Applications of Versalis Greenflex FD 23 EVA in Industrial Manufacturing

Versalis Greenflex FD 23 EVA is a high-performance ethylene-vinyl acetate copolymer offering tailored properties for demanding industrial processes. Our strict production control and close supply chain integration ensure consistent input for manufacturers across critical downstream fields. Below, we provide in-depth application guidance for core sectors utilizing this material, focusing on real-world process conditions, applicable standards, formulation ratios, manufacturing integration points, and typical finished goods.

1. Photovoltaic Encapsulant Film Production

Photovoltaic module manufacturers rely on this EVA grade for encapsulant film extrusion due to its controlled melt index, appropriate vinyl acetate content, and clean profile. These features help meet encapsulation transparency, crosslinking, and lamination requirements while supporting strict traceability from resin delivery to sheet production. Our material consistently fulfills module certification criteria and process reproducibility in high-throughput extrusion environments.

Industry compliance standards

• IEC 61215 (Crystalline silicon terrestrial PV modules)
• IEC 61730 (PV module safety qualification)
• UL 1703 (PV module safety for North America)
• RoHS / REACH (Material and chemical composition compliance)

Typical usage ratio

• Encapsulant film formulations: 90–98% EVA resin by weight, adjusted based on thermal crosslinker and additive combination; the vinyl acetate content controls transparency and adhesion characteristics, so minor formulation tweaks optimize for cell type and process equipment.

Downstream process integration

• EVA resin is directly fed into twin-screw or single-screw extrusion lines; compounded with antioxidants, UV absorbers, and crosslinking agents at melt-blending stage ahead of casting or calendering into sheets; films are cooled, slit, and laminated onto solar cell assemblies with further in-line crosslinking during vacuum lamination.

Final product types

• Solar photovoltaic encapsulant films (rolls or sheets)
• Module pre-laminated composites
• Full PV modules after lamination assembly

2. Hot Melt Adhesive Manufacturing

EVA copolymers remain a cornerstone resin in automotive, packaging, and woodworking hot melt adhesive (HMA) formulations. This grade's vinyl acetate content and melt flow rate support consistent tack, open time, and thermal stability, crucial for automatic high-speed application equipment. We monitor batch quality to ensure reliable viscosity control and downstream blending behavior.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for indirect food contact)
• EN 923 / ISO 13895 (Adhesive system terminology and test methods)
• GS Mark for safety-related adhesive use in assembly lines
• ASTM D3236 (Melting point evaluation of hot melt adhesives)

Typical usage ratio

• EVA content ranges from 28–55% in HMA formulations, modulated based on tackifying resin, plasticizer, and wax type; higher ratios give increasing flexibility for pressure-sensitive applications, lower for more rigid bonds.

Downstream process integration

• The base polymer is charged into high-shear mixers with tackifiers, waxes, and stabilizers; materials are melted under controlled thermal profiles, extruded into pellets or blocks, and cooled for packaging; final HMA blocks are re-melted and dispensed on customer lines via tank cartridges or inline systems.

Final product types

• Hot melt adhesive pellets and blocks
• Pressure-sensitive adhesive pads
• Tape, packaging tape, and bookbinding adhesives

3. Foam Slipper and Shoe Sole Compounding

Footwear and sports goods manufacturers specify this EVA grade for molded or injection-foamed midsole, insole, and outsole applications where cushioning, flexibility, and surface quality must meet finished goods specifications. Our stringent filtration and trace analysis reduce gel points and imperfections in foam cellular structure, supporting quality consistency in large-volume molding lines.

Industry compliance standards

• OEKO-TEX Standard 100 (Harmful substance testing for footwear materials)
• DIN 53575 (Compression set for foamed plastics)
• ISO 20344/20347 (Personal protective equipment: footwear)
• REACH Annex XVII (Restricted substance control for consumer goods)

Typical usage ratio

• EVA base content in sole recipes typically 60–90% by weight; lower ratios for harder, more durable soles, higher for comfort cushioning in sandals and leisure shoes; manufacturers tune with foaming agents, fillers, processing oil, and color compound based on final shoe type.

Downstream process integration

• EVA is compounded in Banbury mixers with foaming agent, pigment, and processing additives; the blend is sheeted and pelletized ahead of direct injection into aluminum molds; temperature and pressure curves during foaming dictate final product density and cell structure integrity.

Final product types

• Foam slippers
• Sports shoe midsoles and outsoles
• Anti-fatigue mat insoles

4. Wire and Cable Sheath Insulation

Electrical cable manufacturers use this material for insulation and sheath compounds, targeting flexibility, low-temperature performance, and dielectric strength. Resin quality affects mixing, extrusion, and in-field service properties, especially in cold-flexible and flame-retardant applications. Our production ensures consistent flow and thermal behavior essential for uninterrupted cable coating operation.

Industry compliance standards

• IEC 60502-1 (Power cables with extruded insulation)
• UL 1581 (Electrical wires, cables, test methods)
• RoHS Directive (For halogen-free low-smoke applications)
• CSA C22.2 No. 210 (Appliance wiring material)

Typical usage ratio

• EVA comprises 15–40% of cable compound mass, balanced with flame retardants, fillers, and processing oil; lower proportions for jacketing, higher for insulation targeting increased flexibility and impact resistance.

Downstream process integration

• EVA-based compound is prepared in twin-screw extruders with precise blending of magnesium hydroxide, color masterbatch, and lubricants; molten compound coats copper or aluminum conductors via crosshead extrusion; cooling, calibration, and surface inspection finalize wire geometry before spooling.

Final product types

• Low voltage power cable insulation
• Flexible electronic wire jacketing
• Halogen-free sheathed industrial cables

5. Flexible Packaging Film Blowing

Flexible packaging converters employ this EVA resin in co-extruded film lines dedicated to food packaging, medical device pouches, and specialty film products where sealability, clarity, and freeze resistance are crucial. We maintain polymer characteristics demanded by multilayer structure manufacturers, delivering constant performance during large-scale film blowing and bag conversion.

Industry compliance standards

• EU Regulation (EU) No 10/2011 (Plastic food contact materials)
• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate resins for food packaging)
• ISO 527 (Film mechanical property testing)
• GMP EC 2023/2006 (Good manufacturing practice for food packaging)

Typical usage ratio

• EVA loadings in co-extruded films: 5–18% of structural layer, depending on target seal strength and low-temperature flexibility in the final film; higher levels used for enhanced peelability or torque-down bags.

Downstream process integration

• Pelletized resin is gravimetrically metered into blown film extruders together with LDPE, LLDPE, and other copolymers; resin is melted, homogenized, and blown into tubular films; film is slit, surface treated, and wound for bag forming or lamination.

Final product types

• Food-grade packaging films
• Frozen food pouches
• Medical device overwrap films