Applications of Versalis Greenflex ML 20 EVA in Industrial Manufacturing

As the original manufacturer of Versalis Greenflex ML 20 EVA, we supply this material to leading processors operating in high-value industrial sectors. This ethylene-vinyl acetate copolymer, produced with a focus on consistent batch quality and supply security, features a controlled melt flow suited to demanding compounding, extrusion, and molding applications. Below, we detail major downstream use cases, specifying compliance frameworks, formulation data, workflow integration, and finished products delivered by our direct industrial partners.

1. Flexible Footwear Soles (Injection Molding & Compression Molding)

Prominent athletic and casual footwear brands specify this grade in EVA foam midsole and outsole compounds due to its uniform flexibility and low-temperature elasticity. Our partners rely on its predictable melt viscosity during injection or compression molding to produce consistent, comfort-critical components, particularly where compliance to restricted substances standards must be documented in the final article.

Industry compliance standards

• ISO 20344/20345 (Safety Footwear Basic & Additional Requirements)
• OEKO-TEX Standard 100 (Annex 4, Baby Articles & Footwear)
• REACH Annex XVII (SVHC, phthalates, PAHs, restricted substances)
• US Prop 65 (California Safe Drinking Water & Toxic Enforcement Act)

Typical usage ratio

• 20–60 phr (per hundred rubber) depending on hardness target and elasticity requirements; higher EVA ratio for lightweight casual soles, lower for safety footwear requiring hardness.

Downstream process integration

• Added during initial compound mixing with fillers and crosslinking agents, then granulated and fed to injection/compression molding machines; material dispersion and plasticizer compatibility checked by rotor rheometry before batch approval.

Final product types

• Running shoe midsoles
• Comfort and safety outsole units
• Sandals and slippers soles
• Work boot insoles and outsoles

2. Hot Melt Adhesives for Bookbinding, Packaging & Woodworking

Industrial adhesive formulators select this EVA copolymer for hot melt adhesive products where precise flexibility, open time, and adhesion profiles are key, especially for applications involving coated paper, packaging films, or engineered wood panels. Its melt flow is well-suited to both drum-melting in bulk installations and smaller-scale pellet-fed applicators.

Industry compliance standards

• EN 923 (Adhesives—Terminology)
• FDA 21 CFR 175.105 (Adhesives in Food Packaging—Indirect Additive)
• PSTC/ASTM D1876 (Peel Adhesion, T-Peel Test)
• SCAQMD Rule 1168 (Solvent Emissions, California)

Typical usage ratio

• 40–80 wt% of the finished hot melt adhesive formulation, adjustable with tackifiers, waxes, and plasticizers based on tack, viscosity, and setting speed targets for different substrates and application equipment.

Downstream process integration

• Blending in jacketed mixers at 130–170°C, with incremental addition of resins and waxes; followed by pelletizing, block casting, or drum filling; final QC includes viscosity checks at application temperature and open time/window evaluation on relevant substrates.

Final product types

• Bookbinding hot melt adhesives
• Case and carton sealants
• Edge banding adhesives for engineered wood
• Pressure-sensitive labels and tapes

3. Film Extrusion for Agricultural and Horticultural Films

Producers of greenhouse and mulching films incorporate this EVA grade to enhance puncture resistance, low-temperature flexibility, and transparency. The vinyl acetate content improves film performance under UV and thermal cycling—a common challenge in outdoor agricultural settings—while complying with migration and residue limits in contact with edible crops.

Industry compliance standards

• EN 13206 (Plastic films for mulching, tunnels, and greenhouses)
• EU Regulation (EC) No 10/2011 (Plastic materials intended to come into contact with food)
• ISO 8142 (Films—Outdoor weathering test for films and sheeting)
• RoHS (Restriction of Hazardous Substances, for trace metals in agricultural products)

Typical usage ratio

• 5–15% by weight, depending on desired EVA functionalization, film gauge, and end-use field/weather conditions; precise dosage set to balance optical properties and mechanical strength.

Downstream process integration

• Direct metering and gravimetric blending into the co-rotating twin screw extruder feed, often co-extruded with LDPE or LLDPE; addition can take place at the main hopper or in multiple layers for horticultural multi-layer films; finished rolls typically tested for tear strength and UV transmittance.

Final product types

• Greenhouse covering films
• Mulching sheet for vegetable and fruit cultivation
• Low tunnel films for early season protection
• Silage wrapping films

4. Wire & Cable Sheathing and Insulation Compounds

Wire and cable compounders utilize this grade in low-voltage sheathing and insulation for household, automotive, and specialty cables, especially where resistivity at low thickness, chemical inertness, and flame retardant synergy are essential. Blending it with flame-retardant additives and crosslinkers, they achieve flexibility and mechanical stability for compliant cable constructions under harsh environmental conditions.

Industry compliance standards

• IEC 60245, IEC 60332 (Cable Insulation & Flame Resistance)
• UL 1581 (Reference Standard for Electrical Wires, Cables, and Flexible Cords)
• RoHS Directive 2011/65/EU (Hazardous Substances in Electrical/Electronic Equipment)
• EN 50525-1 (Electric Cables—General Requirements)

Typical usage ratio

• 12–30 phr in cable insulation compound; ratio set according to dielectric property targets, flame retardant loading, and processability; flexible appliance cables require higher ratio and finer dispersion.

Downstream process integration

• Dry blending or melt compounding with mineral fillers, antioxidants, and flame retardants in a co-kneader or twin-screw extruder; compound pelletized and fed to continuous extrusion lines for direct application onto wire cores; QC includes elongation at break and dielectric strength measurements.

Final product types

• Flexible appliance cords and power cables
• Automotive low-voltage wiring
• Signal and data cable sheathing
• Heat-resistant cable insulation

5. Solar Photovoltaic (PV) Module Encapsulant Sheets

PV module manufacturers deploy this copolymer as the core resin for encapsulant films, securing photovoltaic cells and providing environmental protection. Thermal stability and transparency characteristics support UV durability and lamination yield, with particular attention to crosslinker compatibility and global standards on potential induced degradation testing.

Industry compliance standards

• IEC 61215 (Crystalline Silicon PV Modules—Design Qualification & Type Approval)
• UL 1703/IEC 61730 (PV Module Safety Qualification)
• TÜV Rheinland 2 PfG 2577/06.17 (EVA Sheets for PV Modules)
• CNAS ISO/IEC 17025 (PV Encapsulation Testing Laboratories)

Typical usage ratio

• Core matrix of the encapsulant sheet, comprising 65–85% of the sheet formulation; batch adjustments made based on lamination temperature, thickness, and co-additives (crosslinkers, UV absorbers, silane coupling agents).

Downstream process integration

• Melt extrusion with exacting control of sheet gauge, addition of peroxide crosslinker on second blending stage, followed by continuous casting or calendering; film is then cut to size, and thermal lamination bonds it to cell assemblies under vacuum; routine in-line inspection covers visual clarity, gel content, shrinkage, and adhesion to glass/backsheet.

Final product types

• PV module encapsulant sheets
• Protective films for solar cell strings
• Double-glass solar module films