Applications of USI Corporation UE659 EVA in Industrial Manufacturing

As the original producer of USI Corporation UE659 EVA, we focus on reliably supporting downstream converters with tailor-made ethylene-vinyl acetate for key industries. Below we detail real-world production scenarios, segmenting each based on established applications where our material demonstrates proven functional value, and sharing precise regulatory, formulation, and process benchmarks to help B2B partners execute consistently high-quality finished goods.

1. Photovoltaic Module Encapsulation

Across solar cell production lines, our grade integrates into lamination processes as the melt adhesive film that securely seals and electrically insulates photovoltaic cells. End users in solar panel factories require this performance to meet lifetime durability and power-generation efficiency. Ensuring glass adhesion and cell encapsulation, converters select the material for its clarity, UV resistance, and controlled melt flow properties.

Industry compliance standards

• IEC 61215 (Crystalline silicon terrestrial photovoltaic modules – Design qualification and type approval)
• UL 1703 (Flat-Plate Photovoltaic Modules and Panels)
• ISO 9001:2015 (Quality Management System for manufacturing)

Typical usage ratio

• Typically 350–500 g/m² per lamination layer, with thickness and ratio tuned (18–33% EVA by mass in multilayer stacks) depending on module architecture, glass thickness, and cell type.

Downstream process integration

• Feeds as per-processed film or pellet directly into the lamination line after precise sheet cutting and vacuum pre-lamination, prior to thermal cross-linking at 145–155°C.

Final product types

• Crystalline silicon solar modules
• Thin-film PV modules
• Bifacial solar panels

2. Hot Melt Adhesives for Packaging

Converters utilize our grade for bulk hot melt adhesive formulations serving case/carton sealing and label gluing in high-throughput packaging plants. This application leverages the copolymer’s controlled viscosity, rapid set speed, and stable open time, resulting in adhesives that accommodate high-speed lines and temperature fluctuation during logistics.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives – Indirect Food Additives)
• EU Regulation (EC) No 1935/2004 (Materials intended to come into contact with food)
• ISO 22000 (Food safety management in packaging supply chain)

Typical usage ratio

• 8–25% of total hot melt adhesive formulation, depending on required tack, heat resistance, and substrate; higher ratios for flexible packaging lines, lower ratios in rigid carton systems.

Downstream process integration

• Mixes in bulk melt kettles together with tackifiers, waxes, and stabilizers before direct pumping to hot melt applicators positioned on packaging conveyors.

Final product types

• Case and carton sealing adhesives
• Pressure-sensitive labels
• Flexible food package closures
• Non-resealable shipping containers

3. Wire & Cable Compound Manufacturing

Cable compounders introduce the raw material into insulation and jacketing compounds to improve flexibility, stress crack resistance, and electrical insulation. Cable extrusion facilities demand this input for both low-voltage and signal transmission products where consistent dielectric and thermal performance are essential for long-term safety and compliance with engineering specs.

Industry compliance standards

• UL 62 (Flexible cords and cables)
• IEC 60502 (Power cables with extruded insulation and their accessories)
• RoHS Directive 2011/65/EU (Restriction of Hazardous Substances)

Typical usage ratio

• 18–35% EVA content in cable compound formulations, varying with flame retardancy needs, hardness, and thermal aging resistance. Adjusted for insulation versus outer sheath layers.

Downstream process integration

• Blends in high-intensity mixers with plasticizers, stabilizers, and fire retardants, compounded via twin-screw extrusion before feeding into cable core or sheath extrusion lines.

Final product types

• Low-voltage electrical cables
• Data transmission cables
• Automotive wire insulation
• Flexible appliance cords

4. Footwear Injection and Compression Molding

Shoe sole manufacturers value this grade for midsole and outsole blends where shock absorption, resilience, and processability are critical for comfort and wear. It enters both injection and compression molding cycles, producing light, durable, and deformation-resistant soles used throughout sports and leisure footwear.

Industry compliance standards

• ISO 9001:2015 (Quality management in footwear manufacturing)
• EN 20345 (Personal protective equipment – Safety footwear)
• REACH Regulation (EC) No 1907/2006 (Registration, Evaluation, Authorisation and Restriction of Chemicals, SVHC compliance)

Typical usage ratio

• 40–75% of total compound mass for foamed midsoles and outsoles, adjusted depending on desired hardness (Shore A) and final expansion ratio; higher EVA proportion for maximum cushion, lower if blended with natural or synthetic rubbers.

Downstream process integration

• Compounds with blowing agents and crosslinkers, granulated and fed into injection or compression molding machinery to form and cure expanded foam parts for direct attachment to shoe uppers.

Final product types

• Sports shoe midsoles
• Leisure and children’s footwear outsoles
• Protective work boot soles

5. Film Extrusion for Agricultural and Industrial Use

Film converters integrate this EVA to achieve specific optical, mechanical, and thermal properties in multilayer greenhouse films and shrink films. Its inclusion yields increased flexibility at low temperatures, fog-resistant surfaces for agricultural films, and improved sealability for industrial packaging films used in automated bagging lines.

Industry compliance standards

• EN 13206 (Plastics – Thermoplastic covering films for use in agriculture and horticulture)
• ISO 14001 (Environmental management for industrial film production)
• RoHS compliance (for films in electronics and component packaging)

Typical usage ratio

• 5–18% by mass in multilayer co-extruded films; higher ratios for cold weather flexibility or anti-fog performance; exact dosage set by agricultural environment or heat shrink requirement.

Downstream process integration

• Direct feeding as a pellet blend with LDPE/LLDPE in blown or cast film lines, dosed via gravimetric systems to ensure film width and thickness targets during continuous extrusion and winding.

Final product types

• Greenhouse and tunnel films
• Silage stretch wraps
• Shrink films for packaging
• Protective barrier films for industrial components