CN109087962B - Packaging front plate and preparation process thereof - Google Patents

Abstract

The invention provides a packaging front plate and a preparation process thereof. The packaging front plate is a composite film attached to the upper surface of a solar cell component. It is characterized in that the composite film includes an anti-adhesive coating from top to bottom, Frosted aging-resistant layer, first film base material layer, first adhesive layer, and water vapor barrier layer. The packaging front plate of the present invention can meet the requirements of low water vapor transmission rate and low service life (less than five years) of mobile energy. At the same time, the surface of the flexible front plate is anti-fingerprint and scratch-resistant, the packaging process is simple and efficient, and the materials are The process cost is lower; the front panel of this package is lighter, thinner, and softer than the traditional front panel, and the material cost is lower and the process is simple.

Description

A kind of packaging front plate and its preparation process

Technical field

The present invention relates to a solar cell packaging component, and more specifically to a packaging front plate used in the field of flexible mobile solar cells and a preparation process thereof.

Background technique

Currently, in solar cell modules, the quality of packaging plays an important role in the service life of the battery. The closed structure of the front panel of the solar cell module is mainly used to isolate air and water vapor from penetrating into the battery module, thereby protecting the solar cell. The packaging material generally uses an adhesive film mainly composed of PVB and EVA. Its function is to fix the battery sheets and isolate air and water vapor to ensure that the battery has a long service life after being packaged. Both PVB and EVA materials have shortcomings in the comprehensive performance of solar cell sealing. The water blocking performance is not good enough. After a certain period of time, water vapor will enter the interior of the module along the edge of the battery module; at the same time, the bonding strength with the metal is not high enough. , causing the electrodes and the adhesive film to separate after the solar cell group has been used for a certain period of time, losing its encapsulation function.

In view of the shortcomings of the sealing performance of traditional solar cell packaging front plate materials, patent CN102738283A discloses a front plate packaging structure of a solar module, in which the packaging front plate structure is included on the first EVA film, using a layer of ETFE fluoroplastic film , the structure improves durability and thermal insulation. As a new type of solar cell, flexible thin film solar cells have attracted more and more attention due to their advanced technology, excellent performance and wide range of uses. Some flexible packaging front panels use fluorine film materials, which have high aging resistance and can be used outdoors for more than 25 years. However, fluorine films are expensive, and the sealing process using traditional packaging adhesive films is complicated and the yield rate is low. After the product is packaged It is thick, hard, and heavy, and does not meet the lightweight requirements of mobile energy consumer products.

Contents of the invention

In view of the problems existing in the prior art, the present invention provides a high-light package front plate structure and a preparation method to solve the above problems. The present invention has developed a packaging front plate material and disclosed its preparation process. The solar cell packaging front plate of the invention can be applied to meet the requirements of anti-fingerprint resistance, scratch resistance, low water vapor transmittance and low usage for mobile energy sources. The age requirement is less than 5 years. At the same time, the front panel is lighter in weight, thinner in thickness, and softer than the traditional front panel. The material cost is lower and the process is simple. It truly meets the requirements of lightweight and soft power generation paper.

A first aspect of the present invention provides a packaging front plate. The packaging front plate is a composite film attached to the upper surface of a solar cell module. It is characterized in that the composite film includes an anti-adhesive coating from top to bottom. layer, frosted aging-resistant layer, first film base material layer, first adhesive layer, and water vapor barrier layer.

The term "packaging front plate" used in the present invention refers to the material on the upper surface of the photovoltaic chip that plays a role in packaging protection. The packaging front plate in the present invention is actually a composite film covering the upper surface of the battery component. The film has a multi-layer structure and is composed of several material layers with the same or different properties and compositions. Each material layer can be coated with The structural forms of layers and films can be combined together through deposition, coating, lamination and other process means to form the packaging front plate of the present invention. Commonly used package front plate materials in the prior art are polymers such as PVB polyvinyl butyral resin and EVA ethylene-vinyl acetate copolymer.

The composition of the package front panel in the existing technology is relatively simple. Basically, it is one or two layers of PVB, EVA, PET or ETFE film covering the upper surface of the battery module. The degree of composite is not high, the function is relatively limited, and it cannot meet the resistance requirements of the package front panel. The comprehensive performance balance between water vapor resistance, light transmittance, chemical stability and other properties; and the preparation process of the packaging front plate film in the existing technology is complex, has high requirements on equipment, and the cost of film composition materials is high. At the same time, in the existing technical solutions, some flexible packaging front panels are laminated with fluorine film materials and packaging adhesive films. Although the fluorine film has high aging resistance and can be used outdoors for more than 25 years, the fluorine film is expensive. Moreover, the sealing process using traditional encapsulating adhesive film is complicated, the yield rate is low, and the product after encapsulation is thick, hard, and heavy, which does not meet the lightweight requirements of mobile energy consumer products.

The mobile solar cell package front panel provided by the invention has the following comprehensive performance indicators: the thickness is adjustable from 0.1-0.4mm, the light transmittance is more than 90%, and the water vapor transmittance is adjustable from 10-2g/m2day to 10-6g/m2day , the surface hardness is adjustable from 2H to 3H, the tensile strength is more than 170MPa, and the elongation at break is more than 140%. The performance of the packaging front plate of the present invention in terms of water resistance, light transmittance, weather resistance, insulation, and wear resistance is also improved compared with the existing technology.

The packaging front panel composite film of the present invention abandons the high cost and complicated process of fluorine-containing films and uses a composite layer film composed of organic and/or inorganic materials, which meets the packaging standards of highly transparent mobile battery panels.

In a further preferred solution, the lower surface of the water vapor barrier layer further includes a layer of modified primer coating, which can improve the weather resistance of the package front plate.

In a further preferred solution, the lower surface of the modified primer coating further includes a second film substrate layer. In a further preferred solution, the lower surface of the second film base material layer further includes a second adhesive layer, which can enhance light transmittance.

In a further preferred solution, the lower surface of the second adhesive layer further includes a layer of PE protective film. In a further preferred solution, the thickness of the anti-adhesive coating is 1-10um.

In a further preferred solution, the frosted aging-resistant layer has a thickness of 1-10um.

In a further preferred embodiment, the frosted aging-resistant layer contains frosted particles, and the frosted particles are organic particles, inorganic particles or a combination of both.

In a further preferred solution, the organic particles are PMMA, PBMA, and PDMS, and the inorganic particles are SiO2, Al2O3, and ZrO2.

In a further preferred solution, the thickness of the first film base material layer is 50-200um.

In a further preferred solution, the first film base material layer is a highly transparent PET film with a light transmittance of 90% or more.

In a further preferred solution, the first and second adhesive layers have a light transmittance of more than 90% and a thickness of 5-30um.

In a further preferred solution, the thickness of the water vapor barrier layer is 1-30um.

In a further preferred solution, the modified primer coating has a thickness of 1-15um, and can be selected from acrylic, polyurethane or polyester coatings.

In a further preferred solution, the second film base material layer is a highly transparent PET, PEN or PBT film with a light transmittance of more than 90% and a thickness of 50-200um.

The present invention further provides a preparation process for a packaging front plate, which is characterized in that it includes the following steps:

Step 1: Mix the frosted particles, anti-aging agent and organic polymer solution evenly, and process the upper surface of the first film substrate layer to form a dry film of a continuous frosted aging-resistant layer;

Step 2: Use the composite film prepared in Step 1 to prepare a dry film of anti-adhesive coating on the upper surface of the above dry film;

Step 3: Prepare the fluid for the first adhesive layer. Use the composite film prepared in the above step 2, and process the above fluid on the lower surface of the first film substrate layer using line coating, blade coating or roller coating to obtain the first adhesive layer. The wet film of the adhesive layer is dried at 50-100℃ for 1-5 minutes to obtain the dry film of the first adhesive layer, with a thickness of 5-30um;

Step 4: Using the composite film prepared in Step 3, a water vapor barrier layer is prepared on the lower surface of the first adhesive layer using an atomic layer deposition process or a magnetron sputtering process.

In a further preferred solution, the method further includes the following steps: coating the lower surface of the water vapor barrier layer with a wet film of the modified primer coating, and drying at a high temperature of 70-90°C to form a dry film of the modified primer coating.

In a further preferred solution, the method further includes the following step: compounding the lower surface of the dry film of the modified primer coating with a second film substrate layer.

As an alternative, the present invention also provides another packaging front plate preparation process, which is characterized in that it also includes the following steps:

Step 1: Mix the frosted particles, anti-aging agent and organic polymer solution evenly, and process the upper surface of the first film substrate layer to form a dry film of a continuous frosted aging-resistant layer;

Step 2: Use the composite film prepared in Step 1 to prepare a dry film of anti-adhesive coating on the upper surface of the above dry film;

Step 3: Prepare the fluid for the first adhesive layer. Use the composite film prepared in the above step 2, and process the above fluid on the lower surface of the first film substrate layer using line coating, blade coating or roller coating to obtain the first adhesive layer. The wet film of the agent layer is dried at 50-100°C for 1-5 minutes to obtain the dry film of the first adhesive layer;

Step 4: Provide a second film base material layer, apply a wet film of the modified primer coating on its upper surface, and form a dry film of the modified primer coating after drying at a high temperature of 70-90°C; then, The upper surface of the modified primer coating is prepared with an atomic layer deposition process or a magnetron sputtering process to prepare a water vapor barrier layer; then the composite film prepared in the above steps is laminated and combined with the composite film prepared in step 3 in sequence, and pressurized After bonding and compounding, it is rolled up for use, wherein the water vapor barrier layer is bonded to the first adhesive layer.

In a further preferred solution, a wet film of the second adhesive layer is prepared on the lower surface of the second film base material layer by spraying, blade coating or roller coating, and is dried at 50-100°C for 1-5 minutes. Finally, the second adhesive layer is obtained, with a thickness of 5-30um.

In a further preferred solution, the method further includes the following steps: compounding a PE protective film on the lower surface of the second adhesive layer and rolling it up.

In a further preferred solution, in step 1, the specific steps of forming a frosted aging-resistant dry film are: preparing a frosted coating wet film on the upper surface of the film base material layer by blade coating or roller coating, The wet film is cured after UV irradiation for 10-50 seconds at a temperature of 50-100°C to form a dry film with a continuous frosted aging-resistant layer.

In a further preferred solution, in step 1, the frosted aging-resistant layer contains frosted particles, and the frosted particles are organic particles, inorganic particles, or a combination of both; preferably, the organic particles are PMMA, PBMA, PDMS, the inorganic particles are SiO2, Al2O3, and ZrO2. More preferably, in step 1, the organic polymer solution is often one or both of acrylic and polyurethane materials.

In a further preferred solution, the modified primer coating may be an acrylic, polyurethane, polyester, etc. coating.

In a further preferred embodiment, in step 2, the specific preparation steps of the dry film of the coating are: coating a silicone oil solution on the upper surface of the dry film in step 2 by blade coating or line coating, and then Prepare a dry film of anti-stick coating after drying at high temperature of 140-160℃ in a hot oven for 1-5 minutes.

In a further preferred solution, in step 3, the preparation process of the fluid of the first adhesive layer includes: adding polymer resin, tackifying resin, plasticizer, solvent, etc. into a reaction kettle, using a high-speed mixer. Stir at 2000 rpm, mix evenly, and add the above mixed solution into the liquid storage tank of the coating equipment; preferably, the polymer resin can be polyurethane or acrylic materials.

The invention provides a packaging front plate and its preparation process, without limitation, will obtain one or more of the following beneficial effects over related technologies:

1. By curing the wet film material formed by frosted particles and anti-aging agent in a compatible polymer solution under UV radiation to form a film, the frosted aging-resistant coating is evenly covered on the high-transmittance film substrate. Protect the water vapor barrier layer and battery components at the bottom of the composite film, and improve the wear resistance, scratch resistance and aging resistance of the front plate material;

2. The surface layer of the composite film is dried and solidified with silicone oil solution to form an anti-stick coating. The process steps are simple and the coating is dense, achieving anti-stick and self-cleaning;

3. The water vapor barrier layer can make the water vapor transmittance reach 10-5g/m2/day level; the introduction of a high-transmittance adhesive layer makes this flexible front panel light, thin and soft;

4. Abandoning the traditional method of sequentially stacking layers of composite films, the present invention first composites several layers of film layers, and finally uses a high-transmittance adhesive layer as an adhesive transition layer to combine the previously composited films. Each film layer is compounded in sequence; adding tackifying resin to the high-transmittance adhesive layer can also improve the strength of bonding and compounding;

5. The flexible front plate packaging component composed of the composite film of the present invention has tight adhesion between each layer of film, a high degree of compositeness, excellent comprehensive performance, anti-fingerprint resistance, low water vapor transmission rate, stable properties, and low The cost, packaging process is simple and efficient, and the yield rate is high, which meets the service life requirements of consumer mobile energy.

Description of drawings

Figure 1 is a schematic structural diagram of a package front panel composite film according to one embodiment of the present invention.

Figure 2 is a schematic structural diagram of a package front panel composite film according to an embodiment of the present invention.

Figure 3 is a schematic structural diagram of a package front panel composite film according to an embodiment of the present invention.

The reference numbers are: 1-anti-adhesive coating, 2-frosted aging-resistant layer, 3-first film base material layer, 4-first adhesive layer, 5-water vapor barrier layer, 6-modified primer Coating, 7-second film base material layer, 8-second adhesive layer, 9-PE protective film.

Detailed ways

Below, the technical solutions and advantages of the present invention will be explained and described in more detail with reference to the accompanying drawings and specific embodiments of the description. It should be understood that the contents presented in the description, specific embodiments and drawings are only for the purpose of more clearly illustrating the technical solutions and advantages of the present invention, and do not limit the scope of protection of the present invention. Those skilled in the art can obtain modified technical solutions through various reasonable transformations based on the disclosure of the specification. As long as they do not deviate from the spirit of the present invention, various modified technical solutions are included in the protection scope of the present invention. Inside.

Example 1

This embodiment encapsulates the front plate, which is composed of a composite film that tightly covers the upper surface of the solar cell module, and is composed of multiple layers of films. Among them, 1 is an anti-stick coating with a thickness of preferably 1-10um, more preferably 3-8um, and more preferably 5um. It is distributed on the upper surface of the package front panel composite film and has anti-stick, dust-proof, and self-protection properties. Cleaning effect; 2 is a frosted anti-aging coating with a thickness of preferably 1-10um, more preferably 3-8um, more preferably 5um. The specific composition of this layer preferably contains organic or inorganic frosted particles. For example, PMMA is selected for organic particles. , PBMA, PDMS, the inorganic particles are SiO2, Al2O3, ZrO2, and more preferably contain an anti-aging agent. This layer has wear resistance, scratch resistance, and aging resistance; 3 is the first film base material layer, and the thickness is preferably 50-200um, more preferably 80-150um, more preferably 100-120um, the first film base material is preferably a highly transparent PET film, with a visible light transmittance of more than 90%, and this layer has high Light transmission; 4 is the first adhesive layer, preferably with a light transmittance of more than 95% and a thickness of 100-300um, preferably 50-200um, more preferably 80-150um, more preferably 100-120um. The layer has high light transmittance and light, thin and soft properties; 5 is a water vapor barrier layer with a thickness of 1-30um, more preferably 5-25um, more preferably 10-20um, more preferably 15um. This layer has the ability to block water vapor. role.

The package front panel composite film obtained according to the above structural arrangement is shown in Figure 1.

The preparation process of the package front plate as shown in the structure of Figure 1 includes the following steps:

Step 1: Mix the frosted particles, anti-aging agent and organic polymer solution, stir with a high-speed mixer at 2000 rpm, mix evenly, and apply on the upper surface of the first film base material layer 3 with a light transmittance greater than 90% by scraping, rolling A frosted coating wet film is prepared by common coating methods such as coating. The wet film is cured after UV irradiation for 10-50S at a temperature of 50-100°C to form a continuous frosted coating dry film, which is layer 2 in Figure 1. The frosted particles can They are organic particles such as PMMA, PBMA, and PDMS or inorganic particles such as SiO2, Al2O3, and ZrO2. The organic polymer solution is often one or two of acrylic, polyurethane, and other materials;

Step 2: Use the composite film prepared in step 1, apply silicone oil solution on the upper surface of film layer 2 by scraping, line coating, etc., and dry it in a hot oven at a high temperature of 140-160°C for 1-5 minutes to prepare an anti-stick dry film. , that is, layer 1 in Figure 1.

Step 3: Prepare the fluid for the first adhesive layer. Use the composite film prepared in the above-mentioned step 2, and process the above-mentioned fluid on the lower surface of the first film base material layer 3 by line coating, blade coating or roller coating to obtain the first adhesive. The wet film of the adhesive layer 4 is dried at 50-100°C for 1-5 minutes to obtain a dry film of the first adhesive layer, with a thickness of 5-30um; preferably, the preparation of the fluid of the first adhesive layer 4 The process includes: adding polymer resin, tackifying resin, plasticizer, solvent, etc. into the reaction kettle, stirring with a high-speed mixer at 2000 rpm, mixing evenly, and adding the above mixed solution to the liquid storage tank of the coating equipment; preferably , the polymer resin can be polyurethane or acrylic materials.

Step 4: Using the composite film prepared in Step 3, a water vapor barrier layer is prepared on the lower surface of the first adhesive layer 4 using an atomic layer deposition process or a magnetron sputtering process.

The package front panel of this embodiment includes an anti-adhesive coating 1, a frosted aging-resistant layer 2, a first film base material layer 3, a first adhesive layer 4, and a water vapor barrier layer 5 that are combined together.

By preparing a frosted anti-aging and anti-adhesive coating on a high-transmittance film substrate, the front plate material can be made wear-resistant, scratch-resistant, self-cleaning and anti-aging; by preparing a water vapor barrier layer on a high-transmission film substrate, the front plate material can be made The water vapor transmittance can reach 10-5g/m2day level; by introducing a high-transmittance adhesive layer, this flexible front panel has the characteristics of being light, thin and soft.

Example 2

In order to further improve the comprehensive performance of the packaging front panel, the following structural and process improvements can be made to the packaging front panel composite film of the present invention.

Preferably, based on the composite film structure of the encapsulated front panel in Embodiment 1, the lower surface of the water vapor barrier layer 5 is compounded with a layer of modified primer coating 6;

More preferably, the second film base material layer 7 is compounded on the lower surface of the layer 6 .

The structural diagram of the package front plate obtained in this embodiment is shown in Figure 2.

Among them, the inventor of the present invention arranged the water vapor barrier layer in the middle layer of the composite film of the package front panel. On the one hand, it can prevent the water and gas generated by the battery module from destroying the water vapor barrier layer. On the other hand, it can also prevent EVA and other substances from interacting with the solar panel. Contact causes open circuit and short circuit problems; 6 is a modified primer coating, the thickness is preferably 1-15um, more preferably 3-12um, more preferably 5-8um, this layer has weather resistance; 7 is the second film Base material layer, the second film base material layer is preferably a highly transparent PET, PEN or PBT film with a light transmittance of more than 90% and a thickness of 50-200um, more preferably 80-150um, more preferably 100um -120um, this layer has high light transmittance.

The specific preparation steps of the packaging front plate composite film of Example 2 are:

Select the encapsulating front panel composite film of Embodiment 1, which also preferably includes the following steps: coating a wet film of modified primer coating 6 on the lower surface of the water vapor barrier layer 5, and drying at a high temperature of 70-90°C to form a modified Dry film of primer coat 6;

More preferably, the method also includes the following steps: the dry film lower surface of the modified primer coating 6 is compounded with a second film base material layer 7 .

In addition, as an alternative preparation process, the specific preparation process of the packaging front plate composite film in Example 2 includes the following steps:

Step 1: Mix the frosted particles, anti-aging agent and organic polymer solution, stir with a high-speed mixer at 2000 rpm, mix evenly, and apply on the upper surface of the first film base material layer 3 with a light transmittance greater than 90% by scraping, rolling A frosted coating wet film is prepared by common coating methods such as coating. The wet film is cured after UV irradiation for 10-50S at a temperature of 50-100°C to form a continuous frosted coating dry film, which is layer 2 in Figure 1. The frosted particles can They are organic particles such as PMMA, PBMA, and PDMS or inorganic particles such as SiO2, Al2O3, and ZrO2. The organic polymer solution is often one or two of acrylic, polyurethane, and other materials;

Step 2: Use the composite film prepared in step 1, apply silicone oil solution on the upper surface of film layer 2 by scraping, line coating, etc., and dry it in a hot oven at a high temperature of 140-160°C for 1-5 minutes to prepare an anti-stick dry film. , that is, layer 1 in Figure 1;

Step 3: Use the composite film prepared in step 2 above to prepare a wet film of the first adhesive layer 44 on the lower surface of the first film base material layer 3 by spraying, scraping or roller coating, 50-100°C. After drying for 1-5 minutes, the first adhesive 4 is obtained;

Step 4: Provide the second film substrate layer 7, apply a wet film of the modified primer coating 6 on its upper surface, and form a dry film of the modified primer coating 6 after drying at a high temperature of 70-90°C; then , use an atomic layer deposition process or a magnetron sputtering process to prepare a water vapor barrier layer 5 on the upper surface of the modified primer coating 6; then sequentially stack the composite film prepared in the above steps with the composite film prepared in step 3. The sheets are assembled, bonded under pressure and combined, then rolled up for use, wherein the water vapor barrier layer 5 is bonded to the first adhesive layer 4.

The structural schematic diagram of the package front plate obtained according to this alternative preparation process is also shown in Figure 2.

The package front panel of this embodiment includes a composite anti-adhesive coating 1, a frosted aging-resistant layer 2, a first film base material layer 3, a first adhesive layer 4, a water vapor barrier layer 5, and a modified primer. Coating 6, second film substrate layer 7.

Example 3

In order to further improve the weather resistance, high light transmittance and ease of use of the packaging front panel, the following structural and process improvements can be made to the packaging front panel composite film of the present invention.

Preferably, based on the composite film structure of the encapsulated front panel in Embodiment 2, the lower surface of the second film base material layer 7 is composited with a second adhesive layer 8 .

More preferably, a PE protective film 9 is compounded on the lower surface of the second adhesive layer 8 .

The structural schematic diagram of the package front plate obtained in this embodiment is shown in Figure 3.

Among them, 8 is the second adhesive layer, preferably with a light transmittance of more than 95% and a thickness of 100-300um. This layer plays the role of bonding and isolation. When packaging the front panel, the adhesive layer can tightly Adhered to the upper surface of the solar panel; 9 is a PE protective film, which is easy to tear and plays a role in protecting the finished composite film of the encapsulated front panel. When the encapsulated front panel composite film needs to be encapsulated on the surface of the solar cell, it is peeled off. Just remove this layer of protective film.

The flexible solar package front panel provided with the above-mentioned composite film structure has significantly improved performance in terms of wear resistance, scratch resistance, water resistance, light transmittance, and weather resistance.

The specific preparation process of the package front plate of the present invention shown in Figure 3 is:

On the basis of the packaging front plate with the structure of Embodiment 2, it is also preferred to perform the following steps: prepare a second adhesive layer on the lower surface of the second film base material layer by spraying, scraping or roller coating. The wet film is dried at 50-100℃ for 1-5 minutes to obtain a second adhesive layer with a thickness of 5-30um.

More preferably, the method also includes the following steps: compounding a PE protective film on the lower surface of the second adhesive layer and rolling it up.

The package front panel of this embodiment includes a composite anti-adhesive coating, a frosted aging-resistant layer, a first film base material layer, a first adhesive layer, a water vapor barrier layer, a modified primer coating, a second Film base material layer, second adhesive layer, PE protective film.

When the packaging front plate prepared according to the above preparation process of the present invention is used, specifically when it is used to package the upper surface of a flexible mobile solar cell module, conventional packaging methods in the prior art can be used. For example, you can specifically follow the following steps: first prepare a mold that matches the packaged solar panel, spray and sinter a layer of rubber mold material on the inner surface of the mold, put the solar cell panel into the groove of the mold, and then put The template on which the solar panel is placed is covered with the packaging front panel composite film provided by the present invention (when placing, if the packaging front panel composite film contains a PE protective film, the outermost PE protective film of the composite film can be removed first), Then put it into the laminator for packaging, take it out for cooling and demoulding.

The invention is applied to the packaging front plate of flexible solar cells. It is scratch-resistant, has low water vapor transmittance, is low-cost, has a simple and efficient packaging process, and has a high yield rate. It can meet the service life requirements of consumer products for mobile energy sources; it introduces high light transmittance. The adhesive layer makes the flexible front panel thin and soft.

Here, it should be noted that the description of the above technical solutions is exemplary, this description can be embodied in different forms, and should not be construed as being limited to the technical solutions set forth herein. Rather, these descriptions are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. In addition, the technical solution of the present invention is limited only by the scope of the claims.

The shapes, dimensions, ratios, angles and numbers disclosed to describe aspects of the specification and claims are examples only, and therefore the specification and claims are not limited to the details shown. In the following description, when the detailed description of related known functions or configurations is determined to unnecessarily obscure the focus of the present specification and claims, the detailed description will be omitted.

Where "including", "having" and "including" are used in this specification, there may also be another part or part, unless "only" is used. The term used may generally be singular but may also mean plural. form.

It should be noted that although the terms "first", "second", "top", "bottom", "one side", "other side", "one end", "other end" etc. may appear and be used in this specification to describe various components, but these components and parts should not be limited by these terms. These terms are only used to distinguish one ingredient or part from another ingredient or part. For example, without departing from the scope of the specification, a first component could be termed a second component, and similarly, a second component could be termed a first component, and top and bottom components could also be termed under certain circumstances. Can be swapped or converted with each other; components on one end and the other can perform the same or different things from each other.

In addition, when configuring parts, although they are not explicitly described, it is understood that certain error areas are necessarily included.

When describing positional relationships, for example, when the positional sequence is described as "on", "above", "below" and "next", unless "exactly" or "next" are used Words or terms such as "directly" may also include situations where there is no contact or contact between them. If a first element is referred to as being "on" a second element, this does not mean that the first element is necessarily on top of the second element in the drawing. The upper and lower parts of the components change depending on the viewing angle and orientation. Thus, references in the drawings or in actual constructions to a first element being "on" a second element may include references to a first element being "below" a second element as well as references to a first element being "below" a second element. above" situation. When describing a temporal relationship, descriptions of "after", "subsequently", "subsequently" and "before" may include instances where steps are not consecutive, unless "just" or "directly" is used.

Features of the various embodiments of the invention may be partially or fully combined or spliced with one another, and may be implemented in a variety of different configurations as will be fully understood by those skilled in the art. Embodiments of the invention may be executed independently of each other or may be executed together in an interdependent relationship.

Claims (12)

1. A packaging front plate, which is a composite film attached to the upper surface of a solar cell module. It is characterized in that, from top to bottom, the composite film includes an anti-stick coating, a frosted aging-resistant layer, The first film base material layer, the first adhesive layer, and the water vapor barrier layer; The lower surface of the water vapor barrier layer also includes a layer of modified primer coating; The lower surface of the modified primer coating also includes a second film substrate layer; The lower surface of the second film base material layer also includes a second adhesive layer; The lower surface of the second adhesive layer also includes a layer of PE protective film; The first film base material layer is a highly light-transmitting PET film with a thickness of 50-200um and a light transmittance of more than 90%; the second film base material layer is a highly light-transmitting PET, PEN or PBT film with a light transmittance of The rate is over 90% and the thickness is 50-200um. 2. A preparation process for a package front plate as claimed in claim 1, characterized in that step 1: mix the frosted particles, anti-aging agent and organic polymer solution evenly, and place them on the upper surface of the first film base material layer A dry film of a continuous frosted aging-resistant layer is formed through processing; Step 2: Use the composite film prepared in Step 1 to prepare a dry film of an anti-adhesive coating on the upper surface of the above dry film; Step 3: Prepare the first adhesive layer Fluid, use the composite film prepared in the above step 2, use line coating, blade coating or roller coating to process the above fluid on the lower surface of the first film base material layer to obtain a wet film of the first adhesive layer, and after drying, the first Dry film of the adhesive layer; Step 4: Using the composite film prepared in Step 3, a water vapor barrier layer is prepared on the lower surface of the first adhesive layer using an atomic layer deposition process or a magnetron sputtering process. 3. The preparation process of a package front plate according to claim 2, characterized in that it also includes the following steps: coating the lower surface of the water vapor barrier layer with a wet film of a modified primer coating, and passing it through a high temperature of 70-90 After drying at ℃, a dry film of the modified primer coating is formed. 4. The preparation process of a package front plate according to claim 3, further comprising the step of compounding a second film base material layer on the lower surface of the dry film of the modified primer coating. 5. The preparation process of a packaging front plate according to claim 4, further comprising the following steps: preparing the lower surface of the second film base material layer by spraying, scraping or roller coating. The wet film of the second adhesive layer is dried at 50-100°C for 1-5 minutes to obtain the second adhesive layer, with a thickness of 5-30um. 6. The preparation process of a package front plate according to claim 2, in step 1, the specific steps of forming a frosted aging-resistant layer dry film are: applying scraping on the upper surface of the first film base material layer Or a frosted coating wet film is prepared by roller coating. The wet film is cured after UV irradiation for 10-50S at a temperature of 50-100°C to form a dry film of a continuous frosted aging-resistant layer. 7. The preparation process of a packaging front plate according to claim 2, in step 2, the specific preparation step of the dry film of the coating is: scraping the upper surface of the dry film in step 2. Apply the silicone oil solution by coating or line coating, dry it in a hot oven at a high temperature of 140-160°C for 1-5 minutes, and then prepare a dry film of the anti-stick coating. 8. A preparation process for a package front plate as claimed in claim 1, characterized in that it includes the following steps: Step 1: Mix the frosted particles, anti-aging agent and organic polymer solution evenly, and process the upper surface of the first film substrate layer to form a dry film of a continuous frosted aging-resistant layer; Step 2: Use the composite film prepared in Step 1 to prepare a dry film of anti-adhesive coating on the upper surface of the above dry film; Step 3: Prepare the fluid for the first adhesive layer. Use the composite film prepared in the above step 2, and process the above fluid on the lower surface of the first film substrate layer using line coating, blade coating or roller coating to obtain the first adhesive layer. The wet film of the adhesive layer is dried at 50-100°C for 1-5 minutes to obtain a dry film of the first adhesive layer; Step 4: Provide a second film substrate layer and apply a modified primer coating on its upper surface The wet film is dried at a high temperature of 70-90°C to form a dry film of the modified primer coating; then, water vapor is prepared on the upper surface of the modified primer coating using an atomic layer deposition process or a magnetron sputtering process Barrier layer; then, the composite film prepared in the above steps is laminated and combined with the composite film prepared in step 3 respectively, bonded under pressure and combined, then rolled up for use, wherein the water vapor barrier layer is bonded to the first adhesive layer combine. 9. The preparation process of a packaging front plate according to claim 8, characterized in that it also includes the following steps: preparing the lower surface of the second film base material layer by spraying, scraping or roller coating. The wet film of the second adhesive layer is dried at 50-100°C for 1-5 minutes to obtain the second adhesive layer, with a thickness of 5-30um. 10. The preparation process of a package front plate according to claim 9, further comprising the following steps: compounding a PE protective film on the lower surface of the second adhesive layer and rolling it up. 11. The preparation process of a package front plate according to claim 8, in step 1, the specific steps of forming a frosted aging-resistant dry film are: applying scraping on the upper surface of the first film base material layer Or a frosted coating wet film is prepared by roller coating. The wet film is cured after UV irradiation for 10-50S at a temperature of 50-100°C to form a dry film of a continuous frosted aging-resistant layer. 12. The preparation process of a packaging front plate according to claim 8, in the step 2, the specific preparation step of the dry film of the coating is: scraping the upper surface of the dry film in the step 2. Apply the silicone oil solution by coating or line coating, dry it in a hot oven at a high temperature of 140-160°C for 1-5 minutes, and then prepare a dry film of the anti-stick coating.