CN218827168U

CN218827168U - High-barrier weather-resistant solar cell front panel

Info

Publication number: CN218827168U
Application number: CN202223152150.3U
Authority: CN
Inventors: 吴培服; 吴迪; 孙化斌; 臧辉; 张迪
Original assignee: Jiangsu Shuangxing Color Plastic New Materials Co Ltd
Current assignee: Jiangsu Shuangxing Color Plastic New Materials Co Ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-04-07
Anticipated expiration: 2032-11-25

Abstract

The application discloses high resistant separates resistant time solar cell front bezel, including the resistant time membrane in the outside and the inboard support base film, resistant time membrane with support the base film between bond linkage as an organic whole, resistant time membrane comprises the main part by PVDF, the both sides surface of resistant time membrane is formed with a plurality of equidistant parallel arrangement's cross-section and is isosceles triangle's sawtooth strip, and the surface of sawtooth strip is formed with one deck protective layer through vacuum sputtering, the sawtooth strip mutually perpendicular setting on the both sides surface of resistant time membrane. The utility model provides a high resistant weatherproof solar cell front bezel's of separating is resistant to weather sawtooth stripe that the membrane set up through its surface, can increase the area of contact with the adhesive to increase the whole adhesive force of resistant to weather membrane, avoided the easy problem of delaminating of resistant to weather membrane.

Description

High-barrier weather-resistant solar cell front panel

Technical Field

The application relates to a high-barrier weather-resistant solar cell front panel.

Background

CN 102019734A discloses a protective film and a front plate for solar cells, the protective film having high transparency, high ultraviolet absorption capacity, high weather resistance and flexibility, and the coating layer thereof is not peeled off from a plastic film even when irradiated with ultraviolet rays. The protective film includes a plastic film and a coating layer on a surface of the plastic film. The main concern of this prior art solar cell front sheet is its uv absorbing ability, lack of sufficient barrier and weatherability.

CN 115179631A is an encapsulating material and photovoltaic module. The packaging material comprises a fluorine-containing plastic film and a water blocking film, wherein the fluorine-containing plastic film and the water blocking film are connected through a weather-resistant pressure-sensitive adhesive layer, and a wear-resistant water blocking layer is arranged on the surface of one side of the fluorine-containing plastic film, which is far away from the water blocking film; wherein the fluorine-containing plastic film is subjected to low-pressure low-temperature plasma surface treatment; the raw materials of the weather-resistant pressure-sensitive adhesive layer comprise acrylate pressure-sensitive adhesive, liquid ultraviolet absorbent combination and solid ultraviolet absorbent combination. The fluorine-containing plastic film adopted by the front plate packaging material in the prior art has the characteristics of high water permeability, poor wear resistance, low surface energy, easiness in delamination, easiness in dust adsorption and the like, and risks such as reduction of power generation power of the component, delamination and the like can occur after the front plate packaging material is used outdoors for a period of time. In the prior art, in order to avoid the problems of water absorption and wear resistance of the fluorine-containing plastic film, a water-blocking film is additionally arranged, but the weather resistance of the water-blocking film is weaker than that of the fluorine-containing plastic film, and the water-blocking film becomes brittle and cracks before the fluorine-containing plastic film, so that the defects of the fluorine-containing plastic film cannot be fundamentally overcome.

CN 108091715A discloses a composite film for a solar cell front plate, which comprises a support layer and a PVDF coating coated on the support layer, wherein the PVDF coating is sprayed on the surface of the support layer as a weather-resistant layer.

CN 102019734A discloses a protective film comprising a plastic film and a coating layer on a surface of the plastic film, wherein the coating layer comprises a binder and core-shell type zinc oxide particles dispersed in the binder. This prior art improves light transmittance and weather resistance by the coating layer on the outer side. The weather-resistant coating of the front plate in the prior art is too thin and is positioned at the outermost side of the front plate, so that the front plate is difficult to resist the erosion of wind and sand for a long time, and the wind, sand and dust are easy to scratch the surface to reduce the light transmittance.

Disclosure of Invention

The technical problem to be solved by the present application is to provide a high-barrier weatherproof solar cell front panel to reduce or avoid the aforementioned problems.

For solving above-mentioned technical problem, the application provides a high resistant separates resistant solar cell front bezel, including the resistant time membrane in the outside and the inboard support base film, resistant time membrane with support between the base film bond as an organic wholely through the adhesive linkage, wherein, resistant time membrane comprises PVDF for the main part, the both sides surface of resistant time membrane is formed with a plurality of equidistant parallel arrangement's cross-section and is isosceles triangle's sawtooth stripe, and the surface of sawtooth stripe is formed with the one deck protective layer through vacuum sputtering, the sawtooth stripe mutually perpendicular on the both sides surface of resistant time membrane sets up, the length direction of sawtooth stripe is 45 degrees with the contained angle on four rectangle limits of resistant time membrane.

Preferably, the support base film comprises a base material layer, two side surfaces of the base material layer are respectively provided with an online coating layer, a barrier layer is formed on the outer side of the online coating layer in a sputtering mode, the thickness of the barrier layer is 200nm, and the thickness of the online coating layer is 0.1-0.3 μm.

Preferably, the total thickness of the front plate is 125-240 μm, the thickness of the supporting base film is 100-200 μm, the thickness of the adhesive layer is 5-10 μm, the maximum thickness of the weather-resistant film is 20-30 μm, and the thickness of the protective layer is 1-3 μm.

Preferably, the length of the base of the isosceles triangle of the sawtooth stripes is 5-10 μm, the vertex angle is 45-135 degrees, the height is 5-10 μm, and the minimum gap between adjacent sawtooth stripes is 0-5 μm.

The high resistant separates resistant time solar cell front panel's of this application resistant time membrane can increase the area of contact with the adhesive through the sawtooth stripe that its surface set up to increase resistant time membrane's whole adhesive force, avoided the easy problem of delaminating of resistant time membrane, still have extra automatically cleaning ability.

Drawings

The drawings are only for purposes of illustrating and explaining the present application and are not to be construed as limiting the scope of the present application.

Figure 1 shows a schematic cross-sectional view of a high barrier weatherable solar cell front sheet according to one embodiment of the present application.

Fig. 2 shows a schematic structural diagram of a support base film for a front sheet of a high-barrier weatherable solar cell according to an embodiment of the present application.

Figure 3 shows a schematic view of a weatherable film that can be used in the front sheet of a high barrier weatherable solar cell of the present application, according to an embodiment of the present application.

Figure 4 shows a schematic cross-sectional view of one weatherable film that can be used in the front sheet of the high barrier weatherable solar cell of the present application, according to another embodiment of the present application.

Figure 5 shows a schematic view of a weatherable film that can be used in the front sheet of a high barrier weatherable solar cell of the present application, according to yet another embodiment of the present application.

Fig. 6 and 7 show schematic front and back views, respectively, of the weatherable film of fig. 5.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present application, embodiments of the present application will now be described with reference to the accompanying drawings. Wherein like parts are given like reference numerals.

As shown in fig. 1, the present application provides a high-barrier and weather-resistant solar cell front panel, which comprises an outer weather-resistant film 1 and an inner supporting base film 2, wherein the weather-resistant film 1 and the supporting base film 2 are bonded together through an adhesive layer 3. In a specific embodiment, the total thickness of the front plate is 125-240 μm; the thickness of the weather-resistant film 1 is 20-30 μm; the thickness of the support base film 2 is 100 to 200 μm; the thickness of the adhesive layer 3 is 5 to 10 μm.

A solar cell photovoltaic module with a typical structure is composed of a front plate, a solar cell piece, an encapsulating material and a back plate. The solar cell photovoltaic module is generally applied to outdoor environment and is subjected to tests such as wind, sunlight, rain, dust, abrasion and the like, so that the performance requirement on the front plate, namely the light receiving surface, is high, and the front plate, namely the solar cell photovoltaic module needs to have high light transmittance, water resistance, UV resistance and certain mechanical strength. The main functions of the weather-resistant film 1 on the outermost side of the front panel are reinforcement, weather resistance, UV resistance, moisture resistance, low dielectric constant, high breakdown voltage, and the like. The supporting base film 2 is adjacent to the circuit side of the solar cell panel, and needs to provide a stronger barrier property to protect the internal circuit in addition to providing a stronger supporting protection function. The bonding layer 3 can adopt a conventional EVA adhesive, and can also adopt an ultraviolet light curing adhesive.

The supporting base film 2 may be made of a PET film having a visible light transmittance of more than 85%, and may have a single-layer or multi-layer structure formed by biaxial stretching. The PET film can provide excellent insulativity, water resistance, mechanical property and dimensional stabilityAnd (5) performing qualitative determination. However, for solar cells, especially for CI (G) S flexible solar cells, which are mainstream products, the requirements for front and back panels and even packaging materials are high due to the process characteristics of the solar cells, such as stronger barrier property for protecting internal circuits, and the barrier property is usually required to be 10 ^-3 g/m ² Day level. The general idea behind enhancing the barrier properties is to increase the thickness of the material, which results in increased material costs, while increasing the unit weight and decreasing the flexibility of the material, too thick a material also results in slippage leakage when the edges of the sheet are bent. The traditional packaging process in China is difficult to achieve the required barrier property, and even in Japan with the strongest packaging process, the flexible solar cell still does not reach the level of large-scale mass production, so that the cost of the traditional flexible solar cell sold in the market is high, and the actual service life of the flexible solar cell is slightly insufficient compared with that of a crystalline silicon solar cell due to the limitation of the packaging process.

In view of this, in one embodiment of the supporting base film 2 shown in fig. 2, the supporting base film 2 includes a base layer 21, an in-line coating layer 22 is provided on each of both side surfaces of the base layer 21, and a barrier layer 23 is formed by sputtering on the outer side of the in-line coating layer 22. The thickness of the base layer 21 is preferably about 100 to 200. Mu.m, and for example, it can be formed of a 188 μm biaxially oriented PET film. The barrier layer 23 is preferably composed of silicon dioxide; the thickness was 200nm.

The barrier property of the substrate layer 21 can be improved by the barrier layer 23, the thickness of the substrate layer 21 does not need to be increased, and the adaptability of the flexible solar cell is improved. In order to improve the surface smoothness and the adhesion of the barrier layer 23, it is preferable to perform an in-line coating process on both surfaces of the base material layer 21 before forming the barrier layer 23 by sputtering, and to form an in-line coating layer 22 having a thickness of preferably 0.1 to 0.3 μm on each of both sides.

On-line coating can be directly through on-line coating machine with the chemical coating on the substrate layer in the production process of substrate layer 21, and on-line coating can be directly formed in the later stage of the production process of substrate layer, need not launch the operation again with the coiled material, and the coating forms evenly, fast, efficient, and is with low costs.

In one embodiment, the primer solution constituting the in-line coating layer 22 may be applied to the slab before or during the stretching of the polyester film constituting the substrate layer 21, and then the primer solution applied to the surface of the slab is cured to form the in-line coating layer 22 at a high temperature during the stretching process as the slab is stretched to a film having a desired thickness and the thickness is reduced.

In one embodiment, the in-line coating layer 22 is formed by uniformly mixing acrylic resin, silica nanoparticles having a particle size of 5 to 10nm, 1, 4-dioxane, polyethylene oxide, and ethylene-vinyl acetate copolymer into a primer solution, and then curing by in-line coating.

Specifically, the mass ratios of the components of the online coating layer 22 are, respectively, acrylic resin: silica nanoparticles: 1, 4-dioxane: polyethylene oxide: the ethylene-vinyl acetate copolymer is 100: (10-15): (20 to 30): (10-15): (5-10). Wherein the ethylene-vinyl acetate copolymer can be ethylene-vinyl acetate copolymer which is sold by Mitsui corporation of Japan and has the trade name of Evaflex 550, and the mass percentage of the contained vinyl acetate polymer is 14 percent.

According to the weight parts of the raw materials in the following table, on-line coating layers are respectively prepared on the two side surfaces of a 188-micron biaxially oriented PET film, and then a layer of barrier layer made of silicon dioxide is respectively sputtered on the outer sides of the on-line coating layers.

	Example 1	Example 2	Example 3	Example 4	Example 5
						Acrylic resin	100	100	100	100	100
Silica nanoparticles	10	11.5	12.5	13.5	15
						1, 4-dioxane	20	22	25	28	30
Polyethylene oxide	10	12	13	14	15
						Ethylene-vinyl acetate copolymer	5	6	7.5	8	10
On-line coating layer thickness (nm)	100	150	200	250	300
						Thickness of barrier layer (nm)	200	200	200	200	200

For comparison, barrier layers of 200nm thick silica were formed by sputtering directly on both side surfaces of a 188 μm biaxially oriented PET film as comparative examples. The 180 degree peel force (N/25 mm) of the barrier layers of examples 1-5 was measured to be 34.5%, 36.2%, 35.1%, 34.8%, and 36.1% higher than the comparative examples, respectively.

Further, as for the weather-resistant film 1, PVDF (polyvinylidene fluoride) coating is used in some of the weather-resistant films of the prior art, and a fluorine-containing plastic film is used in some of them. The PVDF coating is mainly made of bonding resin, the content of the PVDF is limited, and the weather-resistant effect is not as good as that of a weather-resistant film with the PVDF as the main body. However, PVDF weatherable films have a problem of easy delamination due to low surface energy and insufficient adhesion, and further, have a problem of low abrasion resistance on the outer surface and are prone to dust adsorption.

In view of the above, the present application proposes a weatherable film 1 for the front panel of the high-barrier weatherable solar cell of the present application, as shown in fig. 3 to 5, the weatherable film 1 in this embodiment is preferably made of PVDF as a main body, wherein the mass content of PVDF in the weatherable film is greater than or equal to 90%, and in order to improve the performance thereof, an ultraviolet light absorber, an abrasion-resistant filler, etc. may be added.

Further, as shown in the figure, a plurality of equally spaced and parallel saw-tooth stripes 11 with isosceles triangle-shaped cross sections are formed on the two side surfaces of the weather-resistant film 1, and the saw-tooth stripes on the two sides of the weather-resistant film 1 are completely the same. The size scale of the weatherable film 1 is enlarged for easy observation and understanding, the actual size of the sawtooth stripes is relatively small, the surface has only small texture which is not easy to be perceived, and the whole light transmittance of the weatherable film 1 is not affected. In one embodiment, the weatherable film 1 has a maximum thickness of 20-30 μm.

The existing PVDF weather-resistant film has the problem of easy delamination when being bonded on the supporting base film 2 through an adhesive due to low surface energy and insufficient bonding force. In order to overcome the technical problem, the sawtooth stripes 11 are formed on the surface of the weather-resistant film 1, the contact area between the sawtooth stripes 11 and the adhesive layer 3 can be increased, for example, when the isosceles trapezoid of the sawtooth stripes 11 has an apex angle of 60 degrees, the sawtooth stripes 11 can double the surface area, so that the overall adhesion of the weather-resistant film 1 is increased, and the problem that the weather-resistant film 1 is easy to delaminate is avoided.

It should be noted that, in practice, only the sawtooth stripes 11 need to be arranged on the inner side of the weather-resistant film 1 to improve the overall adhesion of the weather-resistant film 1, but since the stripes are very small and difficult to observe, and for the convenience of assembly operation, the inventor chooses to form the same sawtooth stripes 11 on both surfaces of the weather-resistant film 1 at the same time, so that both sides can be coated with the film, and the application range of the weather-resistant film can be improved. The inventor thinks that the sawtooth stripes 11 originally positioned on the outer side do not assume any effect, but in the actual laying experiment process, the inventor finds that if the scale of the sawtooth stripes 11 formed on the surface of the weather-resistant film 1 is smaller than a certain range, the surface of the weather-resistant film 1 can play a self-cleaning effect, the adhesion force of dust on the surface of the weather-resistant film 1 can be reduced, and the attached dust can be easily washed away by rainwater. For example, in one embodiment, it is preferable that the isosceles triangle of the sawtooth stripe 11 has a length of a base of 5 to 10 μm, an apex angle of 45 to 135 degrees and a height of 5 to 10 μm, and a minimum gap between adjacent sawtooth stripes 11 is 0 to 5 μm. The same sawtooth stripes are formed on the two side surfaces of the weather-resistant film 1, so that the manufacturing cost can be reduced, and the sawtooth stripes in the size range are selected to obtain better bonding performance on the inner side and form excellent dust adsorption resistance on the outer side.

In addition, when the same sawtooth stripes 11 are formed on both sides, the sawtooth stripes 11 may reflect sunlight, thereby reducing the utilization rate of the solar cell. For example, after the flexible solar cell is integrated on a building, the direction of the flexible solar cell is not adjustable, when the sun deflection angle is just vertical to one side surface of the sawtooth stripe 11, a part of light can be reflected by the surface, and of course, the flexible solar cell can be avoided by adjusting the installation angle of the sawtooth stripe 11 during installation, but the installation requirement is too high, and the flexible solar cell is difficult to operate practically. In order to avoid the sawtooth stripe 11 of both sides appearing simultaneously because the installation angle is not enough and reduce the problem of sunshine utilization ratio, this application has proposed a special design, will wait to wait that sawtooth stripe 11 mutually perpendicular on the both sides surface of membrane 1 sets up to can avoid forming the problem that the reflection reduces the sunshine utilization ratio in both sides simultaneously.

In addition, the sawtooth stripes 11 on the surface of the weather-resistant film 1 can also enable incident light to converge towards the middle of the sawtooth stripes, so that the inclination angle of the light can deflect towards the direction perpendicular to the solar cell as much as possible to some extent, and the utilization rate of sunlight in an inclined state is improved. The inventor uses the prism film technology in the backlight plate in the field of liquid crystal display for reference about the principle of converging light rays by the sawtooth stripes. Since the field of operation of the applicant coincided with years of development on liquid crystal displays, the inventors were able to derive from the field of liquid crystal displays, which is very different from the field, but such cross-field derivation is not obvious to a person skilled in the art of solar cells. Because the sawtooth stripes on the two sides of the weather-resistant film are perpendicular to each other, the light rays in different directions can be corrected to a certain extent, and the direction modulation effect on the light rays can be realized under the condition that the solar altitude angle changes in different directions after the weather-resistant film is laid and installed.

Further, in order to improve the adhesion of the weather-resistant film 1 and avoid delamination, the included angle between the length direction of the sawtooth stripes 11 and the four rectangular sides of the weather-resistant film 1 is selected to be 45 degrees, as shown in fig. 5-7. In general, the solar cell panel is generally designed to be rectangular, four sides are perpendicular to each other, and if the length direction of the sawtooth stripes 11 is perpendicular to one pair of rectangular sides of the weatherable film 1, the other pair of rectangular sides will be parallel to the length direction of the sawtooth stripes 11. The longitudinal and width rigidities of the zigzag stripes 11 are different, and therefore the expansion rates are different, which causes the pair of rectangular sides of the weather-resistant film 1 to be easily warped and delaminated. The direction of this application with sawtooth stripe 11 turns to and is 45 degrees contained angles with four rectangle limits, then because the rigidity difference of the different directions that sawtooth stripe 11 arouses can tend to averagely to the proportion of four rectangle limits diffusions, therefore can avoid the problem of the 1 delaminations of resistant time membrane that arouses because setting up of sawtooth stripe 11, further improved the structural performance of resistant time membrane 1.

In order to improve the resistance of the weather-resistant film 1 against the erosion by wind and sand, in another embodiment of the present application, a protective layer 12 is formed on the surface of the sawtooth stripes 11 on the surface of the weather-resistant film 1 by vacuum sputtering, and preferably, the protective layer 12 is made of silicon dioxide and has a thickness of 1-3 μm.

Examples 6 to 11

Weatherable films were prepared according to the following parameters.

In examples 6 to 8, the included angles between the sawtooth stripes and the rectangular sides of the weatherable film were 45 degrees, and in examples 9 to 11, the included angles between the sawtooth stripes and the rectangular sides of the weatherable film were 0/90 degrees, i.e., the included angles between the sawtooth stripes and one pair of rectangular sides were 0 degree, and the included angles between the sawtooth stripes and the other pair of rectangular sides were 90 degrees.

Comparative examples 6 to 11

Comparative examples 6-11 PVDF films without jagged stripes were used as the weatherable films, with the following parameters.

	Comparative example 6	Comparative example 7	Comparative example 8	Comparative example 9	Comparative example 10	Comparative example 11
							Thickness of μm	20	22	24	26	28	30

The weatherable films of examples 6 to 11 and comparative examples 6 to 11 were respectively adhered to the surface of a 188 μm PET support base film, and the parametric properties of the examples in which the weatherable film was measured were compared as follows.

It can be seen through the performance parameter contrast of above-mentioned embodiment that the resistant membrane of waiting of high resistant separates resistant solar cell front bezel that can be used to this application can show promotion adhesion property and avoid the layering under the condition that has the sawtooth stripe, can improve the luminousness of oblique light simultaneously, can increase the contact angle of surface simultaneously, has improved automatically cleaning ability, possesses excellent anti dust adsorptivity.

The method for preparing the high-barrier weatherable solar cell front sheet according to the present invention will be described in further detail with reference to the accompanying drawings. As described above, the high-barrier weatherable solar cell front panel of the present application includes the weatherable film 1 on the outer side and the supporting base film 2 on the inner side, and the weatherable film 1 and the supporting base film 2 are bonded together by the bonding layer 3; the weather-resistant film 1 is composed of a PVDF (polyvinylidene fluoride) as a main body, a plurality of saw tooth stripes 11 which are arranged in parallel at equal intervals and have isosceles triangle-shaped sections are formed on the surfaces of two sides of the weather-resistant film 1, a protective layer 12 is formed on the surface of each saw tooth stripe 11 through vacuum sputtering, and the saw tooth stripes 11 on the surfaces of the two sides of the weather-resistant film 1 are perpendicular to each other.

The preparation method comprises the steps of preparing the weather-resistant film 1 and adhering the supporting base film 2 and the weather-resistant film 1. The preparation steps of the weather-resistant film 1 comprise:

first, a PVDF film composed mainly of PVDF is provided. The PVDF film can be a PVDF film with the thickness of 20-30 μm sold in the market, or a PVDF raw material particle with the mass content of more than or equal to 90 percent is added with an ultraviolet absorber, an abrasion-resistant filler and the like, and the PVDF film is formed by melt co-extrusion and then two-way stretching.

Then, a plurality of equally spaced saw-tooth stripes 11 having isosceles triangle-shaped cross sections are formed on both side surfaces of the PVDF film by hot press molding. For example, the cured zigzag stripes 11 can be obtained on the PVDF film by passing the heated PVDF film between two rollers disposed one above the other and having a pattern matching the shape of the zigzag stripes, and then air-cooling or water-cooling the PVDF film. Wherein the longitudinal directions of the patterns matching with the shape of the sawtooth stripes of the two roll surfaces which are opposite up and down are arranged perpendicular to each other, so that the sawtooth stripes 11 which are perpendicular to each other can be formed on the two side surfaces of the PVDF film. For example, the pattern direction of the two roller surfaces forms an angle of 45 degrees with the advancing direction of the PVDF film, so that the sawtooth stripes 11 forming an angle of 45 degrees with the four rectangular sides of the weather-resistant film can be formed.

Thereafter, a protective layer 4 was formed on the sawtooth stripes 11 by vacuum sputtering, thereby preparing a weather-resistant film 1. For example, a silicon dioxide layer having a thickness of 1-3 μm may be formed on the sawtooth pattern 11 by vacuum sputtering, and since the thickness of the protective layer 12 is relatively very thin, the protective layer 12 is not shown in fig. 5, and the protective layer 12 in fig. 4 is enlarged for easy understanding.

The bonding step of the support base film 2 and the weather-resistant film 1 includes: the supporting base film 2 is bonded with the weather-resistant film 1 into a whole through the bonding layer 3. The supporting base film 2 may be made of a PET film having a visible light transmittance of more than 85%, and may have a single-layer or multi-layer structure formed by biaxial stretching. In a preferred embodiment, the support base film 2 may include a substrate layer 21, an in-line coating layer 22 is formed on both surfaces of the substrate layer 21, and a barrier layer 23 is formed on the outside of the in-line coating layer 22 by sputtering.

Therefore, the production method of the present application may further include a production step of supporting base film 2, including:

the preparation method comprises the steps of taking PET chips as raw materials for preparing a PET film, obtaining a single-layer thick sheet through melt extrusion, longitudinally stretching the raw materials into a film after preheating, coating a mixture of components forming the online coating layer on one side of the film through a coating machine after longitudinally stretching, transversely stretching, sizing, cooling and rolling to form the online coating layer 22 on the surface of the film, and sputtering on the outer side of the online coating layer 22 to form a barrier layer 23 formed by silicon dioxide so as to obtain the support base film 2 with the online coating layer 22 and the barrier layer 23.

It should be appreciated by those skilled in the art that while the present application is described in terms of several embodiments, not every embodiment includes only a single embodiment. The description is thus given for clearness of understanding only, and it is to be understood that all matters in the embodiments are to be interpreted as including all technical equivalents which are encompassed by the claims and are to be interpreted as combined with each other in a different embodiment so as to cover the scope of the present application.

The above description is only illustrative of the present invention and is not intended to limit the scope of the present invention. Any equivalent alterations, modifications and combinations that may be made by those skilled in the art without departing from the spirit and principles of this application shall fall within the scope of this application.

Claims

1. The utility model provides a high resistant separates resistant time solar cell front bezel, includes the resistant time membrane in the outside and the inboard support base film, and resistant time membrane bonds as an organic wholely through the adhesive linkage between the support base film, its characterized in that, the both sides surface of resistant time membrane is formed with a plurality of equidistant parallel arrangement's cross-section for isosceles triangle's sawtooth stripe, and the surface of sawtooth stripe is formed with the one deck protective layer through vacuum sputtering, the sawtooth stripe mutually perpendicular on the both sides surface of resistant time membrane sets up, the length direction of sawtooth stripe is 45 degrees with the contained angle on four rectangle limits of resistant time membrane.

2. The front sheet of claim 1, wherein the support base film comprises a substrate layer, and an in-line coating layer is formed on both surfaces of the substrate layer, and a barrier layer is formed by sputtering on the outside of the in-line coating layer; the thickness of the barrier layer is 200nm, and the thickness of the on-line coating layer is 0.1-0.3 μm.

3. The front plate according to claim 2, wherein the front plate has a total thickness of 125 to 240 μm, a thickness of the support base film of 100 to 200 μm, a thickness of the adhesive layer of 5 to 10 μm, a maximum thickness of the weather-resistant film of 20 to 30 μm, and a thickness of the protective layer of 1 to 3 μm.

4. The front plate as claimed in claim 3, wherein the isosceles triangle of the saw-tooth stripes has a length of a base of 5-10 μm, an apex angle of 45-135 degrees and a height of 5-10 μm, and a minimum gap between adjacent saw-tooth stripes is 0-5 μm.