Eva Film Series

In today's complex social environment and the wave of rapid technological development, safety protection has become the focus of attention in many fields. Bulletproof glass film, as an important innovative material in the field of safety protection, is relying on its excellent performance and high customization flexibility, starting from vehicle safety protection and gradually expanding to a wider range of applications.

Although civilian cars rarely encounter extreme dangers in daily life, accidents such as traffic accidents and malicious collisions occur from time to time. Bulletproof glass TPU interlayer can greatly enhance the impact resistance of automotive glass. During a collision, ordinary glass is prone to shattering and splashing instantly, causing secondary damage; while glass with TPU interlayer, even if it is strongly impacted, the fragments will be adhered to avoid hurting people, gaining buffer time for drivers and passengers, reducing the risk of casualties, and adding a sense of security to daily travel.

There are obvious differences between EVA photovoltaic film and semipermeable membrane in many aspects. From the material nature, EVA photovoltaic film is a functional film made of ethylene-vinyl acetate copolymer as the main raw material through extrusion casting process. It is mainly used for photovoltaic module encapsulation, which plays a role in protecting the battery cells and improving the photoelectric conversion efficiency; while semipermeable membrane covers a variety of materials, such as polymers, biofilms, etc. Its core feature is to allow some substances to pass through and block other substances, playing the role of separation and filtration in different fields. In terms of application scenarios, EVA photovoltaic film focuses on the photovoltaic industry, which directly affects the service life and power generation performance of solar cells; semipermeable membranes are widely used in water treatment, chemical separation, biomedicine and other fields, such as seawater desalination, hemodialysis and other scenarios. In terms of performance, EVA photovoltaic film focuses on transmittance, weather resistance, and bonding strength; semipermeable membranes pay more attention to selective permeability, permeation flux and mechanical strength. These differences make the two membranes play an irreplaceable and key role in different industries.

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EVA photovoltaic film is mainly used in solar photovoltaic modules to encapsulate and protect solar cells. It is usually transparent and has good light transmittance, allowing a large amount of sunlight to pass through and be absorbed by the cells and converted into electrical energy. Its material properties determine that it has a high refractive index and optical uniformity to ensure that the light can evenly irradiate the cells after passing through the film, thereby improving the photoelectric conversion efficiency. At the same time, the EVA film has a certain degree of adhesion, which can firmly bond the cells together and fit tightly with the outer materials such as glass to form a sealed whole, preventing impurities such as water vapor and dust from entering, protecting the performance and life of the cells, and semi-permeable membranes are mainly used for separation, filtration or control of the transmission of substances. It allows some light to pass through, while having the characteristics of selective permeability to other substances. For example, the cell membrane in an organism is a semi-permeable membrane that can control the entry and exit of substances and maintain the stability of the intracellular environment. In the industrial field, semi-permeable membranes can be used in processes such as seawater desalination and solution separation. Through the selective permeability of the membrane, substances of different components can be separated or purified. The permeability of a semipermeable membrane depends on factors such as its material, pore size, and surface characteristics. Different types of semipermeable membranes vary greatly in the types of substances that can be transmitted and the rate of transmission.
In general, EVA photovoltaic films mainly focus on light transmission and encapsulation protection to improve the power generation efficiency of solar cells; while semipermeable membranes mainly focus on the separation, filtration, or controlled transmission of substances, and their functions and application scenarios are completely different from those of EVA photovoltaic films. The differences in materials, performance, and uses between the two make them play an important role in their respective fields.

In the fast-paced world of modern production and life, high-quality materials are often the key to improving efficiency and optimizing user experience. From food preservation to photovoltaic power generation, from electronic product protection to building waterproofing, one material has consistently demonstrated its exceptional performance across various industries—EVA film. Today, let's unveil the secrets of this "all-round material" and see how its unwavering strength is reshaping new benchmarks for industry applications!

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When "flexibility" meets "toughness," it redefines material plasticity.


When it comes to film, many people think of it as fragile and easily breakable. However, EVA film defies this stereotype. Made from ethylene-vinyl acetate copolymer, it combines the stability of plastic with the flexibility of rubber. The flexible adjustment of its VA content allows it to be both a "tough defender" and a "soft companion."


With a gentle bend, it easily conforms to complex surfaces, remaining resistant to cracking even after repeated folding. In the face of external impact, it acts like a "buffer armor," rapidly absorbing the force. This is why precision electronics manufacturers favor it: using EVA film to package components like mobile phones and headphones prevents bumps and collisions during transportation from damaging the core, perfectly protecting every element of its exquisiteness.


Even more surprising is its high transparency. Through the film, the color and texture of the item are clearly visible, allowing you to directly assess the product's quality without unpacking it. In the food packaging industry, EVA film is a true beauty icon: the golden, fluffy texture of bread, the freshness and plumpness of fruit, and the delicate texture of pastries are all perfectly displayed through EVA film, instantly catching consumers' attention and adding significant value to the product.


Transcending application scenarios, it's an "all-round partner" in multiple fields.


From frozen warehouses at temperatures dozens of degrees below zero to outdoor construction sites under scorching sun; from medical environments with stringent sterility requirements to photovoltaic power plants striving for efficient power generation—EVA film, with its exceptional environmental adaptability, has become an "all-rounder" across multiple applications.


In the food industry, it's an "invisible steward" that extends shelf life. Its optimal air and moisture permeability allows fruits and vegetables to "breathe freely" within the packaging, dissipating excess moisture and odors, ensuring they remain fresh and juicy even after days of storage. In frozen food packaging, its low-temperature resistance shines through, remaining soft in temperatures down to -30°C and resisting brittle cracking due to low temperatures, ensuring worry-free transportation and storage of frozen foods. In the construction and agricultural sectors, EVA film is a reliable barrier to quality. As a roof waterproofing material and basement moisture-proofing material, it effectively blocks rain and moisture, protecting buildings from water seepage and mold. As greenhouse covering film, its excellent light transmittance allows sunlight to fully nourish crops while simultaneously locking in the internal temperature, creating a warm growing environment for crops even in the cold winter, contributing to high yields and increased income.

In the photovoltaic and medical fields, it is a core driver of performance. As an encapsulation material for photovoltaic modules, EVA film not only offers excellent light transmittance, maximizing power generation efficiency, but also offers resistance to outdoor UV rays, wind and rain, significantly extending the module's lifespan. In medical settings, EVA film, being non-toxic, odorless, and having strong barrier properties, is an ideal choice for disposable syringes and pharmaceutical packaging, effectively isolating microorganisms and dust, safeguarding medical safety. A Green Future: Leading the Industry with Sustainability


At a time when environmental protection is gaining widespread recognition, EVA film not only offers exceptional performance but also stands out with its recyclable and low-pollution features, making it a true champion of green development. Unlike some difficult-to-degrade plastic films, EVA film can be recycled and reused through specialized processes, effectively reducing resource waste. During production, companies continuously optimize processes to reduce energy consumption and pollutant emissions, ensuring that every roll of EVA film carries an environmental responsibility.


Whether enhancing product competitiveness for food companies, reducing operational costs for photovoltaic manufacturers, or providing enhanced protection for construction projects, EVA film, with its high performance, versatility, and sustainability, has become a valuable aid in the upgrading and development of various industries.


Now, this EVA film, adaptable to diverse needs and unlocking endless possibilities, is ready to partner with more companies. Whether you're a merchant pursuing packaging excellence or a manufacturer committed to technological innovation, choosing EVA film means choosing the dual guarantee of performance and quality, and choosing to join a green future!

Project Background


Located in a prime commercial district, this project is a multi-functional commercial complex integrating offices, retail spaces, and restaurants. To enhance space utilization and create a high-end aesthetic, the developer required the office meeting rooms, exhibition halls, and retail shop partitions to possess three functions: privacy switching, light control, and security protection. Furthermore, the materials needed to be suitable for a high-temperature, high-humidity climate, while also adhering to strict cost controls. After multiple rounds of material selection and comparison, EVA laminated smart dimmable glass was ultimately chosen as the core partition material.



Material Selection: Why was EVA smart glass chosen?

The project team compared PVB smart glass and EVA smart glass, and the core reasons for ultimately choosing the latter are as follows:


1. Adaptability to high-temperature construction and operating environments.
The temperature at the project construction site often reaches above 35℃. The processing temperature of EVA film is only 115℃, far lower than the 135℃ required for PVB film, thus avoiding the failure of the PDLC liquid crystal dimming layer due to high-temperature processing. At the same time, EVA film has excellent resistance to heat and humidity, and is less prone to delamination and yellowing in high-humidity climates, ensuring long-term stability.


2. High cost-effectiveness to meet commercial project budgets.
Compared to PVB smart glass, EVA smart glass reduces costs by approximately 20%. In large-scale applications for the project, this significantly reduces material procurement costs, meeting the cost control requirements of the commercial complex.


3. Multifunctional features to meet project needs.
The selected EVA film has a 90% UV blocking rate, protecting office furniture and exhibition items from fading due to sun exposure; it also provides sound insulation, blocking noise from public areas of the shopping mall and enhancing the tranquility of office and meeting spaces; and in case of glass breakage, the fragments are firmly bonded by the EVA film, meeting the safety protection standards for commercial premises.



Project Implementation Highlights:
1. Customized Dimensions and Processing.
To meet the needs of curved partitions in conference rooms and extra-large display walls in exhibition halls, EVA dimmable glass supports large-size customization and hot bending processing up to 2m × 3.6m. This allows for seamless partitions without splicing, enhancing the overall aesthetics of the space.

2. Fast Construction and Installation.
EVA dimmable glass uses a dry lamination process, shortening the processing cycle by 30% compared to PVB dimmable glass. Combined with magnetic smart switches during on-site installation, construction efficiency is significantly improved, and the overall project duration is controlled within 15 days, perfectly meeting the schedule requirements before the opening of the complex.

3. Convenient Post-Project Maintenance.
After project completion, EVA dimmable glass only requires regular wiping and cleaning, without the need for special maintenance. For one piece of glass with minor scratches due to transportation, the contractor directly replaced the dimmable layer without replacing the entire glass panel, significantly reducing future maintenance costs.



Project Implementation Results:
1. Significantly improved spatial flexibility:
The meeting room partitions can be switched between "transparent" and "frosted" modes with a single click: the transparent state ensures ample natural light, while the frosted state creates a private environment for discussions; the exhibition hall partitions, when frosted, can be used as projection screens to display brand promotional videos, and when transparent, they showcase the exhibits inside, achieving "two uses for one wall."

2. Significant energy saving and environmental benefits:
The heat insulation performance of the EVA film reduces air conditioning energy consumption in the office area by approximately 15%, and the UV blocking function reduces exhibit maintenance costs, aligning with the green operation concept of the commercial complex.

3. Highly recognized by the market:
After the project was put into use, its intelligent and aesthetically pleasing spatial effects made it a benchmark case for intelligent partitions in commercial complexes in the core business district, attracting many companies to visit and learn from it.



Case Summary
This project, through the large-scale application of EVA dimmable glass, verified the material's suitability and superiority in high-temperature, high-humidity climates and large-scale commercial settings. Its cost-effectiveness and multi-functional features make it an ideal solution for smart partitions in commercial complexes and high-end office buildings, providing replicable practical experience for the market promotion of EVA dimmable glass.

Shengding Advanced Materials is a high-tech enterprise specializing in polymer film materials. The company independently researches, develops, and manufactures modified EVA laminating films. Using ethylene-vinyl acetate copolymer as the base material and combined with specialized weather-resistant additives, these films are produced through a dust-free, precision extrusion process. They are available in three main series—High-Temperature Ultra-Transparent, Low-Temperature Photovoltaic, and Colorful Decorative—and are suitable for a wide processing temperature range of 90–130°C, offering outstanding value for money.

The products feature a light transmittance exceeding 90% with uniform and soft light transmission. Enhanced with a UV-resistant formulation, they resist yellowing and delamination during long-term outdoor use. They exhibit strong adhesion to glass and can firmly hold glass fragments in place after laminated glass breaks. These products combine sound insulation, thermal insulation, and impact-resistant safety features with resistance to high and low temperatures, moisture, and weathering, making them suitable for long-term use in environments with significant temperature fluctuations. The high-temperature, ultra-transparent variant is suitable for high-end curtain walls, sunrooms, and art glass; the low-temperature variant is suitable for photovoltaic encapsulation and dimmable glass; the colored series offers customizable options in multiple colors for landscape railings, interior partitions, and glass furniture, enriching decorative design effects.

The company operates standardized, dust-free production lines and conducts comprehensive performance testing in its professional laboratory. The products comply with environmental standards, and specifications and thicknesses can be customized to meet specific needs. They are compatible with various laminating oven equipment, ensuring stable supply. Widely sold in domestic and international architectural decoration and new energy processing markets, these products provide a mature and reliable bonding solution for laminated glass processing.