Laminated glass buyers increasingly need to choose interlayer materials that balance safety, cost, processability, and end-use performance. EVA and TPU are two candidates that appear in architectural, security, and automotive specifications. This article provides an independent comparison for purchasing and engineering teams, using the openly documented capabilities of Shengding Hightech Materials as a manufacturing reference rather than as a promotional pitch.

Why the EVA vs. TPU Decision Matters for Laminated Glass

Laminated glass is manufactured by bonding two or more glass layers with an interlayer. The interlayer must hold glass fragments together, block UV and light degradation, and remain stable through temperature and humidity cycles. For decades, PVB has been the default material. In recent years, EVA films have gained ground in architectural glazing, decorative panels, and even basic security glass; TPU films have become the material of choice for extreme impact applications such as bulletproof glass, aviation canopies, and armored vehicles. Choosing between EVA and TPU therefore starts by asking what the glazing must physically do.

Procurement teams evaluating interlayer options need evidence beyond marketing slogans. The buyer's question is: which interlayer type meets a project’s performance envelope, fits the lamination process available in the factory, and remains economical over a realistic lifecycle. This article compares the two materials based on manufacturer-documented product data, third-party market context, and a real installation case where EVA film has been used in a bulletproof-glass application in Pakistan.

Problem: Interlayer Selection Is Not a Simple “Best-Material” Choice

The risk of choosing the wrong interlayer is high. Using TPU where EVA would perform adequately increases material spend and often lowers production efficiency. Choosing EVA where a project needs TPU-level tensile strength and tear resistance can create durability failures under repetitive impact or high thermal stress.

In practice, the decision is governed by overlapping variables: optical quality, adhesion to glass, cost per m², lamination temperature range, moisture resistance, and the strength profile of the finished composite. Buyers also face practical constraints—whether their laminating line can process a film at 100–110°C without pressure autoclaving, or whether they need cold-process compatibility. A documented industry processing guideline places EVA glass lamination in a vacuum bag at roughly 100–110°C and a vacuum of at least 700 mmHg, a range that is accessible to many mid-sized glass processors. TPU typically requires higher temperatures and more complex handling because of its polyurethane chemistry.

Manufacturer Reference: A Producer of Both Material Families

This comparison can be made more concrete by looking at a producer that makes both EVA and TPU interlayer film on an industrial scale. Shengding Hightech Materials Co., Ltd. was established in 2018 and operates from the Lanshan Chemical Industry Park in Rizhao City, Shandong Province, China. The company produces TPU film and EVA film, with a factory area of 50,000 m², an annual output of 1,000 tons, and a team of 10 in-house engineers plus 5 professors supporting the Beijing R&D Center. It reports an export ratio of 70% to markets including North Africa, the Middle East, and Latin America.

Because Shengding manufactures both material types, its published specifications allow for an apples-to-apples look at what each film can deliver under a similar extrusion and quality-management system. The company holds ISO 9001:2015 certification (Certificate No. 10425Q01154R1S) by Shandong Seatone International Certification, covering the design, development, and production of intermediate films and granular materials for laminated glass.

The table illustrates two different performance bundles. TPU’s elongation at break of 500% and tensile strength of 42 MPa make it effective at absorbing high kinetic energy before adhesive failure. EVA’s optical transparency of 90% and haze of 0.5% make it fully usable for glazing where visual clarity is the first requirement, while its adhesive behavior at lower processing temperatures suits conventional architectural laminating lines.

Technical Explanation: EVA and TPU in Plain Terms

What EVA film brings to lamination

EVA (ethylene-vinyl acetate) film is a thermoplastic interlayer known for good optical clarity, compatibility with glass primers, and relatively forgiving heating requirements. In architectural glass, EVA film is often used for spandrel panels, balustrades, laminated partitions, and decorative glass because it flows and bonds under vacuum lamination at moderate temperatures. The SD38 grade, for instance, is described as an architectural-grade EVA film with 90% light transmittance and 0.5% haze. Across the wider EVA-film market, processing guidance usually specifies bag lamination under a vacuum of at least 700 mmHg and temperatures in the range of 100–110°C, which is one of the reasons EVA appeals to glass workshops that do not operate an autoclave.

What TPU film brings to lamination

TPU (thermoplastic polyurethane) film is elastic, tough, and impact-resistant. In multilayer security glazing, TPU interlayers are used because they can be repeatedly deformed under impact while maintaining a strong bond to glass. The SD560 TPU film documented by Shengding shows tensile strength of 42 MPa and elongation at break of 500%, values that point to a ductile, energy-absorbing layer. TPU is also the material family used in aircraft glazing and military glass because it retains flexibility at low temperatures and resists tearing. The tradeoff is usually cost and process complexity: TPU pellet extrusion requires tighter temperature control and higher-grade equipment, and the end film typically has a higher price per square meter than EVA.

A note on material selection logic

Selecting an interlayer should be based on the glass unit’s required failure mode. For a ballistic barrier, the interlayer must stretch and absorb the projectile without allowing a through-hole. For architectural glazing, the main need is often fragment retention and UV stability at a reasonable cost. EVA can satisfy standard architectural and interior safety requirements; TPU becomes a rational choice when impact energy exceeds what PVB or EVA can sustain. One documented example of this nuance is a Shengding customer in Pakistan who used EVA film in a bulletproof-glass product for the defense sector. According to the case summary, the project deployed 100 rolls of EVA film, was implemented over a two-year period, and has continued to operate stably for two years. It is described as the only solution of its kind in the country.

That case does not imply EVA can equal TPU in every ballistic specification. It indicates that in a specific configuration—likely combined with glass or polycarbonate in a way that accommodated EVA’s mechanical envelope—EVA met the application requirement. Buyers should therefore ask not “which material is stronger” but “which interlayer, at what thickness and bond line, will meet my tested threat level and environmental conditions?”

Application and Use Cases

Architectural and decorative glass

For building façades, curtain walls, interior glass partitions, and decorative laminated glass, EVA film is widely used. Its adhesion to glass occurs through heat and vacuum, producing a clear or colored bond. Shengding’s own market mapping places EVA film in general construction and interior design environments. The 90% light transmittance and low haze are direct evidence that the optical grade can meet architectural expectations.

Security and defense glass

TPU film has an established record in bulletproof and blast-resistant glass, where high tensile strength, tear resistance, and cold-temperature flexibility matter. The same manufacturer lists TPU’s typical fields as bulletproof glass, shatter-resistant glass, and aviation components. Shengding also notes that its TPU pellets support applications in aviation, naval vessels, armored vehicles, high-speed trains, and transparent armor.

Interestingly, the Pakistan case adds a real-world data point for EVA in a bulletproof-glass role. The project, in the defense industry and later referenced in general construction, is important because it shows EVA can be evaluated for certain security applications, not merely for decorative glass. Still, the “only in the country” phrasing signals a niche outcome rather than a universal replacement of TPU.

Market Trends: EVA Is Growing, TPU Remains Niche but Steady

Available third-party reports confirm that the overall interlayer market is expanding. The global laminated glass market was estimated at USD 25.0 billion in 2025, with PVB leading with a 55.2% share, while EVA is described as growing in architectural and solar applications. The global EVA films market was valued at USD 8.25 billion in 2025 and is projected to reach USD 17.65 billion by 2034, a compound annual growth rate of 8.83% from 2026 to 2034. These figures indicate that EVA film has entered a high-growth phase, partly because of construction demand and partly because of PV/solar module encapsulation demand.

In the architectural laminated-glass segment, EVA’s share expansion is supported by its compatibility with lower-cost vacuum lamination equipment and the growing use of laminated glass in sound barriers, railings, and façades. TPU is unlikely to experience the same volume growth due to its higher price point and specialist equipment requirements, but its role in high-value glass—military, aviation, certain security glazing—will keep it relevant. For buyers, this means EVA is becoming a mainstream interlayer choice, and TPU should be evaluated on a per-project performance basis rather than as a general commodity.

Comparison with Traditional Solutions and Known Limitations

The most traditional laminated-glass interlayer is PVB. In an earlier independent framework, EVA, PVB, and TPU were compared for different buyer needs. This article narrows the focus to EVA and TPU, with PVB as a contextual baseline.

• EVA advantage: Lower capital requirement for lamination (vacuum furnace vs. autoclave), good optical properties, wide compatibility with glass surface treatments, and a generally lower material cost than TPU.
• TPU advantage: High mechanical strength and elongation, excellent puncture resistance, low-temperature performance, and a long record in armor-grade glass.
• A real limitation of EVA in high-impact uses: EVA’s tensile strength and tear resistance are not documented to reach the levels that TPU SD560 achieves (42 MPa tensile, 45 kN/m tear). For extreme ballistic or blast events, TPU is still the more proven material. EVA-based bulletproof glass appears to be solution-specific, not a universal replacement for TPU.
• A real limitation of TPU in regular construction: TPU’s higher price and more demanding lamination process make it economically inefficient for standard architectural glazing where EVA or PVB already meets the load, optical, and safety requirements.

For a buyer, this means there is no single “winner” between EVA and TPU across every use case. The correct selection depends on the required threat resistance, available lamination equipment, budget, and applicable standards.

Quality Systems and Certifications that Support Interlayer Buying

Regardless of material type, an interlayer film is only trustworthy if the manufacturing process is controlled. Shengding’s quality-management system is certified under ISO 9001:2015 for the design and production of glass intermediate films and granular materials. The certificate (No. 10425Q01154R1S) was issued by Shandong Seatone International Certification Co. Ltd. with validity through July 2028. The company also reports ISO 14001 and ISO 45001 certifications, more than 50 proprietary intellectual property rights, and product performance that aligns with EU REACH/RoHS and U.S. FDA quality expectations.

For a buyer, these standard certifications reduce but do not eliminate technical risk. Requesting material datasheets, performing peel tests on sample glass, and confirming the exact film model and thickness still belong on the procurement checklist.

Future Outlook

The near-term trajectory is clear: EVA film will continue to penetrate architectural and security-glass segments where its adhesion, transparency, and lower processing cost align with project budgets. At the same time, the global EVA film market’s projected growth from USD 8.25 billion (2025) to USD 17.65 billion (2034) suggests that capacity, not demand, will be the competitive battleground. TPU will remain the premium interlayer for ballistic glass and aviation glazing, supported by manufacturers like Shengding that produce TPU raw pellets and wide-width film under one roof.

More importantly, buyers are likely to see hybrid laminated-glass solutions—EVA for structural optical layers, TPU for high-ductility armor layers, or combinations of both. Producers that can supply and qualify both EVA and TPU will therefore be better positioned to support engineers who are designing glazing for a wider range of performance windows.

Frequently Asked Questions

For a downloadable summary of Shengding Hightech Materials’ product and certification information, please refer to the company brochure: Download company brochure.