Applications of Mitsui Chemicals Evaflex EV220 EVA in Industrial Manufacturing

Mitsui Chemicals Evaflex EV220 EVA is a high-quality, low gel-content ethylene-vinyl acetate copolymer. As a direct manufacturer with expertise in compounding and process optimization, we supply this grade to industrial customers for advanced product formulations. Below, we detail its proven performance in key segments, listing critical compliance, precise formulation ratios, process points, and real-world end products.

1. Solar Photovoltaic Encapsulation

EV220 serves as a primary resin for lamination sheets in photovoltaic module manufacturing. Its controlled melt index and clarity allow reproducible embedding of solar cells while achieving strong adhesion and stability during lamination at 150–160°C. Manufacturers rely on stringent lot consistency to minimize module delamination risk during field service. Processed in advanced extrusion and calendaring lines, the resin maintains uniform flow and robust thermal endurance essential for long-term PV operation.

Industry compliance standards

• IEC 61215:2016 (crystalline silicon terrestrial PV modules)
• UL 1703 (Standard for Flat-Plate Photovoltaic Modules and Panels)
• ISO 9001 certified QC for traceability
• RoHS Directive (2011/65/EU) for hazardous substances

Typical usage ratio

• 60–75% EV220 (by weight of sheet); remainder: crosslinking agents, optical stabilizers, UV absorbers
• Ratio depends on lamination line speed and cut-sheet thickness

Downstream process integration

• Resin introduced at sheet extrusion or calendaring step
• Heat lamination occurs post cell stringing, before junction box assembly

Final product types

• Mono- and polycrystalline silicon PV panels
• Flexible thin-film solar modules
• BIPV glass-laminate panels

2. Foamed Sports Soles and Footwear Components

EV220 EVA is a preferred raw material for the injection and compression molding of midsole and outsole compounds in technical sports and lifestyle footwear. Its vinyl acetate content (approx. 19–23%) offers fine-tuned resilience, abrasion resistance, and cushioning preferred by leading sports brands. Granules blend with cross-linkers and fillers during compounding. Molders target precise community densities to deliver specified energy return and durability.

Industry compliance standards

• REACH Regulation (EC No 1907/2006) on safe substances
• ISO 20345:2011 for safety, protective footwear
• EN 12568 for mechanical properties in footwear
• BSCI social responsibility certification (common in large-scale OEMs)

Typical usage ratio

• 55–75% EV220, adjusted per hardness/density target (e.g., higher EVA content for soft running midsoles)
• Balance: foaming agents (azodicarbonamide, etc.), crosslinkers (DCP), pigments, stabilizers

Downstream process integration

• Mixed in high-shear compounding extruders pre-foaming
• Injection or compression molded into shoe sole forms; secondary crosslinking by heating

Final product types

• Running and training shoe midsoles
• Sandals and slippers (EVA-based)
• Work safety shoe soles
• Orthopedic and comfort shoe inserts

3. Hot Melt Adhesives for Packaging and Bookbinding

Industrial users select EV220 as the main base polymer for formulating pressure-sensitive and hot-melt adhesives used in automated packaging, labelling, and notebook binding production lines. Its tailored melt viscosity enables rapid, clean application within automated dispensers and ensures controlled open/setting times. The resin’s compatibility with tackifiers and wax modifiers allows precise tuning for carton closure, envelope sealing, and perfect binding of book spines.

Industry compliance standards

• FDA 21 CFR 175.105 (adhesives for indirect food contact)
• EN 923:2005+A1:2008 (standard adhesive classification)
• ISO 9001 QA system for mixing and batch control
• REACH Annex XVII for restricted chemicals

Typical usage ratio

• 30–60% EV220 by adhesive mass, based on final viscosity and peel strength requirement
• Tackifiers, waxes, and plasticizers comprise rest of blend

Downstream process integration

• Dispersed or pre-blended in adhesive tanks before hot application
• Applied as molten adhesive on packaging lines or perfect binders

Final product types

• Corrugated box sealing adhesives
• Paper and paperboard packaging lamination
• Book and notebook spine adhesives
• Self-adhesive labels and tapes

4. Wire and Cable Insulation Compounds

EV220 enables compounding of high-purity cable insulation and sheathing, offering stable dielectric performance and elongation for use in communication or low voltage power cables. With a balanced melt index and fine dispersion, compounding lines extrude uniform jackets or insulation layers, meeting electrical and mechanical specifications for wire harness OEMs. The material allows blending with flame retardants, process aids, or plasticizers according to end requirements.

Industry compliance standards

• IEC 60502-1 (power cables with extruded insulation and sheath)
• UL 1581 (Reference Standard for Electrical Wires, Cables, and Flexible Cords)
• RoHS compliance (2011/65/EU)
• ISO/TS 16949 for automotive cable compounds

Typical usage ratio

• 40–70% EV220 in the compound depending on required electrical/mechanical properties
• Flame retardants, fillers, and plasticizers added to achieve safety and flexibility

Downstream process integration

• Dry blended with additives in twin-screw extruders
• Applied as extrusion insulation layer after conductor stranding

Final product types

• Communication cable insulation
• Automotive wire sheath
• Instrument signal cable jackets
• Building wire for indoor installations

5. Film and Sheet for Food Packaging

In food packaging film production, converters use EV220 as a co-extruded sealing layer or as a modifier in blend films to enhance clarity, flexibility, and seal integrity. Its balanced VA content gives excellent low-temperature sealability and chemical resistance necessary for processed food, dairy, and confectionary packaging. The resin meets global food contact requirements, and film properties can be adjusted through extrusion parameters and co-polymer ratios.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymers for food contact)
• EU Regulation No 10/2011 (Plastic materials and articles in contact with food)
• GB 9685-2016 (China National Food Safety Standard)
• BRC Packaging and Packaging Materials Standard

Typical usage ratio

• 10–40% EV220 blended with LDPE or LLDPE in multilayer film structures
• Ratio changes based on desired sealing temperature and film flexibility

Downstream process integration

• Incorporated during extrusion or co-extrusion as a sealing or modifier layer
• Films slit and wound for form-fill-seal lines or converted to pre-made pouches

Final product types

• Flexible food packaging films (meat, dairy, bakery)
• Lamination films for pouch structures
• Dairy lid seals
• Processed food wraps

6. Pharmaceutical and Medical Device Packaging Films

Pharmaceutical thermoformers select EV220 for its clean extractables profile and long-term plasticizer-free flexibility in blister and medical device tray films. The material’s thermal characteristics allow deep-draw processing without weakening, supporting precise barrier design for humidity, light, and oxygen protection in medication and sterile device packs. Blends meet high regulatory demands for purity and migration testing in critical health product applications.

Industry compliance standards

• USP 661.1 (Plastic Packaging Systems and Their Materials of Construction)
• EU Regulation No 10/2011 for pharmaceutical contact
• FDA Drug Master File referencing
• ISO 13485 (Medical device quality management systems)

Typical usage ratio

• Up to 30% EV220 in pharmaceutical-grade film blends, depending on performance targets for flexibility and clarity
• Balance: specialized barrier polymers or medical-grade polyolefins

Downstream process integration

• Processed in multilayer co-extrusion, as core or sealing layer in blister/lidding films
• Films thermoformed into cavity structures, then sealed with medical-grade lids

Final product types

• Pharmaceutical blister packs for tablets and capsules
• Sterile medical device trays
• Diagnostic reagent strip packaging
• Transdermal patch liners