CN110832138A - Composite packaging material for photovoltaic module and preparation method of composite packaging material - Google Patents
Composite packaging material for photovoltaic module and preparation method of composite packaging material Download PDFInfo
- Publication number
- CN110832138A CN110832138A CN201780092920.2A CN201780092920A CN110832138A CN 110832138 A CN110832138 A CN 110832138A CN 201780092920 A CN201780092920 A CN 201780092920A CN 110832138 A CN110832138 A CN 110832138A
- Authority
- CN
- China
- Prior art keywords
- powder coating
- acrylic resin
- polyester resin
- curing agent
- photovoltaic module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- 238000002360 preparation method Methods 0.000 title abstract description 14
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- 239000011248 coating agent Substances 0.000 claims abstract description 163
- 239000000843 powder Substances 0.000 claims abstract description 151
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 149
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 149
- 239000004645 polyester resin Substances 0.000 claims abstract description 137
- 229920001225 polyester resin Polymers 0.000 claims abstract description 137
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- 239000000835 fiber Substances 0.000 claims abstract description 79
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- 238000002844 melting Methods 0.000 claims 2
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- RUMACXVDVNRZJZ-UHFFFAOYSA-N 2-methylpropyl 2-methylprop-2-enoate Chemical compound CC(C)COC(=O)C(C)=C RUMACXVDVNRZJZ-UHFFFAOYSA-N 0.000 description 2
- CFVWNXQPGQOHRJ-UHFFFAOYSA-N 2-methylpropyl prop-2-enoate Chemical compound CC(C)COC(=O)C=C CFVWNXQPGQOHRJ-UHFFFAOYSA-N 0.000 description 2
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
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Abstract
The invention discloses a composite packaging material for a photovoltaic module, which comprises the following raw materials: the fiber cloth is made of fiber materials in a weaving mode; the raw materials of the mixed thermosetting powder coating comprise acrylic resin, an acrylic resin curing agent, polyester resin and a polyester resin curing agent; wherein, the mixed thermosetting powder coating is uniformly coated on the fiber cloth; the invention can effectively ensure the service life of the photovoltaic module in severe installation environments, such as high-temperature and high-humidity environment, outdoor strong ultraviolet illumination or strong wind environment, environment with high mechanical installation requirement and the like; the invention also discloses a preparation method of the composite packaging material for the photovoltaic module, which realizes the random change of the packaging size of the photovoltaic module to adapt to the mounting requirements of different buildings and is further convenient for the mounting and application of the photovoltaic module.
Description
Composite packaging material for photovoltaic module and preparation method of composite packaging material
[0001] The invention belongs to the field of photovoltaics, particularly relates to a composite packaging material for a photovoltaic module, and further relates to a preparation method of the composite packaging material.
Background
[0002] In the current society, energy contradiction and environmental problems are more and more prominent, and the development of various clean energy sources is a necessary trend. In recent years, the photovoltaic industry is rapidly developed, technology updating is gradually accelerated, the photovoltaic industry is developing towards product diversification, and research and development of various functional components with high reliability, high power and low installation cost become a direction for photovoltaic component development.
[0003] Solar photovoltaic power generation relies on solar cells to convert light energy directly into electrical energy. In the past decade, the global total production of photovoltaic cells has increased with an annual growth rate averaging over 40%, and the installed capacity of global photovoltaic power generation systems has reached 100GW by the end of 2012. Photovoltaic power generation is expected to account for 10% of the world's energy supply in 2030, making a substantial contribution to the world's energy supply and energy structure.
[0004] As an encapsulating material applied in the photovoltaic field, the encapsulating material is required to have ultraviolet resistance, aging resistance, and the like, as shown in fig. 3, the existing typical encapsulating structure of a photovoltaic module sequentially includes from top to bottom: toughened glass layer 30c, last EV A layer 21c, photovoltaic cell sheet layer 10c, lower EVA layer 22c, backsheet layer 40c, wherein: the density of toughened glass layer reaches 2.5 g/cm 3, and toughened glass's common thickness is 3.2mm, therefore toughened glass every square meter weight reaches 8Kg, the photovoltaic module by its encapsulation completion is great by the general quality, its weight reaches lOKg above per square meter, including installation bearing structure, photovoltaic module's weight reaches more than 12Kg at least per square meter, when it uses in occasions such as building top or wall, put forward higher requirement to photovoltaic module's bearing structure, the engineering construction degree of difficulty and the cost of installation have been increased, the concrete expression is: in the process of installing the top or the wall of a building, the weight is heavy, the labor intensity of installation is high, and the implementation is difficult; particularly, in some occasions, due to the limit of the load bearing of the building, the photovoltaic module cannot be installed. And the existing photovoltaic module packaging structure has the defects of single appearance, difficult change to adapt to the requirements of different building attractions and the like.
[0005] At present, some technical schemes provide that the problem of light weight of the photovoltaic module is attempted to be solved by changing the packaging material, namely, toughened glass is replaced by the high-light-transmission film and the transparent back plate, but in the practical application process, because most of the high-light-transmission film and the transparent back plate only adopt adhesive films such as EVA (ethylene vinyl acetate), POE (polyolefin elastomer) and the like, the photovoltaic module packaged like this cannot meet the technical standards of the photovoltaic industry in the performances of impact resistance, fire resistance and the like.
[0006] Also some technical scheme publicity is used for reducing photovoltaic module's weight, like chinese invention patent publicity with public second issue CN102516852A has developed a resistant time, high heat conduction coating and heat dissipation solar energy backplate, but its coating needs to use a large amount of solvents in the production process, and is very big to environmental pollution, does not accord with green environmental protection standard. Also for example, the China invention patent with the public government number CN102610680A discloses a solar cell back plate with a UV-curing weather-resistant coating, but the adopted liquid coating process is complex, the reject ratio is high, and the equipment investment is large. And like a series of Chinese invention patents with public dispersivity numbers of CN102712184A, CN103346182A, CN102969382B, CN101290950B, CN103958196A and the like, fluorine-containing polymers are adopted, but the fluorine-containing polymers are expensive, the production cost is increased, and in addition, the disclosed material for the photovoltaic back plate is only a material for the photovoltaic back plate, is light-proof, low in hardness and weak in rigidity, and is not suitable for replacing the existing toughened glass. Therefore, a need exists for a photovoltaic module packaging material to solve the problem of heavy weight of the packaging material existing in the existing photovoltaic module packaging structure, and meet the requirements of the photovoltaic industry technical standards of ultraviolet resistance, aging resistance, impact resistance, fire resistance and the like.
Technical problem
[0007] In view of the above, the present invention aims to provide a composite encapsulating material for a photovoltaic module, which not only has low manufacturing cost, but also effectively realizes the light weight of the encapsulating material for the photovoltaic module, improves the installation convenience, reduces the installation cost, and is very suitable for large-scale popularization and application in the photovoltaic field on the premise of meeting the requirements of the photovoltaic industry technical standards such as ultraviolet resistance, aging resistance, impact resistance, fire resistance, and the like.
[0008] The invention also aims to provide the preparation method of the composite packaging material for the photovoltaic module, which realizes the random change of the packaging size of the photovoltaic module to adapt to the mounting requirements of different buildings and is further convenient for the mounting and application of the photovoltaic module.
[0009] Before the technical scheme of the invention is introduced, the closest prior art to the present application needs to be explained, the applicant proposes patent inventions of prior application numbers CN201610685536.0 and CN201610685240.9, which respectively disclose the encapsulating materials for photovoltaic modules made of acrylic powder coating and super-weatherable polyester powder coating, and with the popularization and application of the applicant, the encapsulating materials for photovoltaic modules made of acrylic powder coating have high cost, poor stability under high-temperature and high-humidity environment, and insufficient excellent mechanical performance requiring inches for high mechanical installation of photovoltaic modules, which may shorten the service life of the photovoltaic modules; the packaging material for the photovoltaic module, which is prepared from the super-weather-resistant polyester powder coating, has poor weather resistance in severe inches of outdoor installation environment, and has poor mechanical performance in high mechanical installation requirements on the photovoltaic module, so that the service life of the photovoltaic module can be shortened.
[0010] Based on the application conditions, the application hopes to find the packaging material for the photovoltaic module with more excellent performance
The service life of the photovoltaic module in severe installation environments including high-temperature and high-humidity environments, outdoor strong ultraviolet illumination or strong wind environments, environments with high mechanical installation requirements and the like can be effectively ensured. The applicant has surprisingly found that when a powder coating obtained by mixing an acrylic powder coating with a polyester powder coating is applied to a fibrous cloth, a potting material with significantly improved properties is obtained.
Solution to the problem
Technical solution
[0011] Therefore, the technical scheme adopted by the invention is as follows:
[0012] a composite encapsulating material for a photovoltaic module comprises the following raw materials:
[0013] the fiber cloth is made of fiber materials in a weaving mode;
[0014] the mixed thermosetting powder paint consists of acrylic resin as material
Acrylic resin curing agents, polyester resins and polyester resin curing agents;
[0015] wherein, the mixed type thermosetting powder coating is uniformly coated on the fiber cloth.
[0016] Preferably, the weight of the fiber cloth is 30-400g/m 2, and the weight of the mixed thermosetting powder coating coated on the fiber cloth is 100-400 g/m 2.
[0017] Preferably, the fiber material is any one or combination of several of glass fiber, carbon fiber and aramid fiber; more preferably, the fibrous material is glass fiber.
[0018] Preferably, the monofilament diameter of said fibrous material is in the range of 3 to 23 μ η iota.
[0019] Preferably, the fiber cloth is made of fiber materials by any one of or a combination of several weaving modes of plain weave, twill weave, satin weave, rib weave or mat weave; more preferably, the fiber cloth is made of fiber materials by adopting twill.
[0020] Preferably, the weight part ratio range of the fiber cloth and the mixed type thermosetting powder coating is 20
-60 parts: 40-80 parts; more preferably, the weight ratio of the fiber cloth to the mixed thermosetting powder coating ranges from 30 to 50 parts: 50-70 parts.
[0021] Preferably, the weight per unit area of the fiber cloth ranges from 30 to 400g/m 2, and the weight per unit area of the mixed type thermosetting powder coating coated on the fiber cloth ranges from 100 to 400g/m 2.
[0022] Preferably, in the hybrid thermosetting powder coating, the ratio of parts by weight of the acrylic resin to the polyester resin is in the range of 30-70 parts: 70-30 parts.
[0023] Preferably, in the hybrid thermosetting powder coating, the ratio of parts by weight of the acrylic resin to the polyester resin ranges from 40 to 60 parts: 60-40 parts.
[0024] Preferably, the mixed thermosetting powder coating has a gel time range of 50-1000s, a sloping plate flow range of 10-40cm and a softening point temperature range of 80-120 ℃.
[0025] Preferably, the mixed thermosetting powder coating is prepared by adopting raw materials comprising acrylic resin, acrylic resin curing agent ij, polyester resin and polyester resin curing agent through a melt mixing process.
[0026] Preferably, the mixed thermosetting powder coating is prepared by adopting an acrylic powder coating and a polyester powder coating through a melt mixing process, wherein the acrylic powder coating is prepared by adopting raw materials comprising acrylic resin and an acrylic resin curing agent through a melt mixing process; the polyester powder coating is prepared by adopting raw materials comprising polyester resin and a polyester resin curing agent through a melt mixing process.
[0027] Preferably, the mixed thermosetting powder coating is prepared by adopting an acrylic powder coating and a polyester powder coating through a dry mixing process, wherein the acrylic powder coating is prepared by adopting raw materials comprising acrylic resin and an acrylic resin curing agent through a melt mixing process; the polyester powder coating is prepared by adopting raw materials comprising polyester resin and polyester resin curing agent through a melt mixing process
[0028] Preferably, the mixed thermosetting powder coating is prepared by adopting acrylic powder coating, polyester resin and polyester resin curing agent through a melt mixing process, wherein the acrylic powder coating is prepared by adopting raw materials comprising acrylic resin and acrylic resin curing agent through a melt mixing process
[0029] Preferably, the hybrid thermosetting powder coating is prepared by adopting acrylic resin, an acrylic resin curing agent and a polyester powder coating through a melt mixing process, wherein the polyester powder coating is prepared by adopting raw materials comprising polyester resin and a polyester curing agent through a melt mixing process.
[0030] Preferably, the acrylic resin curing agent is different from the polyester resin.
[0031] Preferably, the polyester resin curing agent is different from the acrylic resin. [0032] Preferably, the acrylic resin curing agent is any one or a mixture of several of carboxyl polyester resin, hydroxyl polyester resin, triglycidyl isocyanurate, triglycidyl trimellitate, diglycidyl terephthalate, hydroxyalkylamide, isocyanate, blocked polyisocyanate, uretdione, phthalic anhydride, trimellitic anhydride, sebacic acid, undecanedioic acid, dodecanedioic acid, tridecanedioic acid, tetradecanedioic acid, pentadecanedioic acid, hexadecanedioic acid, dicyandiamide, hydrogen sebacate dihydrazide, diaminodiphenyl sulfone, tetramethylglycoluril, amino resin and hydrogenated epoxy in any ratio.
[0033] Preferably, the polyester resin curing agent is one or a mixture of more of GMA acrylic resin, triglycidyl isocyanurate, triglycidyl trimellitate, diglycidyl terephthalate, hydroxyalkylamide, isocyanate, blocked polyisocyanate, uretdione, phthalic anhydride, trimellitic anhydride, diaminodiphenyl sulfone, tetramethylglycoluril, amino resin and hydrogenated epoxy in any proportion.
[0034] Preferably, the acrylic resin is formed by mixing one or more of GMA acrylic resin, hydroxyl acrylic resin, carboxyl acrylic resin or bifunctional acrylic resin.
[0035] Preferably, the acrylic resin is polymerized by one or more monomers of acrylic acid, methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, hydroxypropyl acrylate, glycidyl acrylate, methacrylic acid, methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, hydroxypropyl methacrylate, glycidyl methacrylate, styrene and acrylonitrile.
[0036] Preferably, the acrylic resin is GMA acrylic resin, the refractive index ranges from 1.40 to 1.50, the epoxy equivalent ranges from 300-800g/eq, the glass transition temperature ranges from 40-70 ℃, the viscosity ranges from 75-600Pa.s, and the softening point temperature ranges from 100-120 ℃.
[0037] Preferably, the acrylic resin is hydroxyl acrylic resin, the refractive index ranges from 1.40 to 1.50, the hydroxyl value ranges from 15 to 70mgKOH/g, the glass transition temperature ranges from 40 to 70 ℃, the viscosity ranges from 75 to 600Pa, s, and the softening point temperature ranges from 100 ℃ to 120 ℃.
[0038] Preferably, the acrylic resin is carboxyl acrylic resin, the refractive index ranges from 1.40 to 1.50, the acid value ranges from 15 to 85mgKOH/g, the glass transition temperature ranges from 40 to 70 ℃, the viscosity ranges from 75 to 600Pa, s, and the softening point temperature ranges from 100 ℃ to 120 ℃.
[0039] Preferably, the polyester resin is one or a mixture of two of hydroxyl polyester resin and carboxyl polyester resin. [0040] Preferably, the polyester resin is prepared from ethylene glycol, propylene glycol, neopentyl glycol, 2-methyl propylene glycol and 1
One or more monomers of 6-hexanediol, terephthalic acid, isophthalic acid, adipic acid, sebacic acid, phthalic anhydride and trimellitic anhydride are polymerized.
[0041] Preferably, the polyester resin is a hydroxyl polyester resin, the hydroxyl value is in the range of 30-300mgKOH/g, the glass transition temperature is in the range of 50-75 ℃, and the viscosity is in the range of 15-200 Pa-s.
[0042] Preferably, the polyester resin is a carboxyl polyester resin, the acid value is in the range of 15-85mgKOH/g, the glass transition temperature is in the range of 50-75 ℃, and the viscosity is in the range of 15-200 Pa-s.
[0043] Preferably, the weight part ratio of the acrylic resin to the acrylic resin curing agent ranges from 95 to 75 parts
: 5-25 parts.
[0044] Preferably, the weight ratio of the polyester resin to the polyester resin curing agent ranges from 98 to 80 parts: 2-20 parts.
[0045] Preferably, the range of the gelation time of the acrylic powder coating is 100-600s, the range of the inclined plate flow is 15-35cm, and the range of the softening point temperature is 100-110 ℃.
[0046] Preferably, the range of the gelation time of the polyester powder coating is 150-800s, the inclined plate flow range is 10-25cm, and the softening point temperature range is 100-110 ℃.
[0047] Preferably, the hybrid thermosetting powder coating further comprises an auxiliary agent; more preferably, the weight portion of the auxiliary agent is 0.1-40% of the weight portion of the mixed type thermosetting powder coating, and the auxiliary agent is polyamide wax, polyolefin wax, amide modified phenol urea surfactant, benzine, polydimethylsiloxane, vinyl trichlorosilane, n-butyl triethoxysilane, methyl orthosilicate, monoalkoxy pyrophosphate, acrylate, phenolic resin, urea-formaldehyde resin, melamine formaldehyde resin, distearoyl ethylenediamine, a mixture of ethylene oxide and propylene oxide, hindered phenol, thiodipropionate diester, benzophenone, a salicylate derivative, hindered amine, alumina, fumed silica, tetrabromobisphenol eight, decabromodiphenylethane, tricresyl phosphate, aluminum hydroxide, aluminum oxide, or a mixture thereof, Any one or mixture of several of magnesium hydroxide, barium sulfate, titanium dioxide and carbon black in any proportion
[0048] Preferably, the preparation method of the composite encapsulating material for the photovoltaic module comprises the following operation steps:
[0049] a), uniformly coating the mixed thermosetting powder coating on the fiber cloth by a coating device; [0050] b) carrying out thermal bonding on the mixed thermosetting powder coating and the fiber cloth by pressurizing and heating.
[0051] c) cutting the mixed thermosetting powder coating subjected to the thermal bonding in the step b) and the fiber cloth in sections;
[0052] and d) obtaining the composite packaging material for the photovoltaic module.
[0053] Preferably, the pressurization range of the thermal bonding process is 0.05-0.25Mpa, the heating temperature range of the thermal bonding process is 90-130 ℃, and the heating time range is 5-20 seconds.
[0054] It should be noted that the melt-mixing process generally involved throughout the present invention generally includes raw material premixing, melt extrusion
The raw materials can be well and uniformly dispersed through the process steps of grinding and the like; the dry mixing process refers to directly mixing the acrylic powder coating and the polyester powder coating; GMA as referred to throughout the present invention refers to glycidyl methacrylates.
[0055] [0099] advantageous effects
[0056] The invention adopts the mixed type thermosetting powder coating prepared from acrylic resin, acrylic resin curing agent, polyester resin and polyester resin curing agent, and then uniformly coats the mixed type thermosetting powder coating on the fiber cloth as the composite packaging material for the photovoltaic module, so as to effectively realize the light weight of the packaging material for the photovoltaic module, have low manufacturing cost, replace the toughened glass of the traditional packaging structure formula and provide certain rigidity for the photovoltaic module to protect the photovoltaic cell on the premise of meeting the technical standard requirements of the photovoltaic industry such as ultraviolet resistance, aging resistance, impact resistance, fire resistance and the like, thereby not only greatly reducing the weight of the photovoltaic module, being suitable for the installation of photovoltaic power generation products in more occasions, but also reducing the labor strength of the product installation inch and improving the installation convenience, the installation cost of the photovoltaic module is reduced on the whole; more importantly, tests prove that the composite packaging material provided by the invention effectively prevents or reduces the permeation of water vapor into the interior of the photovoltaic module from the outside, has strong heat and humidity resistance and stability, has good wettability of the mixed thermosetting powder coating in the composite packaging material and fiber cloth, and has good adhesive force with the fiber cloth.
[0057] The mixed thermosetting powder coating is uniformly coated on the fiber cloth through the coating device, the mixed thermosetting powder coating is pre-bonded with the fiber cloth through pressurization and heating, and finally the composite packaging material for the photovoltaic module with a proper size is prepared through segmentation and cutting, so that the packaging size of the photovoltaic module can be randomly changed to adapt to the mounting requirements of different buildings, and the mounting and application of the photovoltaic module are further facilitated.
[0058] Description of the drawings
[0059] Fig. 1 is a block diagram of the steps of preparing a composite encapsulating material for a photovoltaic module according to an embodiment of the present invention.
[0060] FIG. 2 is a schematic structural diagram of a device for manufacturing a composite encapsulating material for a photovoltaic module according to an embodiment of the present invention;
[0061] fig. 3 is a schematic view of a typical prior art photovoltaic module package structure according to the background of the invention.
Advantageous effects of the invention
Modes for carrying out the invention
[0062] The embodiment of the invention discloses a composite packaging material for a photovoltaic module, which comprises the following raw materials: the fiber cloth is made of fiber materials in a weaving mode; the raw materials of the mixed thermosetting powder coating comprise acrylic resin, an acrylic resin curing agent, polyester resin and a polyester resin curing agent; wherein, the mixed type thermosetting powder coating is uniformly coated on the fiber cloth.
[0063] The embodiment of the invention also discloses a preparation method of the composite packaging material for the photovoltaic module, which comprises the following operation steps: a) Uniformly coating the mixed thermosetting powder coating on the fiber cloth through a coating device; b) The mixed thermosetting powder coating and the fiber cloth are thermally bonded by pressurizing and heating; c) Cutting the mixed thermosetting powder coating subjected to the thermal bonding in the step b) and the fiber cloth in sections; d) And obtaining the composite packaging material for the photovoltaic module.
[0064] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
[0065] Example 1:
[0066] a composite packaging material for a photovoltaic module comprises the following raw materials:
[0067] the fiber cloth is made of fiber materials in a weaving mode;
[0068] the raw materials of the mixed thermosetting powder coating comprise acrylic resin, an acrylic resin curing agent, polyester resin and a polyester resin curing agent; wherein, the mixed thermosetting powder coating is uniformly coated on the fiber cloth;
[0069] preferably, in the embodiment of the present invention, the weight part ratio of the fiber cloth to the hybrid thermosetting powder coating is in the range of 20 to 60 parts: 40-80 parts; more preferably, in the embodiment of the present invention, the weight ratio of the fiber cloth to the hybrid thermosetting powder coating ranges from 30 to 50 parts: 50-70 parts; specifically, in the present embodiment, the weight ratio of the fiber cloth to the hybrid thermosetting powder coating is 30 parts: 70 parts of (A). According to the detection of the embodiment of the present invention, when the weight ratio of the fiber cloth to the mixed type thermosetting powder coating is not within the preferable range of the embodiment of the present invention, specifically, when the weight ratio of the fiber cloth to the mixed type thermosetting powder coating is 15 parts: 85 inches, obviously worsens the mechanical strength, and when the weight portion of the fiber cloth and the mixed thermosetting powder coating is 85 portions: 15 inches, the weather resistance is obviously poor, and even the requirements of photovoltaic standards cannot be met, but the verification proves that the suitable range of the weight part ratio of the fiber cloth and the mixed thermosetting powder coating is wider than that of the prior application numbers CN201610685536.0 and CN201610685240.9 of the applicant by adopting the embodiment of the invention, so that the selectable range of the raw materials is improved, and the implementation of the invention is not explained any more.
[0070] Preferably, in the embodiment of the present invention, the weight per unit area of the hybrid thermosetting powder coating applied on the fiber cloth is in the range of 100-400 g/m 2, and specifically, in the present embodiment, the weight per unit area of the hybrid thermosetting powder coating applied on the fiber cloth is 100 g/m 2.
[0071]Preferably, in the embodiment of the present invention, the weight of the fiber cloth per unit area is in the range of 30 to 400g/m 2, and the weight reduction of the fiber cloth is ensured while ensuring the strength of the fiber cloth, and specifically, in the present embodiment, the weight of the fiber cloth per unit area is 100 g/m2；
[0072] Preferably, in the embodiment of the present invention, the fiber cloth is made of a fiber material by any one of plain weave, twill, satin, rib or mat weave or a combination of several weave methods, and more preferably, in the embodiment, the fiber cloth is made of a fiber material by adopting a twill weave method, because the fiber cloth made by the twill weave method has a flat cloth surface, is more favorable for infiltration of the hybrid thermosetting powder coating, and has good light transmittance and better support strength; of course, other known weaving manners can be selected by those skilled in the art according to actual needs;
[0073] preferably, in the embodiment of the present invention, the fiber material is any one or a combination of several of glass fiber, carbon fiber and aramid fiber, so as to ensure that the fiber cloth has good insulation and weather resistance, and meets the requirements of the photovoltaic related standards, and more preferably, in the embodiment, the fiber material is glass fiber, because the glass fiber has good light transmittance, low cost, wide source, and mature preparation and composite processes. Of course, those skilled in the art can select other types of fiber materials according to actual needs, and embodiments of the present invention are not described one by one.
[0074]In order to facilitate the weaving of the fibrous material and to obtain the required weight per unit area of the fibrous web, it is preferred that in the present embodiment the filament diameter of the fibrous material is in the range of 3-23 μ η iota, and it is particularly preferred that in this embodiment the filament diameter of the fibrous material is 3 μ η iota;In other embodiments of the present invention, a person skilled in the art can select a range of monofilament diameters according to actual needs, and embodiments of the present invention are not described one by one.
[0075] In order to facilitate the fiber material to be better infiltrated by the fused mixed type thermosetting powder coating in the preparation process and effectively ensure the connection effect of the thermal bonding between the mixed type thermosetting powder coating and the fiber cloth, preferably, in the embodiment of the invention, the range of gel time of the mixed type thermosetting powder coating is 50-1000s, the range of inclined plate flow is 10-40cm, and the range of softening point temperature is 80-120 ℃, and further preferably, in the embodiment of the invention, the range of gel time of the mixed type thermosetting powder coating is 100-800s, the range of inclined plate flow is 10-35 cm, and the range of softening point temperature is 100-110 ℃.
[0076] In order to ensure that the acrylic resin has good light transmittance, insulation and weather resistance and meets the requirements of photovoltaic related standards, preferably, in the embodiment of the invention, the acrylic resin has a refractive index ranging from 1.40 to 1.50, a glass transition temperature ranging from 40 to 70 ℃, a viscosity ranging from 75 to 600Pa, s and a softening point ranging from 100 ℃ to 120 ℃.
[0077] Preferably, in the embodiment of the present invention, the acrylic resin is a mixture of one or more of GMA acrylic resin, hydroxyl acrylic resin, carboxyl acrylic resin, or bifunctional acrylic resin. Specifically, in the embodiment of the present invention, the bifunctional acrylic resin may be an acrylic resin including a hydroxyl functional group and a carboxyl functional group, and may also include other types of functional groups.
[0078] Preferably, in the embodiment of the present invention, the acrylic resin is polymerized from one or more monomers of acrylic acid, methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, hydroxypropyl acrylate, glycidyl acrylate, methacrylic acid, methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, hydroxypropyl methacrylate, glycidyl methacrylate, styrene, and acrylonitrile, and of course, those skilled in the art can select other monomers to polymerize the acrylic resin according to actual needs to prepare the acrylic resin according to the embodiment of the present invention.
[0079] In order to improve the light transmittance, insulation, and weather resistance of the acrylic resin, it is further preferable that, in one embodiment of the present invention, the acrylic resin is GMA acrylic resin, the refractive index range is 1.40-1.50, the epoxy equivalent range is 800g/eq, the glass transition temperature range is 40-70 ℃, the viscosity range is 75-600Pa, s, and the softening point temperature range is 100-120 ℃; still further preferably, in an embodiment of the present invention, the refractive index range of the GMA acrylic resin is 1.42-1.48, the epoxy equivalent range is 700g/eq, the glass transition temperature range is 45-60 ℃, the viscosity range is 150-400Pa, s, and the softening point temperature range is 105-110 ℃.
[0080] In order to improve the light transmittance, insulation and weather resistance of the acrylic resin, it is further preferable that, in another embodiment of the present invention, the acrylic resin is hydroxyl acrylic resin, the refractive index range is 1.40-1.50, the hydroxyl value range is 15-70mgKOH/g, the glass transition temperature range is 40-70 ℃, the viscosity range is 75-600Pa, s, and the softening point temperature range is 100-120 ℃; still further preferably, in an embodiment of the present invention, the refractive index range of the hydroxyl acrylic resin is 1.42-1.48, the hydroxyl value range is 30-50mgKOH/g, the glass transition temperature range is 45-60 ℃, the viscosity range is 150-400Pa, s, and the softening point temperature range is 105-110 ℃.
[0081] In order to improve the light transmittance, insulation and weather resistance of the acrylic resin, it is further preferable that, in another embodiment of the present invention, the acrylic resin is carboxyl acrylic resin, the refractive index range is 1.40-1.50, the acid value range is 15-85mgKOH/g, the glass transition temperature range is 40-70 ℃, the viscosity range is 75-600Pa, s, and the softening point temperature range is 100-120 ℃; still further preferably, in an embodiment of the present invention, the refractive index range of the carboxyl acrylic resin is 1.42-1.48, the acid value range is 30-60mgKOH/g, the glass transition temperature range is 45-60 ℃, the viscosity range is 150-400Pa, s, and the softening point temperature range is 105-110 ℃.
[0082] In order to effectively ensure the crosslinking curing effect of the propylene resin, preferably, in the embodiment of the present invention, the acrylic resin curing agent is any one of or a mixture of several of carboxyl polyester resin, hydroxyl polyester resin, triglycidyl isocyanurate, triglycidyl trimellitate, diglycidyl terephthalate, hydroxyalkylamide, isocyanate, blocked polyisocyanate, uretdione, phthalic anhydride, trimellitic anhydride, sebacic acid, undecanedioic acid, dodecanedioic acid, tridecanedioic acid, tetradecanedioic acid, pentadecanedioic acid, hexadecanedioic acid, dicyandiamide, hydrogen sebacate dihydrazide, diaminodiphenylsulfone, tetramethylglycoluril, amino resin and hydrogenated epoxy in any ratio.
[0083] In order to ensure good insulation and weather resistance of the polyester resin and meet requirements of photovoltaic related standards, preferably, in the embodiment of the invention, the polyester resin is formed by mixing one or two of hydroxyl polyester resin or carboxyl polyester resin.
[0084] Preferably, in the embodiment of the present invention, the polyester resin is prepared by polymerizing one or more monomers selected from the group consisting of ethylene glycol, propylene glycol, neopentyl glycol, 2-methylpropanediol, 1, 6-hexanediol, terephthalic acid, isophthalic acid, adipic acid, sebacic acid, phthalic anhydride, and trimellitic anhydride, and of course, those skilled in the art can select other monomers according to actual needs to polymerize the polyester resin of the embodiment of the present invention.
[0085]In order to improve the wet heat resistance and weather resistance of the polyester resin, it is preferable that the polyester resin is a hydroxyl polyester resin, the hydroxyl value is in the range of 30 to 300mgKOH/g, the glass transition temperature is in the range of 50 to 75 ℃, and the viscosity is in the range of 15 to 200Pa, s;Still more preferably, in an embodiment of the present invention, the hydroxyl polyester resin has a hydroxyl value in the range of 30 to 100mgKOH/g, a glass transition temperature in the range of 55 to 65 ℃, and a viscosity in the range of 15 to 100 Pa-s.
[0086] In order to improve the wet heat resistance and weather resistance of the polyester resin, it is preferable that in another embodiment of the present invention, the polyester resin is a carboxyl polyester resin, the acid value is in the range of 15 to 85mgKOH/g, the glass transition temperature is in the range of 50 to 75 ℃, and the viscosity is in the range of 15 to 200Pa, s. More preferably, in the present examples, the carboxyl polyester resin has an acid value ranging from 30 to 60mgKOH/g, a glass transition temperature ranging from 55 to 65 ℃, and a viscosity ranging from 15 to 100 Pa-s.
[0087] In order to effectively ensure the crosslinking curing effect of the polyester resin, preferably, in the embodiment of the present invention, the polyester resin curing agent is any one of GMA acrylic resin, triglycidyl isocyanurate, triglycidyl trimellitate, diglycidyl terephthalate, hydroxyalkylamide, isocyanate, blocked polyisocyanate, uretdione, phthalic anhydride, trimellitic anhydride, diaminodiphenyl sulfone, tetramethylglycoluril, amino resin, and hydrogenated epoxy, or a mixture of several of these in any ratio.
[0088] In order to effectively ensure the crosslinking curing speed and quality of the acrylic resin, preferably, in the embodiment of the invention, the weight part ratio of the acrylic resin to the acrylic resin curing agent is in the range of 95-75 parts: 5-25 parts; in order to effectively ensure the crosslinking curing speed and quality of the polyester resin, preferably, in the embodiment of the invention, the weight part ratio of the polyester resin to the polyester resin curing agent is in the range of 98-80 parts: 2-20 parts of a solvent;
[0089] in order to further effectively ensure that the performance of the embodiment of the present invention is not affected as much as possible in severe installation environments including high-temperature and high-humidity environments, outdoor strong ultraviolet irradiation or strong wind environments, environments with high mechanical installation requirements, and the like, in the embodiment of the present invention, the weight part ratio of the acrylic resin to the polyester resin in the hybrid thermosetting powder coating is preferably in the range of 30 to 70 parts: 70-30 parts; still more preferably, in the embodiment of the present invention, in the hybrid thermosetting powder coating material, the ratio of parts by weight of the acrylic resin to parts by weight of the polyester resin ranges from 40 to 60 parts: 60-40 parts. [0090] Preferably, in the embodiment of the present invention, the hybrid thermosetting powder coating is prepared by using raw materials including acrylic resin, acrylic resin curing agent, polyester resin and polyester resin curing agent through a melt mixing process, and the embodiment can make various raw materials in a mixed system better mutually dispersed in opposite directions, so that the mixed system has stronger uniformity, and the obtained composite encapsulating material has more stable light transmittance and surface properties;
[0091] further preferably, in the embodiment of the present invention, the acrylic resin curing agent is not the same as the polyester resin; further preferably, in an embodiment of the present invention, the polyester resin curing agent is different from the acrylic resin.
[0092] The melt mixing process of the present invention generally comprises the steps of premixing raw materials, melt extruding, milling, etc., which can achieve a good uniform dispersion of the raw materials, preferably, in the present invention, the premixing time can be selected to be between 2-10 minutes, extruding and pressing the premixed mixture into thin sheets by a screw extruder, preferably, in the present invention, the length-to-diameter ratio of the extruder can be selected to be between 15: 1-50: 1, the heating temperature of the extruder is selected to be between 80-120 ℃, the rotation speed of the screw is selected to be 200-.
[0093] Of course, in other embodiments of the present invention, the hybrid thermosetting powder coating provided in the embodiments of the present invention may further include a certain amount of additives (which may be added during the raw material premixing step) for further improving the transparency and/or weather resistance and/or insulation and/or flame retardancy of the hybrid thermosetting powder coating or improving other properties or reducing the cost; further preferably, the auxiliary agent accounts for 0.1-40% of the mixed thermosetting powder coating in parts by weight, and the color of the mixed thermosetting powder coating can be adjusted by adding the auxiliary agent according to the actual requirements of photovoltaic module installation, so that the actual installation and application of the photovoltaic module are further facilitated. The auxiliary agent is any one or mixture of several of polyamide wax, polyolefin wax, amide modified phenol urea surfactant, benzine, polydimethylsiloxane, vinyl trichlorosilane, n-butyl triethoxysilane, methyl orthosilicate, monoalkoxy pyrophosphate, acrylics, phenolic resin, urea resin, melamine formaldehyde resin, distearyl ethylene diamine, a mixture of ethylene oxide and propylene oxide, hindered phenol, thiodipropionic acid diester, benzophenone, salicylate derivative, hindered amine, alumina, fumed silica, tetrabromobisphenol octa, decabromodiphenylethane, tricresyl phosphate, aluminum hydroxide, magnesium hydroxide, barium sulfate, titanium pigment and carbon black in any proportion. Of course, other types of auxiliary agents can be selected by those skilled in the art according to actual needs, and the embodiments of the present invention are not specifically described.
[0094]Specifically, in the present embodiment, the acrylic resin is GMA acrylic resin, the refractive index of the GMA acrylic resin ranges from 1.42 to 1.48, the epoxy equivalent ranges from 450-: 15 parts of (1); the polyester resin is carboxyl super-weatherproof polyester resin with the acid value of 50mgKOH/g, the glass transition temperature of 60 ℃ and the viscosity of 80 Pa.s, the polyester resin curing agent is triglycidyl isocyanurate, and the weight ratio of the carboxyl super-weatherproof polyester resin to the triglycidyl isocyanurate is95Parts by weight:5preparing; specifically, in the present embodiment, the weight ratio of GMA acrylic resin to carboxyl super-weatherable polyester resin is 50 parts: 50 parts of the raw materials.
[0095] Referring to fig. 1, in the present embodiment, the method for preparing the composite encapsulating material for photovoltaic module includes the following steps:
[0096] a), uniformly coating the mixed thermosetting powder coating on the fiber cloth by a coating device;
[0097] b) carrying out heat bonding on the mixed thermosetting powder coating and the fiber cloth by pressurizing and heating;
[0098] c) cutting the mixed thermosetting powder coating subjected to the thermal bonding in the step b) and the fiber cloth in sections;
[0099] and d) obtaining the composite packaging material for the photovoltaic module.
[0100] It should be noted that in the embodiment of the present invention, the thermal bonding process needs to be controlled by applying pressure and heat within a proper range, because only under the condition of proper pressure and temperature, a better thermal fusion bonding process can be achieved between the hybrid thermosetting powder coating and the fiber cloth, and finally the requirement of the lamination process in the process of preparing the photovoltaic module package is met, so that the package material really suitable for packaging the photovoltaic module is obtained. Therefore, in the embodiment of the present invention, the pressurization range of the thermal bonding process is preferably 0.05 to 0.25Mpa, the heating temperature range of the thermal bonding process is 90 to 130 ℃, and the time interval between two heating inches is preferably 5 to 20 seconds, specifically, in the embodiment, the pressurization pressure of the thermal bonding process is 0.05Mpa, the heating temperature of the thermal bonding process is 130 ℃, and the time interval between two heating inches is preferably 5 seconds.
[0101] Preferably, in the embodiment of the present invention, the preparation method of the composite encapsulating material for the photovoltaic module adopts the equipment shown in fig. 2, the actual implementation is performed in an inch, the fiber cloth is put into the fiber feeding machine 51, the mixed type thermosetting powder coating is uniformly coated on the fiber cloth output by the fiber feeding machine 51 through the coating device 52, then the mixed type thermosetting powder coating and the fiber cloth are subjected to heat and pressure through the hot melt compounding machine 53 to realize thermal bonding, and the mixed type thermosetting powder coating subjected to the thermal bonding and the fiber cloth are subjected to segment cutting, so as to obtain the composite encapsulating material for the photovoltaic module. In other embodiments of the present invention, the coating device may also adopt a powder spreading head, and the coating process is realized by a powder spreading mode of the coating device, so that the mixed type thermosetting powder coating is uniformly coated on the fiber cloth. Of course, those skilled in the art can select any known equipment to complete the preparation of the composite packaging material for photovoltaic modules, which is disclosed by the invention, according to actual needs
[0102] It should be particularly noted that, in other embodiments of the present invention, those skilled in the art can select other types of preferred acrylic resin, polyester resin, acrylic resin curing agent, polyester resin curing agent and fiber cloth proposed in this embodiment, and select other preferred weight parts of acrylic resin and polyester resin, acrylic resin and acrylic resin curing agent, polyester resin and polyester resin curing agent and fiber cloth and mixed thermosetting powder coating proposed in this embodiment, and select other preferred pressure, heating temperature and heating time of the thermal bonding process proposed in this embodiment, according to the practical situation, and the embodiments obtained by combining these preferred technical solutions can also obtain the technical effects substantially the same as or not obvious from the technical effects of this embodiment As a result, for those embodiments that can achieve substantially the same or substantially different technical effects, it is believed that those skilled in the art can directly combine descriptions according to the embodiments of the present invention, and the embodiments of the present invention are not separately developed for the descriptions.
[0103] Example 2 the remaining technical solutions of this example 2 are the same as those of the above example 1, except that in this example 2, the hybrid thermosetting powder coating is prepared by using an acrylic powder coating and a polyester powder coating through a melt mixing process, wherein the acrylic powder coating is prepared by using raw materials including an acrylic resin and an acrylic resin curing agent through a melt mixing process; the polyester powder coating is prepared by adopting raw materials comprising polyester resin and a polyester resin curing agent through a melt mixing process; in order to facilitate the fiber material to be better infiltrated by the fused mixed thermosetting powder coating in the preparation process and effectively ensure the connection effect of the thermal bonding between the mixed thermosetting powder coating and the fiber cloth, it is further preferable that in this embodiment, the range of the gelation time of the acrylic powder coating is 100-600s, the flow range of the inclined plate is 15-35cm, the temperature range of the softening point is 100-110 ℃, the range of the gelation time of the polyester powder coating is 150-800s, the flow range of the inclined plate is 10-25cm, and the temperature range of the softening point is 100-110 ℃.
[0104] Specifically, in the present embodiment, the gel time of the acrylic powder coating is 500s, the inclined plate flow is 20cm, the glass transition temperature is 45 ℃, and the softening point temperature range is 100 ℃ and 105 ℃. Specifically, in the present embodiment, the gel time of the polyester powder coating is 600s, the inclined plate flow is 15cm, the glass transition temperature is 50 ℃, and the softening point temperature range is 105 ℃ and 110 ℃.
[0105] Example 3 the remaining technical solutions of this example 3 are the same as those of the above example 1, except that in this example 3, the hybrid thermosetting powder coating is prepared by using an acrylic powder coating and a polyester powder coating through a dry mixing process, wherein the acrylic powder coating is prepared by using raw materials including an acrylic resin and an acrylic resin curing agent through a melt mixing process; the polyester powder coating is prepared by adopting raw materials comprising polyester resin and a polyester resin curing agent through a melt mixing process.
[0106] Example 4 the remaining technical solutions of this example 4 are the same as those of the above example 1, except that in this example 4, the hybrid thermosetting powder coating is prepared by using an acrylic powder coating, a polyester resin and a polyester resin curing agent through a melt mixing process, wherein the acrylic powder coating is prepared by using raw materials including an acrylic resin and an acrylic resin curing agent through a melt mixing process.
[0107] Example 5 the remaining technical solutions of this example 5 are the same as those of example 1, except that in this example 5, the hybrid thermosetting powder coating is prepared by using an acrylic resin, an acrylic resin curing agent, and a polyester powder coating through a melt mixing process, wherein the polyester powder coating is prepared by using raw materials including a polyester resin and a polyester curing agent through a melt mixing process.
[0108] Example 6 the remaining technical solution of this example 6 is the same as that of the above example 1 except that in this example 6, the acrylic resin curing agent is the same as the polyester resin, specifically, the acrylic resin curing agent is a carboxyl based super weatherable polyester resin.
[0109] Example 7 the remaining technical solution of this example 7 is the same as that of the above example 1 except that in this example 7, the polyester resin curing agent is the same as the acrylic resin, specifically, the polyester resin curing agent is a gma acrylic resin.
[0110] Example 8 the remaining technical solution of this example 8 is the same as that of the above example 1, except that in this example 8, the acrylic resin curing agent is the same as the polyester resin, and the polyester resin curing agent is the same as the acrylic resin, specifically, the acrylic resin curing agent is a carboxyl super-weatherable polyester resin, and the polyester resin curing agent is a gma acrylic resin. [0111] Example 9 the remaining technical solution of this example 9 is the same as that of the above example 1, except that in this example 9, the weight ratio of the acrylic resin to the polyester resin is 40 parts: 60 parts.
[0112] Example 10 the remaining technical solution of this example 10 is the same as that of the above example 1, except that in this example 10, the weight ratio of the acrylic resin to the polyester resin is 60 parts: 40 parts of the components.
[0113] Example 11 the remaining technical solution of this example 11 is the same as that of the above example 1, except that in this example 11, the weight ratio of the acrylic resin to the polyester resin is 30 parts: 70 parts of (A).
[0114] Example 12 the remaining technical solution of the present example 12 is the same as the above example 1, except that in the present example 12, the weight ratio of the acrylic resin to the polyester resin is 70 parts: 30 parts of.
[0115] Example 13 the remaining technical solution of this example 13 is the same as that of the above example 1, except that in this example 13, the weight ratio of the acrylic resin to the polyester resin is 25 parts: and 75 parts.
[0116] Example 14 the remaining technical solution of the present example 14 is the same as the above example 1, except that in the present example 14, the weight ratio of the acrylic resin to the polyester resin is 75 parts: and 25 parts.
[0117] Example 15 the remaining technical solution of this example 15 is the same as that of the above example 1 except that in this example 15, the weight ratio of the acrylic resin to the polyester resin is 20 parts: 80 parts of the raw materials.
[0118] Example 16 the remaining technical solution of the present example 16 is the same as the above example 1, except that in the present example 16, the weight ratio of the acrylic resin to the polyester resin is 80 parts: and 20 parts.
[0119] Example 17 the remaining technical solution of this example 17 is the same as that of the above example 1 except that in this example 17, the weight ratio of the acrylic resin to the polyester resin is 15 parts: 85 parts of the raw materials.
[0120] Example 18 the remaining technical solution of this example 18 is the same as that of the above example 1 except that in this example 18, the weight ratio of the acrylic resin to the polyester resin is 85 parts: 15 parts.
[0121] Example 19 the remaining technical solution of this example 19 is the same as that of the above example 1 except that in this example 19, the weight ratio of the acrylic resin to the polyester resin is 10 parts: and 90 parts.
[0122] Example 20 the remaining technical solution of this example 20 is the same as that of the above example 1 except that in this example 20, the weight ratio of the acrylic resin to the polyester resin is 90 parts: 10 parts.
[0123] Example 21 the remaining technical solution of this example 21 is the same as that of the above example 1, except that in this example 21, the weight ratio of the acrylic resin to the polyester resin is 5 parts: 95 parts of the components.
[0124] Example 22 the remaining technical solution of this example 22 is the same as that of the above example 1, except that in this example 22, the weight ratio of the acrylic resin to the polyester resin is 95 parts: 5 parts of the raw materials. [0125] Example 23 the remaining technical solution of this example 23 is the same as that of the above example 2, except that in this example 23, the weight ratio of the acrylic resin to the polyester resin is 40 parts: 60 parts.
[0126] Example 24 the remaining technical solution of this example 24 is the same as that of the above example 2, except that in this example 24, the weight ratio of the acrylic resin to the polyester resin is 60 parts: 40 parts of the components.
[0127] Example 25 the remaining technical solution of this example 25 is the same as that of the above example 2, except that in this example 25, the weight ratio of the acrylic resin to the polyester resin is 30 parts: 70 parts of (A).
[0128] Example 26 the remaining technical solution of this example 26 is the same as that of the above example 2, except that in this example 26, the weight ratio of the acrylic resin to the polyester resin is 70 parts: 30 parts of.
[0129] Example 27 the remaining technical solution of this example 27 is the same as that of the above example 2, except that in this example 27, the weight part ratio of the acrylic resin to the polyester resin is 25 parts: and 75 parts.
[0130] Example 28 the remaining technical solution of this example 28 is the same as that of the above example 2 except that in this example 28, the weight ratio of the acrylic resin to the polyester resin is 75 parts: and 25 parts.
[0131] Example 29 the remaining technical solution of this example 29 is the same as that of the above example 2 except that in this example 29, the weight ratio of the acrylic resin to the polyester resin is 20 parts: 80 parts of the raw materials.
[0132] Example 30 the remaining technical solution of the present example 30 is the same as the above example 2, except that in the present example 30, the weight ratio of the acrylic resin to the polyester resin is 80 parts: and 20 parts.
[0133] Example 31 the remaining technical solution of this example 31 is the same as that of the above example 2 except that in this example 31, the weight ratio of the acrylic resin to the polyester resin is 15 parts: 85 parts of the raw materials.
[0134] Example 32 the remaining technical solution of this example 32 is the same as that of the above example 2 except that in this example 32, the weight ratio of the acrylic resin to the polyester resin is 85 parts: 15 parts.
[0135] Example 33 the remaining technical solution of this example 33 is the same as that of the above example 2 except that in this example 33, the weight ratio of the acrylic resin to the polyester resin is 10 parts: and 90 parts.
[0136] Example 34 the remaining technical solution of this example 34 is the same as that of the above example 2 except that in this example 34, the weight part ratio of the acrylic resin to the polyester resin is 90 parts: 10 parts.
[0137] Example 35 the remaining technical solution of this example 35 is the same as that of the above example 2, except that in this example 35, the weight ratio of the acrylic resin to the polyester resin is 5 parts: 95 parts of the components.
[0138] Example 36 the remaining technical solution of this example 36 is the same as that of the above example 2, except that in this example 36, the weight ratio of the acrylic resin to the polyester resin is 95 parts: 5 parts of the raw materials. Comparative example 1:
this comparative example 1 uses a photovoltaic module encapsulant typical of the prior art.
Comparative example 2:
the present comparative example 2 uses the background art EVA adhesive film encapsulating material.
Comparative example 3:
in comparative example 3, a POE adhesive film packaging material of the background art was used.
Comparative example 4:
the remaining technical means of comparative example 4 are the same as those of example 1, except that in comparative example 4
The packaging material comprises 30 parts of fiber cloth and 70 parts of conventional commercial epoxy powder coating.
Comparative example 5:
this comparative example 5 is example 1 of a photovoltaic module-use packaging material made of CN201610685536.0 public based on acrylic powder coating.
Comparative example 6:
this comparative example 6 is an example 1 of a photovoltaic module encapsulant prepared from CN201610685240.9 public breathable polyester powder-based paint.
Comparative example 7:
this comparative example 7 is an example 11 of a photovoltaic module encapsulant prepared from CN201610685536.0 public breathable acrylic-based powder coating.
Comparative example 8:
this comparative example 6 is an example 5 of a photovoltaic module encapsulant prepared from CN201610685240.9 public breathable polyester-based powder coating.
Industrial applicability
The invention performs the implementation effect test for the photovoltaic technical standard aiming at the above embodiments and comparative examples, and the test results are shown in table 1 below.
Table 1 implementation effect comparison of various kinds of packaging materials applied to photovoltaic module packaging
[0157] The weight of the full-text packaging structure refers to the weight of a packaging material for a photovoltaic module in unit square meter; the shock resistance test means that ice balls with the standard diameter of 25mm and the mass of 7.53g are emitted at the speed of 23.0m/s, 11 positions of the packaged photovoltaic module are impacted, and the shock resistance of the photovoltaic module is judged according to the requirements of the appearance, the maximum power attenuation, the insulation resistance and the like; the fire resistance is the result of the test by the UL1703 standard; the pencil hardness is the result of the test according to ASTM D3363-2005 (R2011); the tensile strength is the result of GB/T1040.3-2006 standard detection; the elongation at break is the result of the test by GB/T1040.3-2006 standard.
[0158] As is apparent from the data in table 1, on the premise of meeting the requirements of the photovoltaic industry technical standards such as ultraviolet resistance, aging resistance, impact resistance, fire resistance and the like, the embodiment of the invention effectively realizes the light weight of the packaging material of the photovoltaic module, has low manufacturing cost, replaces the toughened glass of the traditional packaging structure, and provides certain rigidity for the photovoltaic module to protect the photovoltaic cell, so that the weight of the photovoltaic module can be greatly reduced, the photovoltaic module is suitable for the installation of photovoltaic power generation products in more occasions, the labor intensity of the product installation time can be reduced, the installation convenience is improved, and the installation cost of the photovoltaic module is reduced on the whole.
[0159] It is further emphasized that, in the embodiment of the present invention, the hybrid thermosetting powder coating is uniformly coated on the fiber cloth by the coating device, the hybrid thermosetting powder coating is pre-bonded to the fiber cloth by pressurizing and heating, and finally the composite encapsulating material of the photovoltaic module with the appropriate size is obtained by cutting in sections, so that the encapsulating size of the photovoltaic module can be arbitrarily changed to meet the installation requirements of different buildings, and the installation and application of the photovoltaic module are further facilitated.
[0160] The present invention also compares the specific items with respect to the above examples and comparative examples, and the comparison results are shown in the following table 2.
[0161] Table 2 implementation effect contrast of various kinds of packaging materials applied to photovoltaic module packaging
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TABLE 1 adhesion rate comparing the weather resistance and resistance to humidity and heat and the mechanical properties of fiber cloth and moisture permeability and qualitative wettability example 1 +++++++
Example 2 + + + ++
Example 3 + + + ++
Example 4 ++++++++
Example 5 ++++++++
Example 6- +++++++++++
7
Example 8 ++++++++++++++++++++++++++++++++++++++++++++ example 9 +++++++++
12
Example 13 ++++++++
Examples 14 + + + ++++++++++ of 15, 17
、 16、 18
Example 19 ++++++++
、 21
Examples 20 +++++++, 22
Example 23 + + + ++
-26 example 27 + + ++
、 29、 31
Example 28 + + +
、 30、 32
Example 33 ++++++++
、 35
Example 34 ++++++++, 36 comparative example 1 +++++++ 11
Comparative example 2 +++++++++ 11 ++ comparative example 3 +++++++ 11 ++ comparative example 4 ++++++++ 5 ++++++ comparative example 5 +++++++++++++++++++ comparative example 6 ++++++++++++++++++
Comparative example 7 + + + +++++++++++++++++++++++ comparative example 8 + + + ++++++++++ in the above table 2 of the present invention indicates that its corresponding example or comparative example does not meet the photovoltaic standard under the comparative item, "-" indicates that its corresponding example or comparative example does not fit the comparative item, wherein the larger the number of "+" represents that its corresponding example or comparative example performs better under the comparative item, specifically, under the "cost" comparative item, every 1 "+" represents that its corresponding example or comparative example is reduced by about 10-20% in "cost"; under the comparison term of the "wet heat resistance stability", 1 more "+" represents that the corresponding embodiment or comparative example improves the "wet heat resistance stability" by about 10 to 20 percent; under the comparison term of "weather resistance", each 1 plus "+" represents that the corresponding example or comparative example has 10 to 20 percent improvement on the "weather resistance"; under the comparison term of 'wettability with fiber cloth', each more than 1 '+' represents that the corresponding example or comparative example has 10 to 20 percent of improvement on 'wettability with fiber cloth'; under the comparison term of 'adhesion to fiber cloth', each more than 1 '+' represents that the corresponding example or comparative example improves the 'adhesion to fiber cloth' by about 10-20%; under the comparison term of "mechanical property", each more than 1 "+" represents that the corresponding example or comparative example is improved by about 10 to 20 percent on the "mechanical property"; under the comparison term of water vapor transmission rate, each more than 1 "+" represents that the corresponding embodiment or comparative example reduces the water vapor transmission rate by about 10 to 20 percent
[0163] In table 2 above, the better the "resistance to moist heat" and the lower the "water vapor transmission rate" indicate that it is suitable for use in a high temperature and high humidity environment; the better the weather resistance, and the better the weather resistance, and the; the wettability of the mixed thermosetting powder coating and the adhesion of the mixed thermosetting powder coating to the fiber cloth are respectively the wettability and the adhesion of the mixed thermosetting powder coating to the fiber cloth, and the better the wettability of the mixed thermosetting powder coating and the adhesion of the mixed thermosetting powder coating to the fiber cloth are, the better the strength is and the connection quality with the fiber cloth is, so that the mixed thermosetting powder coating is suitable for being applied to environments with high mechanical installation requirements; the term "mechanical properties" refers to the overall mechanical performance of the examples of the present invention, including adhesion, impact resistance, pencil hardness, and other mechanical properties.
[0164] As is clear from table 2 above: by implementing the invention, a large number of embodiments with obviously better comprehensive performance than those of comparative examples 5-8 can be obtained, the embodiments can effectively ensure the service life of the photovoltaic module in severe installation environments such as high-temperature and high-humidity environment, outdoor strong ultraviolet illumination or strong wind environment, environment with high mechanical installation requirement and the like, and the cost is lower, so that the photovoltaic module is very suitable for large-scale implementation and application; among them, the mixed thermosetting powder coating preparation methods of examples 2 and 3 according to the present invention have the most excellent practical effects under the same other practical conditions; under other same implementation conditions, when the acrylic resin curing agent is different from the polyester resin, and the performance of the embodiment of the polyester resin curing agent is different from that of the acrylic resin, the performance of the embodiment of the invention is obviously better than that of the embodiment of the invention of the same inch; under other same implementation conditions, when the weight ratio of the acrylic resin and the polyester resin is in the range of 40-60 parts: the best implementation effect of 60-40 inches is different, and the weight ratio range is 30-70 parts: 70-30 parts and 40-60 parts: the effect of 60-40 inches was the next time.
[0165] Although the material obtained in this embodiment can achieve excellent implementation effects when applied to encapsulation of a photovoltaic module, the photovoltaic field is not the only application field of the material, and those skilled in the art can fully apply the present invention to other suitable fields according to the requirements of the actual application field, along with the properties and achieved technical effects of the composite encapsulating material for photovoltaic modules disclosed by the present invention, and such application does not require any creative labor and still belongs to the spirit of the present invention, so such application is also considered as the scope of protection of the present invention.
[0166] It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
[0167] Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (1)
- ClaimsThe composite packaging material for the photovoltaic module is characterized by comprising the following raw materials:the fiber cloth is made of fiber materials in a weaving mode;the mixed thermosetting powder coating comprises raw materials of acrylic resin, an acrylic resin curing agent, polyester resin and a polyester resin curing agent; wherein, the mixed type thermosetting powder coating is uniformly coated on the fiber cloth. The composite encapsulating material for photovoltaic modules as claimed in claim 1, wherein the weight ratio of the fiber cloth to the hybrid thermosetting powder coating is in the range of 20 to 60 parts: 40-80 parts.The composite encapsulating material for photovoltaic module as claimed in claim 1 or 2, wherein the weight per unit area of the fiber cloth is in the range of 30-400g/m 2, and the weight per unit area of the hybrid thermosetting powder coating coated on the fiber cloth is in the range of 100-400 g/m 2. The composite encapsulating material for photovoltaic modules as claimed in claim 1, wherein in the hybrid thermosetting powder coating, the weight ratio of the acrylic resin to the polyester resin is in the range of 30-70 parts: 70-30 parts.The composite encapsulating material for photovoltaic modules as claimed in claim 1, wherein in the hybrid thermosetting powder coating, the weight ratio of the acrylic resin to the polyester resin is in the range of 40-60 parts: 60-40 parts.The composite encapsulating material for photovoltaic modules as claimed in claim 1, wherein the hybrid thermosetting powder coating has a gel time range of 50-1000s, a sloping plate flow range of 10-40cm, and a softening point temperature range of 80-120 ℃.The composite encapsulating material for the photovoltaic module as claimed in claim 1, wherein the hybrid thermosetting powder coating is prepared by adopting raw materials comprising acrylic resin, an acrylic resin curing agent, polyester resin and a polyester resin curing agent through a melt mixing process. The composite encapsulating material for the photovoltaic module as claimed in claim 1, wherein the hybrid thermosetting powder coating is prepared by a melt mixing process using an acrylic powder coating and a polyester powder coating, wherein the acrylic powder coating is prepared by a melt mixing process using raw materials including an acrylic resin and an acrylic resin curing agent;the polyester powder coating is prepared from raw materials including polyester resin and a polyester resin curing agent through a melting and mixing process.The composite encapsulating material for photovoltaic module as claimed in claim 1, wherein the hybrid thermosetting powder coating is prepared by a dry blending process using an acrylic powder coating and a polyester powder coating, wherein,the acrylic powder coating is prepared by adopting raw materials comprising acrylic resin and an acrylic resin curing agent through a melt mixing process;the polyester powder coating is prepared from raw materials including polyester resin and a polyester resin curing agent through a melting and mixing process.The composite encapsulating material for the photovoltaic module as claimed in claim 1, wherein the hybrid thermosetting powder coating is prepared by a melt mixing process using acrylic powder coating, polyester resin and polyester resin curing agent, and wherein the acrylic powder coating is prepared by a melt mixing process using raw materials including acrylic resin and acrylic resin curing agent. The composite encapsulating material for the photovoltaic module as claimed in claim 1, wherein the hybrid thermosetting powder coating is prepared by adopting acrylic resin, an acrylic resin curing agent and a polyester powder coating through a melt mixing process, and wherein the polyester powder coating is prepared by adopting raw materials comprising polyester resin and a polyester curing agent through a melt mixing process.A composite encapsulating material for a photovoltaic module as claimed in claim 7, characterized in that said acrylic resin curing agent is different from said polyester resin.A composite encapsulating material for a photovoltaic module as claimed in claim 7, characterized in that said polyester resin curing agent is different from said acrylic resin.A composite encapsulating material for photovoltaic modules according to claim 1 or 7 or 8 or 9 or 10 or 11 or 12 or 13, the acrylic resin curing agent is any one or mixture of several of carboxyl polyester resin, hydroxyl polyester resin, triglycidyl isocyanurate, triglycidyl trimellitate, diglycidyl terephthalate, hydroxyalkylamide, isocyanate, blocked polyisocyanate, uretdione, phthalic anhydride, trimellitic anhydride, sebacic acid, undecanedioic acid, dodecanedioic acid, tridecanedioic acid, tetradecanedioic acid, pentadecanedioic acid, hexadecanedioic acid, dicyandiamide, hydrogen sebacate dihydrazide, diaminodiphenyl sulfone, tetramethyl glycoluril, amino resin and hydrogenated epoxy in any proportion.The composite encapsulating material for photovoltaic modules as claimed in claim 1, 7, 8, 9, 10, 11, 12 or 13, wherein the polyester resin curing agent is any one or a mixture of several of GMA acrylic resin, triglycidyl isocyanurate, triglycidyl trimellitate, diglycidyl terephthalate, hydroxyalkylamide, isocyanate, blocked polyisocyanate, uretdione, phthalic anhydride, trimellitic anhydride, diaminodiphenyl sulfone, tetramethylglycoluril, amino resin and hydrogenated epoxy in any ratio.A method for preparing a composite encapsulating material for photovoltaic modules according to any of claims 1 to 15, characterized in that it comprises the following operating steps:a) uniformly coating the mixed thermosetting powder coating on the fiber cloth by a coating device;b) the mixed thermosetting powder coating and the fiber cloth are thermally bonded by pressurizing and heating;c) cutting the mixed thermosetting powder coating subjected to the heat bonding in the step b) and the fiber cloth in sections;
the method of claim 16, wherein the thermal bonding process is performed at a pressure ranging from 0.05Mpa to 0.25Mpa, a heating temperature ranging from 90 ℃ to 130 ℃, and a time ranging from 5 seconds to 20 seconds.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/092291 WO2019006765A1 (en) | 2017-07-07 | 2017-07-07 | Composite packaging material for photovoltaic assembly and method for preparing composite packaging material |
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| CN110832138A true CN110832138A (en) | 2020-02-21 |
| CN110832138B CN110832138B (en) | 2022-08-26 |
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| FR3107990A1 (en) | 2020-03-05 | 2021-09-10 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | LIGHTWEIGHT PHOTOVOLTAIC MODULE FEATURING FRONT AND BACK POLYMER LAYERS AND FIBER REINFORCEMENTS |
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| CN110832138B (en) | 2022-08-26 |
| WO2019006765A1 (en) | 2019-01-10 |
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