Applications of Mitsui Chemicals Evaflex EV45X EVA in Industrial Manufacturing

Evaflex EV45X EVA delivers high transparency, flexibility, and adhesion for demanding industrial applications. As the original manufacturer, we support specific production needs across diverse sectors, focusing on consistent quality, process reliability, and regulatory adherence in every downstream application.

1. Solar Photovoltaic Encapsulation

The high vinyl acetate content and excellent adhesion of EV45X enable it to serve as a key raw material for solar module encapsulation, enhancing light transmittance, electrical insulation, and weather resistance. Manufacturers compound the resin into sheets via extrusion and calendering, then laminate it with solar cells under controlled temperature and pressure cycles. Strict care during drying and lamination prevents air bubbles and delamination, while precise temperature profiling ensures uniform crosslinking without affecting electrical properties. High clarity and UV resistance make it integral for the photovoltaic value chain.

Industry compliance standards

• IEC 61215:2021—Crystalline silicon terrestrial PV modules
• UL 1703—Flat-plate Photovoltaic Modules and Panels
• IEC 61730—Photovoltaic module safety qualification
• REACH & RoHS conformity for restricted substances

Typical usage ratio

• Encapsulant sheets at 400–800 microns thickness, forming 7–12% of module stack by weight. Process engineers adjust based on cell type, glass spacing, and crosslinking agent percentage.

Downstream process integration

• Feeds the extrusion and calendering lines to make encapsulant films
• Laminated between tempered glass and cell arrays before crosslinking/curing
• Used in automated vacuum lamination systems

Final product types

• Silicon solar panels (mono- and polycrystalline)
• Glass/glass and glass/backsheet PV modules
• BIPV panels

2. Footwear Sole Compound Manufacturing

EVA copolymers form the main elastomeric base for midsole and outsole blending in athletic, casual, and safety footwear. The soft, impact-absorbing characteristics deliver measurable rebound and flexibility. Producers incorporate EV45X into compounding lines with crosslinking and foaming agents, kneading the melt uniformly prior to injection or compression molding. Modifiers for slip, abrasion, and color stability also blend in here. Quality control in mixing, curing, and cooling stages achieves uniform density, cell structure, and stable mechanical properties aligned to downstream fashion and safety markets.

Industry compliance standards

• ISO 20345—Personal protective equipment—Safety footwear
• EN ISO 20871—Footwear—Outsole abrasion and slip resistance testing
• REACH SVHC restrictions (EU)

Typical usage ratio

• 25–80% of compound by weight per formulation. Adjustments depend on required hardness (Shore A), elasticity, and injection vs. compression molding process.

Downstream process integration

• Compounding with fillers, crosslinkers (DCP), blowing agents, and colorants
• Kneading in internal mixers or twin-screw extruders
• Feeding directly into sole molding machinery

Final product types

• Running shoe midsoles and outsoles
• Children’s shoes and slippers
• Anti-slip, anti-static work footwear soles

3. Hot Melt Adhesive Formulation

EV45X, due to its balance of melting point, flexibility, and adhesion to polar and non-polar substrates, forms a key polymer base for industrial hot melt adhesives. Manufacturers precisely weigh and blend EVA with waxes, tackifiers, plasticizers, and stabilizers in large mixers or extruders, controlling melt flow and open time for automated application. End users run high-speed coaters or bead application heads for bookbinding, carton sealing, woodworking, and hygiene product assembly. QC protocols monitor viscosity, peel strength, and thermal stability batch to batch.

Industry compliance standards

• FDA 21 CFR 175.105—Adhesives for food packaging (indirect contact)
• ISO 9001 certified adhesive production
• ASTM D816—Standard test for adhesives (bookbinding/hot melt)

Typical usage ratio

• 20–60% of total adhesive blend by weight; precise content determined by target softening point, peel adhesion, and substrate type in end-use environment.

Downstream process integration

• Blending in jacketed mixers or twin-screw extruders at 100–180°C
• Pumped or pelletized for feed into hot melt lines
• Direct coating onto substrates or drum storage for later use

Final product types

• Bookbinding and magazine adhesives
• Case sealing and package closing glues
• Hot melt tapes and labels

4. Wire and Cable Sheathing Compounds

Wire and cable manufacturers employ EV45X-based compounds for primary insulation and inner sheaths in low- to medium-voltage electrical cables. The high dielectric strength, chemical resistance, and stress-crack performance contribute to long cable lifespans. Processers use vacuum mixing and melt compounding with stabilizers, flame retardants, and plasticizers. Strict control over gel content, melt flow, and crosslinking ensures compliance with cable standards and stable extrusion during continuous high-speed jacketing. Pigment and fire-resist modification is customized per cable type.

Industry compliance standards

• IEC 60502—Power cables with extruded insulation
• UL 83—Thermoplastic-Insulated Wires and Cables
• RoHS Directive 2011/65/EU on cable materials

Typical usage ratio

• 30–60% of sheathing compound by weight, varying based on voltage rating, flame retardancy, and installation flexibility requirements.

Downstream process integration

• Premixed with antioxidants and flame retardants in melt mixers
• Feeds directly into extrusion lines for wire coating
• Online crosslinking and surface cooling for dimensional stability

Final product types

• Low-voltage building wires
• Flexible appliance cords and data cables
• Automotive wire harnesses

5. Film Blowing for Industrial and Food Packaging

Flexible film converters utilize EV45X for co-extruded and mono-layer film production, targeting applications that demand clarity, sealability, and tear resistance. The resin’s melt strength and elasticity enable stable bubble formation in blown film towers, while precise die and cooling ring control yields uniform film thickness. Downstream use cases include heat-sealable food bags, agricultural mulch film, and medical device packaging, with process settings carefully adjusted to meet migration and barrier requirements under global food contact regulations.

Industry compliance standards

• EU No 10/2011—Plastics materials for food contact
• FDA 21 CFR 177.1350—Ethylene-vinyl acetate copolymer in food packaging
• ISO 17088—Compostable plastics (where compostability is required)

Typical usage ratio

• 20–40% in co-extruded layers or pure EVA for highly flexible/soft touch films. Proportion varies based on film gauge, line speed, and functional additive levels.

Downstream process integration

• Direct feed into blown film or cast film extruders
• Co-extrusion with LDPE/LLDPE/HDPE as core or skin layers
• Film slitting, printing, and lamination downstream

Final product types

• Food-grade heat sealable films and pouches
• Agricultural mulch films
• Medical device header bags and liners