Applications of Mitsui Chemicals Evaflex A3020 EVA in Industrial Manufacturing

Mitsui Chemicals Evaflex A3020 EVA is a high-performance ethylene-vinyl acetate copolymer that supports precision and reliability in multiple advanced manufacturing sectors. Below, we detail how our material integrates into key downstream industries, with application-specific standards, formulation guidelines, operational process steps, and the types of end products our customers achieve.

1. Photovoltaic Encapsulation Films

Evaflex A3020 grade EVA copolymers help provide dimensional stability, adhesion, and optical clarity required in producing encapsulant films that protect solar photovoltaic (PV) modules. Manufacturers rely on its precise melt flow characteristics to achieve consistent lamination and robust weather resistance across changing environmental conditions.

Industry compliance standards

• IEC 61215 (Crystalline Silicon Terrestrial Photovoltaic Modules Design Qualification and Type Approval)
• IEC 61730 (PV Module Safety Qualification)
• UL 1703 (Standard for Flat-Plate Photovoltaic Modules and Panels)
• REACH Regulation (EC) No. 1907/2006

Typical usage ratio

• 95–99% of film formulation by weight; additive loading (crosslinkers, stabilizers) tailored based on module specification and curing requirements.

Downstream process integration

• Blending and compounding of EVA pellets, extrusion into film via flat die or blown film lines, followed by calendaring and precision slitting. Lamination occurs under vacuum and elevated temperature, where the resin crosslinks and forms the final structure within the glass-cell-glass module stack.

Final product types

• Photovoltaic encapsulation films for standard, bifacial, and glass-glass solar modules.

2. Hot Melt Adhesives for Packaging and Bookbinding

Kindly selected for hot melt adhesive manufacturing, the A3020 grade’s well-balanced vinyl acetate content and melt index help formulators control tack, flexibility, and set speed. Manufacturers leverage these properties to achieve efficient line speeds and reliable bonding in high-volume case sealing and spine adhesives for industrial bookbinding.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for Food Packaging)
• ASTM D1876 (Peel Resistance of Adhesives)
• ISO 22000 (Food Safety Management) for food-contact applications
• EN 923 (Adhesives Terminology)

Typical usage ratio

• 40–60% of total hot melt adhesive formula; dosage adjusted according to desired softening point and compatibility with waxes, tackifiers, and plasticizers.

Downstream process integration

• Direct addition into adhesive compounder; A3020 is melted and blended with resins, tackifiers, plasticizers, and stabilizers in a jacketed mixer or twin-screw extruder. The compound is filtered and pelletized or formed into blocks/slats for onward conversion.

Final product types

• Case and carton sealing hot melt adhesives, bookbinding spine glues, pressure-sensitive adhesives for packaging labels.

3. Footwear Injection Molding Compounds

Downstream footwear manufacturers value A3020 for injection-molded EVA midsoles and outsoles because it supports precise control over density, cushioning, and surface finish. Its predictable flow and compatibility with blowing agents ensure uniform expansion and elasticity essential for sports and casual shoes.

Industry compliance standards

• ISO 20344 (Footwear Test Methods)
• ISO 9001 (Quality Management Systems)
• REACH Regulation (EC) No. 1907/2006
• EN 4234 (Technical requirements for sport shoes)

Typical usage ratio

• 60–95% of the compound, adjusted down when blending with natural/rubber fillers or when high resilience is needed.

Downstream process integration

• Pellets are mixed with blowing agents, pigments, and process aids before loading into injection molding machines. The compounded EVA undergoes melting and expansion in the mold, with cycle parameters set to meet required hardness and rebound properties.

Final product types

• Injection-molded midsoles and outsoles for sports, leisure, and occupational footwear; lightweight sandal bases.

4. Wire & Cable Insulation and Sheathing

Electric wire and cable producers benefit from A3020’s uniform insulation capability and process consistency. The polymer’s flexibility and electrical properties help maintain insulation thickness, dielectrical strength, and crack resistance in environments exposed to dynamic bending and temperature cycling.

Industry compliance standards

• UL 62 (Flexible Cords and Cables)
• IEC 60502 (Power Cables with Extruded Insulation)
• RoHS Directive 2011/65/EU
• ASTM D2863 (Oxygen Index of Plastic Materials)

Typical usage ratio

• 80–100% for primary insulation layers; lower loading possible when blended with PE or flame-retardant masterbatches.

Downstream process integration

• Feeding directly into single/twin screw extruders, A3020 is melt-processed onto copper or aluminum wire, followed by in-line crosslinking (if required for elevated thermal stability and mechanical performance).

Final product types

• Power cable insulation, communication cable jacketing, automotive cable sheathing.

5. Foam Sheets for Consumer Goods and Sporting Mats

This EVA grade is widely used in continuous foam extrusion and molding to generate material with controlled cell structure, surface resilience, and color uniformity. The foam sheets support sports mat manufacturers as well as converters for packaging, toys, and leisure products, emphasizing compliance with safety and physical property requirements.

Industry compliance standards

• EN 71-3 (Safety of Toys – Migration of Certain Elements)
• REACH Annex XVII (Restricted Substances in Foam)
• ASTM F963 (Toy Safety Specification)
• ISO 845 (Determination of Foam Density)

Typical usage ratio

• 70–95% of compound; reduced when mixing with flame-retardant agents, fillers, or UV stabilizers according to product requirements.

Downstream process integration

• Pellets blended with crosslinking agents, nucleating agents, and pigments, then processed through extrusion foaming machinery with controlled steam or chemical blowing, followed by curing and cutting to size as foam planks, rolls, or tiles.

Final product types

• Sports mats, yoga mats, children’s play mats, protective foam inserts, toy components.

6. Film Modification for Flexible Packaging

Flexible packaging film exhibitors incorporate A3020 to enhance seal strength, puncture resistance, and softness in multilayer co-extruded or laminated structures. Its compatibility with LDPE improves packaging integrity for food and non-food products subject to fast production cycles and shelf-life regulations.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene–Vinyl Acetate Copolymers in Food Contact Films)
• EU Regulation No 10/2011 (Plastic Materials in Food Contact Applications)
• BRCGS Issue 6 (Global Standard for Packaging Materials)
• ISO 11607 (Packaging for Terminally Sterilized Medical Devices)

Typical usage ratio

• 3–20% as a modifier in LDPE or LLDPE base films; increased loading for higher seal strength or low-temperature flexibility.

Downstream process integration

• Co-extrusion with polyethylene resins on blown or cast film lines, where A3020 is dosed via main or side feeders. Downstream, the films are slit and laminated or printed as required by converter lines.

Final product types

• Flexible food packaging films, pouches, lidding films, medical device packaging, hygiene product overwraps.