What is photovoltaic film?
Guangzhou Zanchen New Material Technology Co., Ltd.
Photovoltaic film is a key material used for PV module encapsulation, which plays a role in protecting the cell and bonding the module.
Photovoltaic film is mainly used in the production of photovoltaic modules, it is located in the upper and lower sides of the cell, is responsible for the photovoltaic glass It is located at the top and bottom of the cell and is responsible for gluing the PV glass, cell, backsheet and other components together to form a complete PV module. This film not only has a strong bonding ability, but also has good light transmission to ensure that light can effectively penetrate and be absorbed by the cells.
In addition, the types of photovoltaic encapsulation films include EVA film (ordinary transparent EVA film, white EVA film), POE film and so on. Among them, EVA is mainly used for single-glass PV cell encapsulation, while POE film is suitable for more efficient or demanding PV cell encapsulation due to its superior weather resistance and light transmission.
In summary, Photovoltaic film plays a crucial role in PV module manufacturing, not only protecting the cells from the external environment, but also ensuring the structural integrity and photoelectric conversion efficiency of the module. With the continuous progress of PV industry technology and the growth of market demand, the research and development and application of Photovoltaic film are also constantly developing and improving.
The photovoltaic film of Our Company
Guangzhou Zanchen New Material Technology Co., Ltd. is recognized as a comprehensive technology enterprise with a specialized focus on research, design, production, and sales. Our core business revolves around the development, manufacturing, and distribution of polyurethane (TPU) films, EVA solar photovoltaic films, and EVA glass films.
polyurethane (TPU) films
EVA solar photovoltaic films
EVA glass films
PHOTOVOLTAIC FILM FUNCTION
- Protection of battery cells: The photovoltaic film covers the upper and lower surfaces of the battery cells to protect the battery cells from the effects of the external environment, such as ultraviolet radiation, temperature changes and mechanical damage.
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Improve light transmittance: The photovoltaic film has high transparency, which can maximise the sunlight to pass through and reach the cells, thus improving the power generation efficiency of PV modules.
- Provide bonding: The photovoltaic film is used as a bonding material to tightly combine the glass, cells and backsheets in the PV module to ensure the structural stability of the module.
- prolong service life: the quality of the photovoltaic film is directly related to the reliability and service life of the PV module, high-quality photovoltaic film can effectively extend the service life of the module and reduce maintenance costs.
- Physical isolation and heat dissipation: PV adhesive film provides support for the battery line, physically isolates the battery cell and line, while conducting the heat generated by the battery cell, maintaining a stable working temperature of the battery cell.
- Water vapour barrier: the adhesive film has excellent water vapour barrier properties, delaying the corrosion process accelerated by the environmental factors of the battery cells, thus extending the service life of the photovoltaic module.
In summary, Photovoltaic films play a crucial role in PV modules, not only protecting the cells, but also ensuring maximum light absorption and structural integrity of the module, thus guaranteeing the long-term stable operation of PV modules.
How can Photovoltaic film improve the power generation efficiency of battery cells?
- High Transmittance: photovoltaic film has high transparency, can maximise the sunlight through the film to reach the battery cell, so that more light energy is absorbed by the battery cell, thus improving the photoelectric conversion efficiency.
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UV and weathering resistance: photovoltaic film needs to have good UV and weathering resistance to prevent yellowing or performance degradation that occurs due to prolonged exposure to the outdoors, and these properties help maintain long-term power generation efficiency.
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Good adhesion: photovoltaic film and photovoltaic glass The good bonding of photovoltaic film with PV glass and backsheet ensures the structural stability of the module and reduces battery corrosion due to delamination or water vapour infiltration, which all directly affect the power generation efficiency and service life of PV modules.
In summary, PV sealant film plays a vital role in the protection and power generation efficiency of PV modules through its physical and chemical properties. Although it is a small percentage of the cost of a PV module, it has a significant impact on the performance and lifetime of the module.
what is the main component of Solar EVA film?
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EVA resin: This is the base material for photovoltaic adhesive film with good transparency and adhesion.
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Crosslinking agent: Used to improve the mechanical strength and aging resistance of the adhesive film.
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Silane Coupling Agent : Enhances the bond between the adhesive film and the glass and backsheet.
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Other modifiers: added as needed to improve specific properties, such as UV resistance, weatherability, etc.
In addition, there are a number of other auxiliary ingredients in addition to those mentioned above, the exact proportions and types of which depend on the intended application and performance requirements of the adhesive film. During the production process, these raw materials are blended in a mixer and left to stand for a certain period of time before being placed in an adhesive film production line to be cast and extruded into a molten film.
Guangzhou Zanchen New Material Technology Co., Ltd. is recognized as a comprehensive technology enterprise with a specialized focus on research, design, production, and sales. Our core business revolves around the development, manufacturing, and distribution of polyurethane (TPU) films, EVA solar photovoltaic films, and EVA glass films.
Our products are utilized across a broad spectrum of applications including footwear materials, apparel, inflatable toys, aquatic and underwater sports equipment, fitness gear, automotive seating materials, umbrellas, suitcases, and bags. Our company currently operates 2 blown film production lines and 10 cast film machines, providing a vast array of product options.
Our unwavering commitment to excellence and innovation positions us at the vanguard of our industry, ensuring that we deliver premium products and services that align with the dynamic requirements of our clientele. We eagerly anticipate forging enduring partnerships and are dedicated to contributing to the success of your endeavors with our expertise and steadfast commitment to quality.
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Corporate Slogan
Expert Quality, Artisan Craftsmanship, Dedicated to Crafting Unique Value for Our Clients!
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Corporate Spirit
Unity, Innovation, Quality, Efficiency
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Service Scenarios
As one of the leading brands in the Chinese market,Zanchen New Material has experienced teams on R&D,manufacturingsales, marketing
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Services Offered
We specialize in professional custom development services, encompassing tailored film development and the creation of specialized films.
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Corporate Mission
We are customer-centric, committed to building trust through quality, and dedicated to achieving excellence in management.
ZANCHEN
What is the production process of photovoltaic adhesive film?
in order to improve production efficiency and product quality, advanced production processes such as continuous extrusion technology and precision coating technology will be used in the production process. Attention will also be paid to the treatment and recycling of waste materials and wastewater in order to reduce energy and resource consumption and realise green production.
In summary, the production of photovoltaic adhesive films is a delicate and environmentally friendly process that ensures the long-term stability and reliability of photovoltaic modules.
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Raw materials preparation
First, prepare EVA resin and cross-linking agent, Silane coupling agent and other necessary modifiers. These materials will be mixed according to specific ratios to ensure that the adhesive film has the required properties. -
Melt extrusion
The evenly mixed raw materials are extruded through the extruder head in the molten state to form the required thickness of adhesive film. -
Cooling and shaping
The extruded molten film is cooled by cooling rollers to fix its shape and size. -
Cutting and packaging
The cooled film is cut according to the specified width and length, and then packaged for the subsequent encapsulation of photovoltaic modules.
Quality inspection: In the whole production process, there will be strict quality control measures to ensure that each batch of adhesive film meets the standards.
How to use photovoltai film correctly?
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Preparation phase
1. Ensure that the operating environment is clean and dust-free, and that temperature and humidity are controlled within appropriate limits.
2. Inspect the PV adhesive film for damage, contamination or yellowing. 01 -
Lay the adhesive film
1. Unroll the photovoltaic adhesive film on a flat, clean surface to avoid air bubbles or wrinkles.
2. Cut the adhesive film to the required size, leaving a suitable edge for lamination. 02 -
Lamination process
1. Lay the cut adhesive film flat on the photovoltaic glass on the PV glass, making sure the position is aligned.
2. Place the battery cells and wiring and cover with a layer of adhesive film.
3. Place in a laminating machine and laminate at the set temperature and pressure. 03 -
Post-processing
1. After lamination is complete, inspect the component for air bubbles, delamination or other defects.
2. Carry out the necessary trimming and cleaning work to ensure that the components have a neat appearance.
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Precautions:
- Avoid direct exposure to sunlight photovoltaic adhesive film to prevent early cross-linking reaction.
- Storage should be placed in a dry, cool environment, avoiding high temperature and humidity.
- Small batch test before use to confirm that the performance of the adhesive film meets the requirements.
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What is the lifespan of solar eva film?
The life of solar eva film usually matches the expected life of photovoltaic modules, which is generally 25-30 years. Solar eva film is an indispensable part of solar photovoltaic modules. Solar eva film accounts for a relatively small amount of the total cost of photovoltaic modules, about 4-7%. Its quality directly affects the performance and life of photovoltaic modules. The following is a detailed explanation of the lifespan of solar eva film:
Effect of material aging: As time goes by, solar eva film will gradually age, which may cause problems such as fading, delamination, and blistering of photovoltaic modules. EVA (ethylene vinyl acetate copolymer) is a commonly used photovoltaic encapsulation film material. It may yellow after long-term exposure outdoors, which is a sign of material aging.
Challenges from environmental factors: Photovoltaic modules need to face a variety of natural environmental challenges during operation, such as extreme temperature changes, humidity, ultraviolet radiation, etc. These factors may accelerate the aging process of the film.
Technology development: With the continuous advancement of photovoltaic technology, our technicians are developing new packaging films and backsheet materials to improve the durability and life of photovoltaic modules.
In summary, although the current expected life of standard photovoltaic modules is 25-30 years, with the development of new materials and technologies, the life of solar eva film is expected to be significantly extended in the future. At the same time, in order to ensure the stability and power generation efficiency of photovoltaic modules, regular maintenance and inspection are also very important.
How to choose the right solar eva film to extend its service life?
ZANCHEN
Consider the aging resistance of the film: aging resistance is the key to whether the solar eva film can maintain its performance for a long time. Choosing an adhesive film with excellent aging resistance can ensure that the film will not age prematurely in the face of ultraviolet radiation and environmental changes, thus extending the service life of the PV module.
Focus on the film's transmittance: transmittance directly affects the power generation efficiency of the PV module. Choosing a high transmittance film will allow more sunlight to pass through, improve photoelectric conversion efficiency, and ensure the performance of the cell at the same time.
Assessment of shrinkage and peel strength: shrinkage and peel strength is also an important indicator to assess the performance of solar eva film. Appropriate shrinkage can reduce the material deformation due to temperature changes, and high peel strength can ensure that the film and photovoltaic glass and backplane good bonding, to avoid delamination or blistering phenomenon occurs.
Understand the water vapour permeability: low water vapour permeability of the film can effectively block the entry of water to reduce moisture and corrosion of the battery sheet, thereby protecting the battery sheet from damage and extending the life of the module.
Consider the cost factor: although solar eva film in the total cost of components accounted for a relatively small, but the choice of the right film can not increase the cost of the premise, significantly improve the performance and life of the components.
Consider the environmental adaptability: photovoltaic modules need to operate stably in a variety of natural environments, including extreme temperature changes, humidity and so on. Therefore, it is very important to choose an adhesive film that can maintain stable performance under these conditions.
In summary, selecting the right solar eva film requires consideration of a number of aspects, including ageing resistance, light transmission, shrinkage and peel strength, water vapour permeability, cost factors and environmental adaptability. By taking these factors into account, the most suitable solar eva film can be selected to extend its service life and improve the overall performance of the PV module.
What is the PV module encapsulation process like?
PV module encapsulation is a complex process involving multiple steps designed to ensure cell performance and longevity. The following are the key steps in the process:
1. Cell sorting: Because the performance of the cells may vary during the manufacturing process, the cells need to be tested and sorted prior to encapsulation to ensure that the cells combined together have consistent or similar performance.
2. Laser scribing: For the cells that need to be scribed, a UV laser is used to cut the whole cell into the required shape and size.
3. Single and String Welding: The battery cells are connected by welding to form a battery string.
4. Stacking：The battery strings are laminated with solar eva film, glass and backsheet to prepare for the subsequent lamination.
5. lamination: through high pressure and high temperature will be the layers of materials bonded together to form a solid photovoltaic module structure.
6. Trimming: removing excess edge materials to make the PV module more neat and beautiful.
6. Framing and junction box installation: In order to improve the mechanical strength of the PV module and facilitate the installation, a frame will be installed around the module and a junction box will be installed on the back.
7. Cleaning and testing: The surface of the module is cleaned, and then a series of performance tests are carried out, including the IV test (current-voltage characteristic test), the insulation withstand voltage test, and the final EL (electroluminescence) test, to ensure that the module's performance meets the standards.
8. Packaging: Finally, the PV modules are protected from damage during transport by packaging.
In summary, the process of PV module packaging is not only concerned with improving cell protection and performance, but also involves cost control and technical efficiency.
What are the types of solar eva film?
Solar eva film is an indispensable part of solar photovoltaic (PV) modules. It is located on both sides of the cell, playing a key role in bonding, light transmission and protection. The types of solar eva film mainly include EVA (ethylene vinyl acetate copolymer), POE (polyvinyl butyral), EPE film.
EVA film: this is one of the most commonly used photovoltaic encapsulation adhesive film materials, with good transparency and adhesion, can effectively bond the photovoltaic glass, cell and backsheet, EVA film, including the traditional transparent EVA film, white EVA film, etc., which white EVA film can reflect more sunlight, to improve the efficiency of photoelectricity conversion of the battery.
POE film: this material combines the processing convenience of plastic and rubber durability, barrier properties, with excellent high light transmittance and low water vapour permeability, to ensure the efficient operation of the photovoltaic cell and long durability. the use of POE film helps to resist the external environment on the photovoltaic module, to protect the internal integrity of the cell.
EPE film: Although not as common as EVA and POE film, but EPE film is also a material used for PV module encapsulation.
What is the density of solar eva film?
Solar eva film is a key material in solar photovoltaic (PV) modules, which is mainly used for bonding and encapsulating cells to protect the cells and improve the overall performance of the module. Regarding the standard of solar eva film, China has the corresponding national standard GB/T 29848-2018, which specifies the relevant requirements of ethylene vinyl acetate copolymer (EVA) adhesive film for photovoltaic module encapsulation, including classification, requirements, test methods, inspection rules, and marking, packaging, transport and storage.
If you need to know the density of solar eva film, we suggest you to consult the relevant product technical specification or contact guangzhou zanchen New Material for detailed information. Often, the density of such materials is given in the product specification or technical data sheet, or can be determined by laboratory tests. In practice, it is important to know the density of solar eva film in order to calculate the amount of material required and to estimate the costs.
Guangzhou Zanchen New Material Technology Co., Ltd. stands at the forefront of solar film innovation, integrating scientific research, design, production, and sales into one cohesive unit. Nestled in the Xinhua Industrial Park on Yingbin Avenue, Huadu District, Guangzhou, this industrial and trade-oriented enterprise boasts a wealth of professional experience within the sector. With additional offices in Zhejiang and Chengdu, the company specializes in the development, production, and sales of polyurethane (TPU) films, EVA solar photovoltaic films, and EVA glass films.
-
Corporate Slogan
Expert Quality, Artisan Craftsmanship, Dedicated to Crafting Unique Value for Our Clients!
-
Corporate Spirit
Unity, Innovation, Quality, Efficiency
-
Service Scenarios
As one of the leading brands in the Chinese market,Zanchen New Material has experienced teams on R&D,manufacturingsales, marketing
-
Services Offered
We specialize in professional custom development services, encompassing tailored film development and the creation of specialized films.
-
Corporate Mission
We are customer-centric, committed to building trust through quality, and dedicated to achieving excellence in management.
How do I clean solar eva film?
Cleaning solar eva film usually involves removing or degrading the adhesive film material so that the PV module can be repaired or recycled if necessary. The following are some possible clean-up methods:
1. Wet dismantling: This method uses an organic solvent to dissolve the EVA or PVB film. By applying the solvent to the adhesive film, the adhesive layer can be softened or dissolved so that it can be peeled away from the glass or other surfaces.
3. Mechanical Methods: In some cases, it may be necessary to use mechanical means to physically peel or scrape off the adhesive film. This usually needs to be done carefully to avoid damaging the cell underneath.
4. Chemical cleaners: Specific chemical cleaners can also be used to remove or neutralise certain components of the adhesive film, especially when the film is hydrolysed to generate acetic acid, which may be required to prevent further chemical reactions.
5. Professional services: Due to the sensitivity and complexity of PV modules, it is recommended that a professional PV maintenance company be contacted to carry out the cleaning and maintenance work to ensure that no damage is done to the performance and structure of the modules.
6. Precautionary measures: It is very important to understand the specific materials and structure of the PV module before carrying out any cleaning work. Different PV modules may use different types of adhesive films and encapsulation materials, so the appropriate cleaning method needs to be selected according to the specific situation.
7. Safety precautions: When handling PV modules, it is important to take appropriate safety measures, such as wearing protective gloves and glasses, and ensuring good ventilation to prevent exposure to harmful chemicals or potential electrical hazards.
In summary, cleaning up solar eva film is a process that requires careful handling, and it is recommended that it be carried out under the guidance of a professional to ensure that the adhesive film is cleaned up effectively without damaging other parts of the PV module.
What do I need to pay attention to when using solar eva film?
1, Moisture and dust: EVA film has a strong adsorption capacity, so in the use of the process need to pay special attention to moisture and dust. Avoid contact with coloured objects to prevent the film from being contaminated.
2, To prevent exposure: do not take off the packaging of the whole roll of film for a long time exposed to the air, so as not to affect its performance. Slice into pieces of film if you can not use up the same day, should be covered tightly to maintain its adhesion and cleanliness.
3, The storage environment: EVA adhesive film storage environment should be controlled at a temperature below 30 degrees Celsius, humidity below 60% to ensure that the quality of the film is not affected.
4, Size control: As the EVA film will have a large shrinkage rate after heating, so in the lamination before the need to properly increase the size of the EVA film, in order to prevent the emergence of no EVA adhesive inside the component, which not only affects the performance of the component, but also causes a waste of materials and pollution of equipment.
5, Cross-linking degree control: EVA film cross-linking degree is to ensure its good adhesive properties of the key. In the lamination process, you need to ensure that the EVA film can be firmly bonded to the solar cell sheet, in order to provide effective mechanical protection in the outdoor environment and resist external erosion.
6, Mixing uniformity: before using EVA adhesive film, you need to ensure that its raw materials (such as EVA resin, crosslinking agent, silane coupling agent and other modifiers, etc.) in the mixer mixing uniformity, and in an airtight container for a period of time in order to ensure that the stability and consistency of the material.
6, Laminator cleaning: As EVA adhesive film may produce excess colloid after heating, these colloids may cause contamination to the laminator and conveyor belt. Therefore, in the use of laminating machine for component encapsulation, need to pay attention to regular cleaning of the machine, in order to maintain the cleanliness and normal working condition of the equipment.
In summary, when using solar eva film, attention needs to be paid to moisture and dust protection, prevention of exposure, storage environment, size control, cross-linking degree control, homogeneous mixing and laminator cleaning to ensure the quality and performance of PV modules.
How to avoid solar eva film being polluted?
1, Moisture and dust: due to the strong adsorption capacity of EVA film, should avoid contact with coloured objects to prevent the film from being contaminated. In the lamination process, do not take off the packaging of the whole roll of film for a long time exposed to the air, in order to prevent its performance is affected. If the film can not be used up on the same day, it should be covered tightly to maintain its adhesion and cleanliness.
2, control the storage environment: EVA adhesive film storage environment should be controlled at a temperature below 30 degrees Celsius, humidity below 60% to ensure that the quality of the film is not affected.
3, Improve the cutting size and laying method: By improving the cutting size and laying method of EVA adhesive film and backing plate, we can effectively avoid the occurrence of components being contaminated in the lamination process.
4, Sealed in the shade to avoid light preservation: in the case of not unsealed, photovoltaic encapsulation film should be sealed in a cool place to avoid light preservation, away from heat, sparks or flames, to prevent acid and alkali corrosion, dust, extrusion and deformation. Preservation temperature should be between 0-30 ℃, preservation period of 6 months.
5, Sealed storage: For the encapsulated adhesive film that has been unsealed, it should be sealed and stored with corresponding measures to prevent it from external contamination, with a shelf life of 24 hours.
6, Add anti-aging additives: you can add inorganic particles in the EVA film or other additives to enhance its anti-aging properties, thereby extending the service life of the equipment.
7, Keep the equipment clean: regular cleaning of the laminator and other related equipment to maintain the cleanliness and normal working condition of the equipment to reduce the potential contamination of EVA film.
8, Avoid direct contact: during operation, staff should wear appropriate protective equipment, such as gloves and masks, in order to avoid direct contact with the adhesive film and reduce the risk of contamination.
How to measure the density of solar eva film?
1, Differential Scanning Calorimetry (DSC): This is a method that can measure the content of ethylene vinyl acetate copolymer (EVA), so as to indirectly know the density of EVA film.
2, Following national standards: China's national standard GB/T 29848-2018 stipulates the relevant requirements for EVA adhesive film for PV module encapsulation, which may include the density measurement method.
3, Laboratory test: Measurement is carried out in a laboratory environment using professional test equipment and instruments, such as electronic balances and specific gravity bottles, etc., in accordance with standard test procedures.
4, Supplier data: Usually, the supplier of EVA adhesive film will provide detailed technical parameters of the product, including density and other information.
5, Professional Consultation: If you need accurate measurement results, you can consult professional chemical analysis or material science institutions, who have professional knowledge and equipment to determine the density of the material.
6, Environmental factors to consider: In the measurement process, you also need to consider environmental factors, such as temperature and humidity, because these factors may affect the accuracy of the measurement results.
8, sample preparation: to ensure that the sample is clean, free of impurities, and has reached room temperature before the measurement, in order to avoid the impact of temperature differences on the measurement results.
9, Repeat Measurement: In order to obtain more accurate data, it is recommended to make several measurements and take the average value.
In summary, the density of solar eva film can be measured by the above methods. It should be noted that these methods include, but are not limited to, differential scanning calorimetry (DSC). In practice, they should be carried out in strict accordance with the relevant standards and operating procedures to ensure the accuracy and reliability of the data.
How to choose the right solar eva film?
1, Bonding performance: one of the main roles of EVA adhesive film is to bond the photovoltaic cell sheet with the glass and backsheet, so you need to choose the adhesive film with strong bonding ability. In the process of use, attention should be paid to moisture-proof and dust-proof, avoid contact with coloured objects, so as not to affect its bonding performance.
2, Aging resistance: EVA film in the outdoor environment for long-term exposure will occur "yellowing" and "browning", so the choice should be considered when its aging resistance. By adding inorganic particles, antioxidants, light stabilisers and other additives to reduce the rate of oxidative decomposition of EVA, improve its aging resistance.
3, Transmittance: EVA film should ensure a high rate of solar radiation transmission to ensure the light coupling effect of the cell.
4, Brand and market share: when choosing, you can consider the mainstream brands and products in the market.
5, Technical support and after-sales service: choose the supplier with good technical support and after-sales service, so that the problems encountered in the process of use can be solved in time.
How To Judge The Quality Of Solar Eva Film?
Judging the quality of solar EVA film involves assessing various aspects, including physical and chemical properties, as well as the production process. Key factors to consider are the VA content, which affects the film's heat resistance, polarity, and adhesion; the melt index, which indicates the fluidity and bonding strength of the film; and the crosslinking degree, which determines the structural integrity of the film. Testing the thickness and uniformity of the adhesive film is also important, as well as ensuring compliance with relevant national or industry standards. Additionally, comprehensive evaluation of performance factors such as aging resistance, light transmission, and weather resistance should be conducted. Choosing reputable and technically mature suppliers is crucial in guaranteeing the quality of EVA film. Ultimately, professional testing and evaluation are necessary to ensure that the selected EVA film meets the requirements for PV module production, thus ensuring the performance and lifespan of PV products.
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Guangzhou Zanchen New Material Technology Co., Ltd. is a solar film innovation company based in Guangzhou, China. They specialize in the research, development, production, and sales of polyurethane films, EVA solar photovoltaic films, and EVA glass films. Their comprehensive services cover product development, manufacturing, and distribution to deliver customized solutions that exceed industry standards. They serve a diverse clientele, including solar technology companies, construction companies, and architectural entities. Their team of experienced professionals is dedicated to collaboration, innovation, and excellence, maintaining the highest standards of quality and performance. They are committed to pushing the boundaries of thin film solar technology through research and development, and have experienced strong growth in the industry. Their state-of-the-art facilities ensure efficiency and quality while adhering to strict sustainability and environmental standards. In the future, they plan to advance their research and development programs, expand globally, and establish strategic partnerships to drive innovation and meet industry needs.
READ MOREWhat factors affect the performance of solar eva film?
1, Raw materials: EVA adhesive film raw materials include EVA resin, crosslinking agent, silane coupling agent and other modifiers. The quality of these materials directly affects the adhesive properties and durability of the final product.
2, Fluidity: good fluidity to ensure that the EVA adhesive film in the substrate lay flat, increase the contact area with the substrate, the formation of more physical bonding points, thereby improving the bonding strength.
3, Coupling agent: the use of silane coupling agent can significantly improve the bonding performance of EVA adhesive film. Through different types of coupling agent compounding and adding the appropriate amount of tackifying resin, you can get a high initial adhesive force and good wet heat stability of the encapsulation film.
4, Anti-PID performance: potential-induced decay (PID) is a key factor affecting the long-term stability of photovoltaic modules. modification of EVA adhesive film is essential to improve the anti-PID performance of photovoltaic modules. This involves the optimization of vinyl acetate (VA) content and the adjustment of the ratio of additives to improve the volume resistivity of the encapsulated adhesive film.
5, The production process: the production of mixing, static, cast extrusion and other process steps will affect the quality of the adhesive film. The correct production process can ensure the uniformity and stability of the film.
6, Environmental factors: temperature, humidity, voltage, light and other external environmental conditions will also have an impact on the performance of EVA film. For example, high temperature and humidity may accelerate the aging process of the material, reducing its adhesive strength and durability.
7, Module structure: the structural design of PV modules, such as glass, encapsulation film, battery cells, backplane and other material matching, will also affect the performance of EVA adhesive film. The compatibility and interaction of different materials will directly affect the stability and efficiency of the whole module.
To summarize, the performance of EVA adhesive film is affected by a combination of factors such as raw material quality, formula design, production process and external environment. These factors need to be strictly controlled and optimized during production and use to ensure the performance and life of PV modules.
How to improve the light transmittance of solar eva film?
1, The use of high transmittance materials: choose a higher transmittance of EVA materials, which can reduce the loss of light, thereby improving the overall transmittance of the film.
2, Reduce impurities and defects: strict control in the production process to reduce impurities and defects in the material, which can reduce light scattering and absorption, improve light transmission.
3, Optimize the thickness of the film: by reducing the thickness of the film, you can allow more light to pass through, but at the same time need to ensure that the mechanical strength of the film and the protective properties are not affected.
4, Surface treatment: EVA adhesive film surface treatment, such as coating a layer of high light transmittance coating, can also effectively improve its light transmittance.
5, Add light stabilizers and antioxidants: by adding the appropriate light stabilizers and antioxidants, you can improve the UV aging resistance of EVA adhesive film, so as to maintain its long-term high light transmittance.
6, Moisture and dust: in the process of use, you need to pay attention to the EVA adhesive film moisture and dust, avoid contact with colored objects, so as not to affect its light transmission.
8, Technological innovation: focus on technological advances in the industry and the development of new materials, such as double co-extruded anti-polarization EVA composite film research and development, these new technologies may bring further enhancement of light transmission.
To summarize, to improve the light transmission of solar eva film needs to be considered comprehensively from a number of aspects, such as material selection, production process, surface treatment and use and maintenance. Through these measures, not only the light transmittance of the adhesive film can be improved, but also the efficiency and performance of solar panels can be enhanced, which will help the development of sustainable energy technology.