Applications of Hanwha TotalEnergies 2315 EVA in Industrial Manufacturing

Hanwha TotalEnergies 2315 EVA is a copolymer resin with moderate VA content and melt index, widely used by manufacturers in sectors requiring flexibility, compatibility with additives, and reliable processing behavior. Below, we present detailed application scenarios based on real industrial downstream uses, illustrating our commitment to transparent and practical partnership on demanding production lines.

1. Photovoltaic Encapsulation Films

Manufacturers in the solar energy sector utilize 2315-grade EVA as the primary encapsulation layer for photovoltaic (PV) modules, valued for its optical clarity, transmittance, and processability on advanced film-lamination lines. The material’s crosslinking under thermal curing ensures efficient light transmission, protection against moisture ingress, and mechanical resilience throughout long-term field operation. Leading PV module lines integrate this raw material through precision extrusion calendaring, followed by in-line curing during lamination, as dictated by global industry requirements for high and stable conversion efficiency.

Industry compliance standards

• IEC 61215, IEC 61730 (PV module performance and safety)
• UL 1703 (Standard for Flat-Plate Photovoltaic Modules and Panels)
• RoHS Directive 2011/65/EU (Restriction of Hazardous Substances in electrical equipment)
• REACH Regulation (EC) No 1907/2006 (Registration, Evaluation, Authorisation and Restriction of Chemicals)

Typical usage ratio

• Core film layer: 65%–80% by weight in encapsulant formulation, with balance occupied by stabilizers, crosslinkers, and optical brighteners; fine-tuning occurs to match cell type and local UV spectrum exposure.

Downstream process integration

• Direct extrusion of EVA pellets to cast film
• Mixing with UV and anti-aging additives prior to film extrusion
• Inline lamination and crosslinking at 140–155°C on PV module manufacturing lines
• Edge-trimming and sheet registration before glass/silicon sandwich assembly

Final product types

• Monocrystalline and polycrystalline silicon solar panels
• Flexible photovoltaic modules
• Bifacial solar modules for utility and rooftop applications
• Building-integrated photovoltaic glass panels

2. Hot Melt Adhesive Formulations

Producers of hot melt adhesives rely on this EVA copolymer’s balance of softness and cohesion to achieve rapid tack and mechanical strength for packaging, nonwoven, and woodworking sectors. Processing lines employ precise metering of the copolymer with tackifiers, waxes, and process oils, controlling viscosity and open time in the final product while allowing for clean application and minimal stringing at dispense. The customized ratio in each formulation depends on machinery type, end-use substrate, and product flow requirements.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for food packaging indirect contact)
• EN 923 (Adhesives—Terms and definitions, industry terminology framework)
• ISO 9001:2015 (Quality management system in adhesives and tape factories)
• GB/T 2793-2011 (Chinese national standard—Test methods for adhesives peel strength)

Typical usage ratio

• Main resin: 22%–45% w/w in block, pellet, and stick hot melt formulations, varied for peel strength, set speed, and viscosity range as established during pilot trials.

Downstream process integration

• Integration into melt mixing kettles with direct loading of EVA granules
• Blending with hydrocarbon and rosin ester tackifiers under elevated temperature (130–170°C)
• In-line degassing, extrusion and pelletizing, or block casting
• QC testing for viscosity, open time, and set time on batch samples before filling

Final product types

• Hot melt glue sticks for industrial applicators
• Carton sealing adhesives for automated packaging plants
• Pressure-sensitive adhesive tapes and labeling adhesives
• Disposable hygiene and nonwoven bonding adhesives

3. Cable Compound and Wire Insulation

Wire and cable manufacturers incorporate this material as the flexible base resin for low- and medium-voltage cable insulation, using it to achieve stable dielectric properties, environmental resistance, and consistent processability during extrusion with inorganic fillers and stabilizer systems. Enhanced formulations meet diverse inner sheath, bedding, and primary insulation requirements in energy, communications, and infrastructure applications, demanding high QA traceability from base resin through to finished cable reels.

Industry compliance standards

• UL 1581 (Reference standard for electrical wires, cables, and flexible cords)
• IEC 60502-1 (Power cables with extruded insulation)
• RoHS 2011/65/EU (Restriction of Hazardous Substances in electrical/electronic equipment)
• GB/T 2951.14-2008 (Chinese national insulation material test standards)

Typical usage ratio

• Bulk insulation compound: 45%–60% w/w as base resin, modified by antimony oxide flame retardant, silanes, and plasticizers based on desired cable flexibility and voltage class.

Downstream process integration

• Pre-compounding with crosslinkers and thermal stabilizers in Banbury mixers
• Twin-screw extrusion onto copper/aluminum conductors under controlled melt pressure
• Sequential extrusion for multi-layer composite cables
• Online spark and tension testing during spooling

Final product types

• Building wiring insulation granules
• Data cable jackets and insulation layer
• Power and control cable sheaths
• Automotive wire insulation for low-voltage circuits

4. Footwear Foam and Injection Moulding

Shoe component producers value this EVA grade for its balance of processability, elasticity, and cell structure formation in foam midsole, insole, and outsole production. Closed-cell foam lines employ physical or chemical blowing methods, adjusting loading levels to control expansion, rebound, and abrasion resistance for specific categories such as athletic, safety, or casual footwear. Direct-injection systems combine EVA with crosslinkers and pigments for differentiated density, color, and wear performance.

Industry compliance standards

• ISO 20871:2018 (Footwear—Test methods for upper, lining and insock materials)
• GB/T 15107-2013 (Chinese national standard—Sports shoes safety/performance)
• EN ISO 20345:2022 (Personal protective equipment—Safety footwear)
• REACH Regulation (EC) No 1907/2006 (Regulation on chemicals for safe handling in consumer goods)

Typical usage ratio

• Foam base: 60%–85% EVA by mass pre-expansion, with remaining portion comprising blowing agents, fillers (talc, calcium carbonate), and functional crosslinkers. Ratios are tuned to density target and end-use cushioning requirements.

Downstream process integration

• Batch mixing with blowing agents and cell control additives
• Compression or injection molding into foam sheet, block, or direct sole shapes at 150–185°C
• Curing and cutting/trimming to dimension; QC physical performance tests
• Optionally flocking, coating, or coloring for fashion and branding lines

Final product types

• Sports, running, and children’s shoe midsoles
• Industrial safety footwear with anti-slip soles
• Cushioned sandals and flip-flop soles
• Comfort insoles for orthopedic and consumer footwear

5. Flexible Packaging Films

Flexible packaging converters adopt EVA as a modifier resin in multilayer co-extruded films, which enhance sealability, clarity, and puncture resistance. During production, precision gravimetric feeders and extruders accurately dose the EVA into the molten blend with LDPE and LLDPE based on end customer specifications. The additive’s melt characteristics provide easy heat sealing at lower temperatures and improve film mechanics, which is vital for fresh food, medical device, and consumer pouch formats.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymers for contact with food)
• EU Regulation No. 10/2011 (Plastics materials for food contact)
• EN 1186 (Materials in contact with foodstuffs—Test methods for plastics)
• ISO 22000:2018 (Food safety management in packaging materials)

Typical usage ratio

• Modifier for heat-seal films: 8%–18% by weight in total resin blend, with level adjusted in direct consultation with film gauge, sealing temperature, and packaging speed parameters.

Downstream process integration

• Co-extrusion with LDPE/LLDPE on blown/cast film lines
• Compounding with slip, anti-block, and antifog additives in upstream blending silos
• Inline corona treatment and winding for lamination readiness
• QC for gauge control, sealing strength, and optical properties

Final product types

• Vacuum pouch films and seals for processed meats and cheeses
• Barrier packaging for medical consumables
• Bread, fruit, and frozen food bags
• Multipack wrapping film for consumer textile, hygiene, and cosmetic goods