Applications of DuPont Elvax 350 EVA in Industrial Manufacturing

As a producer of DuPont Elvax 350 EVA, we supply this premium ethylene-vinyl acetate copolymer to a range of industrial sectors requiring precise performance attributes. Our Elvax 350 EVA grades consistently deliver function-specific properties in high-volume manufacturing environments, from flexible packaging to adhesive technologies. Below, we outline key application segments where our material is integrated into established industrial processes under real-world standards and practices.

1. Hot Melt Adhesive Formulations

Packaging, woodworking, and hygiene industries utilize Elvax 350 EVA as a primary base polymer in the manufacture of hot melt adhesives that demand a balance of flexibility, tack, and cohesive strength. The vinyl acetate content of this grade enables process engineers to fine-tune viscosity and open time for a variety of lamination and assembly tasks, supporting fast-cycle production and strong substrate bonding.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for indirect food contact)
• REACH (EU Regulation 1907/2006)
• ASTM D3236 (Softening Point standards for thermoplastic adhesives)
• ISO 9001:2015 certified QM systems at converter facilities

Typical usage ratio

• 15–35% by total adhesive mass; variation depends on required hardness and set time, with adjustments for formulated tackifiers, plasticizers, and waxes.

Downstream process integration

• Melt blending in Z-blade mixers or extruders prior to compounding
• Pelletization for conversion into hot melt sticks, pillows, or granules
• In-line filtration and metering prior to drum-filling or application directly to substrates

Final product types

• Hot melt glue sticks for industrial assembly
• Case and carton sealing adhesives for packaging
• Disposable hygiene article construction adhesives
• Pressure-sensitive label and tape adhesives

2. Flexible Food Packaging Films

Food processors and flexible converters incorporate Elvax 350 EVA as a sealing layer or impact modifier in multilayer co-extruded films. The copolymer’s clarity, toughness, and low sealing initiation temperature support high-speed film lines, minimizing seal failure and enabling reduced energy use during pouch and bag sealing.

Industry compliance standards

• U.S. FDA 21 CFR 177.1350 (Ethylene-Vinyl Acetate for Food Contact Applications)
• EU Regulation (EU) No 10/2011 (Plastics for food packaging)
• GMP Regulation (EC) 2023/2006
• ISO 22000:2018 food safety management at film converters

Typical usage ratio

• 12–28% of the sealing layer, co-extrusion blend varies with barrier resin, film thickness target, and peel strength specification.

Downstream process integration

• Direct dosing into multi-zone cast film and blown film extruders
• Incorporation as modifier or tie layer in ABA and ABC layered structures
• On-line corona or flame treatment for improved print adhesion

Final product types

• Vacuum pouches and shrink bags for fresh/frozen proteins
• Lidding films for dairy and ready meals
• Form-fill-seal web films for snacks, bakery, and produce
• Peelable films for trays and pouches

3. Wire and Cable Insulation Compounds

Electrical cable manufacturers select Elvax 350 EVA as a matrix resin in non-halogenated wire and cable formulations, particularly where flame resistance, flexibility at low temperatures, and processability are critical. The copolymer’s efficiency supports consistent extrusion throughput and crosslinking, ensuring stable insulation characteristics during both high- and low-voltage cable production.

Industry compliance standards

• UL 62 (Flexible cord and cables)
• IEC 60502 (Power cables with extruded insulation)
• RoHS Directive 2011/65/EU (Restriction of Hazardous Substances)
• CSA C22.2 No. 49 (Canada, Flexible cords and cables)

Typical usage ratio

• 35–55% within total compound; the proportion depends on desired dielectric strength, flame retardant loading, and mechanical properties. Higher ratios in low-smoke, halogen-free cable types.

Downstream process integration

• Dry mixing with mineral fillers and flame retardants
• Melt compounding in twin-screw extruders
• Pelletizing before feeding to insulation extrusion lines
• Optional silane crosslinking in cable production for enhanced heat resistance

Final product types

• Building wire and low-voltage power cables
• Flexible appliance cords
• Automotive battery cables and control cables
• Signal and telecommunication cables

4. Solvent-Based and Aqueous Printing Inks

Leading ink manufacturers incorporate Elvax 350 EVA resin as a film-forming binder in inks produced for flexible packaging, specialty labels, and overprint varnishes. Its controlled melt index and unique balance between elasticity and adhesion enable uniform laydown and print durability across a variety of flexible substrates, including polyethylene and polyester films.

Industry compliance standards

• Swiss Ordinance (SR 817.023.21) on materials for food contact inks
• EuPIA GMP (Good Manufacturing Practice) for printing inks
• ISO 2846-1 (Pigment binding in printing inks)
• U.S. FDA 21 CFR 176.170 (Indirect food contact for packaging prints)

Typical usage ratio

• 4–12% of total ink formulation; adjusted based on pigment loading, viscosity requirements, and drying speed. Higher loadings used in coatings and primers for barrier performance.

Downstream process integration

• Dissolution in solvents or water with high-shear mixers to form a stable binder phase
• Pre-dispersion prior to pigment milling for particle wettability and stability
• Integration into flexographic or gravure printing ink systems, followed by filtration and standard quality testing

Final product types

• Packaging inks for snack bags and frozen food wrappers
• Heat-sealable overprint varnishes for flexible films
• Water-based inks for compostable or recyclable paperboard containers
• Specialty coatings for pharmaceutical blister packs and medical pouches

5. Footwear and Sports Equipment Foam

Producers of athletic footwear midsoles and protective gear specify Elvax 350 EVA as a co-polymer source for physical foaming, leveraging its cell-formation control and energy rebound properties. The material enables lightweight crosslinked and non-crosslinked foam structures, providing consistently high impact absorption and compression set performance suitable for automated molding lines.

Industry compliance standards

• ISO 20344:2021 (Footwear testing methods)
• EN 71-3:2019 (Safety requirements for craft and sports articles)
• REACH (EC 1907/2006, restricted substances in finished goods)
• CPSIA (U.S. Consumer Product Safety for children's footwear)

Typical usage ratio

• 55–85% in foam batch; proportion depends on intended hardness, expansion ratio, and physical property targets, with lower ratios in blends for dual-density constructions.

Downstream process integration

• Batch mixing with crosslinking agents, blowing agents, color masterbatches
• Compression molding or injection molding for foam slab and shape formation
• Post-expansion by steam or hot air curing for controlled cell structure

Final product types

• Shoe midsoles and insoles for running and walking shoes
• Protective pads for helmets, gloves, and sporting equipment
• Impact-absorbing mats for gymnasium and play area surfacing
• Orthotic and medical cushioning devices