Composite sheet for special-shaped surface protection and wind power blade with protective layer

Abstract

The utility model relates to a special-shaped surface protective composite sheet. The composite sheet comprises an organic polymer layer and an adhesive layer, first concave lines are arranged on the surface, facing the adhesive layer, of the organic polymer layer; second concave lines are arranged on the surface, back on to the adhesive layer, of the organic polymer layer; the organic polymer layer is directly bonded with the adhesive layer; and the surface, opposite to the organic polymer layer, of the adhesive layer is an external bonding surface of the composite sheet. After the composite sheet for protecting the special-shaped surface is attached to the special-shaped surface, wrinkles and bumps of the protective surface are obviously reduced, and the composite sheet is smooth in surface and convenient to use.

Description

Technical Field

[0001] The present application relates to a surface protection material, and in particular to a composite sheet material for protecting special-shaped surfaces and a wind turbine blade with a protection layer. Background Art

[0002] The sheet used for special-shaped surface protection needs to fit the contact surface as closely as possible. The degree of fit of the sheet is often closely related to its actual protective effect, which in turn determines the performance and service life of the equipment. For example, wind turbine blades, as a typical special-shaped surface, are easily eroded by the external environment. If they are not protected, they will affect the power generation or even be damaged. However, protective sheets that are not well fitted will form an uneven surface on the blades, and the uneven surface is one of the reasons that affect the power generation, which leads to limited or even counterproductive effects of protective materials. It can be seen that it is of great significance to develop a protective material that can be used for special-shaped surfaces.

[0003] CN217197269U discloses a layered composite component, including an ultra-high molecular weight polyethylene outer layer and an EPDM rubber layer, the EPDM rubber layer can directly bond the ultra-high molecular weight polyethylene outer layer to other components, solving the problem of needing other adhesives or bonding layers when used. CN216300399U discloses an ultra-high molecular weight polyethylene double-layer composite sheet, including an ultra-high molecular weight polyethylene layer, a rubber layer is provided on the surface, solving the problems of poor adhesion, shock absorption, energy absorption and impact resistance of ultra-high molecular weight polyethylene.

[0004] However, the above technical solution does not solve the problem that wrinkles are easily formed when the protective sheet is attached to the special-shaped surface and the surface is not smooth enough. Utility Model Content

[0005] Based on this, one or more embodiments of the present application provide a composite sheet for protecting irregular surfaces and a wind turbine blade with a protective layer. After the composite sheet is bonded to the irregular surface, wrinkles and bulges are not likely to occur, and the surface is smooth and easy to use.

[0006] A composite sheet for protecting a special-shaped surface, comprising an organic polymer layer and an adhesive layer;

[0007] The surface of the organic polymer layer facing the adhesive layer is provided with a first concave pattern;

[0008] The surface of the organic polymer layer facing away from the adhesive layer is provided with a second concave pattern;

[0009] The organic polymer layer is directly bonded to the adhesive layer;

[0010] The surface of the adhesive layer facing away from the organic polymer layer is the external bonding surface of the composite sheet.

[0011] In one embodiment, the depth of the first concave lines is 0.1 mm to 1 mm.

[0012] In one embodiment, the first concave pattern is a sawtooth pattern, and the width of each sawtooth is 0.1 mm to 1 mm.

[0013] In one embodiment, the depth of the second concave lines is 0.1 mm to 1 mm.

[0014] In one embodiment, the second concave lines are sawtooth lines, and the width of each sawtooth is 0.1 mm to 1 mm.

[0015] In one embodiment, the organic polymer layer is a composite layer comprising an ultra-high molecular weight polyethylene layer and a polyethylene layer;

[0016] The polyethylene layer is directly bonded to the adhesive layer.

[0017] In one embodiment, the ultra-high molecular weight polyethylene layer and the polyethylene layer are bonded by pressing.

[0018] In one embodiment, the thickness of the ultra-high molecular weight polyethylene layer is 0.1 mm to 1.8 mm;

[0019] The thickness of the polyethylene layer is 0.05 mm to 0.15 mm.

[0020] In one embodiment, the thickness of the organic polymer layer is 0.1 mm to 1.8 mm;

[0021] The thickness of the adhesive layer is 0.05 mm to 0.15 mm.

[0022] In one embodiment, the thickness of the composite sheet is 0.2 mm to 2 mm.

[0023] The above-mentioned composite sheet for protecting special-shaped surfaces includes an organic polymer layer and an adhesive layer. The surfaces of the organic polymer layer facing and facing away from the adhesive layer are provided with concave patterns, which can effectively reduce the tension and avoid wrinkles and bulges caused by the surface being too hard to stretch, thereby making the bonding effect between the external bonding surface and the target bonding layer closer. In addition, the organic polymer layer and the adhesive layer are directly bonded, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a composite sheet for protecting special-shaped surfaces according to an embodiment of the present application.

[0025] Figure 2 This is a schematic structural diagram of a composite sheet for protecting special-shaped surfaces according to an embodiment of the present application.

[0026] Figure 3 This is a schematic diagram of the external bonding surface of a composite sheet for protecting special-shaped surfaces according to an embodiment of the present application.

[0027] Figure 4 It is a schematic diagram of a wind turbine blade with a protective layer according to an embodiment of the present application.

[0028] Description of reference numerals:

[0029] 10-composite sheet, 11-organic polymer layer, 12-adhesive layer;

[0030] 20-composite sheet, 21-organic polymer layer, 211-ultra-high molecular weight polyethylene layer, 212-polyethylene layer, 22-adhesive layer;

[0031] 30-composite sheet, 33-triangular notch, 34-fan blade. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0033] The term "composite sheet" as used in this application refers to a component having a layered, composite structure and composition, which can be either flexible or rigid depending on the adjustment of influencing factors such as the thickness of each layer.

[0034] A composite sheet for protecting special-shaped surfaces comprises an organic polymer layer and an adhesive layer. The surface of the organic polymer layer facing the adhesive layer is provided with a first concave pattern, and the surface of the organic polymer layer facing away from the adhesive layer is provided with a second concave pattern. The organic polymer layer and the adhesive layer are directly bonded, and the surface of the adhesive layer facing away from the organic polymer layer is the external bonding surface of the composite sheet.

[0035] The organic polymer layer can be a single layer composed of the same material, or a composite layer composed of different layers of different materials. The materials used to constitute the organic polymer layer include but are not limited to ultra-high molecular weight polyethylene and conventional polyethylene. Ultra-high molecular weight polyethylene (UHMWPE) refers to polyethylene with a molecular weight of more than 1.5 million, and conventional polyethylene (PE) refers to polyethylene with a molecular weight of 10,000 to 100,000.

[0036] The thickness of the organic polymer layer is 0.1 mm to 1.8 mm, preferably 0.3 mm to 1 mm.

[0037] The thickness of the adhesive layer is 0.05 mm to 0.15 mm, preferably 0.08 mm to 1.2 mm.

[0038] The thickness of the composite sheet is 0.2 mm to 2 mm, preferably 0.5 mm to 1.5 mm.

[0039] The depth of the first concave lines is 0.1 mm to 1 mm.

[0040] The depth of the second concave lines is 0.1 mm to 1 mm.

[0041] The first concave lines may be sawtooth lines, and the width of each sawtooth is 0.1 mm to 1 mm.

[0042] The second concave lines may be sawtooth lines, and the width of each sawtooth is 0.1 mm to 1 mm.

[0043] Preferably, the depth of the first concave lines is shallower than that of the second concave lines, which can better reduce surface tension; the first concave lines can also have a matte effect, and the second concave lines can also increase the contact area with the adhesive layer and increase the bonding strength between the two.

[0044] like Figure 1 As shown, a composite sheet 10 for protecting special-shaped surfaces includes an organic polymer layer 11 and an adhesive layer 12. The surface of the organic polymer layer 11 facing the adhesive layer 12 is provided with a first concave pattern, and the surface of the organic polymer layer 11 facing away from the adhesive layer 12 is provided with a second concave pattern. The organic polymer layer 11 and the adhesive layer 12 are directly bonded, and the surface of the adhesive layer 12 facing away from the organic polymer layer is the external bonding surface of the composite sheet.

[0045] The thickness of the organic polymer layer 11 is 0.1 mm to 1.8 mm, preferably 0.3 mm to 1 mm.

[0046] The thickness of the adhesive layer 12 is 0.05 mm to 0.15 mm, preferably 0.08 mm to 1.2 mm.

[0047] The thickness of the composite sheet 10 is 0.2 mm to 2 mm, preferably 0.5 mm to 1.5 mm.

[0048] The first concave lines are sawtooth lines with a depth of 0.1 mm to 1 mm, and a width of each sawtooth of 0.1 mm to 1 mm.

[0049] The second concave lines are sawtooth lines with a depth of 0.1 mm to 1 mm, and a width of each sawtooth of 0.1 mm to 1 mm.

[0050] like Figure 2 As shown, a composite sheet 20 for protecting special-shaped surfaces includes an organic polymer layer 21 and an adhesive layer 22. The organic polymer layer 21 is a composite layer including an ultra-high molecular weight polyethylene layer 211 and a polyethylene layer 212. The surface of the organic polymer layer 21 facing the adhesive layer 22 is provided with a first concave pattern, and the surface of the organic polymer layer 21 facing away from the adhesive layer 22 is provided with a second concave pattern. The organic polymer layer 21 and the adhesive layer 22 are directly bonded, and the surface of the adhesive layer 22 facing away from the organic polymer layer is the external bonding surface of the composite sheet.

[0051] The thickness of the ultra-high molecular weight polyethylene layer 211 is 0.1 mm to 1.8 mm, preferably 0.5 mm to 1.5 mm.

[0052] The thickness of the polyethylene layer 212 is 0.05 mm to 0.3 mm, preferably 0.05 mm to 0.2 mm.

[0053] The thickness of the organic polymer layer 21 is 0.1 mm to 1.8 mm, preferably 0.3 mm to 1 mm.

[0054] The thickness of the adhesive layer 22 is 0.05 mm to 0.15 mm, preferably 0.5 mm to 0.1 mm.

[0055] The thickness of the composite sheet 20 is 0.2 mm to 2 mm, preferably 0.5 mm to 1.5 mm.

[0056] The first concave lines are sawtooth lines with a depth of 0.1 mm to 1 mm, and a width of each sawtooth of 0.1 mm to 1 mm.

[0057] The second concave lines are sawtooth lines with a depth of 0.1 mm to 1 mm, and a width of each sawtooth of 0.1 mm to 1 mm.

[0058] Preferably, the ultra-high molecular weight polyethylene layer 211 and the polyethylene layer 212 are bonded by pressing, and the polyethylene layer 212 is directly bonded to the adhesive layer 22, so that the bonding between the layers of the composite sheet formed in this way is better.

[0059] Preferably, the polyethylene layer 212 may be pre-treated by, for example, corona treatment, so that the polyethylene layer 212 and the adhesive layer 22 are bonded more stably.

[0060] like Figure 3 As shown, the composite sheet 30 for protecting the irregular surface is provided with triangular notches 33 on both sides, which is conducive to better adhesion to the irregular surface and reduces wrinkles and bulges.

[0061] A wind turbine blade with a protective layer, wherein the protective layer is attached to both sides of the blade edge of the wind turbine blade;

[0062] The protective layer is a composite sheet for protecting special-shaped surfaces as described in any technical solution of the present application.

[0063] Triangular notches are provided on both sides of the protective layer parallel to the blade edge of the wind turbine blade, which is conducive to the composite sheet to better follow the shape of the blade edge.

[0064] like Figure 4 As shown, a wind turbine blade 34 with a protective layer has composite sheets 30 attached to both sides of the blade edge of the wind turbine blade, and triangular notches 33 are arranged on both sides of the composite sheet 30 parallel to the blade edge of the wind turbine blade.

[0065] Preferably, the size information of the wind turbine blades is first collected, and the blade fitting process is simulated by a computer. During the simulated fitting, due to the change in the amplitude of the blade edge curve, the composite sheets will partially overlap, and the overlap will be more obvious closer to the blade tip. The overlapping part is marked, the size is recorded and the mark is transferred to the composite sheet, and then a triangular cutter is used to cut a triangular notch 1 cm to 2 cm in front of the mark.

[0066] Preferably, after the bonding is completed, the sealant is applied to the notch and dried and cured to obtain a seamless, smooth and flat surface.

[0067] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A composite sheet for protecting special-shaped surfaces, characterized in that: comprising an organic polymer layer and an adhesive layer; The surface of the organic polymer layer facing the adhesive layer is provided with a first concave pattern; The surface of the organic polymer layer facing away from the adhesive layer is provided with a second concave pattern; The organic polymer layer is directly bonded to the adhesive layer; The surface of the adhesive layer facing away from the organic polymer layer is the external bonding surface of the composite sheet.

2. The composite sheet for protecting special-shaped surfaces according to claim 1, characterized in that: The depth of the first concave pattern is 0.1 mm to 1 mm; Furthermore, the first concave lines are sawtooth lines, and the width of each sawtooth is 0.1 mm to 1 mm.

3. The composite sheet for protecting special-shaped surfaces according to claim 1, characterized in that: The depth of the second concave pattern is 0.1 mm to 1 mm; Furthermore, the second concave lines are sawtooth lines, and the width of each sawtooth is 0.1 mm to 1 mm.

4. The composite sheet for protecting a special-shaped surface according to any one of claims 1 to 3, characterized in that: The organic polymer layer is an ultra-high molecular weight polyethylene layer.

5. The composite sheet for protecting a special-shaped surface according to any one of claims 1 to 3, characterized in that: The organic polymer layer is a composite layer comprising an ultra-high molecular weight polyethylene layer and a polyethylene layer; The ultra-high molecular weight polyethylene layer and the polyethylene layer are bonded by pressing; The polyethylene layer is directly bonded to the adhesive layer.

6. The composite sheet for protecting special-shaped surfaces according to claim 5, characterized in that: The thickness of the ultra-high molecular weight polyethylene layer is 0.1 mm to 1.8 mm; The thickness of the polyethylene layer is 0.05 mm to 0.15 mm.

7. The composite sheet for protecting special-shaped surfaces according to any one of claims 1 to 3 and 6, characterized in that: The thickness of the organic polymer layer is 0.1 mm to 1.8 mm; The thickness of the adhesive layer is 0.05 mm to 0.15 mm.

8. The composite sheet for protecting special-shaped surfaces according to any one of claims 1 to 3 and 6, characterized in that: The thickness of the composite sheet is 0.2 mm to 2 mm.

9. A wind turbine blade with a protective layer, characterized in that: The blade edges of the wind turbine blades are provided with protective layers on both sides; The protective layer is a composite sheet for protecting special-shaped surfaces as described in any one of claims 1 to 8.

10. The wind turbine blade with a protective layer according to claim 9, characterized in that: The protective layer is provided with triangular notches on both sides parallel to the blade edge of the wind turbine blade.

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