Explore our leading technologies custom-configured for Serbian manufacturing standards. Designed to deliver optimized melt-homogeneity, high crosslinking index reliability, and long-term durability under environmental stresses.
Specifically designed to produce high-adhesion PVB interlayer films for Building-Integrated Photovoltaics (BIPV). Engineered for high optical transmission, UV blocking stability, and extreme structural safety across commercial architectural projects.
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Co-extrusion technological lines designed for three-layer EPE (EVA-POE-EVA) composite films. Combines the high cost-efficiency and tack of EVA with the high anti-PID capabilities and water-vapor barrier properties of POE.
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Universal platforms configured for shifting between standard EVA and highly efficient POE formulations. Employs advanced tensionless winding systems and low-temperature screw designs to eliminate shrinkage stresses.
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Optimized for high-throughput outputs with tight thickness tolerance controls (±2%). Integrated with automatic dosing, gravimetric feeders, and visual defect monitoring systems ensuring standard-compliant global exports.
Learn Tech SpecsThe Republic of Serbia is currently undergoing a structural transformation of its energy sector. Aligned with the Western Balkans' commitment to EU climate goals and the green agenda, Serbia has revised its National Energy and Climate Plan (NECP), positioning solar power as a critical driver to replace traditional lignite-fired power plants. With peak solar irradiance reaching up to 1,400 kWh/m²/year across key industrial zones like Vojvodina, Niš, and Šumadija, the demand for utility-scale photovoltaic module assembly plants has surged dramatically.
However, setting up solar module manufacturing within the Balkan Free Trade agreements requires strict compliance with international quality thresholds (such as IEC 61215 and IEC 61730). Photovoltaic modules installed in Central and Eastern Europe face harsh continental climates, characterized by hot summers and freezing, snowy winters. Under these parameters, inferior encapsulation film causes catastrophic failures, including **Potential Induced Degradation (PID)**, micro-cracking, and rapid delamination.
For Serbian manufacturers, importing raw encapsulation film carries substantial supply chain risks, high freight costs, and customs complexities. Establishing high-performance local **Solar Extrusion Lines** in Serbia is not merely an alternative; it is a major economic driver. By extruding high-grade EVA (Ethylene Vinyl Acetate) and POE (Polyolefin Elastomer) films within the country, local businesses can supply the regional European market tariff-free, securing a dominant footprint in the regional solar supply network.
Duty-free access to major European utility projects under the CEFTA agreement, allowing seamless exports of laminated glass and PV components.
The Serbian Development Agency (RAS) offers direct financial grants and tax incentives for clean-tech manufacturing facilities.
Skilled chemical engineering workforce combined with competitive utility tariffs and logistics hubs along Corridor X.
Understanding the molecular dynamics and processing challenges of encapsulation polymers is crucial for high-yield extrusion. Gwell machinery integrates thermal and mechanical solutions to process these highly sensitive, cross-linkable materials.
EVA remains the industry benchmark for standard silicon wafer encapsulation. The primary extrusion challenge is avoiding **premature crosslinking** inside the extruder. Standard extrusion lines from Gwell use low-shear barrier screws and advanced temperature controls to maintain the melt below 95°C while delivering high-speed output.
With the transition to high-efficiency cells like N-Type TopCon and HJT, POE encapsulation has become critical. POE exhibits a remarkably low Water Vapor Transmission Rate (WVTR) and high volume resistivity, which eliminates PID. The raw material, however, has a slippery melt behavior. Gwell solves this with specialized grooved-feed barrels and custom raw material feeders.
The modern industry favorite: EPE (EVA/POE/EVA) three-layer composite film. This material offers the anti-PID performance of POE and the cost-effective, high-tack advantages of EVA. It prevents POE slippage during cell assembly, streamlining the module lamination cycle. Gwell's multi-manifold T-Dies allow precise thickness adjustment for each internal layer.
To design or purchase an industrial solar film production line, engineers must analyze the performance criteria of the finished film. Below is the comparative datasheet showing target specifications required by European Tier-1 solar module companies:
| Parameter Profile | EVA Film Extrusion Output | POE Film Extrusion Output | EPE (EVA-POE-EVA) Co-Extruded |
|---|---|---|---|
| Base Density (g/cm³) | 0.94 - 0.96 | 0.87 - 0.88 | 0.91 - 0.93 |
| Water Vapor Transmission (WVTR) | 15 - 25 g/m²·day | < 0.5 g/m²·day | 1.5 - 3.0 g/m²·day |
| Volume Resistivity (Ω·cm) | 1.0 × 10¹⁴ | > 1.0 × 10¹⁶ | > 5.0 × 10¹⁵ |
| Target Melt Extrusion Temperature | 85°C - 95°C | 120°C - 145°C | 90°C - 110°C (Core Dependent) |
| PID Resistance Rating | Moderate | Excellent (HJT/TopCon Standard) | Outstanding Hybrid Balance |
| Average Processing Yield (Gwell Lines) | 98.5% | 97.8% (Tension Free Control) | 98.2% |
China Gwell Machinery is a global high-tech enterprise dedicated to manufacturing plastic extrusion lines for Film, Sheet, and Profiles. Relying on the powerful technology, modern machining facilities, and innovative spirit of our corporate group, Gwell commits to delivering high-tech products to the international market. Aligned with our operating philosophy, "Expertise creates customers' values", we provide tailormade engineering solutions.
Gwell's R&D team works in partnership with leading universities and materials research institutes to continuously develop equipment for advanced renewable energy industries. Our localized setup, global support centers, and comprehensive engineering services ensure your production investment remains highly profitable for decades.
We leverage strong manufacturing capacity and precision engineering to deliver turn-key solutions worldwide.
Collaborating closely with top research institutions, Gwell develops intelligent control models that automate melt thickness correction and thermal monitoring.
Operating three major production bases, Gwell guarantees timely machine deliveries, robust test-runs, and rapid scaling of complex system orders.
Our workforce includes more than 100 mechanical, chemical, and software engineers dedicated to continuous technology research.
We export machinery to over 80 countries, complying with local regulations including EU's CE, Germany's TUV, and North American UL standards.
We offer end-to-end service, covering resin feedstock characterization, custom plant layout planning, test runs, and onsite staff training.
Convenient shipping connections to key railway and seaport hubs ensure cost-effective delivery to Serbia and neighboring regions.
Gwell extrusion systems meet global regulatory requirements for manufacturing quality, operator safety, and structural integrity.
Achieving defect-free encapsulation film requires precise mechanical control over the entire extrusion process. Standard polymer extrusion components are modified on Gwell production lines to process temperature-sensitive solar materials. Below is an engineering overview of our design features:
Once the molten EVA/POE leaves the T-Die, it must be rapidly cooled to prevent premature crystallization and sticking. Gwell employs large-diameter double-envelope casting rollers equipped with internal helical water channels. This design ensures surface temperature variations remain under ±0.5°C across the entire width, ensuring consistent transparency and elasticity.
Encapsulation film formulations require precise additive dosing (including silane coupling agents, UV crosslinking initiators, and thermal stabilizers). Our systems feature multi-station gravimetric dosing units that feed additives directly into the main extruder screw, ensuring uniform chemical distribution throughout the melt.
EVA/POE film is highly elastic. Winding the film under standard tension creates high internal stresses, leading to post-cooling shrinkage. Gwell developed a contact-style windup system with automatic cutting and transfer mechanisms. The system relies on precision load cells to maintain web tension near zero, eliminating shrinkage issues during cell lamination.
Stay informed about our latest extrusion technological milestones, exhibition updates, and solar engineering advancements.
Explore our latest energy-efficient polymer film casting designs. Meet our engineering team to discuss turn-key project setups for Balkan industrial corridors.
Our engineering team has introduced an eco-friendly composite manufacturing process that replaces PVC with thermoplastic POE for automotive and outdoor applications.
This line produces high-precision tapered wedge PVB interlayer film, meeting requirements for automotive head-up display systems (HUD).
Discover Gwell's advanced extrusion portfolio, engineered for solar framing, hydrogen separation, and high-performance polymer film applications in the Balkan market.
Designed for extruding Polyphenylene Sulfide (PPS) diaphragms used in alkaline water electrolyzers. Features excellent chemical resistance and high thermal stability.
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Replaces aluminum profiles with lightweight, corrosion-resistant polyurethane composite frames. Ideal for floating PV setups and harsh industrial environments.
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High-speed cast extrusion lines configured for PVE films, providing excellent adhesion and long-term durability for photovoltaic panels.
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Produces SentryGlas Plus (SGP) ionoplast interlayers, which offer 5 times the tear strength and 100 times the rigidity of standard PVB film.
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Designed to process fluoropolymers under high-temperature extrusion conditions. Suitable for solar backsheets, protective release films, and architectural membranes.
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Features high precision thickness calibration, automatic scrap recycling, and optimized cooling rollers for producing architectural-grade PVB sheets.
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Engineered for cleanroom-grade optical sheets. Designed to deliver low internal stress, high transparency, and precise surface patterns for optical components.
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Industrial-scale systems configured for alkaline hydrogen electrolyzers, delivering high porosity, stability, and ionic transport performance.
Explore Line SpecsDetailed technical answers to common queries regarding regulatory standards, chemical processing, and plant commissioning in Central and Eastern Europe.
Our standard 2200mm solar film extrusion lines require an installation space of approximately 35 meters in length, 6 meters in width, and 4.5 meters in height. The installed power capacity ranges from 380 kW to 550 kW, depending on the feed rate. For operation in industrial zones around Belgrade or Niš, Gwell provides transformers and active harmonic filters to ensure compliance with the Serbian electrical grid code.
EVA resin contains organic peroxides that initiate crosslinking at temperatures above 115°C. Gwell designs its screws with a low compression ratio, deep channels, and specialized barrier flights. This design minimizes internal friction and shear heat, keeping the melt temperature below 95°C. In addition, an integrated oil heating-cooling circuit provides precise control within each zone of the barrel (±1°C accuracy).
POE has a lower friction coefficient compared to EVA, making it prone to slippage on casting rollers. Gwell solves this issue by applying a micro-matte surface texture to the casting roller and incorporating an air-knife system. The air-knife secures the molten POE film against the roller surface as it exits the T-die, preventing edge necking and ensuring uniform cooling.
We provide complete installation support, including plant layout design, utility routing diagrams, and electrical installation assistance. Once the machinery arrives at your factory in Serbia, Gwell dispatches specialized startup engineers for commissioning and crew training. Our European service center and regional partners ensure fast delivery of critical spare parts, minimizing downtime.
Contact our technical sales team for comprehensive plant designs, raw material calculations, and custom machinery quotations.