Applications of LOTTE Chemical SEETEC VC590 EVA in Industrial Manufacturing

LOTTE Chemical SEETEC VC590 EVA (ethylene-vinyl acetate copolymer) provides reliable performance for manufacturing sectors requiring materials with high flexibility, impact resistance, and clean processing. The following sections present targeted real-world industrial use cases where this grade demonstrates proven value in sustaining quality and regulatory compliance across global downstream markets.

1. Photovoltaic Module Encapsulation Films

VC590 EVA functions as the critical encapsulation layer in solar photovoltaic (PV) module production—providing durability, strong adhesion to glass and cells, and UV resistance. Its balanced melt flow allows for bubble-free lamination and excellent electrical insulation. Reliable performance in thermal stability and transparency ensures these films meet demanding outdoor exposure requirements.

Industry compliance standards

• IEC 61215 — Terrestrial PV modules – Design qualification
• UL 1703 / UL 61730 — Safety standards for PV modules
• RoHS Directive (2011/65/EU) — Restriction of hazardous substances
• TUV Rheinland PV Testing Standards

Typical usage ratio

• Used at 65–75 wt% as the main encapsulant layer in film formulations; actual ratio adjusted according to panel size, desired film thickness (typically 420–550 microns), and additives for UV or thermal stabilization.

Downstream process integration

• Blown or cast extrusion into rolls, then direct lamination with solar cells and glass under vacuum and heat (typically 140–155°C for 20–25 mins) in module assembly lines.

Final product types

• Crystalline silicon PV modules
• Thin-film solar modules
• Building-integrated photovoltaic (BIPV) glass panels

2. Hot Melt Adhesives for Packaging

This grade supports high-speed packaging operations by offering a controlled and consistent melt viscosity, rapid set time, and clean application without stringing or charring. Used primarily in EVA-based hot melt adhesives (HMAs), the copolymer's flexibility ensures secure bonding across corrugated boxes, consumer product wraps, and specialty packaging, while meeting regulatory constraints for food-exposed applications.

Industry compliance standards

• FDA 21 CFR 175.105 — Adhesives for food packaging
• REACH Regulation (EC 1907/2006)
• EN 13432 — Packaging recoverable through composting and biodegradation (when used with compatible additives)

Typical usage ratio

• Ranges from 22–40 wt% in finished HMA formulations, adjusted by compatibility with waxes, tackifiers, and application method. Higher vinyl acetate content allows for flexibility adjustment according to end use.

Downstream process integration

• Melt blending with resins, tackifiers, and waxes in industrial mixers, then extruded and pelletized before application via heated glue guns or roller coaters in high-speed packaging lines.

Final product types

• Carton and case sealing adhesives
• Labeling adhesives
• Bookbinding hot melts

3. Cable Sheathing and Wire Compounding

Electrical cable manufacturers compound VC590 EVA for primary and secondary insulation layers in power and signal cables. The polymer provides flexibility and impact protection, and resists elongation and cracking, enabling consistent extrudate surface finish. Stable die swell and thermal stability allows it to maintain tight dimensional tolerances for both low- and medium-voltage cable requirements.

Industry compliance standards

• UL 1581 — Reference standard for electrical wires, cables, and flexible cords
• IEC 60228 — Conductors of insulated cables
• RoHS Directive (2011/65/EU)
• VDE 0207-20 — Insulating and sheathing compounds for cables

Typical usage ratio

• Commonly compounded at 45–70 wt% in cable insulation blends. Ratio varies according to flammability, flexibility, and dielectric requirements, often with mineral fillers and flame retardants.

Downstream process integration

• Compounded in twin-screw extruders with additives, fillers (e.g., ATH), and stabilizers, then extruded onto copper or aluminum conductors using continuous or tandem extrusion processes.

Final product types

• Power cable sheathing
• Flexible data communication cable jackets
• Coaxial cable insulations

4. Injection Molding for Footwear Midsoles and Soles

Manufacturers select this EVA grade for foamed and non-foamed midsoles in performance and everyday footwear thanks to its proven processability, resilience, and cushioning. The polymer’s elastic properties and compatibility with foaming agents ensure lightweight, energy-absorbing midsoles with durable cell structure and smooth surface finishes. It maintains compliance with consumer product safety and restricted substance requirements.

Industry compliance standards

• EN ISO 20344:2011 — Test methods for footwear
• OEKO-TEX Standard 100 — Textile and leather product safety
• GB/T 15107-2013 — Sports footwear (China market)
• REACH Regulation (EC 1907/2006)

Typical usage ratio

• Used at 55–95 wt% as the primary resin in midsole and outsole injection blends. Proportion varies depending on target hardness, flexibility, and use of blowing agents or crosslinking chemicals.

Downstream process integration

• Dry blended with crosslinkers, foaming agents, and colorants, then fed into injection molding machines or compression molders. Precise control of mold temperature and pressure creates closed-cell foam structures.

Final product types

• Running shoe midsoles
• Casual footwear soles
• Children’s sandal bases

5. Toys and Flexible Consumer Goods Molding

Producers of toys and flexible items such as erasers use this EVA copolymer for its non-toxic profile, tactile softness, and strong pigment compatibility. Its easy processing at low temperatures minimizes degradation and ensures product safety for direct skin contact or occasional mouthing by children, conforming to stringent migration and physical property standards worldwide.

Industry compliance standards

• EN 71-3 — Migration of certain elements (Safety of toys)
• ASTM F963 — Standard Consumer Safety Specification for Toy Safety
• CPSC CPSIA — Consumer Product Safety Improvement Act
• ISO 8124-3 — Safety of toys, migration of certain elements

Typical usage ratio

• Used at 70–100 wt% as the primary matrix for toys and eraser compounds. Lower loadings may combine with natural rubber for property optimization.

Downstream process integration

• Mixed with pigments, fillers, and process oils, then granulated and shaped by injection or compression molding. Surfaces may undergo post-mold washing or finishing for safety or appearance.

Final product types

• Soft toy connectors and figures
• Stationery erasers
• Flexible novelty items

6. Foam Sheet Production for Sports and Leisure Equipment

VC590 EVA enables manufacturers of sports and leisure gear to produce foam mats, yoga blocks, and flotation aids with controlled cell size, low water absorption, and cushioning. Processing creates soft-yet-durable foam sheets with excellent return resilience, making them suitable for repeated load cycles and outdoor exposure in consumer environments. Targeted compliance and batch traceability support global retail requirements.

Industry compliance standards

• EN 71-1 & 71-3 — Mechanical/physical properties and elemental migration (sports toys, mats)
• ISO 9001:2015 — Quality management for processing plants
• California Proposition 65 — Restriction of hazardous chemicals in consumer foams

Typical usage ratio

• Typically 50–98 wt% EVA with varying crosslinker, blowing agent, and pigment levels. The optimal ratio aligns with desired hardness, density, and tactile feel for finished foam sheets.

Downstream process integration

• Direct blending with azodicarbonamide or other blowing agents, crosslinkers, and pigments; heated in continuous or batch mold systems to expand, crosslink, and cure the EVA foam before cutting or die stamping.

Final product types

• Yoga mats and sports pads
• Martial arts flooring
• Floating boards and swim equipment