CN110117400B - High-toughness PVDF (polyvinylidene fluoride) film material and preparation method thereof, TPT (thermoplastic vulcanizate) back film, TPE (thermoplastic elastomer) back film and solar cell panel - Google Patents

High-toughness PVDF (polyvinylidene fluoride) film material and preparation method thereof, TPT (thermoplastic vulcanizate) back film, TPE (thermoplastic elastomer) back film and solar cell panel Download PDF

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CN110117400B
CN110117400B CN201910299959.2A CN201910299959A CN110117400B CN 110117400 B CN110117400 B CN 110117400B CN 201910299959 A CN201910299959 A CN 201910299959A CN 110117400 B CN110117400 B CN 110117400B
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pvdf
toughness
toughening agent
temperature
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朱圣才
谢海燕
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Wuhan Gaozheng New Material Technology Co ltd
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Abstract

The invention belongs to the technical field of PVDF (polyvinylidene fluoride) films, and particularly relates to a high-toughness PVDF film material, a preparation method thereof, a TPT (thermoplastic vulcanizate) back film, a TPE (thermoplastic elastomer) back film and a solar cell panel. The high-toughness PVDF film material comprises the following components in percentage by weight: 60-70% of PVDF, 5-20% of PMMA, 10-20% of titanium dioxide, 0-10% of a toughening agent, 0-0.5% of an antioxidant and 0-0.5% of an ultraviolet absorbent, wherein the toughening agent is a polymer with the glass transition temperature less than or equal to T, and the temperature T is more than or equal to 0 ℃ and less than or equal to 25 ℃. The invention ensures that the PVDF film still has certain toughness at normal temperature or low temperature through the increase of the toughening agent with the vitrification temperature less than or equal to the normal temperature, thereby reducing the degree of expansion with heat and contraction with cold of the material at the normal temperature. The material has toughness suitable for temperature change, and is suitable for environment with great day-night temperature difference, especially desert environment with great day-night temperature difference.

Description

High-toughness PVDF (polyvinylidene fluoride) film material and preparation method thereof, TPT (thermoplastic vulcanizate) back film, TPE (thermoplastic elastomer) back film and solar cell panel
Technical Field
The invention belongs to the technical field of PVDF (polyvinylidene fluoride) films, and particularly relates to a high-toughness PVDF film material, a preparation method thereof, a TPT (thermoplastic vulcanizate) back film, a TPE (thermoplastic elastomer) back film and a solar cell panel.
Background
The solar cell back film is positioned on the back of the solar cell panel, and is used as a photovoltaic packaging material which is directly contacted with the external environment in a large area, so that the solar cell back film not only has a protection function, but also has reliable insulation performance for 25 years, long-term aging resistance (damp heat, dry heat and ultraviolet), water vapor barrier performance and the like. The solar cell back film, the EVA adhesive film, the crystalline silicon cell piece, the glass, the frame and the junction box are assembled into the crystalline silicon solar cell panel. The back film can be divided into a composite film type back plate and a coating type back plate according to the manufacturing process. The composite film type back plate is prepared by compounding PVF, PVDF or ETFE and other fluorine films with a PET base film through an adhesive. The process is the main production process of the prior back film product. Market share dominates. From a material structure perspective, the back film is mainly of the TPT, TPE and PPE structures, and the like, wherein the TPT and TPE structures are the most common, and the two structures account for about 90% of the market share. TPT is a double-sided film structure (fluorine film + PET + fluorine film), TPE is a single-sided fluorine film structure (fluorine film + PET + PE), and PE is mainly used for replacing an inner-layer fluorine film. The GZF-120 type PVDF film which is independently developed and produced by a company is used for a fluorine film layer in TPT and TPE structures.
2013 and 2018 global photovoltaic newly increases the total demand of 35-55GW every year, corresponds to the demand of 2.6-4 hundred million square meters of solar cell back panels, and averagely increases at the speed of about 20% every year. Due to the complicated application environment of the photovoltaic module, the photovoltaic module has higher and higher requirements on the back film of the solar cell, so that the requirements on the fluorine films on two sides of the back film are higher and higher. The assembly of solar cell modules in deserts is an example, and the solar cell modules are more and more widely applied in deserts. However, the day and night temperature difference of the desert environment is large, so that the solar photovoltaic back film used in the ordinary mountainous region and the flat ground cannot well meet the requirements of the desert solar photovoltaic module. The development of high toughness PVDF films is a new market demand for corporate PVDF films.
The expansion with heat and contraction with cold is the performance of the material along with the temperature change, and the environment with large temperature difference between day and night requires the material to have corresponding toughness to adapt to the temperature change. The rigid material cannot change along with the temperature change, and is easy to crack over time. The cutting lines on roads and bridges are a solution to the problem of expansion with heat and contraction with cold. The solar photovoltaic back panel film cannot use the cutting line so as to solve the problem from the material perspective.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a high-toughness PVDF film material. The high-toughness PVDF film material provided by the invention has proper toughness, has a function of changing along with temperature, and can adapt to temperature change in an environment with large day-night temperature difference, thereby effectively avoiding cracking.
The technical scheme provided by the invention is as follows:
a high-toughness PVDF film material comprises the following components in percentage by weight: 60-70% of PVDF, 5-20% of PMMA, 10-20% of titanium dioxide, 0-10% of toughening agent (excluding 0%), 0-0.5% of antioxidant and 0-0.5% of ultraviolet absorbent, wherein the toughening agent is a polymer with the glass transition temperature less than or equal to T, and the temperature T is more than or equal to 0 ℃ and less than or equal to 25 ℃.
Based on the technical scheme, the toughening agent with the vitrification temperature less than or equal to the normal temperature is added, so that the PVDF film still has good toughness at the normal temperature or low temperature, and the degree of expansion with heat and contraction with cold of the material at the normal temperature or low temperature is reduced. The material can be suitable for environments with large day-night temperature difference due to the toughness of the material adapting to temperature change, and particularly can be suitable for the conditions similar to desert environments with large day-night temperature difference.
Specifically, the toughening agent is a homopolymer or a copolymer.
Specifically, the toughening agent is selected from any one of Chlorinated Polyethylene (CPE), acrylic resin (ACR), methacrylic acid-butadiene-styrene copolymer (MBS), ethylene-vinyl acetate copolymer (EVA), nitrile rubber or styrene-butadiene-styrene block copolymer (SBS).
The toughening agents provided by the technical scheme can improve the normal-temperature or low-temperature toughness of the PVDF film material under the condition of not influencing various performances of the PVDF film.
Preferably, the toughening agent is styrene-butadiene-styrene block copolymer (SBS), methacrylic acid-butadiene-styrene copolymer (MBS), or acrylic resin (ACR).
The toughening agents provided by the technical scheme can obviously improve the normal-temperature or low-temperature toughness of the PVDF film material under the condition of not influencing various performances of the PVDF film.
The invention also provides a preparation method of the high-toughness PVDF film material, which comprises the following steps: the components are mixed and melted to obtain the high-toughness PVDF film material.
Specifically, the high-toughness PVDF film material can be prepared into a master batch, and the specific steps are as follows:
1) milling PMMA into powder, and specifically milling and refining PMMA powder by using a mill;
2) stirring and mixing PMMA powder with PVDF, a toughening agent, titanium dioxide, an antioxidant and an ultraviolet absorbent to obtain mixed powder, and specifically, stirring and mixing by adopting a mixer;
3) heating and melting the mixed powder at 180-230 ℃, specifically, heating and melting by adopting a granulator;
4) drawing the molten material into strips or wires and cutting the molten material into particles, wherein a particle cutting machine can be adopted;
5) sieving the material particles to obtain high-toughness PVDF film material master batches, and packaging the master batches into a product, wherein the material particles can be cut into granules by a granulator.
The preparation method is simple and low in cost, and the obtained high-toughness PVDF film material is stable in performance and suitable for industrial production.
The invention also provides a TPT back film which comprises a first fluorine film, a PET film attached to the first fluorine film and a second fluorine film attached to the PET film, wherein the material of the first fluorine film and/or the second fluorine film is selected from the high-toughness PVDF film materials provided by the invention.
The TPT back film provided by the technical scheme has good toughness at normal temperature or low temperature due to the high-toughness PVDF film provided by the invention, so that the expansion and contraction degree of the TPT back film at normal temperature or low temperature is reduced. The TPT back film can be suitable for environments with large day-night temperature difference due to the toughness of the TPT back film, and particularly can be suitable for the conditions of large day-night temperature difference similar to desert environments.
The invention also provides a TPE back film which comprises a fluorine film, a PET film attached to the fluorine film and a PE film attached to the PET film, wherein the material of the fluorine film is selected from the high-toughness PVDF film materials provided by the invention.
The TPE back film provided by the technical scheme has good toughness at normal temperature or low temperature due to the high-toughness PVDF film provided by the invention, so that the degree of expansion with heat and contraction with cold of the TPT back film at normal temperature or low temperature is reduced. This TPE notacoria can be applicable to the environment that the difference in temperature is big round the clock because of its toughness that adapts to the temperature variation, especially can be applicable to the great condition of the difference in temperature round the clock of similar desert environment.
The invention also provides a solar cell panel which is provided with the back film, wherein the back film is the TPT back film provided by the invention, or the TPE back film provided by the invention.
The fluorine film in the TPT back film and the TPE back film is a high-toughness PVDF film material back plate film and can be prepared from high-toughness PVDF film material master batches, and the specific steps are as follows:
1) heating and extruding the master batch of the high-toughness PVDF film material to obtain molten resin, and specifically, heating and extruding the molten resin by using a casting machine for a second time;
2) molding and cooling the molten resin through a rubber roller to obtain a back plate film;
3) the method comprises the steps of detecting thickness, a high-voltage motor, trimming and rewinding of a back plate film to obtain a finished back plate film, and packaging the back plate film into a product.
The back film of the solar cell panel provided by the technical scheme has good toughness at normal temperature or low temperature due to the high-toughness PVDF film provided by the invention, so that the expansion and contraction degree of the whole solar cell panel at normal temperature or low temperature is reduced. The solar cell panel can be suitable for environments with large day-night temperature difference due to the toughness of the solar cell panel, and is particularly suitable for the conditions of large day-night temperature difference similar to desert environments.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
Example 1
The high-toughness PVDF film material comprises the following components in percentage by weight: PVDF 60%, PMMA 20%, titanium dioxide 14%, flexibilizer 5%, antioxidant 0.5%, and ultraviolet absorber 0.5%.
PVDF is JHG-600 produced by Zhejiang Kyoho Co.
PMMA is Qimei CM-207 in Taiwan.
Titanium dioxide is U.S. DuPont R104.
The toughening agent is selected from styrene-butadiene-styrene block copolymer (SBS).
The antioxidant is antioxidant 1010.
The ultraviolet absorber is UV 326.
The components are mixed and melted, and the high-toughness PVDF film material film is prepared.
The prepared high-toughness PVDF film material film is tested according to the tensile property test method of GB 13022-1991, and the result is as follows: and performing cold-hot circulation at the temperature of between 40 ℃ below zero and 85 ℃ for 1000 times, treating the film for 6 hours each time, and after the film is subjected to cold-hot circulation for 1000 times, the film does not crack and the elongation at break is more than 110 percent.
Example 2
The high-toughness PVDF film material comprises the following components in percentage by weight: PVDF 70%, PMMA 13%, titanium dioxide 10%, toughening agent 6%, antioxidant 0.5% and ultraviolet absorbent 0.5%.
PVDF is JHG-600 produced by Zhejiang Kyoho Co.
PMMA is Qimei CM-207 in Taiwan.
Titanium dioxide is U.S. DuPont R104.
The toughening agent is selected from methacrylic acid-butadiene-styrene copolymer.
The antioxidant is antioxidant 1010.
The ultraviolet absorber is UV 326.
The components are mixed and melted, and the high-toughness PVDF film material film is prepared.
The prepared high-toughness PVDF film material film is tested according to the tensile property test method of GB 13022-1991, and the result is as follows: and performing cold-hot circulation at the temperature of between 40 ℃ below zero and 85 ℃ for 1000 times, treating the film for 6 hours each time, and after the film is subjected to cold-hot circulation for 1000 times, the film does not crack and the elongation at break is more than 130%.
Example 3
The high-toughness PVDF film material comprises the following components in percentage by weight: PVDF 62%, PMMA 20%, titanium dioxide 10%, toughening agent 7%, antioxidant 0.5% and ultraviolet absorbent 0.5%.
PVDF is JHG-600 produced by Zhejiang Kyoho Co.
PMMA is Qimei CM-207 in Taiwan.
Titanium dioxide is U.S. DuPont R104.
The toughening agent is acrylic resin.
The antioxidant is antioxidant 1010.
The ultraviolet absorber is UV 326.
The components are mixed and melted, and the high-toughness PVDF film material film is prepared.
The prepared high-toughness PVDF film material film is tested according to the tensile property test method of GB 13022-1991, and the result is as follows: and performing cold-hot circulation at the temperature of between 40 ℃ below zero and 85 ℃ for 1000 times, treating the film for 6 hours each time, and after the film is subjected to cold-hot circulation for 1000 times, the film does not crack and the elongation at break is more than 200%.
Example 4
The high-toughness PVDF film material comprises the following components in percentage by weight: PVDF 65%, PMMA 20%, titanium dioxide 10% and toughening agent 5%.
PVDF is JHG-600 produced by Zhejiang Kyoho Co.
PMMA is Qimei CM-207 in Taiwan.
Titanium dioxide is U.S. DuPont R104.
The toughening agent is acrylic resin.
The components are mixed and melted, and the high-toughness PVDF film material film is prepared.
The prepared high-toughness PVDF film material film is tested according to the tensile property test method of GB 13022-1991, and the result is as follows: and performing cold-hot circulation at the temperature of between 40 ℃ below zero and 85 ℃ for 1000 times, treating the film for 6 hours each time, and after the film is subjected to cold-hot circulation for 1000 times, the film does not crack and the elongation at break is more than 120 percent.
Example 5
The high-toughness PVDF film material comprises the following components in percentage by weight: 70% of PVDF, 10% of PMMA, 10% of titanium dioxide, 9.65% of flexibilizer, 0.25% of antioxidant and 0.1% of ultraviolet absorber.
PVDF is JHG-600 produced by Zhejiang Kyoho Co.
PMMA is Qimei CM-207 in Taiwan.
Titanium dioxide is U.S. DuPont R104.
The toughening agent is selected from styrene-butadiene-styrene block copolymer.
The antioxidant is antioxidant 1010.
The ultraviolet absorber is UV 326.
The components are mixed and melted, and the high-toughness PVDF film material film is prepared.
The prepared high-toughness PVDF film material film is tested according to the tensile property test method of GB 13022-1991, and the result is as follows: and performing cold-hot circulation at the temperature of between 40 ℃ below zero and 85 ℃ for 1000 times, treating the film for 6 hours each time, and after the film is subjected to cold-hot circulation for 1000 times, the film does not crack and the elongation at break is more than 240 percent.
Example 6
The high-toughness PVDF film material comprises the following components in percentage by weight: 60% of PVDF, 20% of PMMA, 15% of titanium dioxide, 4.25% of flexibilizer, 0.5% of antioxidant and 0.25% of ultraviolet absorber.
PVDF is JHG-600 produced by Zhejiang Kyoho Co.
PMMA is Qimei CM-207 in Taiwan.
Titanium dioxide is U.S. DuPont R104.
The toughening agent is methacrylic acid-butadiene-styrene copolymer.
The antioxidant is antioxidant 1010.
The ultraviolet absorber is UV 326.
The components are mixed and melted, and the high-toughness PVDF film material film is prepared.
The prepared high-toughness PVDF film material film is tested according to the tensile property test method of GB 13022-1991, and the result is as follows: and performing cold-hot circulation at the temperature of between 40 ℃ below zero and 85 ℃ for 1000 times, treating the film for 6 hours each time, and after the film is subjected to cold-hot circulation for 1000 times, the film does not crack and the elongation at break is more than 100 percent.
Example 7
The high-toughness PVDF film material comprises the following components in percentage by weight: 65% of PVDF, 5% of PMMA, 20% of titanium dioxide, 9.4% of a toughening agent, 0.1% of an antioxidant and 0.5% of an ultraviolet absorbent.
PVDF is JHG-600 produced by Zhejiang Kyoho Co.
PMMA is Qimei CM-207 in Taiwan.
Titanium dioxide is U.S. DuPont R104.
The toughening agent is acrylic resin.
The antioxidant is antioxidant 1010.
The ultraviolet absorber is UV 326.
The components are mixed and melted, and the high-toughness PVDF film material film is prepared.
The prepared high-toughness PVDF film material film is tested according to the tensile property test method of GB 13022-1991, and the result is as follows: and performing cold-hot circulation at the temperature of between 40 ℃ below zero and 85 ℃ for 1000 times, treating the film for 6 hours each time, and after the film is subjected to cold-hot circulation for 1000 times, the film does not crack and the elongation at break is more than 220%.
Comparative example 1
The high-toughness PVDF film material comprises the following components in percentage by weight: PVDF 69%, PMMA 20%, titanium dioxide 10%, antioxidant 0.5% and ultraviolet absorbent 0.5%.
PVDF is JHG-600 produced by Zhejiang Kyoho Co.
PMMA is Qimei CM-207 in Taiwan.
Titanium dioxide is U.S. DuPont R104.
The antioxidant is antioxidant 1010.
The ultraviolet absorber is UV 326.
The components are mixed and melted, and the high-toughness PVDF film material film is prepared.
The prepared high-toughness PVDF film material film is tested according to the tensile property test method of GB 13022-1991, and the result is as follows: and performing cold-hot circulation at the temperature of between 40 ℃ below zero and 85 ℃ for 1000 times, treating the film for 6 hours each time, and after the film is subjected to cold-hot circulation for 1000 times, the film is not cracked and the elongation at break is more than 50 percent. As can be seen from the comparative example 1, the toughness of the PVDF film material is obviously improved by adding the disclosed toughening agent.
Comparative example 2
The high-toughness PVDF film material comprises the following components in percentage by weight: PVDF 55%, PMMA 25%, titanium dioxide 14%, flexibilizer 5%, antioxidant 0.5%, and ultraviolet absorber 0.5%.
PVDF is JHG-600 produced by Zhejiang Kyoho Co.
PMMA is Qimei CM-207 in Taiwan.
Titanium dioxide is U.S. DuPont R104.
The toughening agent is selected from styrene-butadiene-styrene block copolymer (SBS).
The antioxidant is antioxidant 1010.
The ultraviolet absorber is UV 326.
The components are mixed and melted, and the high-toughness PVDF film material film is prepared.
The prepared high-toughness PVDF film material film is tested according to the tensile property test method of GB 13022-1991, and the result is as follows: and performing cold-hot circulation at the temperature of between 40 ℃ below zero and 85 ℃ for 1000 times, treating the film for 6 hours each time, and after the film is subjected to cold-hot circulation for 1000 times, the film is not cracked and the elongation at break is more than 50 percent.
Comparative example 3
The high-toughness PVDF film material comprises the following components in percentage by weight: PVDF 55%, PMMA 15%, titanium dioxide 14%, toughening agent 15%, antioxidant 0.5% and ultraviolet absorbent 0.5%.
PVDF is JHG-600 produced by Zhejiang Kyoho Co.
PMMA is Qimei CM-207 in Taiwan.
Titanium dioxide is U.S. DuPont R104.
The toughening agent is selected from styrene-butadiene-styrene block copolymer (SBS).
The antioxidant is antioxidant 1010.
The ultraviolet absorber is UV 326.
The components are mixed and melted, and the high-toughness PVDF film material film is prepared.
The prepared high-toughness PVDF film material film is tested according to the tensile property test method of GB 13022-1991, and the result is as follows: and performing cold-hot circulation at the temperature of between 40 ℃ below zero and 85 ℃ for 1000 times, treating the film for 6 hours each time, and after the film is subjected to cold-hot circulation for 1000 times, the film does not crack and the elongation at break is more than 120 percent.
Comparative example 4
The high-toughness PVDF film material comprises the following components in percentage by weight: PVDF 72%, PMMA 3%, titanium dioxide 14%, toughening agent 5%, antioxidant 0.5%, and ultraviolet absorbent 0.5%.
PVDF is JHG-600 produced by Zhejiang Kyoho Co.
PMMA is Qimei CM-207 in Taiwan.
Titanium dioxide is U.S. DuPont R104.
The toughening agent is selected from styrene-butadiene-styrene block copolymer.
The antioxidant is antioxidant 1010.
The ultraviolet absorber is UV 326.
The components are mixed and melted, and the high-toughness PVDF film material film is prepared.
The prepared high-toughness PVDF film material film is tested according to the tensile property test method of GB 13022-1991, and the result is as follows: and performing cold-hot circulation at the temperature of between 40 ℃ below zero and 85 ℃ for 1000 times, treating the film for 6 hours each time, and after the film is subjected to cold-hot circulation for 1000 times, the film does not crack and the elongation at break is more than 70 percent.
Comparative example 5
The high-toughness PVDF film material comprises the following components in percentage by weight: PVDF 72%, PMMA 13%, titanium dioxide 4%, flexibilizer 5%, antioxidant 0.5%, and ultraviolet absorber 0.5%.
PVDF is JHG-600 produced by Zhejiang Kyoho Co.
PMMA is Qimei CM-207 in Taiwan.
Titanium dioxide is U.S. DuPont R104.
The toughening agent is selected from styrene-butadiene-styrene block copolymer.
The antioxidant is antioxidant 1010.
The ultraviolet absorber is UV 326.
The components are mixed and melted, and the high-toughness PVDF film material film is prepared.
The prepared high-toughness PVDF film material film is tested according to the tensile property test method of GB 13022-1991, and the result is as follows: and performing cold-hot circulation at the temperature of between 40 ℃ below zero and 85 ℃ for 1000 times, treating the film for 6 hours each time, and after the film is subjected to cold-hot circulation for 1000 times, the film is not cracked and the elongation at break is more than 60 percent.
As can be seen from comparative examples 2, 3, 4 and 5, the toughness of the PVDF film material can be remarkably improved by adding the toughening agent disclosed by the invention under the proportioning conditions of 60-70% of PVDF and 5-20% of PMMA.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (8)

1. A high-toughness PVDF film material for a solar back film is characterized by comprising the following components in percentage by weight: 60-70% of PVDF, 5-20% of PMMA, 10-20% of titanium dioxide, 0-10% of a toughening agent, 0-0.5% of an antioxidant and 0-0.5% of an ultraviolet absorbent, wherein the toughening agent is a polymer with the glass transition temperature less than or equal to T, T is more than or equal to 0 ℃ and less than or equal to 25 ℃, and the content of the toughening agent is not 0.
2. The high toughness PVDF film material for solar back film as claimed in claim 1, wherein: the toughening agent is a homopolymer or a copolymer.
3. The high toughness PVDF film material for solar back film as claimed in claim 1 or 2, wherein: the toughening agent is selected from any one of chlorinated polyethylene, acrylic resin, methacrylic acid-butadiene-styrene copolymer, ethylene-vinyl acetate copolymer, nitrile rubber or styrene-butadiene-styrene block copolymer.
4. The high toughness PVDF film material for solar back film as claimed in claim 1 or 2, wherein: the toughening agent is any one of styrene-butadiene-styrene block copolymer, methacrylic acid-butadiene-styrene copolymer or acrylic resin.
5. A preparation method of the high-toughness PVDF film material for the solar back film as claimed in any one of claims 1 to 4, characterized by comprising the following steps: the components are mixed and melted to obtain the high-toughness PVDF film material.
6. A TPT backsheet comprising a first fluorine film, a PET film attached to the first fluorine film, and a second fluorine film attached to the PET film, characterized in that: the material of the first fluorine film and/or the second fluorine film is selected from the high-toughness PVDF film material for the solar back film, which is/are set forth in any one of claims 1 to 4.
7. A TPE notacoria, including fluorine membrane, adhere to PET membrane on the fluorine membrane and adhere to PE membrane on the PET membrane, its characterized in that: the material of the fluorine film is selected from the high-toughness PVDF film material for the solar back film as claimed in any one of claims 1 to 4.
8. A solar cell panel, the solar cell panel has notacoria, its characterized in that: the backsheet is the TPT backsheet of claim 6 or the TPE backsheet of claim 7.
CN201910299959.2A 2019-04-15 2019-04-15 High-toughness PVDF (polyvinylidene fluoride) film material and preparation method thereof, TPT (thermoplastic vulcanizate) back film, TPE (thermoplastic elastomer) back film and solar cell panel Active CN110117400B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007085769A3 (en) * 2006-01-25 2007-09-13 Arkema France Flexible film based on fluorinated polymer
CN104327433A (en) * 2013-10-30 2015-02-04 东莞市长安东阳光铝业研发有限公司 Preparation method of polyvinylidene fluoride-based thin film
CN106159010A (en) * 2015-04-13 2016-11-23 江苏昊华光伏科技有限公司 High tensile PVDF solar energy backboard membrane

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007085769A3 (en) * 2006-01-25 2007-09-13 Arkema France Flexible film based on fluorinated polymer
CN104327433A (en) * 2013-10-30 2015-02-04 东莞市长安东阳光铝业研发有限公司 Preparation method of polyvinylidene fluoride-based thin film
CN106159010A (en) * 2015-04-13 2016-11-23 江苏昊华光伏科技有限公司 High tensile PVDF solar energy backboard membrane

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