Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following detailed description, but those skilled in the art will understand that the following described examples are some, not all, of the examples of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The high-reflection black glue film comprises a long-wave band high-reflection layer and a full-wave band high-reflection layer;
the long-wave-band high-reflection layer comprises the following components in parts by weight: 100 parts of matrix resin, 5-30 parts of modified resin and 1-10 parts of auxiliary agent;
the modified resin is mainly prepared from a matrix resin, high black-reflecting color master batches, a coupling agent and a tackifying resin in a mass ratio of 100: 1-16: 1-6.5: 0.5-6.5;
the high-reflection black master batch is mainly prepared from a modified black pigment, a high-light-reflection pigment and a reflection increasing monomer in a mass ratio of 100: 80-120: 1-5.
As in the different embodiments, the amount of the modified resin may be 5 parts, 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, etc. compared to 100 parts by weight of the base resin in the long wavelength band high reflection layer; the amount of the auxiliary may be 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, etc.
In a specific embodiment of the invention, the auxiliary comprises the following components in parts by weight: 0.4-2 parts of a cross-linking agent, 0.3-2 parts of an auxiliary cross-linking agent, 0.1-2 parts of a coupling agent, 0.1-2 parts of a light stabilizer and 0.1-2 parts of an antioxidant.
The auxiliary agent can adopt the conventional auxiliary agent in the field, and specifically can be as follows:
the crosslinking agent can be selected from at least one of peroxide crosslinking agents; the peroxide crosslinking agent comprises tert-butyl hydroperoxide, 1-di-tert-butyl peroxy-3, 3, 5-trimethylcyclohexane, tert-amyl peroxy-2-ethylhexyl carbonate, 2-ethylhexyl tert-butyl peroxycarbonate, 1-di-tert-butyl peroxycyclohexane, tert-butyl peroxy-2-ethylhexanoate, isopropyl tert-butyl peroxycarbonate and 1, 1-di-tert-amyl peroxy-3, 3, 5-trimethylcyclohexane;
the auxiliary crosslinking agent comprises any one or more of triallyl isocyanurate, triallyl cyanurate and trimethylolpropane triacrylate;
the coupling agent may be selected from silane coupling agents; the silane coupling agent comprises any one or more of vinyl trimethoxy silane, gamma-methacryloxypropyl trimethoxy silane, vinyl triethoxy silane, methacrylate silane and gamma-aminopropyl triethoxy silane;
the light stabilizer may be selected from hindered amine light stabilizers; the hindered amine light stabilizer is any one or more of 3, 5-di-tert-butyl-4-hydroxy-benzoic acid hexadecyl ester, sebacic acid bis-2, 2,6, 6-tetramethylpiperidyl alcohol ester, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 6-hexanediamine and tris (1,2,2,6, 6-pentamethyl-4-piperidyl) phosphite;
the antioxidant comprises any one or more of tris [2, 4-di-tert-butylphenyl ] phosphite, n-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate and pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ].
As in the different embodiments, the high contrast black masterbatch may be used in an amount of 1 wt%, 5 wt%, 8 wt%, 10 wt%, 12 wt%, 15 wt%, 16 wt%, etc. of the amount of the base resin in the modified resin; the coupling agent may be used in an amount of 1 wt%, 2 wt%, 3 wt%, 4 wt%, 5 wt%, 6 wt%, 6.5 wt%, etc. of the amount of the base resin; the tackifying resin may be used in an amount of 0.5 wt%, 1 wt%, 2 wt%, 3 wt%, 4 wt%, 5 wt%, 6 wt%, 6.5 wt%, etc. of the amount of the base resin.
As in the different embodiments, the amount of the high light reflection pigment in the high anti-black color masterbatch may be 80 wt%, 90 wt%, 100 wt%, 110 wt%, 120 wt%, etc. of the amount of the modified black pigment; the amount of the reflection-enhancing monomer may be 1 wt%, 2 wt%, 3 wt%, 4 wt%, 5 wt%, etc. of the amount of the modified black pigment.
In a specific embodiment of the present invention, the high light reflection pigment includes any one or more of anthraquinone, phthalocyanine, indigo, thioindigo, quinacridone, perylene, dioxazine, isoindoline, indolinone ring and azomethine type pigments.
In a specific embodiment of the invention, the anti-reflective monomer comprises any one or more of o-phenylphenoxyethyl acrylate, 2- (p-cumyl-phenoxy) -ethyl acrylate, benzyl methacrylate, ethoxylated bisphenol a (2EO) diacrylate, ethoxylated bisphenol a (3EO) diacrylate, ethoxylated bisphenol a (4EO) diacrylate and ethoxylated bisphenol a (2EO) dimethacrylate.
In a specific embodiment of the invention, the modified black pigment is mainly prepared from the black pigment, the nano-oxide and the coupling agent in a mass ratio of 100: 20-40: 1-5.
As in the different embodiments, the nano-oxide may be used in an amount of 20 wt%, 25 wt%, 30 wt%, 35 wt%, 40 wt%, etc. of the amount of the black pigment in the modified black pigment; the coupling agent may be used in an amount of 1 wt%, 2 wt%, 3 wt%, 4 wt%, 5 wt%, etc. of the black pigment.
In the research, the black adhesive film with the single-layer structure directly added with the high-light-reflection pigment has a low reflectivity of 700-1200 nm, so that the assembly prepared from the black adhesive film with the single-layer structure has poor power improvement effect and poor effect of inhibiting heat absorption of the black assembly.
In order to realize the high-reflectivity effect of the black adhesive film on a near infrared region, on one hand, the high-reflectivity black master batch is prepared by introducing the black pigment coated by the nano oxide and modified on the surface of the silane and matching with the high-reflectivity pigment for reflection enhancement modification, so that the synergistic gain of the modified black pigment and the high-reflectivity pigment is realized; on the other hand, through the structural form of the multilayer composite packaging adhesive film, the reflectivity of 700-1200 nm is greatly improved finally, the light utilization rate of the wave band is improved, the power of the assembly is improved, and meanwhile, the operation temperature of the assembly is further reduced.
In a specific embodiment of the present invention, the black pigment comprises any one or more of black iron oxide, black iron chromium, black copper chromium, black cobalt, antimony sulfide, black manganese iron, black manganese chromium nickel and black titanium iron.
In a specific embodiment of the present invention, the nano-oxide comprises any one or more of nano-zinc oxide, nano-silicon oxide and nano-aluminum oxide.
In a specific embodiment of the invention, the full-waveband high-reflectivity layer comprises the following components in parts by weight: 100 parts of matrix resin, 5-30 parts of high-reflection modified resin and 1-10 parts of auxiliary agent;
the high-reflection modified resin is mainly prepared from a matrix resin, a high-reflection white pigment, a coupling agent and a tackifying resin in a mass ratio of 100: 50-150: 1.6.5: 0.5-6.5.
As in the different embodiments, the amount of the high-reflection modified resin may be 5 parts, 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, etc. compared to 100 parts by weight of the base resin in the full-wavelength high-reflection layer; the amount of the auxiliary may be 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, etc.
The type and the dosage of the auxiliary agent of the full-wave band high-reflectivity layer can be the same as those of the auxiliary agent of the long-wave band high-reflectivity layer.
As in the different embodiments, the high reverse white pigment may be used in an amount of 50 wt%, 60 wt%, 70 wt%, 80 wt%, 90 wt%, 100 wt%, 110 wt%, 120 wt%, 130 wt%, 140 wt%, 150 wt%, etc. of the amount of the base resin in the high reverse modified resin; the coupling agent is used in an amount of 1 wt%, 2 wt%, 3 wt%, 4 wt%, 5 wt%, 6 wt%, 6.5 wt%, etc. of the base resin; the tackifying resin may be used in an amount of 0.5 wt%, 1 wt%, 2 wt%, 3 wt%, 4 wt%, 5 wt%, 6 wt%, 6.5 wt%, etc. of the amount of the base resin.
In a particular embodiment of the invention, the high reverse white pigment comprises any one or more of titanium dioxide, silica, zinc oxide, precipitated barium sulfate, talc, kaolin, quartz powder and mica.
In a specific embodiment of the present invention, the long wavelength band high reflection layer, the modified resin, the full wavelength band high reflection layer, and the matrix resin in the high reflection modified resin are each independently selected from any one or more of ethylene-vinyl acetate copolymer, ethylene-octene copolymer, ethylene-butene copolymer, low density polyethylene, linear low density polyethylene, ethylene-propylene copolymer, ethylene-hexene copolymer, ethylene propylene rubber, ethylene propylene diene rubber, styrene block copolymer, polymethyl methacrylate, and acrylic resin. Further, the melt index of the matrix resin is 5-30 g/10 min.
The matrix resin is conventionally adopted in the field of packaging adhesive films, and can be adjusted and selected according to actual requirements. In a preferred embodiment, the matrix resin is any one of an ethylene-vinyl acetate copolymer, an ethylene-octene copolymer, and an ethylene-butene copolymer.
In actual operation, the matrix resin in the long-wave band high-reflection layer, the modified resin, the full-wave band high-reflection layer and the high-reflection modified resin can be the same, so that the compatibility and the like of all components among the adhesive films are further ensured.
In a specific embodiment of the present invention, the coupling agents in the modified resin, the modified black pigment, and the high-reverse modified resin are each independently selected from any one or more of silane coupling agents. Further, the silane coupling agent includes vinyltrimethoxysilane, gamma-methacryloxypropyltrimethoxysilane, vinyltriethoxysilane, methacrylate silane, and gamma-aminopropyltriethoxysilane.
In a specific embodiment of the present invention, the tackifying resins in the modified resin and the high-reflection modified resin are each independently at least one selected from acrylic tackifying resins. Further, the acrylate tackifying resin comprises epoxy acrylate and amino acrylate.
In a specific embodiment of the present invention, the method for preparing the modified resin comprises: and (3) performing melt extrusion granulation on the mixture of the matrix resin, the high black masterbatch, the coupling agent and the tackifying resin. Further, the temperature of the melt extrusion is 100-200 ℃.
In practical practice, the preparation of the modified resin comprises: the melt extrusion was carried out in a twin screw extruder. Furthermore, the temperature of each zone of the double-screw extruder can be set to be 100-120 ℃ in the I zone, 110-130 ℃ in the II zone, 130-150 ℃ in the III zone, 135-160 ℃ in the IV zone, 140-190 ℃ in the V zone, 140-200 ℃ in the VI zone and 130-190 ℃ in the nose.
In a specific embodiment of the present invention, the method for preparing the high-reflection modified resin comprises: and (3) performing melt extrusion granulation on the mixture of the matrix resin, the high-reverse white pigment, the coupling agent and the tackifying resin. Further, the temperature of the melt extrusion is 100-200 ℃.
In practical operation, the preparation of the high-reflection modified resin comprises the following steps: the melt extrusion was carried out in a twin screw extruder. Furthermore, the temperature of each zone of the double-screw extruder can be set to be 100-120 ℃ in the I zone, 110-130 ℃ in the II zone, 130-150 ℃ in the III zone, 135-160 ℃ in the IV zone, 140-190 ℃ in the V zone, 140-200 ℃ in the VI zone and 130-190 ℃ in the nose.
In a specific embodiment of the present invention, the preparation method of the high black masterbatch comprises: and (3) performing melt extrusion granulation on the mixture of the modified black pigment, the high light reflection pigment and the reflection-increasing monomer. Further, the temperature of the melt extrusion is 110-160 ℃.
In practical operation, the preparation of the high black masterbatch comprises the following steps: the melt extrusion was carried out in a twin screw extruder. Furthermore, the temperature of each zone of the double-screw extruder can be set to be 140-145 ℃ in the I zone, 145-150 ℃ in the II zone, 150-155 ℃ in the III zone, 155-160 ℃ in the IV zone, 155-160 ℃ in the V zone, 155-160 ℃ in the VI zone and 155-160 ℃ in the nose.
In a specific embodiment of the present invention, the method for preparing the modified black pigment comprises: and (3) performing melt extrusion granulation on the mixture of the black pigment, the nano oxide and the coupling agent. Further, the temperature of the melt extrusion is 200-230 ℃.
In practice, the preparation of the modified black pigment comprises: the melt extrusion was carried out in a twin screw extruder. Further, the temperatures of the zones of the twin-screw extruder can be set as follows: 200-205 ℃ in the I area, 205-210 ℃ in the II area, 210-215 ℃ in the III area, 215-220 ℃ in the IV area, 220-225 ℃ in the V area, 220-230 ℃ in the VI area and 220-225 ℃ in the nose.
In a specific embodiment of the present invention, the black adhesive film has a three-layer structure or a two-layer structure. When the three-layer structure is adopted, the three-layer structure comprises a full-wave-band high-reflection layer, a first long-wave-band high-reflection layer and a second long-wave-band high-reflection layer, wherein the first long-wave-band high-reflection layer and the second long-wave-band high-reflection layer are respectively attached to two sides of the full-wave-band high-reflection layer, namely the first long-wave-band high-reflection layer, the full-wave-band high-reflection layer and the second long-wave-band high-reflection layer are attached to each other, and the thicknesses of the first long-wave-band high-reflection layer and the second long-wave-band high-reflection layer are the same; when the structure is a double-layer structure, the full-wave band high-reflection layer and the long-wave band high-reflection layer are arranged in a fit mode.
The black assembly prepared by the high-reflection black adhesive film with the double-layer structure can realize full black on the front side and full white on the back side, and the single glass assembly can be prepared optionally; the black assembly prepared by the three-layer structure high-reflection black packaging adhesive film can realize a positive and negative full-black appearance, and the prepared double-glass assembly is attractive in appearance.
In a specific embodiment of the invention, the thickness of the high-reflection black adhesive film is 0.3-1.5 mm. Further, the thickness of the full-wave band high-reflection layer accounts for 20% -40% of the thickness of the high-reflection black adhesive film, and for example, the thickness of the full-wave band high-reflection layer can be 0.06-0.6 mm, preferably 0.1-0.5 mm, and more preferably 0.2-0.4 mm.
The invention also provides a preparation method of the high-reflection black adhesive film, which comprises the following steps:
and carrying out multi-layer co-extrusion on the molten material of the components of the long-wave band high-reflection layer and the molten material of the components of the full-wave band high-reflection layer, then laminating, cooling to form a film, and then carrying out irradiation pre-crosslinking treatment.
In actual operation, the melting temperature of the components of the long-wave band high-reflection layer is 55-100 ℃; the melting temperature of the components of the full-wave-band high-reflection layer is 60-110 ℃.
Further, melting the components of the long-wave-band high-reflection layer by adopting a single-screw extruder; the temperature settings of the zones of the single screw extruder can be as follows: 55-80 ℃ in the I area, 60-85 ℃ in the II area, 70-90 ℃ in the III area, 75-95 ℃ in the IV area, 75-100 ℃ in the V area, 80-100 ℃ in the VI area and 100 ℃ in the handpiece; melting the components of the full-waveband high-reflection layer by adopting a single-screw extruder; the temperature settings of the zones of the single screw extruder can be as follows: the temperature of the I zone is 60-80 ℃, the temperature of the II zone is 65-85 ℃, the temperature of the III zone is 70-95 ℃, the temperature of the IV zone is 85-105 ℃, the temperature of the V zone is 90-110 ℃, the temperature of the VI zone is 95-110 ℃ and the temperature of the handpiece is 110 ℃.
In a specific embodiment of the present invention, the irradiation pre-crosslinking treatment is electron beam irradiation. Furthermore, the crosslinking degree of the pre-crosslinking treatment is 15-40%, namely, the irradiation pre-crosslinking treatment is carried out to ensure that the crosslinking degree reaches 15-40%.
In a specific embodiment of the present invention, the irradiation pre-crosslinking treatment is a one-sided irradiation pre-crosslinking treatment. Furthermore, the irradiation surface is a long-wave band high-reflection layer. Specifically, for a three-layer structure, the irradiation surface is a long-wave-band high-reflection layer with a shallow pattern surface; for a double-layer structure, the irradiation surface is a long-wave-band high-reflection layer with a shallow pattern surface.
The invention also provides an application of any one of the high-reflection black adhesive films in preparation of photovoltaic modules or decorative glass.
The high-reflection black adhesive film can be widely applied to the fields of BIPV building integration, roof components, power station components, architectural decoration glass and the like.
In particular embodiments of the invention, the photovoltaic module comprises a building photovoltaic module.
In a specific embodiment of the invention, the photovoltaic module comprises a single glass module or a dual glass module.
In a specific embodiment of the invention, the photovoltaic module comprises glass, a transparent packaging adhesive film, a battery piece, a high-reflection black adhesive film and a glass/back plate which are sequentially attached; and the long-wave-band high-reflection layer of the high-reflection black adhesive film is attached to the back surface of the battery piece.
The cell slice comprises a crystalline silicon or amorphous silicon cell slice.
In a specific embodiment of the invention, the decorative glass comprises two layers of glass, and the high-reflection black glue film is arranged between the two layers of glass.
In practical operation, the photovoltaic module and the device glass can be prepared by laminating through a vacuum laminating machine at the temperature of 140-150 ℃.
Specific information of the matrix resin used in the following examples is as follows, but not limited thereto:
ethylene-vinyl acetate copolymer, MI 25g/10min (2.16kg, 190 ℃);
ethylene-1-octene copolymer, MI ═ 10g/10min (2.16kg, 190 ℃).
Example 1
The embodiment provides a high-reflection black adhesive film and a preparation method thereof, wherein the preparation method comprises the following steps:
(1) preparing a modified black pigment: weighing the iron oxide black, the nano zinc oxide, the nano aluminum oxide and the gamma-methacryloxypropyl trimethoxy silane according to the mass ratio of 100: 15: 4, uniformly mixing in a high-speed mixer, then putting the obtained materials into a double-screw extruder for melt extrusion, and granulating and drying to obtain the modified black pigment. Wherein the temperature of each zone of the double-screw extruder is set as follows: 200-205 ℃ in the I area, 205-210 ℃ in the II area, 210-215 ℃ in the III area, 215-220 ℃ in the IV area, 220-225 ℃ in the V area, 220-230 ℃ in the VI area and 220-225 ℃ in the nose.
(2) Preparing a high black color master batch: weighing the modified black pigment in the step (1), 3 ' -dioxo-2, 2 ' -biindolyl-5, 5 ' -disulfonic acid disodium salt and o-phenylphenoxyethyl acrylate according to the mass ratio of 100: 5, uniformly mixing in a high-speed mixer, then putting the obtained materials into a double-screw extruder for melt extrusion, and granulating and drying to obtain the high-anti-black color master batch. Wherein the temperature of each zone of the double-screw extruder is set as follows: the temperature of the first zone is 100-105 ℃, the temperature of the second zone is 110-120 ℃, the temperature of the third zone is 130-140 ℃, the temperature of the fourth zone is 135-150 ℃, the temperature of the fourth zone is 140-160 ℃, the temperature of the sixth zone is 140-160 ℃ and the temperature of the machine head is 140-160 ℃.
(3) Preparing modified resin: and (3) weighing the ethylene-vinyl acetate copolymer, the high-black master batch obtained in the step (2), the gamma-methacryloxypropyltrimethoxysilane and the amino acrylate according to the mass ratio of 100: 16: 2: 3, uniformly mixing in a high-speed mixer, then putting the obtained materials into a double-screw extruder for melt extrusion, and granulating and drying to obtain the modified resin. Wherein the temperature of each zone of the double-screw extruder is set as follows: the temperature of the first zone is 100-105 ℃, the temperature of the second zone is 110-120 ℃, the temperature of the third zone is 130-140 ℃, the temperature of the fourth zone is 135-150 ℃, the temperature of the fourth zone is 140-160 ℃, the temperature of the sixth zone is 140-160 ℃ and the temperature of the machine head is 140-160 ℃.
(4) Preparing high-reflection modified resin: weighing the ethylene-vinyl acetate copolymer, the titanium dioxide, the gamma-methacryloxypropyltrimethoxysilane and the amino acrylate according to the mass ratio of 100: 3, uniformly mixing in a high-speed mixer, then putting the obtained materials into a double-screw extruder for melt extrusion, and granulating and drying to obtain the high-reverse modified resin. Wherein the temperature of each zone of the double-screw extruder is set as follows: the temperature of the first zone is 100-105 ℃, the temperature of the second zone is 110-120 ℃, the temperature of the third zone is 130-140 ℃, the temperature of the fourth zone is 135-150 ℃, the temperature of the fourth zone is 140-160 ℃, the temperature of the sixth zone is 140-160 ℃ and the temperature of the machine head is 140-160 ℃.
(5) Preparing a high-reflection black adhesive film with a three-layer structure: respectively putting raw material components of a long-wave band high-reflection layer and raw material components of a full-wave band high-reflection layer which are mixed in proportion into two single-screw extruders of a three-layer co-extrusion casting machine, respectively melting, conveying to a co-extrusion die head, distributing the melted materials of the long-wave band high-reflection layer to an upper layer and a lower layer by a distributor at the inlet of the die head, distributing the melted materials of the full-wave band high-reflection layer to a middle layer, conveying to the outlet of the same co-extrusion die head for converging, drawing by using an embossing roller (the temperature is 55-65 ℃), cooling by using a cooling roller (the temperature is 20-30 ℃), forming a film, and obtaining a film material with a three-layer structure, wherein the drawing ratio is 0.9-1.1; and then, carrying out single-side pre-crosslinking treatment on the film material by electron beam irradiation equipment (the irradiation surface is a long-wave-band high-reflection layer with a shallow pattern surface), and controlling the pre-crosslinking degree to be 20-30% to obtain the high-reflection black adhesive film. In the three-layer structure of the high-reflection black adhesive film, the thickness of the full-wave band high-reflection layer is 0.2mm, the thickness of the long-wave band high-reflection layers on the two sides is 0.2mm respectively, and the thickness of the high-reflection black adhesive film is 0.6 mm.
Wherein, the raw material components of the long-wave band high-reflection layer which are mixed according to the proportion comprise 100 parts of ethylene-vinyl acetate copolymer, 0.6 part of tert-butyl peroxydicarbonate-2-ethylhexyl ester, 0.6 part of triallyl isocyanurate, 0.5 part of gamma-methacryloxypropyl trimethoxy silane, 0.1 part of bis-2, 2,6, 6-tetramethyl piperidinol sebacate, 0.1 part of tris [2, 4-di-tert-butylphenyl ] phosphite and 10 parts of modified resin according to the parts by weight; the raw material components of the full-wave band high-reflection layer which are mixed according to the proportion comprise 100 parts of ethylene-vinyl acetate copolymer, 0.6 part of tert-butyl peroxydicarbonate-2-ethylhexyl ester, 0.6 part of triallyl isocyanurate, 0.5 part of gamma-methacryloxypropyl trimethoxy silane, 0.1 part of bis-2, 2,6, 6-tetramethyl piperidinol sebacate, 0.1 part of tri [2, 4-di-tert-butylphenyl ] phosphite and 15 parts of high-reflection modified resin according to the parts by weight.
The temperature of each zone of the single screw extruder into which the raw material components of the long-wave band high-reflection layer are mixed according to the proportion is set as follows: melting the material with the long-wave band high-reflection layer at 55-80 ℃ in the I area, 65-85 ℃ in the II area, 70-90 ℃ in the III area, 75-95 ℃ in the IV area, 75-100 ℃ in the V area, 80-100 ℃ in the VI area and 100 ℃ in the machine head; the temperature of each zone of the single screw extruder into which the raw material components of the full-waveband high-reflection layer mixed in proportion are fed is set as follows: and the temperature of the first zone is 60-80 ℃, the temperature of the second zone is 65-85 ℃, the temperature of the third zone is 70-95 ℃, the temperature of the fourth zone is 85-105 ℃, the temperature of the fifth zone is 90-110 ℃, the temperature of the sixth zone is 95-110 ℃ and the temperature of the head is 110 ℃ to obtain the melted material of the full-wave band high-reflection layer.
Example 2
This example refers to the highly reflective black glue film of example 1 and the preparation method thereof, and the difference is only that: in the step (5), the high-reflection black adhesive film has a different structure and a different co-extrusion method, and the high-reflection black adhesive film of the embodiment has a double-layer structure.
The preparation method of the high-reflection black glue film with the double-layer structure comprises the following steps: respectively putting raw material components of a long-wave band high-reflection layer and raw material components of a full-wave band high-reflection layer which are mixed in proportion into two single-screw extruders of a double-layer co-extrusion casting machine, respectively melting, conveying to a co-extrusion die head, distributing the melted materials of the long-wave band high-reflection layer to the upper layer by a distributor at the inlet of the die head, distributing the melted materials of the full-wave band high-reflection layer to the lower layer, conveying to the outlet of the same co-extrusion die head to converge, carrying out traction by using an embossing roller (the temperature is 55-65 ℃) and carrying out cooling film formation by using a cooling roller (the temperature is 20-30 ℃), wherein the draft ratio is 0.9-1.1, and preparing a film material with a double-layer structure; and then, carrying out single-side pre-crosslinking treatment on the film material by electron beam irradiation equipment (the irradiation surface is a long-wave-band high-reflection layer with a shallow pattern surface), and controlling the pre-crosslinking degree to be 20-30% to obtain the high-reflection black adhesive film. In the double-layer structure of the high-reflection black glue film, the thickness of the long-wave band high-reflection layer is 0.4mm, and the thickness of the full-wave band high-reflection layer is 0.2 mm.
Example 3
This example refers to the highly reflective black glue film of example 1 and the preparation method thereof, and the difference is only that: the matrix resin and the modified resin have different components.
In the long-wave band high-reflection layer, the modified resin, the full-wave band high-reflection layer and the high-reflection modified resin of the embodiment, the matrix resin ethylene-vinyl acetate copolymer is replaced by the ethylene-1-octene copolymer. The modified resin of this example had the following composition: ethylene-1-octene copolymer, high contrast black masterbatch, gamma-methacryloxypropyltrimethoxysilane and aminoacrylates in mass ratios 100: 8: 1.5: 2.
Example 4
This example refers to the highly reflective black glue film of example 1 and the preparation method thereof, and the difference is only that: the high-reflection modified resin has different components.
The high-reflection modified resin of the present example comprises the following components: ethylene vinyl acetate copolymer, titanium dioxide, vinyltrimethoxysilane and epoxy acrylate at a mass ratio of 100: 150: 4: 5.
Example 5
This embodiment provides encapsulation dual glass assembly: the high-reflection black adhesive film of the embodiment 1 is adopted to package the double-glass assembly according to the conventional process, during packaging, the long-wave-band high-reflection layer of the irradiation surface in the high-reflection black adhesive film is attached to the back surface of the battery piece, the long-wave-band high-reflection layer of the non-irradiation surface is attached to the back surface glass, the transparent packaging adhesive film is attached to the front surface of the battery piece, after lamination (lamination according to the sequence of front surface glass/transparent packaging adhesive film/battery piece/black adhesive film/back surface glass), the battery piece/black adhesive film/back surface glass is placed in a vacuum laminator, and lamination is carried out for 15min at 145 ℃. The glass of the packaged double-glass assembly is conventional photovoltaic glass, the cell is 60P-type PERC double-sided cells, and the transparent packaging adhesive film is a transparent EVA adhesive film (manufacturer: Lushan, model: EV1050G 2).
Example 6
This embodiment provides encapsulation single glass assembly: the high-reflection black adhesive film of the embodiment 2 is adopted to package the single-glass component according to the conventional process, during packaging, the long-wave band high-reflection layer of the high-reflection black adhesive film is attached to the back surface of the battery piece, the full-wave band high-reflection layer is attached to the back plate, the transparent packaging adhesive film is attached to the front surface of the battery piece, and the battery piece is stacked (stacked according to the sequence of front glass/transparent packaging adhesive film/battery piece/black adhesive film/back plate) and placed into a vacuum laminator to be laminated for 15min at 145 ℃. The glass of the packaged single-glass assembly is conventional photovoltaic glass, the back plate is a KPF type back plate, the cell pieces are 60P type PERC double-sided cell pieces, and the transparent packaging adhesive film is a transparent EVA adhesive film (manufacturer: Lushan, model: EV1050G 2).
Example 7
The present embodiment provides an encapsulated black decorative glass: the high-reflection black adhesive film of the embodiment 1 is adopted, the decorative glass is packaged according to the conventional process, and the glass/the high-reflection black adhesive film/the glass are overlapped in sequence and then placed into a vacuum laminating machine for laminating for 15min at 145 ℃. The encapsulated glass is conventional decorative glass.
Comparative example 1
Comparative example 1 the highly reflective black adhesive film of reference example 1 and the preparation method thereof were distinguished in that: the modified resin has different components.
The modified resin of comparative example 1 had the following composition: ethylene vinyl acetate copolymer, iron oxide black, gamma-methacryloxypropyltrimethoxysilane and aminoacrylates in mass ratios 100: 16: 2: 3.
Comparative example 2
Comparative example 2 referring to the highly reflective black glue film of example 1 and the preparation method thereof, the difference is that: the modified resin has different components.
The modified resin of comparative example 2 had the following composition: ethylene vinyl acetate copolymer, iron oxide black, disodium 3,3 ' -dioxo-2, 2 ' -biindolyl-5, 5 ' -disulfonate, gamma-methacryloxypropyltrimethoxysilane and aminoacrylate in mass ratios of 100: 8: 2: 3.
Comparative example 3
Comparative example 3 the highly reflective black adhesive film of reference example 1 and the preparation method thereof were distinguished in that: the high black contrast color master batch has different components and preparation methods.
The preparation method of the high black contrast color master batch of comparative example 3 comprises the following steps: weighing the iron oxide black, the 3,3 ' -dioxo-2, 2 ' -biindolyl-5, 5 ' -disulfonic acid disodium salt, the nano zinc oxide, the nano aluminum oxide, the gamma-methacryloxypropyltrimethoxysilane and the o-phenylphenoxyethyl acrylate according to the mass ratio of 100: 15: 4: 5, uniformly mixing in a high-speed mixer, and then putting the obtained materials into a double-screw extruder for melt extrusion, granulation and drying to obtain the high-contrast black master batch. The twin screw extruder temperature settings were the same as in example 1, step (2).
Comparative example 4
Comparative example 4 provides a glue film comprising only a long-wavelength band high-reflection layer having a thickness of 0.6mm, without a full-wavelength band high-reflection layer. The composition of the long wavelength band high reflection layer is the same as that of the long wavelength band high reflection layer in example 1.
Comparative example 5
An EVA Black encapsulating film (manufacturer: Lushan, model: EV1050G7) is commercially available.
Comparative example 6
A photovoltaic black backsheet (manufacturer: CYBRID, model: Cynagard 225A) is commercially available.
Comparative examples 7 to 11
Comparative examples 7-11 provide an encapsulated dual glass assembly, with reference to the method of example 5, except that: in comparative examples 7 to 11, the packaging films of comparative examples 1 to 5 were used to replace the high-reflective black adhesive film for packaging; among them, comparative examples 4 to 5 are single-layer films, and it is not necessary to distinguish between front and back surface packages.
Comparative example 12
Comparative example 12 provides an encapsulated single glass assembly, with reference to the method of example 6, except that: comparative example 12 the black back sheet of comparative example 6 was used for sealing, and the laminate was formed by laminating the front glass/transparent EVA film EV1050G 2/battery sheet/transparent EVA film EV1050G 1/black back sheet of comparative example 6 in this order. Both EV1050G2 and EV1050G1 are single-layer films, and front-back surface packaging is not required to be distinguished.
Experimental example 1
In order to comparatively illustrate the performance of the adhesive packaging films of the different examples and comparative examples of the present invention, the following performance tests were performed, and the test results are shown in tables 1 and 2.
And (3) reflectivity testing: respectively testing the reflectivities of 400-700 nm and 700-1200 nm by adopting an ultraviolet visible spectrophotometer lambda 950;
and (3) testing the temperature rise of the photovoltaic module, the power consumption of the module and the PID test of the module by adopting a conventional method of the photovoltaic module according to the standard IEC61215 and IEC 61730.
The preparation of samples corresponding to each detection item is as follows: the reflectivity test sample is a laminated single adhesive film (a release film/a single adhesive film/a release film are sequentially laminated, and lamination is carried out for 15min at 145 ℃; and the component temperature rise, power boost and PID attenuation test sample is a laminated component sample.
TABLE 1 test results for different adhesive films
Remarking: in the test result of the light reflectivity of 400-1200 nm in the embodiment 2, the front side corresponds to the reflectivity of the long-wave band high-reflectivity layer, and the back side corresponds to the reflectivity of the full-wave band high-reflectivity layer; the reflectivity test side of the remaining examples and comparative examples was the reflectivity of a pre-crosslinked layer.
TABLE 2 test results of different assemblies
From the test results, the high-reflection black adhesive film can keep pure black appearance and simultaneously realize the reflectivity of more than 68% in the 700-1200 nm wave band, and the black assembly prepared by the high-reflection black adhesive film can realize great temperature reduction compared with a common black assembly, so that the CTM of the photovoltaic assembly is improved, the power of the assembly is further improved, and the actual power is improved by about 5% -7.5%. Meanwhile, after PID (proportion integration differentiation) tests of the components, the components prepared by the high-reflection black glue film have better PID resistance, the attenuation of the power of the components is reduced, and the service life of the black components is greatly prolonged.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.