CN212610389U - High-reflectivity polyolefin packaging adhesive film - Google Patents
High-reflectivity polyolefin packaging adhesive film Download PDFInfo
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- CN212610389U CN212610389U CN202020549972.7U CN202020549972U CN212610389U CN 212610389 U CN212610389 U CN 212610389U CN 202020549972 U CN202020549972 U CN 202020549972U CN 212610389 U CN212610389 U CN 212610389U
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- 229920000098 polyolefin Polymers 0.000 title claims abstract description 113
- 239000002313 adhesive film Substances 0.000 title claims abstract description 107
- 238000002310 reflectometry Methods 0.000 title claims abstract description 31
- 238000004806 packaging method and process Methods 0.000 title claims description 21
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 10
- 239000008393 encapsulating agent Substances 0.000 claims description 13
- 239000012528 membrane Substances 0.000 abstract description 21
- 238000004132 cross linking Methods 0.000 abstract description 11
- 238000005538 encapsulation Methods 0.000 abstract description 9
- 238000001723 curing Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 230000037303 wrinkles Effects 0.000 abstract description 4
- 230000009977 dual effect Effects 0.000 abstract description 2
- 238000000016 photochemical curing Methods 0.000 abstract description 2
- 238000001029 thermal curing Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 80
- 230000000052 comparative effect Effects 0.000 description 6
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- Laminated Bodies (AREA)
- Photovoltaic Devices (AREA)
Abstract
The utility model discloses a high reflectivity polyolefin encapsulation glued membrane, including upper transparent polyolefin glued membrane layer and the white polyolefin glued membrane layer of lower floor, the upper transparent polyolefin glued membrane layer is the light and heat dual cure polyolefin layer. The upper adhesive film layer of the utility model adopts a photo-thermal dual-curing adhesive film layer, and the lower adhesive film layer adopts a thermosetting white polyolefin adhesive film with a high reflection effect, so that the adhesive film has good weather resistance and high reflectivity, and the power of the photovoltaic module can be effectively improved; the photovoltaic module is packaged after the upper-layer adhesive film is subjected to photocuring, the cross-linked structure of the upper-layer adhesive film can effectively solve the problems of poor appearance of the module such as white overflow, wrinkles and the like of the lower-layer white adhesive film, and the production yield of the module is improved; and finally, the crosslinking degree of the adhesive film reaches 75-90% through thermal curing, the forming effect is good, and the packaged photovoltaic module has excellent performance.
Description
Technical Field
The utility model relates to a photovoltaic module packaging material technical field especially relates to a high reflectivity polyolefin encapsulation glued membrane.
Background
Environmental pollution and energy shortage are the biggest challenges facing mankind in the 21 st century, and the conversion of clean, renewable solar energy into electrical energy by means of photovoltaic modules is one of the most effective ways to solve these two problems. At present, the photovoltaic module has low power generation efficiency and high cost, and is difficult to meet the market demand of flat-price internet surfing, so how to improve the power generation power of the module also increasingly becomes the research and development direction of the photovoltaic industry. At present, the white adhesive film is a solution with higher reliability and wider application range, and the utilization efficiency of the photovoltaic module to sunlight is increased by replacing the transparent packaging adhesive film on the back of the module with a white high-reflectivity packaging adhesive film, so that the power of the module can be improved by 1.0-2.0%, and the white high-reflectivity packaging adhesive film is widely concerned by the photovoltaic industry.
However, the white packaging adhesive film also has a lot of problems during use, and the problems are collectively expressed as poor appearance of the module, mainly reflected in phenomena of white overflow on the surface of a battery piece and the like, white adhesive film wrinkles and protruding points on the back surface of the module. The analysis from the aspect of the adhesive film is mainly that the white adhesive film and the transparent adhesive film mutually permeate to influence the appearance of the assembly due to overlarge flowability of the white adhesive film. The current solutions for solving the problem of filler blooming in white EVA (ethylene-vinyl acetate copolymer) mainly include: the combination of a white adhesive film and non-woven fabric, single-layer partial pre-crosslinking, low-melting-point adhesive film and other different schemes, but the improvement aspects all have the problems of low adhesive force, conflict between weather resistance and adhesive film reflectivity and the like, and the large-scale application of the white packaging adhesive film is seriously influenced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of prior art, the utility model aims to provide a high reflectivity polyolefin encapsulation glued membrane, the lower floor adopts the white polyolefin glued membrane of thermosetting of high reflection effect, and the upper strata glued membrane layer adopts the two solidification type of optothermal glue rete, and the weatherability of glued membrane is good, and the reflectivity is high, can effectively improve photovoltaic module power, can solve white glued membrane simultaneously and overflow to glue, the bad problem of subassembly outward appearance such as fold, improves the production yields.
The purpose of the utility model is realized by adopting the following technical scheme:
the high-reflectivity polyolefin packaging adhesive film comprises an upper transparent polyolefin adhesive film layer and a lower white polyolefin adhesive film layer, wherein the upper transparent polyolefin adhesive film layer is a photo-thermal dual-curing polyolefin layer, and the lower white polyolefin adhesive film layer is a thermosetting adhesive film layer.
Preferably, the thickness of the lower white polyolefin adhesive film layer is 0.35-0.5 mm.
Further preferably, the thickness of the lower white polyolefin adhesive film layer is 0.4-0.45 mm.
Preferably, the light reflection rate of the lower white polyolefin adhesive film layer to light with the wavelength of 400-1100nm is more than or equal to 92%.
Preferably, the melt index of the lower white polyolefin adhesive film layer is 3-16g/10 min; when the thickness is less than 0.35mm, the light reflection rate is insufficient, and when the thickness is more than 0.5mm, the wrinkles cannot be eliminated.
Preferably, the thickness of the upper transparent polyolefin adhesive film layer is 0.20-0.35 mm.
Further preferably, the thickness of the upper transparent polyolefin adhesive film layer is 0.3 mm.
The crosslinking degree of the upper transparent polyolefin adhesive film layer after being irradiated and cured by ultraviolet light is 20-30%, and the crosslinking degree after being thermally cured is 75-90%.
Specifically, the upper transparent polyolefin film layer can be subjected to photo-thermal dual curing, the crosslinking degree after being irradiated by 400W ultraviolet light for 3min is 20-30%, and the crosslinking degree after being thermally cured at 145 ℃ for 12-15min is 75-90%.
Further, the upper transparent polyolefin film layer and the lower white polyolefin film layer are integrally formed.
When the upper and lower adhesive film layers are integrally formed, no gap exists between the two adhesive film layers, and the obtained high-reflectivity polyolefin packaging adhesive film is subjected to ultraviolet illumination and then used for packaging the photovoltaic module.
Further, the upper transparent polyolefin film layer is independently formed, and a first pattern is pressed on the lower surface of the upper transparent polyolefin film layer; the lower white polyolefin film layer is independently formed, and second patterns are stamped on the upper surface of the lower white polyolefin film layer.
Preferably, the upper transparent polyolefin film layer is in press fit connection with the lower white polyolefin film layer, and the lower surface of the upper transparent polyolefin film layer is attached to the upper surface of the lower white polyolefin film layer.
When the upper and lower adhesive film layers are independently formed, the upper transparent polyolefin packaging adhesive film layer is laminated with the lower white polyolefin adhesive film layer after being irradiated by ultraviolet light and is used for packaging the photovoltaic adhesive film.
Preferably, the first pattern is regular spots, the number of the spots of the first pattern is 80-120 meshes, and the depth of the spots is 10-20 μm; the second pattern is regular spots, the number of the spots of the second pattern is 120-150 meshes, and the depth of the spots is 10-20 μm.
Here, the total depth of the upper and lower patterns is not more than 40 μm. The regular spot patterns are favorable for exhausting and eliminating air bubbles between the adhesive films during lamination.
The first patterns and the second patterns are regularly arranged, and the specific arrangement mode is not limited.
Compared with the prior art, the beneficial effects of the utility model reside in that:
(1) the utility model provides a high reflectivity polyolefin encapsulation glued membrane can effectively improve photovoltaic module power, and the weatherability of glued membrane is good, and the reflectivity is high, and does not have bad outward appearance phenomenon, long service life. Wherein, the lower layer adopts a high-reflection thermosetting white polyolefin adhesive film, and the upper adhesive film layer adopts a photo-thermal dual-curing adhesive film layer; the crosslinking degree of the upper-layer adhesive film is 20% -30% after photocuring, the photovoltaic module is packaged at the moment, and the crosslinking structure of the upper-layer adhesive film can effectively solve the problems of poor appearance such as white overflow of the lower-layer white adhesive film and the like, so that the production yield of the module is improved; and finally, the crosslinking degree of the adhesive film reaches 75-90% through thermal curing, the forming effect is good, and the packaged photovoltaic module has excellent performance.
(2) The utility model provides a two-layer polyolefin glued membrane of high reflectivity polyolefin encapsulation glued membrane both can integrated into one piece but also can independent shaping, has optimized the structural design of two-layer glued membrane, need not newly-increased production facility, and reduction in production drops into, is favorable to the large-scale production of glued membrane.
(3) The utility model discloses regular spot decorative pattern has been designed respectively to two binding faces on upper and lower glued membrane layer, and the bubble between the glued membrane when eliminating the lamination can be better the exhaust.
Drawings
FIG. 1 is a schematic structural diagram of the high-reflectivity polyolefin adhesive film of the present invention (in the figure, 1, the upper transparent polyolefin adhesive film layer; 2, the lower white polyolefin adhesive film layer).
Fig. 2 is a schematic structural view of a first pattern in embodiment 2.
Fig. 3 is a schematic structural view of a second pattern in embodiment 2.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that, in the present invention, the embodiments or technical features described below may be arbitrarily combined to form a new embodiment without conflict.
Example 1
A high-reflectivity polyolefin packaging adhesive film is shown in figure 1 and comprises an upper transparent polyolefin adhesive film layer 1 and a lower white polyolefin adhesive film layer 2; wherein, the upper layer transparent polyolefin film layer 1 is a photo-thermal dual-curing polyolefin layer, the lower layer white polyolefin film layer 2 is a thermosetting film layer, the melt index of the thermosetting film is 10g/10min, the upper and lower layer films are integrally formed by adopting an extruder co-extrusion mode, and no gap exists between the two layers of films.
The lower white polyolefin adhesive film is a thermosetting adhesive film, the thickness of the lower white polyolefin adhesive film is 0.50mm, and the light reflection rate is 92.3% (light with the wavelength of 400-1100 nm). The upper layer transparent polyolefin adhesive film is an ultraviolet light/heat double-curing adhesive film, the thickness is 0.25mm, and the crosslinking degree is 25% after ultraviolet irradiation.
The polyolefin packaging adhesive film with high reflectivity is cured after being irradiated by 400W ultraviolet light for 3min, then is packaged by adopting a conventional method in the field, and is laminated at high temperature and thermally cured at 145 ℃ for 15min to obtain the packaged photovoltaic module.
Example 2
A high-reflectivity polyolefin packaging adhesive film is shown in figure 1 and comprises an upper transparent polyolefin adhesive film layer 1 and a lower white polyolefin adhesive film layer 2; wherein, the upper layer transparent polyolefin film layer 1 is a photo-thermal dual-curing polyolefin layer, the lower layer white polyolefin film layer 2 is a thermosetting film layer, and the melt index of the thermosetting film is 10g/10 min.
The upper transparent polyolefin film layer 1 of the present embodiment is independently extruded and molded by an extruder, has a thickness of 0.30mm, and is embossed with a first pattern on the lower surface of the upper transparent polyolefin film layer 1, as shown in fig. 2, the first pattern is a regular spot pattern, the spots are arranged transversely, the mesh number of the spots is 100 meshes, and the depth is 20 μm; the lower white polyolefin film layer 2 is independently extruded and molded by an extruder, the thickness of the lower white polyolefin film layer 2 is 0.45mm, the light reflection rate is 92.8% (light of 400-1100 nm), and second patterns are printed on the upper surface of the lower white polyolefin film layer 2 in a pressing mode, as shown in figure 3, the second patterns are regular spot patterns, spots are transversely arranged, the number of the spots is 125 meshes, the depth is 15 microns, and the spots of the second patterns are denser than the spots of the first patterns.
Irradiating the upper transparent polyolefin adhesive film layer 1 with 400W ultraviolet light for 3min, and then simply laminating the upper transparent polyolefin adhesive film layer 1 and the lower white polyolefin adhesive film layer 2 to ensure that the lower surface of the upper transparent polyolefin adhesive film layer 1 is in fit connection with the upper surface of the lower white polyolefin adhesive film layer 2. And then packaging according to a conventional method in the field, laminating at high temperature, and thermally curing at 145 ℃ for 15min to obtain the packaged photovoltaic module.
When the upper and lower two-layer adhesive film layer is formed independently, the upper transparent polyolefin adhesive film layer 1 is cured by ultraviolet irradiation and then is pressed with the lower white polyolefin adhesive film layer 2 for photovoltaic adhesive film packaging.
Comparative example 1
The comparison example is a composite adhesive film of a commercially available white polyolefin adhesive film and a non-woven fabric, and the structure of the composite adhesive film is that an upper non-woven fabric layer, a lower white polyolefin adhesive film layer and a two-layer structure are integrally formed.
Comparative example 2
The comparison example is a pre-crosslinked white polyolefin adhesive film sold in the market, and the structure of the pre-crosslinked white polyolefin adhesive film is a layer of white polyolefin adhesive film, and the adhesive film has a certain crosslinking degree after electron beam irradiation or ultraviolet irradiation.
Comparative example 3
The comparative example is a commercially available low-melt-index polyolefin adhesive film, the structure of the adhesive film is a layer of white polyolefin adhesive film, and the melt index of the adhesive film is less than or equal to 5g/10 min.
Performance testing
The polyolefin photovoltaic encapsulation adhesive film in the example 1-2 is subjected to performance test according to GBT 29848 and 2018 ethylene-vinyl acetate copolymer (EVA) adhesive film for photovoltaic module encapsulation, detailed performance test results are shown in Table 1, and the sample prepared in the example 1-2 is subjected to sample preparation and then is laminated to observe the appearance of the sample to have the defects of wrinkles and the like.
TABLE 1 test results of polyolefin photovoltaic encapsulant films prepared in examples 1-2 and cured encapsulant films prepared in comparative examples 1-3
From table 1, the utility model discloses embodiment 1-2's polyolefin encapsulation glued membrane has fine product characteristic, and the subassembly does not have the bad phenomenon of outward appearance such as fold, and the reflectivity is greater than 93%, and has good weatherability, has promoted the generating efficiency and the production yield of subassembly greatly, and reduction in production cost is favorable to photovoltaic module's extensive popularization and application. Comparative example 1 ~ 3 have glued membrane fold, cohesive force on the low side, the not enough scheduling problem of weatherability, are difficult to guarantee the reliability that photovoltaic module used in the open air for a long time, explain the utility model discloses the polyolefin encapsulation glued membrane that has the high reflectivity of two-layer structure has higher reflectivity, better weatherability, and does not have bad outward appearance phenomenon.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (10)
1. The high-reflectivity polyolefin packaging adhesive film is characterized by comprising an upper transparent polyolefin adhesive film layer and a lower white polyolefin adhesive film layer, wherein the upper transparent polyolefin adhesive film layer is a photo-thermal dual-curing polyolefin layer, and the lower white polyolefin adhesive film layer is a thermosetting adhesive film layer.
2. The high-reflectivity polyolefin encapsulant film as claimed in claim 1, wherein the thickness of the lower white polyolefin encapsulant film layer is 0.35-0.5 mm.
3. The high-reflectivity polyolefin encapsulant film as claimed in claim 2, wherein the thickness of the lower white polyolefin encapsulant film layer is 0.4-0.45 mm.
4. The adhesive film of claim 1, wherein the lower white polyolefin layer has a reflectance of 400-1100nm light of 92% or more.
5. The high reflectivity polyolefin encapsulant film of claim 1, wherein the upper transparent polyolefin encapsulant film layer has a thickness of 0.20-0.35 mm.
6. The high reflectivity polyolefin encapsulant film of claim 5, wherein the upper transparent polyolefin encapsulant film layer has a thickness of 0.3 mm.
7. The high reflectivity polyolefin encapsulant film of claim 1, wherein the upper transparent polyolefin encapsulant film layer and the lower white polyolefin encapsulant film layer are integrally formed.
8. The high-reflectivity polyolefin packaging adhesive film according to claim 1, wherein the upper transparent polyolefin adhesive film layer is formed independently, and a first pattern is embossed on the lower surface of the upper transparent polyolefin adhesive film layer;
the lower white polyolefin film layer is independently formed, and second patterns are stamped on the upper surface of the lower white polyolefin film layer.
9. The high-reflectivity polyolefin packaging adhesive film of claim 8, wherein the upper transparent polyolefin adhesive film layer and the lower white polyolefin adhesive film layer are in press fit connection, and the lower surface of the upper transparent polyolefin adhesive film layer is attached to the upper surface of the lower white polyolefin adhesive film layer.
10. The high-reflectivity polyolefin packaging adhesive film of claim 8, wherein the first pattern is a regular pattern, the number of the first pattern is 80-120 meshes, and the depth of the first pattern is 10-20 μm; the second pattern is regular spots, the number of the spots of the second pattern is 120-150 meshes, and the depth of the spots is 10-20 μm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020549972.7U CN212610389U (en) | 2020-04-14 | 2020-04-14 | High-reflectivity polyolefin packaging adhesive film |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020549972.7U CN212610389U (en) | 2020-04-14 | 2020-04-14 | High-reflectivity polyolefin packaging adhesive film |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113416501A (en) * | 2021-06-16 | 2021-09-21 | 常州百佳年代薄膜科技股份有限公司 | Composite adhesive film, photovoltaic module and irradiation light reflection method for composite adhesive film |
| CN114015364A (en) * | 2021-10-11 | 2022-02-08 | 上海润势科技有限公司 | Polyolefin photovoltaic packaging adhesive film and preparation method thereof |
-
2020
- 2020-04-14 CN CN202020549972.7U patent/CN212610389U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113416501A (en) * | 2021-06-16 | 2021-09-21 | 常州百佳年代薄膜科技股份有限公司 | Composite adhesive film, photovoltaic module and irradiation light reflection method for composite adhesive film |
| CN114015364A (en) * | 2021-10-11 | 2022-02-08 | 上海润势科技有限公司 | Polyolefin photovoltaic packaging adhesive film and preparation method thereof |
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