Applications of Reliance RELENE EVA2540 EVA in Industrial Manufacturing

Reliance RELENE EVA2540 EVA, featuring high vinyl acetate content and balanced melt flow, serves multiple core industries with demanding polymer performance requirements. As the direct manufacturer, we support large-scale industrial partners in integrating this material into advanced manufacturing streams where precision and compliance are essential.

1. Photovoltaic Encapsulant Film Production

Photovoltaic module manufacturers use this grade for encapsulant films to provide optical clarity, strong adhesion to glass and cell surfaces, and enduring UV stability. The material’s melt strength and compatibility with cross-linking agents enable efficient extrusion and precise film lamination, critical for solar energy yield and module durability.

Industry compliance standards

• IEC 61215 for crystalline silicon module qualification
• UL 1703 for PV module safety
• RoHS Directive (2011/65/EU) for hazardous substances
• REACH Annex XVII (regulations on restricted chemicals)

Typical usage ratio

• Resin loading 60–80 wt% as base matrix; cross-linking agent (e.g., peroxide) 2–5 phr; ratio adjusted according to target gel content and film fusion speed

Downstream process integration

• Resin pellets dry-blended with functional additives, followed by twin-screw extrusion to sheet
• Sheet calendered and cut for sandwich layup between glass and PV cell before in-line lamination
• Thermal cross-linking under pressure; post-lamination inspection for gel content and transmission

Final product types

• PET-laminated solar cell encapsulant film
• Smart glass modules for architectural PV
• Bifacial and standard crystalline PV panels
• Flexible and lightweight thin-film solar sheets

2. Hot Melt Adhesives for Packaging & Bookbinding

Industrial adhesives based on this material enable high-speed carton sealing, case forming, and book spine gluing lines. The copolymer structure supports rapid set time, cold flexibility, heat resistance, and long-running stability needed for continuous packaging operations under compound, aqueous, or hot air environments.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives in indirect food contact)
• ISO 9001-certified QC for raw material traceability
• EN 923 for adhesive terminology and testing
• ISTA testing for transport packaging integrity

Typical usage ratio

• EVA base resin 35–45 wt% in total adhesive solids; tackifier 25–35%; plasticizer 10–25%; ratio tuned by target tack, set speed, and substrate type

Downstream process integration

• Direct melting in jacketed mixing tanks; blending with tackifiers, waxes, antioxidants
• Homogenization under controlled temperature (130–180°C)
• Filling into pellets or blocks for hot melt guns, slot coaters, or spiral spray systems

Final product types

• Case and carton closing hot melt adhesives
• Bookbinding glues (perfect binding, side gluing)
• Permanent and removable label adhesives
• Pallet stabilizers for automatic packing lines

3. Wire and Cable Compound Manufacturing

EVA-based compounds, using this grade, deliver consistent dielectric properties and processability for low voltage and signal cable insulation and sheathing. The base polymer ensures flame retardancy, flexibility at sub-zero temperatures, and retains elongation after extrusion, supporting reliable power and data transfer.

Industry compliance standards

• IEC 60227 / IEC 60332 for cable insulation and flame retardance
• UL 62, UL 1581 for flexible cords and wires
• RoHS (2011/65/EU) for heavy metals and restricted substances
• ASTM D2843 for smoke density

Typical usage ratio

• EVA 17–28 wt% in halogen-free flame retardant (HFFR) cable compounds; loading rate varied according to flexibility and fire resistance requirements; ATH or MDH fillers 60–70 wt%

Downstream process integration

• Pre-mixed with flame retardant fillers, antioxidants, and UV stabilizers in a high-intensity mixer
• Sent through twin-screw extruder or Banbury mixer; pelletized or fed directly to extrusion line for jacketing or insulation
• Post-extrusion online capacitance and spark testing for insulation quality

Final product types

• Building wire insulation (up to 300V/600V)
• Instrumentation and control cable jackets
• Low smoke, halogen-free power cable sheaths
• Flexible appliance and electronic device cables

4. Foam Injection and Sheet Extrusion for Footwear Industry

This EVA grade is a key base for foamable compounds in sports, leisure, and safety footwear. Its rheology enables uniform cell structure and resilient cushioning properties after injection or extrusion. Formulators achieve variable hardness and rebound through precise cross-linking and blowing agent systems.

Industry compliance standards

• EN ISO 20344/20347 for occupational footwear properties
• REACH SVHC compliance for consumer exposure
• ISO 9001 process traceability for critical applications
• GB/T 15107 for Chinese EVA resin foam standards

Typical usage ratio

• EVA 55–75 wt% in compound; cross-linking agent (DCP) 1.5–2.2 phr; blowing agent (ADC) 10–18 phr; filler levels (CaCO3) adjusted by hardness specification

Downstream process integration

• Compound batch mixing in internal mixer, with sequential addition of curatives and foaming agents
• Either direct injection molding (single-layer and dual-density midsoles) or continuous sheet extrusion followed by press foaming
• Demolding, trimming, and surface finishing in automated lines

Final product types

• Sports shoe soles (running, training, tennis)
• Leisure sandal and slipper foams
• Work and safety boot midsoles
• Insoles and shock-absorbing padding

5. Flexible Packaging Film for Food Applications

Co-extruders use this resin to improve sealability and impact resistance in multi-layer food packaging. Its compatibility with LDPE and LLDPE supports haze-free, soft-touch films that withstand repeated flexing. Compliance with strict food safety protocols is maintained throughout the extrusion and conversion process.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymers for food contact)
• EU Regulation (EU) No 10/2011 on plastics for food packaging
• GMP (EC) 2023/2006 for production of food contact materials
• China GB 9685 for food additive use

Typical usage ratio

• EVA blended at 10–20 wt% with PE-based matrices; increased up to 30% for peelable or resealable lid films; proportion controlled by target puncture resistance and heat-seal window

Downstream process integration

• Dry blending with LDPE/LLDPE resins, then melt-fed into blown or cast film extruders
• In-line lamination or coating as middle or tie layer in multi-layer structures
• Corona treatment, printing, and slitting for roll-stock supply to converters

Final product types

• Vacuum and MAP (modified atmosphere) packaging films
• Peelable lidding films for ready-meal trays
• Dairy and snack pouch films
• Frozen food and bakery bag films

6. Toy Molding and Safety Mat Applications

Large-scale toy and recreational mat fabricators use this resin to achieve bright color acceptance, repeated compression recovery, and non-splitting softness. Tailored foaming, pigmentation, and safety compounding methods ensure adherence to global child safety protocols and test certification for end-use environments.

Industry compliance standards

• EN 71-3 for toy material safety (European)
• ASTM F963 for US toy safety
• ISO 8124 for international toy testing
• CPSIA (Consumer Product Safety Improvement Act) for lead and phthalate content

Typical usage ratio

• EVA resin 60–80 wt% as foam base; color concentrates and blowing agents 10–15%; ratio by target cell density and softness per application

Downstream process integration

• Compounded and pelletized with pigments, flame retardants, and foaming agents
• Hot-press sheet foaming, die cutting, or direct injection mold shaping
• Online batch QC for compression set and tensile strength

Final product types

• Colorful floor mats and interlocking play tiles
• Soft-formed toy figures and blocks
• Protective sports mats (gymnastics, martial arts)
• Outdoor playground surfacing foam tiles