Applications of LyondellBasell Icorene EVA in Industrial Manufacturing

LyondellBasell Icorene EVA (Ethylene Vinyl Acetate) is a specialty copolymer widely used as a functional raw material across key manufacturing sectors. Below, we outline primary downstream applications, integrating specific compliance standards, practical usage ratios, process steps, and the typical finished goods produced with this polymer in each industrial channel.

1. Photovoltaic Encapsulant Film Manufacturing

Producers of solar panel encapsulation layers use Icorene EVA as the core ingredient for module protection. Its formulation ensures excellent light transmittance, electrical insulation, and durable adhesion to glass and backsheet materials. Manufacturers process EVA pellets through precision extrusion and lamination systems, tightly controlling cross-linking levels to meet demanding outdoor performance criteria required by the solar industry.

Industry compliance standards

• IEC 61215: Requirements for crystalline silicon photovoltaic modules
• UL 1703: Standard for flat-plate photovoltaic modules and panels
• RoHS Directive 2011/65/EU
• REACH regulation (EC) No 1907/2006 (purity and SVHC disclosure)

Typical usage ratio

• 70% – 90% of total encapsulant blend, depending on the desired gel content
• Tuning with 10% – 30% crosslinking agents, UV stabilizers, and added modifiers

Downstream process integration

• Pellet dosing in twin-screw extruder
• Film calendering at 60–75°C
• In-line dosing of crosslinking initiator and UV blockers
• Lamination under vacuum at 140°C for final module assembly

Final product types

• P-type and N-type crystalline silicon solar module encapsulant sheets
• Thin-film solar PV panel layers
• Flexible solar panel protective films
• Photovoltaic module edge sealants

2. Footwear Foam Midsole Production

EVA resins form the basis of lightweight, shock-absorbing foamed midsoles for sports and casual footwear. Downstream manufacturers mix the raw material with specified blowing agents, pigment masterbatches, and crosslinkers. Through batch or continuous foaming, the polymer achieves the requisite density, rebound, and durability targets found in branded shoe applications. Strict adherence to consumer safety and performance regulation guides every production step, from master formulation to end-use certification.

Industry compliance standards

• REACH (EC) No 1907/2006 — non-phthalate grade evidence
• EN ISO 20344:2011 Personal protective equipment – Test methods for footwear
• EN 71-3:2019 (Safety of toys; chemical migration limits for children’s footwear parts)
• California Proposition 65 chemical limits

Typical usage ratio

• 60% – 80% resin by weight of total foam compound
• 5% – 25% blowing agent blend
• Up to 10% color masterbatch as required by footwear design

Downstream process integration

• Batch mixing of EVA pellets, additives, and crosslinkers
• Foam molding and in situ expansion at 120–150°C
• Thermoforming into midsoles or insole sheets
• Automated die cutting and in-mold pattern embossing

Final product types

• Injection-molded midsoles for sports shoes
• Orthopedic insole foams
• Comfort foam footbeds for fashion and casual footwear
• Lightweight antistatic safety boot components

3. Hot Melt Adhesive (HMA) Compound Formulation

EVA is a critical polymeric base for forms of hot melt adhesives, widely adopted in packaging, bookbinding, woodworking, and automotive interior lamination. Industrial processors blend Icorene EVA with tackifiers, waxes, and stabilizers to tailor viscosity, open time, and bonding strength according to specific end-use requirements. Processors must select grade and ratio based on substrates encountered, with compliance to food contact tolerances often essential for the packaging sector.

Industry compliance standards

• FDA 21 CFR 175.105: Adhesives in indirect food contact applications
• BfR Recommendation XXI for food packaging adhesives
• EN 923: Adhesives – Terms and definitions
• ISO 9001 for adhesive batch traceability

Typical usage ratio

• 30% – 60% EVA base, modulated by desired viscosity and fusion point
• 20% – 50% hydrocarbon tackifier resins
• 5% – 20% compatible waxes or plasticizers

Downstream process integration

• Extruder-based compounding with direct ingredient feeding
• Melt mixing under 120–170°C controlled temperatures
• Hot melt granule or pillow formation
• Direct cylinder-fed application systems in line with packaging or binding machines

Final product types

• Pressure-sensitive packaging adhesives (carton sealing, case closing)
• Bookbinding spines for both hard and soft covers
• Automotive headliner assembly adhesives
• Textile lamination and garment interlining HMAs

4. Cable Compound Insulation and Sheathing

Cable extrusion operations select EVA copolymer for its electrical insulating properties, flexibility, and flame retardancy when properly compounded. Manufacturers incorporate this raw material as the major matrix alongside flame retardants, antioxidants, and process stabilizers. Production lines optimize melt index and vinyl acetate content for use in wire and flexible cable sheathing, always conforming to stringent safety and electrical requirements dictated by global standards for power, telecom, and construction applications.

Industry compliance standards

• IEC 60502-1: Power cables with extruded insulation and their accessories for rated voltages
• UL 1581: Reference standard for electrical wires, cables, and flexible cords
• RoHS Directive: Lead and phthalate content control
• EN 50290-2: Common test methods for cable materials

Typical usage ratio

• 45% – 75% EVA resin base in insulation or sheathing blend
• 25% – 45% flame retardants such as ATH (aluminum trihydrate)
• 1% – 5% antioxidants, dispersion aids, and pigment fillers as required

Downstream process integration

• Solid compounding via twin-screw continuous mixer
• Strand pelletizing of compound for storage
• Extrusion around copper/aluminum conductor wires at 100–140°C
• Online cross-linking (if specified) and final sheathing profiling

Final product types

• Low-smoke zero-halogen (LSZH) cable insulation
• Power cable and data cable primary insulators
• Flexible appliance cord exterior sheaths
• Mining and control cable flame-retardant jackets

5. Flexible Packaging Film Production

Film converters use EVA to modify the sealing, flexibility, and transparency of multilayer packaging films. The copolymer imparts strong hot-tack and cold-resistance in co-extruded or blown film constructions for food and medical device packing. Downstream processors control melt blending and coextrusion parameters in accordance with strict food contact laws, adjusting EVA content to optimize sealing range and product stability throughout the logistics chain.

Industry compliance standards

• FDA 21 CFR 177.1350: Ethylene-vinyl acetate copolymers for food contact
• EU No 10/2011: Plastic materials and articles intended to come into contact with food
• GMP Regulation (EC) No 2023/2006 for packaging hygiene
• ISO 22000: Certified food safety management systems

Typical usage ratio

• 10% – 30% EVA modifying layers in co-extruded films (the remainder LDPE/LLDPE/other resins)
• Up to 100% for specialty monolayer films targeting deep freeze or puncture-resistant use

Downstream process integration

• Direct pellet feeding in blown film or cast film extrusion lines
• On-line blending with LDPE, LLDPE, or special seal layers
• In-line corona or flame treatment for print adhesion where required
• Precision slitting and bag forming at end-of-line converting

Final product types

• Frozen food vacuum pouches
• Medical instrument sterile barrier bags
• Stretch film and shrinkwrap for food logistics
• Moisture-resistant pharmaceutical sachet films