Applications of LG Chem SEETEC EA28025 EVA in Industrial Manufacturing

LG Chem SEETEC EA28025 EVA is an ethylene-vinyl acetate copolymer engineered for specialized performance in the plastics processing and compounding sector. Its material attributes—including controlled melt flow and targeted vinyl acetate content—promote value in downstream segments demanding elasticity, clarity, and processing flexibility. Here we outline authentic industrial use cases, with specific compliance, formulation, processing, and end-product details reflecting actual customer requirements.

1. Hot Melt Adhesives for Packaging

Packaging manufacturers incorporate this EVA grade as a primary base resin to impart desired thermoplasticity, quick setting, and cohesion required in high-throughput assembly lines for cartons and cases. Adjusting the loading of EA28025 supports viscosity control and adhesion on diverse paper and film substrates.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives, indirect food contact)
• REACH Annex XVII (SVHC monitoring)
• ISO 9001:2015 (Quality management in adhesive compounds)
• EU Regulation (EC) No. 1935/2004 (Materials intended for food contact packaging)

Typical usage ratio

• 20-45 wt% in overall adhesive formulations. Adjust percentage based on required open time and bond strength to corrugated board, lamination film, or folded carton. Higher VA content in EVA provides improved wettability for coated surfaces.

Downstream process integration

• Added during hot-melt compounding, co-extruded with tackifiers and waxes; pelletized before granulation for application via slot or spray applicators at 150–180°C; direct dosing possible in continuous production lines.

Final product types

• Hot melt adhesives for case & carton sealing, paper bag seams, and flexible packaging lamination used in FMCG and logistics sectors.

2. Photovoltaic (PV) Module Encapsulation

EVA copolymers with tightly controlled VA content play a critical role in solar cell encapsulation sheets, offering electrical insulation, UV resistance, and optical transparency. Cell manufacturers rely on stable thermal behavior and crosslinking performance in their lamination lines to achieve long-life, high-efficiency panels.

Industry compliance standards

• IEC 61215 (Crystalline silicon terrestrial PV modules—Design qualification and type approval)
• UL 1703 (Standard for Flat-Plate Photovoltaic Modules and Panels)
• RoHS (Restriction of Hazardous Substances Directive)
• ISO 14001 (Environmental management for PV manufacturing)

Typical usage ratio

• Formulations contain 32-34 wt% VA EVA as the primary encapsulant film layer. Adjusted for light transmission and crosslinking properties; additives seldom exceed 5 wt% for UV stabilization or secondary functionalization.

Downstream process integration

• Processed via extrusion compounding followed by calendering into films; supplied as rolls for vacuum lamination; crosslinks during thermal lamination with modules at 140–155°C under specified pressure and time cycles.

Final product types

• Packed, cut-to-size EVA encapsulation sheets for mono- and polycrystalline silicon solar panels in commercial and residential PV systems.

3. Cable Sheath and Insulation Compounds

Wire and cable producers use vinyl acetate EVA grades for compounding flexible, flame-retardant jacketing and insulation. Material performance supports insulation integrity, elongation, and electrical properties demanded in instrument, control, and communication cable construction.

Industry compliance standards

• UL 1581 (Reference Standard for Electrical Wires, Cables, and Flexible Cords)
• IEC 60228 (Conductors of insulated cables)
• RoHS and REACH SVHC (Hazardous substance restriction)
• EN 50363 (Insulating, sheathing and covering materials for low voltage energy cables)

Typical usage ratio

• 30–40 wt% of insulation/jacket formulations. Adjusted for required softness, tensile strength and flame resistance, typically paired with fillers (ATH, Mg(OH)₂) and plasticizers.

Downstream process integration

• EVA resin melted and mixed with FR agents, pigments, and stabilizers in internal mixers or twin screw extruders; direct extrusion over copper/aluminum wire during continuous cable production; cooling and in-line monitoring for dimensional accuracy.

Final product types

• Low-voltage electrical cable coatings, flexible sheathing for appliance wiring, communication cable insulation in industrial and construction settings.

4. Injection-Molded Foam for Footwear Midsoles

Footwear component manufacturers integrate this EVA to create lightweight, cushioning midsoles and insoles. Consistent VA ratio allows control of rebound properties and foam density, meeting both ergonomic and durability benchmarks required by leading sports brands.

Industry compliance standards

• ISO 20344 (Personal protective equipment—Test methods for footwear)
• ISO 9001 (Footwear component manufacturing—Quality systems)
• GB/T 15107 (China national standard for EVA foam for footwear)
• REACH Annex XVII (Candidate List of Substances of Very High Concern monitoring)

Typical usage ratio

• 60–98 wt% EVA in foam formulation, with precise reduction or increase based on target hardness, cell structure, and rebound. Added blowing agents and crosslinkers typically make up <5%.

Downstream process integration

• Dry blending with foaming agents and additives, direct charging to injection molding or compression molding line; heat-activated expansion and crosslinking at 140–160°C under pressure, followed by shaping and finishing.

Final product types

• Foamed midsoles, insoles, and outsole inserts for sport, fashion, and occupational footwear, including running shoes, sandals, and children’s clogs.

5. Compounded Films for Agricultural Greenhouse Covers

Producers of greenhouse films demand flexible, durable film compositions with high light transmission and thermal retention. This EVA enables formulation of clear covers that withstand repeated UV exposure and mechanical flex without brittleness, supporting reliable crop production across climates.

Industry compliance standards

• EN 13206 (Plastics—Plastic covering for agricultural purposes)
• ISO 4892-2 (UV weathering for plastics—film evaluation)
• China NY/T 1111 (National Agricultural Film Standard)
• RoHS (For restricted agricultural plastics in regulated regions)

Typical usage ratio

• 10–18 wt% EVA copolymer blended into PE-based film. Adjust higher for increased flexibility in cold climates or for thicker, multi-season covers.

Downstream process integration

• Dry blended with LDPE, anti-fog and UV-stabilizer masterbatches; introduction into film-blowing extruders; blown into sleeves or flat films and cooled for wind-up. Final slitting, folding, or perforation before packing.

Final product types

• Single- and multi-season greenhouse covers, tunnel and row-crop films for commercial vegetable, strawberry, and floriculture operations.

6. Flexible Hose and Tubing Compounds

Manufacturers of flexible industrial hoses and tubing select this EVA to deliver high impact strength and low-temperature flexibility, essential for handling fluid, pneumatic, or granular transport in harsh environments. Compounding with other polyolefins tailors mechanical and surface properties for demanding usage.

Industry compliance standards

• ISO 3994 (Industrial flexible hoses—General requirements for plastics hoses and tubing)
• FDA 21 CFR 177.1350 (Polymers for food contact flexible tubing, where applicable)
• EN 61386 (Conduit systems for cable management)
• RoHS and REACH for regulated applications

Typical usage ratio

• 10–35 wt% EVA in hose or tubing blends, up-adjusted for greater elasticity in cold performance environments or when higher impact absorption is required; PE or PP base, with or without reinforcing layers.

Downstream process integration

• Pelletized compounding with colorants, lubricants, or reinforcing fillers; melt-blending and direct extrusion through multi-layer dies or mandrels; in-line air cooling, coiling, and surface finishing for dimensional control.

Final product types

• Flexible hoses for fluid delivery, pneumatic transfer tubing, suction/discharge pipes for food processing, chemical supply, or agricultural irrigation systems.