene and reflective filling material; the inner layer components include high-density polyethylene; the ultraviolet light reflectivity of the highly reflective floating body is above 50%. The scheme of the present invention adopts double-layer blow molding and differentiated material design for the inner and outer layers. The outer layer mainly improves the surface reflectivity and toughness, and the inner layer provides a certain strength. At the same time, it can also increase the light barrier, thereby improving the reflectivity of the floating body, and the ultraviolet light reflectivity is above 50%, thereby effectively improving the power generation efficiency of double-glass component floating power stations, so that the competitiveness of the product is further improved. In addition, the materials used are all conventional raw materials, the technical process is mature, the processing is convenient, and it is conducive to product implementation.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic floating bodies, and more particularly to a highly reflective floating body and a manufacturing method and application thereof. Background Art

[0002] In the current floating power station on the water surface, the photovoltaic float is used as a supporting structure to carry system components, cables, junction boxes and related equipment. Its material is large hollow blow molding grade high-density polyethylene, and it is an integrated structure processed by a single-layer extrusion blow molding machine. The photovoltaic float is composed of structural elements such as connecting ears, blow molding holes, supporting top supports, support frame mounting plates and surface features. Figure 1 As shown, 1 is the floating body ear, 2 is the blow-molded hole, 3 is the support frame mounting plate, and 4 is the surface feature.

[0003] At present, most of the methods used at home and abroad are to increase the tracking rotation axis so that the single-glass module is continuously at the optimal local inclination angle to improve the conversion efficiency of the photovoltaic system of the floating power station on the water surface; Figure 2 As shown, the photovoltaic module 1 is additionally provided with a plurality of rotating shafts 2. Although the use of the tracking system in some photovoltaic projects can increase the power generation efficiency by 10% to 20%, the cost of the bracket is greatly increased, and the cost of system operation and subsequent maintenance is also increased accordingly, which limits the promotion of this installation method to a certain extent. At the same time, this tracking system is of no benefit to double-glass modules (single-glass modules have a single glass on the front and can only generate electricity from the front light; double-glass modules have two glass on the front and back, and can generate electricity from both the front and back lights).

[0004] It can be seen that the existing water surface photovoltaic system components are limited by the limited receiving area of ​​the components due to the certain lighting time and light intensity, low power generation conversion efficiency, high overall system cost, and a long static investment payback period for the power station. Summary of the invention

[0005] In view of this, the present invention provides a highly reflective floating body and a manufacturing method and application thereof. The floating body has the characteristics of high reflectivity and high strength, and can effectively improve the power generation efficiency of the double-glass component floating power station used.

[0006] The present invention provides a highly reflective floating body, which has a double-layer blow-molded main body structure, wherein the outer layer components include: high-density polyethylene, linear polyethylene and reflective filling material; the inner layer components include high-density polyethylene;

[0007] The ultraviolet light reflectivity of the highly reflective floating body is above 50%.

[0008] In an embodiment of the present invention, the reflective filling material is a hollow glass microsphere material.

[0009] In an embodiment of the present invention, the hollow glass microsphere material has a silane-modified structure, and the mass ratio of high-density polyethylene, linear polyethylene, and hollow glass microsphere material in the outer layer component is 50-70:10-30:1-20.

[0010] In an embodiment of the present invention, the inner layer component further comprises a silver masterbatch and an infrared blocking agent; the mass ratio of high-density polyethylene, silver masterbatch and infrared blocking agent in the inner layer component is 80-95:1-5:1-5.

[0011] In an embodiment of the present invention, the outer layer has a wall thickness of 0.2 to 1 mm, and the inner layer has a wall thickness of 0.5 to 2 mm.

[0012] In an embodiment of the present invention, the visible light reflectivity of the highly reflective floating body is above 50%, preferably greater than 80%.

[0013] The present invention provides a method for making a highly reflective floating body as described above, comprising: mixing and granulating the outer layer component raw materials and the inner layer component raw materials respectively, and then adding them into a blow molding device, using a floating body mold and a double-layer co-extrusion blow molding method to process and make the highly reflective floating body.

[0014] In an embodiment of the present invention, the reflective filling material in the outer layer component is a hollow glass microsphere material, which is obtained by the following operation: hollow glass microspheres with an average particle size of 10 to 120 μm are mixed with a silane coupling agent at a high speed and then dried; the mass proportion of the silane coupling agent is preferably 10% to 40%.

[0015] In an embodiment of the present invention, the outer layer component further comprises an antioxidant, a light stabilizer and an anti-impact agent, and the mixing and granulation of the outer layer component raw materials comprises: mixing high-density polyethylene, linear polyethylene, reflective filler material, antioxidant, light stabilizer and anti-impact agent, and then performing multi-segment extrusion granulation at a temperature of 160 to 210° C.;

[0016] The blow ratio in the double-layer co-extrusion blow molding method is preferably 1.5 to 1.9.

[0017] The present invention provides the use of the highly reflective floating body as described above in a floating power station.

[0018] The material used for existing water surface photovoltaic floats is high-density polyethylene. Due to the limitations of the material's own performance, the reflectivity of the float surface is low and it is impossible to increase the effective illumination area on the back of the photovoltaic double-glass module.

[0019] Compared with the prior art, the present invention provides a highly reflective floating body for water surface photovoltaics, which has two inner and outer material layers made by double-layer blow molding, wherein the outer layer components include: high-density polyethylene, linear polyethylene and reflective filling material; the inner layer components are mainly high-density polyethylene. The scheme of the present invention adopts double-layer blow molding and differentiated material formula design for the inner and outer layers. The outer layer mainly improves the surface reflectivity and toughness, and the inner layer provides a certain strength and can also increase the light barrier, thereby improving the reflectivity of the floating body, and the ultraviolet light reflectivity is above 50%, thereby effectively improving the power generation efficiency of double-glass component floating power stations, and further improving the competitiveness of the product.

[0020] In addition, the materials used are all conventional raw materials, with mature technology and convenient processing, which is conducive to product implementation. The use of the highly reflective floating body described in this solution, combined with the floating power station of double-glass components, is conducive to solving the problem of low efficiency of photovoltaic power generation, effectively increasing power generation efficiency, and reducing the cost recovery period of investors. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the floating body;

[0022] Figure 2 A schematic diagram of a structure for adding a rotating shaft to an existing photovoltaic module;

[0023] Figure 3 It is a schematic cross-sectional diagram of the double-layer structure of the highly reflective floating body described in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0025] The present invention provides a highly reflective floating body, which has a double-layer blow-molded main body structure, wherein the outer layer components include: high-density polyethylene, linear polyethylene and reflective filling material; the inner layer components include high-density polyethylene;

[0026] The ultraviolet light reflectivity of the highly reflective floating body is above 50%.

[0027] The present invention provides a floating body with high reflectivity and high strength, which can be applied to water surface photovoltaics to effectively improve the power generation efficiency of floating power stations and has low cost.

[0028] The main body of the floating body supporting the present invention is a double-layer blow-molded structure, which is processed by double-layer blow molding; wherein the supporting side is the outer layer and the other side is the inner layer. Figure 3 As shown, 1 is the outer layer, 2 is the hollow glass microspheres, and 3 is the inner layer. The hollow glass microspheres are evenly distributed in the outer layer structure of the float. The outer layer material is designed with high-density polyethylene, linear polyethylene, and reflective filling materials as the main components, and its main function is to increase the reflectivity; the reflective filling material is mainly a solid substance that is light-transmissive and has a certain strength, which can be an amorphous inorganic metal material or an organic glass; the present invention preferably uses hollow glass microspheres and their modified materials. As a micron-level lightweight inorganic material, hollow glass microspheres are hollow spherical particle powders, the main component of which is borosilicate, with a general particle size of 10 to 250 μm and a wall thickness of 1 to 2 μm; hollow glass microspheres have the characteristics of high compressive strength, high melting point, high resistivity, small thermal conductivity and thermal shrinkage coefficient.

[0029] The outer layer components preferably also include antioxidants, light stabilizers and impact stabilizers; preferably, the mass ratio of the outer layer material components is: 55-65 parts of high-density polyethylene, 15-25 parts of linear polyethylene, 5-15 parts of modified hollow glass microspheres, 2-5 parts of antioxidants, 5-10 parts of light stabilizers, and 1-2 parts of impact stabilizers.

[0030] Specifically, the high-density polyethylene melt index is 5-12 g / 10 min under a weight of 21.6 kg, and the density is 0.945-0.965 g / cm 3 (SABIC B5308). In addition, the linear polyethylene melt index is 0.2-3.0 g / 10 min under a weight of 2.16 kg, and the density is 0.925-0.955 g / cm 3 (SABIC CC027C).

[0031] The hollow glass microsphere material described in the preferred embodiment of the present invention has a silane-modified structure, which can be called (silane) modified hollow glass microspheres. Optionally, the preparation method of the modified hollow glass microspheres is as follows: the average particle size of the raw hollow glass microspheres is 10 to 120 μm, the hollow glass microspheres and the silane coupling agent (preferably KH550, 3-aminopropyltriethoxysilane) are placed in a high-speed mixer, and mixed for 5 to 10 minutes until uniform, and the mass proportion of the silane coupling agent is preferably 10% to 40%; the mixed hollow glass microspheres are placed in a thermostat and dried for 1 to 3 hours, and the temperature of the thermostat can be 50°C to 80°C. The density of the modified hollow glass microspheres is 0.2 to 0.6 g / cm 3 , the particle size range remains unchanged. The modification of hollow glass microspheres is mainly to hydrolyze the alkoxy group of the silane coupling agent to generate silanol, which then undergoes a condensation reaction with the Si-OH on the surface of the glass microspheres to form a chemical bond, thereby making the inorganic phase and the organic phase closely combined, enhancing the interface adhesion and improving the performance of the material.

[0032] Among them, the mass ratio of high-density polyethylene, linear polyethylene and hollow glass microsphere materials in the outer layer components is preferably 50-70:10-30:1-20, more preferably 55-65:15-25:5-15, such as 65:15:5, 60:20:10, 55:20:15, 56:18:16, 70:16:9, etc.

[0033] Meanwhile, the outer layer material formula of the embodiment of the present invention preferably includes: 2-5 parts by weight of antioxidant, 5-10 parts by weight of light stabilizer, and 1-2 parts by weight of impact resistance agent. The present invention preferably introduces hollow glass microsphere materials into the outer layer material formula, which can refract light through the glass microspheres while maintaining strength, and is reversely reflected by the background, thereby increasing the reflectivity.

[0034] In the embodiments of the present invention, the antioxidant may be a widely used phenolic antioxidant, or may be a phosphorus, sulfur, or other antioxidant, which mainly plays the role of delaying or inhibiting the oxidation of the polymer; antioxidant 1010 is preferred. Light stabilizers can be divided into light shielding agents, ultraviolet absorbers, quenchers, etc. according to the mechanism of action. The present invention preferably uses light stabilizer 770 (LS-770, also known as low molecular weight hindered amine light stabilizer 770). Anti-impact agents are also called impact toughening modifiers. Rubber elastomers, such as ethylene propylene rubber (EPR), etc., can be selected and applied in the embodiments of the present application; in some examples, the melt flow rate of commercially available EPR anti-impact agents is 7.5g / 10min and the density is 0.85g / cm 3 .

[0035] For the inner layer described in the present application, the design component of the inner layer material is mainly high-density polyethylene, and its main function is to increase the opacity of the molding material. Preferably, the components and mass ratios of the inner layer material are: 80-90 parts of high-density polyethylene, 2-5 parts of silver masterbatch, 2-5 parts of infrared blocking agent, 2-5 parts of antioxidant, and 5-10 parts of light stabilizer.

[0036] Furthermore, the high-density polyethylene melt index of the inner layer is 5-12 g / 10 min under a weight of 21.6 kg, and the density is 0.945-0.965 g / cm 3 (SABIC B5308), which can be consistent with the outer layer. On this basis, the present invention preferably also adds one or more of silver masterbatch, infrared blocker, antioxidant and light stabilizer to the inner layer, and more preferably multiple components are compounded. For example, the inner layer components include high-density polyethylene, silver masterbatch and infrared blocker, and the mass ratio of the three is preferably 80-95:1-5:1-5, and further 80-90:2-5:2-5.

[0037] The antioxidant and light stabilizer in the inner layer of the embodiment of the present invention can be consistent with the outer layer, or they can be different. The silver masterbatch contains silver components, which can reflect ultraviolet rays; commercially available products are used, such as those with a melt flow rate of 25g / 10min and a density of 1.05g / cm 3 The infrared blocking agent is mainly an inorganic powder that can reflect infrared rays, preferably one or more of talc powder and silicon dioxide powder; talc powder is a talc powder of the magnesium silicate mineral talc family, and its main component is hydrated magnesium silicate.

[0038] In an embodiment of the present invention, the outer wall thickness of the highly reflective float is 0.2-1 mm, and the inner wall thickness is 0.5-2 mm, which is beneficial to cost control, etc. The present invention has no special restrictions on the surface features of the float, the shape and size of the connecting ears and other parts.

[0039] Accordingly, an embodiment of the present invention provides a method for manufacturing a highly reflective floating body as described above, comprising the following steps:

[0040] The outer layer component raw materials and the inner layer component raw materials are mixed and granulated respectively; then added into the blow molding equipment, processed by using the float mold and double-layer co-extrusion blow molding method to make the high-reflective float.

[0041] According to the above components and proportions, the composite particles can be obtained by mixing and granulating in a twin-screw extruder. The outer layer component preferably also includes an antioxidant, a light stabilizer and an impact-resistant agent. The mixing and granulation of the outer layer component raw materials includes: weighing 55-65 parts of high-density polyethylene, 15-25 parts of linear polyethylene, 5-15 parts of reflective filling materials (preferably silane-modified hollow glass microspheres), 2-5 parts of antioxidants, 5-10 parts of light stabilizers, and 1-2 parts of impact resistance agents according to the mass ratio; adding the above components into a high-speed mixing tank and stirring evenly, the stirring speed can be 100-300r / min, and mixing for 5-10min until uniform; granulating the evenly mixed mixture in a twin-screw extruder, and the twin-screw extrusion temperature preferably includes four stages, the first stage temperature range is 160-170°C, the second stage temperature range is 175-185°C, the third stage temperature range is 190-200°C, and the fourth stage temperature range is 200-210°C, to obtain outer layer raw material composite particles.

[0042] In addition to high-density polyethylene, the inner layer component preferably also includes a silver masterbatch and an infrared blocking agent, as well as other additives. The raw material components and other contents involved in the preparation process are as described above and will not be repeated here. In a preferred embodiment of the present invention, the inner layer material components are: 80 to 90 parts of high-density polyethylene, 2 to 5 parts of silver masterbatch, 2 to 5 parts of infrared blocking agent, 2 to 5 parts of antioxidant, and 5 to 10 parts of light stabilizer. Weigh them according to a certain mass ratio, add them to a high-speed mixing tank and stir them evenly. The stirring speed can be 100 to 300 r / min, and mix for 5 to 10 minutes until uniform; the mixed mixture is granulated in a twin-screw extruder. The twin-screw extrusion temperature includes four stages. The temperature range of the first stage is 160 to 170 ° C, the temperature range of the second stage is 175 to 185 ° C, the temperature range of the third stage is 190 to 200 ° C, and the temperature range of the fourth stage is 200 to 210 ° C, so as to obtain the inner layer raw material composite particles.

[0043] In the embodiment of the present invention, the prepared raw material pellets of the inner and outer layers are added to the blow molding machine, and the float mold and the double-layer co-extrusion blow molding process are used to process the highly reflective float product. Preferably, the outer layer wall thickness of the obtained highly reflective float is 0.2 to 1 mm, and the inner layer wall thickness is 0.5 to 2 mm. In addition, the blow molding process conditions may include: extrusion speed 12 to 25 mm / s, mold temperature 22 to 40 ° C, and blow ratio 1.5 to 1.9.

[0044] The ultraviolet light reflectivity of the highly reflective floating body is above 50%, preferably greater than 80%, such as 85-95%. In an embodiment of the present invention, the visible light reflectivity of the highly reflective floating body is above 50%, preferably greater than 80%, such as 90-95%.

[0045] The present invention adopts a double-layer differentiated material design, wherein the outer layer material is designed by mixing high-density polyethylene and low-density polyethylene, and preferably the hollow glass microspheres and other reflective filling materials are modified to make them better integrated and dispersed in the base material, thereby improving the reflectivity of the outer layer material. At the same time, the inner layer material is designed with a high-density polyethylene base to ensure the supporting strength of the product, and silver masterbatch and infrared blocking agents can be added to further improve the reflectivity.

[0046] Furthermore, the present invention provides the use of the highly reflective floating body as described above in a floating power station, which can improve the luminous efficiency of the power station.

[0047] In order to better understand the technical content of the present invention, the following specific examples are provided to further illustrate the present invention. In the following examples, the high-density polyethylene melt index is 9.0 g / 10 min under a weight of 21.6 kg, and the density is 0.955 g / cm 3(Qatar 50100); linear polyethylene melt index is 0.5g / 10min under 2.16kg weight, density is 0.935g / cm 3 (SABIC CC027C).

[0048] Preparation method of modified hollow glass microspheres: the average particle size of the hollow glass microspheres is 50 μm. The hollow glass microspheres and the silane coupling agent KH550 are mixed in a high-speed mixer for 5 to 10 minutes until they are uniform. The mass proportion of the silane coupling agent is 20%. The treated hollow glass microspheres are placed in a constant temperature box and dried for 2 hours. The temperature of the constant temperature box is 50°C to 60°C.

[0049] The antioxidant involved is antioxidant 1010, the light stabilizer is light stabilizer 770, and the impact agent is ethylene propylene rubber (melt flow rate 7.5g / 10min, density 0.85g / cm 3 ); infrared blocking agent is talcum powder (500 mesh, density 2.7g / cm 3 ), silver masterbatch (melt flow rate 25g / 10min, density 1.05g / cm 3 ).

[0050] Comparative Example 1

[0051] 100 parts of high-density polyethylene were used to process a common float through single-layer blow molding, and the average single-layer wall thickness was 2.5 mm; this was recorded as sample 1.

[0052] In addition, the blow molding process conditions may include: extrusion speed 15 mm / s, mold temperature 45°C, blow ratio 1.6, product size 1200 mm*320 mm*300 mm, weight 5.3 kg.

[0053] Example 1

[0054] Outer layer material: 65 parts of high-density polyethylene, 15 parts of linear polyethylene, 5 parts of modified hollow glass microspheres, 2 parts of antioxidant, 5 parts of light stabilizer, 1 part of anti-impact agent; inner layer material: 80 parts of high-density polyethylene, 2 parts of silver masterbatch, 2 parts of infrared barrier, 2 parts of antioxidant, 5 parts of light stabilizer.

[0055] The outer layer material preparation method is as follows: add the above components into a high-speed mixing tank and stir evenly, the stirring speed is 200r / min, and mix for 5 to 10 minutes until uniform. The evenly mixed mixture is granulated in a twin-screw extruder. The twin-screw extrusion temperature includes four stages, the first stage temperature range is 160 to 170°C, the second stage temperature range is 175 to 185°C, the third stage temperature range is 190 to 200°C, and the fourth stage temperature range is 200 to 210°C; the obtained particles are the outer layer raw materials for the floating device.

[0056] The preparation method of the inner layer material is as follows: weigh the above components according to the mass ratio, add them into a high-speed mixing tank and stir them evenly, the stirring speed is 100r / min, and mix for 5 to 10 minutes until they are uniform. The evenly mixed mixture is granulated in a twin-screw extruder. The twin-screw extrusion temperature includes four stages, the first stage temperature range is 160 to 170°C, the second stage temperature range is 175 to 185°C, the third stage temperature range is 190 to 200°C, and the fourth stage temperature range is 200 to 210°C; the obtained particles are the raw materials for preparing the inner layer of the floating body equipment.

[0057] Add the prepared raw material pellets of the inner and outer layers into the blow molding machine, and use the mold and double-layer co-extrusion blow molding to process it into a floating product. The average wall thickness of the outer layer of the float is 1.0mm, and the average wall thickness of the inner layer is 1.5mm. The extrusion speed is 12-25mm / s, the mold temperature is 22-40℃, and the blow ratio is 1.5-1.9.

[0058] The obtained double-layer blow-molded high-reflective floating body is recorded as Sample 2.

[0059] Example 2

[0060] Outer layer material: 60 parts of high-density polyethylene, 20 parts of linear polyethylene, 10 parts of modified hollow glass microspheres, 2 parts of antioxidant, 5 parts of light stabilizer, 1 part of anti-impact agent; Inner layer material: 80 parts of high-density polyethylene, 3.5 parts of silver masterbatch, 2 parts of infrared blocker, 2 parts of antioxidant, 5 parts of light stabilizer;

[0061] According to the manufacturing process in Example 1, a double-layer blow-molded high-reflective floating body was obtained, which was recorded as Sample 3.

[0062] Example 3

[0063] Outer layer material: 55 parts of high-density polyethylene, 25 parts of linear polyethylene, 15 parts of modified hollow glass microspheres, 2 parts of antioxidant, 5 parts of light stabilizer, 1 part of anti-impact agent; Inner layer material: 80 parts of high-density polyethylene, 5 parts of silver masterbatch, 2 parts of infrared blocker, 2 parts of antioxidant, 5 parts of light stabilizer;

[0064] According to the manufacturing process in Example 1, a double-layer blow-molded high-reflective floating body was obtained, which was recorded as Sample 4.

[0065] Comparative Example 2

[0066] The average outer wall thickness of a common double-layer float is 1.25mm, and the average inner wall thickness is 1.25mm. The inner and outer layer materials are not much different. The outer layer material is high-density polyethylene + weather-resistant masterbatch, and the inner layer material is high-density polyethylene, which is mainly used to improve the single cavity formed inside the single-layer blow molding.

[0067] In addition, the blow molding process conditions may include: extrusion speed 10-18 mm / s, mold temperature 20-40° C., blow ratio 1.5-1.9. The product size is 1200 mm*320 mm*300 mm, and the weight is 5.3 kg, which is recorded as sample 5.

[0068] The highly reflective floating body obtained above was subjected to performance testing, and the results are as follows.

[0069] Table 1 Performance test of the floating body samples in the present invention

[0070]

[0071] After the above comparative tests, the ultraviolet and visible light reflectivity of the highly reflective floating body of the present invention are greatly improved compared with those of conventional floating bodies (the ultraviolet and visible light reflectivity of the comparative samples 1 and 5 are much lower than those of the samples 2 to 4 of the embodiments of the present invention), and the highly reflective floating body obtained in the embodiments of the present invention has good properties such as tensile strength, which has certain benefits for floating power stations using double-glass components.

[0072] It can be seen from the above embodiments that the scheme of the present invention adopts double-layer blow molding and differentiated material design for the inner and outer layers. The outer layer mainly improves the surface reflectivity and toughness, and the inner layer provides a certain strength. At the same time, it can also increase the light barrier, thereby improving the reflectivity of the floating body, and the ultraviolet light reflectivity is above 80%, thereby effectively improving the power generation efficiency of the double-glass component floating power station, so that the competitiveness of the product is further improved. In addition, the materials used are all conventional raw materials, with mature technical processes, convenient processing, and conducive to product implementation. The use of the highly reflective floating body described in this scheme, combined with the floating power station of the double-glass component, is conducive to solving the problem of low efficiency of photovoltaic power generation, effectively increasing power generation efficiency, and reducing the cost recovery period of investors.

[0073] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0074] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A highly reflective floating body, characterized in that: It has a double-layer blow-molded main body structure, wherein the outer layer components include: high-density polyethylene, linear polyethylene and reflective filling material; the reflective filling material is a hollow glass microsphere material, and the hollow glass microsphere material has a silane-modified structure; the outer layer components also include an antioxidant, a light stabilizer and an anti-impact agent; The inner layer component includes high-density polyethylene; the inner layer component also includes silver masterbatch and infrared blocking agent; The ultraviolet light reflectivity of the highly reflective floating body is above 50%.

2. The highly reflective floating body according to claim 1, characterized in that: The mass ratio of high-density polyethylene, linear polyethylene and hollow glass microsphere materials in the outer layer components is 50-70:10-30:1-20.

3. The highly reflective floating body according to claim 1, characterized in that: The mass ratio of high-density polyethylene, silver masterbatch and infrared blocking agent in the inner layer components is 80-95:1-5:1-5.

4. The highly reflective floating body according to any one of claims 1 to 3, characterized in that: The outer layer has a wall thickness of 0.2-1 mm, and the inner layer has a wall thickness of 0.5-2 mm.

5. The highly reflective floating body according to any one of claims 1 to 3, characterized in that: The visible light reflectivity of the highly reflective floating body is above 50%.

6. The highly reflective floating body according to claim 5, characterized in that: The visible light reflectivity of the highly reflective floating body is greater than 80%.

7. The method for making a highly reflective floating body according to any one of claims 1 to 6, characterized in that: include: The outer layer component raw materials and the inner layer component raw materials are mixed and granulated respectively, and then added into the blow molding equipment, and processed by using the floating body mold and double-layer co-extrusion blow molding method to make the high-reflective floating body.

8. The method according to claim 7, characterized in that: The reflective filling material in the outer layer component is a hollow glass microsphere material, which is obtained by the following operation: hollow glass microspheres with an average particle size of 10 to 120 μm are mixed with a silane coupling agent at a high speed and then dried; the mass proportion of the silane coupling agent is 10% to 40%.

9. The manufacturing method according to claim 7, characterized in that: The mixing and granulation of the outer layer component raw materials includes: mixing high-density polyethylene, linear polyethylene, reflective filling material, antioxidant, light stabilizer and impact resistance agent, and then performing multi-section extrusion granulation at a temperature of 160-210°C.

10. The manufacturing method according to claim 7, characterized in that: The blow ratio in the double-layer co-extrusion blow molding method is 1.5-1.

9.

11. Use of the highly reflective floating body according to any one of claims 1 to 6 in a floating power station.

Images