Applications of Versalis Greenflex ML 21 EVA in Industrial Manufacturing

Versalis Greenflex ML 21 EVA is a high-performance ethylene-vinyl acetate copolymer formulated specifically for demanding industrial processing. As a manufacturer with direct expertise in polymer synthesis and technical collaboration, we provide Eva ML 21 to high-volume converters who require precise control over rheology, compatibility, and regulatory adherence. Below, we detail key downstream use sectors, specifying compliance obligations, formulation guidance, integration stages, and finished product profiles.

1. Photovoltaic Encapsulation Films for Solar Panels

Leading solar panel producers use this EVA grade in encapsulant film extrusion to achieve high transparency, controlled crosslinking, and long-term resistance to yellowing and moisture ingress, all of which are critical for photovoltaic module durability and energy yield. Modern encapsulation lines demand lot-to-lot thermal and optical consistency throughout lamination and module assembly.

Industry compliance standards

• IEC 61215:2016 (Crystalline Silicon Terrestrial PV-Modules—Design Qualification and Type Approval)
• UL 1703 (Standard for Flat-Plate Photovoltaic Modules and Panels)
• REACH (EU Regulation 1907/2006 and SVHC restrictions for polymeric materials in PV applications)
• RoHS (Restriction of Hazardous Substances Directive for electrical/electronic components)

Typical usage ratio

• 60–100% in encapsulant layers, with 0–40% crosslinking or anti-UV additives; exact ratio depends on film gauge, crosslinking schedule, and optical requirements

Downstream process integration

• Used in twin-screw extrusion or calendaring to produce rollstock sheets typically 0.4–0.5 mm thick
• Inserted during panel lamination between glass, solar cells, and backsheet layers, followed by crosslinking via thermal press (140–160°C, 10–25 minutes)

Final product types

• Photovoltaic module encapsulation films (sheet, rollstock)
• Mono- and polycrystalline solar panels for residential, commercial, and utility-scale installations

2. Footwear Soling Compounds

Shoe manufacturers use the material for producing molded midsoles and outsoles in the sports, athletic, and safety sectors. Processers leverage its controlled melt flow and elasticity to achieve precise density, abrasion, and cushioning properties in both foamed and compact soling units, with the quality and health compliance monitored throughout each production batch.

Industry compliance standards

• ISO 20344:2011 (Personal protective equipment—Test methods for footwear)
• EN 71-3 (Toy Safety—Migration of Certain Elements, especially if the footwear is for children’s markets)
• REACH Annex XVII chemical restrictions (for direct skin contact articles)
• GB/T 15107-2013 (China—Shoes outsole specification)

Typical usage ratio

• 35–70% as base polymer in outsole/midsole blend, typically modified with either PE, fillers, or blowing agents to control hardness (Shore A value) and reduce weight; high ratios for soft injection foams, lower for compact outsoles and blends

Downstream process integration

• Introduced at the compounding stage with other elastomers, stabilizers, and pigments, followed by extrusion, granulation, and injection or compression molding depending on shoe type
• May include in-mold foaming (for sports shoe pads) or direct soling attachment (for technical footwear)

Final product types

• Molded EVA sports shoe soles (running, tennis, hiking, etc.)
• Cushioned technical inserts, midsoles, and full-foot beds for safety footwear
• Lightweight foamed slippers and sandals

3. Industrial Adhesives for Packaging and Woodworking

This ethylene/vinyl acetate formulation enables the production of hot melt adhesive blocks and granules used in high-speed carton closing, case and tray assembly, and engineered-wood bonding. Formulators target clean open time control, immediate setting, and reliable adhesion to polar and non-polar substrates demanded in automated packaging and furniture lines.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives—indirect food contact, for packaging adhesives in North America)
• IATA Section 3.9.2.2 (Packaging adhesives for transport of dangerous goods)
• EN 923:2005+A1:2008 (Adhesives—Terminology related to adhesives and glues in Europe)
• REACH (SVHC risk for incoming raw and outgoing adhesive products)

Typical usage ratio

• 20–45% as principal polymer in hot melt adhesive formulations, with ratio determined by desired viscosity, bond line flexibility, and compatibility with tackifiers; lower dosing for sprayable adhesives, higher for block and stick forms

Downstream process integration

• Directly fed into hot melt compounders in pellet or granule form with plasticizers and tackifiers, followed by pelletizing or molding into ready-to-use shapes
• End users apply adhesive in molten state by slot, bead, or spray applicators during box assembly or edge-gluing steps

Final product types

• Hot melt adhesive blocks/granules for carton, tray, and case closing (FMCG, e-commerce packaging)
• Glue sticks for consumer and industrial manual glue guns
• Edge banding adhesives for laminated wood panels and furniture elements

4. Wire & Cable Insulation Compounds

Cable extruders rely on this EVA copolymer as a base resin for moisture-resistant, flexible insulation and jacketing around power and communication wires. Its combination of dielectric stability, processability, and flexibility at low temperatures gives reliable long-term service in building wiring, appliance connections, and industrial harnessing where compliance with regional fire and material safety is required.

Industry compliance standards

• IEC 60227 (Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V)
• UL 62 / UL 1581 (Flexible cords and cables; Reference Standard for Safety)
• EN 50363-4-2 (Insulating materials—EVA sheathing compounds for power cables)
• RoHS (Hazardous substances in electronic/electrical applications)

Typical usage ratio

• 25–55% as primary polymer in insulation and jacketing compounds—ratio set by required dielectric strength, flexibility, and flame retardance; lower end in blends with LLDPE or crosslinked systems

Downstream process integration

• Blended with functional additives (flame retardants, antioxidants) in internal mixers, then pelletized for wire extrusion feeds
• Applied via single or co-extrusion onto copper or aluminum conductors under temperature-controlled conditions to ensure uniform wall thickness and bond

Final product types

• Building wire and cable insulation and sheathing (industrial, residential, commercial)
• Flexible appliance cords and electronic wiring harnesses
• Automotive low-voltage wire coverings

5. Flexible Foam Sheet and Mat Production

Manufacturers of protective packing, gym mats, and exercise flooring use this EVA copolymer to achieve lightweight, elastic foam structures with controlled cell size and strong rebound performance. Plant operators target specific resilience and recoverability for repeated impact scenarios, maintaining full compliance with safety and physical endurance standards.

Industry compliance standards

• ISO 14688-1 (Foamed polymeric insulation for impact and shock absorbing pads)
• EN 1177:2018 (Impact attenuating playground surfacing)
• CFR 16 Part 1303 (Lead content limits if used in child contact mats in the U.S.)
• REACH Annex XVII, PAH/Phthalate content (for foam in consumer products)

Typical usage ratio

• 55–95% as main foam-forming polymer, with dosing calibrated for target expansion (2x–10x), density (30–200 kg/m³), and application (impact protection vs. comfort); higher ratios provide softer, lighter foam

Downstream process integration

• Combined with blowing agents, crosslinkers, and color masterbatch in banbury mixers
• Directly processed in sheet extrusion or compression foaming lines, followed by post-expansion and shaping/cutting to final product dimensions

Final product types

• Shock-absorbing foam mats for gyms, playgrounds, and workstations
• Protective packaging inserts (electronics, glassware)
• Sports safety pads and flooring tiles

6. Lamination Films for Food and Medical Packaging

Flexible packaging producers use this copolymer as a primary component in multilayer films requiring high puncture resistance, clarity, and reliable adhesion between substrate layers. These applications often serve the demands of vacuum pouch, MAP (modified atmosphere packaging), and medical-grade overwraps, where inertness and regulatory screening are strictly enforced through QC and traceability systems.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymers for food contact in the U.S.)
• EU Regulation (EU) No 10/2011 (Plastic materials and articles intended to come into contact with food)
• ISO 13485:2016 (Quality management systems for medical devices—for packaging raw materials)
• GMP EC 2023/2006 (Good manufacturing practice for materials intended for food contact)

Typical usage ratio

• 15–40% as the tie-layer or sealant polymer in coextruded film lamination; percentage set by layer function, thickness, and barrier requirements—higher content for sealability, lower for tie-layer adhesion

Downstream process integration

• Pellets incorporated in multi-layer blown or cast film extrusion setups as the adhesive/sealant strata between PE/PP and barrier films (e.g., PA, EVOH)
• Thermal or pressure lamination (non-solvent) to ensure secure, contamination-free interfaces for vacuum, MAP, or sterile packaging films

Final product types

• Flexible food pouch films (vacuum bags, retort pouches, cheese/processed meat wraps)
• Sterile overwrap packaging for medical devices, surgical instruments, and pharmaceuticals
• Peelable lidding and film/tie layers for specialty trays and containers