Nameplate and its preparation method, photovoltaic module

Abstract

This invention discloses a nameplate and its preparation method, as well as a photovoltaic module, relating to the field of photovoltaic module technology. The nameplate includes a first component and a second component, wherein the second component includes an adhesive layer. When the nameplate is not in use, the first component and the second component are stored separately. When the nameplate is in use, the first component and the second component are bonded together. The nameplate has a light transmittance of 80%~90%. This invention solves the problems of weather resistance and adhesion of existing nameplates in high-temperature, high-humidity, and high-salt-spray application scenarios, and the nameplate has excellent light transmittance, reducing the shading area of ​​the nameplate and ensuring the efficiency of the photovoltaic module.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module technology, and in particular to a nameplate and its preparation method, and a photovoltaic module. Background Technology

[0002] The nameplate of a photovoltaic module contains the module's core parameters and production information. It not only serves as identification for the photovoltaic module but also facilitates its management, maintenance, monitoring, and traceability. Therefore, it is one of the important components of a photovoltaic module.

[0003] Currently, nameplates for photovoltaic (PV) modules are generally made of self-adhesive matte silver PET label paper. However, with decades of development in the PV industry, their application areas have greatly expanded. Existing nameplate technology and materials have revealed numerous drawbacks: for example, nameplates exposed in desert areas suffer severe wear and tear, resulting in illegible text. In high-altitude areas, nameplates exposed to strong ultraviolet radiation and low temperatures yellow, fade, crack, and even detach. On coastal mudflats and offshore PV modules, nameplates exposed to high salt spray, humidity, and high temperatures deteriorate and may even detach. Furthermore, the slow heat dissipation on the back of double-sided double-glass modules and the smooth glass surface reduce the long-term adhesion of the nameplate, leading to bulging and even detachment. These cases result in the module still operating healthily, but the nameplate is damaged or lost. This becomes a bottleneck in the PV system, affecting the module's aesthetics and operation and maintenance throughout its lifespan. Therefore, the industry urgently needs a new, simple, and reliable nameplate and installation technology that matches the module's design lifespan.

[0004] Existing technology, CN111394011A, discloses a UV-resistant photovoltaic module label and its preparation method: a fluoropolymer resin is coated onto a PET substrate label, and a layer of stop-type EVA adhesive film is simultaneously cast to increase adhesion and enhance the label's UV resistance. While this improves the label's weather resistance in high UV application scenarios, it still cannot solve the weather resistance and adhesion problems in high-temperature, high-humidity, and high-salt-spray application scenarios. Summary of the Invention

[0005] Objective of the invention: To provide a nameplate and its preparation method, and a photovoltaic module, so as to at least solve one of the problems existing in the prior art.

[0006] Technical solution: A nameplate, comprising: A first component and a second component, wherein the second component includes an adhesive layer; When the nameplate is not in use, the first component and the second component are stored separately; when the nameplate is in use, the first component and the second component are bonded together. The light transmittance of the nameplate is 80%~90%.

[0007] Preferably, the first component is provided with a first functional layer, a first substrate layer and a second functional layer stacked from top to bottom; The second functional layer includes: a diffusion layer connected to the first substrate layer on the side away from the first functional layer, the diffusion layer being connected to the printing layer; The second component is connected to the lower surface of the first component; the second component is provided with a first adhesive layer, a second substrate layer and a second adhesive layer stacked from top to bottom; When the first component and the second component are in an unused state, a first release film is provided on the upper surface of the first adhesive layer, and a second release film is provided on the lower surface of the second adhesive layer.

[0008] Preferably, the thickness of the first functional layer is 3-20 μm, and the first functional layer includes: a matrix resin, a first additive, and a diluent; The matrix resin is one or more of the following: fluorinated resin, acrylic resin, polyester resin, and epoxy resin. The first additive is one or more of the following: dispersant, leveling agent, ultraviolet absorber, catalyst, and crosslinking agent. The crosslinking agent is one or more combinations of aliphatic or alicyclic isocyanates; The diluent is one or more of xylene, butyl acetate, propyl acetate, ethyl acetate, ethyl triethoxypropionate, propylene carbonate, diisobutyl ketone, cyclohexanone, butanone, and propylene glycol methyl ether acetate.

[0009] By weight, the first functional layer comprises: 70-90 parts of matrix resin, 6-15 parts of first additive, and 10-30 parts of diluent.

[0010] Preferably, the first substrate layer is a PET film, PE film, PP film or PI film; The lower surface of the first substrate layer is coated with a PVA primer.

[0011] Preferably, the thickness of the diffusion layer is 20-50 μm, and the diffusion layer comprises: PVA, a second auxiliary agent, and a diluent; The degree of polymerization of PVA is 1500-3500; The second auxiliary agent is one or more of the following: acetylenic diol wetting agents and polyether-modified siloxane polymers; The diluent is deionized water; The diffusion layer comprises, by weight, 10-30 parts of PVA, 1-10 parts of a second auxiliary agent, and 50-90 parts of a diluent.

[0012] Preferably, the thickness of the printed layer is 10-25 μm, and the printed layer comprises: an adhesive, a filler, a third auxiliary agent, and a diluent; The adhesive is a composition of low-polymerization-degree polyvinyl alcohol and polyvinyl butyral. The filler is one or both of fumed silica and alumina; The third auxiliary agent includes dispersants, defoamers, wetting agents, crosslinking agents, and antistatic agents. The crosslinking agent is an isocyanate compound; By weight, the printed layer comprises: 5-25 parts PVA, 1-10 parts PVB, 2-15 parts third auxiliary agent, 20-40 parts filler and 15-40 parts diluent.

[0013] Preferably, the first adhesive layer and the second adhesive layer comprise: silicone rubber, tackifying resin, a fourth additive, and a diluent; The dry adhesive content of the first and second adhesive layers is 10-40 g / m. 2 ; The fourth auxiliary agent includes one or more of the following: anchoring agent, crosslinking agent, catalyst, and ultraviolet absorber; By weight, the first adhesive layer and the second adhesive layer each independently comprise: 40-60 parts of silicone rubber, 30-50 parts of tackifying resin, 1-10 parts of fourth additive, and 10-30 parts of diluent.

[0014] To achieve the above objectives, according to another aspect of this application, a method for preparing a nameplate is also provided.

[0015] The nameplate preparation method according to this application includes: S101. At room temperature, mix all materials of the first functional layer according to the formula, add diluent to adjust the viscosity, and stir in a closed manner for 30-60 minutes; pass the well-stirred coating through a filter and circulate it for 10-30 minutes. S102. Transfer the first functional layer formulation coating to the first substrate layer coating surface, and then dry it; apply PVA primer to the other side using a micro-grooved roller, and then dry it. S103. At room temperature, mix the diffusion layer slurry according to the ratio, add diluent to adjust the viscosity, and stir in a closed manner for 30-60 minutes; pass the well-stirred coating through a filter and circulate it for 10-30 minutes; use a microgravure coating device to transfer the slurry to the primer surface, and then dry it. S104. Under room temperature conditions, the printing layer slurry is mixed according to the formula, and a diluent is added to adjust the viscosity. The uniformly stirred coating is passed through a filter and circulated for 10-30 minutes. The prepared slurry is transferred to the surface of the diffusion layer through a microgravure coating process. Then, it is dried and left to mature for 2 days to obtain the first component. S105. The second substrate layer is subjected to online corona treatment on both sides, coated with silicone pressure-sensitive adhesive by micro-grooving roller, and then laminated with fluorine release film. After drying, the second component is obtained. S106. Cut the first component and the second component to the specified size.

[0016] To achieve the above objectives, according to another aspect of this application, a photovoltaic module is also provided.

[0017] The photovoltaic module according to this application includes the aforementioned nameplate; the photovoltaic module is a double-sided double-glass module or a double-sided single-glass module.

[0018] To achieve the above objectives, according to another aspect of this application, an application of a nameplate and its preparation method is also provided.

[0019] According to the nameplate and preparation method of this application, it is used in solar photovoltaic modules composed of PERC cells, TOPCon cells, HJT cells, IBC cells or HBC / TBC cells.

[0020] Beneficial effects: In this embodiment, a split and embedded transparent structure is adopted, using a first component and a second component, wherein the second component includes an adhesive layer; when the nameplate is not in use, the first component and the second component are stored separately; when the nameplate is in use, the first component and the second component are bonded together; the light transmittance of the nameplate is 80%~90%, achieving the purpose of adapting to various usage environment requirements and facilitating installation; and by optimizing the material formulation of the first component and the second component, the technical problems of weather resistance and adhesion of existing nameplates in high temperature, high humidity, and high salt spray application scenarios are solved, thereby achieving the technical effect of improving the service life of the nameplate. Attached Figure Description

[0021] Figure 1 This is a schematic cross-sectional view of the first component of the nameplate of the present invention; Figure 2 This is a schematic cross-sectional view of the second component of the nameplate of the present invention; Figure 3 This is a schematic diagram of the connection structure of the nameplate of the present invention; Figure 4 This is a schematic cross-sectional view of the nameplate of the present invention; Figure 5 This is a schematic cross-sectional view of the nameplate of the present invention applied to a double-sided double-glass module; and Figure 6 This is a schematic cross-sectional view of the nameplate of the present invention applied to a double-sided single-glass module.

[0022] The attached figures are labeled as follows: 1. Nameplate; 10. First component; 101. First functional layer; 102. First substrate layer; 103. Second functional layer; 1031. Diffusion layer; 1032. Printing layer; 20. Second component; 201. First adhesive layer; 202. Second substrate layer; 203. Second adhesive layer; 30. First release film; 40. Second release film; 50. Glass front panel; 60. First adhesive film; 70. Battery cells; 80. Second adhesive film; 90. Glass back panel; 100. Transparent back panel. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] like Figure 1-6 As shown, this application relates to a nameplate and its preparation method, and a photovoltaic module. Figure 1-4 As shown, the nameplate includes: a first component 10 and a second component 20, wherein the second component 20 includes an adhesive layer; the first component 10 serves to support the printing of patterns / text; the second component 20 serves to bond the first component 10 to the glass back panel 90 or the surface of the back panel, and to block ultraviolet rays from the back.

[0028] When the nameplate is not in use, the first component 10 and the second component 20 are stored separately; when the nameplate is in use, the first component 10 and the second component 20 are bonded together. By adopting a separate storage method, the first component 10 and the second component 20 are produced and stored as two independent rolls or sheets, and are only combined before use. This enables production flexibility, allowing the two components to be produced on different production lines or even by different manufacturers, optimizing the supply chain and production efficiency; it ensures quality, preventing the adhesive layer from prematurely bonding to the functional layer due to pressure and temperature changes during storage and transportation, thus avoiding product scrap; it is easy to customize, meeting the needs of various application scenarios. It achieves flexible use while also being easy to store and assemble.

[0029] By adopting a split structure for the first component 10 and the second component 20, the effect of facilitating transportation and storage is achieved.

[0030] The nameplate has a light transmittance of 80% to 90%. Reducing the shading area of ​​the nameplate ensures good light transmission and guarantees the efficiency of the photovoltaic module.

[0031] As can be seen from the above description, this application achieves the following technical effects: In this embodiment, a split and embedded transparent structure is adopted, using a first component and a second component, wherein the second component includes an adhesive layer; when the nameplate is not in use, the first component and the second component are stored separately; when the nameplate is in use, the first component and the second component are bonded together; the light transmittance of the nameplate is 80%~90%, which is significantly improved compared to traditional nameplates based on silver paper, achieving the purpose of adapting to various usage environment requirements and facilitating installation, thereby achieving the technical effect of improving the service life of the nameplate, and thus solving the technical problems of weather resistance and adhesion of existing nameplates in high temperature, high humidity, and high salt spray application scenarios.

[0032] Furthermore, the first component 10 is provided with a first functional layer 101, a first substrate layer 102 and a second functional layer 103 stacked from top to bottom; wherein, the second functional layer 103 includes: a diffusion layer 1031 connected to the first substrate layer 102 on the side away from the first functional layer 101, and the diffusion layer 1031 is connected to the printing layer 1032. The second component 20 is connected to the lower surface of the first component 10; the second component 20 is provided with a first adhesive layer 201, a second substrate layer 202 and a second adhesive layer 203 stacked from top to bottom; When the first component 10 and the second component 20 are in an unused state, a first release film 30 is provided on the upper surface of the first adhesive layer 201, and a second release film 40 is provided on the lower surface of the second adhesive layer 203, so that the first component 10 and the second component 20 can be stored separately. It is understood that the first component 10 and the second component 20 can be stored separately before use, and then combined during construction, which facilitates storage and extends service life.

[0033] Specifically, the first functional layer 101 is located on the top layer and is directly exposed to the outside; it serves as a protective layer and / or a decorative layer and has one or more of the following properties: abrasion resistance, scratch resistance, and maintaining a new appearance for a long time; weather resistance, resistance to ultraviolet rays, high temperatures, and humidity, and prevention of fading or aging; chemical corrosion resistance, resistance to oil stains, cleaning agents, etc.; special textures, such as brushed metal, matte, high gloss, texture, etc., to enhance the appearance.

[0034] The first substrate layer 102, located in the middle, serves as a supporting structure, providing primary mechanical strength and shape stability. It is made of a robust and durable material, such as rigid plastics (PC, PMMA / acrylic), etc. Preferably, the thickness of the first substrate layer 102 is 50-150 micrometers. This ensures good structural strength while also allowing for a variety of sizes to be selected.

[0035] The second functional layer 103 is located at the bottom and is in contact with the second component 20. It is itself a composite layer containing two sub-layers: a diffusion layer 1031, which is in close contact with the first substrate layer 102 and whose main function is to evenly disperse light. If there is a light source (backlight) behind the nameplate 1, it can avoid bright spots or uneven "light spots" and make the light emission effect soft and uniform.

[0036] The printing layer 1032, located below the diffusion layer 1031, is the final pattern and information layer. It is used to print text, logos, and other information.

[0037] The first functional layer 101 and the second functional layer 103 are both transparent coatings, and the first substrate layer 102 is a high-transmittance organic film material.

[0038] The first adhesive layer 201 is located on the top layer and is in direct contact with the printed layer 1032 of the first component 10, which can bond the two components together. It is bonded to the printed layer 1032 of the first component 10 through processes including but not limited to: hot pressing, pressure-sensitive bonding or other bonding processes.

[0039] The second substrate layer 202 is located in the middle layer and is usually a material with a certain thickness and toughness, such as PET film or foam tape. It can not only enhance the overall structure, but its viscoelasticity can also adapt to the slight unevenness of the surface to be installed, ensuring a firm bond.

[0040] The second adhesive layer 203 is located at the bottom and is in direct contact with the surface of the device being installed, serving as the adhesive layer for the final installation of the nameplate 1. It is typically a high-tack pressure-sensitive adhesive and comes with a release liner, which is removed before use.

[0041] The first release film 30 covers the first adhesive layer 201 of the second component 20 to prevent it from accidentally adhering to dust or prematurely bonding with the first component 10 during storage.

[0042] The second release film 40 covers the second adhesive layer 203 of the second component 20, protecting the strong adhesive layer for final installation.

[0043] Preferably, the thickness of the first release film 30 and the second release film 40 is 10-50 μm.

[0044] like Figure 3 As shown, the transparent embedded component nameplate 1 of this application is formed by bonding the second component 20 to the printed layer 1032 of the first component 10 after removing the release film on both sides.

[0045] Furthermore, the first functional layer 101 includes: a matrix resin, a first additive, and a diluent; The matrix resin is one or more of the following: fluorinated resin, acrylic resin, polyester resin, and epoxy resin. Specifically, the matrix resin is the main component of the film-forming material.

[0046] Preferably, the fluorinated resin is one or more of polytetrafluoroethylene resin, polychlorotrifluoroethylene resin and polyvinylidene fluoride resin containing hydroxyl side chains, and more preferably, it is a FEVE type resin containing hydroxyl groups. Preferably, the acrylic resin is a solvent-based hydroxyl acrylic resin; Polyester resins include polyurethane resins and polycarbonates. Preferably, the polyurethane resins include one or more of solvent-based polyester polyurethanes and polyether polyurethanes. The polycarbonate is a bisphenol A type polycarbonate. More preferably, the polyester resin is a saturated polyester resin containing terminal hydroxyl functional groups. Preferably, the epoxy resin is a bisphenol A type epoxy resin.

[0047] The matrix resin provides the first functional layer with excellent weather resistance, abrasion resistance, toughness, high gloss, UV resistance, water repellency, and stain resistance.

[0048] The first auxiliary agent is one or more of the following: dispersant, leveling agent, ultraviolet absorber, catalyst, and crosslinking agent; The crosslinking agent is one or more of aliphatic or alicyclic isocyanates, and the crosslinking agent can be selected from one or more of the following: HDI (hexamethylene diisocyanate), IPDI (isoflurone diisocyanate), H6XDI (hydrogenated diphenylmethylene diisocyanate), HMDI (dicyclohexylmethane-4,4'-diisocyanate), and TMXDI (tetramethyl isophenylmethylene diisocyanate). The crosslinking agent reacts chemically with the active groups (such as hydroxyl groups) in the resin to form a three-dimensional network structure, which can greatly improve the hardness, chemical resistance, scratch resistance and adhesion of the coating.

[0049] It is important to know that leveling agents are non-silicone and can be, but are not limited to, modified polyacrylates.

[0050] Preferably, the ultraviolet absorber includes one or more of triazine, benzophenone, and benzotriazole.

[0051] The diluents are xylene, butyl acetate, propyl acetate, ethyl acetate, ethyl triethoxypropionate, propylene carbonate, diisobutyl ketone, cyclohexanone, butanone, and propylene glycol methyl ether acetate.

[0052] Preferably, the catalyst belongs to the organotin or organobismuth family, and may include, but is not limited to, stannous octoate, dibutyltin dilaurate, di(dodecyl sulfide)dibutyltin, bismuth isooctanoate, bismuth laurate, and bismuth neodecanoate.

[0053] First additive: Dispersant / leveling agent ensures that the coating forms a uniform, smooth, and defect-free film during application.

[0054] The UV absorber actively absorbs ultraviolet light, protecting the underlying ink and substrate and preventing aging and yellowing.

[0055] Diluent: Adjusts the viscosity of the slurry to make it suitable for precision processes such as microgravure coating.

[0056] The dispersant is one or more of the following: acidic polymers, polycarboxylic acid polymers, and polyurethane polymers.

[0057] Furthermore, the thickness of the first functional layer 101 is 3-20 μm. By weight, the first functional layer comprises: 70-90 parts of matrix resin, 6-15 parts of first additive, and 10-30 parts of diluent. It is understood that by using a thickness of 3-20 μm, it is possible to ensure that the coating is sufficiently tough without excessively affecting the material's flexibility and overall thickness; simultaneously, by using a formulation within the aforementioned range, the desired effect of preparing the first functional layer 101 can be achieved. The 6-15 parts of the first additive include: 5-10 parts of crosslinking agent and 1-5 parts of functional additive.

[0058] Furthermore, the first substrate layer 102 is a PET film, PE film, PP film, or PI film; The lower surface of the first substrate layer 102 is coated with a PVA primer, with a coating amount of 0.5-2 g / m². 2 Understandably, PET film is the most commonly used because it achieves the best balance between mechanical strength, transparency, stability, and cost; PI film is used in applications requiring extreme high temperatures.

[0059] A very thin layer of polyvinyl alcohol (PVA) primer is applied to the lower surface of the first substrate layer 102 to enhance adhesion. The PVA primer acts as a "bridge" between the PET substrate and the subsequent PVA diffusion layer 1031. PET itself is hydrophobic, while the PVA diffusion layer 1031 is hydrophilic, resulting in poor direct adhesion. The PVA primer perfectly solves the problem of interfacial incompatibility, preventing peeling between layers.

[0060] Furthermore, the thickness of the diffusion layer 1031 is 20-50 μm, and the diffusion layer 1031 includes: PVA, a second auxiliary agent, and a diluent. By weight, the diffusion layer includes: 10-30 parts of PVA, 1-10 parts of the second auxiliary agent, and 50-90 parts of the diluent; wherein, the degree of polymerization of PVA is 1500-3500; the second auxiliary agent is one or more of acetylenic diol wetting agents and polyether modified siloxane polymers; and the diluent is deionized water.

[0061] It is understandable that polyvinyl alcohol is a film-forming material with a degree of polymerization of 1500-3000. High-polymerization-degree long-chain polyvinyl alcohol can form films with higher strength and toughness.

[0062] The second additive includes a wetting agent to ensure that the water-based slurry can be evenly spread on the PVA base coating and to avoid pinholes.

[0063] The diffusion layer 1031 is a PVA film, which is prepared by coating and drying PVA slurry and the above formula.

[0064] Specifically, by setting the thickness within the range of 20-50 μm, effective light diffusion can be achieved. If it is too thin, the effect will be poor; if it is too thick, it will affect the light transmittance and cost.

[0065] Furthermore, the printed layer 1032 includes: an adhesive, a crosslinking agent, a filler, a third auxiliary agent, and a diluent; The adhesive is a composition of low-polymerization-degree polyvinyl alcohol and polyvinyl butyral. The filler is one or both of fumed silica or alumina; The third auxiliary agent includes dispersants, defoamers, wetting agents, crosslinking agents, and antistatic agents. The crosslinking agent is an isocyanate compound.

[0066] Understandably, low-polymerization-degree PVA provides good adhesion to the underlying diffusion layer 1031 and serves as a carrier for pigments.

[0067] PVB (polyvinyl butyral) introduces excellent toughness and impact resistance, and serves as a reaction carrier for the crosslinking agent. The hydroxyl groups on the PVB molecular chain react with the isocyanate crosslinking agent, causing the printed layer 1032 itself to change from thermoplastic to thermosetting, thus becoming solvent-resistant, wear-resistant, and having high hardness.

[0068] Fillers (fumed silica / alumina) can increase the microporous structure, forming fine and intricate pores in the coating; they can quickly absorb ink, preventing ink bleeding and color mixing during inkjet printing; and because the ink is quickly fixed, very high resolution (such as 1200 dpi) printing of patterns, text, or QR codes can be achieved, ensuring that the information can be stably and quickly identified.

[0069] The two-day curing process is a crucial cross-linking process, during which the cross-linking agent reacts fully with PVA / PVB, allowing the printed layer 1032 to achieve its final physical and chemical properties (scratch resistance, solvent resistance).

[0070] Preferably, the crosslinking agent can be one or more of HDI (hexamethylene diisocyanate), IPDI (isoflurone diisocyanate), and H6XDI (hydrogenated dimethyl diisocyanate).

[0071] Furthermore, the dispersant is one or more of polycarboxylate salts and sodium hexametaphosphate.

[0072] Furthermore, the defoamer can be an organosilicon-based agent to eliminate bubbles generated during preparation and prevent pinholes in the coating.

[0073] Furthermore, the wetting agent is a nonionic surfactant, such as fatty alcohol polyoxyethylene ether, which can reduce the surface tension of the coating, accelerate the spreading of water-based ink on the coating surface, and shorten the penetration path.

[0074] Furthermore, the antistatic agent is an amphoteric type, such as cocamidopropyl betaine or lauryl imidazoline betaine, which does not conflict with fumed silica, PVA, or other components, and can reduce the displacement of ink dots caused by static electricity on the plastic substrate during printing.

[0075] Furthermore, the thickness of the printed layer 1032 is 10-25 μm. By weight, the printing layer comprises: 5-25 parts PVA, 1-10 parts PVB, 2-15 parts third additive, 20-40 parts filler, and 15-40 parts diluent. It is understood that this achieves the desired effect of preparing the printing layer 1032, and the printing layer 1032 is designed as a porous, highly cross-linkable composite structure, satisfying both the process requirements of inkjet printing (fast drying, high definition) and the performance requirements of the final product (durability, scratch resistance). The 2-15 parts of the third additive include: 1-5 parts cross-linking agent and 1-10 parts additive.

[0076] Preferably, the degree of polymerization of PVA is 400-2000, and the molecular weight of PVB is 20,000-80,000. Blending PVB with PVA can improve its hardness and transparency, while also improving its mechanical properties.

[0077] Furthermore, the first adhesive layer 201 and the second adhesive layer 203 comprise: silicone rubber, tackifying resin, and a fourth additive. This ensures a good bonding effect.

[0078] Preferably, the fourth auxiliary agent includes one or more of the following: anchoring agent, crosslinking agent, catalyst, and ultraviolet absorber.

[0079] Furthermore, the silicone rubber is composed of hydroxyl or vinyl-terminated R1R2SiO units, typically containing Me2SiO units, PhMeSiO units, or Ph2SiO units, or a combination of two types of units.

[0080] Preferably, the tackifying resin is an addition-type silicone resin. More specifically, the addition-type silicone resin is of the methyl type.

[0081] Preferably, the anchoring agent is a difunctional alkoxysilane.

[0082] Preferably, the crosslinking agent is a hydrogen-containing silicone oil.

[0083] Preferably, the catalyst can be a peroxide sulfidation system under high-temperature curing conditions.

[0084] Furthermore, the peroxide is preferably BPO. The catalyst can also be a platinum-based catalyst that cures under low-temperature conditions. Further, the platinum-based catalyst is preferably a Karstedt catalyst. The ultraviolet absorber includes one or more of triazine, benzophenone, and benzotriazole derivatives. Furthermore, the dry adhesive content of the first adhesive layer 201 and the second adhesive layer 203 is 10-40 g / m². 2 The coating adhesive comprises the following raw materials in parts by weight: 40-60 parts silicone rubber, 30-50 parts tackifying resin, 1-10 parts fourth additive, and 10-30 parts diluent. It is understood that this enables the preparation of the desired adhesive layer.

[0085] The dry adhesive amount mentioned in this solution refers to the value calculated by multiplying the total mass of adhesive applied per unit area of ​​the substrate by the corresponding solid content of the adhesive when applying solvent-containing adhesive to the substrate surface.

[0086] In this technical solution embodiment, the coating thickness and the amount of dry adhesive are numerically equal, therefore, the coating thickness is used uniformly in the embodiments. In this technical solution, the amount of dry adhesive (coating thickness) has a direct impact on the bonding strength of the adhesive layer. Within a certain range, as the amount of dry adhesive (coating thickness) increases, the bonding strength of the adhesive layer gradually increases.

[0087] This application also relates to a method for preparing a nameplate, including: S101. At room temperature, mix all materials of the first functional layer 101 according to the formula, add diluent to adjust the viscosity, and stir in a closed manner for 30-60 minutes; pass the uniformly stirred coating through a filter and circulate it for 10-30 minutes. Specifically, at room temperature, the materials of the first functional layer 101 are mixed according to the formula, a diluent is added to adjust the viscosity of the slurry for 30-35 seconds, and the mixture is stirred in a closed manner for 30-60 minutes; the uniformly stirred coating is then passed through a 50-100 mesh filter and circulated for 10 minutes. S102. The formulation coating of the first functional layer 101 is transferred to the first substrate layer coating surface and then dried; on the other side, a PVA primer is applied using a micro-grooving roller and then dried. Specifically, taking a PET substrate layer as an example, the first coating surface of the substrate layer is subjected to online corona treatment; the first coating surface is then coated with a micro-gravure coating process to transfer the first functional layer 101 formulation coating to the first coating surface of the substrate layer; subsequently, it enters the drying tunnel for drying treatment; the coating speed is 50-80m / min. Apply a PVA primer to the other side of the semi-finished product that has been coated with the first functional layer 101 using a specified micro-grooved roller, baking at a temperature of 80-120 degrees Celsius and a coating speed of 10-20 m / min. S103. At room temperature, mix the diffusion layer 1031 slurry according to the ratio, add diluent to adjust the viscosity, and stir in a closed manner for 30-60 minutes; pass the uniformly stirred coating through a filter and circulate it for 10-30 minutes; use a microgravure coating device to transfer the slurry to the surface of the primer, and then dry it. Specifically, at room temperature, the diffusion layer 1031 slurry is mixed according to the specified ratio, and a diluent is added to adjust the viscosity of the slurry for 20-40 seconds. The mixture is then stirred in a closed manner for 30-60 minutes. The uniformly stirred coating is then passed through a 50-100 mesh filter and circulated for 10 minutes. The slurry is then transferred to the primer surface using a microgravure coating machine and subsequently dried in an oven. The coating speed is 20-40 m / min. S104. Under room temperature conditions, the printing layer 1032 slurry is mixed according to the formula, and a diluent is added to adjust the viscosity. The uniformly stirred coating is passed through a filter and circulated for 10-30 minutes. The prepared slurry is transferred to the surface of the diffusion layer 1031 through a microgravure coating process. Then, it is dried and left to mature for 2 days to obtain the first component 10. Specifically, at room temperature, the printing layer 1032 slurry is mixed according to the specified ratio, and a thinner is added to adjust the slurry viscosity for 25-40 seconds. The mixture is then stirred in a closed-loop system for 30-60 minutes. The uniformly stirred coating is then passed through a 50-100 mesh filter and circulated for 10 minutes. The prepared slurry is then transferred to the surface of the diffusion layer 1031 using a microgravure coating process. Subsequently, it undergoes drying in an oven at a speed of 20-30 m / min. Finally, it is cured at 50 degrees Celsius for 2 days. S105. The second substrate layer is subjected to online corona treatment on both sides, coated with silicone pressure-sensitive adhesive by micro-grooving roller, and then laminated with fluorine release film. After drying, the second component 20 is obtained. Specifically, the substrate of the second component 20 is prepared by double-sided online corona treatment, coating with silicone pressure-sensitive adhesive by micro-grooving roller, and then composited with fluorine release film; it is then dried in an oven at a temperature of 80-150℃. S106. Cut the first component 10 and the second component 20 to the specified size.

[0088] Specifically, the first component 10 and the second component 20 are cut to the specified size, and the nameplate 1 pattern, text, QR code and barcode information are printed on the second functional layer 103 by inkjet printing; the release film of the second component 20 is peeled off, one side is pasted on the printed layer 1032 of the first component 10, and the other side is pasted on the designated area of ​​the glass back panel 90.

[0089] Specifically, S101, at room temperature, mix all materials of the first functional layer 101 according to the formula, add diluent to adjust the viscosity of the slurry to 30-35 seconds using a 4# Zein cup, and stir in a closed manner for 30-60 minutes; pass the uniformly stirred coating through a 50-100 mesh filter and circulate it for 10 minutes.

[0090] S102. Taking a PET substrate layer as an example, the first coating layer of the substrate layer undergoes online corona treatment with a power of 2.0KW; the first coating layer is then coated using a micro-gravure coating process to transfer the first functional layer 101 formulation coating to the first coating layer of the substrate; subsequently, it enters a drying tunnel with a total of 14 oven sections, with temperatures of 60-80 degrees Celsius for section 1, 70-90 degrees Celsius for section 2, 100-140 degrees Celsius for section 3, 140-170 degrees Celsius for sections 4-6, 170-185 degrees Celsius for sections 7-11, 140-160 degrees Celsius for section 12, 100-130 degrees Celsius for section 13, and 60-80 degrees Celsius for section 14; the coating speed is 50-80 m / min.

[0091] Apply a PVA primer to the other side of the semi-finished product that has been coated with the first functional layer 101 using a 100-mesh micro-grooved roller, bake at a temperature of 80-120 degrees Celsius, and coat at a speed of 10-20 m / min.

[0092] S103. Under room temperature conditions, mix the diffusion layer 1031 slurry according to the formula, add diluent to adjust the viscosity of the slurry to 20-40 seconds using a #4 Zein cup, and stir in a closed manner for 30-60 minutes; pass the uniformly stirred coating through a 50-100 mesh filter and circulate it for 10 minutes; use a micro-gravure coating device to transfer the slurry to the surface of the primer, and then put it into the drying tunnel for drying treatment. The drying tunnel has a total of 17 oven sections, with temperatures of 60-70 degrees Celsius for section 1, 70-80 degrees Celsius for section 2, 80-90 degrees Celsius for section 3, 100-120 degrees Celsius for sections 4-14, 100-110 degrees Celsius for section 15, 80-90 degrees Celsius for section 16, and 50-80 degrees Celsius for section 17; the coating speed is 20-40 m / min.

[0093] S104. Under room temperature conditions, mix the printing layer 1032 slurry according to the specified ratio, add diluent to adjust the slurry viscosity to 25-40 seconds using a #4 Zein cup, and stir in a closed container for 30-60 minutes; pass the uniformly stirred coating through a 50-100 mesh filter and circulate it for 10 minutes; transfer the prepared slurry to the surface of the diffusion layer 1031 using a microgravure coating process; then proceed to the drying oven with a total of 14 sections. The temperatures are as follows: Section 1: 60-70 degrees Celsius; Section 2: 70-80 degrees Celsius; Section 3: 80-90 degrees Celsius; Sections 4-6: 100-120 degrees Celsius; Sections 7-11: 120-130 degrees Celsius; Section 12: 100-120 degrees Celsius; Section 13: 90-110 degrees Celsius; Section 14: 60-80 degrees Celsius; Coating speed: 20-30 m / min; Afterwards, it is placed in a 50-degree Celsius curing environment for 2 days.

[0094] S105 and the second component 20 are prepared by double-sided online corona treatment with a power of 2.0KW, coating with silicone pressure-sensitive adhesive by a 30-line micro-grooving roller, and then respectively composited with fluorine release film; dried in an oven at a temperature of 80-150℃.

[0095] S106. The first component 10 and the second component 20 are cut to the specified size, and the nameplate 1 pattern, text, QR code, barcode and other information are printed on the second functional layer 103 by inkjet printing; the release film of the second component 20 is peeled off, one side is pasted on the printed layer 1032 of the first component 10, and the other side is pasted on the designated area of ​​the glass back panel 90.

[0096] like Figure 5-6 As shown, this application also relates to a photovoltaic module, including the nameplate 1 mentioned above; the photovoltaic module is a double-sided double-glass module or a double-sided single-glass module.

[0097] Specifically, the embedded stealth nameplate 1 of this application is suitable for encapsulation of bifacial double-glass and bifacial single-glass photovoltaic modules. The nameplate 1 of this application is encapsulated inside the module.

[0098] Double-sided double-glass module: from top to bottom, the components are: front glass panel 50, first encapsulant film 60, solar cell 70, second encapsulant film 80, nameplate 1, and back glass panel 90.

[0099] Double-sided single-glass module: From top to bottom, it consists of a glass front panel 50, a first encapsulating film 60, solar cells 70, a second encapsulating film 80, a nameplate 1, and a transparent (grid) back panel 100. The nameplate 1 is optimally positioned between the solar cell strings. The adhesive layer contacts the inner side of the glass back panel 90 or a designated area within the inner coating of the transparent (grid) back panel, and the first functional layer 101 contacts the lower encapsulating film of the solar cells 70.

[0100] This application also relates to the application of a nameplate or nameplate preparation method in solar photovoltaic modules composed of PERC cells, TOPCon cells, HJT cells, IBC cells or HBC / TBC cells.

[0101] To better understand this application, the following specific embodiments are provided for further explanation: Example 1 The thickness of the first functional layer 101 is 3 μm. The coating slurry comprises the following raw materials in parts by weight: fluorinated resin: 55 parts, polyester resin: 15 parts, crosslinking agent: 7.5 parts, dispersant: 0.8 parts, leveling agent: 0.5 parts, and diluent: 21.2 parts. The fluorinated resin is trifluorochloroethylene (Taiwan Chang Hsing), the polyester resin is Lancolu, the crosslinking agent is HDI type isocyanate (Covestro), the dispersant is BYK-111, the leveling agent is fluorinated modified acrylate (Dongguan Aishike Polymer Materials Co., Ltd.), and the diluent is propylene glycol methyl ether acetate (Jiangsu Tianyin).

[0102] The first substrate layer 102 is made of 125μm thick UV-resistant transparent PET (Dongcai), and requires double-sided corona treatment. The side in contact with the second functional layer 103 is coated with a PVA primer (BASF) at a coating amount of 0.5g / m². 2 .

[0103] The diffusion layer 1031 has a thickness of 50 μm. The coating slurry comprises the following raw materials in parts by weight: PVA: 10 parts, second auxiliary agent: 1 part, and diluent: 89 parts. The degree of polymerization of PVA (Anhui Viagra) is 3500. The second auxiliary agent is an acetylenic diol wetting agent (Evonik). The diluent is deionized water.

[0104] The printed layer 1032 has a thickness of 10 μm. The coating slurry contains the following raw materials in parts by weight: PVA: 10 parts, PVB: 5 parts, crosslinking agent: 4 parts, third auxiliary agent: 2 parts, filler: 40 parts, and diluent: 39 parts. The PVA (Sinopec) used is PVA with a degree of polymerization of 400. The PVB is from Anhui Wanwei High-Tech Materials. The crosslinking agent (Covestro) is an HDI type isocyanate. The third auxiliary agent includes a dispersant and a nonionic surfactant. The dispersant is a carboxylate oligomer (BASF). The nonionic surfactant is a fatty alcohol polyoxyethylene ether (Dow Chemical). The filler is fumed silica (Evonik). The diluent is isopropanol (Shandong Xuchen Chemical Technology Co., Ltd.).

[0105] The release film for the second component is a single-sided fluorine release film based on PET substrate (Kunshan Sibeike Precision Composite Materials Co., Ltd.). It has a thickness of 50 μm and a release force of 5-8 gf / inch.

[0106] The adhesive layer of the second component has a thickness of 40 μm. The slurry contains the following raw materials in parts by weight: 45 parts silicone rubber, 35 parts tackifying resin, 0.2 parts anchoring agent, 0.4 parts crosslinking agent, 0.4 parts catalyst, 3.5 parts UV absorber, and 15.5 parts diluent. The silicone rubber is XIAMETER™ (Dow Chemical), the tackifying resin is Shin-Etsu Chemical's KE-914, the anchoring agent is Wacker M 4640, the crosslinking agent is Dow Chemical's SYL-OFF™ 397, and the catalyst is Wacker ELASTOSIL® PT 62 with a platinum content of 4000 ppm. The UV diluent is Lyon UV-400. The diluent is toluene.

[0107] The second substrate layer 202 of the second component is made of UV-resistant transparent PET (Dongcai) with a thickness of 25μm.

[0108] Example 2 The first functional layer 101 has a thickness of 10 μm. The coating slurry comprises the following raw materials in parts by weight: acrylic resin: 65 parts, polyester resin: 15 parts, crosslinking agent: 4.5 parts, dispersant: 0.8 parts, leveling agent: 0.5 parts, and diluent: 14.2 parts. The acrylic resin (Andeli), polyester resin (Lankel), crosslinking agent (HDI type isocyanate, Covestro), dispersant (Efcona), leveling agent (fluorinated acrylate, Dongguan Aishike Polymer Materials Co., Ltd.), and diluent (propylene glycol methyl ether acetate, Jiangsu Tianyin) are used.

[0109] The first substrate layer 102 is made of 50μm thick UV-resistant transparent PET (Dongcai), and requires double-sided corona treatment. A PVA primer (BASF) is applied to the side in contact with the second functional layer, with a coating amount of 0.5g / m². 2 .

[0110] The diffusion layer 1031 has a thickness of 20 μm. The coating slurry comprises the following raw materials in parts by weight: PVA: 6 parts, second auxiliary agent: 1 part, and diluent: 93 parts. The PVA (Shandong Yaotong Industry) has a degree of polymerization of 1500. The second auxiliary agent is an acetylenic diol wetting agent (Evonik). The diluent is deionized water.

[0111] The printed layer 1032 has a thickness of 25 μm. The coating slurry contains the following raw materials in parts by weight: PVA: 25 parts, PVB: 10 parts, crosslinking agent: 4 parts, third auxiliary agent: 2 parts, filler: 20 parts, and diluent: 39 parts. The PVA (Sinopec) used is PVA with a polymerization degree of 400. The PVB is from Anhui Wanwei High-Tech Materials. The crosslinking agent (Covestro) is an HDI type isocyanate. The third auxiliary agent includes a dispersant and a nonionic surfactant. The dispersant is a carboxylate oligomer type (BASF). The nonionic surfactant is a fatty alcohol polyoxyethylene ether (Dow Chemical). The filler is fumed silica (Evonik). The diluent is isopropanol (Shandong Xuchen Chemical Technology Co., Ltd.).

[0112] The release film for the second component is a single-sided fluorine release film based on a PET substrate (Kunshan Sibeike Precision Composite Materials Co., Ltd.). It is RT50FL125 with a thickness of 50μm and a release force of 5-8gf / inch.

[0113] The adhesive layer of the second component has a thickness of 10 μm. The slurry contains the following raw materials in parts by weight: 45 parts silicone rubber, 35 parts tackifying resin, 0.2 parts anchoring agent, 0.4 parts crosslinking agent, 0.4 parts catalyst, 3.5 parts UV absorber, and 15.5 parts diluent. The silicone rubber is XIAMETER™ (Dow Chemical), the tackifying resin is Shin-Etsu KE-914, the anchoring agent is Wacker M 4640, the crosslinking agent is Dow Chemical SYL-OFF™ 397, and the catalyst is Wacker ELASTOSIL® PT 62 with a platinum content of 4000 ppm. The UV diluent is Lyon UV-400. The diluent is toluene.

[0114] The second substrate layer 202 of the second component is made of UV-resistant transparent PET (Dongcai) with a thickness of 25μm.

[0115] Example 3 The first functional layer 101 has a thickness of 3 μm. The coating slurry comprises the following raw materials in parts by weight: fluorinated resin: 55 parts, polyester resin: 15 parts, crosslinking agent: 7.5 parts, dispersant: 0.8 parts, leveling agent: 0.5 parts, and diluent: 21.2 parts. The fluorinated resin is trifluorochloroethylene (Taiwan Chang Hsing), the polyester resin is Lancolu, the crosslinking agent is HDI type isocyanate (Covestro), the dispersant is BYK-111, the leveling agent is fluorinated modified acrylate (Dongguan Aishike Polymer Materials Co., Ltd.), and the diluent is propylene glycol methyl ether acetate (Jiangsu Tianyin).

[0116] The first substrate layer 102 is made of 125μm thick UV-resistant transparent PET (Dongcai), and requires double-sided corona treatment. A PVA primer (BASF) is applied to the side in contact with the second functional layer 103, with a coating amount of 0.5g / m². 2 .

[0117] The diffusion layer 1031 has a thickness of 50 μm. The coating slurry comprises the following raw materials in parts by weight: PVA: 10 parts, second auxiliary agent: 1 part, and diluent: 89 parts. The degree of polymerization of PVA (Anhui Viagra) is 3500. The second auxiliary agent is an acetylenic diol wetting agent (Evonik). The diluent is deionized water.

[0118] The printed layer 1032 has a thickness of 25 μm. The coating slurry contains the following raw materials in parts by weight: PVA: 25 parts, PVB: 10 parts, crosslinking agent: 4 parts, third auxiliary agent: 2 parts, filler: 20 parts, and diluent: 39 parts. The PVA (Sinopec) used is PVA with a polymerization degree of 400. The PVB is from Anhui Wanwei High-Tech Materials. The crosslinking agent (Covestro) is an HDI type isocyanate. The third auxiliary agent includes a dispersant and a nonionic surfactant. The dispersant is a carboxylate oligomer type (BASF). The nonionic surfactant is a fatty alcohol polyoxyethylene ether (Dow Chemical). The filler is fumed silica (Evonik). The diluent is isopropanol (Shandong Xuchen Chemical Technology Co., Ltd.).

[0119] The release film for the second component is a single-sided fluorine release film based on PET substrate (Kunshan Sibeike Precision Composite Materials Co., Ltd.). It has a thickness of 50 μm and a release force of 5-8 gf / inch.

[0120] The adhesive layer of the second component has a thickness of 40 μm. The slurry contains the following raw materials in parts by weight: 30 parts silicone rubber, 30 parts tackifying resin, 0.2 parts anchoring agent, 1.2 parts crosslinking agent, 3.0 parts UV absorber, and 35.6 parts diluent. The silicone rubber is from Anhui Mingyi Silicon Industry, the tackifying resin is Wacker's SILRES® M 51E methyl silicone resin, the anchoring agent is Wacker M 4640, and the crosslinking agent is benzoyl peroxide (Guangzhou Aohong Biotechnology Co., Ltd.). The UV diluent is Lianlong UV-400. The diluent is toluene.

[0121] The second substrate layer 202 of the second component is made of UV-resistant transparent PET (Dongcai) with a thickness of 25μm.

[0122] Example 4 The first functional layer has a thickness of 20 μm. The coating slurry comprises the following raw materials in parts by weight: fluorinated resin: 55 parts, polyester resin: 15 parts, crosslinking agent: 7.5 parts, dispersant: 0.8 parts, leveling agent: 0.5 parts, and diluent: 21.2 parts. The fluorinated resin is trifluorochloroethylene (Taiwan Chang Hsing), the polyester resin is Lancolu, the crosslinking agent is HDI type isocyanate (Covestro), the dispersant is BYK-111, the leveling agent is fluorinated modified acrylate (Dongguan Aishike Polymer Materials Co., Ltd.), and the diluent is propylene glycol methyl ether acetate (Jiangsu Tianyin).

[0123] The first substrate layer is a 150μm thick BOPP optical film (Zhejiang Dasoutheast), which requires double-sided corona treatment. The side in contact with the second functional layer is coated with a PVA primer (BASF) at a coating amount of 0.5g / m². 2 .

[0124] The diffusion layer has a thickness of 30 μm. The coating slurry contains the following raw materials in parts by weight: PVA: 10 parts, second auxiliary agent: 1 part, diluent: 89 parts. The degree of polymerization of PVA (Anhui Viagra) is 3500. The second auxiliary agent is an acetylenic diol wetting agent (Evonik). The diluent is deionized water.

[0125] The printing layer has a thickness of 15 μm. The coating slurry contains the following raw materials in parts by weight: PVA: 20 parts, PVB: 10 parts, crosslinking agent: 4 parts, third auxiliary agent: 2 parts, filler: 20 parts, and diluent: 44 parts. The PVA (Sinopec) used is PVA with a polymerization degree of 400. The PVB is from Anhui Wanwei High-Tech Materials. The crosslinking agent (Covestro) is an HDI type isocyanate. The third auxiliary agent includes a dispersant and a nonionic surfactant. The dispersant is a carboxylate oligomer type (BASF). The nonionic surfactant is a fatty alcohol polyoxyethylene ether (Dow Chemical). The filler is fumed silica (Evonik). The diluent is isopropanol (Shandong Xuchen Chemical Technology Co., Ltd.).

[0126] The release film for the second component is a single-sided fluorinated release film based on a PET substrate (Suzhou Hengcong Fluorinated Release Film). It has a thickness of 50μm and a release force of 10-20gf / inch.

[0127] The adhesive layer of the second component has a thickness of 10 μm. The slurry contains the following raw materials in parts by weight: 45 parts silicone rubber, 35 parts tackifying resin, 0.2 parts anchoring agent, 0.4 parts crosslinking agent, 0.4 parts catalyst, 3.5 parts UV absorber, and 15.5 parts diluent. The silicone rubber is XIAMETER™ (Dow Chemical), the tackifying resin is Shin-Etsu Chemical's KE-914, the anchoring agent is Wacker M 4640, the crosslinking agent is Dow Chemical's SYL-OFF™ 397, and the catalyst is Wacker ELASTOSIL® PT 62 with a platinum content of 4000 ppm. The UV diluent is Lyon UV-400. The diluent is toluene.

[0128] Example 5 The thickness of the first functional layer is 3 μm. The coating slurry contains the following raw materials in parts by weight: fluoropolymer resin: 55 parts, polyester resin: 15 parts, crosslinking agent: 7.5 parts, dispersant: 0.8 parts, leveling agent: 0.5 parts, and diluent: 21.2 parts. The fluoropolymer resin is trifluorochloroethylene (Taiwan Chang Hsing), the polyester resin is Lancolu, the crosslinking agent is HDI type isocyanate (Covestro), the dispersant is BYK-111, the leveling agent is fluorinated acrylate (Dongguan Aishike Polymer Materials Co., Ltd.), and the diluent is propylene glycol methyl ether acetate (Jiangsu Tianyin).

[0129] The first substrate layer is made of 125μm thick UV-resistant transparent PET (Dongcai), and requires double-sided corona treatment. The side in contact with the second functional layer is coated with a PVA primer (BASF) at a rate of 0.5g / m². 2 .

[0130] The diffusion layer has a thickness of 20 μm. The coating slurry contains the following raw materials in parts by weight: PVA: 10 parts, secondary additive: 1 part, and diluent: 89 parts. The degree of polymerization of PVA (Anhui Viagra) is 3500. The secondary additive is an acetylenic diol wetting agent (Evonik). The diluent is deionized water.

[0131] The printing layer has a thickness of 10 μm. The coating slurry contains the following raw materials in parts by weight: PVA: 10 parts, PVB: 5 parts, crosslinking agent: 4 parts, third auxiliary agent: 2 parts, filler: 40 parts, and diluent: 39 parts. The PVA (Sinopec) used is PVA with a polymerization degree of 400. The PVB is from Anhui Wanwei High-Tech Materials. The crosslinking agent (Covestro) is an HDI type isocyanate. The third auxiliary agent includes a dispersant and a nonionic surfactant. The dispersant is a carboxylate oligomer type (BASF). The nonionic surfactant is a fatty alcohol polyoxyethylene ether (Dow Chemical). The filler is fumed silica (Evonik). The diluent is isopropanol (Shandong Xuchen Chemical Technology Co., Ltd.).

[0132] The release film for the second component is a single-sided fluorine release film based on PET substrate (Kunshan Sibeike Precision Composite Materials Co., Ltd.). It has a thickness of 50 μm and a release force of 5-8 gf / inch.

[0133] The adhesive layer of the second component has a thickness of 30 μm. The slurry contains the following raw materials in parts by weight: 45 parts silicone rubber, 35 parts tackifying resin, 0.2 parts anchoring agent, 0.4 parts crosslinking agent, 0.4 parts catalyst, 3.5 parts UV absorber, and 15.5 parts diluent. The silicone rubber is XIAMETER™ (Dow Chemical), the tackifying resin is Shin-Etsu KE-914, the anchoring agent is Wacker M 4640, the crosslinking agent is Dow Chemical SYL-OFF™ 397, and the catalyst is Wacker ELASTOSIL® PT 62 with a platinum content of 4000 ppm. The UV diluent is Lyon UV-400. The diluent is toluene.

[0134] The second substrate layer of the second component is made of 25μm thick UV-resistant transparent PET (Dongcai).

[0135] Example 6 The thickness of the first functional layer is 20 μm. The coating slurry contains the following raw materials in parts by weight: fluoropolymer resin: 55 parts, polyester resin: 15 parts, crosslinking agent: 7.5 parts, dispersant: 0.8 parts, leveling agent: 0.5 parts, and diluent: 21.2 parts. The fluoropolymer resin is trifluorochloroethylene (Taiwan Chang Hsing), the polyester resin is Lancolu, the crosslinking agent is HDI type isocyanate (Covestro), the dispersant is BYK-111, the leveling agent is fluorinated acrylate (Dongguan Aishike Polymer Materials Co., Ltd.), and the diluent is propylene glycol methyl ether acetate (Jiangsu Tianyin).

[0136] The first substrate layer is made of 125μm thick UV-resistant transparent PET (Dongcai), and requires double-sided corona treatment. The side in contact with the second functional layer is coated with a PVA primer (BASF) at a rate of 0.5g / m². 2 .

[0137] The diffusion layer has a thickness of 50 μm. The coating slurry contains the following raw materials in parts by weight: PVA: 10 parts, secondary additive: 1 part, and diluent: 89 parts. The degree of polymerization of PVA (Anhui Viagra) is 3500. The secondary additive is an acetylenic diol wetting agent (Evonik). The diluent is deionized water.

[0138] The printing layer has a thickness of 25 μm. The coating slurry contains the following raw materials in parts by weight: PVA: 10 parts, PVB: 5 parts, crosslinking agent: 4 parts, third auxiliary agent: 2 parts, filler: 40 parts, and diluent: 39 parts. The PVA (Sinopec) used is PVA with a polymerization degree of 400. The PVB is from Anhui Wanwei High-Tech Materials. The crosslinking agent (Covestro) is an HDI type isocyanate. The third auxiliary agent includes a dispersant and a nonionic surfactant. The dispersant is a carboxylate oligomer type (BASF). The nonionic surfactant is a fatty alcohol polyoxyethylene ether (Dow Chemical). The filler is fumed silica (Evonik). The diluent is isopropanol (Shandong Xuchen Chemical Technology Co., Ltd.).

[0139] The release film for the second component is a single-sided fluorine release film based on PET substrate (Kunshan Sibeike Precision Composite Materials Co., Ltd.). It has a thickness of 50 μm and a release force of 5-8 gf / inch.

[0140] The adhesive layer of the second component has a thickness of 40 μm. The slurry contains the following raw materials in parts by weight: 45 parts silicone rubber, 35 parts tackifying resin, 0.2 parts anchoring agent, 0.4 parts crosslinking agent, 0.4 parts catalyst, 3.5 parts UV absorber, and 15.5 parts diluent. The silicone rubber is XIAMETER™ (Dow Chemical), the tackifying resin is Shin-Etsu Chemical's KE-914, the anchoring agent is Wacker M 4640, the crosslinking agent is Dow Chemical's SYL-OFF™ 397, and the catalyst is Wacker ELASTOSIL® PT 62 with a platinum content of 4000 ppm. The UV diluent is Lyon UV-400. The diluent is toluene.

[0141] The second substrate layer of the second component is made of 25μm thick UV-resistant transparent PET (Dongcai).

[0142] Comparative Example 1 Remove the diffusion layer; other materials and specifications are the same as in Example 1.

[0143] Comparative Example 2 The release film used for the second component is an organosilicon release layer, and the other materials and specifications are the same as in Example 1.

[0144] Comparative Example 3 The second component adhesive layer uses ordinary acrylic pressure-sensitive adhesive instead of silicone pressure-sensitive adhesive, and other materials and specifications are the same as in Example 1.

[0145] Comparative Example 4 The second component adhesive layer has the UV absorber removed, and the other materials and specifications are the same as in Example 1.

[0146] Comparative Example 5 The second substrate layer is made of UV-sensitive PET, and the UV absorber is removed from the second component adhesive layer. Other materials and specifications are the same as in Example 1.

[0147] Comparative Example 6 Traditional matte silver photovoltaic nameplates: Made with PET as the base material, coated with a layer that gives them a matte silver finish. The text or graphics required for the nameplate are then printed onto the coated surface. (Example: Wuxi Guanhao Packaging Materials Technology Co., Ltd.) The test methods for the above embodiments and comparative examples are as follows: 1. Print Quality Evaluation. The surface drying speed and other effects of the pattern or text are determined using a color inkjet printer. The printed layer is touched with a dry paper towel for one second, and the presence or absence of ink bleeding on the paper towel surface is used as a pass / fail criterion.

[0148] 2. Adhesion strength evaluation. The adhesion strength is used to evaluate the degree of bond between the second component and the first component, the glass, and the back panel.

[0149] 3. Long-term weather resistance evaluation. This evaluates the changes in the appearance of the nameplate after long-term UV irradiation.

[0150] 4. High-temperature storage reliability evaluation. The high-temperature storage reliability of the nameplate was evaluated by accelerating the simulation of high-temperature storage conditions in a 50°C oven and testing the interlayer peeling force.

[0151] 5. Other properties, such as transmittance (400-1100nm band) and ultraviolet cutoff (280-380nm band).

[0152] Test and rating results: 1. Print quality evaluation: Note: The first component of Comparative Examples 2-5 is the same as that of Example 1 and is not evaluated.

[0153] 2. Adhesion strength evaluation: Note: (1) All samples were rolled back and forth 4 times by a 2Kg roller. Temperature: 20-25 degrees Celsius. Humidity: 45-60%.

[0154] (2) The test was conducted using a 1Kg sensor tensile testing machine at a speed of 300mm / min.

[0155] (3) The glass test surface is rough, and the back plate test surface is coated with an inner coating.

[0156] 3. Long-term weather resistance evaluation: Note: (1) Equipment parameters are as follows: UVA 1.976KWh / m 2UVB 0.251 kWh / m 2 UVA / UVB = 88.7% / 11.3%.

[0157] (2) Calculate the yellowing ΔYi of the sample superimposed with the first and second components.

[0158] 4. High-temperature storage reliability Fluorine release film (Example) and silicone release film (Comparative Example 2) with nominal release forces of 10-20g were selected and samples were prepared, and rolled into 70mm*10m rolls. Four 20mm*100mm strip samples were taken from each roll. These were placed in a 50°C oven to accelerate the simulation of release film reliability after 30 days of high-temperature storage. The interlayer peel force was tested, and the results are as follows: Note: Examples 2-4 all use fluorinated release films, which are the same as those in Example 1. The test data are similar, so no evaluation is conducted.

[0159] 5. Other performance characteristics 5.1 Light transmittance 5.1.1 The test band is 400-1100nm, and the first and second components are as a whole. 5.2 UV cutoff 5.2.1 The test band is 280-380nm, and the first and second components are integrated. The test results above show that: As can be seen from the above embodiments and comparative examples, the nameplate of this application has significantly improved various properties, including but not limited to: printing effect, adhesion, long-term weather resistance (yellowing), light transmittance and UV cutoff. Regarding high-temperature storage reliability, the uncertainty of interlayer peeling increases significantly when using silicone release film for long-term high-temperature storage, while the fluorine release film used in this solution shows little difference in long-term storage, that is, the problem of release failure is effectively solved.

[0160] This application also has the following beneficial effects: 1. Excellent durability, resistance, and pattern protection: The key printing layer is built into the structure, completely isolating it from the external environment; this fundamentally avoids problems such as scratches, wear, or fading of patterns due to contact with chemical solvents, thus greatly extending the lifespan of the nameplate.

[0161] 2. Overall robust, the multi-layer composite structure is more resistant to bending, impact and deformation than single-layer boards.

[0162] 3. Flat design: The entire nameplate surface can be a complete flat surface (because the pattern is inside), with no raised ink, easy to clean, and a simple and modern appearance.

[0163] 4. Excellent installation reliability and adaptability, strong adhesion. The second component is an independent adhesive module, and its second adhesive layer can select the most suitable adhesive for different installation surfaces (such as metal, plastic, glass, rough surfaces) to ensure that it does not curl or fall off after installation.

[0164] 5. Functional integration and design flexibility: It integrates decorative functions (first component) and installation functions (second component) into one, simplifying the assembly process of the terminal.

[0165] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A nameplate, characterized in that, include: A first component (10) and a second component (20), wherein the second component (20) includes an adhesive layer; When the nameplate is not in use, the first component (10) and the second component (20) are stored separately; when the nameplate is in use, the first component (10) and the second component (20) are bonded together. The nameplate has a light transmittance of 80% to 90% in the 400 to 1100 nm wavelength range.

2. The nameplate according to claim 1, characterized in that, The first component (10) is provided with a first functional layer (101), a first substrate layer (102), and a second functional layer (103) stacked from top to bottom; The second functional layer (103) includes: a diffusion layer (1031) connected to the first substrate layer (102) on the side away from the first functional layer (101), the diffusion layer (1031) being connected to the printing layer (1032); The second component (20) is connected to the lower surface of the first component (10); the second component (20) is provided with a first adhesive layer (201), a second substrate layer (202) and a second adhesive layer (203) stacked from top to bottom; When the first component (10) and the second component (20) are in an unused state, a first release film (30) is provided on the upper surface of the first adhesive layer (201), and a second release film (40) is provided on the lower surface of the second adhesive layer (203).

3. The nameplate according to claim 2, characterized in that, The thickness of the first functional layer (101) is 3-20 μm, and the first functional layer (101) includes: a matrix resin, a first additive and a diluent; The matrix resin is one or more of the following: fluorinated resin, acrylic resin, polyester resin, and epoxy resin. The first additive is one or more of the following: dispersant, leveling agent, ultraviolet absorber, catalyst, and crosslinking agent; The crosslinking agent is one or more combinations of aliphatic and alicyclic isocyanates; The diluent is one or more of xylene, butyl acetate, propyl acetate, ethyl acetate, ethyl triethoxypropionate, propylene carbonate, diisobutyl ketone, cyclohexanone, butanone, and propylene glycol methyl ether acetate. By weight, the first functional layer (101) comprises: 70-90 parts of matrix resin, 6-15 parts of first additive and 10-30 parts of diluent.

4. The nameplate according to claim 2, characterized in that, The first substrate layer (102) is a PET film, PE film, PP film or PI film; The lower surface of the first substrate layer (102) is coated with a PVA primer.

5. The nameplate according to claim 2, characterized in that, The diffusion layer (1031) has a thickness of 20-50 μm and includes: PVA, a second auxiliary agent, and a diluent; The degree of polymerization of PVA is 1500-3500; The second auxiliary agent is one or more of the following: acetylenic diol wetting agents and polyether-modified siloxane polymers; The diluent is deionized water; The diffusion layer (1031) comprises, by weight, 10-30 parts of PVA, 1-10 parts of the second auxiliary agent, and 50-90 parts of diluent.

6. The nameplate according to claim 2, characterized in that, The thickness of the printed layer (1032) is 10-25 μm, and the printed layer (1032) includes: binder, filler, third auxiliary agent and diluent; The adhesive is a composition of low-polymerization-degree polyvinyl alcohol and polyvinyl butyral. The filler is one or both of fumed silica and alumina; The third auxiliary agent includes dispersants, defoamers, wetting agents, crosslinking agents, and antistatic agents; The crosslinking agent is an isocyanate compound; By weight, the printed layer (1032) comprises: 5-25 parts PVA, 1-10 parts PVB, 2-15 parts third auxiliary agent, 20-40 parts filler and 15-40 parts diluent.

7. The nameplate according to claim 2, characterized in that, The first adhesive layer (201) and the second adhesive layer (203) comprise: silicone rubber, tackifying resin, a fourth additive, and a diluent; The dry adhesive content of the first adhesive layer (201) and the second adhesive layer (203) is 10-40 g / m. 2 ; The fourth auxiliary agent includes one or more of the following: anchoring agent, crosslinking agent, catalyst, and ultraviolet absorber; By weight, the first adhesive layer (201) and the second adhesive layer (203) each independently comprise: 40-60 parts of silicone rubber, 30-50 parts of tackifying resin, 1-10 parts of fourth additive and 10-30 parts of diluent.

8. A method for preparing a nameplate, characterized in that, include: Mix the materials of the first functional layer (101) according to the formula at room temperature, add diluent to adjust the viscosity, and stir in a closed container for 30-60 minutes. Pass the well-stirred paint through a filter and circulate it for 10-30 minutes. The formulation coating of the first functional layer (101) is transferred to the first substrate layer and then dried. On the other side, a PVA primer is applied using a micro-grooved roller, followed by drying. Mix the diffusion layer (1031) slurry according to the ratio at room temperature, add diluent to adjust the viscosity, and stir in a closed manner for 30-60 minutes; pass the uniformly stirred coating through a filter and circulate it for 10-30 minutes. The slurry is transferred to the primer surface using a microgravure coating device, followed by drying. At room temperature, mix the printing layer (1032) paste according to the ratio, add diluent to adjust the viscosity, and pass the well-stirred coating through a filter for 10-30 minutes. The prepared slurry was transferred to the surface of the diffusion layer (1031) using a micro-gravure coating process; followed by drying. After aging for 2 days, the first component (10) was obtained; The second substrate layer is subjected to online corona treatment on both sides, coated with silicone pressure-sensitive adhesive by micro-grooving roller, and then laminated with fluorine release film. After drying, the second component (20) is obtained. The first component (10) and the second component (20) are cut to the specified size.

9. A photovoltaic module, characterized in that, Includes the nameplate (1) as described in any one of claims 1-7; the photovoltaic module is a double-sided double-glass module or a double-sided single-glass module.

10. The application of a nameplate according to any one of claims 1-7 or the nameplate preparation method according to claim 8 in a solar photovoltaic module composed of PERC cells, TOPCon cells, HJT cells, IBC cells or HBC / TBC cells.

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