KR20130135522A - Back sheet for a solarcell module and preparing process thereof - Google Patents
Back sheet for a solarcell module and preparing process thereof Download PDFInfo
- Publication number
- KR20130135522A KR20130135522A KR1020120059150A KR20120059150A KR20130135522A KR 20130135522 A KR20130135522 A KR 20130135522A KR 1020120059150 A KR1020120059150 A KR 1020120059150A KR 20120059150 A KR20120059150 A KR 20120059150A KR 20130135522 A KR20130135522 A KR 20130135522A
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- South Korea
- Prior art keywords
- solar cell
- backsheet
- spherical
- stability
- inorganic
- Prior art date
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- 238000000034 method Methods 0.000 title claims description 13
- 239000000516 sunscreening agent Substances 0.000 claims abstract description 28
- 230000000475 sunscreen effect Effects 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 238000010030 laminating Methods 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims description 16
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 15
- -1 polyacrylic Polymers 0.000 claims description 15
- 230000004888 barrier function Effects 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 229920000642 polymer Polymers 0.000 claims description 9
- 239000002952 polymeric resin Substances 0.000 claims description 7
- 229920003002 synthetic resin Polymers 0.000 claims description 7
- 229920000728 polyester Polymers 0.000 claims description 6
- 229920002620 polyvinyl fluoride Polymers 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 239000012798 spherical particle Substances 0.000 claims description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 2
- 239000001023 inorganic pigment Substances 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract description 14
- 230000007774 longterm Effects 0.000 abstract description 10
- 230000006866 deterioration Effects 0.000 abstract description 5
- 229920006254 polymer film Polymers 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 29
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 21
- 239000011247 coating layer Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 150000001875 compounds Chemical class 0.000 description 11
- 239000012754 barrier agent Substances 0.000 description 9
- 239000003085 diluting agent Substances 0.000 description 7
- 239000003973 paint Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229920006267 polyester film Polymers 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000002981 blocking agent Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
- H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
- H01L31/049—Protective back sheets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
- Laminated Bodies (AREA)
Abstract
In order to completely protect the solar cell back sheet from ultraviolet rays, all the ultraviolet wavelengths incident by laminating a resin layer using a concentration gradient according to the particle size of the inorganic sunscreen material or a heterogeneous spherical form and a plate form are laminated to the outermost portion. It relates to a solar cell back sheet and a method of manufacturing the same, which is ensured long-term stability through the complete blocking in the above, the above-described solar cell back sheet with improved UV stability of the present invention has a structure in which the laminated inorganic and sunscreen inorganic sheet It is characterized by.
The solar cell backsheet having the improved UV stability of the present invention configured as described above completely blocks ultraviolet rays incident from the outside, thereby ensuring long-term stability of the polymer film layer in the backsheet, thereby facilitating the passage of harsh tests as well as in the field. Even when using, it can solve the problem of deterioration of backsheet material, so it can maintain long-term stability and safety of solar cell.
Description
The present invention relates to a solar cell back sheet and a method of manufacturing the same, which has greatly improved UV stability, and more particularly, to a concentration gradient according to the particle size of an inorganic sunscreen material in the outermost part to completely protect the solar cell back sheet from ultraviolet rays. Another aspect of the present invention relates to a solar cell backsheet and a method of manufacturing the same, which have long-term stability through complete blocking at all incident ultraviolet wavelengths by laminating a resin layer using a spherical and plate-like heteromorphic form.
In recent years, solar cells using the sun have recently come into the spotlight because they are energy-free, environmentally friendly, which overcome the exhaustion of limited energy resources and do not cause environmental pollution. A battery module is a semiconductor device that converts light energy into electrical energy by using a photoelectric effect. It is a key material in the use of solar cells. In general, the backsheet used for the module of such a solar cell has a mechanical strength as well as moisture. It must have the ability to protect the device from external factors such as oxygen, chemicals, dust and ultraviolet light, and a lighter and thinner structure is preferred in terms of device efficiency.
Therefore, as a material capable of satisfying the requirements for use as such a backsheet, a sheet derived from a polymer is known to be the most suitable until now, and in practice, a polymer is commonly used for most backsheet components. However, one polymer alone has not been able to fully satisfy these various requirements as a backsheet, so traditionally the backsheet has a multi-layered structure of materials that give it a unique role. The backsheet of such a multilayer structure generally has a structure in which a weather resistant film is grounded on the outer side of the hydrolysis resistant barrier layer and an electrical insulation layer is grounded on the cell side.
Polyester used as the barrier layer of the backsheet has been the most widely used due to the advantages such as mechanical properties and economic efficiency. However, by itself, not only does not exhibit sufficient water resistance required for the protection of the cell, but also lacks a function such as weather resistance, there is a problem in that it requires a different sheet or film up and down to compensate for this.
As a weather resistant film for supplementing the weather resistance of the back sheet barrier layer, a polyvinyl fluoride (PVF) sheet, which is a fluorine-containing sheet, has been widely used after being adhered to the barrier layer. However, the sheet is not only placed in the basic requirements of the solar cell module, which requires a thickness of at least 20 micro or more in order to give a certain function, but also the lack of a stable supply and expensive to meet the growing demand There are disadvantages.
In addition, in recent years, the reliability evaluation of materials used in solar cell modules is becoming more and more stringent. Therefore, it is essential to pass various weather resistance harshness tests for commercial application of the backsheet. Particularly, polymer materials such as polyester used in solar cell backsheets are generally vulnerable to UV rays, so if exposed to sunlight for a long time directly, the durability of the material is not only reduced, but also due to degradation products of polymer materials due to deterioration. Being vulnerable to back can cause big problems in safety. Therefore, the backsheet that is directly exposed to sunlight can pass the harsh test only after a certain degree of stability, in particular, elongation, is maintained even after prolonged ultraviolet irradiation. Currently, in order to protect the backsheet from ultraviolet rays, a method of forming a coating layer by mixing a specific type of organic-inorganic sunscreen agent with a resin layer is generally used as shown in Patent Document 1, but it may not exhibit sufficient blocking effect under severe conditions. There is a problem of discoloration. Another method is to mix and use an organic-inorganic sunscreen at the time of film forming of the film used. However, this has a problem that it is difficult to obtain a definite effect because there are many restrictions on the type and the amount of the sunscreen used.
As described above, the backsheet used in the conventional solar cell has been proposed to secure the long-term UV stability inherently, but the situation has not been presented so far.
On the other hand, EP 2,315,260 discloses a backsheet used for solar cells. However, in the above-described conventional technique, the ultraviolet rays incident on the backsheet for silicon solar cells should be completely blocked at the outermost blocking layer, but the blocking effect is not sufficient, so that some ultraviolet rays, especially light in the long wavelength region, are transmitted inside. It causes the deterioration of the polymer component, and this deterioration causes a serious problem in durability, and the situation is urgently required for a solution.
Accordingly, the present invention has been made in view of the above-described conventional technology. The main purpose of the present invention is that TiO 2 which is generally used as a blocking agent should be completely shielded from the outermost blocking layer in the ultraviolet ray incident on the backsheet for a silicon solar cell. Inorganic blockers such as ZnO are not used sufficiently, and the distance between particles is not sufficient, so the effect is not sufficient, so that some ultraviolet rays, especially light in the long wavelength region, penetrate the inside and cause degradation of the polymer component. In particular, in evaluating the weather resistance of the backsheet, a method of irradiating a large amount of ultraviolet light of 15-30 kW or more in a short time has been used, and the degradation of the backsheet polymer layer caused by transmitted ultraviolet rays has solved a problem of serious durability. Long-term protection through complete blocking at all incident UV wavelengths To provide a crystalline solar cell backsheet is secured.
Another object of the present invention is to provide a method for more easily manufacturing a solar cell back sheet having a long-term stability having the above excellent characteristics.
The present invention may also be directed to accomplishing other objects that can be easily derived by those skilled in the art from the overall description of the present specification, other than the above-described and obvious objects.
The object of the present invention is to avoid the use of the organic barrier agent in order to solve the low UV stability of the conventional solar cell backsheet, and to introduce the concentration gradient according to the particle size of the inorganic barrier agent in the outermost layer or of the spherical or plate-shaped particles It was achieved by revealing that it is possible to provide a more reliable UV blocking effect by blocking the ultraviolet rays transmitted into the backsheet through the mixed use.
Solar cell back sheet with improved ultraviolet stability of the present invention for achieving the above object;
It is characterized by having a structure in which a spherical and plate-shaped inorganic sunscreen agent is laminated.
According to another configuration of the present invention, the spherical inorganic sunscreen is characterized in that the spherical particles having a different diameter.
According to another configuration of the present invention, the inorganic sunscreen is characterized in that at least one selected from TiO 2 , ZnO, SiO 2 , Al 2 O 3 .
According to another configuration of the present invention, the spherical inorganic sunscreen is characterized in that to use a material having a diameter of 10nm to 100um to select two kinds of difference in diameter as necessary.
According to another configuration of the present invention, the plate-shaped inorganic sunscreen is characterized in that it uses a material with a long axis and a short axis of 50nm to 50um.
According to another configuration of the present invention, the spherical inorganic sunscreen is a particle having a diameter d of 10nm to 100um, in the case of a plate-shaped long axis l and a short axis w of 50nm to 150um, the thickness h of 10nm to 10um In this case, each dimension is characterized by using the following condition (1).
d / 2 <l, w <2d ---- (1)
According to another configuration of the present invention, the inorganic sunscreen is used a spherical blocker particles having a diameter d1 of 10 to 100nm and a spherical blocker having a diameter d2 of 1 to 200um, wherein the spherical inorganic having a diameter d1 It is characterized in that the pigment particles are introduced to the surface of the backsheet in a thickness of 1 to 10um, and then the spherical blocker having a diameter d2 is laminated again to a thickness of 1 to 20um on the stacked barriers.
According to another configuration of the present invention, the inorganic sunscreen agent is a polymer resin such as polyester, polyacrylic, polyurethane, polyamide, polyethylene, polypropylene, polyethylene tetrafluoroethylene, polyvinyl fluoride, polyvinyl difluoride It is characterized by containing 1 to 30 parts by weight relative to.
Method for producing a solar cell back sheet improved UV stability of the present invention for achieving the above another object;
In the method of manufacturing a solar cell backsheet, the method comprises mixing a spherical and plate-shaped inorganic sunscreen agent with another additive such as a binder or a curing agent together with a polymer resin and laminating it through coating on the same or different polymer layers through coating. Characterized in that it comprises the step of forming.
The solar cell backsheet having the improved UV stability of the present invention configured as described above completely blocks ultraviolet rays incident from the outside, thereby ensuring long-term stability of the polymer film layer in the backsheet, thereby facilitating the passage of harsh tests as well as in the field. Even when using, it can solve the problem of deterioration of backsheet material, so it can maintain long-term stability and safety of solar cell.
EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail by preferable embodiment.
In order to achieve the above object, a solar cell backsheet containing a concentration-graded or heterologous blocker of the present invention is composed of a single layer or a multilayer polymer resin layer containing an inorganic blocker.
Concentration gradients in the backsheets containing the concentration gradient or heterologous pigments proposed by the present invention are an effective way to completely block ultraviolet light. First, it is necessary to introduce spherical blocker particles having a diameter d1 of 10 to 100 nm to the surface of the polymer for backsheets at a thickness of 1 to 10 um, preferably at a thickness of 2 to 5 um. Subsequently, the necessary barrier layer may be formed by re-stacking the spherical barrier agent having a diameter d2 of 1 to 200 μm on the laminated barrier agent to a thickness of 1 to 20 μm, preferably 2 to 10 μm.
The introduction of the inorganic barrier agent can be made to contain a sufficient amount of the barrier through the method of coating the film or resin layer and the polymer resin layer or film may be polyester, polyacryl, polyurethane, polyamide, polyethylene, polypropylene, Polyethylenetetrafluoroethylene, polyvinylfluoride, polyvinyldifluoride and the like, and may be composed of a homogeneous or heterogeneous stack.
Even if the layers having different diameters are laminated in a different order, the UV blocking effect can be obtained, but the effect is reduced compared to the opposite case. In addition, the method of forming a resin layer by coating a single coating by mixing two materials having different diameters is economically advantageous, but it is difficult to evenly arrange the particles sufficiently, thereby reducing the blocking effect. In order to achieve the same barrier effect with a single coating, a much larger amount of barrier agent must be used, which is not advantageous in this case.
The film in which the barrier agent is laminated with a resin layer may be used as a back sheet or laminated with a film of the same or different types.
The use of heterologous blockers in a backsheet containing the concentration gradient or heterologous pigments proposed by the present invention is another effective way to completely block ultraviolet light. The heterogeneous form in the above means basically using a plate-shaped blocker while using a spherical inorganic blocker. By using the spherical form and the plate form together, the lamination of the blocking agent becomes dense, and the ultraviolet ray is prevented from penetrating into the inside, thereby obtaining a more reliable ultraviolet blocking effect. Lamination of the spherical and plate-shaped can proceed sequentially or a mixture of the two can be laminated at once, but in consideration of economics it is preferable to stack at once. In this case, the sphere may absorb ultraviolet rays and scatter, and the plate may mainly block ultraviolet rays through scattering.
The spherical and plate-shaped inorganic blockers include TiO 2 , ZnO, SiO 2 , Al 2 O 3 In the case of spherical particles, particles having a diameter d of 10 nm to 100 um can be used. In the case of plate-shaped particles, particles having a long axis l and a short axis w having a length of 50 nm to 150 um and a thickness h of 10 nm to 10 um are used. The diameter d of satisfying the following condition can be preferably used.
d / 2 <l, w <2d
If the long axis and the short axis are smaller than the radius d / 2 of the spherical particles, the arrangement of the particles may not be effective, and thus the UV blocking effect may be reduced. If the length and the short axis are larger than 2d, the surface of the resin layer is rough, which is not preferable.
The introduction of the inorganic barrier agent may be mixed with the resin and the additive and then contain a sufficient amount of the barrier agent through the coating method, and the polymer resin layer may be polyester, polyacryl, polyurethane, polyamide, polyethylene, poly It may be selected from propylene, polyethylene tetrafluoroethylene, polyvinyl fluoride, polyvinyl difluoride and the like and the thickness is preferably 1 to 10um. If it is lower than 1um, it is difficult to obtain a sufficient blocking effect. If it is larger than 10um, the process is difficult and economically undesirable.
As a method of forming a coating layer by mixing with a resin and an additive, a gravure coater, a comma coater, a slit die coater, a lip coater, etc. may be used, and a person skilled in the art may form a resin layer without great difficulty. .
It is preferable to use the spherical and plate-shaped blockers used in the resin layer coating in a ratio of 1: 1 to 2.5. If the ratio is lower than 1, there is a problem that the UV protection ability of the long wavelength region is inferior, and when used more than 2.5, there is a problem in the formulation and the formation of a stable coating film is not preferable.
Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but it goes without saying that the scope of the present invention is not limited to these Examples.
Example 1
20 parts by weight of a spherical TiO 2 compound having an average diameter of 15 nm, 100 parts by weight of a polyacrylic coating agent (BK1, Nippon Shokubai Co., Ltd.), 5 parts by weight of a curing agent (DesModule N3200, Sumika Bayer) and a diluent A coating layer paint prepared by stirring with 140 parts by weight of ethyl acetate was applied to a polyester film (100 mm, X10S, Toray) with a thickness of 2 μm using a gravure coater to form a coating layer through drying. 20 parts by weight of a TiO 2 compound having an average diameter of 5 um to 100 parts by weight of a polyacrylic coating agent (BK1, Nippon Shokubai Co., Ltd.) on the resin layer, and 5 parts by weight of a curing agent (DesModule N3200, Sumica Bayer) And a coating layer paint prepared by stirring with 140 parts by weight of ethyl acetate as a diluent using a gravure coater to form a coating layer with a thickness of 7㎛ to prepare a solar cell back sheet.
Example 2
20 parts by weight of a spherical TiO 2 compound having an average diameter of 5 μm in 100 parts by weight of a polyacrylic coating agent (BK1, Nippon Shokubai Co., Ltd.), 5 parts by weight of a curing agent (DesModule N3200, Sumica Bayer) and a diluent The coating layer paint prepared by stirring with 140 parts by weight of ethyl acetate was applied to a polyester film (100 mm, X10S, Toray) with a thickness of 7 μm using a gravure coater to form a coating layer through drying. 20 parts by weight of a plate-shaped TiO 2 compound having an average length of 10 µm and a length of 1 µm and a thickness of 1 μm on a polyacrylic coating agent (BK1, Nippon Shokubai Co., Ltd.) on a resin layer, and a curing agent (Des) The coating layer paint prepared by stirring with 5 parts by weight of module N3200, Smica Baiel Co., Ltd. and 140 parts by weight of ethyl acetate as a diluent was formed using a gravure coater to form a coating layer having a thickness of 2 μm to prepare a solar cell backsheet.
Example 3
Polyacryl coating agent (BK1, Nippon Shokubai Co., Ltd.) 100 parts by weight of 20 parts by weight of a plate-shaped TiO 2 compound having an average length of 10 µm and a length of 1 µm and a thickness of 1 µm, a curing agent (Desmodul N3200, Sumika) Bayer Co.) 5 parts by weight and a coating layer paint prepared by stirring with 140 parts by weight of ethyl acetate as a diluent was applied to the polyester film (100 mm, X10S, Toray) to a thickness of 2㎛ using a gravure coater and dried A layer was formed. 20 parts by weight of a TiO 2 compound having an average diameter of 5 μm in 100 parts by weight of a polyacrylic coating agent (BK1, Nippon Shokubai Co., Ltd.) on the resin layer, and 5 parts by weight of a curing agent (Desmodul N3200, Smica Baiel Corporation). The coating layer paint prepared by stirring with 140 parts by weight of ethyl acetate as a part and a diluent was formed using a gravure coater to form a coating layer having a thickness of 7 μm to prepare a solar cell backsheet.
Example 4
10 parts by weight of a spherical TiO 2 compound having an average diameter of 5 μm, 100 parts by weight of a polyacrylic coating agent (BK1, Nippon Shokubai Co., Ltd.), an average length of long and short axes of 10 μm, and a thickness of 1 μm. 10 parts by weight of a plate-shaped TiO 2 compound, 5 parts by weight of a curing agent (Desmod N3200, Smica Bayer) and 140 parts by weight of ethyl acetate as a diluent were coated with a gravure coater to form a polyester film with a thickness of 5 μm. (100 mm, X10S, Toray) and coated to form a coating layer to prepare a solar cell backsheet.
Comparative Example 1
A solar cell backsheet was manufactured in the same manner as in Example 1, except that only a spherical TiO 2 compound having an average diameter of 15 nm was used as a sunscreen.
Comparative Example 2
A solar cell backsheet was manufactured in the same manner as in Example 1, except that only a spherical TiO 2 compound having an average diameter of 5 μm was used as a sunscreen.
Comparative Example 3
A solar cell backsheet was manufactured in the same manner as in Example 1, except that only a plate-shaped TiO 2 compound having an average length of 10 μm and a length of 1 μm was used as the sunscreen.
Experimental Example 1
In order to test the stability of the backsheet prepared in each of the above Examples and Comparative Examples to the ultraviolet ray ultraviolet tester Eye Super (IWASAKI Co., Ltd.) by measuring the intensity change rate of the backsheet according to the irradiation dose and the results are shown in Table 1 Shown in
Experimental Example 2
In order to test the stability of the backsheet fabricated in each of the above Examples and Comparative Examples using a xenon lamp (0.35 W / m 2 at 340nm) by measuring the intensity change rate of the backsheet after ultraviolet irradiation for 1000 hours The results are shown in Table 2 below.
Retention rate (%)
As can be seen from the results of the above experimental example, the UV penetration of all incident wavelength ranges is introduced by stacking the inorganic sunscreens of the spherical and plate-like heterogeneous forms according to the present invention or introducing a concentration gradient layer due to the difference in particle diameter. As it can be blocked, it is possible to secure the stability of the backsheet even during long-term use in the field as well as UV harshness test.
Claims (9)
d / 2 <l, w <2d ---- formula (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020120059150A KR20130135522A (en) | 2012-06-01 | 2012-06-01 | Back sheet for a solarcell module and preparing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020120059150A KR20130135522A (en) | 2012-06-01 | 2012-06-01 | Back sheet for a solarcell module and preparing process thereof |
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| Publication Number | Publication Date |
|---|---|
| KR20130135522A true KR20130135522A (en) | 2013-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020120059150A KR20130135522A (en) | 2012-06-01 | 2012-06-01 | Back sheet for a solarcell module and preparing process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110113002A (en) * | 2018-03-30 | 2019-08-09 | 康维明工程薄膜（张家港）有限公司 | A kind of photovoltaic back bonding plane UV resistance test method |
-
2012
- 2012-06-01 KR KR1020120059150A patent/KR20130135522A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110113002A (en) * | 2018-03-30 | 2019-08-09 | 康维明工程薄膜（张家港）有限公司 | A kind of photovoltaic back bonding plane UV resistance test method |
| CN110113002B (en) * | 2018-03-30 | 2020-08-04 | 康维明工程薄膜（张家港）有限公司 | Method for testing ultraviolet resistance of bonding surface of photovoltaic back plate |
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