CN116330772A - Pultrusion profile for photovoltaic module frame, preparation method of pultrusion profile and photovoltaic module frame - Google Patents
Pultrusion profile for photovoltaic module frame, preparation method of pultrusion profile and photovoltaic module frame Download PDFInfo
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- CN116330772A CN116330772A CN202310216739.5A CN202310216739A CN116330772A CN 116330772 A CN116330772 A CN 116330772A CN 202310216739 A CN202310216739 A CN 202310216739A CN 116330772 A CN116330772 A CN 116330772A
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Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S30/00—Structural details of PV modules other than those related to light conversion
- H02S30/10—Frame structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/523—Pultrusion, i.e. forming and compressing by continuously pulling through a die and impregnating the reinforcement in the die
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/12—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by the relative arrangement of fibres or filaments of different layers, e.g. the fibres or filaments being parallel or perpendicular to each other
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- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2457/00—Electrical equipment
- B32B2457/12—Photovoltaic modules
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
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Abstract
The embodiment of the application relates to the technical field of solar cells, in particular to a pultrusion profile for a photovoltaic module frame, a preparation method thereof and the photovoltaic module frame, wherein the pultrusion profile for the photovoltaic module frame comprises: a resin layer; a longitudinal reinforcing layer coated in the resin layer and at least one transverse reinforcing layer; wherein the longitudinal reinforcing layer comprises a plurality of unidirectional glass fiber bundles extending along the same direction; the transverse reinforcing layer comprises reinforcing glass fiber bundles wound on the outer surface of the longitudinal reinforcing layer, and the winding direction of the reinforcing glass fiber bundles is different from the extending direction of the unidirectional glass fiber bundles. The pultrusion profile for the photovoltaic module frame is favorable for improving the strength of the photovoltaic module frame.
Description
Technical Field
The embodiment of the application relates to the field of solar cells, in particular to a pultrusion profile for a photovoltaic module frame, a preparation method of the pultrusion profile and the photovoltaic module frame.
Background
The photovoltaic module frame is used as a component of the photovoltaic module and used for fixing and sealing the photovoltaic laminated piece, and also plays a role in protecting the photovoltaic module, so that the photovoltaic module is prevented from being corroded or damaged by wind power. Therefore, the strength of the profile for forming the photovoltaic module frame plays a dominant role in the strength of the photovoltaic module frame.
However, the photovoltaic module frame prepared by the current profile is poor in strength.
Disclosure of Invention
The embodiment of the application provides a pultrusion profile for a photovoltaic module frame, a preparation method thereof and the photovoltaic module frame, which are at least beneficial to improving the strength of the photovoltaic module frame.
The embodiment of the application provides a pultrusion profile for a photovoltaic module frame, which comprises the following components: a resin layer; a longitudinal reinforcing layer and a transverse reinforcing layer coated in the resin layer; wherein the longitudinal reinforcement layer comprises unidirectional glass fiber bundles extending in the same direction; the transverse reinforcing layer comprises reinforcing glass fiber bundles wound on the outer surface of the longitudinal reinforcing layer, and the winding direction of the reinforcing glass fiber bundles is different from the extension direction of the unidirectional glass fiber bundles.
In addition, the transverse reinforcing layer comprises a plurality of circles of reinforcing glass fiber bundles wound in the same winding direction, and two adjacent circles of reinforcing glass fiber bundles are closely distributed.
In addition, the transverse reinforcing layer comprises a plurality of circles of reinforcing glass fiber bundles wound in the same winding direction, and a gap is reserved between every two adjacent circles of reinforcing glass fiber bundles.
In addition, the transverse reinforcing layers are multiple, the number of the multiple transverse reinforcing layers is not more than 5, and the winding directions of the reinforcing glass fiber bundles in different transverse reinforcing layers are the same.
In addition, the transverse reinforcing layers are multiple, the number of the multiple transverse reinforcing layers is not more than 5, and the winding directions of the reinforcing glass fiber bundles of at least two transverse reinforcing layers are different.
In addition, the volume ratio of the transverse reinforcing layer to the longitudinal reinforcing layer is: 1:4-1:9.
In addition, the unidirectional glass fiber bundles include glass fiber yarns, glass fibers and glass fiber mats, and the reinforcement glass fiber bundles include glass fiber yarns, glass fibers and glass fiber mats, and the unidirectional glass fiber bundles have the same width dimension as the reinforcement glass fiber bundles.
Correspondingly, the embodiment of the application also provides a photovoltaic module frame, which is obtained by adopting the pultrusion profile for the photovoltaic module frame.
Correspondingly, the embodiment of the application also provides a preparation method of the pultruded profile for the photovoltaic module frame, which comprises the following steps: forming a longitudinal reinforcing layer consisting of unidirectional glass fiber bundles extending in the same direction; winding reinforcing glass fiber bundles on the outer surface of the longitudinal reinforcing layer to form a transverse reinforcing layer, wherein the winding direction of the reinforcing glass fiber bundles is different from the extending direction of the unidirectional glass fiber bundles; adding the longitudinal reinforcing layer and the transverse reinforcing layer into a molding die filled with resin; and (c) drawing the extrusion molded pultruded profile from the outlet of the molding die, wherein the pultruded profile comprises the longitudinal reinforcing layer, the transverse reinforcing layer and the resin coating the transverse reinforcing layer and the longitudinal reinforcing layer.
In addition, the method of forming the lateral enhancement layer includes: and winding a single reinforced glass fiber bundle around the outer surface of the longitudinal reinforcing layer in the same winding direction for a plurality of circles, wherein the transverse reinforcing layer is formed by the plurality of circles of reinforced glass fiber bundles.
In addition, the number of the transverse reinforcing layers is multiple, a plurality of the transverse reinforcing layers are stacked, and the winding direction of the reinforced glass fiber bundles of each transverse reinforcing layer is clockwise or anticlockwise.
In addition, the unidirectional glass fiber bundles comprise glass fiber yarns, glass fibers, and glass fiber mats, and the method of forming the longitudinal reinforcement layer comprises: and putting the glass fiber yarns, the glass fibers and the glass fiber mats through a yarn putting device, and finishing yarns through a yarn threading die to prepare the longitudinal reinforcing layer.
The technical scheme provided by the embodiment of the application has at least the following advantages:
in the technical scheme of the pultrusion profile for the photovoltaic module frame, the longitudinal reinforcing layer is arranged and comprises a plurality of unidirectional glass fiber bundles extending along the same direction, so that the strength of the pultrusion profile for the photovoltaic module frame in the longitudinal direction is improved. The outer surface of the longitudinal reinforcing layer is wound with the reinforced glass fiber bundles to form the transverse reinforcing layer, and the winding direction is different from the extension direction of the unidirectional glass fiber bundles, so that the force applied to the reinforced glass fiber bundles and the unidirectional glass fiber bundles by the pultrusion profile for the frame of the photovoltaic module in different directions can be applied, and the strength of the pultrusion profile for the frame of the photovoltaic module in different directions can be enhanced. Therefore, after the photovoltaic module frame is formed by pultrusion of the pultrusion section bar for the photovoltaic module frame, the strength of the photovoltaic module frame in the longitudinal direction and the transverse direction is improved, and the integral strength of the photovoltaic module frame can be improved.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, which are not to be construed as limiting the embodiments unless specifically indicated otherwise.
Fig. 1 is a simplified schematic structural diagram of a pultruded profile for a photovoltaic module frame according to an embodiment of the present application;
fig. 2 is a schematic top view of a first pultruded profile for a photovoltaic module frame according to an embodiment of the present application;
fig. 3 is a schematic top view of a second pultruded profile for a photovoltaic module frame according to an embodiment of the present application;
fig. 4 is a schematic top view of a third pultruded profile for a photovoltaic module frame according to an embodiment of the present application;
fig. 5 is a schematic top view of a pultruded profile for a fourth photovoltaic module according to an embodiment of the present application;
fig. 6 is a schematic cross-sectional structure of a pultruded profile for a frame of a fifth photovoltaic module according to an embodiment of the present application;
fig. 7 is a schematic cross-sectional structure of a photovoltaic module frame according to another embodiment of the present disclosure;
fig. 8 is a schematic flow chart of a method for preparing a pultruded profile for a photovoltaic module frame according to another embodiment of the present application.
Detailed Description
The background art shows that the strength of the photovoltaic module frame prepared by adopting the existing pultrusion profile for the photovoltaic module frame is poor.
The embodiment of the application provides a pultrusion profile for a photovoltaic module frame, wherein a longitudinal reinforcing layer comprises a plurality of unidirectional glass fiber bundles extending along the same direction, and the strength of the pultrusion profile for the photovoltaic module frame in the longitudinal direction is improved. The outer surface of the longitudinal reinforcing layer is wound with the reinforced glass fiber bundles to form the transverse reinforcing layer, and the winding direction is different from the extension direction of the unidirectional glass fiber bundles, so that the reinforced glass fiber bundles and the unidirectional glass fiber bundles can respectively disperse the forces applied to the pultrusion profiles for the photovoltaic module frame in different directions, and further the strength of the pultrusion profiles for the photovoltaic module frame in different directions is enhanced. Therefore, after the pultrusion section bar for the photovoltaic module frame is prepared into the photovoltaic module frame, the strength of the photovoltaic module frame in the longitudinal direction and the transverse direction is improved, and the integral strength of the photovoltaic module frame can be improved.
Embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, as will be appreciated by those of ordinary skill in the art, in the various embodiments of the present application, numerous technical details have been set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments.
Fig. 1 is a simplified schematic structural diagram of a pultruded profile for a photovoltaic module frame according to an embodiment of the present application.
Referring to fig. 1, a pultruded profile for a photovoltaic module frame includes: a resin layer 101; longitudinal reinforcement layers and transverse reinforcement layers wrapped in the resin layer 101. Wherein the longitudinal reinforcement layer comprises a plurality of unidirectional glass fiber bundles 11 extending in the same direction. The lateral reinforcement layer includes reinforcing glass fiber bundles 12 wound around the outer surface of the longitudinal reinforcement layer, and the winding direction of the reinforcing glass fiber bundles 12 is different from the extending direction of the unidirectional glass fiber bundles 11.
The resin layer 101 plays a role in bonding the longitudinal reinforcing layer and the transverse reinforcing layer, the material of the resin layer 101 is resin, and after the resin is cured, the shape of the longitudinal reinforcing layer and the shape of the transverse reinforcing layer can be bonded, so that the longitudinal reinforcing layer and the transverse reinforcing layer have fixed shapes, and the longitudinal reinforcing layer and the transverse reinforcing layer are guaranteed to play a better role in dispersing external force.
In some embodiments, the material of the resin layer 101 may be a polyurethane resin, which is a polymer of isocyanate and polyol, the isocyanate being at least one selected from toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, and dicyclohexylmethane-4, 4' -diisocyanate; the polyol is at least one selected from polyether polyol and polyester polyol.
In some embodiments, in order to improve mechanical properties of the frame profile and prevent yellowing of the frame profile, an antioxidant, an ultraviolet absorber, a light stabilizer, a water absorbent, a wetting dispersant, a defoaming agent, a mold release agent, and the like may be added to the polyurethane resin.
In some embodiments, the antioxidant may be any of a phenolic, phosphite or ketone antioxidant.
In some embodiments, the ultraviolet light absorber may be a ketone or triazole type ultraviolet light absorber.
In some embodiments, the light stabilizer may be any of an ester or phosphite light stabilizer.
In some embodiments, the water absorbing agent is a molecular sieve type water absorbing agent.
In the longitudinal reinforcement layer, the unidirectional glass fiber bundles 11 extend towards the same direction, and external force applied to the longitudinal reinforcement layer can be conducted along the extending direction of the unidirectional glass fiber bundles 11, so that the applied external force is dispersed in the extending direction of the unidirectional glass fiber bundles 11, the bearing capacity of the external force is improved, and the strength of the photovoltaic module frame prepared from the pultrusion profile for the photovoltaic module frame is improved.
In some embodiments, in the longitudinal reinforcement layer, the extension direction of the unidirectional glass fiber bundles 11 is the longitudinal direction of a frame profile (for convenience of description, herein and hereinafter, a pultruded profile for a photovoltaic module frame is simply referred to as a frame profile) to enhance the longitudinal strength of the profile. In some embodiments, among the unidirectional glass fiber bundles 11 extending in the same direction, different unidirectional glass fiber bundles 11 may be staggered, which only needs to satisfy that the extending directions of the unidirectional glass fiber bundles 11 are the same.
In some embodiments, unidirectional glass fiber bundles 11 include glass fiber yarns, glass fibers, and glass fiber mats.
In the unidirectional glass fiber bundles 11, the glass fiber yarns may be stacked alternately, the glass fibers may be densely arranged between the glass fiber yarns, and the glass fiber mat may be located at the outermost side, i.e., the glass fiber mat covers the glass fiber yarns as well as the glass fibers, so that the glass fiber mat is located at the peripheral area in the cross section of the frame profile at any cross section of the frame profile.
Because glass fiber yarns can be staggered and laminated in the section bar, the situation that the frame section bar is torn along the longitudinal direction of the frame section bar under the condition of being pressed can be avoided, and the transverse strength of the section bar is improved.
In some embodiments, the rim profile comprises, in parts by mass: 20-30 parts of polyurethane resin, 30-60 parts of glass fiber yarns, 5-25 parts of glass fibers and 5-20 parts of glass fiber mats.
In some embodiments, unidirectional glass fiber bundles 11 may be obtained by raveling glass fiber yarns, glass fibers, and glass fiber mats through a ravel-out device, followed by a ravel-out die.
In some embodiments, chopped glass fibers may also be included in unidirectional glass fiber bundles 11, which may improve the transverse strength of the profile. In some embodiments, if the unidirectional glass fiber bundles 11 further comprise chopped glass fibers, the frame profile comprises, in parts by mass: 20-30 parts of polyurethane resin, 30-60 parts of glass fiber yarn, 5-25 parts of glass fiber, 5-20 parts of glass fiber felt and 1-10 parts of chopped glass fiber.
In some embodiments, unidirectional glass fiber bundles 11 may also include only glass fibers.
The reinforcing glass fiber bundles 12 are wound around the outer surface of the longitudinal reinforcing layer to form a transverse reinforcing layer, and external forces applied to the transverse reinforcing layer can be conducted along the winding direction of the reinforcing glass fiber bundles 12, so that the external forces are dispersed in the winding direction of the reinforcing glass fiber bundles 12. Because the winding direction of the reinforced glass fiber bundles 12 is different from the extending direction of the unidirectional glass fiber bundles 11, the transverse reinforcing layer and the longitudinal reinforcing layer are respectively dispersed in different directions to the external force, so that the bearing capacity of the pultrusion profile for the photovoltaic module frame to the external force is improved, the strength of the pultrusion profile for the photovoltaic module frame is improved, and the photovoltaic module frame prepared from the pultrusion profile for the photovoltaic module frame has higher strength.
Referring to fig. 2, in some embodiments, the angle θ between the winding direction of the reinforcing glass fiber bundles 12 and the extending direction of the unidirectional glass fiber bundles 11 is 30 ° to 150 °, for example, 30 ° to 35 °, 35 ° to 45 °, 45 ° to 60 °, 60 ° to 75 °, 75 ° to 80 °, 80 ° to 90 °, 90 ° to 95 °, 95 ° to 105 °, 105 ° to 120 °, 120 ° to 130 °, 130 ° to 145 °, 145 ° to 155 °, 155 ° to 170 °, 170 ° to 180 °. In the range, the transverse reinforcing layer and the longitudinal reinforcing layer can better disperse external forces applied to the frame section bar in different directions, and the strength of the frame assembly is improved.
In a specific example, the included angle θ between the winding direction of the reinforcing glass fiber bundles 12 and the extending direction of the unidirectional glass fiber bundles 11 may be a right angle, so that the external force applied to the frame profile is dispersed in the longitudinal direction and the transverse direction perpendicular to the longitudinal direction, which is favorable for better dispersing the external force, and further improves the strength of the frame profile.
It will be appreciated that in a practical process, there may be a slight gap in the winding direction of the different reinforcing glass fiber bundles 12 in the transverse reinforcing layer due to process variations, for example, a gap of 0 ° to 5 ° may be formed between the winding direction of the different reinforcing glass fiber bundles 12 and the extending direction of the same unidirectional glass fiber bundle 11.
Referring to fig. 2, in some embodiments, the transverse reinforcement layer includes a plurality of windings of reinforcing glass fiber bundles 12 wound in the same winding direction, and adjacent windings of reinforcing glass fiber bundles 12 may be closely spaced. That is, in the transverse reinforcement layer, the number of windings of the reinforcing glass fiber bundles 12 is large, so that the arrangement density of the reinforcing glass fiber bundles 12 is large, and each reinforcing glass fiber bundle 12 can conduct force, so that the force is dispersed, and the overall strength of the frame cavity is improved.
Referring to fig. 3, in some embodiments, the transverse reinforcement layer includes a plurality of turns of reinforcing glass fiber bundles 12 wound in the same winding direction, and adjacent turns of reinforcing glass fiber bundles 12 may also have a gap therebetween. That is, the arrangement of the reinforcing glass fiber bundles 12 is sparse, so that the resin can penetrate between two adjacent circles of reinforcing glass fiber bundles 12 in the actual process of forming the resin layer 101, and the shape of the transverse reinforcing layer and the shape of the longitudinal reinforcing layer can be well shaped after the resin is solidified.
It will be appreciated that in some embodiments, some of the reinforcing glass fiber bundles 12 of the transverse reinforcing layer may have a gap between adjacent turns of reinforcing glass fiber bundles 12, and other of the reinforcing glass fiber bundles 12 may have a close arrangement between adjacent turns of reinforcing glass fiber bundles 12. That is, in the same transverse reinforcing layer, not only the tightly arranged reinforcing glass fiber bundles 12 but also the sparse reinforcing glass fiber bundles 12 can be arranged, and the arrangement mode of the reinforcing glass fiber bundles 12 is not specifically limited, and only the fact that the winding direction of the reinforcing glass fiber bundles 12 is different from the extension direction of the unidirectional glass fiber bundles 11 is required.
In the embodiment of the present application, the reinforcing glass fiber bundles 12 in each lateral reinforcing layer are arranged at intervals along the extending direction of the unidirectional glass fiber bundles 11.
In some embodiments, the number of transverse reinforcement layers may be 1, that is, in a plurality of turns of reinforcing glass fiber bundles 12 wound around the outer surface of the longitudinal reinforcement layer, each turn of reinforcing glass fiber bundles 12 is arranged at intervals along the extending direction of the unidirectional glass fiber bundles 11.
Referring to fig. 4 and 5, in some embodiments, the number of lateral enhancement layers may also be multiple layers. In some embodiments, multiple transverse reinforcement layers are stacked in a direction perpendicular to the direction of extension of unidirectional glass fiber bundles 11, with the reinforcement glass fiber bundles 12 of one layer being wound around the surface of the other transverse reinforcement layer in two adjacent transverse reinforcement layers.
Referring to fig. 6, in some embodiments, the reinforcing glass fiber bundles 12 forming each lateral reinforcing layer may be continuous glass fiber bundles, i.e., wound by one continuous reinforcing glass fiber bundle 12, forming multiple turns of reinforcing glass fiber bundles 12. Based on this, in some embodiments, if there is a gap between two adjacent turns of reinforcing glass fiber bundles 12, at least one turn of reinforcing glass fiber bundles 12 of one lateral reinforcing layer may be wound between two adjacent turns of reinforcing glass fiber bundles 12 of the other lateral reinforcing layer. That is, the multiple lateral reinforcement layers may not be stacked. The reinforcing glass fiber bundles of fig. 4 to 6 having different filling patterns respectively belong to the transverse reinforcing layers of the different layers.
Referring to fig. 4, in some embodiments, the lateral reinforcement layers have multiple layers, each comprising bundles of reinforcing glass fibers wound in the same direction in multiple turns. In the multi-layer transverse reinforcing layer, the winding directions of the reinforcing glass fiber bundles 12 of at least two layers of transverse reinforcing layers can be different, for example, in the actual winding step, the winding direction of the reinforcing glass fiber bundles 12 of one layer of transverse reinforcing layer is clockwise, and the winding and unwinding box of the reinforcing glass fiber bundles 12 of the other layer of transverse reinforcing layer is counterclockwise, namely, the winding directions of the reinforcing glass fiber bundles 12 in the two layers of transverse reinforcing layer are opposite, so that the transverse reinforcing layers with opposite winding directions can respectively disperse external force along two opposite directions, and the strength of the frame profile is further improved.
In some embodiments, the winding direction of the reinforcing glass fiber bundles, in which only two lateral reinforcing layers are disposed, may be different, and the two lateral reinforcing layers that are different in winding direction may or may not be adjacent.
In some embodiments, it may also be meant that the winding direction of the reinforcing glass fiber bundles of two or more transverse reinforcing layers is different. For example, if there are 5 transverse reinforcing layers, two transverse reinforcing layers may be provided with a counterclockwise winding direction, and the winding directions of the remaining three transverse reinforcing layers may be clockwise.
Referring to fig. 5, in some embodiments, the winding direction of the reinforcing glass fiber bundles 12 in different transverse reinforcing layers may also be the same in multiple transverse reinforcing layers. In this manner, it is advantageous to simplify the process of actually forming the lateral reinforcing layers, for example, in the process of actually forming the plurality of lateral reinforcing layers, the reinforcing glass fiber bundles 12 of each lateral reinforcing layer may be wound in a clockwise direction or may be wound in a counterclockwise direction.
Considering that the weight of the photovoltaic module frame cannot be too large, the whole volume and the weight of the frame profile are required to be set, so that the number of the transverse reinforcing layers cannot be too large, and the problem that the whole volume of the frame profile is large due to the too large number of the transverse reinforcing layers is avoided. Based on this, in some embodiments, the number of lateral enhancement layers does not exceed 5 layers, which may be 2, 3, 4, or 5 layers, for example. In the range, on one hand, the number of the transverse reinforcing layers is more, the transverse strength of the frame section bar is improved better, and on the other hand, the number of the transverse reinforcing layers is not excessive, the quality of the frame section bar is kept lighter, and the frame of the light photovoltaic module is formed.
The transverse reinforcing layer is coated on the outer surface of the longitudinal reinforcing layer, external force is conducted to the longitudinal reinforcing layer through the transverse reinforcing layer, in order to enable the external force to be conducted to the longitudinal reinforcing layer quickly, the volume of the transverse reinforcing layer is required to be set so as not to be too large, and the longitudinal reinforcing layer can play a good reinforcing role in the longitudinal strength of the frame section bar. Based on this, in some embodiments, the ratio of the volumes of the transverse reinforcement layer to the longitudinal reinforcement layer is: 1:4 to 1:9, for example, can be 1:4 to 1:5, 1:5 to 1:6, 1:6 to 1:7, 1:7 to 1:8, or 1:8 to 1:9.
In the above range, compared with the longitudinal reinforcing layer, the transverse reinforcing layer has smaller volume, so that the problem of overlarge thickness of the transverse reinforcing layer covered on the outer surface of the longitudinal reinforcing layer due to overlarge volume of the transverse reinforcing layer is prevented, the external force is conducted into the longitudinal reinforcing layer more quickly through the transverse reinforcing layer, and the overall strength of the frame profile is improved. On the other hand, in the above range, the volume of the transverse reinforcing layer is not too small compared with the volume of the longitudinal reinforcing layer, so that the transverse reinforcing layer plays a role in reinforcing the transverse strength of the frame profile.
It is noted that the transverse reinforcement layer comprises only one transverse reinforcement layer, or a plurality of transverse reinforcement layers, whether only one transverse reinforcement layer or a plurality of transverse reinforcement layers, the ratio of the total volume of the transverse reinforcement layers to the volume of the longitudinal reinforcement layers being in the range of 1:4 to 1:9.
In some embodiments, the reinforcing glass fiber bundles 12 include glass fiber yarns, glass fibers, and glass fiber mats. That is, the longitudinal reinforcing layer and the transverse reinforcing layer are both made of the same material, which is beneficial to ensuring the singleness of materials forming the frame section bar and ensuring that the formed frame section bar has higher strength.
In some embodiments, the rim profile comprises, in parts by mass: 20-30 parts of polyurethane resin, 30-60 parts of glass fiber yarns, 5-25 parts of glass fibers and 5-20 parts of glass fiber mats.
In some embodiments, the width dimension of unidirectional glass fiber bundles 11 is the same as the width dimension of reinforcing glass fiber bundles 12. In some embodiments, if the reinforcing glass fiber bundles 12 are the same material as the unidirectional glass fiber bundles 11, the glass fiber yarns in the unidirectional glass fiber bundles 11 have a linear density of 2400-4800 g/km (gauge 2400TEX-4800TEX, i.e., weight 2400-4800 g per kilometer of glass fiber yarn), and the glass fibers have a diameter of 10-30 μm, and optionally are formed from a single ply of alkali-free glass fibers, which facilitates traction during the manufacturing process. The thickness of the glass fiber felt is 0.2-2 mm.
In the pultrusion profile for the photovoltaic module frame provided by the embodiment, the longitudinal reinforcing layer is arranged, and comprises a plurality of unidirectional glass fiber bundles 11 extending along the same direction, so that the strength of the pultrusion profile for the photovoltaic module frame in the longitudinal direction is improved. The reinforced glass fiber bundles 12 are wound on the outer surface of the longitudinal reinforced layer to form a transverse reinforced layer, and the winding direction is different from the extending direction of the unidirectional glass fiber bundles 11, so that the reinforced glass fiber bundles 12 and the unidirectional glass fiber bundles 11 can disperse the forces applied to the pultruded profiles for the photovoltaic module frame in different directions, and the strength of the pultruded profiles for the photovoltaic frame in different directions is further enhanced. Therefore, after the pultrusion section bar for the photovoltaic module frame is prepared into the photovoltaic module frame, the strength of the photovoltaic module frame in the longitudinal direction and the transverse direction is improved, and the integral strength of the photovoltaic module frame can be improved.
Correspondingly, the embodiment of the application also provides a photovoltaic module frame, which is obtained by pultrusion of the pultrusion section bar for the photovoltaic module frame provided by the embodiment.
Fig. 7 is a schematic cross-sectional structure of a photovoltaic module frame according to an embodiment of the disclosure. As shown in fig. 7, the photovoltaic module frame includes: the first limiting part 21, the first side edge part 22 and the top bearing part 23 are sequentially connected to form the accommodating groove 20, and the accommodating groove 20 is used for installing the photovoltaic module laminated piece. The photovoltaic module frame also includes: the second side edge portion 25 and the bottom bearing portion 26, wherein the second side edge portion is connected with one end of the top bearing portion 23 away from the first side edge portion 22, the top bearing portion 23, the second side edge portion 25 and the bottom bearing portion 26 are sequentially combined to form a cavity 30, and an opening direction of the cavity 30 is opposite to an opening direction of the accommodating groove 20.
It should be noted that the pultruded profile for a photovoltaic module frame provided in the embodiments of the present application may be used to prepare photovoltaic module frames with various shapes, and the photovoltaic module frame provided in fig. 7 is only an example.
Correspondingly, the embodiment of the application also provides a preparation method of the pultruded profile for the photovoltaic module frame, referring to fig. 8, comprising the following steps:
a longitudinal reinforcing layer is formed, which is composed of a plurality of unidirectional glass fiber bundles 11 (refer to fig. 1) extending in the same direction.
In the longitudinal reinforcement layer, each unidirectional glass fiber bundle 11 extends towards the same direction, and the external force received by the longitudinal reinforcement layer can be conducted along the extending direction of the unidirectional glass fiber bundles 11, so that the received external force is dispersed in the extending direction of the unidirectional glass fiber bundles 11, the bearing capacity of the external force is improved, and the strength of the photovoltaic module frame prepared by the pultrusion profile for the photovoltaic module frame is improved.
In some embodiments, unidirectional glass fiber bundles 11 comprise glass fiber yarns, glass fibers, and glass fiber mats, and the method of forming the longitudinal reinforcement layer comprises: and (3) putting the glass fiber yarns, the glass fibers and the glass fiber mats through a yarn putting device, and finishing yarns through a yarn threading die 102 to prepare the longitudinal reinforcing layer.
Wherein, the specification of the glass fiber yarn is 4800TEX; the whole stranded alkali-free glass fiber is adopted, and the diameter of a single glass fiber is 20 mu m; the thickness of the glass fiber mat was 1mm.
In some embodiments, the longitudinal reinforcing layer comprises, in parts by mass: 30-60 parts of glass fiber yarn, 5-25 parts of glass fiber and 5-20 parts of glass fiber felt.
After the longitudinal reinforcement layer is formed, the reinforcing glass fiber bundles 12 (refer to fig. 1) are wound on the outer surface of the longitudinal reinforcement layer to form a transverse reinforcement layer, wherein the winding direction of the reinforcing glass fiber bundles 12 is different from the extending direction of the unidirectional glass fiber bundles 11, so that the transverse reinforcement layer and the longitudinal reinforcement layer respectively disperse external forces in different directions, the bearing capacity of the pultrusion profile for the photovoltaic module frame to the external forces is improved, the strength of the pultrusion profile for the photovoltaic module frame is improved, and the photovoltaic module frame prepared by the pultrusion profile for the photovoltaic module frame has higher strength.
In some embodiments, a method of forming a lateral enhancement layer includes: the single reinforcing glass fiber bundles 12 are wound around the outer surface of the longitudinal reinforcing layer in the same winding direction for a plurality of turns, and the plurality of turns of reinforcing glass fiber bundles 12 form the transverse reinforcing layer.
In some embodiments, the transverse reinforcement layer comprises a plurality of turns of reinforcing glass fiber bundles 12 wound in the same winding direction, and two adjacent turns of reinforcing glass fiber bundles 12 may be closely spaced.
In some embodiments, the transverse reinforcement layer comprises a plurality of turns of reinforcing glass fiber bundles 12 wound in the same winding direction, and adjacent turns of reinforcing glass fiber bundles 12 may also have a gap therebetween.
In some embodiments, a portion of the reinforcing glass fiber bundles 12 of the transverse reinforcing layer may have a gap between two adjacent turns of the reinforcing glass fiber bundles 12, and the remaining portions of the reinforcing glass fiber bundles 12 may be closely spaced between two adjacent turns of the reinforcing glass fiber bundles 12.
In some embodiments, the included angle between the winding direction of the reinforcing glass fiber bundles 12 and the extending direction of the unidirectional glass fiber bundles 11 is 30 ° to 150 °, for example, 30 ° to 35 °, 35 ° to 45 °, 45 ° to 60 °, 60 ° to 75 °, 75 ° to 80 °, 80 ° to 90 °, 90 ° to 95 °, 95 ° to 105 °, 105 ° to 120 °, 120 ° to 130 °, 130 ° to 145 °, 145 ° to 155 °, 155 ° to 170 °, 170 ° to 180 °. It will be appreciated that due to process variations, there may be a slight gap in the winding direction of the different reinforcing glass fiber bundles 12 in the transverse reinforcement layer, for example, a gap of 0 to 5 between the winding direction of the different reinforcing glass fiber bundles 12 and the direction of extension of the same unidirectional glass fiber bundle 11.
In some embodiments, the number of transverse reinforcement layers may be one, that is, a single ply of the individual reinforcing glass fiber bundles 12 is wrapped, one end of the individual reinforcing glass fiber bundles 12 is secured to one end of the longitudinal reinforcement layer, and then the reinforcing glass fiber bundles 12 are wrapped around one turn. The adjacent two turns of the reinforcing glass fiber bundles 12 may be closely aligned or there may be a gap between the adjacent two turns of the reinforcing glass fiber bundles 12.
In some embodiments, the number of lateral reinforcement layers is a plurality of layers, the plurality of layers being stacked, with a previous layer of lateral reinforcement layer being wrapped around the surface of a previous layer of lateral reinforcement layer. Of the plurality of transverse reinforcing layers, the winding direction of the reinforcing glass fiber bundles 12 of each transverse reinforcing layer is clockwise or counterclockwise.
Each of the transverse reinforcing layers is wound with a reinforcing glass fiber bundle 12. In some embodiments, the subsequent transverse reinforcement layer may be formed by wrapping around the surface of the previous transverse reinforcement layer, with one end of a single reinforcing glass fiber strand 12 secured to the first end of the previous transverse reinforcement layer, and then wrapping around the same. Adjacent two turns of the reinforcing glass fiber bundles 12 may be closely aligned or may have a gap therebetween.
In some embodiments, if there is a gap between two adjacent turns of reinforcing glass fiber bundles 12 of the previous layer of lateral reinforcement, at least one turn of reinforcing glass fiber bundles 12 of the next layer of lateral reinforcement may be wound between the gaps of two adjacent turns of reinforcing glass fiber bundles 12 of the previous layer of lateral reinforcement.
In some embodiments, the reinforcing glass fiber bundles 12 may be wound using a winding device 103, and the winding device 103 may include: a drive shaft extending through the winding drum. The reinforcing glass fiber bundles 12 are wound on the surface of the winding drum, the driving shaft is connected with the winding drum, and the driving shaft drives the winding drum to rotate while rotating, so that the winding drum can be driven to rotate only by rotating the driving shaft, and the reinforcing glass fiber bundles 12 wound on the surface of the winding drum are unreeled, so that the reinforcing glass fiber bundles 12 are wound on the surface of the longitudinal reinforcing layer.
In some embodiments, the reinforcing glass fiber bundles 12 may also be manually wrapped.
After the transverse reinforcing layer is prepared, preparing resin, wherein the resin can be polyurethane resin, the polyurethane resin is a polymer of isocyanate and polyalcohol, and the isocyanate is at least one of toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate and dicyclohexylmethane-4, 4' -diisocyanate; the polyol is at least one selected from polyether polyol and polyester polyol.
In some embodiments, in order to improve mechanical properties of the frame profile and prevent yellowing of the frame profile, additives such as antioxidants, ultraviolet absorbers, light stabilizers, water absorbers, wetting dispersants, defoamers, mold release agents, and the like may be added to the polyurethane resin. In some embodiments, the antioxidant may be any of a phenolic, phosphite or ketone antioxidant. In some embodiments, the ultraviolet light absorber may be a ketone or triazole type ultraviolet light absorber. In some embodiments, the light stabilizer may be any of an ester or phosphite light stabilizer. In some embodiments, the water absorbing agent is a molecular sieve type water absorbing agent.
In some embodiments, a method of preparing a resin includes: a resin premix is prepared, the resin premix is mixed with raw material isocyanate of polyurethane resin in proportion to obtain a resin, and the resin is injected into a molding die 105 through an injection molding machine 104.
In some embodiments, a method of preparing a resin premix includes: stirring and mixing polyether polyol and an additive in a stirring kettle, wherein the additive comprises the following components in parts by mass: 25 parts of polyether polyol, 0.1 part of antioxidant, 1 part of ultraviolet absorber, 1 part of light stabilizer, 1 part of water absorbent, 1 part of wetting dispersant, 1 part of defoamer and 2 parts of release agent.
The longitudinal reinforcement layer and the transverse reinforcement layer are added to a molding die 105 filled with resin, the longitudinal reinforcement layer and the transverse reinforcement layer are impregnated with the resin, and the resin, the longitudinal reinforcement layer and the transverse reinforcement layer are cured.
In some embodiments, the curing temperature may be 60 ℃ to 80 ℃. For example, the curing temperature may be 60 ℃, 62 ℃, 65 ℃, 70 ℃, 75.5 ℃, or 80 ℃.
After curing is completed, the extrusion molded pultruded profile is pulled from the outlet of the molding die, wherein the pultruded profile comprises a longitudinal reinforcing layer, a transverse reinforcing layer and a resin coating the transverse reinforcing layer and the longitudinal reinforcing layer. The pultruded profile is the pultruded profile for the photovoltaic module frame.
After the pultruded profile is obtained, the photovoltaic module frame may be cut with the pultruded profile using the slitter 106 to cut into photovoltaic module frames that fit the size of the photovoltaic laminate.
While the preferred embodiment has been described, it is not intended to limit the scope of the claims, and any person skilled in the art can make several possible variations and modifications without departing from the spirit of the invention, so the scope of the invention shall be defined by the claims.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of implementing the present application and that various changes in form and details may be made therein without departing from the spirit and scope of the present application. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention shall be defined by the appended claims.
Claims (12)
1. A pultruded profile for a photovoltaic module bezel, comprising:
a resin layer;
a longitudinal reinforcing layer and a transverse reinforcing layer coated in the resin layer; wherein the longitudinal reinforcement layer comprises unidirectional glass fiber bundles extending in the same direction; the transverse reinforcing layer comprises reinforcing glass fiber bundles wound on the outer surface of the longitudinal reinforcing layer, and the winding direction of the reinforcing glass fiber bundles is different from the extension direction of the unidirectional glass fiber bundles.
2. The pultruded profile for a photovoltaic module frame according to claim 1, wherein the transverse reinforcement layer comprises a plurality of turns of the reinforcing glass fiber bundles wound in the same winding direction, and two adjacent turns of the reinforcing glass fiber bundles are closely arranged.
3. The pultruded profile for a photovoltaic module bezel of claim 1, wherein said lateral reinforcement layer comprises a plurality of turns of said reinforcing glass fiber bundles wound in a same winding direction with a gap between adjacent turns of said reinforcing glass fiber bundles.
4. The pultruded profile for a photovoltaic module frame according to claim 1, wherein the plurality of the transverse reinforcing layers are provided, the number of the plurality of the transverse reinforcing layers is not more than 5, and the winding directions of the reinforcing glass fiber bundles in the plurality of the transverse reinforcing layers are the same.
5. The pultruded profile for a photovoltaic module frame according to claim 1, wherein the plurality of the transverse reinforcing layers is provided, the number of the plurality of the transverse reinforcing layers is not more than 5, and the winding directions of the reinforcing glass fiber bundles of at least two of the plurality of the transverse reinforcing layers are different.
6. The pultruded profile for a photovoltaic module bezel of any one of claims 1-5, wherein a volume ratio of the lateral reinforcement layer to the longitudinal reinforcement layer is: 1:4-1:9.
7. The pultruded profile for a photovoltaic module bezel of claim 1, wherein said unidirectional glass fiber bundles comprise glass fiber strands, glass fibers and glass fiber mats, said reinforced glass fiber bundles comprise glass fiber strands, glass fibers and glass fiber mats, and a width dimension of said unidirectional glass fiber bundles is the same as a width dimension of said reinforced glass fiber bundles.
8. A photovoltaic module frame, characterized in that the photovoltaic module frame according to any one of claims 1-7 is obtained by pultrusion using a pultrusion profile.
9. The preparation method of the pultruded profile for the photovoltaic module frame is characterized by comprising the following steps of:
forming a longitudinal reinforcing layer consisting of unidirectional glass fiber bundles extending in the same direction;
winding reinforcing glass fiber bundles on the outer surface of the longitudinal reinforcing layer to form a transverse reinforcing layer, wherein the winding direction of the reinforcing glass fiber bundles is different from the extending direction of the unidirectional glass fiber bundles;
adding the longitudinal reinforcing layer and the transverse reinforcing layer into a molding die filled with resin;
and (c) drawing the extrusion molded pultruded profile from the outlet of the molding die, wherein the pultruded profile comprises the longitudinal reinforcing layer, the transverse reinforcing layer and the resin coating the transverse reinforcing layer and the longitudinal reinforcing layer.
10. The method of claim 9, wherein the forming the lateral reinforcement layer comprises: and winding a single reinforced glass fiber bundle around the outer surface of the longitudinal reinforcing layer in the same winding direction for a plurality of circles, wherein the transverse reinforcing layer is formed by the plurality of circles of reinforced glass fiber bundles.
11. The method of claim 10, wherein the number of the transverse reinforcing layers is a plurality of layers, the plurality of layers of the transverse reinforcing layers are stacked, and the winding direction of the reinforcing glass fiber bundles of each of the plurality of layers of the transverse reinforcing layers is clockwise or counterclockwise.
12. The method of claim 11, wherein the unidirectional glass fiber bundles comprise glass fiber yarns, glass fibers, and glass fiber mats, and the method of forming the longitudinal reinforcement layer comprises: and putting the glass fiber yarns, the glass fibers and the glass fiber mats through a yarn putting device, and finishing yarns through a yarn threading die to prepare the longitudinal reinforcing layer.
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| CN202310216739.5A CN116330772A (en) | 2023-03-01 | 2023-03-01 | Pultrusion profile for photovoltaic module frame, preparation method of pultrusion profile and photovoltaic module frame |
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| CN202310216739.5A CN116330772A (en) | 2023-03-01 | 2023-03-01 | Pultrusion profile for photovoltaic module frame, preparation method of pultrusion profile and photovoltaic module frame |
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