Applications of Mitsui Chemicals Evaflex EV26035 EVA in Industrial Manufacturing

Mitsui Chemicals Evaflex EV26035 EVA supports performance and reliability across several industrial sectors. Each section below details actual downstream application segments where this grade is formulated, presenting focused information on compliance criteria, real-world formulation data, defined process steps, and specified finished goods.

1. Photovoltaic Module Encapsulation

Evaflex EV26035 is integral to the lamination of crystalline silicon solar cells, where its melting flow properties ensure tight encapsulant adhesion and low gel content to safeguard cells against moisture ingress and UV degradation. The resin is compounded with specific stabilizers and crosslinking agents, then co-extruded or laminated directly onto cell matrices before being cured in a vacuum lamination process. Its clarity, adhesion, and crosslinking uniformity are critical to long-term photovoltaic durability as specified by international solar module standards.

Industry compliance standards

• IEC 61215 Photovoltaic Module Qualification
• UL 1703 Flat-Plate Photovoltaic Modules Standards
• IEC 61730 Photovoltaic Safety Qualification
• RoHS Directive (2011/65/EU)

Typical usage ratio

• 70–80 wt% in the encapsulant layer; the exact level depends on the desired crosslinking degree, cell type, and module structure. Additive and crosslinker content adjusts as required for specific operational climates.

Downstream process integration

• Resin is pelletized, blended in dry mix feeders with UV stabilizers and curing agents, then sheet-extruded to 0.45–0.60 mm and integrated into vacuum lamination cycles at 140–155°C for crosslinking and bonding during module assembly lines.

Final product types

• Crystalline silicon solar panels
• Thin film PV modules
• Bifacial double-glass modules
• Flexible solar laminates

2. Hot Melt Adhesive Formulations

This grade serves as a primary base for industrial hot melt adhesives, valued for low gel incidence and consistent thermoplasticity needed in automobile interiors, bookbinding, and packaging applications. Its flexibility and compatibility enable precise viscosity and tack modification, facilitating continuous adhesive film or bead application lines and short cycle times demanded in high-speed automated assembly.

Industry compliance standards

• REACH Regulation (EC 1907/2006)
• FDA 21 CFR 175.105 (indirect food contact adhesives, where applicable)
• ISO 9001 Quality Management Systems
• GB/T 2793-1995 Chinese Adhesives Standard

Typical usage ratio

• 20–45 wt% of total adhesive mass; the proportion depends on required open time, temperature resistance, and bonding substrate. Formulators adjust level for bonding strength versus softness.

Downstream process integration

• EVA resin is melt-blended with tackifiers, waxes, and antioxidants in batch mixers or twin-screw extruders, then pelletized or directly cast into adhesive blocks, slugs, or films for downstream application in hot melt coating or bead dispensing equipment.

Final product types

• Book spines and cover adhesives
• Automotive interior lamination adhesives
• Case and carton sealant strips
• Disposable hygiene product assembly adhesives

3. Foam Injection and Sheet Extrusion for Footwear Midsoles

The resin is widely used by footwear manufacturers to produce lightweight, shock-absorbing midsoles via foam injection or sheet extrusion, providing resilience and cushioning for athletic and casual shoes. Specific compounding protocol using blowing agents, crosslinkers, and colorants ensures controlled cell structure and rebound, while process consistency is critical to meet brand durability and comfort targets required by global branded volume footwear contracts.

Industry compliance standards

• EN ISO 20344:2021 Footwear Test Methods
• OEKO-TEX Standard 100 Product Class I (for safe contact with skin)
• REACH SVHC Exclusion List
• SATRA TM92 Sole Bond Test

Typical usage ratio

• 45–65 wt% as the primary foamable polymer in the masterbatch. The ratio may be adjusted by footwear grade EVA demands for hardness (Shore A) and compression set.

Downstream process integration

• Mixing is undertaken in Banbury or continuous mixers with precise metering of blowing agents and crosslinkers, then sheet-extruded or directly mold-injected at 160–180°C, followed by in-mold expansion for midsole production or post-extrusion foaming in continuous sheeting operations.

Final product types

• Running and training shoe midsoles
• Casual slipper soles
• Work boot cushioning layers
• Children’s foam sandals

4. Wire and Cable Insulation Compounding

This grade is selected for compounding into low voltage wire and data cable insulation where uniform electrical properties, flexibility, and stress cracking resistance are essential for both indoor and outdoor installation environments. The resin, combined with fire retardants, process aids, and UV stabilizers, allows extrusion into thin, defect-free insulation layers, supporting stringent dielectric and flame retardance benchmarks across international telecommunication and device harness markets.

Industry compliance standards

• IEC 60332-1-2 Flame Retardance Test
• UL 758 Standard for Appliance Wiring Material
• RoHS Directive (2011/65/EU)
• GB/T 19666-2019 Polymer Insulation Standard

Typical usage ratio

• 60–75 wt% as polymer matrix in insulation compound. Level is balanced against flame retardant and filler addition to maintain flexibility while meeting flame spread requirements.

Downstream process integration

• Pellets are melt-compounded with synergists, then supplied to downstream wire extrusion units utilizing tandem or crosshead extruder technology; fusion occurs at 120–150°C to form primary insulation, followed by in-line cooling and sparktest inspection.

Final product types

• Low voltage appliance wires
• LAN/Ethernet cable jackets
• Speaker wire sheathing
• Home appliance wire harnesses

5. Flexible Film and Sheet for Greenhouse Coverings

Producers utilize this material in co-extruded film systems to impart superior light transmission, tear resistance, and processability to multilayer agricultural films, particularly for greenhouse roofing and tunnel sheets. Its compatibility with anti-drip and UV-maximizing additives ensures stable layflat behavior under high humidity and seasonal temperature cycling, meeting the rigorous expectations of commercial horticulture operators and film converters.

Industry compliance standards

• EN 13206:2023 Plastic films for agriculture
• REACH Regulation (EC 1907/2006)
• ISO 9001:2015 Quality Management in Plastic Film Production
• EU Food Contact Plastics Regulation (where relevant for edible crops)

Typical usage ratio

• 10–35 wt% in co-extruded film blends with low-density polyethylene or metallocene PE, varying by film mechanical and optic property targets; dosage adjusts according to coalignment with UV absorber package.

Downstream process integration

• The resin enters the feed hopper in blown or cast film coextrusion lines, laminated in multilayer structures with other polyolefin grades, and is typically processed at 120–160°C through annular die heads, followed by bubble formation and winding for jumbo roll supply to greenhouses.

Final product types

• Greenhouse tunnel films
• Horticultural walk-in coverings
• Low tunnel agricultural mulch films
• Niche nursery light-diffusing covers