CN205326403U - Dull polish EVA glued membrane - Google Patents

Abstract

The utility model relates to the technical field of adhesive films, in particular to a frosted EVA adhesive film, which comprises a first transparent EVA adhesive film layer, a glass fiber layer, a white EVA adhesive film layer, and a second transparent EVA adhesive film layer from top to bottom. The above-mentioned layers are bonded by hot pressing, and the upper and lower ends of the EVA film are respectively frosted, the depth of the frosted layer is 30-60 μm, and the frosted particles of the frosted layer are 100-120 mesh; The design of the frosted layer in the utility model greatly increases the surface area of the adhesive film. This structure effectively reduces the ready-made adhesion of the film and the film when it is stacked and rolled, and greatly improves the separation performance of the adhesive film. During use, it is relatively rough. The surface area also provides a good separation effect, which is conducive to the mutual lamination and correction of solar cell modules during packaging, so that the adhesive film is more likely to be heated and evenly adsorbed, and it is not easy to be deformed and dislocated, resulting in air bubbles and displacement.

Description

A frosted EVA film

technical field

The utility model relates to the technical field of adhesive films, in particular to a frosted EVA adhesive film.

Background technique

The adhesive film in the prior art is a kind of hot-melt adhesive, which can well fill and seal the gap formed between the package such as silicon-based solar cells and welded solar cells and glass or backplane, and the adhesive film is heated and melted. , It melts into a viscous fluid state at 50 ° C ~ 100 ° C, flows and fills around under a certain pressure, and can completely replace the original gap under the auxiliary vacuum condition to complete the package.

The traditional adhesive film is a light film or a pyramid structure. The surface of the light film is smooth and easy to bond between the films. Therefore, it is often necessary to use a release paper to separate it. In the use of light film and materials with insufficient surface roughness, such as batteries The sheet and the back are easy to absorb or adhere, causing the arrangement to be out of shape. The adhesive film developed to the second generation is a surface pyramid-shaped adhesive film. This type of adhesive film increases the surface area and improves the separation. However, due to the large amount of air contained, it is easy to cause the exhaust to be unclean. It is easy to move out of shape when pressed down.

Chinese patent 200920319218.8 discloses a frosted film, including a film with a frosted layer on the film, the film and the frosted layer are integrated, which solves the problem of dirty exhaust and easy deformation under external pressure Mobile technology is deficient, but could be improved.

Contents of the invention

The technical problem to be solved by the utility model is: to overcome the deficiencies in the prior art and provide a frosted EVA film with good separation performance and not easy to deform and move under external pressure.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is as follows:

A kind of frosted EVA film, comprising first transparent EVA film layer, glass fiber layer, white EVA film layer, second transparent EVA film layer successively from top to bottom, and adopts hot-pressing method to bond between above-mentioned each layer , the upper and lower ends of the EVA film have a frosted layer respectively, the depth of the frosted layer is 30-60 μm, and the frosted particles of the frosted layer are 100-120 mesh.

Further, the surface where the glass fiber layer is attached to the white EVA film layer has embossed lines, and the surface where the white EVA film layer is attached to the glass fiber layer has concave lines that match the embossed lines.

Further, the thickness of the glass fiber layer is 80-100 μm.

Further, the thickness of the white EVA film layer is 100-120 μm.

Further, the depth of the frosted layer is 50 μm, and the frosted particles of the frosted layer are 120 mesh.

Further, the depth of the frosted layer is 60 μm, and the frosted particles of the frosted layer are 100 mesh.

Further, the thickness of the EVA film is 0.8-1.2mm.

The beneficial effects of adopting the technical solution of the utility model are:

1. The design of the frosted layer in the utility model greatly increases the surface area of the adhesive film. This structure effectively reduces the ready-made adhesion when the film is stacked and rolled, and greatly improves the separation performance of the adhesive film. During use, The rougher surface area also provides a good separation effect, which is conducive to the mutual lamination and correction of the solar cell module packaging, so that the adhesive film is easier to be heated and adsorbed evenly, and it is not easy to deform and misalign, resulting in air bubbles and displacement;

2. The depth of the frosted layer in the utility model is 30-60 μm, and the frosted particles of the frosted layer are 100-120 mesh; the depth and particle size of the frosted layer are controlled within this range, on the one hand, the roughness of the film surface can be effectively controlled On the other hand, it can ensure the excellent performance of the EVA film.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the structural representation of glass fiber layer and white EVA film layer in the utility model.

In the figure: 1 first transparent EVA film layer, 2 glass fiber layer, 3 white EVA film layer, 4 second transparent EVA film layer, 5 embossed lines, 6 concave lines.

detailed description

Now in conjunction with accompanying drawing, the utility model is described in further detail. These drawings are all simplified schematic diagrams, and only schematically illustrate the basic structure of the utility model, so they only show the configurations related to the utility model.

As shown in Figure 1, a kind of frosted EVA adhesive film, comprises first transparent EVA adhesive film layer 1, glass fiber layer 2, white EVA adhesive film layer 3, the second transparent EVA adhesive film layer 4 successively from top to bottom, here The structural design can ensure good adhesion between EVA and the battery sheet and the back plate while increasing the reflectivity; the above layers are bonded by hot pressing, and the bonding effect is good, which can effectively ensure the frosted EVA film quality; the upper and lower ends of the EVA film have frosted layers respectively, and the design of the frosted layer greatly increases the surface area of the film. The separation performance of the adhesive film is improved. In the process of use, the rougher surface area also provides a good separation effect, which is conducive to the mutual stacking and correction of the solar cell module packaging. The treatment of the frosted layer effectively reduces the false thickness of the adhesive film. height, so that the adhesive film is more likely to be heated and evenly adsorbed, and it is not easy to lose shape and dislocation, resulting in air bubbles and displacement; the depth of the frosted layer is 30-60 μm, and the frosted particles of the frosted layer are 100-120 mesh; Controlling the depth and particle size within this range can effectively control the roughness of the film surface on the one hand, and ensure the excellent performance of the EVA film on the other hand.

Preferably, as shown in Figure 2, there are embossments 5 on the surface where the glass fiber layer 2 and the white EVA film layer 3 are bonded, and the white EVA film layer 3 is bonded to the glass fiber layer 2. There are concave grooves 6 that match the convex grooves 5; this structure can effectively improve the bonding effect between the film layers and improve the performance of the EVA film.

Preferably, the thickness of the glass fiber layer 2 is 80-100 μm; controlling the thickness of the glass fiber layer 2 within this range can effectively improve the performance of the EVA adhesive film, and the thickness of the glass fiber layer 2 in the utility model is preferably 100 μm, others such as 85 μm, 90 μm, and 95 μm also fall within the protection scope of the present invention.

Preferably, the thickness of the white EVA film layer 3 is 100-120 μm; the thickness of the white EVA film layer 3 is controlled within this range, which can effectively improve the performance of the EVA film. The thickness of the film layer 3 is preferably 100 μm, and other thicknesses such as 110 μm and 115 μm also fall within the protection scope of the present invention.

Preferably, the depth of the frosted layer is 50 μm, the frosted particles of the frosted layer are 120 mesh, the depth of the frosted layer and the size of the frosted particles of the frosted layer are controlled within this range, the exhaust is clean, and it is not easy to walk under external pressure. Shape moves.

Preferably, the depth of the frosted layer is 60 μm, and the frosted particles of the frosted layer are 100 meshes. The depth of the frosted layer and the size of the frosted particles of the frosted layer are controlled within this range, the exhaust is clean, and it is not easy to walk under external pressure. Shape moves.

Preferably, the thickness of the EVA film is 0.8-1.2mm, if the thickness of the EVA film is controlled within this range, the performance of the EVA film is good.

Inspired by the above ideal embodiment according to the utility model, through the above description content, relevant staff can completely make various changes and modifications within the scope of not deviating from the technical idea of the utility model. The technical scope of this utility model is not limited to the content in the description, but must be determined according to the scope of the claims.

Claims (7)

1. a frosted EVA adhesive film, it is characterized in that: include the first transparent EVA adhesive film, glass layer, white EVA adhesive film layer, the second transparent EVA adhesive film from top to bottom successively, pressure sintering bonding is adopted between above layers, the both ends of the surface up and down of described EVA adhesive film have frosted layer respectively, the degree of depth of described frosted layer is 30-60 μm, and the frosted granule of described frosted layer is 100-120 order。

2. a kind of frosted EVA adhesive film according to claim 1, it is characterised in that: the face that described glass layer and white EVA adhesive film laminating close has burr, there is the dimpled grain matched with burr in described white EVA adhesive film layer and the face of glass layer laminating。

3. a kind of frosted EVA adhesive film according to claim 1, it is characterised in that: the thickness of described glass layer is 80-100 μm。

4. a kind of frosted EVA adhesive film according to claim 1, it is characterised in that: the thickness of described white EVA adhesive film layer is 100-120 μm。

5. a kind of frosted EVA adhesive film according to claim 1, it is characterised in that: the degree of depth of described frosted layer is 50 μm, and the frosted granule of described frosted layer is 120 orders。

6. a kind of frosted EVA adhesive film according to claim 1, it is characterised in that: the degree of depth of described frosted layer is 60 μm, and the frosted granule of described frosted layer is 100 orders。

7. a kind of frosted EVA adhesive film according to claim 1, it is characterised in that: the thickness of described EVA adhesive film is 0.8-1.2mm。