阅读说明：本技术 一种网格高黏性光伏反光贴膜及其制作方法 (Grid high-viscosity photovoltaic light-reflecting adhesive film and manufacturing method thereof ) 是由 童伟 黄宝玉 吕松 吴丰华 吴斌 于 2019-09-26 设计创作，主要内容包括：本发明提供一种网格高黏性光伏反光贴膜,从下到上依次为粘结层、网格载体层、结构层和反光层,载体层网格为多个菱形或正方形,并且选用EVA、EEA和SBS共混树脂作为粘结层材料,该网格高黏性光伏反光贴膜的制作方法为：首先在载体层下表面形成网格；其次在载体层上表面形成结构层；再在结构层表面镀覆一层金属铝；然后粘结层涂覆网格载体层的下表面。本发明制备的高黏性光伏反光贴膜在其贴覆和组件层压阶段,保持与焊带的粘接,防止反光膜的错位和偏移,简化返修工序,提高生产效率。(The invention provides a grid high-viscosity photovoltaic light-reflecting adhesive film which sequentially comprises a bonding layer, a grid carrier layer, a structural layer and a light-reflecting layer from bottom to top, wherein grids of the carrier layer are in a plurality of rhombuses or squares, EVA (ethylene vinyl acetate), EEA (ethylene-acrylic acid) and SBS (styrene-butadiene-styrene) blended resins are selected as bonding layer materials, and the manufacturing method of the grid high-viscosity photovoltaic light-reflecting adhesive film comprises the following steps: firstly, forming a grid on the lower surface of a carrier layer; secondly, forming a structural layer on the upper surface of the carrier layer; plating a layer of metal aluminum on the surface of the structural layer; the adhesive layer then coats the lower surface of the mesh carrier layer. The high-viscosity photovoltaic reflecting adhesive film prepared by the invention keeps bonding with the welding strip in the stages of adhering and laminating the assembly, prevents dislocation and deviation of the reflecting film, simplifies the repair process and improves the production efficiency.)

1. The utility model provides a high stickness photovoltaic reflection of light pad pasting of net which characterized in that: the utility model provides a photovoltaic module cell piece is including the first surface of structural layer, the second surface of structural layer, the structural layer is provided with the first surface and with the second surface that the first surface corresponds, the third surface is planar structure, the fourth surface is the prismatic face of fluctuation, the tie coat have the fifth surface and with the sixth surface that the fifth surface corresponds, the sixth surface is planar structure, the third surface laminating the first surface, the reflection of light layer laminate in the fourth surface, the fifth surface laminate the second surface, the sixth surface bonds on photovoltaic module cell piece openly welds the area.

2. The grid high-viscosity photovoltaic reflective adhesive film as claimed in claim 1, wherein: the plurality of ridge lines of the prismatic surface are perpendicular to the plurality of valley bottom lines of the wavy surface, the grid high-viscosity photovoltaic light-reflecting adhesive film is provided with a first vertical section and a second vertical section, the first vertical section is perpendicular to the second vertical section, the prismatic surface is any one or combination of more than two of a triangle, an arc or a polygon on the first vertical section, and the wavy surface is any one or combination of more than two of a triangle, an arc or a polygon on the second vertical section.

3. the grid high-viscosity photovoltaic reflective adhesive film as claimed in claim 1, wherein: the grid is arranged on the second surface and provided with a plurality of parallel first oblique lines and a plurality of parallel second oblique lines, the plurality of parallel first oblique lines and the plurality of parallel second oblique lines are mutually crossed to form a plurality of grid-shaped structures with concave middle parts, and the bonding layer is filled in the concave parts.

4. The grid high-viscosity photovoltaic reflective adhesive film according to claim 3, wherein: the plurality of lattices enclose a plurality of diamonds or a plurality of squares.

5. the grid high ~ viscosity photovoltaic light reflecting adhesive film as claimed in claim 3, wherein the depth of the depression is 2 ~ 10 μm, and the width is 2 ~ 10 μm.

6. the grid high ~ viscosity photovoltaic light ~ reflecting adhesive film as claimed in claim 1, wherein the thickness of the bonding layer is 10 ~ 25 μm, the thickness of the grid carrier layer is 30 ~ 60 μm, the thickness of the structural layer is 15 ~ 30 μm, and the thickness of the light ~ reflecting layer is 20 ~ 60 nm.

7. the grid high ~ viscosity photovoltaic light reflecting adhesive film as claimed in claim 1, wherein the components of the bonding layer are EVA, EEA and SBS blended resin, wherein the EVA content is 40 ~ 70wt%, the SBS content is 5 ~ 20wt%, the grid carrier layer is made of any one of PVDF, PET and PBT, and the light reflecting layer is made of aluminum.

8. The grid high-viscosity photovoltaic reflective adhesive film as claimed in claim 1, wherein: the reflecting layer is prepared by any one of the processes of evaporation plating, electroplating, magnetron sputtering and electron beam deposition.

9. a manufacturing method of a grid high-viscosity photovoltaic reflective adhesive film is characterized by comprising the following steps:

(1) Prefabricating a stripe pattern compression roller, and then passing the base material through the compression roller to form a grid carrier layer with a smooth upper surface and a grid dent lower surface by adopting roll-to-roll hot extrusion molding;

(2) Preparing a prism structure on the surface of a compression roller in advance, then spraying ultraviolet curing glue on the upper surface of the grid carrier layer, and simultaneously performing ultraviolet curing through the compression roller to enable the prism structure to be attached to the grid carrier layer to form a structure layer;

(3) plating a layer of metal aluminum on the upper surface of the structural layer to form a light reflecting layer compounded along a plurality of prism structures;

(4) And mixing EVA, EEA and SBS resin for granulation, and then coating the mixture on the lower surface of the grid carrier layer through melt extrusion to form a bonding layer, so as to prepare the grid high-viscosity photovoltaic reflective adhesive film.

10. The method for manufacturing the grid high-viscosity photovoltaic reflective adhesive film according to claim 9, wherein the method comprises the following steps: the reflecting layer is prepared by any one of the processes of evaporation plating, electroplating, magnetron sputtering and electron beam deposition.

Technical Field

The invention belongs to the technical field of photovoltaics, and particularly relates to a grid high-viscosity photovoltaic reflective adhesive film and a manufacturing method thereof.

Background

With the rapid development of social economy, the large-scale and unregulated development and utilization of fossil fuels not only causes increasingly serious environmental pollution, but also accelerates the exhaustion of the resources, so that the development and utilization of efficient and green energy sources become global consensus. The main utilization of the abundant, easily available and pollution-free green energy source of the solar energy is photovoltaic power generation, the efficiency of the photovoltaic module is efficiently improved, and the main utilization is a key problem concerned by the photovoltaic industry. And present prior art promotes more and more difficult to photovoltaic cell piece efficiency, and drops into greatly, and it is lower to photovoltaic module promotion effect, so other promotion ways receive more and more attention.

in the existing conventional photovoltaic module, nearly 4% of the area of the surface of a battery piece which is critical for photoelectric conversion is covered by a welding strip and cannot be illuminated, so that the output power of the module is directly influenced, and therefore, a reflective film attached to the welding strip is developed and applied. However, since the reflective film is attached to the surface of the solder strip by means of hot-melt adhesion of PE, SIS and EVA, the adhesive force between the adhesive and the solder strip is insufficient, and the problem of the reflective film falling off and shifting can occur in the stages of attaching the reflective film and laminating the module. In addition, the offset reflective film needs to be stripped from the welding strip and re-attached in the attaching and repairing process, a large amount of adhesives are left on the surface of the welding strip after stripping, and an additional cleaning process is needed, so that the repairing process is complicated, and the production efficiency of the assembly is influenced.

Therefore, in order to meet the above requirements, a brand new high-viscosity photovoltaic reflective adhesive film needs to be developed.

Disclosure of Invention

the technical problem to be solved by the invention is to provide the grid high-viscosity photovoltaic light-reflecting adhesive film, so that the deviation and dislocation of the light-reflecting film in the lamination stage are reduced, the repair process of the light-reflecting film is simplified, and the production efficiency of the assembly is improved.

In order to solve the technical problems, the invention provides a grid high-viscosity photovoltaic light-reflecting adhesive film which is formed by combining a bonding layer, a grid carrier layer, a structural layer and a light-reflecting layer which are sequentially stacked, the grid carrier layer is provided with a first surface and a second surface corresponding to the first surface, the first surface is a plane structure, the second surface is an undulating wavy surface, the structural layer is provided with a third surface and a fourth surface corresponding to the third surface, the third surface is a planar structure, the fourth surface is an undulating prismatic surface, the bonding layer has a fifth surface and a sixth surface corresponding to the fifth surface, the sixth surface is a plane structure, the third surface is attached to the first surface, the reflective layer is attached to the fourth surface, the fifth surface is attached to the second surface, and the sixth surface is bonded to the welding strip on the front side of the photovoltaic module cell.

As a preferable embodiment of the grid high-viscosity photovoltaic reflective adhesive film, a plurality of ridge lines of the prismatic surface are perpendicular to a plurality of valley bottom lines of the wavy surface, the grid high-viscosity photovoltaic reflective adhesive film has a first vertical cross section and a second vertical cross section, the first vertical cross section is perpendicular to the second vertical cross section, the prismatic surface is any one or a combination of more than two of a triangle, an arc or a polygon on the first vertical cross section, and the wavy surface is any one or a combination of more than two of a triangle, an arc or a polygon on the second vertical cross section.

As a preferable scheme of the grid high-viscosity photovoltaic light-reflecting adhesive film, the grid is arranged on the second surface, the grid is provided with a plurality of parallel first oblique lines and a plurality of parallel second oblique lines, the plurality of parallel first oblique lines and the plurality of parallel second oblique lines are mutually crossed to form a plurality of grid-shaped structures with concave middle parts, and the bonding layer fills the concave parts.

as a preferable scheme of the grid high-viscosity photovoltaic reflective adhesive film, the plurality of grid structures surround a plurality of diamonds or a plurality of squares.

as a preferable scheme of the grid high-viscosity photovoltaic light-reflecting adhesive film, the depth of the depression is 2-10 mu m, and the width of the depression is 2-10 mu m.

As a preferable scheme of the grid high-viscosity photovoltaic light-reflecting adhesive film, the thickness of the bonding layer is 10-25 mu m, the thickness of the grid carrier layer is 30-60 mu m, the thickness of the structural layer is 15-30 mu m, and the thickness of the light-reflecting layer is 20-60 nm.

as a preferable scheme of the grid high-viscosity photovoltaic light-reflecting adhesive film, the components of the bonding layer are EVA, EEA and SBS blended resin, wherein the EVA content is 40-70 wt%, the SBS content is 5-20 wt%, the grid carrier layer is made of any one of PVDF, PET and PBT, and the light-reflecting layer is made of aluminum.

as a preferred scheme of the grid high-viscosity photovoltaic light-reflecting film, the light-reflecting layer is prepared by any one of the processes of evaporation, electroplating, magnetron sputtering and electron beam deposition.

The invention also provides a manufacturing method of the grid high-viscosity photovoltaic reflective adhesive film, which comprises the following steps:

(1) Prefabricating a stripe pattern compression roller, and then passing the base material through the compression roller to form a grid carrier layer with a smooth upper surface and a grid dent lower surface by adopting roll-to-roll hot extrusion molding;

(2) preparing a prism structure on the surface of a compression roller in advance, then spraying ultraviolet curing glue on the upper surface of the grid carrier layer, and simultaneously performing ultraviolet curing through the compression roller to enable the prism structure to be attached to the grid carrier layer to form a structure layer;

(3) Plating a layer of metal aluminum on the upper surface of the structural layer to form a light reflecting layer compounded along a plurality of prism structures;

(4) And mixing EVA, EEA and SBS resin for granulation, and then coating the mixture on the lower surface of the grid carrier layer through melt extrusion to form a bonding layer, so as to prepare the grid high-viscosity photovoltaic reflective adhesive film.

As a preferred scheme of the grid high-viscosity photovoltaic light-reflecting film, the light-reflecting layer is prepared by any one of the processes of evaporation, electroplating, magnetron sputtering and electron beam deposition.

Compared with the prior art, the grid high-viscosity photovoltaic light-reflecting adhesive film provided by the invention has the following advantages:

1. the EVA, EEA and SBS blended resin is selected as the bonding layer material, has excellent low and high temperature bonding performance with the welding strip, and keeps bonding with the welding strip in the stages of laminating the reflective film and the assembly, thereby preventing dislocation and offset of the reflective film;

2. Choose the net carrier layer for use, strengthen the adhesive force of adhesive and carrier layer, in the reflective membrane reprocesses the peel off-process, prevent that tie coat and carrier layer from separating, remain and weld the area surface, improve the efficiency of reprocessing.

Drawings

in order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein the content of the first and second substances,

fig. 1 is a schematic perspective view of a grid high-viscosity photovoltaic reflective film according to the present invention;

FIG. 2 is a schematic structural view of a first vertical cross section of a grid high-viscosity photovoltaic reflective patch of the present invention;

FIG. 3 is a schematic structural view of a grid carrier layer of a grid high-viscosity photovoltaic reflective patch of the present invention in a second vertical cross section;

FIG. 4 is a schematic diagram of the second surface of the grid carrier layer of the grid high-adhesion photovoltaic reflective sticker of the invention in the grid structure of example 2;

Fig. 5 is a schematic diagram of the grid structure of the second surface of the grid carrier layer of the grid high-adhesion photovoltaic reflective sticker of the invention in example 3.

Wherein: 1 is a bonding layer, 2 is a grid carrier layer, 3 is a structural layer, 4 is a reflective layer, 5 is a ridge, 6 is a wave valley bottom line, 7 is a first vertical section, 8 is a second vertical section, 9 is a first oblique line, and 10 is a second oblique line.

Detailed Description

the present invention will be described in further detail with reference to specific embodiments in order to make the above objects, features and advantages more apparent and understandable.

first, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Next, the present invention is described in detail by using a schematic structural diagram, etc., and for convenience of illustration, a schematic diagram illustrating a structure of a grid high-viscosity photovoltaic reflective adhesive film will not be partially enlarged according to a general scale when describing an embodiment of the present invention in detail, and the schematic diagram is only an example, and should not limit the scope of the present invention. In addition, the actual fabrication process should include three-dimensional space of length, width and depth.

The grid high-viscosity photovoltaic light-reflecting adhesive film is formed by combining a bonding layer 1, a grid carrier layer 2, a structural layer 3 and a light-reflecting layer 4 which are sequentially stacked from bottom to top.

The thickness of the grid carrier layer 2 is 30-60 mu m, the material of the grid carrier layer 2 is any one of PVDF, PET and PBT, as shown in figure 1, a bonding layer 1 is arranged below the grid carrier layer 2, the thickness of the bonding layer 1 is 10-25 mu m, the components of the bonding layer 1 are EVA, EEA and SBS blending resin, wherein the EVA content is 40-70 wt%, and the SBS content is 5-20 wt%. The upper surface of the grid carrier layer 2 is a first surface (not shown) and is of a plane structure, the lower surface of the grid carrier layer is a second surface (not shown) and is of a wave surface structure, the bonding layer 1 fills depressions among the wave surface structures, the upper surface of the bonding layer 1 is a fifth surface (not shown) and is matched with the wave surface structures, the lower surface of the bonding layer 1 is a sixth surface (not shown) and is of a plane structure, the bonding layer is bonded on the front welding strip of the photovoltaic module battery piece, the structural layer 3 is arranged above the grid carrier layer 2, the thickness of the structural layer 3 is 15-30 mu m, the lower surface of the structural layer 3 is a third surface (not shown) and is of a plane structure, the upper surface of the structural layer is a fourth surface (not shown) and is of a plurality of prism structures, the reflective layer 4 is arranged above the structural layer 3, the reflective layer 4 is made of.

As shown in fig. 2, the section in this direction is a first vertical section 7, in fig. 2, it can be seen that the section of the prismatic surface is a triangle, the vertex of each triangle is a point on a plurality of edges 5 of the prismatic surface, the section of the prismatic surface can be any one or a combination of more than two of the triangles, arcs or polygons, in this first vertical section 7, the mesh carrier layer 2 is a rectangular section, the upper side of this rectangular section is a side on the first surface, the lower side is a side on the second surface, and this lower side is one of valley bottom lines 6 of the wavy surface. The ridge 5 and the valley bottom line 6 are not in the same plane.

As shown in fig. 3, the second surface, i.e. the wavy surface, of the mesh carrier layer 2 is formed by one or more groups of parallel depressions, the longitudinal sections of the depressions are any one or a combination of two or more of triangles, arcs or polygons, and the vertical plane where the longitudinal sections of the depressions are located is the second vertical section 8, so that the first vertical section 7 and the second vertical section 8 are perpendicular to each other.

as shown in fig. 4 and 5, the second surface is provided with a grid, the edge of the grid is divided into a plurality of first oblique lines 7 and a plurality of second oblique lines 8 according to the trend, a plurality of rhombuses or squares with middle depressions are formed by the plurality of first oblique lines 7 and the plurality of second oblique lines 8, the depth of the depression is 2-10 μm, and the width is 2-10 μm.

The preparation method of the grid high-viscosity photovoltaic reflective adhesive film shown in fig. 1 comprises the following steps:

Step 1, prefabricating a stripe pattern compression roller, and then passing the base material through the compression roller to form a grid carrier layer 2 with a smooth upper surface and a concave lower surface by adopting roll-to-roll hot extrusion molding;

Step 2, preparing the prism microstructure on the surface of a compression roller in advance, then spraying ultraviolet curing glue on the upper surface of the grid carrier layer 2, and simultaneously performing ultraviolet curing through the compression roller to enable the prism structure to be attached to the grid carrier layer 2 to form a structural layer 3;

step 3, plating a layer of metal aluminum on the upper surface of the structural layer 3 to form a reflecting layer 4 compounded along a plurality of prism structures;

And 4, blending and granulating EVA and SIS resin, and coating the EVA and SIS resin on the lower surface of the grid carrier layer 2 through melt extrusion to form a bonding layer 1 so as to prepare the grid high-viscosity photovoltaic reflective adhesive film.