Applications of LG Chem SEETEC EA19150 EVA in Industrial Manufacturing

SEETEC EA19150 EVA, formulated and produced by LG Chem, is widely selected in specialized chemical conversion sectors. The material's consistent physical properties and controlled VA content support downstream processors in meeting strict specification and quality requirements. Below we detail principal industrial application arenas where this raw material demonstrates proven value and regulatory fit.

1. Photovoltaic Encapsulant Films

EVA copolymer is the industry standard matrix for encapsulation films in solar module assembly, providing electrical insulation and protection against environmental stress. Downstream laminators and sheet manufacturers rely on the precise melt flow, clarity, and adhesion enhancement necessary to meet module durability and performance benchmarks. Batch consistency and tailored crosslinking are critical for yield and panel warranty assurance.

Industry compliance standards

• IEC 61215:2016 (Crystalline silicon terrestrial PV modules – Design qualification and type approval)
• IEC 61730 (PV module safety qualification)
• UL 1703 (Standard for Flat-Plate Photovoltaic Modules and Panels, North America)
• RoHS 2011/65/EU (Restriction of Hazardous Substances Directive)

Typical usage ratio

• Film formulations using 100% EVA granules for monolayer; additive packages (crosslinking agents, UV absorbers) at 2–8% by weight.
• Layer thickness targets: 0.4–0.6 mm encapsulant film, adjusted per module design and lamination cycle.

Downstream process integration

• In-line film extrusion or calendaring of EVA pellets, pellet feeding with masterbatch for crosslinking/UV packages.
• Lamination between glass and cell stringers prior to vacuum-hot press module assembly.
• Thermal curing at 140–155°C under vacuum, ensuring crosslinked encapsulation and optical bonding.

Final product types

• Photovoltaic module encapsulant sheets
• Flexible and rigid crystalline silicon solar panels
• Thin-film solar modules (as encapsulation layers)

2. Hot Melt Adhesives for Packaging and Assembly

EVA copolymers serve as the base polymer in formulations for industrial hot melts due to their controlled viscosity profile and compatibility with tackifiers. Companies producing adhesives for end-use in case and carton sealing, woodworking, bookbinding, and nonwoven assembly demand consistent melt performance, bond strength, and low odor. The raw material ensures cost-efficient processing and aligns with known migration safety for indirect food contact.

Industry compliance standards

• 21 CFR 175.105 (FDA indirect food additive regulation for adhesives)
• REACH (EC 1907/2006 Chemical Registration)
• EN 923:2015 (Adhesives – Terms and definitions and classification based on chemical composition and application)
• ISO 9001:2015 (Quality management systems for adhesive manufacturing)

Typical usage ratio

• EVA content in hot melt base resin: 25–50% by weight in bulk blends, adjusted based on desired open time and flexibility.
• Tackifier resins: 30–50% by weight; waxes and oil modifiers: 10–20% by weight.

Downstream process integration

• Direct batch blending of EVA pellets with tackifiers and waxes in Z-blade or sigma mixers.
• Extrusion and pelletizing or block casting for shipment to point-of-use.
• End-user application via heated glue tanks and applicators at 120–180°C depending on the substrate.

Final product types

• Hot melt glue pellets and pillows
• Industrial adhesive sticks and slugs
• Bookbinding adhesives
• Nonwoven bonding adhesives

3. Cable and Wire Insulation Compounds

Manufacturers of electrical cable insulation apply EVA copolymers for primary jacketing and sheathing, maximizing dielectric strength and flexibility. The controlled vinyl acetate content enables the required low-temperature toughness and resistance to stress cracking in power, communication, and control cables. Formulators meet industry-specific flammability and insulation performance through tailored compounding, supported by the resin’s processability in extrusion coating lines.

Industry compliance standards

• UL 1581 (Reference Standard for Electrical Wires, Cables, and Flexible Cords)
• IEC 60502-1 (Power cables with extruded insulation and their accessories for rated voltages)
• RoHS 2011/65/EU (Heavy metal and phthalate restrictions)
• EN 50363-1 (Insulating compounds based on EVA for low voltage energy cables)

Typical usage ratio

• EVA resin content: 50–95% by weight, with proportion tuned for insulation thickness, flexibility, and physical requirements.
• Addition of flame retardants, stabilizers, and processing oils: 5–30% by weight depending on regulatory class (e.g. LSZH, EPR blends).

Downstream process integration

• High-shear melt blending of EVA pellets with inorganic fillers and functional additives in compounding extruders.
• Direct pelletization for return to cable extrusion lines.
• Continuous crosshead extrusion coating onto copper/aluminum conductors at 160–200°C.

Final product types

• Power and control cable insulation
• Flexible instrumentation cable sheathing
• Low-smoke zero-halogen wire jackets

4. Foam Products for Footwear and Sporting Goods

EVA resins provide core elasticity and process stability for closed-cell molded foams. Footwear midsole, insole, and specialty sporting goods manufacturers depend on the reliable density and compression set properties produced by this grade. The material supports precision in foaming ratio, crosslinking chemistries, and mold filling for high-throughput EVA foam sheet and direct-injection part systems.

Industry compliance standards

• ISO 20344/ISO 20345 (Personal protective equipment – Test methods and specifications for safety footwear)
• GB/T 3903.1-2008 (Footwear physical testing)
• REACH (EC 1907/2006 Compliance for restricted substances)
• Oeko-Tex® Standard 100 (Textile and foam product safety)

Typical usage ratio

• EVA resin: 60–98% by weight, adjusted for target foam hardness (Shore C 20–60), mechanical properties, and anticipated loading cycles.
• Chemical blowing agents (e.g., azodicarbonamide, sodium bicarbonate): 2–8% by weight.
• Crosslinkers: 0.5–3% by weight depending on cell structure requirements.

Downstream process integration

• Batch blending of EVA pellets with foaming agents, crosslinkers, pigments, and fillers.
• Sheet calendaring or direct closed-mold injection foaming at 140–180°C under steam or platen pressure.
• Cutting, die-punching, lamination, and assembly as final production stages.

Final product types

• Sports and running shoe midsoles
• Orthopedic insoles
• Foam mats and pads (sport/fitness uses)
• Protective foam parts for athletics

5. Flexible Film and Sheet for Industrial & Food Packaging

EVA’s unique balance of flexibility, heat-sealability, and transparency makes it a recognizable material in multilayer films for food packaging, agricultural films, and medical pouches. Film converters and flexible packaging manufacturers demand strict odor, migration, and mechanical consistency to meet food safety and performance criteria under diverse production conditions, such as coextrusion and lamination.

Industry compliance standards

• EU Regulation (EU) No 10/2011 (Plastic materials intended to come into contact with food)
• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymers for food contact films)
• GMP EC 2023/2006 (Good Manufacturing Practice for materials and articles intended to come into contact with food)
• EN 1186 (Materials and articles in contact with food – Plastics)

Typical usage ratio

• EVA content in coextruded structures: 10–40% by layer, depending on film design (sealant, core, or outer layer).
• Monolayer and multilayer film thickness: 20–200 microns, controlled by application.
• Blend with LDPE, LLDPE, and other polyolefins at up to 50% for property tuning.

Downstream process integration

• Gravimetric blending prior to blown film or cast film extrusion.
• Feed into mono- and multi-layer coextrusion dies at 130–200°C, with automatic thickness and clarity monitoring.
• Lamination or in-line printing depending on packaging specification.

Final product types

• Heat-sealable food packaging films
• Medical device packaging pouches
• Agricultural greenhouse and mulch films
• Industrial wrapping and shrink sleeves