Adhesive tape and double-glass structure product

Abstract

The invention provides an adhesive tape and a double-glass structure product. The adhesive tape comprises a release film layer, a pressure-sensitive adhesive layer and a base material layer which are sequentially stacked, the pressure-sensitive adhesive layer comprises a flaky magnetic filler; the flaky magnetic filler comprises a first-direction flaky magnetic filler and a second-direction flaky magnetic filler, an acute angle between the normal direction of the first-direction flaky magnetic filler and the winding axis direction of the adhesive tape is 0-45 degrees, and the first-direction flaky magnetic filler accounts for 50-100% of the weight of the flaky magnetic filler. By adding the flaky magnetic filler into the pressure-sensitive adhesive layer and adjusting the orientation of the flaky magnetic filler in the pressure-sensitive adhesive layer, the transverse and longitudinal water resistance of the adhesive tape is remarkably improved, the weather resistance and bonding strength of the adhesive tape are considered, and when the adhesive tape is applied to objects with water resistance requirements on edges or adhesive tape bonding parts, such as photovoltaic modules, laminated glass and the like, the adhesive tape has excellent water resistance. Effective protection can be provided, and the service life of assemblies is effectively prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of adhesive tapes, in particular to an adhesive tape and a double-glass structure product. BACKGROUND

[0002] The photovoltaic module and the functional laminated glass and other double-glass structure products, if no effective water barrier is set around, the internal electronic components and encapsulation materials are easily eroded by the penetration of ambient water vapor in the long-term use. This continuous water vapor intrusion will lead to the attenuation of electrical performance and the acceleration of material aging of the product, and may even cause functional failure, which poses significant quality and safety risks.

[0003] In the prior art, silicone is applied around the double-glass structure product to inhibit water vapor intrusion, but the silicone curing depends on humidity in use, and the glue inside the laminate is unstable, resulting in poor sealing of the encapsulation.

[0004] In the prior art, there are also special edge sealing tapes set around the double-glass structure product, which have a certain water blocking effect, but the water blocking effect is not obvious or easy to cause other problems. For example, Chinese Patent No. CN109294475A has good softness, good adhesion, high weather resistance, and does not become brittle, fall off or yellow when used outdoors for a long time, and no adhesive residue is left when peeled off, but its weather resistance and water blocking performance need to be further improved. For example, Chinese Patent No. CN117801712A, but it is prone to aging under high temperature and high humidity conditions, resulting in a serious decline in the adhesion performance of the tape, and even delamination, which cannot meet the performance requirements of the tape in extreme environments in the photovoltaic industry.

[0005] In summary, when the adhesive tape is used for bonding the frame of the double-glass structure product such as the photovoltaic module, it not only needs to withstand severe environmental tests, but also needs to maintain long-term adhesion strength and water vapor blocking performance. However, the current photovoltaic adhesive tape product cannot meet these requirements at the same time. Therefore, it is a technical problem to be solved to develop an adhesive tape that can maintain excellent water blocking performance and adhesion strength under various aging conditions. SUMMARY

[0006] The main purpose of the present application is to provide an adhesive tape and a double-glass structure product to solve the problem of poor water vapor blocking performance and aging resistance of the adhesive tape in the prior art.

[0007] To achieve the above objectives, according to one aspect of the present invention, an adhesive tape is provided. The tape includes a release film layer, a pressure-sensitive adhesive layer, and a substrate layer stacked sequentially; the pressure-sensitive adhesive layer includes sheet-like magnetic filler; the sheet-like magnetic filler includes sheet-like magnetic filler in a first direction and sheet-like magnetic filler in a second direction, wherein the acute angle between the normal direction of the first-direction sheet-like magnetic filler and the winding axis direction of the tape is 0–45°, and the first-direction sheet-like magnetic filler accounts for 50–100% of the total weight of the sheet-like magnetic filler.

[0008] Furthermore, the types of magnetic fillers in the sheet-like magnetic fillers include soft magnetic materials and / or hard magnetic materials. Soft magnetic materials include one or more of ferrite soft magnets, metallic soft magnets, amorphous soft magnets, and nanocrystalline soft magnets; hard magnetic materials include one or more of metallic permanent magnets, ferrite permanent magnets, and rare earth permanent magnets; preferably, the sheet-like magnetic filler is a sheet-like soft magnetic material.

[0009] Furthermore, the aspect ratio of the sheet-like magnetic filler is 10 to 50; preferably, the aspect ratio of the sheet-like magnetic filler is 30 to 50.

[0010] Furthermore, the remanence of the sheet-like magnetic filler is ≤0.1T; preferably, the remanence of the sheet-like magnetic filler is ≤0.05T.

[0011] Furthermore, in the pressure-sensitive adhesive layer, the weight percentage of sheet-like magnetic filler is 2-15%.

[0012] Further, the pressure-sensitive adhesive layer comprises: rubber, tackifier, plasticizer, vulcanizing agent, vulcanization accelerator, activator, sheet-like magnetic filler, non-magnetic filler, and antioxidant; preferably, the pressure-sensitive adhesive layer comprises: 100 parts rubber, 40-80 parts tackifier, 0-40 parts plasticizer, 3-15 parts vulcanizing agent, 0-5 parts vulcanization accelerator, 0-5 parts activator, 5-20 parts sheet-like magnetic filler, 0-20 parts non-magnetic filler, and 0.5-2 parts antioxidant; preferably, the rubber includes one or more of polybutadiene rubber, brominated butyl rubber, chlorinated butyl rubber, chlorinated rubber, chloroprene rubber, chlorosulfonated polyethylene, ethylene propylene diene monomer (EPDM) rubber, ethylene propylene diene monomer (EPDM) rubber, ethylene vinyl acetate rubber, butyl rubber, isoprene rubber, nitrile rubber, natural rubber, styrene-butadiene rubber, styrene-butadiene-styrene block copolymer, hydrogenated styrene-butadiene block copolymer, hydrogenated styrene-isoprene block copolymer, and styrene-isoprene-styrene block copolymer; preferably, the tackifier includes one or more of terpene resin, petroleum resin, rosin resin, polyisobutylene, silane coupling agent, and titanate coupling agent; preferably, the plasticizer includes natural plasticizer. Plasticizers and / or synthetic plasticizers; more preferably, natural plasticizers include one or more of mineral oils, vegetable oils, and liquid rubber; even more preferably, mineral oils include one or more of paraffin oils, naphthenic oils, aromatic oils, and chlorinated paraffins; even more preferably, vegetable oils include one or more of lanolin, pine oil, lecithin, and castor oil; even more preferably, liquid rubber includes one or more of liquid polyisobutylene, liquid polybutadiene, liquid polybutene, liquid polyisoprene, and thermally degradable low molecular weight rubber with a number average molecular weight of less than 10,000; more preferably, synthetic plasticizers include dibutyl phthalate and / or tricresyl phosphate; preferably, vulcanizing agents include sulfur, dicumyl peroxide, and peroxide... The accelerator comprises one or more of the following: benzoyl disulfide, 1,1-di-tert-butylperoxy-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, 1,3-bis(tert-butylperoxyisopropyl)benzene, tetramethylthiuram disulfide, 4,4'-dithiobismorpholine, quinone compounds, phenolic resins, metal oxides, and isocyanates; more preferably, the metal oxide includes one or more of lead oxide, zinc oxide, and magnesium oxide; preferably, the vulcanization accelerator includes dithiocarbamate rubber vulcanization accelerators, thiuram rubber vulcanization accelerators, thiourea rubber vulcanization accelerators, thiazole rubber vulcanization accelerators, sulfenamide rubber vulcanization accelerators, and guanidine rubber vulcanization accelerators. The rubber comprises one or more of organic amine rubber vulcanization accelerators and xanthate rubber vulcanization accelerators; preferably, the activator includes stearic acid and / or stearate; preferably, the non-magnetic filler includes one or more of calcium carbonate, mica powder, talc powder, kaolin, glass powder, bentonite, molecular sieve, carbon black, titanium dioxide, barium sulfate, fumed silica, precipitated silica, silica micropowder, hollow glass microspheres, calcium oxide, and alumina; preferably, the antioxidant includes one or more of antioxidant A, antioxidant D, p-phenylenediamine derivative, antioxidant 264, antioxidant 2246, antioxidant 1076, dilauryl thiodipropionate, nickel dibutyldithiocarbamate, antioxidant MB, and antioxidant MBZ.

[0013] Furthermore, the preparation method of the pressure-sensitive adhesive layer includes: mixing the components of the pressure-sensitive adhesive layer with a solvent to obtain a mixture, treating the mixture under a magnetic field to orient the sheet-like magnetic filler, and drying the mixture to obtain the pressure-sensitive adhesive layer.

[0014] Furthermore, the magnetic field strength is 100–800 mT; and / or, the drying temperature is 100–160 °C, and the drying time is 2–6 min; and / or, the solvent includes one or more of toluene, xylene, n-hexane, cyclohexane, heptane, solvent gasoline, chloroform, turpentine, acetone, ethyl acetate, and butyl acetate, and the weight ratio of the solvent to the components of the pressure-sensitive adhesive layer is (2–10):1.

[0015] Further, the substrate layer includes a metal foil or a coating. Preferably, the metal foil includes one or more of aluminum foil, copper foil, and stainless steel foil. Preferably, the coating includes one or more of silicon oxide, aluminum oxide, and aluminum plating. Preferably, the substrate layer also includes a plastic film, which includes one or more of PET, PEN, PI, PP, PC, and PA. More preferably, the substrate layer includes 1 to 2 layers of plastic film. And / or, the thickness of the substrate layer is 20 to 40 μm. And / or, the thickness of the pressure-sensitive adhesive layer is 10 to 60 μm. And / or, the thickness of the release film layer is 25 to 125 μm.

[0016] According to another aspect of the present invention, a double-glass structure product is provided, wherein edge sealing tape is provided around the perimeter, and the edge sealing tape includes the aforementioned tape.

[0017] By applying the technical solution of this invention, by adding sheet-like magnetic fillers to the pressure-sensitive adhesive layer and adjusting the orientation of the sheet-like magnetic fillers in the pressure-sensitive adhesive layer, the water-blocking performance of the tape in both the transverse and longitudinal directions is significantly improved, while taking into account the weather resistance and adhesive strength of the tape. When applied to objects that require water-blocking performance at the edges or where the tape is pasted, such as photovoltaic modules and laminated glass, it can provide effective protection and effectively extend the life of the modules. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 A schematic diagram of the tape and pressure-sensitive adhesive layer structure of Embodiment 1 of the present invention is shown;

[0020] Figure 2 A schematic diagram illustrating the application scenario of the tape according to Embodiment 1 of the present invention is shown; and

[0021] Figure 3The diagram shows the position of the tape when testing the water vapor transmission rate of the tape in an embodiment or comparative example of the present invention.

[0022] The above figures include the following reference numerals:

[0023] 1. Sheet-shaped magnetic filler; 11. Sheet-shaped magnetic filler in the first direction; 12. Sheet-shaped magnetic filler in the second direction; 2. Substrate layer; 3. Functional material; 4. Battery cell; 5. Adhesive tape; 6. Frame silicone; 7. Release film layer; A. Direction of the tape winding axis; B. Normal direction of the sheet-shaped magnetic filler in the first direction; θ1. Acute angle between the normal direction of the sheet-shaped magnetic filler in the first direction and the winding axis direction of the tape; C. Normal direction of the sheet-shaped magnetic filler in the second direction; θ2. Acute angle between the normal direction of the sheet-shaped magnetic filler in the second direction and the winding axis direction of the tape. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] It should be noted that the terms "first," "second," etc., in the specification and claims of this invention 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 describing embodiments of the invention.

[0026] As described in the background section of this invention, existing adhesive tapes suffer from poor moisture barrier properties and anti-aging properties. To address these issues, in a typical embodiment of this invention, an adhesive tape is provided. The tape comprises a release film layer, a pressure-sensitive adhesive layer, and a substrate layer stacked sequentially. The pressure-sensitive adhesive layer includes sheet-like magnetic fillers. The sheet-like magnetic fillers include sheet-like magnetic fillers in a first direction and sheet-like magnetic fillers in a second direction. The acute angle between the normal direction of the first-direction sheet-like magnetic filler and the winding axis of the tape is 0–45°, and the first-direction sheet-like magnetic filler accounts for 50–100% of the total weight of the sheet-like magnetic filler.

[0027] The tape of this application comprises a release film layer, a pressure-sensitive adhesive layer, and a substrate layer stacked sequentially. The release film layer, as the outermost layer, protects the pressure-sensitive adhesive layer before storage and use, preventing it from prematurely adhering to other objects and affecting the tape's performance. The pressure-sensitive adhesive layer, located between the substrate layer and the release film layer, not only provides strong adhesion but also enhances the barrier against moisture penetration, ensuring the tape's stable performance in extreme environments. The substrate layer, as the bottom layer of the tape, effectively prevents moisture from directly penetrating into the component's interior.

[0028] It is important to emphasize that the pressure-sensitive adhesive layer of this application includes sheet-like magnetic fillers. The inventors unexpectedly discovered that the diameter of the sheet-like magnetic filler is much larger than its thickness; adding it to the pressure-sensitive adhesive layer can form a layered structure within the layer. During tape formation, the sheet-like fillers naturally align under the influence of surface tension and gravity. This layered arrangement significantly increases the path length for small molecules such as water vapor to penetrate the adhesive layer, creating a "maze effect," thereby effectively blocking water vapor penetration along the tape's thickness. The magnetic properties of the sheet-like magnetic fillers allow for directional alignment guided by an external magnetic field, forming an effective barrier path and significantly improving the tape's water vapor barrier performance. Its ease of magnetization and demagnetization not only reduces production energy consumption and simplifies operating procedures but also ensures that the product does not interfere with the electrical performance of photovoltaic modules during application, maintaining stable module power.

[0029] Furthermore, this application specifically controls that the sheet-like magnetic filler in the pressure-sensitive adhesive layer includes a first-direction sheet-like magnetic filler and a second-direction sheet-like magnetic filler. The acute angle between the normal direction of the first-direction sheet-like magnetic filler and the winding axis of the tape is 0–45°, and the first-direction sheet-like magnetic filler accounts for 50–100% of the weight of the sheet-like magnetic filler. The normal direction of the sheet-like magnetic filler refers to the direction perpendicular to the surface of the sheet-like magnetic filler, and the winding axis of the tape refers to the direction of the central axis formed by the length of the tape when it is rolled into a roll. It should be noted that the second-direction sheet-like magnetic filler in this application mainly refers to sheet-like magnetic fillers with a direction different from that of the first-direction sheet-like magnetic filler, and does not specifically refer to sheet-like magnetic fillers with a particular direction or angle, which is understandable to those skilled in the art. Under the above conditions, the first-direction sheet-like magnetic filler can also form a layered structure in the longitudinal direction (parallel to the surface of the tape), thereby significantly enhancing the tape's barrier effect against water vapor penetration in the direction parallel to the tape surface, compensating for the shortcomings of traditional tapes in lateral barrier capabilities. The barrier path formed by the aforementioned specific proportion of first-direction sheet-like magnetic filler is continuous and dense, effectively extending the path length for water vapor penetration, thus providing strong protection against environmental erosion such as water vapor. However, if the content of the first-direction sheet-like magnetic filler is too low, the water vapor barrier performance of the tape will decrease.

[0030] Furthermore, the optional second-directional sheet-like magnetic filler can complement the first-directional sheet-like magnetic filler spatially and synergistically in performance. In the pressure-sensitive adhesive layer, based on the protective barrier constructed by the first-directional sheet-like magnetic filler, the second-directional sheet-like magnetic filler can be distributed in different orientations to fill the gaps of the first-directional sheet-like filler at other angles, thereby improving the all-around protective effect.

[0031] In summary, this application constructs a comprehensive water vapor barrier system by adding sheet-like magnetic fillers to the pressure-sensitive adhesive layer and controlling the angle and content of the sheet-like magnetic fillers in the first direction of the pressure-sensitive adhesive layer. The sheet-like magnetic fillers form a "maze" structure, significantly improving the water-blocking performance of the tape in both the lateral and longitudinal directions, while also considering the tape's weather resistance and adhesive strength. When applied to objects requiring water-blocking performance at the edges or where the tape is applied, such as photovoltaic modules and laminated glass, it can provide effective protection and effectively extend the module's lifespan.

[0032] In a preferred embodiment, the magnetic filler in the sheet-like magnetic filler includes soft magnetic materials and / or hard magnetic materials. The soft magnetic materials include one or more of ferrite soft magnets, metallic soft magnets, amorphous soft magnets, and nanocrystalline soft magnets; the hard magnetic materials include one or more of metallic permanent magnets, ferrite permanent magnets, and rare earth permanent magnets; wherein, the ferrite soft magnets include manganese-zinc ferrites and / or nickel-zinc ferrites; the metallic soft magnets include one or more of electrical pure iron, silicon steel, permalloy, and other soft magnetic alloys; the other soft magnetic alloys include one or more of iron-aluminum alloys, iron-silicon-aluminum alloys, and iron-cobalt alloys; and the amorphous soft magnets... The fillers include one or more of iron-based amorphous materials, cobalt-based amorphous materials, and iron-nickel-based amorphous materials; nanocrystalline soft magnets include iron-based nanocrystalline materials and / or iron-cobalt-based nanocrystalline materials; metallic permanent magnets include one or more of quench-hardening magnets, precipitation-hardening magnets, age-hardening permanent magnet alloys, and ordered-hardening permanent magnet alloys; ferrite permanent magnets include barium ferrites and / or strontium ferrites; rare earth permanent magnets include one or more of samarium cobalt permanent magnets, neodymium iron boron permanent magnets, and rare earth iron nitrogen permanent magnets; samarium cobalt permanent magnets include SmCo5 and / or SmCo17; neodymium iron boron permanent magnets include one or more of sintered neodymium iron boron, bonded neodymium iron boron, and injection-molded neodymium iron boron. These types of fillers can enhance the moisture barrier properties of tapes more effectively through magnetic field orientation, and can also optimize their mechanical, thermal, and electromagnetic properties.

[0033] In a preferred embodiment, the sheet-like magnetic filler is a sheet-like soft magnetic material. This filler has low coercivity and weak remanence, making it easier to magnetize and demagnetize. When used in tape, even mild magnetic field treatment can ensure precise orientation of the sheet-like filler, creating a "maze effect" that provides better protection against moisture penetration. Furthermore, the low remanence avoids inter-sheet adsorption when the tape is rolled up, making separation before use easier. Additionally, the tape does not leave a residual magnetic field after application to the module, thus improving the reliability and safety of both the tape and the module.

[0034] The inventors have optimized the types of sheet-like magnetic fillers. In a preferred embodiment, the sheet-like soft magnetic material includes one or more of the following: nickel powder, mica powder coated with iron(III) oxide, carbonyl iron powder, and iron-silicon-aluminum alloy powder. Specifically, the sheet-like magnetic filler includes one or more of the following: sheet-like nickel powder, mica powder coated with iron(III) oxide, sheet-like carbonyl iron powder, and sheet-like iron-silicon-aluminum alloy powder. These fillers not only further enhance barrier properties, but also possess excellent weather resistance and chemical stability. After high-temperature, high-humidity PCT testing or boiling water testing, they maintain structural integrity without aging or delamination, thus more effectively enabling the tape to maintain stable adhesive strength and moisture barrier capabilities even under extreme aging conditions.

[0035] To enable the sheet-like magnetic fillers to be more tightly stacked, forming a complex "maze effect" water-blocking network that facilitates the passage of water vapor, in a preferred embodiment, the aspect ratio of the sheet-like magnetic fillers is 10–50; more preferably, the aspect ratio is 30–50. For similar reasons, in a preferred embodiment, the aspect ratio of the sheet-like nickel powder is 30–50; and / or, the aspect ratio of the mica powder coated with iron(III) oxide is 40–50; and / or, the aspect ratio of the sheet-like carbonyl iron powder is 40–50; and / or, the aspect ratio of the sheet-like iron-silicon-aluminum alloy powder is 30–50.

[0036] To further reduce adsorption between filler flakes during tape curling, maintain filler orientation, and thus better stabilize the water-blocking network and ensure long-term high-efficiency water blocking, in a preferred embodiment, the remanence of the sheet-like magnetic filler is ≤0.1T; preferably, the remanence of the sheet-like magnetic filler is ≤0.05T. For similar reasons, in a preferred embodiment, the remanence of the sheet-like nickel powder is 0.01–0.02T; and / or, the remanence of the mica powder coated with iron(III) oxide is 0.02–0.04T; and / or, the remanence of the sheet-like carbonyl iron powder is 0.02–0.04T; and / or, the remanence of the sheet-like iron-silicon-aluminum alloy powder is 0.01–0.03T.

[0037] To ensure both moisture barrier performance and adhesive properties while maintaining practicality and economy, in a preferred embodiment, the weight percentage of sheet-like magnetic filler in the pressure-sensitive adhesive layer is 2-15%. At this proportion, the sheet-like magnetic filler can be more precisely arranged under the guidance of a magnetic field, creating a complex labyrinth effect. This further increases the difficulty of lateral moisture penetration, reducing the moisture permeability of the tape. Even under extreme high-temperature and high-humidity aging environments, the tape maintains stable adhesion and excellent barrier performance. However, if the content is too low, the moisture barrier effect is limited; if the content is too high, the economy is poor, and it may affect the tape's flexibility and adhesive properties.

[0038] For a specific type of sheet-like magnetic filler, the inventors have precisely controlled the composition of the pressure-sensitive adhesive layer. In a preferred embodiment, the composition of the pressure-sensitive adhesive layer includes: rubber, tackifier, plasticizer, vulcanizing agent, vulcanization accelerator, activator, sheet-like magnetic filler, non-magnetic filler, and antioxidant. Preferably, by weight, the composition of the pressure-sensitive adhesive layer includes: 100 parts rubber, 40-80 parts tackifier, 0-40 parts plasticizer, 3-15 parts vulcanizing agent, 0-5 parts vulcanization accelerator, 0-5 parts activator, 5-20 parts sheet-like magnetic filler, 0-20 parts non-magnetic filler, and 0.5-2 parts antioxidant.

[0039] Rubber, as the matrix, endows the tape with excellent adhesion and flexibility. Tackifiers and plasticizers adjust the bonding strength and plasticity of the adhesive layer, ensuring good applicability of the tape to different materials. The addition of vulcanizing agents, vulcanization accelerators, and activators not only promotes the vulcanization process of the tape under mild conditions, improving heat resistance and weather resistance, but also further enhances the stability and durability of the tape structure. The combined use of sheet-like magnetic fillers and non-magnetic fillers enables the fillers to oriented under the action of a magnetic field, constructing a highly efficient barrier structure. Moreover, controlling the content of sheet-like magnetic fillers in the composition within the aforementioned range can further increase the difficulty of lateral water vapor penetration, reduce the water vapor permeability of the tape, and ensure the barrier performance of the tape in extreme environments. At the same time, 0.5 to 2 parts of antioxidant can more effectively inhibit the aging phenomenon of the tape during long-term use, maintaining the stability of its barrier and bonding properties. The above components work synergistically to not only significantly improve the water vapor barrier capacity of the tape, but also give it superior bonding stability and aging resistance under complex environmental conditions.

[0040] For similar reasons, in a preferred embodiment, the weight ratio of sheet magnetic filler to plasticizer in the pressure-sensitive adhesive layer is (3:10) to (5:10).

[0041] In the pressure-sensitive adhesive layer, the rubber, tackifier, plasticizer, vulcanizing agent, vulcanization accelerator, activator, non-magnetic filler, and antioxidant can be of conventional types in the art. For the purpose of greater compatibility among the components, preferably, the rubber includes BR polybutadiene rubber, Br-IIR brominated butyl rubber, CIIR chlorinated butyl rubber, CNR chlorinated rubber, CR chloroprene rubber, CSM chlorosulfonated polyethylene, EPM ethylene propylene diene monomer (EPM) rubber, EPDM ethylene propylene diene monomer (EPDM) rubber, EVM ethylene vinyl acetate rubber, IIR butyl rubber, IR isoprene rubber, NBR nitrile butadiene rubber, NR natural rubber, SBR styrene-butadiene rubber, SBS styrene-butadiene-styrene block copolymer, SEBS hydrogenated styrene-butadiene block copolymer, and SEPS hydrogenated... One or more of styrene-isoprene block copolymers and SIS styrene-isoprene-styrene block copolymers, more preferably one or more of NR natural rubber (model: No. 5 standard rubber), IIR butyl rubber (model: IIR1751), EPDM ethylene propylene diene monomer rubber (model: IP3720P) and SBS styrene-butadiene-styrene block copolymer (model: SBS1401); the above-mentioned rubbers have stronger weather resistance, temperature resistance and barrier properties, which can further improve the stability and service life of the tape in harsh environments such as high temperature and humid heat.

[0042] Preferably, the tackifier includes one or more of terpene resins, petroleum resins, rosin resins, polyisobutylene, silane coupling agents, and titanate coupling agents; more preferably, it is one or more of terpene resin TSR-1008, C5 resin HHC-1095, hydrogenated C5 resin H5-1250W, and C9 resin PR-110-10; preferably, the plasticizer includes natural plasticizers and / or synthetic plasticizers; more preferably, the natural plasticizer includes one or more of mineral oils, vegetable oils, and liquid rubber; even more preferably, the mineral oil includes one or more of paraffin oils, naphthenic oils, aromatic oils, and chlorinated paraffins; even more preferably, the vegetable oil includes lanolin, etc. One or more of pine resin oil, lecithin, and castor oil; more preferably, the liquid rubber includes one or more of liquid polyisobutylene, liquid polybutadiene, liquid polybutene, liquid polyisoprene, and thermally degradable low molecular weight rubber; more preferably, the synthetic plasticizer includes dibutyl phthalate and / or tricresyl phosphate; more preferably, the plasticizer is one or more of polyisobutylene (model: PB950), paraffin oil, and naphthenic oil KN4010; the above-mentioned tackifiers and plasticizers can further optimize the adhesion and flexibility of the tape, ensuring that the tape still has good adhesion and durability under high temperature and humid conditions, while not affecting its barrier properties.

[0043] Preferably, the vulcanizing agent includes one or more of sulfur, dicumyl peroxide, benzoyl peroxide, 1,1-di-tert-butylperoxy-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, 1,3-bis(tert-butylperoxyisopropyl)benzene, tetramethylthiuram disulfide, 4,4'-dithiobismorpholine, quinone compounds, phenolic resins, metal oxides, and isocyanates, more preferably TMTD (tetramethylthiuram disulfide) or DTDM (4,4'-dithiobismorpholine). Dimorpholine, DGM dibenzoyl-p-quinone dioxime, lead oxide, bis(2,5-dimethyl-2,5-di(tert-butylperoxy)hexane), and sulfur; the above-mentioned vulcanizing agents can more effectively promote the formation of colloidal networks and enhance the crosslinking density of materials, thereby further improving the heat resistance and chemical stability of the tape; more preferably, the metal oxide includes one or more of lead oxide, zinc oxide, and magnesium oxide; preferably, the vulcanization accelerator includes dithiocarbamate rubber vulcanization accelerators, thiuram rubber vulcanization accelerators The accelerator is selected from one or more of the following: thiourea-based rubber vulcanization accelerators, thiazole-based rubber vulcanization accelerators, sulfenamide-based rubber vulcanization accelerators, guanidine-based rubber vulcanization accelerators, organic amine-based rubber vulcanization accelerators, and xanthate-based rubber vulcanization accelerators, more preferably 2-thiol-benzothiazole, N-cyclohexyl-2-benzothiazole sulfenamide, N-oxadiethylene-2-benzothiazole sulfenamide, bis(pentamethylene)thiuram hexasulfide, zinc dibutyldithiocarbamate, and diethylthiourea; the above-mentioned types of vulcanization accelerators are more effective. The activator promotes the vulcanization reaction, increases the degree of vulcanization, reduces the vulcanization temperature, and shortens the vulcanization time, while ensuring the uniformity and integrity of the vulcanization network, thereby further improving the aging resistance of the tape. Preferably, the activator includes stearic acid and / or stearate, more preferably zinc stearate, magnesium stearate, or rare earth fatty acid salts. The above-mentioned activators can further accelerate the action of the vulcanization accelerator, optimize the vulcanization reaction process, thereby enhancing the high temperature and damp heat resistance of the tape, and ensuring that it maintains excellent barrier and adhesion effects under extreme aging conditions.

[0044] Preferably, the non-magnetic filler includes one or more of calcium carbonate, mica powder, talc powder, kaolin, glass powder, bentonite, molecular sieve, carbon black, titanium dioxide, barium sulfate, fumed silica, precipitated silica, silica micropowder, hollow glass microspheres, calcium oxide, and alumina, more preferably 2000-mesh calcium carbonate and / or 800-mesh talc powder; the above-mentioned fillers can further improve the comprehensive performance of the tape matrix and enhance the moisture barrier and adhesion performance of the tape under extreme conditions; preferably, the antioxidant includes antioxidant A, antioxidant D, p-phenylenediamine derivative, antioxidant 264, antioxidant 2246, antioxidant 1076, dilauryl thiodipropionate, nickel dibutyl dithiocarbamate, antioxidant MB, antioxidant MBZ, UV stabilizer, and rubber stabilizer. One or more of the antioxidants are included. For example, the UV-resistant additives include one or more of UV-326, UV-327, UV-328, UV-125, UV-531, and UV-1577; the rubber antioxidants include one or more of antioxidants RD, AW, BLE, 4010NA, 6PPD, 264, and 2246-S; more preferably, the antioxidant is one or more of antioxidants RD / A, 4010NA, AW, and 3100. The antioxidants of the above types can more effectively inhibit the oxidation, photolysis, and pyrolysis reactions of rubber under aging conditions such as high temperature and humid heat, thereby further extending the service life of the tape and maintaining its barrier properties.

[0045] Compared to existing acrylic and silicone systems, the combination of rubber, tackifier, plasticizer, and vulcanization system in the above system, along with the synergistic effect of sheet-like magnetic filler and antioxidant, results in a pressure-sensitive adhesive layer with strong hydrophobicity and a dense structure, better water-blocking performance, higher bonding strength, and better high-temperature and water-boiling resistance.

[0046] In a preferred embodiment, the method for preparing the pressure-sensitive adhesive layer includes: mixing the components of the pressure-sensitive adhesive layer with a solvent to obtain a mixture, treating the mixture under a magnetic field to orient the sheet-like magnetic filler, and drying the mixture to obtain the pressure-sensitive adhesive layer.

[0047] First, the components of the pressure-sensitive adhesive layer are thoroughly mixed with the solvent to form a uniformly distributed mixture. Then, this mixture is placed in a magnetic field environment, causing the sheet-like magnetic filler to respond to the magnetic field and align itself, forming an oriented labyrinth structure within the adhesive. This effectively increases the path length for lateral water vapor penetration, thus significantly improving the tape's water vapor barrier capability. Simultaneously, by drying the solvent and curing the adhesive during the magnetic field alignment process, not only is the alignment of the sheet-like magnetic filler fixed, but the physical properties and chemical stability of the pressure-sensitive adhesive layer are also ensured.

[0048] In summary, the pressure-sensitive adhesive layer prepared by the present invention through magnetic field orientation and drying technology can not only achieve precise orientation of sheet-like magnetic fillers in structure, but also ensure the excellent performance and long-term stability of the tape under complex environmental conditions, providing efficient and reliable edge protection for photovoltaic modules.

[0049] In a preferred embodiment, the magnetic field strength is 100–800 mT. Under this condition, the sheet-like magnetic filler can respond to the magnetic field more fully and sensitively, and align itself to create a more efficient labyrinth effect, significantly increasing the path length for lateral water vapor penetration and enhancing the tape's water vapor barrier properties. Furthermore, the synergy between this magnetic field action and the drying and curing process further helps ensure the alignment of the sheet-like filler is fixed, allowing the tape to maintain high barrier properties while better preserving its adhesion and aging resistance. However, too low a magnetic field strength may affect the alignment of the filler, while an excessively strong magnetic field may cause aggregation between fillers, affecting the uniformity and stability of the adhesive layer.

[0050] In order to more effectively avoid the adverse effects of high temperature on the components of the mixture, and at the same time ensure the rapid curing of the adhesive layer and maintain the orientation effect of the filler, in a preferred embodiment, the drying temperature is 100-160°C and the time is 2-6 minutes.

[0051] In a preferred embodiment, the solvent includes one or more of toluene, xylene, n-hexane, cyclohexane, heptane, solvent gasoline, chloroform, turpentine, acetone, ethyl acetate, and butyl acetate, with a weight ratio of solvent to components of the pressure-sensitive adhesive layer of (2-10):1. The aforementioned solvents possess good solubility and moderate evaporation rates, ensuring that all components are fully dissolved during the mixing stage to form a uniform colloidal mixture, which is more conducive to the orientation distribution of the sheet-like magnetic filler under a magnetic field. Simultaneously, the solvent evaporates more rapidly during the drying process, preventing filler redistribution and maintaining the orientation effect, thereby further enhancing the moisture barrier properties of the tape.

[0052] In a preferred embodiment, the substrate layer comprises a metal foil or a coating. Preferably, the metal foil comprises one or more of aluminum foil, copper foil, and stainless steel foil. Preferably, the coating comprises one or more of silicon oxide, aluminum oxide, and aluminum plating. Preferably, the substrate layer further comprises a plastic film, which comprises one or more of PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PI (polyimide), PP (polypropylene), PC (polycarbonate), and PA (polyamide). More preferably, the substrate layer comprises 1 to 2 layers of plastic film. The substrate layer has lower water vapor permeability, which not only enhances the barrier effect but also further improves the flexibility and processability of the tape. In a preferred embodiment, the release film layer comprises one or more of silicone-based, fluorine-based, and non-silicone-based types. The release film layer ensures that the tape does not stick to itself during operation, making it convenient to use and leaving no residue, thereby further improving the practicality and user experience of the tape.

[0053] To balance the barrier effect of the substrate layer and the release film layer with flexibility, in a preferred embodiment, the thickness of the substrate layer is 20–40 μm. Under these conditions, sufficient barrier effect is ensured while maintaining good overall flexibility of the tape, facilitating edge wrapping operations of photovoltaic modules. This ensures that even in complex and variable applications at the edges of photovoltaic modules, the tape effectively blocks moisture while maintaining good adhesion and durability. An excessively thick substrate layer or release film layer increases the rigidity of the tape, affecting its adhesion and processability, while an excessively thin layer may result in poor barrier effect.

[0054] In a preferred embodiment, the thickness of the pressure-sensitive adhesive layer is 10–60 μm. Within this range, the pressure-sensitive adhesive layer can ensure both adhesive stability and moisture barrier properties, meeting the needs of photovoltaic modules in practical applications while also considering economic efficiency and environmental friendliness. An excessively thin adhesive layer may affect adhesive strength and barrier effect, while an excessively thick adhesive layer may affect the tape's flexibility, processing efficiency, and cost.

[0055] In a preferred embodiment, the thickness of the release film layer is 25–125 μm. Under these conditions, the release performance of the release film layer can be better balanced with the mechanical strength, flexibility, and cost of the adhesive tape.

[0056] As mentioned above, the aforementioned substrate layers have low water vapor transmission rates, which are more effective in preventing vertical water vapor penetration. Furthermore, the pressure-sensitive adhesive layer, through the oriented arrangement of sheet-like magnetic fillers, effectively blocks lateral water vapor penetration, achieving comprehensive water vapor barrier protection and significantly improving the lifespan and reliability of photovoltaic modules. In a preferred embodiment, the water vapor transmission rate of the substrate layer is ≤0.3 g / (m²). 2 • 24h); and / or, the water vapor transmission rate of the pressure-sensitive adhesive layer is ≤2g / (m2 • 24h); and / or, the moisture permeability of the tape is ≤0.08g / (m 2 •24h).

[0057] In another typical embodiment of the present invention, a double-glass structure product is also provided, with sealing tape around its perimeter, the sealing tape comprising the aforementioned tape. As mentioned above, the addition of sheet-like magnetic filler, especially the proportion of sheet-like magnetic filler in the first direction, can significantly enhance the moisture barrier capacity and aging resistance of the tape. When the aforementioned tape is used to encapsulate the double-glass structure product, the tape can tightly adhere to the edges of the functional material, effectively isolating external moisture, ensuring the long-term stable operation of the double-glass structure product, and adapting to complex environmental conditions, simplifying installation and maintenance.

[0058] In a preferred embodiment, the tape is wrapped around the surface of the functional material. When the tape is not aged, the 180° peel strength of the tape to the functional material is ≥6 N / cm. After boiling in water at 85°C for 24 hours or after PCT aging (121°C, 100% RH, 48 hours), the 180° peel strength of the tape to the functional material is ≥4 N / cm.

[0059] In a preferred embodiment, the functional material includes one or more of photovoltaic glass (including float glass and patterned glass), photovoltaic backsheet, and anodized aluminum. The tape of this application exhibits stronger adhesion to the aforementioned functional materials, ensuring that the tape maintains high peel strength even under harsh outdoor conditions, such as high temperature and high humidity environments. This effectively prevents moisture penetration, protects the photovoltaic module from environmental corrosion, and significantly extends the module's lifespan and reliability.

[0060] Typically, but not limitingly, the acute angle between the normal direction of the first-direction sheet magnetic filler and the winding axis of the tape is 0°, 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45° or any two of these values; and the weight percentage of the first-direction sheet magnetic filler in the sheet magnetic filler is 50%, 60%, 70%, 80%, 90%, 100% or any two of these values.

[0061] The present application will be further described in detail below with reference to specific embodiments, which should not be construed as limiting the scope of protection claimed in the present application.

[0062] Example 1

[0063] The composition of the tape is detailed in Table 1.

[0064] Preparation process of pressure-sensitive adhesive layer: The components of the pressure-sensitive adhesive layer are mixed with a solvent (specifically xylene, with a solvent-to-adhesive layer component weight ratio of 3:1) to obtain a mixture. This mixture is then coated onto a substrate layer. The mixture is treated under a magnetic field to orient the sheet-like magnetic filler. The mixture is then dried to obtain the pressure-sensitive adhesive layer. The mixing temperature is 55℃ for 60 minutes, the magnetic field strength is 600 mT, and the drying temperature is 130℃ for 4 minutes. See the schematic diagram of the tape and pressure-sensitive adhesive layer structure. Figure 1 Wherein, 1 represents sheet-like magnetic filler, 2 represents substrate layer; 11, sheet-like magnetic filler in the first direction; 12, sheet-like magnetic filler in the second direction; 7, release film layer; A, the direction of the tape winding axis; B, the normal direction of the sheet-like magnetic filler in the first direction; θ1, the acute angle between the normal direction of the sheet-like magnetic filler in the first direction and the direction of the tape winding axis, θ1 < 45°; C, the normal direction of the sheet-like magnetic filler in the second direction; θ2, the acute angle between the normal direction of the sheet-like magnetic filler in the second direction and the direction of the tape winding axis, θ2 > 45°.

[0065] The tape preparation process involves bonding the release film to the other side of the pressure-sensitive adhesive layer, then rolling and laminating at room temperature, and finally slitting to obtain the tape.

[0066] A double-glass structure product, specifically for encapsulating photovoltaic modules: The aforementioned tape is used to wrap the edges of the functional material (specifically, the photovoltaic glass composition) to prevent moisture from entering the film / cell layer. A schematic diagram illustrating the tape's application scenarios is shown below. Figure 2 In this context, 3 represents functional materials, 4 represents battery cells, 5 represents tape, and 6 represents silicone for the frame.

[0067] Examples 2 to 4

[0068] The only difference from Example 1 is:

[0069] The composition of the tapes varies; see Table 1 for details.

[0070] Examples 5 to 6

[0071] The only difference from Example 1 is:

[0072] The weight percentage of sheet magnetic material in the pressure-sensitive adhesive layer varies, as detailed in Table 1.

[0073] Examples 7 to 8

[0074] The only difference from Example 1 is:

[0075] The weight ratio and specific number of parts of the sheet-like magnetic filler to the plasticizer vary, as detailed in Table 1.

[0076] Examples 9 to 10

[0077] The only difference from Example 1 is:

[0078] The sheet-like magnetic filler is sheet-like nickel powder, as detailed in Table 2.

[0079] Examples 11 to 12

[0080] The only difference from Example 1 is:

[0081] The sheet-like magnetic filler is mica powder coated with iron(III) oxide, as detailed in Table 2.

[0082] Examples 13 to 14

[0083] The only difference from Example 1 is:

[0084] The sheet-like magnetic filler is sheet-like carbonyl iron powder, as detailed in Table 2.

[0085] Examples 15 to 16

[0086] The only difference from Example 1 is:

[0087] The sheet-like magnetic filler is sheet-like iron-silicon-aluminum alloy powder, as detailed in Table 2.

[0088] Example 17

[0089] The only difference from Example 1 is:

[0090] The sheet-like magnetic filler is sheet-like neodymium iron boron, as detailed in Table 3.

[0091] Example 18

[0092] The only difference from Example 1 is:

[0093] The sheet-like magnetic filler is sheet-like AlNiCo, as detailed in Table 3.

[0094] Examples 19 to 20

[0095] The only difference from Example 1 is:

[0096] The materials and thicknesses of the substrate layer and release film layer, as well as the thickness of the pressure-sensitive adhesive layer, are different, as detailed in Table 3.

[0097] Example 21

[0098] The only difference from Example 1 is:

[0099] The preparation process conditions for the pressure-sensitive adhesive layer are different; specifically, the magnetic field strength is 100mT.

[0100] Example 22

[0101] The only difference from Example 1 is:

[0102] The preparation process conditions for the pressure-sensitive adhesive layer are different; specifically, the magnetic field strength is 800mT.

[0103] Example 23

[0104] The only difference from Example 1 is:

[0105] The preparation process conditions for the pressure-sensitive adhesive layer are different. Specifically, the mixing temperature is about 25℃ and the time is 60 min, while the drying temperature is 160℃ and the time is 2 min.

[0106] Example 24

[0107] The only difference from Example 1 is:

[0108] The preparation process conditions for the pressure-sensitive adhesive layer are different. Specifically, the mixing temperature is about 35℃ and the time is 120 min, while the drying temperature is 100℃ and the time is 6 min.

[0109] Comparative Example 1

[0110] The only difference from Example 4 is that the pressure-sensitive adhesive layer does not include vulcanizing agents and sheet-like magnetic fillers, as detailed in Table 4.

[0111] Analysis revealed that the pressure-sensitive adhesive layer did not contain vulcanizing agents or sheet-like magnetic fillers, resulting in the lack of vulcanization and cross-linking of the pressure-sensitive adhesive, severe aging and deformation, increased moisture permeability of the tape, and decreased peel strength after aging.

[0112] Comparative Example 2

[0113] The only difference from Example 4 is that the pressure-sensitive adhesive layer uses commercially available acrylic pressure-sensitive adhesive, as detailed in Table 4.

[0114] Analysis shows that, due to the hydrophilic nature of acrylic pressure-sensitive adhesive, the moisture permeability of the pressure-sensitive adhesive layer is high, resulting in low peel strength after aging.

[0115] Comparative Example 3

[0116] The only difference from Example 4 is that the sheet filler is non-magnetic, as detailed in Table 4.

[0117] Analysis shows that because the sheet-like filler is non-magnetic, it is impossible to orient the filler. During the drying process, the filler is spread flat on the surface of the substrate and cannot effectively block moisture. Therefore, the pressure-sensitive adhesive layer has a high moisture permeability.

[0118] Comparative Example 4

[0119] The only difference from Example 4 is that the pressure-sensitive adhesive layer does not include sheet-like magnetic fillers, as detailed in Table 4.

[0120] Analysis revealed that the pressure-sensitive adhesive layer does not contain sheet-like magnetic fillers, thus failing to produce a labyrinth effect. This resulted in increased moisture permeability of the tape and decreased peel strength after aging.

[0121] Comparative Example 5

[0122] The only difference from Example 4 is that the content of sheet magnetic material in the pressure-sensitive adhesive layer is lower, as detailed in Table 4.

[0123] Analysis shows that the content of sheet-like magnetic material is too low to have a significant effect.

[0124] Comparative Example 6

[0125] The only difference from Example 4 is that the first direction sheet magnetic material accounts for a lower weight percentage of the sheet magnetic material, as detailed in Table 4.

[0126] Analysis shows that the low orientation ratio of the sheet-like filler significantly reduces its effectiveness.

[0127] The performance test results of the tapes prepared in the above embodiments and comparative examples are shown in Tables 5 to 9.

[0128] Test method:

[0129] Water vapor transmission rate of the tape:

[0130] Figure 3 This is a schematic diagram showing the position of the tape during the test of its moisture permeability. Figure 3 As shown, a 5cm × 0.5cm groove was cut in the center of a 40μm circular aluminum foil with a radius of 4cm. A 7.8cm long piece of 1cm wide adhesive tape was taken and attached to the circular aluminum foil, covering the groove so that the groove was centered on the tape. The prepared test piece was then placed in a water vapor transmission rate tester (MOCON AQUATRAN-W 3 / 38H) and the water vapor transmission rate was measured under the conditions of 85℃±0.5℃ and 100%RH±2%RH.

[0131] Peel strength: Refer to GBT 2792-1981, where the width of the test sample is 1 cm and the substrate is float glass.

[0132] Peel strength after aging: Place the test sample with a width of 1cm into the corresponding aging environment for aging, and after taking it out, place it in an environment of 20-25℃ for 6 hours, and test the peel strength according to GB / T 2792-1981.

[0133] DH aging: The aging environment is 85℃ and 85%RH.

[0134] Aging by boiling: The aging environment is a circulating water bath at 85℃.

[0135] PCT aging: The aging environment is 121℃ and 100%RH.

[0136] Table 1

[0137]

[0138]

[0139]

[0140] Table 2

[0141]

[0142]

[0143] Table 3

[0144]

[0145]

[0146] Table 4

[0147]

[0148]

[0149] Table 5

[0150]

[0151] Table 6

[0152]

[0153]

[0154] Table 7

[0155]

[0156] Table 8

[0157]

[0158] Table 9

[0159]

[0160] As can be seen from the above, compared with the comparative example, the present invention significantly improves the water-blocking performance of the tape in both the transverse and longitudinal directions by adding sheet-like magnetic fillers to the pressure-sensitive adhesive layer and adjusting the orientation of the sheet-like magnetic fillers in the pressure-sensitive adhesive layer, while taking into account the weather resistance and adhesive strength of the tape. When applied to objects that require water-blocking performance at the edges or where the tape is pasted, such as photovoltaic modules and laminated glass, it can provide effective protection and effectively extend the life of the modules.

[0161] Furthermore, it can be seen that the overall effect of the tape is better when all process parameters are within the preferred range of the present invention.

[0162] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A type of adhesive tape, characterized in that, The tape comprises a release film layer, a pressure-sensitive adhesive layer, and a substrate layer stacked sequentially. The pressure-sensitive adhesive layer includes sheet-like magnetic filler; The sheet-like magnetic filler includes a first-direction sheet-like magnetic filler and a second-direction sheet-like magnetic filler. The acute angle between the normal direction of the first-direction sheet-like magnetic filler and the winding axis direction of the tape is 0 to 45°. The first-direction sheet-like magnetic filler accounts for 50 to 100% of the weight of the sheet-like magnetic filler.

2. The tape according to claim 1, characterized in that, The types of magnetic fillers in the sheet-like magnetic fillers include soft magnetic materials and / or hard magnetic materials. The soft magnetic materials include one or more of ferrite soft magnets, metallic soft magnets, amorphous soft magnets, and nanocrystalline soft magnets. The hard magnetic materials include one or more of metallic permanent magnets, ferrite permanent magnets, and rare earth permanent magnets. Preferably, the sheet-like magnetic filler is a sheet-like soft magnetic material.

3. The tape according to claim 1, characterized in that, The aspect ratio of the sheet-like magnetic filler is 10 to 50; Preferably, the aspect ratio of the sheet-like magnetic filler is 30 to 50.

4. The tape according to claim 1, characterized in that, The remanence of the sheet-like magnetic filler is ≤0.1T; preferably, the remanence of the sheet-like magnetic filler is ≤0.05T.

5. The tape according to claim 1, characterized in that, In the pressure-sensitive adhesive layer, the weight percentage of the sheet-like magnetic filler is 2-15%.

6. The tape according to claim 1, characterized in that, By weight parts The pressure-sensitive adhesive layer comprises: rubber, tackifier, plasticizer, vulcanizing agent, vulcanization accelerator, activator, the sheet-like magnetic filler, non-magnetic filler, and antioxidant; Preferably, the pressure-sensitive adhesive layer comprises: 100 parts rubber, 40-80 parts tackifier, 0-40 parts plasticizer, 3-15 parts vulcanizing agent, 0-5 parts vulcanization accelerator, 0-5 parts activator, 5-20 parts the sheet-like magnetic filler, 0-20 parts non-magnetic filler, and 0.5-2 parts antioxidant; Preferably, the rubber includes one or more of the following: polybutadiene rubber, brominated butyl rubber, chlorinated butyl rubber, chlorinated rubber, chloroprene rubber, chlorosulfonated polyethylene, ethylene propylene diene monomer (EPDM) rubber, ethylene propylene diene monomer (EPDM) rubber, ethylene vinyl acetate rubber, butyl rubber, isoprene rubber, nitrile rubber, natural rubber, styrene-butadiene rubber, styrene-butadiene block copolymer, hydrogenated styrene-butadiene block copolymer, hydrogenated styrene-isoprene block copolymer, and styrene-isoprene-styrene block copolymer. Preferably, the tackifier includes one or more of terpene resin, petroleum resin, rosin resin, polyisobutylene, silane coupling agent and titanate coupling agent; Preferably, the plasticizer includes natural plasticizers and / or synthetic plasticizers; more preferably, the natural plasticizer includes one or more of mineral oil, vegetable oil, and liquid rubber; even more preferably, the mineral oil includes one or more of paraffin oil, naphthenic oil, aromatic oil, and chlorinated paraffin; even more preferably, the vegetable oil includes one or more of lanolin, pine oil, lecithin, and castor oil; even more preferably, the liquid rubber includes one or more of liquid polyisobutylene, liquid polybutadiene, liquid polybutene, liquid polyisoprene, and thermally degradable low molecular weight rubber with a number average molecular weight of less than 10,000; more preferably, the synthetic plasticizer includes dibutyl phthalate and / or tricresol phosphate. Preferably, the vulcanizing agent comprises one or more of sulfur, dicumyl peroxide, benzoyl peroxide, 1,1-di-tert-butylperoxy-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, 1,3-bis(tert-butylperoxyisopropyl)benzene, tetramethylthiuram disulfide, 4,4'-dithiobismorpholine, quinone compounds, phenolic resins, metal oxides, and isocyanates; more preferably, the metal oxide comprises one or more of lead oxide, zinc oxide, and magnesium oxide. Preferably, the vulcanization accelerator includes one or more of the following: dithiocarbamate rubber vulcanization accelerators, thiuram rubber vulcanization accelerators, thiourea rubber vulcanization accelerators, thiazole rubber vulcanization accelerators, sulfenamide rubber vulcanization accelerators, guanidine rubber vulcanization accelerators, organic amine rubber vulcanization accelerators, and xanthate rubber vulcanization accelerators. Preferably, the activator comprises stearic acid and / or stearate; Preferably, the non-magnetic filler includes one or more of the following: calcium carbonate, mica powder, talc powder, kaolin, glass powder, bentonite, molecular sieve, carbon black, titanium dioxide, barium sulfate, fumed silica, precipitated silica, silica micropowder, hollow glass microspheres, calcium oxide, and alumina. Preferably, the antioxidant includes one or more of antioxidant A, antioxidant D, p-phenylenediamine derivative, antioxidant 264, antioxidant 2246, antioxidant 1076, dilauryl thiodipropionate, nickel dibutyldithiocarbamate, antioxidant MB, and antioxidant MBZ.

7. The tape according to claim 1, characterized in that, The method for preparing the pressure-sensitive adhesive layer includes: mixing the components of the pressure-sensitive adhesive layer with a solvent to obtain a mixture; treating the mixture under a magnetic field to orient the sheet-like magnetic filler; and drying the mixture to obtain the pressure-sensitive adhesive layer.

8. The tape according to claim 7, characterized in that, The magnetic field strength is 100–800 mT; and / or, The drying temperature is 100–160°C, and the time is 2–6 minutes; and / or, The solvent includes one or more of toluene, xylene, n-hexane, cyclohexane, heptane, solvent gasoline, chloroform, turpentine, acetone, ethyl acetate, and butyl acetate, and the weight ratio of the solvent to the components of the pressure-sensitive adhesive layer is (2-10):

1.

9. The tape according to any one of claims 1 to 8, characterized in that, The substrate layer includes a metal foil or a coating. Preferably, the metal foil includes one or more of aluminum foil, copper foil, and stainless steel foil. Preferably, the coating includes one or more of silicon oxide, aluminum oxide, and aluminum plating. Preferably, the substrate layer further includes a plastic film, the plastic film comprising one or more of PET, PEN, PI, PP, PC, and PA; more preferably, the substrate layer comprises 1 to 2 layers of the plastic film; and / or, The thickness of the substrate layer is 20–40 μm; and / or, The thickness of the pressure-sensitive adhesive layer is 10–60 μm; and / or, The thickness of the release film is 25–125 μm.

10. A double-glass structure product, with sealing tape around all four sides, characterized in that, The sealing tape includes the tape according to any one of claims 1 to 9.

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