Applications of Reliance RELENE EVA1240 EVA in Industrial Manufacturing

Reliance RELENE EVA1240 EVA serves as a key polymer material in several advanced processing fields, offering precise property control across diverse industrial applications. As the direct manufacturer, we ensure this ethylene vinyl acetate copolymer meets critical performance and regulation demands required for downstream converters and compounders in high-volume operating environments.

1. Solar Photovoltaic Encapsulation Sheets

Manufacturers in the renewable energy sector depend on EVA1240 to produce encapsulation sheets for photovoltaic modules. Our copolymer enables controlled crosslinking, high transparency, and stable adhesion to solar cells, addressing durability requirements against UV exposure and thermal cycling. Converters integrate the resin in calendaring and extrusion lamination processes, targeting high yield in automated sheet manufacturing lines.

Industry compliance standards

• IEC 61215: Crystalline silicon terrestrial PV modules
• UL 1703: Standard for flat-plate PV modules
• RoHS Directive (2011/65/EU) compliance
• EN 50548: Junction boxes for PV modules

Typical usage ratio

• 70%–100% base polymer in core encapsulant mix
• Blend ratio adjusted by crosslinking additive load and solar cell type
• Minor adjustment (up to 15%) for various UV absorbers and stabilizers

Downstream process integration

• Direct feedstock for sheet extrusion in twin-screw lines
• Crosslinking initiators incorporated pre-extrusion
• Thermal lamination of encapsulant sheet onto solar glass assembly

Final product types

• PV encapsulation film
• Double-glass solar module intermediates
• Backsheet-laminated PV panels

2. Hot Melt Adhesives for Packaging and Hygiene Products

Hot melt adhesive compounders use EVA1240 to deliver adhesives with tailored softness, hot tack, and open time. The high vinyl acetate content allows precise viscosity adjustment for automated carton sealing, bookbinding, and hygiene application lines. Processors dose the resin in high-shear mixers with tackifiers, waxes, and stabilizers to match end-user coating and spray equipment requirements.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for food packaging)
• REACH Regulation (EC) No 1907/2006
• ISO 9001 Quality Management for adhesives
• ASTM D4498 for hot melt adhesive testing

Typical usage ratio

• 25%–50% of total polymer content in hot melt adhesives
• Adjusted for open time, substrate bonding requirements, and application temperature
• Blended with 10%–30% tackifier and 5%–20% wax modifier

Downstream process integration

• Melting in temperature-controlled mixing tanks
• Continuous compounding with tackifiers and other modifiers
• Direct transfer to pelletizing or block forming units for end-user supply

Final product types

• Hot melt adhesive pellets and pillows
• Preform slugs for automated carton assembly
• Bookbinding spine adhesives
• Hygiene pad and diaper construction adhesives

3. Footwear Injection Foams and Sheetings

Industrial footwear component manufacturers utilize this grade for injection foaming and compression molding processes. The ethylene-vinyl acetate chemistry delivers foam midsoles and outsole sheets with specific density, elasticity, and resilience targets critical for athletic, safety, and leisure footwear. Advanced processors calibrate peroxide or azodicarbonamide-based blowing agent systems with the copolymer during direct injection molding cycles.

Industry compliance standards

• EN ISO 20344: Personal protective equipment - footwear test methods
• GB/T 15107: Technical specification for EVA shoe material
• ISO 9001 certified manufacturing processes
• California Prop 65 compliance for consumer safety

Typical usage ratio

• 60%–95% main matrix in foamable footwear compounds
• Loading adjusted with up to 20% crosslinker and 10% blowing agent by process
• Fillers or color masterbatches included up to 15%, based on application

Downstream process integration

• Dry blending prior to compounding for foamable granules
• Slot dosing at injection molding machine for direct compounding in footbed and outsole production
• Compression molding for multilayer sheeting and form-stable midsoles

Final product types

• Foam midsoles in athletic shoes
• Antistatic shoe outsoles for workwear
• EVA comfort insoles
• Shock-absorbing heel pads

4. Wire and Cable Primary Insulation Compounds

This EVA grade plays a central role as the base polymer in low voltage wire and cable insulation, especially for flexible and flame-retardant requirements. Compounders blend the copolymer with specialty flame retardants, crosslinking agents, and stabilization additives. Downstream cable makers extrude these mixes directly onto copper or aluminum conductors at tightly controlled wall thicknesses to ensure dielectric and mechanical integrity under repeated flexing cycles.

Industry compliance standards

• UL 62 and UL 83 for flexible cords and wires
• IEC 60502-1: Power cables with extruded insulation
• RoHS 2011/65/EU lead-free regulation
• CSA C22.2 No.49: Flexible cords and cables

Typical usage ratio

• 40%–80% primary matrix in insulation compound
• Adjusted with 20%–40% flame retardants and 1%–5% crosslinkers (e.g., DCP)
• Minor content (up to 5%) for color and UV stabilization

Downstream process integration

• Melt compounding in continuous banbury or twin-screw extruders
• Direct extrusion as primary insulation layer over stranded wire
• In-line crosslinking via electron beam or silane curing, as per product design

Final product types

• Flexible appliance cords
• Low-smoke, halogen-free instrument cables
• Power tool leads
• Portable building wire insulation

5. Film-Blown Packaging and Coating Applications

Film processors use EVA1240 to produce sealant layers in multilayer films for food packaging, pharmaceutical pouches, and industrial liners. The material provides targeted hot-tack, seal integrity, and puncture resistance. The copolymer can be directly extruded or co-extruded onto polyethylene and barrier substrates using high-speed blown film lines, delivering specific gauge control and moisture barrier properties demanded by converters and FMCG brands.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymers for food contact)
• EU Regulation (EC) No 1935/2004 on materials for food contact
• ISO 22000: Food safety management applied to packaging
• GMP Regulation (EU) No 2023/2006

Typical usage ratio

• 10%–30% of total multilayer structure in sealing layers
• May rise up to 60% in monolayer films for industrial biohazard bags
• Blending ratio varies with film thickness and sealing temperature requirements

Downstream process integration

• Direct pellet feed in blown film or cast film extrusion lines
• Co-extrusion with LLDPE/LDPE in multilayer bubble production
• In-line coating on paper or foil for advanced flexible packaging

Final product types

• Easy-peel food pouches
• Pharmaceutical sachet films
• Industrial stretch wrap and liners
• Flexible tube sealant layers

6. Toys and Flexible Consumer Goods Molding

Processors supplying the toys and consumer goods markets select this EVA copolymer for soft, safe, and colorable injection-molded parts. The material’s resilience and clarity accepted by toy safety regulatory testing ensures consistent output in complex shapes. Compounders blend masterbatches and pigments with the resin in granulation units before injection or compression molding, producing flexible, chewable, and skin-safe final articles.

Industry compliance standards

• EN 71-3: Safety of toys – migration of certain elements
• ASTM F963: Standard Consumer Safety Specification for Toy Safety
• CPSIA (Consumer Product Safety Improvement Act, USA)
• ISO 8124-3: Migration of certain elements in toys

Typical usage ratio

• 65%–100% base polymer per batch, adjusted for required durometer
• 5%–25% pigment masterbatch and effect concentrate as needed
• Inclusion of blowing agent up to 10% for foam toys

Downstream process integration

• Dry blending of polymer and color concentrates prior to granulation
• Direct transfer to injection or compression molding machines
• Molded part finishing and cooling under controlled cycle times

Final product types

• Soft play balls and action figures
• Flexible beach toys
• Foam alphabet mats and puzzle tiles
• Chewable infant rattles and bath items