CN109749369B - Solar cell back film - Google Patents
Solar cell back film Download PDFInfo
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- CN109749369B CN109749369B CN201811441823.2A CN201811441823A CN109749369B CN 109749369 B CN109749369 B CN 109749369B CN 201811441823 A CN201811441823 A CN 201811441823A CN 109749369 B CN109749369 B CN 109749369B
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- solar cell
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- density polyethylene
- acrylic resin
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention relates to the technical field of back films, in particular to a solar cell back film. The outer layer of the solar cell back film comprises polyethylene terephthalate, high-density polyethylene, thermoplastic resin, polyamide and acrylic resin, the middle layer comprises polypropylene, polymethyl methacrylate, engineering plastics, acrylic resin, an antioxidant and polystyrene-terminated maleic anhydride, and the inner layer comprises linear low-density polyethylene, carbon black, an ultraviolet absorbent, a light stabilizer, an antioxidant and acrylate. The production process of a back plate manufacturer is simplified by the solar cell back film, the procedure of glue coating is reduced, granulation is carried out in a double-screw extruder, the obtained three layers of raw materials are respectively subjected to high-temperature co-extrusion and are superposed according to the structure of the solar cell back plate, a high-temperature roller is adopted for grafting reaction, and then the three layers of laminated solar back plates are obtained through co-extrusion, so that the reject ratio of the back plates caused by improper gluing control is eliminated, and the productivity and the finished product qualification rate of the back plates can be greatly improved.
Description
Technical Field
The invention relates to a back film, in particular to a solar cell back film.
Background
The solar back sheet plays a crucial role in protecting the service life of the cell as an important packaging material of the solar cell. The solar backboard is positioned on the back of the solar cell panel, plays a role in protecting and supporting the cell, and has reliable insulativity, water resistance and aging resistance. The coating generally has a three-layer structure, an outer-layer protective layer has good environmental erosion resistance, and three layers of films are bonded by using an adhesive. The method is characterized in that a PET film is coated and compounded on one surface, and then another PET film is coated and compounded on the other surface, so that the process is complex, a large amount of labor is needed in the operation, the health of operators is adversely affected by long-term operation, and the phenomena of separation and falling off can occur in the long-term use process.
Disclosure of Invention
The invention aims to solve the defects and provides a solar cell back film.
In order to overcome the defects in the background art, the technical scheme adopted by the invention for solving the technical problems is as follows: the solar cell back film comprises an outer layer, a middle layer and an inner layer from top to bottom in sequence, wherein the outer layer is a weather-resistant layer, the middle layer is a structure enhancement layer, the inner layer is a modified EVA bonding layer,
the outer layer comprises polyethylene glycol terephthalate, high-density polyethylene, thermoplastic resin, polyamide and acrylic resin, and is composed of the following components in parts by weight:
80-95 parts of polyethylene glycol terephthalate
0 to 15 portions of high-density polyethylene
1-5 parts of thermoplastic resin
2-5 parts of polyamide
1-6 parts of acrylic resin
The middle layer comprises polypropylene, polymethyl methacrylate, engineering plastics, acrylic resin, an antioxidant and polystyrene grafted maleic anhydride, and is composed of the following components in parts by weight:
90-98 parts of polypropylene
0-10 parts of polymethyl methacrylate
2-5 parts of engineering plastic
1-5 parts of acrylic resin
0.1-2 parts of antioxidant
0-5 parts of polystyrene grafted maleic anhydride
The inner layer comprises linear low-density polyethylene, carbon black, an ultraviolet absorbent, a light stabilizer, an antioxidant and acrylic ester, and is composed of the following components in parts by weight:
50-95 parts of linear low-density polyethylene
10-30 parts of carbon black
3-6 parts of ultraviolet absorbent
1-5 parts of light stabilizer
0.1-2 parts of antioxidant
1-5 parts of acrylic ester
According to another embodiment of the present invention, it is further included that the thermoplastic resin is a polyphenylene sulfide resin or a polyethylene resin.
According to another embodiment of the present invention, it is further included that the engineering plastic is one or more of polyamide, polytetrafluoroethylene, ABS plastic, polyoxymethylene, polycarbonate.
According to another embodiment of the invention, the materials of the outer layer, the middle layer and the inner layer are put into a high-speed mixer according to the formula and are uniformly mixed, then the materials are put into a double-screw extruder to be mixed and modified to prepare the raw materials of respective films, and the obtained three layers of raw materials are subjected to high-temperature co-extrusion and one-time continuous production to prepare the film.
The invention has the beneficial effects that: the production process of a back plate manufacturer is simplified by the solar cell back film, the procedure of glue coating is reduced, granulation is carried out in a double-screw extruder, the obtained three layers of raw materials are respectively subjected to high-temperature co-extrusion and are superposed according to the structure of the solar cell back plate, a high-temperature roller is adopted for grafting reaction, and then the three layers of laminated solar back plates are obtained through co-extrusion, so that the reject ratio of the back plates caused by improper gluing control is eliminated, and the productivity and the finished product qualification rate of the back plates can be greatly improved.
Detailed Description
The solar cell back film is composed of an outer layer, a middle layer and an inner layer from top to bottom in sequence, wherein the outer layer is a weather-resistant layer, the middle layer is a structure enhancement layer, the inner layer is a modified EVA bonding layer,
the outer layer comprises polyethylene glycol terephthalate, high-density polyethylene, thermoplastic resin, polyamide and acrylic resin, and is composed of the following components in parts by weight:
80-95 parts of polyethylene glycol terephthalate
0 to 15 portions of high-density polyethylene
1-5 parts of thermoplastic resin
2-5 parts of polyamide
1-6 parts of acrylic resin
The middle layer comprises polypropylene, polymethyl methacrylate, engineering plastics, acrylic resin, an antioxidant and polystyrene grafted maleic anhydride, and is composed of the following components in parts by weight:
90-98 parts of polypropylene
0-10 parts of polymethyl methacrylate
2-5 parts of engineering plastic
1-5 parts of acrylic resin
0.1-2 parts of antioxidant
0-5 parts of polystyrene grafted maleic anhydride
The inner layer comprises linear low-density polyethylene, carbon black, an ultraviolet absorbent, a light stabilizer, an antioxidant and acrylic ester, and is composed of the following components in parts by weight:
50-95 parts of linear low-density polyethylene
10-30 parts of carbon black
3-6 parts of ultraviolet absorbent
1-5 parts of light stabilizer
0.1-2 parts of antioxidant
1-5 parts of acrylate.
The thermoplastic resin is polyphenylene sulfide resin or polyethylene resin. The thermoplastic resin has the properties of softening by heating and hardening by cooling, and does not react chemically, and such properties are maintained regardless of the number of times heating and cooling are repeated. Therefore, the process adopts the thermoplastic resin, so that the granulation can be realized firstly, and the granulation particles are dissolved for the second time and then are injected; meanwhile, the powder can be repeatedly crushed and then heated for remodeling, so that recycling is realized.
The acrylate is used as the adhesive to be applied to the outer layer, the middle layer and the inner layer of the solar cell back film, the acrylate can be used as the adhesive under the conditions of high temperature and high humidity, appearance changes such as foaming, supply, peeling and the like can not be generated, the acrylate is added into the back film, glue is not needed to be additionally used for bonding between layers, the process of coating the glue is reduced, the defective rate of the back plate caused by improper gluing control is eliminated, and the productivity and the finished product qualification rate of the back plate can be greatly improved.
The engineering plastic is one or more of polyamide, polytetrafluoroethylene, ABS plastic, polyformaldehyde and polycarbonate.
The materials of the outer layer, the middle layer and the inner layer are put into a high-speed mixer according to the formula and are uniformly mixed, then the materials are put into a double-screw extruder for granulation, the obtained three layers of raw materials are respectively subjected to high-temperature co-extrusion and are superposed according to the structure of the solar cell backboard, a high-temperature roller wheel is adopted for grafting reaction, and then the three layers of laminated solar backboard is obtained through co-extrusion.
Example one
The outer layer comprises polyethylene glycol terephthalate, high-density polyethylene, thermoplastic resin, polyamide and acrylic resin, and is composed of the following components in parts by weight:
85 parts of polyethylene terephthalate
12 portions of high-density polyethylene
Thermoplastic resin 3 parts
Polyamide 2 parts
Acrylic resin 5 parts
The middle layer comprises polypropylene, polymethyl methacrylate, engineering plastics, acrylic resin, an antioxidant and polystyrene grafted maleic anhydride, and is composed of the following components in parts by weight:
95 parts of polypropylene
Polymethyl methacrylate 8 parts
Engineering plastic 3 parts
Acrylic resin 4 parts
0.5 part of antioxidant
Polystyrene grafted maleic anhydride 3 parts
The inner layer comprises linear low-density polyethylene, carbon black, an ultraviolet absorbent, a light stabilizer, an antioxidant and acrylic ester, and is composed of the following components in parts by weight:
linear low density polyethylene 60 parts
Carbon black 25 parts
5 portions of ultraviolet absorbent
Light stabilizer 3 parts
0.5 part of antioxidant
5 parts of acrylic ester.
Putting the outer layer material into a high-speed mixer according to the formula, uniformly mixing, then putting the mixture into a double-screw extruder for granulation, putting the middle layer material into the high-speed mixer according to the formula, uniformly mixing, then putting the mixture into the double-screw extruder for granulation, putting the inner layer material into the high-speed mixer according to the formula, uniformly mixing, then putting the mixture into the double-screw extruder for granulation, respectively carrying out high-temperature co-extrusion on the obtained three layers of raw materials, superposing the three layers of raw materials according to the structure of the solar cell backboard, carrying out grafting reaction by using a high-temperature roller, and then carrying out co-extrusion to obtain the three-layer laminated solar backboard.
Example two
The outer layer comprises polyethylene glycol terephthalate, high-density polyethylene, thermoplastic resin, polyamide and acrylic resin, and is composed of the following components in parts by weight:
90 parts of polyethylene terephthalate
12 portions of high-density polyethylene
Thermoplastic resin 4 parts
Polyamide 3 parts
Acrylic resin 4 parts
The middle layer comprises polypropylene, polymethyl methacrylate, engineering plastics, acrylic resin, an antioxidant and polystyrene grafted maleic anhydride, and is composed of the following components in parts by weight:
92 parts of polypropylene
Polymethyl methacrylate 8 parts
Engineering plastic 3 parts
Acrylic resin 5 parts
1 part of antioxidant
Polystyrene grafted maleic anhydride 2 parts
The inner layer comprises linear low-density polyethylene, carbon black, an ultraviolet absorbent, a light stabilizer, an antioxidant and acrylic ester, and is composed of the following components in parts by weight:
80 parts of linear low-density polyethylene
20 portions of carbon black
5 portions of ultraviolet absorbent
Light stabilizer 3 parts
0.8 portion of antioxidant
5 parts of acrylic ester.
Putting the outer layer material into a high-speed mixer according to the formula, uniformly mixing, then putting the mixture into a double-screw extruder for granulation, putting the middle layer material into the high-speed mixer according to the formula, uniformly mixing, then putting the mixture into the double-screw extruder for granulation, putting the inner layer material into the high-speed mixer according to the formula, uniformly mixing, then putting the mixture into the double-screw extruder for granulation, respectively carrying out high-temperature co-extrusion on the obtained three layers of raw materials, superposing the three layers of raw materials according to the structure of the solar cell backboard, carrying out grafting reaction by using a high-temperature roller, and then carrying out co-extrusion to obtain the three-layer laminated solar backboard.
EXAMPLE III
The outer layer comprises polyethylene glycol terephthalate, high-density polyethylene, thermoplastic resin, polyamide and acrylic resin, and is composed of the following components in parts by weight:
88 parts of polyethylene terephthalate
High density polyethylene 13 parts
Thermoplastic resin 5 parts
Polyamide 2 parts
Acrylic resin 6 parts
The middle layer comprises polypropylene, polymethyl methacrylate, engineering plastics, acrylic resin, an antioxidant and polystyrene grafted maleic anhydride, and is composed of the following components in parts by weight:
92 parts of polypropylene
Polymethyl methacrylate 8 parts
Engineering plastic 3 parts
Acrylic resin 4 parts
1 part of antioxidant
4 parts of polystyrene grafted maleic anhydride
The inner layer comprises linear low-density polyethylene, carbon black, an ultraviolet absorbent, a light stabilizer, an antioxidant and acrylic ester, and is composed of the following components in parts by weight:
78 parts of linear low-density polyethylene
Carbon black 25 parts
5 portions of ultraviolet absorbent
Light stabilizer 4 parts
2 portions of antioxidant
5 parts of acrylic ester.
Putting the outer layer material into a high-speed mixer according to the formula, uniformly mixing, then putting the mixture into a double-screw extruder for granulation, putting the middle layer material into the high-speed mixer according to the formula, uniformly mixing, then putting the mixture into the double-screw extruder for granulation, putting the inner layer material into the high-speed mixer according to the formula, uniformly mixing, then putting the mixture into the double-screw extruder for granulation, respectively carrying out high-temperature co-extrusion on the obtained three layers of raw materials, superposing the three layers of raw materials according to the structure of the solar cell backboard, carrying out grafting reaction by using a high-temperature roller, and then carrying out co-extrusion to obtain the three-layer laminated solar backboard.
Examples performance testing:
Claims (3)
1. a solar cell back film, characterized in that: sequentially consists of an outer layer, a middle layer and an inner layer from top to bottom, wherein the outer layer is a weather-resistant layer, the middle layer is a structure enhancement layer, and the inner layer is a modified EVA bonding layer,
the outer layer comprises polyethylene glycol terephthalate, high-density polyethylene, thermoplastic resin, polyamide and acrylic resin, and is composed of the following components in parts by weight:
80-95 parts of polyethylene glycol terephthalate
0 to 15 portions of high-density polyethylene
1-5 parts of thermoplastic resin
2-5 parts of polyamide
1-6 parts of acrylic resin
The middle layer comprises polypropylene, polymethyl methacrylate, engineering plastics, acrylic resin, an antioxidant and polystyrene grafted maleic anhydride, and is composed of the following components in parts by weight:
90-98 parts of polypropylene
0-10 parts of polymethyl methacrylate
2-5 parts of engineering plastic
1-5 parts of acrylic resin
0.1-2 parts of antioxidant
0-5 parts of polystyrene grafted maleic anhydride
The inner layer comprises linear low-density polyethylene, carbon black, an ultraviolet absorbent, a light stabilizer, an antioxidant and acrylic ester, and is composed of the following components in parts by weight:
50-95 parts of linear low-density polyethylene
10-30 parts of carbon black
3-6 parts of ultraviolet absorbent
1-5 parts of light stabilizer
0.1-2 parts of antioxidant
1-5 parts of acrylate;
the materials of the outer layer, the middle layer and the inner layer are put into a high-speed mixer according to the formula and are uniformly mixed, then the materials are put into a double-screw extruder to be mixed and modified to prepare the raw materials of respective films, and the obtained three layers of raw materials are co-extruded at high temperature and are continuously produced at one time.
2. The solar cell backsheet of claim 1, wherein: the thermoplastic resin is polyphenylene sulfide resin or polyethylene resin.
3. The solar cell backsheet of claim 1, wherein: the engineering plastic is one or more of polyamide, polytetrafluoroethylene, ABS plastic, polyformaldehyde and polycarbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811441823.2A CN109749369B (en) | 2018-11-29 | 2018-11-29 | Solar cell back film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811441823.2A CN109749369B (en) | 2018-11-29 | 2018-11-29 | Solar cell back film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109749369A CN109749369A (en) | 2019-05-14 |
| CN109749369B true CN109749369B (en) | 2021-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811441823.2A Active CN109749369B (en) | 2018-11-29 | 2018-11-29 | Solar cell back film |
Country Status (1)
| Country | Link |
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| CN (1) | CN109749369B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109943040A (en) * | 2019-03-04 | 2019-06-28 | 常州回天新材料有限公司 | Double-layer structure transparent PET backboard and its processing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4960648A (en) * | 1988-04-14 | 1990-10-02 | Idemitsu Petrochemical Company Limited | Laminated materials and laminated articles |
| CN103642416A (en) * | 2013-12-04 | 2014-03-19 | 常州回天新材料有限公司 | PE (polyethylene) composite film prone to be used for repeat processing of solar backboard |
| CN108682707A (en) * | 2018-06-13 | 2018-10-19 | 常州回天新材料有限公司 | A kind of solar photovoltaic battery component transparent back panel for generating electricity on two sides |
-
2018
- 2018-11-29 CN CN201811441823.2A patent/CN109749369B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4960648A (en) * | 1988-04-14 | 1990-10-02 | Idemitsu Petrochemical Company Limited | Laminated materials and laminated articles |
| CN103642416A (en) * | 2013-12-04 | 2014-03-19 | 常州回天新材料有限公司 | PE (polyethylene) composite film prone to be used for repeat processing of solar backboard |
| CN108682707A (en) * | 2018-06-13 | 2018-10-19 | 常州回天新材料有限公司 | A kind of solar photovoltaic battery component transparent back panel for generating electricity on two sides |
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| CN109749369A (en) | 2019-05-14 |
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