CN115816877A - Photovoltaic module frame and preparation method thereof - Google Patents
Photovoltaic module frame and preparation method thereof Download PDFInfo
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- CN115816877A CN115816877A CN202211576223.3A CN202211576223A CN115816877A CN 115816877 A CN115816877 A CN 115816877A CN 202211576223 A CN202211576223 A CN 202211576223A CN 115816877 A CN115816877 A CN 115816877A
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Abstract
The embodiment of the disclosure relates to the field of photovoltaic cells, and provides a photovoltaic module frame and a preparation method thereof, wherein the preparation method comprises the following steps: weighing raw materials, wherein the raw materials comprise reinforcing particles, isocyanate, polymer polyol and glass fiber yarn; adding the reinforcing particles into isocyanate, and stirring for reaction to obtain a premix, wherein the premix comprises modified reinforcing particles, and the modified reinforcing particles are polymer particles of which the reinforcing particles are blocked by the isocyanate; mixing the premix and polymer polyol, injecting the mixture into a pultrusion die with glass fiber yarns, finishing curing, pulling out a formed pultruded profile from an outlet of the pultrusion die through a traction device, and cutting the pultruded profile into a long frame and a short frame which are suitable for the size of the photovoltaic module; the photovoltaic module frame is assembled by the long frame and the short frame through the corner connectors, and dispersed modified reinforcing particles are arranged in the photovoltaic module frame. The photovoltaic module frame and the preparation method thereof provided by the embodiment of the application are at least beneficial to improving the service performance of the photovoltaic module frame.
Description
Technical Field
The embodiment of the disclosure relates to the field of photovoltaic cells, in particular to a photovoltaic module frame and a preparation method thereof.
Background
Solar energy is one of the most important clean and renewable energy sources, with the development of photovoltaic technology, the cost of photovoltaic power generation is close to the thermal power cost, and the photovoltaic power generation is more and more popular due to the characteristics of low investment, zero pollution, long service life, short investment return cycle and the like.
Solar modules (or photovoltaic modules) are important devices for converting solar energy into electrical energy. The photovoltaic frame is an important part for fixing the photovoltaic module, and can protect the photovoltaic module from being corroded or damaged by wind power. The photovoltaic frame is required to be high in strength, light in weight, attractive in appearance, low in cost and the like. At present, common materials of the solar photovoltaic frame support comprise aluminum alloy, galvanized steel and composite materials, wherein the aluminum alloy material is most popular, but the manufacturing of the aluminum alloy frame and the galvanized steel frame consumes a large amount of metal resources, and the cost is high, so that the development potential of the composite material frame is huge.
Disclosure of Invention
The embodiment of the disclosure provides a photovoltaic module frame and a preparation method thereof, which are at least beneficial to improving the service performance of the photovoltaic module frame.
According to some embodiments of the present disclosure, in one aspect, the present disclosure provides a method for manufacturing a photovoltaic module bezel, including: weighing raw materials, wherein the raw materials comprise reinforcing particles, isocyanate, polymer polyol and glass fiber yarn; adding the reinforcing particles into isocyanate, and stirring for reaction to obtain a premix, wherein the premix comprises modified reinforcing particles, and the modified reinforcing particles are polymer particles of which the reinforcing particles are blocked by the isocyanate; mixing the premix and polymer polyol, injecting the mixture into a pultrusion die with glass fiber yarns, finishing curing, pulling out a formed pultruded profile from an outlet of the pultrusion die through a traction device, and cutting the pultruded profile into a long frame and a short frame which are suitable for the size of the photovoltaic module; the photovoltaic module frame is assembled by the long frame and the short frame through the corner connectors, and dispersed modified reinforcing particles are arranged in the photovoltaic module frame.
In some embodiments, the reinforcing particles comprise polyphenylene ether particles.
In some embodiments, the reinforcing particles have a diameter of 6 to 40 μm.
In some embodiments, the raw materials comprise the following components in parts by mass: 1 to 3 portions of reinforcing particles, 5 to 10 portions of isocyanate, 10 to 20 portions of polymer polyol and 70 to 80 portions of glass fiber yarn.
In some embodiments, the reaction conditions under which the reinforcing particles are added to the isocyanate and stirred to react to obtain the premix are: the stirring temperature is 20-25 ℃, and the stirring time is 0.5-1 hour.
In some embodiments, mixing the premix with the polymer polyol and injecting into a pultrusion die in which the glass fiber yarn is placed to complete the curing further comprises: and (3) putting the glass fiber yarn through a yarn putting device, finishing the yarn through a yarn threading die, guiding the yarn into a squeezing and drawing die through a guiding device, and soaking the glass fiber yarn by using the premix and the polymer polyol.
In some embodiments, the feedstock further comprises: an auxiliary agent including at least one of an antioxidant, an ultraviolet absorber, a light stabilizer, a water absorbent, a moisture dispersant, a defoaming agent, or a mold release agent; before the premix and the polymer polyol are mixed and injected into a pultrusion die where the glass fiber yarns are placed and the curing is completed, the method further comprises the following steps: the auxiliary agent is added into the polymer polyol and stirred uniformly.
In some embodiments, the isocyanate comprises at least one of toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, and dicyclohexylmethane-4, 4' -diisocyanate; the polymer polyol includes at least one of polyether polyol and polyester polyol.
In some embodiments, the temperature of the pultrusion die ranges from 60 ℃ to 80 ℃; the traction speed of the traction device is 1.0-3.0 m/min.
According to some embodiments of the present disclosure, another aspect of the embodiments of the present disclosure further provides a photovoltaic module bezel, including: the composite material is prepared by compounding 1-3 parts by mass of modified reinforcing particles, 5-10 parts by mass of isocyanate, 10-20 parts by mass of polymer polyol and 70-80 parts by mass of glass fiber yarn, wherein the end group of the modified reinforcing particles is isocyanate, and the modified reinforcing particles are uniformly dispersed in a frame of a photovoltaic module.
The technical scheme provided by the embodiment of the disclosure has at least the following advantages: the reinforcing particles are added into the isocyanate, so that the isocyanate and the reinforcing particles can react to obtain the premix with the modified reinforcing particles, and then the premix and the polymer polyol are injected into a pultrusion die with glass fiber yarns for reaction, curing and molding to obtain the photovoltaic assembly frame with the modified reinforcing particles uniformly dispersed inside, wherein the reinforcing particles can have corrosion resistance, ageing resistance, insulation or flame retardant property, so that the modified reinforcing particles are dispersed in the photovoltaic assembly frame, the corrosion resistance, ageing resistance, insulation or flame retardant property of the photovoltaic assembly frame can be improved, and the dispersed reinforcing particles can properly disperse the stress on the photovoltaic assembly frame, thereby properly increasing the strength of the photovoltaic assembly frame. In addition, the modified reinforcing particles are polymer particles obtained after the end groups of the reinforcing particles react with isocyanate, and as the modified particles react with the isocyanate, a part of the isocyanate can be consumed, so that the using amount of the isocyanate is increased, the content of the isocyanate in the formed polyurethane composite material is increased, the R value of the corresponding polyurethane composite material is increased, and when the polymer polyol with a higher hydroxyl value is selected, the using amount proportion of the isocyanate is increased, so that the increase of the number of hard segments in the polyurethane composite material can be facilitated, and the strength of the cured polyurethane is higher. Through mixing premix and polymer polyol and injecting to the crowded drawing mould of placing the fine yarn of glass in the completion solidification to draw fashioned pultrusion section bar from crowded drawing mould export through draw gear, further cut into the long frame and the short frame that are fit for the photovoltaic module size with pultrusion section bar, the rethread angle sign indicating number assembles the photovoltaic module frame with long frame and short frame, can form the photovoltaic module frame of equidimension not in order to cooperate the photovoltaic module of equidimension not, the variety of photovoltaic module preparation has been improved.
Drawings
One or more embodiments are illustrated by corresponding figures in the drawings, which are not to be construed as limiting the embodiments, unless expressly stated otherwise, the drawings are not to scale; in order to more clearly illustrate the embodiments of the present disclosure or technical solutions in the conventional art, the drawings required to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without inventive efforts.
Fig. 1 is a process flow diagram corresponding to a method for manufacturing a photovoltaic module frame according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a photovoltaic module frame according to another embodiment of the present disclosure.
Detailed Description
As can be seen from the background, the development potential of composite material frames is enormous.
Because the outdoor service life of the solar photovoltaic module is about 25 years, the frame of the solar photovoltaic module has good performances of oxidation resistance, corrosion resistance and the like. The existing photovoltaic frame is mainly made of aluminum alloy, the photovoltaic industry is used as the renewable energy industry encouraged by the state to support and promote, huge electric energy sources are consumed for producing aluminum products, and the concept of energy conservation and environmental protection is contrary to the idea of energy conservation and environmental protection. The novel environment-friendly material is used, the structure of the energy industry is changed, the innovation of the material energy industry is promoted, and the significance and the potential of the polyurethane glass fiber composite material frame are self-evident. However, the photovoltaic module frame needs to have characteristics of corrosion resistance, oxidation resistance, strong strength and firmness, strong tensile resistance, high fatigue value and long service life, so that the photovoltaic module frame can adapt to different environments. Therefore, the performance of the polyurethane composite frame still needs to be improved.
According to some embodiments of the present disclosure, an embodiment of the present disclosure provides a method for manufacturing a photovoltaic module frame, so as to improve the usability of the photovoltaic module frame.
Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in the embodiments of the disclosure, numerous technical details are set forth in order to provide a better understanding of the disclosure. However, the claimed subject matter of the present disclosure can be practiced without these specific details and with various changes and modifications based on the following examples.
Fig. 1 is a process flow diagram of a preparation method of a photovoltaic module frame provided in an embodiment of the present application, and the photovoltaic module frame provided in this embodiment is described in detail below with reference to the accompanying drawings, specifically as follows:
the preparation method of the photovoltaic module frame comprises the following steps:
step S1: weighing raw materials, wherein the raw materials comprise reinforcing particles, isocyanate, polymer polyol and glass fiber yarns.
For the isocyanate, in some embodiments, the isocyanate includes at least one of toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, and dicyclohexylmethane-4, 4' -diisocyanate.
For the polymer polyol, in some embodiments, the polymer polyol includes at least one of a polyether polyol and a polyester polyol.
For the fiberglass yarn, the linear density of the fiberglass yarn may be 2400 to 4800g/km, for example 2400g/km, 2450g/km, 2500g/km, 3000g/km, 3500g/km, 4500g/km, 4600g/km or 4800g/km (specification 2400TEX-4800TEX, i.e., 2400 to 4800 grams of weight per kilometer of fiberglass yarn); the diameter of the glass fibers may be 10 to 30 μm, for example 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, 15 μm, 18.9 μm or 30 μm. In some embodiments, whole strands of alkali-free glass fibers may be used to facilitate drawing during the manufacturing process.
For the reinforcing particles, in some embodiments, the reinforcing particles comprise polyphenylene ether particles.
It is understood that the reaction of the isocyanate and the polymer polyol may form a polyurethane composite, wherein the reinforcing particles may modify the polyurethane composite to enhance the performance properties of the polyurethane composite. For example, the polyphenylene oxide particles have good flame retardant property, and when the polyphenylene oxide particles are added into the polyurethane composite material, the flame retardant property of the polyurethane composite material can be improved, so that the flame retardant property of a composite material frame formed by the polyurethane composite material is improved.
In this embodiment, the materials of the isocyanate and the polymer polyol are not particularly limited, and the isocyanate and the polymer polyol can be reacted to produce the polyurethane composite. For the reinforcing particles, in some embodiments, the reinforcing particles may also be other particles having properties that increase polymer strength, corrosion resistance, aging resistance, insulation, or flame retardancy to improve the performance properties of the polyurethane composite.
In some embodiments, the raw material may further include an adjuvant including at least one of an antioxidant, an ultraviolet absorber, a light stabilizer, a water absorbent, a moisture dispersant, a defoaming agent, or a mold release agent. Before the premix and the polymer polyol are mixed and injected into a pultrusion die where the glass fiber yarns are placed and the curing is completed, the method further comprises the following steps: the auxiliary agent is added into the polymer polyol and stirred uniformly.
The prepared polyurethane composite material is not easy to yellow due to the antioxidant, the ultraviolet absorbent, the light stabilizer and the like, and the mechanical property of the polyurethane composite material exposed to outdoor conditions for a long time is improved.
For antioxidants, in some embodiments, the antioxidant can be at least one of a phenolic, phosphite, or ketone antioxidant.
For the ultraviolet absorber, in some embodiments, the ultraviolet absorber can be a ketone or triazole-based ultraviolet absorber.
As for the light stabilizer, in some embodiments, the light stabilizer may be an ester or phosphite based light stabilizer.
The water absorbent can ensure the anhydrous environment of the reaction of the isocyanate and the polymer polyol; the wetting dispersant can repeatedly disperse the isocyanate and the polymer polyol so as to fully react the isocyanate and the polymer polyol; the defoaming agent can avoid the strength reduction of the produced polyurethane composite material caused by the bubbles in the produced polyurethane composite material; the release agent can enable the molded polyurethane composite material to be taken out from the mold more easily, and avoids the phenomenon that the molded polyurethane composite material is deformed when being taken out due to the adhesion of the polyurethane composite material and the mold.
As for the water absorbing agent, in some embodiments, the water absorbing agent includes one or more of an oxazolidine-based water absorbing agent, a carbodiimide-based water absorbing agent, or an orthoformate-based water absorbing agent.
As for the wetting dispersant, in some embodiments, the wetting dispersant includes an acrylate polymer type dispersant, a polyurethane or polyester type polymer dispersant, or the like.
For the anti-foaming agent, in some embodiments, the anti-foaming agent comprises a fluorine-based anti-foaming agent.
For release agents, in some embodiments, the release agents include fatty acids, paraffin, glycerin, petrolatum, and the like.
In some embodiments, the raw materials comprise the following components in parts by mass: the reinforcing particles comprise 1 to 3 parts (e.g., 1 part, 1.1 parts, 1.5 parts, 2 parts, 2.5 parts, 2.9 parts, or 3 parts), the isocyanate comprises 5 to 10 parts (e.g., 5 parts, 5.1 parts, 6 parts, 7 parts, 7.4 parts, 8 parts, 9 parts, 9.7 parts, or 10 parts), the polymer polyol comprises 10 to 20 parts (e.g., 10 parts, 10.5 parts, 12 parts, 15 parts, 16.7 parts, 19 parts, or 20 parts), and the glass fiber yarn comprises 70 to 80 parts (e.g., 70 parts, 71.2 parts, 75 parts, 78 parts, 79.8 parts, or 80 parts).
Reference is made to the following table for the strength effect of different compositions of the reinforcing particles on the photovoltaic module frame.
It can be understood that the mass fraction of the reinforcing particles is increased, and the modification effect on the polyurethane composite material is correspondingly increased (for example, in examples 1 to 2), but too many reinforcing particles in the polyurethane composite material can cause the agglomeration phenomenon of the reinforcing particles (for example, in example 3), so that the polyurethane composite material has defects, and the strength of the polyurethane composite material is reduced. Therefore, the mass parts of the reinforcing particles need to be selected in combination with the mass parts of the polyurethane, so that agglomeration caused by adding excessive reinforcing particles is avoided, the service performance of the polyurethane composite material is improved, and the influence on the strength of the polyurethane composite material is avoided.
Step S2: adding the reinforcing particles into isocyanate, and stirring for reaction to obtain a premix, wherein the premix comprises modified reinforcing particles, and the modified reinforcing particles are polymer particles of which the reinforcing particles are blocked by the isocyanate.
The reinforcing particles react with isocyanate, so that the end groups of the reinforcing particles react with isocyanate and then are blocked to generate modified reinforcing particles, and in the case that the reinforcing particles are polyphenylene oxide particles, the chemical reaction equation of the reaction of the polyphenylene oxide particles and the isocyanate is as follows:
it will be appreciated that each polyphenylene ether molecular chain includes two end groups at the ends of the polyphenylene ether, and therefore, each polyphenylene ether needs to be reacted with at least two isocyanates, and since there is an excess of isocyanate, the remaining isocyanate can be reacted with the polymer polyol to produce a polyurethane composite. Therefore, the mass fraction of polyphenylene ether particles, the mass fraction of polymer polyol and the mass fraction of isocyanate need to satisfy appropriate conditions so that the terminal groups of polyphenylene ether particles can sufficiently react with isocyanate and the remaining isocyanate can sufficiently satisfy the reaction requirement with polymer polyol.
In some embodiments, the diameter of the reinforcing particles is 6 to 40 μm, specifically, the diameter of the reinforcing particles may be 6.5 μm, 8 μm, 10 μm, 15.7 μm, 20 μm, 28.5 μm, 39.9 μm, or 40 μm.
For example, reference is made to the following table for the effect of different diameters of the reinforcing particles on the bending strength of the photovoltaic module frame:
according to the influence of the reinforcing particles with different diameters on the bending strength of the frame of the photovoltaic assembly, the diameters of the reinforcing particles need to meet certain conditions, so that the modified reinforcing particles generated after the reinforcing particles react with isocyanate can be uniformly dispersed in the polyurethane composite material. The larger the diameter of the reinforcing particles, the larger the diameter of the corresponding modified reinforcing particles, and the modified reinforcing particles having the appropriate diameter are dispersed in the finally formed polyurethane composite material, the strength of the polyurethane composite material can be appropriately increased (for example, examples 4 to 6), but when the diameter of the modified reinforcing particles is too large (for example, example 7), defects may be generated in the polyurethane composite material, and the strength of the polyurethane composite material may be reduced. Therefore, the diameter of the reinforcing particles needs to be selected in combination with the size of the actual polyurethane composite material, so that the use performance of the polyurethane composite material is improved, and the strength of the polyurethane composite material is prevented from being reduced due to the excessively large modified reinforcing particles.
In some embodiments, the reaction conditions under which the reinforcing particles are added to the isocyanate and stirred to react to obtain the premix are: the stirring temperature is 20 to 25 ℃ (e.g., 20 ℃, 21 ℃, 22 ℃, 24.5 ℃ or 25 ℃) and the stirring time is 0.5 to 1 hour (e.g., 0.5 hour, 0.6 hour, 0.7 hour, 0.88 hour, 0.9 hour or 1 hour).
It will be appreciated that when the stirring temperature is low, it is possible that the reinforcing particles do not react with the isocyanate; when the stirring temperature is too high, additional side reactions of the reinforcing particles with the isocyanate may result. Therefore, the temperature of the agitation needs to be within a suitable range to allow the reinforcing particles to react sufficiently with the isocyanate while avoiding the generation of other by-products due to excessive reaction temperatures. In addition, the shorter the stirring time, the less time the reinforcing particles react with the isocyanate, and the reinforcing particles may not react sufficiently with the isocyanate; the longer the stirring time is, the degree of reaction between the reinforcing particles and the isocyanate cannot be increased, and the time of the whole process flow is increased, so that the preparation efficiency of the photovoltaic module frame is reduced. Therefore, the stirring time is required to meet the premise that the reinforcing particles and the isocyanate are fully reacted, and the preparation efficiency of the photovoltaic module frame is improved.
And step S3: and mixing the premix and polymer polyol, injecting the mixture into an extrusion-drawing die with glass fiber yarns, solidifying the mixture, drawing out the formed pultrusion section from an outlet of the extrusion-drawing die through a traction device, and cutting the pultrusion section into a long frame and a short frame which are suitable for the size of the photovoltaic module.
In some embodiments, the temperature of the pultrusion die ranges from 60 to 80 ℃ (e.g., 60 ℃, 62 ℃, 65 ℃,70 ℃, 75.5 ℃, or 80 ℃); the pulling rate of the pulling device is 1.0 to 3.0m/min (e.g., 1.0m/min, 1.2m/min, 1.5m/min, 1.8m/min, 2.0m/min, 2.3m/min, 2.55m/min, 2.8m/min, or 3.0 m/min).
It is understood that the isocyanate and the polymer polyol need to be cured at a certain temperature, the curing and the forming of the polyurethane composite material are not facilitated by too low temperature, and the isocyanate and the polymer polyol may be cured excessively by reaction due to too high temperature, so that the traction of the traction device is not facilitated. Therefore, the temperature of the pultrusion die needs to be selected within a certain range to meet the curing requirement of the reaction of the isocyanate and the polymer polyol, and simultaneously, the pulling device is facilitated to pull out the formed pultruded profile from the outlet of the pultrusion die. In addition, the traction speed of the traction device needs to be matched with the pultrusion die so that the pultruded profile can be oriented along the pultrusion direction, and therefore the orientation degree and the strength of the pultruded profile are improved.
Through being the long frame and the short frame of suitable photovoltaic module size with the pultrusion section bar cutting, can make the not photovoltaic module of equidimension of size cooperation of pultrusion section bar.
In some embodiments, mixing the premix with the polymer polyol and injecting into the pultrusion die to complete the curing further comprises: and (3) putting the glass fiber yarn through a yarn putting device, finishing the yarn through a yarn threading die, guiding the yarn into a squeezing and drawing die through a guiding device, and soaking the glass fiber yarn by using the premix and the polymer polyol. By soaking the glass fiber yarns in the premix and the polymer polyol, the formed polyurethane composite material can have the glass fiber yarns which are staggered and laminated, so that the condition that the pultruded profile is torn along the longitudinal direction of the pultruded profile under the condition of pressure is effectively avoided, and the strength of the pultruded profile is improved.
Reference is made to the following table for the effect of different compositions of the glass fiber yarns on the bending strength of the frame of the photovoltaic module.
It can be understood that the glass fiber yarns can increase the strength of the polyurethane composite material, but when the content of the glass fiber yarns is too low (for example, in example 8), the glass fiber yarns are not laminated in the polyurethane composite material in a staggered manner, and therefore, the bending strength is not effectively improved; when the content of the glass fiber yarn is too high (for example, 10), the glass fiber yarn occupies a main body and is not favorable for forming a pultruded profile in which the polyurethane composite is a substrate. Therefore, the content of the glass fiber yarns needs to be selected in combination with the actual situation so as to meet the requirement of improving the strength of the polyurethane composite material and be beneficial to forming a pultrusion profile taking the polyurethane composite material as a base.
And step S4: the photovoltaic module frame is assembled by the long frame and the short frame through the corner connectors, and dispersed modified reinforcing particles are arranged in the photovoltaic module frame. The modified reinforcing particles dispersed in the photovoltaic assembly can have corrosion resistance, ageing resistance, insulation or flame retardant property, so that the corrosion resistance, ageing resistance, insulation or flame retardant property of the photovoltaic assembly frame is improved, and the modified reinforcing particles are dispersed in the photovoltaic assembly frame, so that the stress born by part of the photovoltaic assembly frame can be dispersed, and the service strength of the photovoltaic assembly frame is improved.
With reference to the following table, the flame retardant performance of the photovoltaic module frame changes when the reinforcing particles are added and when the reinforcing particles are not added. In the present embodiment, the reinforcing particles are taken as the flame retardant particles, and do not limit the reinforcing particles, and the reinforcing particles may also be particles having corrosion resistance, aging resistance, or insulating properties. In this embodiment, the flame retardant property of the photovoltaic module frame is obtained by a UL94HB standard test.
According to the table, when the reinforcing particles are the flame-retardant particles, the flame retardant property of the photovoltaic module frame added with the flame-retardant particles is obviously higher than that of the photovoltaic module frame without the flame-retardant particles, and the reinforcing particles with the flame retardant property can increase the flame retardant property of the photovoltaic module frame.
According to the preparation method of the photovoltaic module frame provided by the embodiment of the disclosure, the reinforcing particles are added into the isocyanate, so that the isocyanate and the reinforcing particles can react to obtain the premix with the modified reinforcing particles, and then the premix and the polymer polyol are injected into the pultrusion die with the glass fiber yarns for reaction, curing and forming, so that the photovoltaic module frame with the modified reinforcing particles uniformly dispersed therein is obtained, wherein the reinforcing particles can have corrosion resistance, ageing resistance, insulation or flame retardant properties, so that the modified reinforcing particles are dispersed in the photovoltaic module frame, the corrosion resistance, ageing resistance, insulation or flame retardant properties of the photovoltaic module frame can be improved, and the dispersed reinforcing particles can properly disperse stress on the photovoltaic module frame, and the strength of the photovoltaic module frame is properly increased. In addition, the modified reinforcing particles are polymer particles obtained after the end groups of the reinforcing particles react with isocyanate, and as the modified particles react with the isocyanate, a part of the isocyanate can be consumed, so that the using amount of the isocyanate is increased, the content of the isocyanate in the formed polyurethane composite material is increased, the R value of the corresponding polyurethane composite material is increased, and when the polymer polyol with a higher hydroxyl value is selected, the using amount proportion of the isocyanate is increased, so that the increase of the number of hard segments in the polyurethane composite material can be facilitated, and the strength of the cured polyurethane is higher. Through mixing premix and polymer polyol and injecting to the crowded drawing mould of placing the fine yarn of glass in the completion solidification to draw fashioned pultrusion section bar from crowded drawing mould export through draw gear, further cut into the long frame and the short frame that are fit for the photovoltaic module size with pultrusion section bar, the rethread angle sign indicating number assembles the photovoltaic module frame with long frame and short frame, can form the photovoltaic module frame of equidimension not in order to cooperate the photovoltaic module of equidimension not, the variety of photovoltaic module preparation has been improved.
According to some embodiments of the present disclosure, another embodiment of the present disclosure provides a photovoltaic module frame, which at least can improve the performance of the photovoltaic module frame. It should be noted that, for the same or corresponding parts as those in the foregoing embodiments, reference may be made to the corresponding description of the foregoing embodiments, and detailed description will not be provided below.
Fig. 2 is a schematic structural diagram of a photovoltaic module frame according to another embodiment of the present application, and the following describes the photovoltaic module frame according to this embodiment in detail with reference to the accompanying drawings, specifically as follows:
The modified reinforcing particles 101 dispersed in the photovoltaic module frame 100 can have corrosion resistance, ageing resistance, insulation or flame retardant properties, so that the corrosion resistance, ageing resistance, insulation or flame retardant properties of the photovoltaic module frame 100 are improved, and the modified reinforcing particles 101 dispersed in the photovoltaic module frame 100 can disperse the stress to be borne by part of the photovoltaic module frame 100, so that the use strength of the photovoltaic module frame 100 is improved.
It should be noted that, in the drawings provided in this embodiment, the shape of the cross section of the photovoltaic module frame does not limit the shape of the photovoltaic module frame in this embodiment, and it can be understood that the shape of the photovoltaic module frame can be designed and modified accordingly according to the photovoltaic module to be matched with.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of the practice of the disclosure, and that various changes in form and detail may be made therein without departing from the spirit and scope of the disclosure.
Claims (10)
1. A preparation method of a photovoltaic module frame is characterized by comprising the following steps:
weighing raw materials, wherein the raw materials comprise reinforcing particles, isocyanate, polymer polyol and glass fiber yarns;
adding the reinforcing particles into the isocyanate, and stirring for reaction to obtain a premix, wherein the premix comprises modified reinforcing particles, and the modified reinforcing particles are polymer particles of which the reinforcing particles are blocked by the isocyanate;
mixing the premix and the polymer polyol, injecting the mixture into a pultrusion die in which the glass fiber yarns are placed to finish curing, pulling out a formed pultruded profile from an outlet of the pultrusion die through a traction device, and cutting the pultruded profile into a long frame and a short frame which are suitable for the size of a photovoltaic module;
and assembling the long frame and the short frame into the photovoltaic assembly frame through corner connectors, wherein the photovoltaic assembly frame is internally provided with the dispersed modified reinforcing particles.
2. The method of claim 1, wherein the reinforcing particles comprise polyphenylene ether particles.
3. The method for preparing the photovoltaic module frame according to claim 1, wherein the diameter of the reinforcing particles is 6-40 μm.
4. The preparation method of the photovoltaic module frame according to claim 1, wherein the raw materials comprise, by mass: 1-3 parts of reinforcing particles, 5-10 parts of isocyanate, 10-20 parts of polymer polyol and 70-80 parts of glass fiber yarn.
5. The preparation method of the photovoltaic module frame according to claim 1, wherein the reaction conditions for adding the reinforcing particles into the isocyanate and stirring for reaction to obtain the premix are as follows: the stirring temperature is 20-25 ℃, and the stirring time is 0.5-1 hour.
6. The method for preparing the photovoltaic module frame according to claim 1, wherein the step of mixing the premix and the polymer polyol and injecting the mixture into a pultrusion die on which the glass fiber yarn is placed to complete curing further comprises the steps of: and releasing the glass fiber yarn through a yarn releasing device, finishing the yarn through a yarn threading die, and guiding the yarn into the extruding and drawing die through a guiding device, wherein the premix and the polymer polyol are used for soaking the glass fiber yarn.
7. The method for preparing the photovoltaic module border according to claim 1, wherein the raw materials further comprise: an auxiliary agent including at least one of an antioxidant, an ultraviolet absorber, a light stabilizer, a water absorbent, a moisture dispersant, a defoaming agent, or a mold release agent;
before mixing and injecting the premix and the polymer polyol into a pultrusion die where the glass fiber yarns are placed and completing solidification, the method further comprises the following steps: adding the auxiliary agent into the polymer polyol and stirring uniformly.
8. The method of claim 1, wherein the isocyanate comprises at least one of toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, and dicyclohexylmethane-4, 4' -diisocyanate; the polymer polyol includes at least one of polyether polyol and polyester polyol.
9. The method for preparing the photovoltaic module frame according to claim 1, wherein the temperature of the pultrusion die is 60-80 ℃; the traction speed of the traction device is 1.0-3.0 m/min.
10. The utility model provides a photovoltaic module frame which characterized in that includes: the composite material is prepared by compounding 1-3 parts by mass of modified reinforcing particles, 5-10 parts by mass of isocyanate, 10-20 parts by mass of polymer polyol and 70-80 parts by mass of glass fiber yarn, wherein the terminal group of the modified reinforcing particles is the isocyanate, and the modified reinforcing particles are uniformly dispersed in the photovoltaic module frame.
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| CN202211576223.3A CN115816877A (en) | 2022-12-08 | 2022-12-08 | Photovoltaic module frame and preparation method thereof |
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