Applications of LOTTE Chemical SEETEC VS440 EVA in Industrial Manufacturing

LOTTE Chemical SEETEC VS440 EVA, a low to medium VA (vinyl acetate) content ethylene-vinyl acetate copolymer, supports high-value downstream processes across specialized industrial sectors. Our material ensures consistent product performance and reliable processability, strengthening partners’ end-use applications through strict quality assurance and traceability.

1. Photovoltaic Encapsulant Film Production

Photovoltaic module manufacturers select this EVA grade for solar encapsulant film extrusion due to its clean melt behavior, reliable crosslinking profile, and excellent optical clarity. Throughout the film lamination and module assembly process, our copolymer delivers critical impact absorption, adhesive sealing, and UV stabilization to safeguard silicon cells and maximize power conversion over the product lifecycle.

Industry compliance standards

• IEC 61215: Terrestrial photovoltaic module performance (for film materials)
• UL 1703 / UL 61730: Standards for PV module safety
• RoHS Directive (EU): Restriction of Hazardous Substances
• ISO 9001: Certified quality management for component suppliers

Typical usage ratio

• Encapsulant films contain 96–99% EVA copolymer by weight, with the remainder comprising UV absorbers, crosslinking agents, and process stabilizers. The precise proportion adjusts according to required crosslinking density and transparency for various solar cell technologies.

Downstream process integration

• Compounding before film extrusion, followed by pelletizing and sheet casting; subsequent lamination onto photovoltaic cells during module assembly using vacuum lamination at 140–155°C for crosslinking.

Final product types

• Solar module encapsulant sheets for monocrystalline, polycrystalline, and thin-film PV panels
• Backsheet adhesives and specialty interlayer films in bifacial modules

2. Hot Melt Adhesives for Packaging

Downstream adhesive compounders and packaging converters specify this EVA as a core resin in hot melt formulations for carton sealing, bookbinding, and label stock. Its controlled melt flow, compatibility with tackifiers, and balanced flexibility allow for temperature-resistant adhesive blocks and granules that maintain bond strength on paper, cardboard, and OPP films, enabling high-speed applications on automated packaging lines.

Industry compliance standards

• FDA CFR 21 §175.105: Adhesives for indirect food contact
• EN 12368: Requirements for adhesives used in conforming food packaging
• ISO 9001: Adhesive material manufacturing standards
• REACH (EU): SVHC compliance for chemical content

Typical usage ratio

• 40–65% EVA copolymer in hot melt adhesives, adjusted based on required flexibility, open time, and viscosity; remaining percentage consists of resins, waxes, and plasticizers to tune performance for substrate and line speed.

Downstream process integration

• Blending in heated mixing vessels, compounding with aliphatic/aromatic tackifiers, and extrusion or molding into granules or blocks; subsequent application via molten dispensing units on automated packaging machinery.

Final product types

• Pressure-sensitive and case sealing adhesives
• Bookbinding adhesive pellets and blocks
• Label adhesives for consumer and industrial goods

3. Footwear Foam and Injection Molding

Footwear manufacturers incorporate this EVA resin in foam compounding and injection molding to provide light weight, shock absorption, and durability in midsoles, insoles, and molded shoe parts. Its uniform cell structure and resilience under compression deliver long-lasting cushioning in both sports and leisure applications, while enabling consistent processing on modern foam injection lines and direct soling units.

Industry compliance standards

• ISO 20344: Standard for footwear testing and safety
• REACH (EU): Absence of restricted substances
• GB/T 15107: Chinese national standard for sport shoe materials
• ISO 9001: Quality consistency across bulk shipments

Typical usage ratio

• 60–85% EVA copolymer in foam formulations by weight, with varying loading depending on desired cushioning and density; remainder includes blowing agents, crosslinkers, colorants, and processing aids suited for batch or continuous expansion systems.

Downstream process integration

• Premixing EVA pellets with foaming and curing agents, melt compounding and granulation, then injection into molds for expandable foam midsoles or direct-injected shoe soles, often with on-line crosslinking under heat and pressure.

Final product types

• Performance sport shoe midsoles and insoles
• Molded slippers and sandals
• Children's EVA foam shoes and boots

4. Wire and Cable Insulation

Cable manufacturers use this EVA grade as a primary component for low-voltage insulation and sheathing, leveraging its electrical resistance, flame retardancy, and flexibility. It enables consistent extrusion flow and dispersion quality, which is vital for producing thin-walled, durable jacketing and insulation on copper and aluminum wire for construction, automotive, and appliance markets.

Industry compliance standards

• IEC 60227: Polyvinyl chloride insulated cables (primary for low voltage insulation compounds)
• UL 62 / UL 758: Appliance wiring material and wire standards
• RoHS Directive: Hazardous substance restrictions in electrical cables
• ISO 14001: Environmental management for compounders

Typical usage ratio

• 50–88% EVA copolymer by weight in insulation compounds, dependency on dielectric requirements and mechanical flexibility; rest of formulation includes fire retardants, fillers, antioxidants, and processing aids.

Downstream process integration

• Pellet blending and melt compounding followed by direct extrusion over conductor wires, with possible in-line crosslinking or surface embossing for texturized outer jackets, supporting continuous and batch cable production lines.

Final product types

• Building wire insulation (e.g., H07V-K, THHN)
• Flexible extension and appliance cords
• Automotive low-voltage cable sheathing

5. Film Blowing for Greenhouse and Agricultural Films

Agricultural film producers choose this copolymer as a blend component to manufacture greenhouse covers and row-mulch films that require good toughness, tear resistance, and low-temperature flexibility. The formulation helps extend field-film lifespans, reduce puncture rates, and stabilize mechanical and optical properties in demanding seasonal climates. Integration into mono and multilayer co-extruded films delivers reliable crop protection performance.

Industry compliance standards

• EN 13206: Standards for agricultural plastic films (thermal and UV properties)
• ISO 9001: Documented process control for film extrusion
• REACH (EU): No SVHCs or unapproved additives
• National environmental and recycling regulations for agricultural plastics

Typical usage ratio

• 5–25% EVA content in film blends, adjusted based on transparency, toughness, and elasticity targets; higher levels used for frost protection and mechanical reinforcement in multilayer constructions.

Downstream process integration

• Blown film extrusion, where EVA is blended with LDPE or LLDPE in extruder hoppers followed by inflation, bubble cooling, and winding; may include offline corona or anti-block treatment to ensure roll stability.

Final product types

• Greenhouse covering films
• Mulching sheets and silage wrap
• Thermal anti-drip and fog control agricultural films