Applications of LG Chem SEETEC EL18018 EVA in Industrial Manufacturing

LG Chem SEETEC EL18018 EVA functions as a key polymeric raw material in advanced industrial production lines. The following sections detail specific downstream sectors and the real-world usage, compliance parameters, formulation ratios, process integration points, and end products associated with its application.

1. Photovoltaic Encapsulation Films (Solar Module Sheets)

This grade of EVA acts as the primary base resin for encapsulant sheet production in photovoltaic (PV) module manufacturing. Its controlled melt index and vinyl acetate content balance transparency, crosslinking speed, and mechanical resilience, enabling stable lamination on solar cell arrays. Manufacturers rely on this raw material to achieve required delamination resistance, moisture ingress prevention, and electrical insulation performance in field-deployed solar panels.

Industry compliance standards

• IEC 61215: Terrestrial photovoltaic modules – Design qualification and type approval
• UL 1703: Standard for Flat-Plate Photovoltaic Modules and Panels (North America)
• RoHS Directive 2011/65/EU and subsequent amendments
• REACH Regulation (EC No. 1907/2006)

Typical usage ratio

• 95–100% EVA in the encapsulant sheet compound; remaining 0–5% consists of crosslinking agents and UV/thermal stabilizers. Adjustments made according to solar cell type and target crosslinking density.

Downstream process integration

• Direct extrusion into sheets followed by roll calendaring; compounded pellets fed into encapsulant film lines
• Thermal lamination during module assembly, where heat and pressure partially crosslink the film within multilayer panel stacks
• Integration after stringing and before glass front/backsheet application

Final product types

• Photovoltaic encapsulant sheets
• Monocrystalline and polycrystalline solar panel modules
• Bifacial and half-cell PV modules
• Floating solar panels

2. Hot Melt Adhesives for Packaging and Bookbinding

This EVA grade serves as a principal polymer matrix in manufacturing industrial hot melt adhesive systems, widely used in automatic case and carton sealing, paperboard packaging, and perfect binding for print media. Compounders value its specific viscosity range for consistent glue-line thickness and set time control. It supports stable dispersions of tackifiers, resins, and plasticizers without loss of adhesive strength, impacting both application machinery performance and bonded goods integrity.

Industry compliance standards

• FDA 21 CFR 175.105: Adhesives (for indirect food contact packaging)
• EN 923: Adhesives – Terms and definitions
• ISO 9001: Quality management systems (adhesive plant certification)
• GMP for adhesives in food and pharmaceutical secondary packaging

Typical usage ratio

• 25–45% EVA by weight in hot melt adhesive formulations; remaining proportion includes tackifiers, waxes, and additives. Ratio customized for flexibility, open time, and substrate wettability.

Downstream process integration

• Feeding as granular raw material in hot melt adhesive compounding extruders
• Blending and melting with tackifiers and waxes in reactors prior to pelletizing or block formation
• End-user application via heated glue tanks in automated mounting or binding machinery

Final product types

• Carton and case adhesives
• Perfect binding adhesives for books and brochures
• Labels and tape adhesives
• Pallet stabilization adhesives

3. Wire and Cable Insulation Compounds

EL18018 EVA is used extensively as a polymer base for low voltage wire and cable insulation, providing flexibility at low temperatures, resistance to degradation from sunlight, and good dielectric properties. Cable compounders exploit its precise melt flow and consistent additive compatibility for extruding homogeneous, void-free insulation layers around copper or aluminum conductors, supporting stable electrical transmission in indoor and outdoor environments.

Industry compliance standards

• IEC 60228: Conductors of insulated cables
• UL 1581: Reference standard for electrical wires, cables, and flexible cords
• RoHS Directive for restricted hazardous substances
• CSA C22.2 No. 49: Flexible cords and cables

Typical usage ratio

• 55–80% EVA in primary insulation compounds; remainder: inorganic fillers, antioxidants, flame retardants. Loading tailored for flame rating, tensile properties, and flexibility.

Downstream process integration

• Direct mixing with flame retardants and fillers in Banbury or twin-screw mixers
• Feeding the resulting compound into cable extrusion lines, where melt-coated onto wires under controlled temperature and pressure
• Real-time in-line QA checks for concentricity and insulation thickness

Final product types

• Flexible power cables
• Building wire insulation
• Automotive low-tension cable insulation
• Solar PV wire insulation

4. Injection Molded Foam Shoes and Sporting Goods

Downstream footwear manufacturers use this EVA material in foaming compounds to produce midsoles and soles for sports shoes, sandals, clogs, and yoga equipment. The specific melt index and vinyl acetate content control cell structure, bounce, and softness after injection molding and expansion. Modified recipes allow for lightweight, resilient, and color-stable finished articles with tailored hardness, crucial for end-user comfort and durability.

Industry compliance standards

• REACH Regulation (Annex XVII restrictions for articles)
• ISO 20345: Safety footwear (industrial supply chain)
• GB 30585—2014: Safety technical specification for children’s shoes (China market)
• EN 13634: Protective footwear for motorcyclists

Typical usage ratio

• 70–95% EVA in compound, with 3–20% foaming agents, color masterbatch, and crosslinkers. Ratio adjusted for target density, tear resistance, and rebound to suit different footwear models.

Downstream process integration

• Compounding in internal mixers, followed by pelletizing
• Pneumatic transfer of pellets to injection molding lines
• Foaming, expansion, and crosslinking occur in mold at elevated temperature and pressure
• Finishing steps: venting, trimming, surface texturing, quality inspection

Final product types

• Sneaker midsoles and outsoles
• Comfort sandals and slippers
• Anti-slip shower shoes
• Yoga mats, fitness blocks, and sports pads

5. Flexible Film for Food Packaging

EVA-based films derived from this material are used as sealing and adhesive layers in multilayer flexible packaging for food products. Formulators leverage its sealing integrity, puncture resistance, and compatibility with PE and PET films, ensuring strong yet low-temperature seals. This application supports high-speed packaging lines, modified atmosphere bagging, and preservation of food quality during transport and shelf display.

Industry compliance standards

• FDA 21 CFR 177.1350: Ethylene-vinyl acetate copolymers (food contact)
• EU 10/2011: Plastics Materials and Articles in Contact with Food
• GMP (EC No. 2023/2006) for food contact materials
• BfR Recommendations XV (German Food Safety Authority)

Typical usage ratio

• 15–35% EVA blended with LDPE, LLDPE, or tie resin in the relevant film layer. Adjusted for sealing temperature, film thickness, and compatibility requirements for specific products.

Downstream process integration

• Blending with co-polyolefins in film extrusion lines
• Co-extrusion onto substrates for multilayer construction
• Thermal lamination and printing as required by packaging format
• Performance QA: seal strength, migration, and mechanical testing

Final product types

• Pillow pouch packaging
• Bag-in-box liners
• Blister and lidding films
• Fresh produce and bakery bags

6. Modifier for Bitumen in Road and Roofing Applications

This EVA resin acts as a performance enhancer for bitumen modification, improving cold flexibility and elastic recovery in asphalt blends for paving and waterproofing membranes. Asphalt compounders appreciate its melt processability and gel-free integration with bitumen matrices, allowing for smooth processing, improved long-term performance under load, and reduced susceptibility to weather-induced degradation.

Industry compliance standards

• EN 14023: Bitumen and bituminous binders – Polymer modified bitumen
• ASTM D5976: Standard specification for EVA-modified bitumen in roofing
• AASHTO M320: Performance-graded asphalt binder specification (for road use)
• ISO 9001 for binder and mix plant operations

Typical usage ratio

• 2–8% EVA added to hot bitumen blends depending on application (road paving vs. membrane). Higher ratios deliver improved elasticity and cold crack resistance for specialty applications.

Downstream process integration

• Direct feed into high shear bitumen mixing kettles at elevated temperatures
• Thorough dispersal prior to granulating, drum filling, or roll-forming of membranes
• Performance validation for penetration, softening point, and elastic recovery

Final product types

• Modified bitumen waterproofing membranes
• Polymer modified road asphalt
• Bridge deck paving materials
• Roof underlayment membranes