Applications of LG Chem SEETEC EP28025 EVA in Industrial Manufacturing

LG Chem SEETEC EP28025 EVA finds consistent demand in several critical industrial manufacturing sectors due to its controlled vinyl acetate content, stable melt index, and proven compatibility within established processes. Our in-plant integration experience confirms its value in demanding downstream applications, all subject to strict industry-specific compliance, technical composition targets, and process controls.

1. Encapsulation Layer for Photovoltaic Modules

Leading solar panel OEMs specify this grade of EVA as the encapsulation material for crystalline silicon and thin-film solar modules. The polymer provides weather resistance, strong adhesion to glass and cells, and sustained optical transparency through the lamination process. Encapsulation protects cells from moisture and mechanical impact during outdoor application, while its thermal properties support high-speed lamination cycles and field durability over 25+ years.

Industry compliance standards

• IEC 61215 (crystalline silicon PV module test)
• UL 1703 / UL 61730 (standards for safety of PV modules)
• RoHS Directive 2011/65/EU
• REACH Regulation (EC) No 1907/2006

Typical usage ratio

• Module encapsulation film thickness usually 400–600 μm per side
• EVA layer composes 9–12% of total module weight depending on module size, glass thickness, and cell count
• Adjust film thickness based on cell size; material flow optimized for lamination cycle

Downstream process integration

• Extrusion casting or calendaring to film, followed by post-extrusion crosslinking with peroxide or silane
• Lamination with glass and cells under controlled vacuum/temperature (140–155°C, 6–12 min cycle)
• Integration in module line cleanroom with in-line QA for air pockets and crosslinking degree
• Final modules undergo mechanical stress and weather tests according to IEC protocols

Final product types

• Monocrystalline and polycrystalline photovoltaic panels
• Bifacial modules
• Building-integrated photovoltaics (BIPV)
• Flexible and lightweight solar modules

2. Hot-Melt Adhesive Formulation for Industrial Packaging

EVA copolymer serves as a primary polymer backbone in hot-melt adhesive (HMA) systems for carton sealing, bookbinding, and multiwall sack production. Its defined vinyl acetate content enables low application temperature and instant set time, maintaining bond strength in variable humidity and warehouse conditions. Downstream manufacturers blend EVA with compatible tackifiers and waxes to tune viscosity, open time, and surface wet-out as required by packaging substrates and machinery.

Industry compliance standards

• FDA 21 CFR 175.105 (adhesives - indirect food contact)
• EN 923/924 definitions and test methods for adhesives
• ISO 9001:2015 QC system in adhesive plants
• Compliance to customer-specific food packaging guidelines

Typical usage ratio

• EVA content in adhesive base 28–35% depending on target adhesion and flexibility
• Blended with 25–40% tackifying resin (e.g., aliphatic hydrocarbon or terpene resins)
• Waxes/plasticizers tuned 10–20% for viscosity and open time control
• Recipe adjusted for line speed, substrate absorbency, and climatic needs

Downstream process integration

• Pellet blending and melt-compounding in jacketed tank mixers at 120–150°C
• Continuous extrusion and pelletization for HMA block or sticks
• Direct feeding into applicator hoppers for automated packaging lines
• Routine quality control for viscosity, tack, and bond strength

Final product types

• Industrial hot-melt adhesives for corrugated box sealing
• Bookbinding thermoplastics
• Bag-sealing adhesives for animal feed, cement, or flour sacks
• Pressure-sensitive labels and tapes

3. Foam Sheet Production for Footwear and Sporting Goods

Footwear and sports equipment manufacturers employ this copolymer as the main resin for physically or chemically foamed EVA sheets. Controlled formulation delivers soft cushioning, rebound, and shape retention in midsoles, insoles, and helmet pads. The resin supports consistent cell structure and fusion, essential for meeting dimensional and mechanical demands in high-volume shoe and protective gear production.

Industry compliance standards

• GB/T 19855-2005 (EVA foam poultry for shoes - China)
• REACH SVHC compliance for restricted substances
• CPSIA (Consumer Product Safety Improvement Act) for children’s goods in North America
• ASTM D1564 (Flexible Cellular Materials)

Typical usage ratio

• Primary EVA content up to 65–72% of total formulation (balance is blowing agents, crosslinkers, fillers, colorants)
• Azodicarbonamide (ADC) or other blowing agents 1–2% for physical foaming
• Crosslinking agents 0.3–0.6% for shape memory and abrasion resistance
• Fillers/calcium carbonate added up to 20% when stiffness required

Downstream process integration

• Batch blending, extrusion and continuous sheet processing at 115–135°C
• In-line foaming ovens or press foaming with controlled pressure and temperature
• Die-cutting or molding into shoe components post-foaming
• On-line testing for hardness, density, shrinkage, and color homogeneity

Final product types

• Cushion foams for athletic and casual footwear
• Protective pads in helmets and sports gear
• Yoga mats, gym flooring sheets
• Recreational floatation blocks

4. Cable and Wire Insulation Compounds

Major wire and cable OEMs incorporate this material in low-voltage insulation compounds and jacketing for flexible cords, appliance cables, and communication wires. The polymer’s melt processability allows for stable extrusion at industry-standard line speeds, while its compatibility with flame retardants and stabilizers supports compliance with electrical safety and fire resistance codes.

Industry compliance standards

• UL 62 / UL 1581 (Flexible cords and appliance wiring)
• IEC 60502-1 (Power cables – extruded insulation and sheaths)
• RoHS 2011/65/EU for restricted heavy metals and phthalates
• Certification to ISO 14001 for environmental management

Typical usage ratio

• EVA content in insulation compounds 28–45% depending on required hardness and flexibility
• Flame retardants (e.g., ATH) up to 35% for fire-safe cables
• Antioxidants, UV stabilizers <2% for weathering and aging resistance
• Adjust ratios based on final application: appliance cord, telecom wire, or power cable

Downstream process integration

• Compounding with fillers and additives in twin-screw extruders
• Direct extrusion over copper or aluminum conductors using pressure or tubing techniques
• Online measurement for concentricity and insulation thickness
• Post-extrusion curing or crosslinking where required

Final product types

• Flexible electrical cords for appliances
• Low-voltage power cables (up to 1 kV)
• Coaxial and LAN cable jackets
• Multicore instrument cable insulation

5. Flexible Film and Sheet for Food Contact Packaging

Converters rely on this grade of copolymer to produce flexible blown and cast films for food-grade applications, where clarity, toughness, and strong heat seal properties are critical. The formulation ensures regulatory compliance and process reliability, particularly in the production of multilayer film for bag-in-box, vacuum pouches, and barrier film structures.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymer contact with food)
• EU No 10/2011 (Plastics materials and articles in contact with food)
• GMP Regulation (EC) 2023/2006
• ISO 22000 food safety management

Typical usage ratio

• Layer usage 5–30% in multilayer structures, depending on sealant layer role
• Blended with LDPE, LLDPE, or tie layers for barrier property tuning
• Thickness 20–150 μm according to package type and regulatory migration limits
• Processing optimized to minimize extractables and odor migration

Downstream process integration

• In-line extrusion blending for co-extruded multilayer films
• Blown or cast film lines using controlled temperature regimes (165–200°C die head)
• QA for film tensile strength, heat seal window, and organoleptic neutrality
• Compliance batch documentation for traceability and audit purposes

Final product types

• Bag-in-box wine and liquid packaging liners
• Fresh produce and dairy pouches
• Frozen food flexible bags
• Vacuum and MAP (modified atmosphere packaging) pouches

6. Masterbatch Carrier for Additive Dispersion

Compounding specialists select this copolymer as an efficient carrier resin in the manufacture of additive and color masterbatches, improving dispersion of pigments, flame retardants, and UV absorbers into polyolefins and engineering plastics. The appropriately balanced melt flow ensures easy mixing and stable let-down in downstream film blowing, molding, and extrusion lines.

Industry compliance standards

• ISO 9001:2015 certified QC management for masterbatch production
• Compliance to GB 9685 for food contact additives (modified for export markets)
• Customer-specific toy and medical packaging standards
• REACH SVHC monitoring on all carrier resins

Typical usage ratio

• EVA carrier base forms 45–70% of masterbatch pellet formulation
• Pigment or additive loading customized from 10–50% depending on target let-down ratio
• Process settings optimized for plasticization and pigment wetting without agglomeration
• Carrier resin ratio tuned to polymer compatibility and downstream product line

Downstream process integration

• Twin-screw extrusion and underwater pelletizing of masterbatch
• Direct addition to polymer melt on blown film, injection molding, or sheet lines
• Ensures uniform distribution and no carrier bleed in final product
• Lab testing for dispersion stability and absence of color streaks

Final product types

• Color masterbatches for films and sheets
• UV stabilizer and flame retardant concentrates
• Anti-block and anti-static additive pellets
• Food contact and medical packaging masterbatches