CN218101280U - Photovoltaic module - Google Patents
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- CN218101280U CN218101280U CN202220491176.1U CN202220491176U CN218101280U CN 218101280 U CN218101280 U CN 218101280U CN 202220491176 U CN202220491176 U CN 202220491176U CN 218101280 U CN218101280 U CN 218101280U
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Abstract
The utility model belongs to the technical field of the photovoltaic. The utility model discloses a photovoltaic module includes front substrate, front rubber membrane, N-TOPCon battery piece, back rubber membrane and back substrate in proper order. The front layer adhesive film is at least one of transparent POE adhesive film or transparent EPE adhesive film. The utility model provides a photovoltaic module low in production cost has good anti PID performance.
Description
Technical Field
The utility model belongs to the technical field of the photovoltaic, especially, relate to a photovoltaic module.
Background
The energy problem is becoming more serious, and solar energy is always attracting attention as a renewable clean energy source. The photovoltaic technology is a technology capable of directly converting solar light energy into electric energy for people to use, and can effectively utilize solar energy to make important contribution to solving energy problems.
The photovoltaic module is a direct embodiment of the photovoltaic technology, is a core part in a solar power generation system, and converts solar energy into electric energy or sends the electric energy to a storage battery for storage. The existing photovoltaic module mainly comprises a front substrate, a front adhesive film, a cell, a rear adhesive film and a rear substrate, wherein the cell is used for photoelectric conversion, and the front substrate, the front adhesive film, the rear adhesive film and the rear substrate are used for protecting the cell. When the photovoltaic module generates electricity, the battery piece generates electromotive force through a photovoltaic effect, the two surfaces of the battery piece are electrically connected to generate current, and the photovoltaic module completes photoelectric conversion.
As P-type PERC cells approach their theoretical efficiency limits, N-type cell technology will become the direction of future development, with TOPCon cell technology being one of the most important N-type technology routes. The back surface of the N-TOPCon battery piece is chemically passivated, has high-density positive charges, can play an effective role in repelling cations and avoids the cations from being enriched on the surface of the back surface of the N-TOPCon battery piece; the front surface of the N-TOPCon battery piece is field passivated Al 2 O 3 The positive ion concentration cell has high-density negative charges, cations are easy to concentrate under the action of negative bias, and the PID effect of the cell is improved, so that the PID effect of the N-TOPCon cell is mainly concentrated on the front side of the N-TOPCon cell.
Therefore, based on the PID effect of the N-TOPCon cell slice assembly, it is highly desirable to provide a photovoltaic module packaging solution to solve the PID effect caused by the front surface of the cell slice.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a photovoltaic module, reduces the PID effect when the photovoltaic module is used, guarantees the generating efficiency of the photovoltaic module, and improves the photoelectric conversion efficiency.
The embodiment of the application provides a photovoltaic module, includes front substrate, front rubber membrane, N-TOPCon battery piece, back floor glued membrane and back floor base plate in proper order, and the front rubber membrane is at least one in transparent POE glued membrane or the transparent EPE glued membrane.
Preferably, the photovoltaic module is a single-glass module, and the rear adhesive film is at least one of a transparent POE adhesive film, a white POE adhesive film, a transparent EPE adhesive film, a white EPE adhesive film, a transparent EVA adhesive film or a white EVA adhesive film.
Preferably, the photovoltaic module is a single-glass module, and the rear adhesive film is a transparent POE adhesive film, a white POE adhesive film, a transparent EPE adhesive film or a white EPE adhesive film.
Preferably, the photovoltaic module is a single-glass module, and the rear adhesive film is a white POE adhesive film or a white EPE adhesive film.
Preferably, the photovoltaic module is a single-glass module, and the back-layer adhesive film is a white EVA adhesive film.
Preferably, the photovoltaic module is a double-sided double-glass module, and the rear adhesive film is at least one of a transparent POE adhesive film, a transparent EPE adhesive film or a transparent EVA adhesive film.
Preferably, the photovoltaic module is a double-sided double-glass module, and the rear adhesive film is a transparent EPE adhesive film or a transparent POE adhesive film.
Preferably, the photovoltaic module is a double-sided double-glass module, and the rear-layer adhesive film is a transparent EVA adhesive film.
Preferably, the photovoltaic module is a double-sided back-penetrating module, and the back adhesive film is at least one of a transparent POE adhesive film, a transparent EPE adhesive film or a transparent EVA adhesive film.
Preferably, the photovoltaic module is a double-sided back-penetrating module, and the back-layer adhesive film is a transparent EVA (ethylene vinyl acetate) adhesive film.
In summary, the embodiment of the present application has at least the following beneficial effects:
1. according to the photovoltaic module provided by the embodiment of the application, at least one of the transparent POE adhesive film and the transparent EPE adhesive film is arranged on the front surface of the N-TOPCon battery piece, so that the problem of PID effect generated when the photovoltaic module is used is solved, and the photovoltaic module has excellent PID resistance;
2. according to the embodiment of the application, on the premise that the packaging adhesive film and the photovoltaic substrate are not improved, the packaging adhesive film of a specific type is adopted to match the N-TOPCon battery piece with the type of the photovoltaic module, the PID resistance performance of the photovoltaic module is improved, and the PID resistance cost of the photovoltaic module is effectively reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of a photovoltaic module according to the present application;
in the figure: the photovoltaic module 100 comprises a front substrate 11, a front adhesive film 12, an N-TOPCon cell sheet 13, a back adhesive film 14 and a back substrate 15.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention in the specific embodiments will be clearly and completely described below in conjunction with the embodiments of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to examples.
This application is for solving the big problem of photovoltaic module's PID effect, and this application openly sets up at least one in transparent POE glued membrane or the transparent EPE glued membrane at N-TOPCon battery piece according to the photovoltaic module kind, makes photovoltaic module have excellent anti PID performance.
Photovoltaic modules generally need to use the cell pieces in series, and the electromotive force on the surfaces of the cell pieces is increased with the large-scale application of photovoltaic systems. Due to the requirement of lightning protection engineering, the frame of a general photovoltaic module is required to be grounded, so that higher voltage is formed between the cell and the frame. The PID effect (Potential Induced Degradation), also known as Potential Induced Degradation, refers to a phenomenon that when a higher bias voltage exists between an electrode and a frame of a photovoltaic module, cations in glass undergo ion migration and adhere to the surface of a cell, thereby causing power reduction of the photovoltaic module. A large amount of charges are accumulated on the surface of the battery piece, so that the surface passivation effect of the battery piece is deteriorated, the filling factor, the open-circuit voltage and the short-circuit current of the battery piece are reduced, and the power of a battery assembly is attenuated. When the photovoltaic module is used in a humid environment, water vapor enters the inside of the module through the silica gel or the back plate used for sealing the edge. The traditional photovoltaic module usually adopts an EVA material as a packaging adhesive film, and ester bonds of the EVA material are decomposed after meeting water to generate acetic acid capable of freely moving. After the acetic acid reacts with the alkali on the surface of the glass, cations in a free state are generated. The PID effect is further exacerbated by the cations moving toward the cell surface and becoming concentrated under the influence of the applied electric field. According to the embodiment of the application, aiming at the types of the N-TOPCon cell 13 and the photovoltaic module 100 in the photovoltaic module, a specific type of packaging adhesive film is adopted to match and package at a specific position of the photovoltaic module 100, so that the effect of improving the PID resistance of the photovoltaic module is achieved.
The embodiment of the application provides a photovoltaic module 100, which sequentially comprises a front substrate 11, a front adhesive film 12, an N-TOPCon cell 13, a rear adhesive film 14 and a rear substrate 15. Wherein the front adhesive film 12 is at least one of a transparent POE adhesive film or a transparent EPE adhesive film.
The N-TOPCon cell was produced by the TOPCon technique. TOPCon is a Tunnel Oxide Passivated Contact (Passivated Contact) solar cell technology based on the selective carrier principle, a cell is an N-type silicon substrate cell, a layer of ultrathin silicon Oxide is prepared on the back of the cell, then a doped silicon thin layer is deposited, and the two layers form a Passivated Contact structure together, so that the surface recombination and the metal Contact recombination are effectively reduced, and the photoelectric conversion efficiency of the cell is greatly improved. The back surface of the N-TOPCon battery piece is chemically passivated, has high-density positive charges, can play an effective role in repelling cations and avoids the cations from being enriched on the surface of the back surface of the N-TOPCon battery piece; the front surface of the N-TOPCon battery piece is field passivated Al 2 O 3 Has high-density negative charges, is easy to enrich positive ions under the action of negative bias, and improves the PID effect of the cell plate, so that N isThe PID effect of the TOPCon cell is mainly focused on the front side of the N-TOPCon cell. The front surface of the photovoltaic module needs to receive direct light of the sun, so the front substrate and the front adhesive film need to have high light transmittance. The front adhesive film of the photovoltaic module of the N-TOPCon cell piece is at least one of a transparent POE adhesive film or a transparent EPE adhesive film. The POE adhesive film or the EPE adhesive film with low water vapor permeability and good PID resistance is used on the front surface of the N-TOPCon cell piece, so that the PID resistance of the photovoltaic module packaged by the N-TOPCon cell piece can be effectively improved. The POE adhesive film has excellent water vapor barrier capacity and ion barrier capacity, the molecular chain structure of the POE adhesive film is stable, acid substances cannot be generated by decomposition in the aging process, the generation of free cations can be reduced, the contact between the free cations and the surface of the N-TOPCon cell piece can be prevented, and the PID effect of the photovoltaic module can be reduced. The EPE adhesive film is a co-extrusion adhesive film of an EVA adhesive film and a POE adhesive film, and has excellent adhesive property and lower production cost. The EPE glued membrane can not reduce the production of free state cation, but the EPE glued membrane is the crowded glued membrane altogether of EVA glued membrane and POE glued membrane, consequently can reach the effect of the same separation steam of POE glued membrane and cation to improve photovoltaic module's anti PID performance. In this application embodiment back layer glued membrane 14 is POE glued membrane or EPE glued membrane, POE glued membrane or EPE glued membrane can separate steam well during the steam enrichment, and prevent the positive enrichment of free state cation at N-TOPCon battery piece 13, reduce photovoltaic module 100's PID effect, reach the effect that improves the anti PID performance of photovoltaic module 100, and transparent POE glued membrane has extremely high luminousness with transparent EPE glued membrane, can reduce the reflection of sunlight, increase the incident volume of sunlight, improve photovoltaic module 100's generating efficiency. In the embodiment of the application, the photovoltaic cell is an N-TOPCon cell 13, the back surface of the photovoltaic cell contains high-density positive charges, the enrichment of cations can be effectively reduced, and the PID effect on the back surface of the N-TOPCon cell 13 is weak, so that the back-layer adhesive film 12 of the photovoltaic module 100 has no requirement on PID resistance, and the EVA adhesive film which is lower in price and more mature in technology can be used for packaging, so that the effect of reducing the production cost of the photovoltaic module 100 is achieved. The back adhesive film 14 of the photovoltaic module 100 of the N-TOPCon cell sheet has no specific requirement, and can be adaptively adjusted according to the requirement of the photovoltaic module 100 to ensure that the photovoltaic module100 mass is sufficient.
As a specific embodiment, when the photovoltaic module 100 is a single-glass module, the rear adhesive film 14 is at least one of a transparent POE adhesive film, a white POE adhesive film, a transparent EPE adhesive film, a white EPE adhesive film, a transparent EVA adhesive film, or a white EVA adhesive film, and the front adhesive film 12 is at least one of a transparent POE adhesive film or a transparent EPE adhesive film.
The encapsulation adhesive film used is specifically adjusted according to the type of the photovoltaic module. The single glass assembly is a photovoltaic assembly which performs photoelectric conversion only through the front surface of the cell, so that the front substrate 11 is made of photovoltaic glass, and the rear substrate 15 is made of other materials. The front substrate 11 and the front adhesive film 12 of the single-glass assembly both need to have higher light transmittance, and at least one of the rear adhesive film 14 or the rear substrate 15 needs to have higher light reflection rate, so as to ensure that the single-glass assembly has higher power generation efficiency. The single-glass assembly of the N-TOPCon cell has a strong PID effect on the front surface of the N-TOPCon cell, so that the front adhesive film 12 is at least one of a transparent POE adhesive film or a transparent EPE adhesive film with high PID resistance and high light transmittance, the enrichment of cations on the front surface of the N-TOPCon cell 13 is reduced, and the assembly is ensured to have good PID resistance. The transparent POE adhesive film improves the PID resistance of the single-glass assembly by reducing the generation of free cations and blocking water vapor and cations; transparent EPE glued membrane improves the anti PID performance of single glass assembly through the mode of separation steam and positive ion. The battery piece is the single glass assembly of N-TOPCon battery piece 13, and the back has weaker PID effect, therefore this application embodiment does not have the requirement of anti PID performance to back glued membrane 14, and back glued membrane 14 is at least one in transparent POE glued membrane, white POE glued membrane, transparent EPE glued membrane, white EPE glued membrane, transparent EVA glued membrane or the white EVA glued membrane, can carry out the adaptability adjustment according to production requirement and product property demand, guarantees that the single glass assembly back has excellent reflective performance can. The white EVA adhesive film also has the effect of improving the PID resistance of the photovoltaic module 100, and titanium dioxide can be added to the white EVA adhesive film to serve as a reflective filler in order to improve the reflectivity of the adhesive film. O on surface lattice of rutile titanium dioxide used for white EVA adhesive film 2- Easily lose electronsThe system is caused to display electronegativity, cations on the surface of the cell are adsorbed, cations separated out by materials such as glass are blocked, and the cations are prevented from being enriched on the surface of the cell, so that the PID resistance of the photovoltaic module 100 is improved. According to the embodiment of the application, the cost of the single-glass assembly can be reduced by using the transparent EVA adhesive film, and the production requirement of the single-glass assembly is met; one of a transparent POE adhesive film, a white POE adhesive film, a transparent EPE adhesive film or a white EPE adhesive film with better service performance can be used, the PID resistance and the water vapor resistance of the photovoltaic module 100 are further improved, and the effects of prolonging the service life of the photovoltaic module 100 and improving the environmental adaptability of the photovoltaic module 100 are achieved; or the white EVA adhesive film is used to reduce the cost and further improve the PID resistance of the photovoltaic module 100.
As a specific embodiment, when the photovoltaic module 100 is a double-sided dual-glass module, the rear adhesive film 14 is a transparent EVA adhesive film, a transparent POE adhesive film, or a transparent EPE adhesive film, and the front adhesive film 12 is one of a transparent POE adhesive film or a transparent EPE adhesive film.
When photovoltaic module 100 is two-sided dual glass assembly in this application embodiment, back glued membrane 14 is transparent EVA glued membrane, transparent POE glued membrane or transparent EPE glued membrane. The PID effect on the back of the N-TOPCon cell 13 is weak, so when the photovoltaic module 100 is a double-sided dual-glass module, the selection of the back adhesive film 12 does not excessively consider the PID effect of the photovoltaic module 100, and the back adhesive film 12 is one of a transparent EVA adhesive film, a transparent POE adhesive film, or a transparent EPE adhesive film. Transparent EVA glued membrane, transparent POE glued membrane and transparent EPE glued membrane all have outstanding luminousness, and the incident volume of the light of penetrating into the backplate can effectively be improved to back layer glued membrane 14 as two-sided dual glass assembly, improves photovoltaic module 100's generated energy. When photovoltaic module 100 is two-sided dual glass assembly, this application embodiment back glued membrane 14 can adopt transparent EVA glued membrane to reduce the manufacturing cost of product, also can adopt transparent POE glued membrane or transparent EPE glued membrane further to promote photovoltaic module 100's anti PID performance and vapor resistance ability, extension photovoltaic module 100's life and generating efficiency. When photovoltaic module 100 was two-sided dual glass assembly in this application embodiment, front rubber membrane 12 was transparent POE glued membrane or transparent EPE glued membrane. Transparent POE glued membrane and transparent EPE glued membrane can effective separation steam and cation, reduce the positive enrichment of cation at N-TOPCon battery piece 13, improve two-sided dual glass assembly's anti PID performance to transparent POE glued membrane has high luminousness with transparent EPE glued membrane, improves the throughput of light, improves two-sided dual glass assembly's generated energy.
As a specific embodiment, when the photovoltaic module is a double-sided back-through module, the back adhesive film 14 is a transparent EVA adhesive film, a transparent POE adhesive film or a transparent EPE adhesive film, and the front adhesive film 12 is one of a transparent POE adhesive film or a transparent EPE adhesive film.
The double-sided back-through assembly, i.e., the rear substrate 15, is a double-sided assembly of a transparent backplane. The transparent back plate is usually made of a non-glass transparent material, has low production cost, no explosion risk, light weight and high volume resistance, is suitable for the photovoltaic module 100 with high power and large size, and can effectively reduce the production cost and the installation cost of the photovoltaic module 100. The transparent back plate has good PID (potential induced degradation) resistance effect, and has good bonding performance for various packaging adhesive films, so that the transparent back plate can achieve good packaging effect with various packaging adhesive films, the packaging cost of the double-sided assembly can be further reduced, and the reliability of the photovoltaic assembly 100 is improved. When photovoltaic module 100 is two-sided back of body subassembly, transparent EVA glued membrane, transparent POE glued membrane or transparent EPE glued membrane are used to two-sided back of body subassembly's back layer glued membrane 14, according to production requirement and photovoltaic module 100's operation requirement, and adaptability adjustment can be carried out to front layer glued membrane 12, guarantees photovoltaic module 100's anti PID performance and outstanding generating effect. When photovoltaic module 100 was two-sided back of body subassembly that passes through, front rubber membrane 12 was one of transparent POE glued membrane or transparent EPE glued membrane, not only possessed excellent luminousness, can also guarantee two-sided anti PID performance of passing through the back of body subassembly.
For better understanding of the above technical solutions, the above technical solutions will be described in detail with reference to the drawings and specific embodiments, but the present application is not limited to the specific embodiments.
Example 1
A photovoltaic module 100 comprises a front substrate 11, a front adhesive film 12, an N-TOPCon cell 13, a back adhesive film 14 and a back substrate 15 in sequence, and is specifically a single-glass module.
The front substrate 11 is photovoltaic glass, the front adhesive film 12 is a transparent POE adhesive film, the rear adhesive film 14 is a white EPE adhesive film, and the rear substrate 15 is a TPT (thermoplastic vulcanizate) structural backboard.
Example 2
A photovoltaic module 100 comprises a front substrate 11, a front adhesive film 12, an N-TOPCon cell 13, a rear adhesive film 14 and a rear substrate 15 in sequence, and is a single-glass module.
The front substrate 11 is photovoltaic glass, the front adhesive film 12 is a transparent EPE adhesive film, the rear adhesive film 14 is a white EVA adhesive film, and the rear substrate 15 is a TPT structural back plate.
Example 3
A photovoltaic module 100 comprises a front substrate 11, a front adhesive film 12, an N-TOPCON cell 13, a rear adhesive film 14 and a rear substrate 15 in sequence, and is a single-glass module.
The front substrate 11 is photovoltaic glass, the front adhesive film 12 is a transparent POE adhesive film, the rear adhesive film 14 is a white POE adhesive film, and the rear substrate 15 is a TPT (thermoplastic vulcanizate) structural backboard.
Example 4
A photovoltaic module 100 comprises a front substrate 11, a front adhesive film 12, a N-TOPCON cell 13, a back adhesive film 14 and a back substrate 15 in sequence, and is specifically a double-sided double-glass module.
The front substrate 11 is photovoltaic glass, the front adhesive film 12 is a transparent POE adhesive film, the rear adhesive film 14 is a transparent EVA adhesive film, and the rear substrate 15 is photovoltaic glass.
Example 5
A photovoltaic module 100 comprises a front substrate 11, a front adhesive film 12, an N-TOPCON cell 13, a rear adhesive film 14 and a rear substrate 15 in sequence, and is specifically a double-sided double-glass module.
The front substrate 11 is photovoltaic glass, the front adhesive film 12 is a transparent EPE adhesive film, the back adhesive film 14 is a transparent EPE adhesive film, and the back substrate 15 is photovoltaic glass.
Example 6
A photovoltaic module 100 comprises a front substrate 11, a front adhesive film 12, a N-TOPCON cell 13, a back adhesive film 14 and a back substrate 15 in sequence, and is specifically a double-sided transparent back module.
The front substrate 11 is photovoltaic glass, the front adhesive film 12 is a transparent EPE adhesive film, the rear adhesive film 14 is a transparent POE adhesive film, and the rear substrate 15 is a transparent backboard.
Example 7
A photovoltaic module 100 comprises a front substrate 11, a front adhesive film 12, a N-TOPCON cell 13, a back adhesive film 14 and a back substrate 15 in sequence, and is specifically a double-sided transparent back module.
The front substrate 11 is photovoltaic glass, the front adhesive film 12 is a transparent POE adhesive film, the rear adhesive film 14 is a transparent EPE adhesive film, and the rear substrate 15 is a transparent back plate.
The photovoltaic module provided by the embodiments 1-7 in the application has the advantages of good PID resistance, low production cost, high production adaptability and good application prospect.
It will be appreciated that modifications and variations are possible to those skilled in the art in light of the above teachings, and it is intended to cover all such modifications and variations as fall within the scope of the appended claims.
Claims (10)
1. Photovoltaic module includes front substrate, front rubber membrane, N-TOPCon battery piece, back glue membrane and back substrate in proper order, its characterized in that:
the front layer adhesive film is at least one of a transparent POE adhesive film or a transparent EPE adhesive film.
2. The photovoltaic module of claim 1, wherein:
the photovoltaic module is a single-glass module, and the rear adhesive film is at least one of a transparent POE adhesive film, a white POE adhesive film, a transparent EPE adhesive film, a white EPE adhesive film, a transparent EVA adhesive film or a white EVA adhesive film.
3. The photovoltaic module of claim 2, wherein:
the photovoltaic module is a single-glass module, and the rear glue film is the transparent POE glue film, the white POE glue film, the transparent EPE glue film or the white EPE glue film.
4. The photovoltaic module of claim 2, wherein:
the photovoltaic module is a single-glass module, and the rear adhesive film is the white POE adhesive film or the white EPE adhesive film.
5. The photovoltaic module of claim 2, wherein:
the photovoltaic module is a single-glass module, and the rear-layer adhesive film is the white EVA adhesive film.
6. The photovoltaic module of claim 1, wherein:
the photovoltaic module is a double-sided double-glass module, and the rear adhesive film is at least one of a transparent POE adhesive film, a transparent EPE adhesive film or a transparent EVA adhesive film.
7. The photovoltaic module of claim 6, wherein:
the photovoltaic module is a double-sided double-glass module, and the rear adhesive film is the transparent EPE adhesive film or the transparent POE adhesive film.
8. The photovoltaic module of claim 6, wherein:
the photovoltaic module is a double-sided double-glass module, and the rear-layer adhesive film is the transparent EVA adhesive film.
9. The photovoltaic module of claim 1, wherein:
the photovoltaic module is a double-sided transparent back module, and the rear adhesive film is at least one of a transparent POE adhesive film, a transparent EPE adhesive film or a transparent EVA adhesive film.
10. The photovoltaic module of claim 9, wherein:
the photovoltaic module is a double-sided transparent back module, and the rear-layer adhesive film is the transparent EVA adhesive film.
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| CN202220491176.1U CN218101280U (en) | 2022-03-08 | 2022-03-08 | Photovoltaic module |
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| CN202220491176.1U CN218101280U (en) | 2022-03-08 | 2022-03-08 | Photovoltaic module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116082984A (en) * | 2022-12-29 | 2023-05-09 | 苏州赛伍应用技术股份有限公司 | Packaging adhesive film and preparation method and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116082984A (en) * | 2022-12-29 | 2023-05-09 | 苏州赛伍应用技术股份有限公司 | Packaging adhesive film and preparation method and application thereof |
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