CN-122011967-A - Light conversion packaging adhesive film, preparation method thereof and judgment method of light conversion agent retention rate of light conversion packaging adhesive film

CN122011967ACN 122011967 ACN122011967 ACN 122011967ACN-122011967-A

Abstract

The application provides a light-converting packaging adhesive film, a preparation method thereof and a judgment method of light-converting agent retention rate of the light-converting packaging adhesive film. The light conversion packaging adhesive film comprises a substrate light conversion adhesive film layer, wherein the surface, close to a battery piece, of the substrate light conversion adhesive film layer is marked as a first surface, a UV indicator layer is locally arranged on the first surface, the substrate light conversion adhesive film layer comprises a light conversion agent, the UV indicator layer comprises a UV indicator, and the UV indicator and an ultraviolet absorption wave band of the light conversion agent are at least partially overlapped. The light conversion packaging adhesive film can intuitively reflect the retention rate condition of the light conversion agent through the color change of the UV indicator layer. The design not only avoids the direct detection of the state of the light conversion agent in the packaging adhesive film, but also simplifies the evaluation flow, so that the performance monitoring of the light conversion packaging adhesive film is more convenient and accurate, and the problem that the loss degree of the light conversion agent in the light conversion packaging adhesive film is difficult to judge in the prior art is solved.

Inventors

WANG HAONAN
HU XIAOBO
SANG YAN
HOU HONGBING

Assignees

杭州福斯特应用材料股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260211

Claims (10)

1. The light conversion packaging adhesive film is characterized by comprising a substrate light conversion adhesive film layer, wherein the surface, close to a battery piece, of the substrate light conversion adhesive film layer is marked as a first surface, and a UV indicator layer is locally arranged on the first surface; the substrate light-converting adhesive film layer comprises a light converting agent, and the UV indicator layer comprises a UV indicator; the UV indicator is at least partially coincident with the ultraviolet absorption band of the light converting agent.
2. The light-converting packaging film of claim 1, wherein the UV indicator layer comprises a plurality of patterned areas, the patterned areas being dot matrix, stripe, or corner areas; The area of each patterned area is 0.5cm 2 ~25cm 2 , preferably 5cm 2 ~15cm 2 ; The distance between two adjacent patterned areas is 0.3 m-1.5 m, preferably 0.4 m-0.8 m.
3. The light-converting packaging film according to claim 2, wherein the patterned areas consist of the UV-indicator layer having a thickness of 0.1 μm to 20 μm, preferably 0.5 μm to 12 μm.
4. The light-converting packaging film according to claim 2, wherein the patterned area is a transparent film comprising UV indicator, the UV indicator layer having a thickness of 0.05 mm-2 mm, preferably 0.5 mm-1 mm; The substrate light-to-film layer comprises the following components in parts by weight: 80-100 parts of a first matrix resin; 0.1-3 parts of a first crosslinking agent; 0.02-5 parts of a first auxiliary cross-linking agent; 0.02-2 parts of a first silane coupling agent; 0.005-2 parts of a first light stabilizer; 0.005-2 parts of light conversion agent; and/or, the transparent adhesive film comprises the following components in parts by weight: 80-100 parts of a second matrix resin; 0.1-3 parts of a second crosslinking agent; 0.02-5 parts of a second auxiliary cross-linking agent; 0.02-2 parts of a second silane coupling agent; 0.005-2 parts of a second light stabilizer; 0.005-2 parts of UV indicator; Wherein the UV indicator is a photochromic compound, preferably the photochromic compound is any one or more of a spiropyran compound and a derivative thereof, a spirooxazine compound and a derivative thereof, wherein the spiropyran compound is 1',3',3 '-trimethyl-6-nitrobenzospiropyran, and the spirooxazine compound is 1, 3-dihydro-1, 3-trimethylspiro [ 2H-indole-2, 3' - [3H ] naphtho [2,1-b ] [1,4] oxazine ]; And/or the light conversion agent is selected from any one or more of organic fluorescent light conversion agents, rare earth compound light conversion agents and quantum dot light conversion agents; And/or, the first matrix resin and the second matrix resin are each independently selected from any one or more of ethylene-vinyl acetate copolymer, ethylene-alpha-olefin copolymer, polyvinyl butyral, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl methacrylate copolymer, ethylene-butyl acrylate copolymer; And/or the first crosslinking agent and the second crosslinking agent are each independently selected from any one or more of 2, 5-dimethyl-2, 5-bis (t-butylperoxy) hexane, 1-bis (t-butylperoxy) cyclohexane, 2-bis (t-butylperoxy) butane, di-t-butyl peroxide, dicumyl peroxide, t-butyl peroxy-3, 5-trimethylhexanoate, n-butyl 4, 4-bis (t-amyl peroxy) valerate, ethyl 3, 3-bis (t-butylperoxy) butyrate; And/or, the first auxiliary crosslinking agent and the second auxiliary crosslinking agent are respectively and independently selected from any one or more of tri (2-hydroxyethyl) isocyanuric acid triacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate, ethoxylated pentaerythritol tetraacrylate, propoxylated pentaerythritol tetraacrylate, trimethylolpropane tetraacrylate and ethoxylated trimethylolpropane triacrylate; And/or, the first silane coupling agent and the second silane coupling agent are each independently selected from any one or more of gamma-aminopropyl triethoxysilane, gamma-aminopropyl trimethoxysilane, N- (beta-aminoethyl) -gamma-aminopropyl trimethoxysilane, diethylaminomethyl triethoxysilane, gamma-methacryloxypropyl trimethoxysilane, vinyl triethoxysilane; and/or the first light stabilizer and the second light stabilizer are each independently selected from bis-2, 6-tetramethylpiperidinol sebacate, bis (1-octyloxy-2, 6-tetramethyl-4-piperidyl) sebacate, N, N' -bis- (2, 6-tetramethyl-4-piperidinyl) -1, 6-hexanediamine, bis (1, 2, 6-pentamethyl-4-piperidinyl) sebacate any one or more of polymers of succinic acid and 4-hydroxy-2, 6-tetramethyl-1-piperidineethanol.
5. A method for preparing the optical rotary packaging adhesive film according to any one of claims 1 to 4, wherein the method comprises: Mixing raw materials comprising a first matrix resin, a first crosslinking agent, a first auxiliary crosslinking agent, a first silane coupling agent, a first light stabilizer and a light conversion agent, and then carrying out tape casting extrusion molding to form a substrate light conversion adhesive film layer; coating a UV indicator on the first surface of the substrate light-converting adhesive film layer locally, or attaching a transparent adhesive film on the first surface of the substrate light-converting adhesive film layer locally to form a UV indicator layer; before the UV indicator layer is formed, pre-crosslinking treatment is carried out on a local area, in which the UV indicator layer is arranged, in the substrate photo-conversion adhesive film layer, and the pre-crosslinking degree of the pre-crosslinking treatment is more than or equal to 20%.
6. The method according to claim 5, wherein the pre-crosslinking degree of the pre-crosslinking treatment is 35% -65%, preferably 55% -60%.
7. The method of claim 5, wherein the UV-indicator layer comprises a plurality of patterned areas, and wherein the forming the UV-indicator layer by lamination comprises: Mixing raw materials comprising a second matrix resin, a second crosslinking agent, a second auxiliary crosslinking agent, a second silane coupling agent, a second light stabilizer and a UV indicator, and then carrying out tape casting extrusion molding to form an initial transparent adhesive film; cutting the initial transparent adhesive film into a transparent adhesive film matched with the patterning block; Locally attaching the transparent adhesive film to the first surface of the substrate light-converting adhesive film layer in a heating and attaching mode; the initial transparent adhesive film has an areal density of 50g/m 2 ~200g/m 2 and a thickness of 0.05 mm-2 mm.
8. A method for determining the retention of a transfer agent in a light-converting encapsulant film according to any one of claims 1 to 3, comprising: Step S1, sequentially laminating front glass, the light conversion packaging adhesive film, the battery piece, the rear packaging adhesive film and the backboard according to any one of claims 1 to 3 to obtain a photovoltaic module; Step S2, testing b of a Lab region where the UV indicator is located in the photovoltaic module 0 A value; Step S3, respectively performing first aging treatment and second aging treatment on the photovoltaic module, placing the photovoltaic module after the first aging treatment in an ultraviolet environment for a certain time, and testing b of a Lab area where the UV indicator is located in the photovoltaic module 1 B, testing the b of the Lab area where the UV indicator is located in the photovoltaic module after the photovoltaic module subjected to the second aging treatment is placed in an ultraviolet environment for a certain time 2 A value; Definition of Δb 1 =b 0 -b 1 ,Δb 2 =b 0 -b 2 Retention of the light converting agent in the light converting encapsulant film = 100% - (Δb) x X 100% of (M), wherein x is 1 or 2; M is determined by testing b of Lab region where UV indicator is located in the module when the light conversion packaging adhesive film does not contain light conversion agent 0 And testing b of a Lab region where the UV indicator is located in the photovoltaic module after the photovoltaic module is placed in an ultraviolet environment for a certain time Value (b) 0 -b ) The absolute value of the value is M.
9. The method according to claim 8, wherein in the step S3, a UV lamp responsive to the UV indicator is selected, the area of the photovoltaic module where the UV indicator is disposed after the first aging treatment is irradiated for a fixed time, and the b of the area Lab of the photovoltaic module where the UV indicator is disposed is tested 1 Irradiating the region where the UV indicator is arranged in the photovoltaic module after the second aging treatment within a fixed time, and testing the b of the region Lab where the UV indicator is arranged in the photovoltaic module 2 A value; preferably, the fixed time is 5 s-10 s; And/or the conditions of the first aging treatment are 100kWh/m 2 ~130kWh/m 2 , and the conditions of the second aging treatment are 220kWh/m 2 ~250kW·h/m 2 .
10. The method according to claim 8, wherein the judging the failure state of the light conversion agent by the retention rate of the light conversion agent in the light conversion packaging film comprises: when delta b x When the retention rate of the light conversion agent in the light conversion packaging adhesive film is not more than 0 percent, the light conversion agent in the light conversion packaging adhesive film is completely invalid; When 0< Deltab x When the retention rate of the light conversion agent in the light conversion packaging adhesive film is less than 100%, the retention rate is 0% < M, which indicates that a part of the light conversion agent in the light conversion packaging adhesive film fails; when delta b x When=0, the retention rate of the light conversion agent in the light conversion packaging adhesive film=100% indicates that the light conversion agent in the light conversion packaging adhesive film has no loss, i.e. the light conversion agent has no failure at all.

Description

Light conversion packaging adhesive film, preparation method thereof and judgment method of light conversion agent retention rate of light conversion packaging adhesive film Technical Field The invention relates to the technical field of light-converting adhesive films, in particular to a light-converting packaging adhesive film, a preparation method thereof and a judgment method of light conversion agent retention rate of the light-converting packaging adhesive film. Background In the photovoltaic industry, the light conversion packaging adhesive film is used as an important packaging material, and can convert invisible light in solar spectrum into visible light, so that the photoelectric conversion efficiency of a photovoltaic module is improved, and the light conversion packaging adhesive film is widely applied. However, in the practical use process of the existing light conversion packaging adhesive film, the light conversion agent inside the adhesive film may gradually lose activity over time and under the influence of environmental factors, so that the light conversion efficiency is reduced. This process typically occurs in a closed environment within the photovoltaic module, and therefore, real-time monitoring of the light conversion agent and quantitative assessment of the failure state become an industry challenge. The time and the degree of failure of the light conversion adhesive film in the photovoltaic module are difficult to judge, so that corresponding solving measures are difficult to carry out according to the loss degree of the light conversion agent. In summary, it is important to develop a light conversion packaging film which can judge the loss degree of a light conversion agent by a special detection means. Disclosure of Invention The invention mainly aims to provide a light conversion packaging adhesive film, a preparation method thereof and a method for judging the retention rate of a light conversion agent in the light conversion packaging adhesive film, so as to solve the problem that the loss degree of the light conversion agent in the light conversion packaging adhesive film is difficult to judge in the prior art. In order to achieve the above object, according to one aspect of the present invention, there is provided a light-converting packaging film, the light-converting packaging film comprising a substrate light-converting film layer, wherein a surface of the substrate light-converting film layer, which is close to a battery piece, is denoted as a first surface, the first surface is locally provided with a UV indicator layer, the substrate light-converting film layer comprises a light-converting agent, the UV indicator layer comprises a UV indicator, and the UV indicator is at least partially overlapped with an ultraviolet absorption band of the light-converting agent. Further, the UV indicator layer includes a plurality of patterned areas, the patterned areas are dot patterns, stripe-shaped or corner areas, the area of each patterned area is 0.5cm 2~25cm2, preferably 5cm 2~15cm2, and the distance between two adjacent patterned areas is 0.3 m-1.5 m, preferably 0.4 m-0.8 m. Further, the patterned block is composed of a UV indicator layer having a thickness of 0.1 μm to 20 μm, preferably 0.5 μm to 12 μm. Further, the patterned block is a transparent adhesive film containing a UV indicator, the thickness of the UV indicator layer is 0.05-2 mm, preferably 0.5-1 mm, the substrate photo-adhesive film layer comprises, by weight, 80-100 parts of a first matrix resin, 0.1-3 parts of a first cross-linking agent, 0.02-5 parts of a first auxiliary cross-linking agent, 0.02-2 parts of a first silane coupling agent, 0.005-2 parts of a first light stabilizer, 0.005-2 parts of a light conversion agent, and/or the transparent adhesive film comprises, by weight, 80-100 parts of a second matrix resin, 0.1-3 parts of a second cross-linking agent, 0.02-5 parts of a second auxiliary cross-linking agent, 0.02-2 parts of a second silane coupling agent, 0.005-2 parts of a second cross-linking agent, 0.005-2 parts of a UV indicator, wherein the UV indicator is a photochromic compound, preferably a spiropyran compound and derivatives thereof, The spirooxazine compound and any one or more of the derivatives thereof, wherein the spiropyran compound is 1',3',3 '-trimethyl-6-nitrobenzospiropyran, the spirooxazine compound is 1, 3-dihydro-1, 3-trimethylspiro [ 2H-indole-2, 3' - [3H ] naphtho [2,1-b ] [1,4] oxazine ] and/or the light conversion agent is selected from any one or more of organic fluorescent light conversion agent, rare earth compound light conversion agent and quantum dot light conversion agent, and/or the first matrix resin and the second matrix resin are respectively and independently selected from ethylene-vinyl acetate copolymer, ethylene-alpha-olefin copolymer, polyvinyl butyral, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl methacrylate copolymer