| HS Code | 844151 |
| Product Name | Trosifol BirdSecure Pro |
| Primary Function | Bird collision deterrent interlayer for laminated glass |
| Bird Deterrent Mechanism | UV-reflective pattern visible to birds |
| Human Visibility | Pattern is subtle and minimally visible to the human eye |
| Glass Compatibility | Designed for use in laminated safety glass |
| Light Transmission | Maintains high visible light transmission |
| Uv Protection | Blocks significant UV radiation for interior protection |
| Structural Integrity | Provides post-breakage strength and impact resistance |
| Lamination Method | Compatible with standard PVB lamination processes |
| Applications | Suitable for windows, facades, and architectural glazing |
| Standards Reference | Supports bird-friendly building design guidelines |
As an accredited Trosifol BirdSecure Pro factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Trosifol BirdSecure Pro is packaged as protective rolls of PVB interlayer film, available in custom lengths and widths, per roll. |
| Container Loading (20′ FCL) | Trosifol BirdSecure Pro is loaded in a 20-foot container as palletized rolls, secured, protected from moisture, with proper ventilation and labeling. |
| Shipping | Trosifol BirdSecure Pro ships as rolled interlayer film on cores, wrapped in moisture-barrier packaging to prevent damage. Keep dry, cool, and protected from impact during transit. Use covered vehicles, secure loads properly, and store rolls upright. Not classified as hazardous for standard ground or air freight. |
| Storage | Store Trosifol BirdSecure Pro in its original, sealed packaging in a cool, dry, well-ventilated area. Protect from direct sunlight, moisture, and heat sources. Maintain recommended storage temperatures between 5°C and 35°C. Keep away from food and incompatible chemicals. Handle carefully to avoid damage, and always follow the safety data sheet guidelines. |
| Shelf Life | Store in original packaging, cool and dry. Shelf life is 12 months from date of delivery when stored properly. |
High-rise unitized curtain wall production with Trosifol BirdSecure Pro typically begins with heat-strengthened low-iron float glass in 6 mm to 12 mm thicknesses. The interlayer is stored and conditioned at 18–20 °C and 20–30 % RH for 24–48 h before lay-up. A standard build-up of 6 mm heat-strengthened glass / 1.52 mm BirdSecure Pro / 6 mm heat-strengthened glass is used for most vision and spandrel panels where wind-load deflection must remain below L/60 under the serviceability limit state. The 1.52 mm interlayer is normally assembled from two 0.76 mm plies because roll-stock handling and pattern alignment are easier to control on a two-ply lay-up. Glass substrates are washed with deionized water having conductivity below 5 μS/cm, then edge-ground with an arrissed edge of at least 2 mm to prevent razor edges from splitting the PVB during nip roll compression. The assembled stack is de-aired through a calender nip at a glass surface temperature of 60–80 °C, then autoclaved at 130–135 °C and 12–14 bar for 60–90 min. The lower autoclave temperature is deliberately held because UV-contrast markers in the interlayer may show drift above 135 °C. Published data for this specific configuration is limited, so first-article approval should include UV-A reflectance mapping and visual appearance inspection under EN ISO 12543-6. The finished laminate is tested to EN ISO 12543-2:2021 for laminated safety glass and ASTM C1172 for architectural flat laminates, while the full curtain wall unit is tested for air permeability and water penetration under EN 12153 and EN 12155. Where bird-friendly codes apply, such as New York City Local Law 15 of 2020 or LEED v4.1 Pilot Credit 55, the glazing marker is generally required to achieve a threat factor no greater than 30 in the first 75 ft above grade. The terminal product is a unitized or stick-built facade panel with a bird-visible UV marker that maintains visible-light transmittance and does not interfere with silicone structural sealant adhesion along the perimeter bite of 25–50 mm.
Point-fixed laminated glass canopies introduce stress concentration zones around articulating bolts, and Trosifol BirdSecure Pro must be selected with a thicker interlayer than wind-load calculations alone suggest. A common build-up is 8 mm heat-strengthened low-iron glass / 2.28 mm BirdSecure Pro / 8 mm heat-strengthened low-iron glass, because the 2.28 mm interlayer reduces the tendency for local necking and helps maintain post-breakage residual strength after fracture. Bolt holes are drilled with a clearance of 3–4 mm over the bolt shank, and the hole edge is polished to remove microcracks before heat strengthening. Processing through the autoclave uses a 70–90 min cycle at 12–14 bar, but the upper temperature is held at 130 °C instead of 135 °C because point-supported panels are checked for pattern registration and optical distortion more critically than framed units. The relevant structural design standard is DIN 18008-3:2013-07 for point-fixed glazing, which requires verification of stress peaks at the hole edge and limits tensile bending stress in heat-strengthened glass. In a canopy, the combined dead load, snow load, and maintenance load produce long-duration bending that allows PVB shear relaxation. The glass pane must therefore be verified for deflection under long-term modulus, not only for the initial elastic modulus. A deflection limit of L/60 under full service load is used by many suppliers to prevent visible edge creep and interlayer flow at the bolt bearing points. Because the UV-contrast pattern is more visible when the canopy is viewed from below, the marker plane is placed on the exterior-side PVB/glass interface. The terminal assembly is a point-supported glass canopy with stainless steel articulated fittings, silicone gaskets at each point, and closed-cell foam tapes around the perimeter. Published data for long-term creep of UV-marked PVB under point load is limited; fabricators should conduct static load testing at the project-specific design load and inspect for pattern distortion before final approval.
Skylight and atrium lites represent a deeper processing risk because post-breakage retention and moisture exclusion are governed by the same edges that carry snow and wind loads. A controlled overhead stack is 6 mm heat-strengthened low-iron glass / 1.52 mm Trosifol BirdSecure Pro / 6 mm heat-strengthened low-iron glass, with the PVB interlayer’s UV-contrast surface placed toward the exterior glass to withstand weathering and condensation. The cut size must compensate for the laminating lay-up geometry. A two-stage de-airing process is common: initial nip roll at 60–70 °C glass surface temperature, followed by vacuum bag de-airing for large lites above 2.5 m². Autoclave pressure is maintained at 12–14 bar for 90–120 min because thicker heat-strengthened glass and continuous long lites resist uniform heat transfer. Ramping the autoclave faster than 4 °C/min can produce edge seal failure and subsequent delamination in the PVB edge zone. The finished overhead laminate must pass the pendulum impact classification of EN 12600:2002 and the laminated safety glass requirements of EN ISO 12543-2:2021, typically achieving a classification no lower than 2B2 for glass panes above occupied areas. After autoclave, the exposed edges are sealed with a neutral-cure silicone compatible with PVB plasticizers; edge cover is not less than 6 mm in aluminium channel glazing. The terminal component is an overhead glass lite that retains broken glass fragments after impact and presents a bird-visible UV marker when sunlight strikes the upper surface. For conditioned atria with high interior humidity, a separate moisture-control strategy is required because PVB absorbs water at exposed edges. Edge seal inspection and accelerated conditioning under EN ISO 12543-4 are used to verify adhesion after high-humidity aging.
For zoological enclosure glazing and conservation observatories, avian-deterrence requirements drive interlayer specification more than wind load. Trosifol BirdSecure Pro is used in large observation panes, commonly 8 mm low-iron heat-strengthened glass / 2.28 mm interlayer / 8 mm low-iron heat-strengthened glass, to reduce visible-light obstruction while maintaining a UV-contrast signal across the full pane. The glass substrate must be selected for controlled UV-A transmission before lamination, because high-iron float glass absorbs a significant share of the 300–400 nm UV-A band and can reduce the contrast of the interlayer markers. After glass cutting and edge polishing, the laminating line operates at 24–28 °C room temperature and 20–25 % RH to prevent interlayer blocking and dust entrapment. The autoclave schedule uses 130 °C at 12–14 bar for 90 min, and the load is cooled to below 45 °C before removal to avoid moisture bloom at the PVB/glass interface. Compliance for this downstream segment combines safety glazing standards and avian-target standards: EN ISO 12543-2 for lamination integrity, ANSI Z97.1-2015 for human impact safety, and the American Bird Conservancy threat factor protocol or an equivalent bird-friendly building code. Many zoological facilities require a measured threat factor no greater than 30 and full-area coverage of the marker, not only the lower 1.2 m of glazing, because birds may approach from elevated ramps and canopy-level planting. The finished panes range from small aviary viewing windows to full-height observation walls and are placed in stainless steel or aluminium frames with soft neoprene setting blocks. Process records include roll-stock lot number, lamination line, autoclave trace, and post-lamination UV imaging. Published data for specific zoological durability at high indoor humidity is limited, so suppliers request field adhesion coupons and EN ISO 12543-4 aging checks for each batch.
| Application | Typical laminate stack | Governing standard | Critical process boundary |
|---|---|---|---|
| Curtain wall vision/spandrel | 6 mm HS low-iron / 1.52 mm BirdSecure Pro / 6 mm HS low-iron | EN ISO 12543-2, ASTM C1172 | Autoclave 130–135 °C |
| Point-supported canopy | 8 mm HS / 2.28 mm BirdSecure Pro / 8 mm HS | DIN 18008-3:2013-07 | Bolt-hole clearance ≥3 mm |
| Overhead glazing | 6 mm HS / 1.52 mm BirdSecure Pro / 6 mm HS | EN 12600:2002, EN ISO 12543-2 | Edge seal ≥6 mm silicone |
| Zoological observation | 8 mm low-iron HS / 2.28 mm BirdSecure Pro / 8 mm low-iron HS | ANSI Z97.1-2015, threat factor ≤30 | UV-A contrast across full pane |
| Exterior acoustic barrier | 6 mm tempered / 0.76 mm BirdSecure Pro / 0.76 mm acoustic PVB / 6 mm tempered | EN 1793-2:2012 | Nip temperature ≤60 °C |
| Rail windscreen | 6 mm HS / 1.52 mm BirdSecure Pro / 6 mm HS | EN 12600:2002 | Edge bite ≥15 mm |
Noise barrier glazing along highways and rail lines adjacent to vegetated corridors combines two regulatory requirements that are usually managed separately: airborne sound insulation and bird collision deterrence. Trosifol BirdSecure Pro does not function as an acoustic interlayer. When both requirements are specified, the laminate is built as a multi-layer stack such as 6 mm tempered low-iron glass / 0.76 mm BirdSecure Pro / 0.76 mm acoustic PVB / 6 mm tempered low-iron glass. The BirdSecure Pro layer is placed toward the exterior glass so that avian-visible UV contrast is not weakened by the inner acoustic layer. The lamination process must handle two PVB plies with different softening behaviour, which creates a nip-roll de-airing window narrower than a single-ply stack. Surface temperature at the nip is kept at 60 °C or lower because the acoustic interlayer can trap air and form edge bubbles if the assembly is overheated before vacuum de-airing. The autoclave cycle is extended to 120–150 min at 130 °C and 12–14 bar to ensure flow of both interlayers into the glass topography. After lamination, the noise barrier panel is tested for airborne sound insulation according to EN 1793-2:2012 and for mechanical performance under wind and snow load according to EN 1794-1:2011. The structural frame is typically hot-dip galvanized steel with neoprene gaskets and a minimum edge bite of 15 mm. The panel is installed with the BirdSecure Pro marker plane facing the vegetated habitat side. The terminal product is a transparent noise barrier segment that carries a bird-visible UV pattern and maintains the acoustic rating required by the road authority. Published project-specific data for the combined optical and acoustic stack is limited; a production-scale first article should be subjected to both EN ISO 12543-2 safety testing and EN 1793-2 acoustic testing before line commissioning.
Rail platform windscreens and pedestrian bridge glazing use Trosifol BirdSecure Pro as part of a laminated safety glass package where vibration, impact, and avian transparency are simultaneous constraints. A common build-up is 6 mm heat-strengthened low-iron glass / 1.52 mm BirdSecure Pro / 6 mm heat-strengthened low-iron glass, supplied in floor-to-ceiling panels with aluminium shoe profiles. The panels are edge-polished and clamped with a continuous bite of at least 15 mm; shorter bites produce dynamic edge pull-out under rail-induced cyclic deflection. The interlayer’s UV-contrast markers are oriented toward the platform side because bird strikes are most frequent where the glass reflects adjacent vegetation across the rail corridor. Lamination processing follows the same 130 °C/12–14 bar autoclave envelope, but extended cooling is used to below 40 °C before de-moulding because residual heat accelerates PVB shear flow when panels are stacked vertically in transport frames. The laminated glass is tested to EN 12600:2002 for impact resistance and EN ISO 12543-2 for safety glass classification. Some national rail operators additionally require a vibration endurance test or repeated load test on the complete panel assembly. The terminal component is a transparent windscreen panel that reduces wind drag on the platform and carries a continuous bird-visible UV marker. Open edges are not permitted, and each panel is factory-sealed with UV-resistant silicone to prevent moisture ingress at the PVB edge. Published data for vibration fatigue of UV-marked PVB in rail windscreens is limited, so suppliers commonly require full-size prototype installation before final approval.
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Trosifol BirdSecure Pro is a polyvinyl butyral (PVB)-based laminated-glass interlayer configured with an embedded avian-deterrent contrast domain; the pattern is positioned within the interlayer matrix rather than printed onto the glass surface after lamination. The product is intended for façade, canopy, partition, and glazed-wall applications in which bird-strike mitigation must be delivered through the laminated-glass make-up, while the outer glass faces remain conventional monolithic surfaces. Standard thicknesses follow the PVB interlayer options of 0.76 mm and 1.52 mm; roll width, pattern spacing, and pattern geometry are tied to the current manufacturer datasheet because the product is supplied as a configured interlayer rather than a generic clear sheet. The interlayer is processed on a standard PVB autoclave lamination line. Applicable laminated-glass standards include ISO 12543-2:2011, ISO 12543-3:2011, and EN 12600:2002; these standards define optical, mechanical, and safety-glazing performance at the laminated-unit level, not avian collision deterrence. Published independent test data for BirdSecure Pro as a distinct SKU are limited in open sources; the user should obtain the current technical datasheet and project-specific avian test report before specifying the interlayer.
Specification of BirdSecure Pro should not be approached as a drop-in substitution for clear PVB in a stock laminated-glass recipe. Because the contrast domain is embedded, the optical and spectral transmission of the laminated unit changes. The interlayer contributes selective ultraviolet/visible absorption or reflection designed to create avian-visible contrast; the exact spectral transmission must be measured on the intended glass stack under EN 410:2011 or ISO 9050:2003, because coatings, low-iron glass, and glass thickness alter the final transmitted spectrum. In contrast to a post-applied bird tape or frit pattern, the interlayer does not create surface topography at the external glass face; therefore, cleaning, façade-access equipment, and glass-handling operations follow standard laminated-glazing practice. The embedded pattern also cannot be repaired in service by peeling or re-applying; any lamination defect, delamination halo, or pattern displacement requires replacement of the glazed unit.
The primary material distinction is failure location and field maintainability. In a surface-applied film, the avian-contrast function is exposed at the glass surface; cleaning chemicals, mechanical scrubbers, and differential thermal expansion can create scratches, edge lift, or haze. With BirdSecure Pro, the contrast domain is encapsulated between two glass plies by the PVB interlayer. The exterior face remains glass, and the PVB-to-glass bond is the same class of adhesion joint as a clear PVB laminate, governed by ISO 12543-3:2011 adhesion testing and edge-deletion practice. For bird collision deterrence, the relevant biological performance metric is not defined by ISO 12543-3:2011; it is typically assessed through the American Bird Conservancy tunnel-test protocol or an equivalent avian collision test. A project that specifies an interlayer solely from an ISO 12543 data sheet will therefore underdetermine the bird-deterrent performance. Published cross-product comparison data against etched glass, UV coatings, and printed patterns are not uniform across glass make-ups; the pattern geometry, spacing, and spectral contrast require validation on the specified glass build.
Another difference is processing responsibility. A surface-applied film is commonly installed by an applicator after glazing fabrication, which separates the film warranty from the laminated-glass warranty. BirdSecure Pro transfers the avian-deterrent function to the lamination line, so the glass processor controls placement, edge deletion, autoclave adhesion, and final optical quality. The result is a monolithic laminated unit with no additional on-site application step, but also no ability to correct pattern alignment after the glass is joined.
| Attribute | Embedded PVB deterrent | Surface-applied film |
|---|---|---|
| Location of contrast layer | Between glass plies; protected from exterior cleaning | Exterior or interior face; exposed to cleaning and abrasion |
| Retrofit after lamination | Not possible; lamination errors require unit replacement | Possible by film removal and reapplication |
| Surface topography | No additional topography on exposed glass face | May introduce film edge, adhesive layer, or texture |
| Edge detailing | Standard PVB edge deletion and moisture sealing apply | Film edge may require separate seal or drainage consideration |
| Performance verification | Avian tunnel test and spectral measurement on full laminate | Surface durability and avian tunnel test on completed film installation |
On a production-scale laminating line, the insertion of a patterned interlayer alters two process variables: local heat absorption and air displacement during vacuum assembly. The contrast domain is not metallised and does not require an electrical connection; however, it can absorb infrared differently from the surrounding clear PVB, which shifts the time-temperature profile at the pattern boundary. Autoclave cycles for PVB laminated glass typically operate at 130 °C to 140 °C and 12 bar to 14 bar, but line-specific soak times must be confirmed by contact thermocouples placed at the glass centre and near the pattern boundary. If the patterned area lags the surrounding PVB by more than a few degrees, premature edge cooling can leave residual air at the pattern margin. The vacuum bag or nip-roller step should be adjusted to evacuate air before autoclave pressure is applied; insufficient deairing appears as small bubbles aligned with pattern edges after autoclaving.
Adhesion control on BirdSecure Pro follows the same procedures as clear PVB. Pummel adhesion testing under ISO 12543-3:2011 is used to verify the PVB-to-glass bond after lamination. The adhesion target is not a single universal pummel value; it is selected from the manufacturer’s published adhesion classes for the specified glass type, and it is influenced by edge deletion width, glass surface cleanliness, and residual moisture content. Edge deletion must extend beyond the pattern boundary; otherwise, the pattern domain can act as a pathway for atmospheric moisture at the exposed laminate edge. The exact edge-deletion width is a line-specific variable, but a margin of at least 2 mm beyond the embedded contrast boundary is commonly used as a starting point; verification by pummel and edge-bubble propagation testing is required. Residual moisture content in the interlayer before lamination should be maintained below 0.5 wt%. Storage areas are typically held at 18 °C to 22 °C and 30% to 50% relative humidity; lay-up rooms are commonly held at 18 °C to 25 °C and 25% to 35% relative humidity. If the roll is brought into a warm lay-up room from cold storage without a sealed re-acclimation interval, condensation on the interlayer surface can produce localised adhesion failure.
In high-humidity production sites, dry interlayer handling is not optional. At ambient relative humidity above 60%, PVB moisture uptake can exceed the threshold needed for reliable autoclave lamination within 8 h to 12 h depending on roll geometry and exposed surface area. The patterned contrast domain may show local differences in moisture uptake because the plasticiser distribution around the contrast material is not identical to the clear PVB matrix. A pre-lamination drying step or a dehumidified cleanroom lay-up is therefore used when the line cannot guarantee the required lay-up humidity. This is not a defect but an operational boundary: the product shifts the standard PVB process window only where pattern resolution and high-humidity lay-up intersect. Tensile property data for BirdSecure Pro as a distinct SKU are not published in open sources; standard PVB films are characterised for tensile stress-strain response under ISO 527-3:2018, but laminated-glass structural calculations generally use the laminated cross-section bending response under EN 16612:2019 or equivalent national design methods.
On vacuum-bag lines, the cold-bag draw cycle should be checked because pattern edges can seal early and trap air. A reduced ramp rate at initial vacuum is sometimes required to allow air to move laterally from the patterned area toward the bag outlet. Nip-roller lines may pre-heat the interlayer to 60 °C to 80 °C before roll pressing; the speed and nip pressure must be tuned to avoid stretching the patterned domain. Stretching changes the visual density of the avian contrast pattern and cannot be corrected after autoclaving. Batch-to-batch variance in roll diameter, storage temperature, and slitting age influences drape and vacuum closure; each slitter batch should be logged and traced to the final laminated unit for adhesion and pattern-position audits.
The specification split is the same as for other bird-deterrent laminated glass: safety retention is verified by impact test standards, while avian contrast is verified by biological or spectral test protocols. A laminated unit with BirdSecure Pro can be designated for impact safety classification under EN 12600:2002, and if required for windborne debris or forced-entry resistance, the glazed assembly is tested under ASTM E1996-23 or EN 356:2000; the interlayer does not by itself confer a fixed classification. The resulting classification depends on glass make-up, interlayer thickness, support conditions, and heat treatment. For overhead glazing, the relevant standard may be EN 14449:2005 or national safety-glazing provisions; BirdSecure Pro is not a replacement for structural ionoplast interlayers where post-breakage stiffness is the dominant design criterion. In a laminated-glass design, the interlayer contributes to post-fracture retention, but its mechanical role is defined by the glass-configuration test, not by a stand-alone interlayer property claim.
Avian collision deterrence is not codified by the same impact-test standards. The American Bird Conservation tunnel-test protocol is frequently referenced for material threat factor; a project-specific result is required because the spacing of the contrast pattern, the UV/visible reflection ratio, and the outward visual background all affect the result. Optical verification of the deterrent pattern may involve ultraviolet-visible spectrophotometry across the 300 nm to 700 nm range, depending on the avian sensitivity model used. When the façade also carries solar-performance requirements, the full laminated-unit transmission and reflectance are measured under EN 410:2011 or ISO 9050:2003. A mismatch between the avian contrast goal and the daylighting goal can arise if the pattern density is increased; iterative measurement on a full-size mock-up is used to lock the final specification.
| Standard or protocol | Scope | Limitation for avian deterrence |
|---|---|---|
| ISO 12543-2:2011 | Laminated glass safety, optical and visual quality | Does not define bird-strike threat factor |
| ISO 12543-3:2011 | Adhesion and durability of laminated glass | Does not address pattern visibility to birds |
| EN 12600:2002 | Pendulum impact safety-glazing performance | Mechanical only; no avian performance |
| EN 410:2011 | Light transmittance and solar characteristics of glazing | Needed for optical data but not collision threat factor |
| ISO 9050:2003 | Determination of light and solar transmittance of glazing | No biological or avian significance threshold |
| American Bird Conservancy tunnel-test protocol | Avian collision threat factor under controlled flight-tunnel conditions | No ISO or EN status; project-specific result |
Facade-specific edge details can override interlayer selection. In spandrel zones where the glass edge is encapsulated in a mullion or shadow-box, the avian contrast must remain on the outdoor-facing side of the interlayer stack. If the interlayer is accidentally reversed during glass assembly, the building occupant may still observe a clear or faint pattern, but the avian-visible contrast from the exterior may be reduced. Line-side control therefore includes a marker to identify the pattern orientation. The roll marking should be recorded at slitting and inspected at the lay-up table. No post-autoclave inspection method can completely compensate for pattern reversal because the laminated unit cannot be reoriented without replacement. On-site inspections of delivered units should include a mock-up illumination check from the exterior face; this is not a substitute for tunnel testing but identifies gross pattern misplacement before installation. For laminating lines that also run clear PVB and ionoplast interlayers, segregation of rolls and slitting records prevents intermix at the lay-up station; the operational cost of a reversed or misidentified interlayer is a fully scrapped laminate, not a recoverable bench repair.
