Applications of Hanwha TotalEnergies 2518C0 EVA in Industrial Manufacturing

Hanwha TotalEnergies 2518C0 EVA (ethylene-vinyl acetate copolymer) supports diverse industrial manufacturing sectors requiring reliable polymeric materials with controlled flexibility, adhesion, and durability. Below, we detail major downstream application sectors, with specific compliance, formulation guidance, and end product pathways based on industrial practice.

1. Photovoltaic Encapsulant Film Production

This EVA grade plays a central role in the manufacturing of encapsulation films for solar panels. Its consistent vinyl acetate content and melt flow properties ensure stable crosslinking and optical clarity critical for photovoltaic modules. Manufacturers utilize this material to optimize lamination, weather resistance, and electrical insulation in solar laminates, driven by regulatory demands and performance benchmarks for both mono- and polycrystalline modules.

Industry compliance standards

• IEC 61215: Terrestrial photovoltaic module design qualification and type approval
• UL 1703: Standard for Flat-Plate Photovoltaic Modules and Panels
• ISO 9001: Quality management systems
• RoHS Directive (2011/65/EU): Restriction of Hazardous Substances

Typical usage ratio

• Film formulations use 100% EVA as the main encapsulant resin base, with additive loadings adjusted for UV absorption, crosslinking agents (0.3–0.8 phr), and anti-aging stabilizers. The vinyl acetate content determines lamination temperature and crosslinking schedule.

Downstream process integration

• Material feeds into flat extrusion lines to form encapsulant sheets (0.3–0.6 mm). Processors add crosslinking agents during compounding; calendaring and flat-die extrusion deliver continuous film, which is cut and laminated between glass and photovoltaic cells during panel assembly.

Final product types

• Encapsulant films for crystalline silicon PV modules
• Backsheet-interlayer films for solar panels
• Thin-film solar module encapsulation sheets
• Customized EVA layers for bifacial photovoltaic products

2. Hot Melt Adhesives (HMA) for Packaging and Product Assembly

EVA copolymers with controlled melt index serve as the primary binder in industrial hot melt adhesive production, widely adopted in bookbinding, paper carton sealing, wood product lamination, and hygiene product assembly. The tailored flexibility, bonding performance, and thermal behavior meet precise manufacturing demands for high-speed packaging and conversion operations requiring rapid setting and durable bonds, subject to stringent consumer and safety standards in regulated markets.

Industry compliance standards

• FDA 21 CFR 175.105: Adhesives for direct food contact
• EN 923: Adhesives – Terms and definitions
• EU Regulation (EC) No 1935/2004: Materials intended for food contact
• ISO 9001: Quality management systems

Typical usage ratio

• EVA content typically ranges from 30% to 50% by weight in hot melt adhesive formulations, adjusted against tackifier resins, waxes, and plasticizers to achieve the balance of flexibility and open time required for specific packaging lines.

Downstream process integration

• The raw material enters internal mixers or twin-screw extruders with tackifiers and waxes. Compounded adhesive is pelletized or extruded as hot melt sticks, blocks, or pellets. Automated dispensing systems apply the adhesive in end-user packaging or assembly lines.

Final product types

• Hot melt adhesives for case and carton sealing
• Perfect binding adhesives for book production
• Product assembly adhesives for disposable hygiene
• Hot melt glues for woodworking, crafts, and laminates

3. Wire & Cable Insulation Compound Production

Wire and cable manufacturers utilize this EVA grade to produce thermoplastic insulation and jacketing compounds with controlled dielectric performance and flexibility. The combination of thermal stability and mechanical properties under extrusion conditions supports compliance with electrical safety regulations. Compounded EVA serves in low-voltage insulation, data cable sheathing, and flexible cord covering.

Industry compliance standards

• UL 1581: Reference standard for electrical wires, cables, and flexible cords
• IEC 60227: Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V
• RoHS Directive (2011/65/EU): Restriction of Hazardous Substances
• ISO 14001: Environmental management systems

Typical usage ratio

• EVA typically comprises 35% to 70% of the compound, depending on flexibility and flame-retardance requirements. Loadings adjust with plasticizers, fillers (e.g., ATH), and stabilizers to pass flammability and cold bend tests.

Downstream process integration

• Compounders blend EVA, filler, and additives in high-shear mixers; process feeds extrusion lines for wire coating. Continuous crosshead extrusion applies the compound over conductor; cooling, sizing, and surface finishing complete the cable production workflow.

Final product types

• Low-voltage electrical insulation for appliance wires
• Cable jackets for flexible cords and datacom cables
• Sheathing for instrumentation and signal cables
• Halogen-free flame-retardant insulation compounds

4. Foam Shoe Sole and Sports Padding Fabrication

The footwear and sporting goods industries employ this EVA to produce lightweight, compression-set-resistant foam materials for midsoles, insoles, and impact padding. Control over expansion ratio, closed-cell structure, and resilient cushioning relies on compounding and foaming process accuracy, particularly for high-performance and safety-rated footwear lines.

Industry compliance standards

• EN ISO 20344: Test methods for footwear components
• REACH Regulation (EC) No 1907/2006: Chemical safety compliance
• ISO 9001: Quality management systems
• California Proposition 65: Safe consumer product composition

Typical usage ratio

• EVA content in foamed formulations ranges from 55% to 85% by weight, influenced by the density, hardness, and elasticity targets of finished soles and padding. Blowing agent concentrations modulate the final expansion and cell structure.

Downstream process integration

• Manufacturers dry blend EVA with foaming agents, crosslinkers, and colorants before feeding the mixture into batch- or continuous-foam molders. Controlled heating and expansion yield foam blocks or sheets, which undergo secondary cutting, stamping, or lamination for assembly in production.

Final product types

• Shoe midsoles and insoles for athletic and leisure footwear
• Protective padding for helmets and gear
• Compression-molded sports floor and mat products
• Custom orthopedic footwear inserts

5. Flexible Film and Sheet Extrusion for Packaging

Packaging converters integrate this raw material into coextruded and monolayer film structures requiring transparency, sealability, and puncture resistance. Its use in food and industrial packaging films ensures compliance with hygiene and migration standards, while adjustable process parameters govern clarity, gauge uniformity, and mechanical properties vital to automated packaging lines.

Industry compliance standards

• FDA 21 CFR 177.1350: EVA polymers for food contact articles
• EU Regulation (EC) No 10/2011: Plastics for food contact
• BRCGS Packaging Materials Standard
• ISO 22000: Food safety management systems

Typical usage ratio

• EVA loading in film blends ranges from 10% to 40% by weight in multilayer film extrusion, depending on required flexibility, sealing strength, and optical properties. Ratios are tuned for laminate structures or single-layer wrap applications.

Downstream process integration

• Pellets are dry blended with polyethylene or other polymers, then processed via blown film or cast film extrusion. Coextrusion lines layer EVA-containing film with barrier or strength materials. Finished film is converted to bags, liners, or wrap in downstream operations.

Final product types

• Flexible food packaging films for fresh produce and bakery
• Industrial bagging films and liners
• Seal layers in multi-material pouches and laminates
• Protective wrapping films for electronics and components

6. Sealant Compound Manufacturing for Construction

This EVA grade underpins formulations for high-performance sealants used in glazing, construction joints, and panel assembly within building envelopes. The polymer’s balance of flexibility, processability, and low-temperature performance ensures compliance with structural stress, movement, and weathering tests imposed by building product standards.

Industry compliance standards

• ASTM C920: Standard for elastomeric joint sealants
• EN 15651-1: Sealants for non-structural glazing
• LEED v4: Low-emitting material criteria
• ISO 11600: Building construction joint sealants

Typical usage ratio

• EVA polymer base content in sealant formulations generally ranges from 25% to 45% by weight, adjusted against fillers, plasticizers, and pigmentation to deliver required modulus, flow, and adhesion to concrete, metal, or glass substrates.

Downstream process integration

• Compounders mix EVA and additives in planetary mixers; resultant compound is extruded or filled into cartridges or soft packs for direct use. Cartridges or sausage packs suit both automated and manual construction site application.

Final product types

• Construction joint sealants for expansion and movement joints
• Glazing sealants for aluminum, vinyl, and glass facades
• Panel adhesives and sealing strips used in prefabricated buildings
• Weather-resistant fillers for window and door assemblies