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Foundite is a supply chain manufacturer that provides "materials + equipment" for laminated glass and safety glass production

Hidden inside the glass, the "all-rounder" EVA, how did it manage to occupy a market worth hundreds of billions of yuan?

Ⅰ.Hidden inside the glass, the "all-rounder" EVA, how did it manage to occupy a market worth hundreds of billions of yuan?

The global EVA film market is expected to exceed 100 billion yuan by 2025, with China becoming the core supplier with a production capacity share of over 60%. As a manufacturer deeply involved in EVA glass interlayer films, we are often asked: why has EVA continued to break through in the photovoltaic and building sectors amidst competition from materials like PVB and SGP? The answer lies in its three core advantages: PID resistance, flexible crosslinking system, and multi-component composite capabilities—these are precisely the key technical terms currently attracting the most attention in the industry.

Unlike the moisture-sensitive characteristics of ordinary PVB, the high moisture resistance of EVA glass interlayer films has already been proven by the market. Especially after the global implementation of the new PID resistance standard in 2025, we have significantly improved the volume resistivity of our products by optimizing the ratio of coupling agent, crosslinking agent, and co-crosslinking agent (1.5:1:1 optimal ratio), perfectly avoiding the efficiency degradation problem of photovoltaic modules caused by humid and hot environments. This technological upgrade is no accident: research by institutions in Nanjing and elsewhere has long confirmed that long-chain coupling agents containing unsaturated double bonds can enable EVA to form a "chemical bond-level bond" with glass. The composite stabilizer we added on this basis further improves the ultraviolet absorption efficiency to 98.5%, taking into account both weather resistance and photoelectric conversion protection.

                Hidden inside the glass, the all-rounder EVA, how did it manage to occupy a market worth hundreds of billions of yuan? 1

II. The Photovoltaic Industry: From "Encapsulation Fundamentals" to "Core Efficiency Enhancement"

Photovoltaic applications account for 89% of the EVA film market, while double-glass modules and BIPV (Building Integrated Photovoltaics) are becoming new engines driving demand growth. The demand for BIPV is projected to reach 7.2% by 2025, largely due to the technological adaptability of EVA interlayer films:

PID Resistance Customization:

For projects in tropical climates, we offer a series of low-VA content (18%-24%) products. After 1000 hours of damp heat aging testing, the adhesive strength showed no significant decrease, resolving the delamination issue common with traditional EVA in high-temperature and high-humidity environments.

Efficiency Enhancement Technology Integration:

Integrating light-frequency conversion materials into the formulation enables the EVA film to convert ultraviolet light into visible light, delaying aging and improving module photoelectric efficiency. Combined with a white efficiency-enhancing film solution, this achieves a 25% penetration rate breakthrough in distributed photovoltaic scenarios.


Ultra-Thin Breakthrough:

Following industry trends, we have launched 280μm micro-thin products, reducing costs by 15% compared to traditional 330μm films without affecting cross-linking and adhesion performance.

It is worth noting that in double-glass modules, our EVA film, with its compatibility with zero water vapor transmission rate of glass, has become a cost-effective alternative to some POE materials, especially in framed designs.

Hidden inside the glass, the all-rounder EVA, how did it manage to occupy a market worth hundreds of billions of yuan? 2

III. Construction: Enabling Glass to Combine Safety, Aesthetics, and Function

If the photovoltaic field tests EVA's "durability," the architectural field showcases its "creativity." As a core material for switchable glass and decorative laminated glass, EVA's composite capabilities are redefining architectural aesthetics:

Safety and Design in Harmony:

Complementing the high rigidity of SGP, our EVA film can easily embed fabrics, metal mesh, printed PET films, etc., into the glass interlayer, achieving a unified "safe and splash-free + artistic expression" in shopping mall windows and interior partitions—an advantage that PVB materials cannot match;

BIPV Integrated Solution:

In photovoltaic curtain wall projects, our transparent EVA film ensures over 85% light transmittance while stably encapsulating solar cells, enabling the building facade to simultaneously generate electricity, meeting the needs of green buildings such as hospitals and office buildings;

A Choice for Detail-Oriented Individuals:

For damp spaces such as swimming pools and bathrooms, EVA's edge stability completely solves the delamination problem of ordinary PVB, and by adjusting haze parameters, it can also provide a stepless "privacy-lighting" adjustment solution for office partitions.

IV. 2026 Buying Guide: Avoiding Common Mistakes and Choosing the Right EVA Membrane

As manufacturers, we've found that many customers still hold the misconception that "EVA is only suitable for low-end applications." Based on the latest industry standards, please keep these three key selection points in mind:

Check for PID resistance certification:

Look for products that comply with the 2025 versions of European, American, and Chinese standards, focusing on verifying the adhesive strength and volume resistivity data after damp heat aging;

Inquire about the crosslinking system configuration:

For photovoltaic projects, prioritize formulations containing TAIC co-crosslinking agents (the optimal ratio is 0.5% crosslinking agent + 0.6% co-crosslinking agent). For building decoration projects, pay attention to whether the coupling agent type is compatible with the composite material;

Calculate the total life cycle cost:

Although the unit price of EVA is lower than that of SGP, high-quality products (such as high thermal conductivity models containing rare earth modifiers) can extend the module/glass lifespan by 5-8 years, resulting in a lower overall cost.

Ⅴ.Conclusion: Unlocking More Possibilities Through Technological Innovation

From the "anti-attenuation guardian" of photovoltaic modules to the "creative carrier" of architectural design, the value of EVA glass interlayer is being rediscovered. In 2025, we will continue to deepen our expertise in recycling technology (aiming for a 95% material recycling rate) and low-carbon formulations to address the EU's CBAM carbon cost challenges while providing global customers with solutions more aligned with dual carbon objectives.

If you are looking for EVA encapsulation films for BIPV projects, or require custom-colored films for decorative laminated glass, please contact us—using professional EVA technology to ensure every piece of glass combines performance and temperature control.

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Foundite is an optical grade TPU complete industrial ecological chain enterprise, with independent intellectual property rights from raw material granule synthesis to extrusion film forming to component application. The EVA film and TPU bullet-proof film produced by the company are widely used in ordinary architectural glass, decorative glass, bullet-proof and explosion-proof glass, high-end architectural safety glass and other fields....
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