CN104479271A - Thin film for solar cell back plate and preparation method of thin film - Google Patents
Thin film for solar cell back plate and preparation method of thin film Download PDFInfo
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- CN104479271A CN104479271A CN201410847201.5A CN201410847201A CN104479271A CN 104479271 A CN104479271 A CN 104479271A CN 201410847201 A CN201410847201 A CN 201410847201A CN 104479271 A CN104479271 A CN 104479271A
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Abstract
The invention relates to the technical filed of solar cells and particularly relates to a thin film for a solar cell back plate and a preparation method of the thin film. A concave-convex latticed structure is arranged on a surface of the thin film, the thin film is 15 to 150 mum in thickness and comprises the following raw materials in parts by weight: 40 to 80 parts of acrylate resin, 20 to 60 parts of fluororesin, 10 to 30 parts of nanofiller, 5 to 15 parts of heat conductive fillers, 5 to 15 parts of a cross-linking agent, 1 to 5 parts of a coupling agent, 0.5 to 1.5 parts of an anti-ultraviolet agent and 0.5 to 1.5 part of an antioxygen. The thin film provided by the invention is excellent in adhesive force, high in hardness, less susceptible to scratching and excellent in thermal conductivity, has a high binding force with EVA, and is anti-aging and less susceptible to delaminating.
Description
Technical field
The present invention relates to technical field of solar batteries, be specifically related to a kind of solar cell backboard film and preparation method thereof.
Background technology
Solar cell is that low iron toughened glass, silicon chip, EVA glue and notacoria are prepared through lamination.Because solar cell is directly exposed in air, be vulnerable to the erosion of water vapour, sour gas, high/low temperature and ultraviolet etc., cause its photoelectric conversion performance degradation, therefore the provide protection of solar cell backboard film is very important, and research also highly significant.
The coating adhesion of existing solar cell backboard film is poor, and coating hardness is low, easily scratches in use procedure, and heat conductivility is poor, little with EVA bonding force, aging easy delamination.
Summary of the invention
In order to overcome the shortcoming and defect existed in prior art, the object of the present invention is to provide a kind of solar cell backboard film, this adhesive force is good, and hardness is high, not easily scratches, and thermal conductivity is good, strong with EVA bonding force, anti-aging, not easily delamination.
The object of the present invention is to provide a kind of preparation method of solar cell backboard film, this preparation method's technique is simple, and convenient operation and control, steady quality, production efficiency is high, can large-scale industrial production.
Object of the present invention is achieved through the following technical solutions: a kind of solar cell backboard film, and the surface of described film is provided with concavo-convex fenestral fabric, and the thickness of film is 15-150 μm, and film comprises the raw material of following weight part:
Acrylate resin 40-80 part
Fluoro-resin 20-60 part
Nano filling 10-30 part
Heat conductive filler 5-15 part
Linking agent 1-5 part
Coupling agent 1-5 part
Anti UV agent 0.5-1.5 part
Oxidation inhibitor 0.5-1.5 part;
Described acrylate resin comprises the raw material of following weight part: methacrylic acid 1-5 part, acrylate 1-5 part, methacrylic ester 20-30 part, methacrylic acid hydroxyl ester 10-20 part, vinylbenzene 5-10 part, initiator 1-5 part and solvent 40-60 part.
Preferably, the mixture that is made up of with weight ratio 2-3:1.5-2.5:1 methyl acrylate, ethyl propenoate and ethyl acrylate of described acrylate; The mixture that described methacrylic ester is made up of with weight ratio 1.6-2.4:1:0.8-1.2 methyl methacrylate, isopropyl methacrylate and cyclohexyl methacrylate; The mixture that methacrylic acid hydroxyl ester is made up of with weight ratio 1.4-2.2:1 hydroxyethyl methylacrylate and Rocryl 410; The mixture that described initiator is made up of with weight ratio 2.5-4.5:1.5-2.5:1 Diisopropyl azodicarboxylate, dibenzoyl peroxide and dilauroyl peroxide, the mixture that described solvent is made up of with weight ratio 1.8-2.6:1 N-BUTYL ACETATE and methyl iso-butyl ketone (MIBK).
Preferably, the mixture that is made up of with weight ratio 1:1.8-2.6:3-4 tetrafluoroethylene, polyvinylidene difluoride (PVDF) and ethylene-tetrafluoroethylene copolymer of described fluoro-resin.
Preferably, the mixture that is made up of with weight ratio 1:0.8-1.2 nano silicon and nano titanium oxide of described Nano filling.
Preferably, the mixture that is made up of with weight ratio 2-3:1.5-2.5:1 nano aluminum nitride, nm-class boron nitride and nanometer silicon carbide of described heat conductive filler.
Preferably, the mixture that is made up of with weight ratio 8-10:1 crosslinking and curing agent and additional crosslinker of described linking agent; The mixture that described crosslinking and curing agent is made up of with weight ratio 1:0.8-1.2 organo-peroxide and azo-compound.
The present invention uses as crosslinker compounding by adopting crosslinking and curing agent and additional crosslinker, and to control its weight ratio be 8-10:1, further employing organo-peroxide and azo-compound are as the composite use of crosslinking and curing agent, and to control its weight ratio be 1:0.8-1.2, make intensity and the good springiness of EVA adhesive film.
Described organo-peroxide is the mixture be made up of with weight ratio 1.8-2.6:0.8-1.2:1 di-isopropylbenzene hydroperoxide, the peroxidation-2-ethylhexyl carbonate tert-butyl ester and 3,3-bis-(t-butyl peroxy) ethyl butyrate.
The present invention is by adopting di-isopropylbenzene hydroperoxide, the peroxidation-2-ethylhexyl carbonate tert-butyl ester and 3,3-bis-(t-butyl peroxy) ethyl butyrate is as the composite use of organo-peroxide, and to control its weight ratio be 1.8-2.6:0.8-1.2:1, make intensity and the good springiness of EVA adhesive film.The azo-compound that the present invention adopts is the azo-compound that this area is commonly used, azo-compound and AZO, the compound that azo-group-N=N-is connected with two alkyl and generates, general formula R-N=N-R '.
The mixture that described additional crosslinker is made up of with weight ratio 1:1.4-2.2 triallyl cyanurate and diethyleneglycol dimethacrylate(DEGDMA).
The present invention is by adopting triallyl cyanurate and diethyleneglycol dimethacrylate(DEGDMA) as the composite use of additional crosslinker, and to control its weight ratio be 1:1.4-2.2, makes intensity and the good springiness of EVA adhesive film.
Preferably, the mixture that is made up of with weight ratio 1.4-2.2:1:2-3 vinyltriacetoxy silane, vinyl three tert-butyl peroxide silane and vinyl three ('beta '-methoxy oxyethyl group) silane of described coupling agent.
The present invention is by adopting vinyltriacetoxy silane, vinyl three tert-butyl peroxide silane and vinyl three ('beta '-methoxy oxyethyl group) silane as the composite use of coupling agent, and to control its weight ratio be 1.4-2.2:1:2-3, the viscosity of molten synthetic resin can be reduced, improve the dispersity of weighting agent to improve processing characteristics, and then make goods obtain good surface quality and machinery, heat and electrical property.
Preferably, described anti UV agent is the mixture be made up of with weight ratio 1:1.8-2.6 4-benzoyloxy-2,2,6,6-tetramethyl piperidine and Octabenzone.
The present invention is by adopting 4-benzoyloxy-2,2,6,6-tetramethyl piperidine and Octabenzone as the composite use of anti UV agent, and obtained film uvioresistant is effective, substantially increases the work-ing life of goods in exposure air.
Preferably, the mixture that is made up of with weight ratio 1:1-2 antioxidant 1010 and irgasfos 168 of described oxidation inhibitor.
The present invention is by adopting antioxidant 1010 and irgasfos 168 as the composite use of oxidation inhibitor, and to control its weight ratio be 1:1-2, two kinds of oxidation inhibitor are environmental protection oxidation inhibitor and have certain synergy, can delay or suppress the carrying out of material oxidation process, thus stop the aging of material and extend its work-ing life.
Another object of the present invention is achieved through the following technical solutions: a kind of preparation method of solar cell backboard film, comprises the steps:
(1) first above-mentioned raw materials is mixed through mixer, obtain mixture;
(2) dropped in casting machine by step (1) gained mixture, extrude at 100-180 DEG C through plasticizing, through having steel rider and the rubber rollers calendering of concaveconvex structure, obtained thickness is 15-150 μm and surface is provided with the film of concavo-convex fenestral fabric.
Beneficial effect of the present invention is: film of the present invention carries out modification by adopting acrylate resin to fluoro-resin, and adopts linking agent and coupling agent to overcome the consistency of two kinds of resins, and adhesive force is good, can stand hot and humid severe environment.
Film of the present invention is by adopting Nano filling, and significantly promote coating hardness, product is in use not easily scratched or occurs cut.
Film of the present invention is by adopting heat conductive filler, and thermal conductivity is good, and backboard thermal conductivity is brought up to 0.5 W/m DEG C from 0.2 W/m DEG C, thus reduces solar module operating temperature, improves assembly operating power.
Film of the present invention, by arranging concavo-convex fenestral fabric on its surface, increases specific surface area, thus locks with coating formation mechanical tong when silica gel or EVA adhesive film solidification, significantly improves external cohesive force, with EVA bonding force by force, anti-aging, not easily delamination.
Film water vapor transmittance of the present invention is < 1g/m
2d, OTR oxygen transmission rate < 0.5cm
3/ m
224hatm.
Preparation method's technique of the present invention is simple, and convenient operation and control, steady quality, production efficiency is high, can large-scale industrial production.
Embodiment
For the ease of the understanding of those skilled in the art, below in conjunction with embodiment, the present invention is further illustrated, and the content that embodiment is mentioned not is limitation of the invention.
Embodiment 1
A kind of solar cell backboard film, the surface of described film is provided with concavo-convex fenestral fabric, and the thickness of film is 15 μm, and film comprises the raw material of following weight part:
Acrylate resin 40 parts
Fluoro-resin 20 parts
Nano filling 10 parts
Heat conductive filler 5-15 part
Linking agent 1 part
Coupling agent 1 part
Anti UV agent 0.5 part
0.5 part, oxidation inhibitor;
Described acrylate resin comprises the raw material of following weight part: methacrylic acid 1 part, acrylate 1 part, methacrylic ester 20 parts, methacrylic acid hydroxyl ester 10 parts, vinylbenzene 5-10 part, initiator 1 part and solvent 40 parts.
The mixture that described acrylate is made up of with weight ratio 2:1.5:1 methyl acrylate, ethyl propenoate and ethyl acrylate; The mixture that described methacrylic ester is made up of with weight ratio 1.6:1:0.8 methyl methacrylate, isopropyl methacrylate and cyclohexyl methacrylate; The mixture that methacrylic acid hydroxyl ester is made up of with weight ratio 1.4:1 hydroxyethyl methylacrylate and Rocryl 410; The mixture that described initiator is made up of with weight ratio 2.5:1.5:1 Diisopropyl azodicarboxylate, dibenzoyl peroxide and dilauroyl peroxide, the mixture that described solvent is made up of with weight ratio 1.8:1 N-BUTYL ACETATE and methyl iso-butyl ketone (MIBK).
The mixture that described fluoro-resin is made up of with weight ratio 1:1.8:3 tetrafluoroethylene, polyvinylidene difluoride (PVDF) and ethylene-tetrafluoroethylene copolymer.
The mixture that described Nano filling is made up of with weight ratio 1:0.8 nano silicon and nano titanium oxide.
The mixture that described heat conductive filler is made up of with weight ratio 2:1.5:1 nano aluminum nitride, nm-class boron nitride and nanometer silicon carbide.
The mixture that described linking agent is made up of with weight ratio 8:1 crosslinking and curing agent and additional crosslinker; The mixture that described crosslinking and curing agent is made up of with weight ratio 1:0.8 organo-peroxide and azo-compound; Described organo-peroxide is the mixture be made up of with weight ratio 1.8:0.8:1 di-isopropylbenzene hydroperoxide, the peroxidation-2-ethylhexyl carbonate tert-butyl ester and 3,3-bis-(t-butyl peroxy) ethyl butyrate; The mixture that described additional crosslinker is made up of with weight ratio 1:1.4 triallyl cyanurate and diethyleneglycol dimethacrylate(DEGDMA).
The mixture that described coupling agent is made up of with weight ratio 1.4:1:2 vinyltriacetoxy silane, vinyl three tert-butyl peroxide silane and vinyl three ('beta '-methoxy oxyethyl group) silane.
Described anti UV agent is the mixture be made up of with weight ratio 1:1.8 4-benzoyloxy-2,2,6,6-tetramethyl piperidine and Octabenzone.
The mixture that described oxidation inhibitor is made up of with weight ratio 1:1 antioxidant 1010 and irgasfos 168.
A preparation method for solar cell backboard film, comprises the steps:
(1) first above-mentioned raw materials is mixed through mixer, obtain mixture;
(2) dropped in casting machine by step (1) gained mixture, extrude at 100 DEG C through plasticizing, through having steel rider and the rubber rollers calendering of concaveconvex structure, obtained thickness is 15 μm and surface is provided with the film of concavo-convex fenestral fabric.
Embodiment 2
A kind of solar cell backboard film, the surface of described film is provided with concavo-convex fenestral fabric, and the thickness of film is 45 μm, and film comprises the raw material of following weight part:
Acrylate resin 50 parts
Fluoro-resin 30 parts
Nano filling 15 parts
Heat conductive filler 7 parts
Linking agent 2 parts
Coupling agent 2 parts
Anti UV agent 0.7 part
0.7 part, oxidation inhibitor;
Described acrylate resin comprises the raw material of following weight part: methacrylic acid 2 parts, acrylate 2 parts, methacrylic ester 22 parts, methacrylic acid hydroxyl ester 12 parts, vinylbenzene 6 parts, initiator 2 parts and solvent 45 parts.
The mixture that described acrylate is made up of with weight ratio 2.2:1.7:1 methyl acrylate, ethyl propenoate and ethyl acrylate; The mixture that described methacrylic ester is made up of with weight ratio 1.8:1:0.9 methyl methacrylate, isopropyl methacrylate and cyclohexyl methacrylate; The mixture that methacrylic acid hydroxyl ester is made up of with weight ratio 1.6:1 hydroxyethyl methylacrylate and Rocryl 410; The mixture that described initiator is made up of with weight ratio 3:1.7:1 Diisopropyl azodicarboxylate, dibenzoyl peroxide and dilauroyl peroxide, the mixture that described solvent is made up of with weight ratio 2:1 N-BUTYL ACETATE and methyl iso-butyl ketone (MIBK).
The mixture that described fluoro-resin is made up of with weight ratio 1:2:3.2 tetrafluoroethylene, polyvinylidene difluoride (PVDF) and ethylene-tetrafluoroethylene copolymer.
The mixture that described Nano filling is made up of with weight ratio 1:0.9 nano silicon and nano titanium oxide.
The mixture that described heat conductive filler is made up of with weight ratio 2.2:1.7:1 nano aluminum nitride, nm-class boron nitride and nanometer silicon carbide.
The mixture that described linking agent is made up of with weight ratio 8.5:1 crosslinking and curing agent and additional crosslinker; The mixture that described crosslinking and curing agent is made up of with weight ratio 1:0.9 organo-peroxide and azo-compound; Described organo-peroxide is the mixture be made up of with weight ratio 2:0.9:1 di-isopropylbenzene hydroperoxide, the peroxidation-2-ethylhexyl carbonate tert-butyl ester and 3,3-bis-(t-butyl peroxy) ethyl butyrate; The mixture that described additional crosslinker is made up of with weight ratio 1:1.6 triallyl cyanurate and diethyleneglycol dimethacrylate(DEGDMA).
The mixture that described coupling agent is made up of with weight ratio 1.6:1:2.2 vinyltriacetoxy silane, vinyl three tert-butyl peroxide silane and vinyl three ('beta '-methoxy oxyethyl group) silane.
Described anti UV agent is the mixture be made up of with weight ratio 1:2 4-benzoyloxy-2,2,6,6-tetramethyl piperidine and Octabenzone.
The mixture that described oxidation inhibitor is made up of with weight ratio 1:1.2 antioxidant 1010 and irgasfos 168.
A preparation method for solar cell backboard film, comprises the steps:
(1) first above-mentioned raw materials is mixed through mixer, obtain mixture;
(2) dropped in casting machine by step (1) gained mixture, extrude at 120 DEG C through plasticizing, through having steel rider and the rubber rollers calendering of concaveconvex structure, obtained thickness is 45 μm and surface is provided with the film of concavo-convex fenestral fabric.
Embodiment 3
A kind of solar cell backboard film, the surface of described film is provided with concavo-convex fenestral fabric, and the thickness of film is 75 μm, and film comprises the raw material of following weight part:
Acrylate resin 60 parts
Fluororesin 40 part
Nano filling 20 parts
Heat conductive filler 7 parts
Linking agent 3 parts
Coupling agent 3 parts
Anti UV agent 1 part
1 part, oxidation inhibitor;
Described acrylate resin comprises the raw material of following weight part: methacrylic acid 3 parts, acrylate 3 parts, methacrylic ester 25 parts, methacrylic acid hydroxyl ester 15 parts, vinylbenzene 7 parts, initiator 3 parts and solvent 50 parts.
The mixture that described acrylate is made up of with weight ratio 2.5:2:1 methyl acrylate, ethyl propenoate and ethyl acrylate; The mixture that described methacrylic ester is made up of with weight ratio 2:1:1 methyl methacrylate, isopropyl methacrylate and cyclohexyl methacrylate; The mixture that methacrylic acid hydroxyl ester is made up of with weight ratio 1.8:1 hydroxyethyl methylacrylate and Rocryl 410; The mixture that described initiator is made up of with weight ratio 3.5:2:1 Diisopropyl azodicarboxylate, dibenzoyl peroxide and dilauroyl peroxide, the mixture that described solvent is made up of with weight ratio 2.2:1 N-BUTYL ACETATE and methyl iso-butyl ketone (MIBK).
The mixture that described fluoro-resin is made up of with weight ratio 1:2.2:3.5 tetrafluoroethylene, polyvinylidene difluoride (PVDF) and ethylene-tetrafluoroethylene copolymer.
The mixture that described Nano filling is made up of with weight ratio 1:1 nano silicon and nano titanium oxide.
The mixture that described heat conductive filler is made up of with weight ratio 2.5:2:1 nano aluminum nitride, nm-class boron nitride and nanometer silicon carbide.
The mixture that described linking agent is made up of with weight ratio 9:1 crosslinking and curing agent and additional crosslinker; The mixture that described crosslinking and curing agent is made up of with weight ratio 1:1 organo-peroxide and azo-compound; Described organo-peroxide is the mixture be made up of with weight ratio 2.2:1:1 di-isopropylbenzene hydroperoxide, the peroxidation-2-ethylhexyl carbonate tert-butyl ester and 3,3-bis-(t-butyl peroxy) ethyl butyrate; The mixture that described additional crosslinker is made up of with weight ratio 1:1.8 triallyl cyanurate and diethyleneglycol dimethacrylate(DEGDMA).
The mixture that described coupling agent is made up of with weight ratio 1.8:1:2.5 vinyltriacetoxy silane, vinyl three tert-butyl peroxide silane and vinyl three ('beta '-methoxy oxyethyl group) silane.
Described anti UV agent is the mixture be made up of with weight ratio 1:2.2 4-benzoyloxy-2,2,6,6-tetramethyl piperidine and Octabenzone.
The mixture that described oxidation inhibitor is made up of with weight ratio 1:1.5 antioxidant 1010 and irgasfos 168.
A preparation method for solar cell backboard film, comprises the steps:
(1) first above-mentioned raw materials is mixed through mixer, obtain mixture;
(2) dropped in casting machine by step (1) gained mixture, extrude at 140 DEG C through plasticizing, through having steel rider and the rubber rollers calendering of concaveconvex structure, obtained thickness is 75 μm and surface is provided with the film of concavo-convex fenestral fabric.
Embodiment 4
A kind of solar cell backboard film, the surface of described film is provided with concavo-convex fenestral fabric, and the thickness of film is 110 μm, and film comprises the raw material of following weight part:
Acrylate resin 70 parts
Fluoro-resin 50 parts
Nano filling 25 parts
Heat conductive filler 12 parts
Linking agent 4 parts
Coupling agent 4 parts
Anti UV agent 1.2 parts
1.2 parts, oxidation inhibitor;
Described acrylate resin comprises the raw material of following weight part: methacrylic acid 4 parts, acrylate 4 parts, methacrylic ester 28 parts, methacrylic acid hydroxyl ester 18 parts, vinylbenzene 8 parts, initiator 4 parts and solvent 55 parts.
The mixture that described acrylate is made up of with weight ratio 2.8:2.2:1 methyl acrylate, ethyl propenoate and ethyl acrylate; The mixture that described methacrylic ester is made up of with weight ratio 2.2:1:1.1 methyl methacrylate, isopropyl methacrylate and cyclohexyl methacrylate; The mixture that methacrylic acid hydroxyl ester is made up of with weight ratio 2:1 hydroxyethyl methylacrylate and Rocryl 410; The mixture that described initiator is made up of with weight ratio 4:2.2:1 Diisopropyl azodicarboxylate, dibenzoyl peroxide and dilauroyl peroxide, the mixture that described solvent is made up of with weight ratio 2.4:1 N-BUTYL ACETATE and methyl iso-butyl ketone (MIBK).
The mixture that described fluoro-resin is made up of with weight ratio 1:2.4:3.8 tetrafluoroethylene, polyvinylidene difluoride (PVDF) and ethylene-tetrafluoroethylene copolymer.
The mixture that described Nano filling is made up of with weight ratio 1:1.1 nano silicon and nano titanium oxide.
The mixture that described heat conductive filler is made up of with weight ratio 2.8:2.2:1 nano aluminum nitride, nm-class boron nitride and nanometer silicon carbide.
The mixture that described linking agent is made up of with weight ratio 9.5:1 crosslinking and curing agent and additional crosslinker; The mixture that described crosslinking and curing agent is made up of with weight ratio 1:1.1 organo-peroxide and azo-compound; Described organo-peroxide is the mixture be made up of with weight ratio 2.4:1.1:1 di-isopropylbenzene hydroperoxide, the peroxidation-2-ethylhexyl carbonate tert-butyl ester and 3,3-bis-(t-butyl peroxy) ethyl butyrate; The mixture that described additional crosslinker is made up of with weight ratio 1:2 triallyl cyanurate and diethyleneglycol dimethacrylate(DEGDMA).
The mixture that described coupling agent is made up of with weight ratio 2:1:2.8 vinyltriacetoxy silane, vinyl three tert-butyl peroxide silane and vinyl three ('beta '-methoxy oxyethyl group) silane.
Described anti UV agent is the mixture be made up of with weight ratio 1:2.4 4-benzoyloxy-2,2,6,6-tetramethyl piperidine and Octabenzone.
The mixture that described oxidation inhibitor is made up of with weight ratio 1:1.8 antioxidant 1010 and irgasfos 168.
A preparation method for solar cell backboard film, comprises the steps:
(1) first above-mentioned raw materials is mixed through mixer, obtain mixture;
(2) dropped in casting machine by step (1) gained mixture, extrude at 160 DEG C through plasticizing, through having steel rider and the rubber rollers calendering of concaveconvex structure, obtained thickness is 110 μm and surface is provided with the film of concavo-convex fenestral fabric.
Embodiment 5
A kind of solar cell backboard film, the surface of described film is provided with concavo-convex fenestral fabric, and the thickness of film is 150 μm, and film comprises the raw material of following weight part:
Acrylate resin 80 parts
Fluoro-resin 60 parts
Nano filling 30 parts
Heat conductive filler 15 parts
Linking agent 5 parts
Coupling agent 5 parts
Anti UV agent 1.5 parts
1.5 parts, oxidation inhibitor;
Described acrylate resin comprises the raw material of following weight part: methacrylic acid 5 parts, acrylate 5 parts, methacrylic ester 30 parts, methacrylic acid hydroxyl ester 20 parts, vinylbenzene 10 parts, initiator 5 parts and solvent 60 parts.
The mixture that described acrylate is made up of with weight ratio 3:2.5:1 methyl acrylate, ethyl propenoate and ethyl acrylate; The mixture that described methacrylic ester is made up of with weight ratio 2.4:1:1.2 methyl methacrylate, isopropyl methacrylate and cyclohexyl methacrylate; The mixture that methacrylic acid hydroxyl ester is made up of with weight ratio 2.2:1 hydroxyethyl methylacrylate and Rocryl 410; The mixture that described initiator is made up of with weight ratio 4.5:2.5:1 Diisopropyl azodicarboxylate, dibenzoyl peroxide and dilauroyl peroxide, the mixture that described solvent is made up of with weight ratio 2.6:1 N-BUTYL ACETATE and methyl iso-butyl ketone (MIBK).
The mixture that described fluoro-resin is made up of with weight ratio 1:2.6:4 tetrafluoroethylene, polyvinylidene difluoride (PVDF) and ethylene-tetrafluoroethylene copolymer.
The mixture that described Nano filling is made up of with weight ratio 1:1.2 nano silicon and nano titanium oxide.
The mixture that described heat conductive filler is made up of with weight ratio 3:2.5:1 nano aluminum nitride, nm-class boron nitride and nanometer silicon carbide.
The mixture that described linking agent is made up of with weight ratio 10:1 crosslinking and curing agent and additional crosslinker; The mixture that described crosslinking and curing agent is made up of with weight ratio 1:1.2 organo-peroxide and azo-compound; Described organo-peroxide is the mixture be made up of with weight ratio 2.6:1.2:1 di-isopropylbenzene hydroperoxide, the peroxidation-2-ethylhexyl carbonate tert-butyl ester and 3,3-bis-(t-butyl peroxy) ethyl butyrate; The mixture that described additional crosslinker is made up of with weight ratio 1:2.2 triallyl cyanurate and diethyleneglycol dimethacrylate(DEGDMA).
The mixture that described coupling agent is made up of with weight ratio 2.2:1:3 vinyltriacetoxy silane, vinyl three tert-butyl peroxide silane and vinyl three ('beta '-methoxy oxyethyl group) silane.
Described anti UV agent is the mixture be made up of with weight ratio 1:2.6 4-benzoyloxy-2,2,6,6-tetramethyl piperidine and Octabenzone.
The mixture that described oxidation inhibitor is made up of with weight ratio 1:2 antioxidant 1010 and irgasfos 168.
A preparation method for solar cell backboard film, comprises the steps:
(1) first above-mentioned raw materials is mixed through mixer, obtain mixture;
(2) dropped in casting machine by step (1) gained mixture, extrude at 180 DEG C through plasticizing, through having steel rider and the rubber rollers calendering of concaveconvex structure, obtained thickness is 150 μm and surface is provided with the film of concavo-convex fenestral fabric.
Film of the present invention carries out modification by adopting acrylate resin to fluoro-resin, and adopts linking agent and coupling agent to overcome the consistency of two kinds of resins, and adhesive force is good, can stand hot and humid severe environment.Film of the present invention is by adopting Nano filling, and significantly promote coating hardness, product is in use not easily scratched or occurs cut.Film of the present invention is by adopting heat conductive filler, and thermal conductivity is good, and backboard thermal conductivity is brought up to 0.5 W/m DEG C from 0.2 W/m DEG C, thus reduces solar module operating temperature, improves assembly operating power.Film of the present invention, by arranging concavo-convex fenestral fabric on its surface, increases specific surface area, thus locks with coating formation mechanical tong when silica gel or EVA adhesive film solidification, significantly improves external cohesive force, with EVA bonding force by force, anti-aging, not easily delamination.Film water vapor transmittance of the present invention is < 1g/m
2d, OTR oxygen transmission rate < 0.5cm
3/ m
224hatm.
Above-described embodiment is the present invention's preferably implementation, and in addition, the present invention can also realize by alternate manner, and any apparent replacement is all within protection scope of the present invention without departing from the inventive concept of the premise.
Claims (10)
1. a solar cell backboard film, is characterized in that: the surface of described film is provided with concavo-convex fenestral fabric, and the thickness of film is 15-150 μm, and film comprises the raw material of following weight part:
Acrylate resin 40-80 part
Fluoro-resin 20-60 part
Nano filling 10-30 part
Heat conductive filler 5-15 part
Linking agent 1-5 part
Coupling agent 1-5 part
Anti UV agent 0.5-1.5 part
Oxidation inhibitor 0.5-1.5 part;
Described acrylate resin comprises the raw material of following weight part: methacrylic acid 1-5 part, acrylate 1-5 part, methacrylic ester 20-30 part, methacrylic acid hydroxyl ester 10-20 part, vinylbenzene 5-10 part, initiator 1-5 part and solvent 40-60 part.
2. a kind of solar cell backboard film according to claim 1, is characterized in that: the mixture that described acrylate is made up of with weight ratio 2-3:1.5-2.5:1 methyl acrylate, ethyl propenoate and ethyl acrylate; The mixture that described methacrylic ester is made up of with weight ratio 1.6-2.4:1:0.8-1.2 methyl methacrylate, isopropyl methacrylate and cyclohexyl methacrylate; The mixture that methacrylic acid hydroxyl ester is made up of with weight ratio 1.4-2.2:1 hydroxyethyl methylacrylate and Rocryl 410; The mixture that described initiator is made up of with weight ratio 2.5-4.5:1.5-2.5:1 Diisopropyl azodicarboxylate, dibenzoyl peroxide and dilauroyl peroxide, the mixture that described solvent is made up of with weight ratio 1.8-2.6:1 N-BUTYL ACETATE and methyl iso-butyl ketone (MIBK).
3. a kind of solar cell backboard film according to claim 1, is characterized in that: the mixture that described fluoro-resin is made up of with weight ratio 1:1.8-2.6:3-4 tetrafluoroethylene, polyvinylidene difluoride (PVDF) and ethylene-tetrafluoroethylene copolymer.
4. a kind of solar cell backboard film according to claim 1, is characterized in that: the mixture that described Nano filling is made up of with weight ratio 1:0.8-1.2 nano silicon and nano titanium oxide.
5. a kind of solar cell backboard film according to claim 1, is characterized in that: the mixture that described heat conductive filler is made up of with weight ratio 2-3:1.5-2.5:1 nano aluminum nitride, nm-class boron nitride and nanometer silicon carbide.
6. a kind of solar cell backboard film according to claim 1, is characterized in that: the mixture that described linking agent is made up of with weight ratio 8-10:1 crosslinking and curing agent and additional crosslinker; The mixture that described crosslinking and curing agent is made up of with weight ratio 1:0.8-1.2 organo-peroxide and azo-compound; Described organo-peroxide is the mixture be made up of with weight ratio 1.8-2.6:0.8-1.2:1 di-isopropylbenzene hydroperoxide, the peroxidation-2-ethylhexyl carbonate tert-butyl ester and 3,3-bis-(t-butyl peroxy) ethyl butyrate; The mixture that described additional crosslinker is made up of with weight ratio 1:1.4-2.2 triallyl cyanurate and diethyleneglycol dimethacrylate(DEGDMA).
7. a kind of solar cell backboard film according to claim 1, is characterized in that: the mixture that described coupling agent is made up of with weight ratio 1.4-2.2:1:2-3 vinyltriacetoxy silane, vinyl three tert-butyl peroxide silane and vinyl three ('beta '-methoxy oxyethyl group) silane.
8. a kind of solar cell backboard film according to claim 1, it is characterized in that: described anti UV agent is by 4-benzoyloxy-2, the mixture that 2,6,6-tetramethyl piperidine and Octabenzone form with weight ratio 1:1.8-2.6.
9. a kind of solar cell backboard film according to claim 1, is characterized in that: the mixture that described oxidation inhibitor is made up of with weight ratio 1:1-2 antioxidant 1010 and irgasfos 168.
10. the preparation method of a kind of solar cell backboard film according to claim 1, is characterized in that: comprise the steps:
(1) first above-mentioned raw materials is mixed through mixer, obtain mixture;
(2) dropped in casting machine by step (1) gained mixture, extrude at 100-180 DEG C through plasticizing, through having steel rider and the rubber rollers calendering of concaveconvex structure, obtained thickness is 15-150 μm and surface is provided with the film of concavo-convex fenestral fabric.
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| CN107195717A (en) * | 2017-05-15 | 2017-09-22 | 江苏东昇光伏科技有限公司 | Solar cell backboard |
| CN108084613A (en) * | 2017-12-28 | 2018-05-29 | 安徽荣泽科技有限公司 | Excellent polyacrylate modified polyvinylidene difluoride film of a kind of uvioresistant performance and preparation method thereof |
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| CN108102305A (en) * | 2017-11-22 | 2018-06-01 | 纳琳威纳米科技南通有限公司 | A kind of preparation method and its usage for the high heat conduction plastics that insulate |
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| CN109705444A (en) * | 2018-12-19 | 2019-05-03 | 上海同晋环保科技有限公司 | A kind of polyfluoro compounding ETFE film and decorative panel |
| CN112961611A (en) * | 2020-12-23 | 2021-06-15 | 烟台德邦科技股份有限公司 | Acrylate structural adhesive with high thermal conductivity, high reliability and rapid curing |
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| CN112961611A (en) * | 2020-12-23 | 2021-06-15 | 烟台德邦科技股份有限公司 | Acrylate structural adhesive with high thermal conductivity, high reliability and rapid curing |
| CN112961611B (en) * | 2020-12-23 | 2023-02-03 | 烟台德邦科技股份有限公司 | Acrylate structural adhesive with high thermal conductivity, high reliability and rapid curing |
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