Applications of Hanwha TotalEnergies E181L EVA in Industrial Manufacturing

Hanwha TotalEnergies E181L EVA is a widely specified ethylene-vinyl acetate copolymer, known for its low vinyl acetate content and high clarity. As the direct manufacturer, we support diverse industrial fields with rigorous quality assurance, supplying this grade primarily to downstream sectors where its unique combination of processability, mechanical strength, and transparency is essential for certified, value-added end uses.

1. Photovoltaic Encapsulant Film Production

Photovoltaic module manufacturers rely on E181L for encapsulation film, utilizing its high transparency and precise melt flow in lamination lines. Our customers incorporate this resin into glass/backsheet and glass/glass module designs, where clarity, moisture resistance, and adhesion to various substrates directly contribute to module durability and energy conversion reliability. Production teams adjust pre-crosslinking and curing conditions based on ambient and module design variables, ensuring secure encapsulation without compromising electrical insulation.

Industry compliance standards

• IEC 61215 (Crystalline silicon terrestrial PV modules)
• UL 1703 (Standard for Safety: Flat-Plate PV Modules and Panels)
• TÜV Rheinland 2 PfG 1162/08.2007 (Encapsulation requirements)
• RoHS Directive (2011/65/EU)

Typical usage ratio

• 55–80% of total encapsulant film weight, modified by copolymer crosslinker level and curing schedule targeting module size and application climate zone

Downstream process integration

• Resin pellet dosing in twin-screw extrusion
• In-line compounding with UV and antioxidant packages
• Calendering or casting into films (thickness 300–600 μm)
• Thermal lamination onto PV cells during module assembly

Final product types

• PERC and PERT solar panels
• Thin-film cadmium telluride modules
• Bifacial PV modules
• Building-integrated photovoltaics (BIPV) laminates

2. Hot Melt Adhesive Formulation

Industrial adhesive producers include this EVA grade in hot melt formulations to balance open time, flexibility, and bonding strength for wood, carton packaging, and bookbinding lines. It delivers flowability required for high-speed automated dispensing while maintaining adhesion under variable humidity and temperature ranges. Formulators fine-tune the EVA concentration in concert with tackifiers and wax conditioners to match the substrate porosity and required set speed.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for indirect food contact)
• REACH Regulation (EC) No 1907/2006
• ASTM D3498 (Adhesives for field-gluing wood structural panels)
• ISO 9001:2015 (Quality management systems for adhesive producers)

Typical usage ratio

• 20–50% of total hot melt formulation, determined by melt viscosity target, final softness, and strength requirements specific to the packaging or woodworking application

Downstream process integration

• Direct pellet melting in jacketed mixers with process temperature control (140–180°C)
• Staged blending with resin modifiers, plasticizers, or tackifiers
• Extrusion into sticks, chips, or pelletized adhesives for end-user processing
• Bulk drum or block molding for large-scale industrial units

Final product types

• Hot melt glue sticks for packaging lines
• Bookbinding adhesives
• Woodworking and furniture assembly glues
• Carton and case sealing adhesives

3. Wire & Cable Insulation and Sheathing

Specialty cable producers prefer E181L for its low gel count and electrical insulating properties in mid-voltage cable jacketing and insulation layers. The compound offers consistent processability during continuous extrusion and resists stress cracking, ideal for flexible cords and halogen-free cable constructions. Color dispersion, flame retardant loading, and jacket thickness can be tailored to pass stringent regulatory tests for safety and service life.

Industry compliance standards

• UL 62 (Flexible cords and cables)
• IEC 60227 (Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V)
• EN 50363-1 (Thermoplastic elastomer insulation and sheathing compounds)
• Restriction of Halogens protocols where required

Typical usage ratio

• 25–40% of insulation or sheathing compound for mid-voltage, or up to 60% in certain low-voltage flame-resistant blends, adjusted for flame retardant and filler loading level

Downstream process integration

• Dry blend compounding with flame retardant, plasticizer, and color masterbatch
• Co-extrusion onto copper or aluminum conductors at 150–200°C on tandem or single-screw extruders
• In-line quality control for dielectric strength and gel content
• Final cable sheathing and surface tension control

Final product types

• Flexible power cords
• Halogen-free instrument cables
• Medium voltage insulation layers
• Data and telecommunication cable jackets

4. Flexible Foam Production for Footwear and Sports Equipment

Manufacturers in the footwear and sporting goods sector introduce this EVA grade into foam compounding lines for midsoles, insoles, and protective padding. E181L's balance between density control and cell structure uniformity allows for flexible, lightweight foams with high resilience, cushioning, and color uniformity. The dosing into the foam mix is adjusted relative to crosslinker addition and final article compression set targets, ensuring dimensionally stable cushioning after repeated impact cycles.

Industry compliance standards

• EN ISO 20344 (Personal protective equipment – Test methods for footwear)
• ASTM F1614 (Standard test method for shock absorbing properties of materials)
• REACH Annex XVII (Restriction on chemicals for consumer applications)
• ISO 9001:2015 for in-house QC of compounding and molding

Typical usage ratio

• 60–95% of foam formulation, depending on hardness rating, expansion ratio, and foam cell structure requirements specific to end use (e.g., athletic midsoles vs. yoga mats)

Downstream process integration

• Mixer-loaded alongside blowing agent, pigment, and crosslinking agent (such as DCP)
• Batch molding by compression or injection at 140–170°C
• Post-curing and cutting to final article dimensions
• Integration with surface lamination or direct attachment to outsole in shoe assembly

Final product types

• Athletic shoe midsoles and insoles
• Flip-flop soles and casual footwear
• Protective sports padding
• Foamed mats for fitness and therapy

5. Film Blowing for Packaging Applications

Flexible packaging converters run E181L in multilayer film blowing lines, valuing its impact resistance, strength, and optical clarity for specialty bags and overwraps. Customized feed rates and blend ratios ensure gauge consistency and sealability, accommodating various packaging substrates from food to industrial liners. Process engineers optimize screw temperatures and drawdown speed to achieve targeted haze and puncture resistance without compromising heat seal strength needed for high-speed filling lines.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymers in food packaging)
• EU Regulation No. 10/2011 (Plastic materials intended to contact food)
• GB 9685-2016 (Chinese standard for additives in food-contact materials)
• ISO 22000 (Food safety management where packaging is used for food sector)

Typical usage ratio

• 5–20% as a modifier in LDPE or LLDPE for film blends, increased to 100% for mono-layer shrink or stretch films requiring high flexibility and clarity

Downstream process integration

• Pneumatic pellet conveying to blown film extruder feed hoppers
• Single or multi-layer co-extrusion (die diameter 200–600 mm typical)
• Post-extrusion corona treatment for print adhesion
• Film slitting and conversion operations

Final product types

• Food-grade packaging films
• Industrial overwrap shrink films
• Medical device packaging
• Sealant and barrier films for pouch lamination