Applications of Versalis Greenflex FD 50 EVA in Industrial Manufacturing

Versalis Greenflex FD 50 EVA, based on renewable feedstock, delivers sustainable processability and performance consistency across rigorously regulated industrial sectors. Our experience as primary producers enables us to precisely support manufacturers seeking bio-based ethylene vinyl acetate specifically engineered for demanding production chains. Below are core industrial routes where FD 50 EVA demonstrates proven downstream value and compliance.

1. Solar Photovoltaic (PV) Encapsulation Films

Solar panel manufacturers use FD 50 EVA as the matrix in encapsulation films to ensure long-term module durability and light transmission stability. The material’s controlled melt flow, crosslinking behavior, and clarity allow it to meet reliability standards pivotal for PV module output retention, especially in high-temperature and high-UV environments. Our technical guidance includes thermal lamination and peroxide crosslinking parameters, allowing fine-tuning with focus on adhesion, acetic acid content thresholds, and aging resistance.

Industry compliance standards

• IEC 61215 (Crystalline Silicon Terrestrial PV Modules)
• IEC 61730 (PV Module Safety Qualification)
• UL 61215 & UL 61730 (North America compliance)
• RoHS Directive 2011/65/EU (Hazardous Substances in Electrical Equipment)

Typical usage ratio

• 70–95% of the encapsulant film total mass, often blended with curing agents at 3–5% and adhesion promoters below 1%, subject to module architecture and process constraints.

Downstream process integration

• Thermoplastic extrusion into film, then in-line lamination onto solar cell stacks; peroxide crosslinking follows inside vacuum laminators under 140–160°C thermal cycles prior to module framing.

Final product types

• PVC-free solar PV encapsulation sheets
• Monocrystalline and polycrystalline panel modules
• Bifacial and PERC solar modules

2. Footwear Midsole Foam Production

Athletic and casual shoe manufacturers leverage the FD 50 EVA grade to achieve consistent cell structure and lightweight properties required in technical midsoles. Bio-based content aids eco-labeling and supports supply chain sustainability targets. The resin responds predictably to foaming agents and crosslinking systems, and its vinyl acetate content influences resilience, flexibility, and compression set essential in mass-produced EVA-based footwear.

Industry compliance standards

• ISO 20871:2018 (Footwear Sustainability Assessment)
• OEKO-TEX® Standard 100 (Product Safety in Textile & Footwear)
• REACH Regulation (EC) No 1907/2006
• California Proposition 65 (Chemicals of Concern in Consumer Products)

Typical usage ratio

• 55–85% of the midsole batch, adjusted for targeted hardness and cell size; organic blowing agents incorporated at 2–7%, crosslinking catalysts at 1–3% based on sole design.

Downstream process integration

• Direct blending with compounding additives; foam molding via compression or injection with in situ crosslinking and steam curing procedures tailored to footwear lines.

Final product types

• Lightweight midsoles for athletic shoes
• Children’s and casual EVA-based footwear
• Antistatic and orthopedic molded soles

3. Hot Melt Adhesives (HMA) for Packaging and Bookbinding

In industrial adhesive compounding, FD 50 EVA forms the base polymer for hot melt recipes requiring precise bonding strength, viscosity control, and thermal resistance. The bio-based EVA’s consistent melt characteristics reduce yellowing, support FDA-certified blends, and allow precise tackifier and wax incorporation for automated packaging and high-speed bookbinding lines, where block consistency and set time directly impact run rates and defect rates.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives – Indirect Food Contact)
• EN 923 (Adhesives Terminology & Test Methods)
• $ASTM D1876$ (Peel Resistance of Adhesives by T-Peel Test)
• ISO 9001:2015 (Documented QC for Adhesive Manufacturing)

Typical usage ratio

• 30–45% in final HMA formulations; tackifiers from 25–45% for packaging, waxes or plasticizers 10–20% for viscosity and open time control.

Downstream process integration

• Polymer melt compounding and in-line extrusion pelletization; hot melt blocks or pillows filled to packager, melted in-situ inside high-speed dispensing lines at 160–180°C.

Final product types

• Hot melt adhesives for folding cartons and case sealing
• Spine adhesives for perfect-bound books and catalogues
• Food and beverage carton closure adhesives meeting indirect contact standards

4. Flexible Film and Sheet Extrusion for Agricultural Use

Producers of agricultural film use FD 50 EVA for tunnel and greenhouse covers demanding excellent transparency, durability under UV exposure, and mechanical strength at varying film gauges. The resin’s vinyl acetate content facilitates frost resistance and stabilization of additives, while the high melt elasticity helps achieve even film thickness across wide rolls critical for field installation.

Industry compliance standards

• EN 13206:2023 (Plastic Covered Greenhouse Films)
• Directive 2008/1/EC (Emissions for Industrial Installations)
• ISO 9001:2015 (Film QC and Traceability Systems)
• GMP EC No 2023/2006 (Good Manufacturing Practice for Materials Intended for Food Contact, for mulch/cover films used with edible crops)

Typical usage ratio

• 10–35% of total formulation, coextruded with LDPE or LLDPE to reach required flexibility, optical properties, and service temperature range.

Downstream process integration

• Feedstock introduced during blown film coextrusion; mixed with UV stabilizers and anti-drip agents prior to bubble blowing and winding for large field roll production.

Final product types

• Greenhouse covering films
• Thermo-regulating tunnel films
• UV-stabilized agricultural mulch sheets

5. Wire & Cable Insulation Compounding

Cable manufacturers rely on FD 50 EVA as the core polymer for low-voltage and control cable insulation, especially where flexibility at low temperatures and flame retardancy are essential. Its defined melt properties and vinyl acetate content allow accurate blending with fire-retardant fillers without compromising insulation resistance, process speed, or compounded product stability across storage and installation cycles.

Industry compliance standards

• IEC 60502-1 (Power Cables with Extruded Insulation)
• UL 62/UL 1581 (Flexible Cords & Cables Requirements)
• RoHS Directive 2011/65/EU
• EN 50363-4-1 (EVA Compounds for Cable Insulation & Sheathing)

Typical usage ratio

• 25–60% of the insulation compound by mass, with flame retardants and plasticizers adjusted based on target flexibility and flame performance ratings.

Downstream process integration

• Compounded via twin-screw extrusion with full dry blending of EVA, flame retardants, antioxidants, and pigments prior to cable jacketing extrusion in continuous or batch lines.

Final product types

• Flexible control and instrumentation cables
• Power cable primary insulation
• Halogen-free, flame-retardant cable jackets