Applications of USI Corporation UE2803 EVA in Industrial Manufacturing

USI Corporation UE2803 EVA, an ethylene vinyl acetate copolymer, supports precision manufacturing across several key industrial segments. As the original producer, we supply specification-consistent batches to downstream processors adopting validated global standards and production methodologies.

1. Photovoltaic Encapsulant Film Production

Photovoltaic module manufacturers use this grade as a primary component for encapsulant films, which protect solar cells from moisture, mechanical, and UV stress. Manufacturers value its controlled melt flow and vinyl acetate content for lamination. Formulators adjust additives for crosslinking and UV stabilization. Our technical service team regularly supports in-line QC calibration for maximizing cell yield. Selected by module makers meeting international third-party certification for outdoor durability.

Industry compliance standards

• IEC 61215 (Crystalline silicon terrestrial PV modules)
• UL 746C (Polymeric materials for use in electrical equipment)
• TÜV Rheinland 2PfG 1162/08.2007 (Encapsulation for photovoltaic modules)
• RoHS and REACH for restricted substances

Typical usage ratio

• 55–70% of total encapsulant film mass, adjusted based on vinyl acetate content and crosslinking additives

Downstream process integration

• Blending with curing agents, adhesion promoters, and UV stabilizers during the film extrusion compounding phase
• Direct feeding into extrusion or calendering lines that laminate, crosslink, and cut films for solar panel assembly

Final product types

• PV encapsulant films (single and double glass modules)
• Solar cell backsheet films
• Flexible solar laminates and building-integrated PV panels

2. Hot Melt Adhesive Formulation

Adhesive manufacturers use USI Corporation's EVA pellet grade for hot melt adhesives supplying industries such as packaging, hygiene products, and woodworking. Polymer grade and vinyl acetate content directly influence viscosity and open time. Technologists evaluate formulation performance according to substrate porosity and application temperature, with internal QC monitoring for batch reproducibility. Collaboration with customer plants ensures compliance for both large-scale automatic and manual lines.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for food packaging — indirect food contact)
• EN 923 (Adhesives terminology and definitions)
• REACH SVHC compliance
• ISO 9001 (adopted for production management and traceability)

Typical usage ratio

• 28–60% of total adhesive formula; adjusted lower for high tack, higher for flexibility—depends on specific industrial end-use and filler/additive load

Downstream process integration

• Continuous compounding with tackifiers, waxes, and stabilizers during hot melt production
• Thermoplastic pellet feeding for drum melting lines or small-batch mixers

Final product types

• Case and carton sealing adhesives
• Diaper and hygiene product adhesives
• Edgebanding and woodworking glues
• General-purpose hot melt sticks

3. Foam Injection and Sheet Extrusion for Footwear and Sports Goods

Downstream footwear and sporting goods processors depend on this EVA resin for closed-cell foam manufacturing with chemical or physical foaming agents. The product’s specific melt index and VA ratio control the balance of elasticity, shock absorption, and compression set in finished soles, mats, or pads. Continuous mixing and foaming line monitoring ensure batch uniformity as required for OEM global brand audits.

Industry compliance standards

• ISO 20344:2021 (Footwear - Test methods for shoes and components)
• REACH compliance (Annex XVII substances of very high concern)
• GB/T 15115 (Chinese EVA Foamed Material Standard, for regional exports)
• Color fastness and heavy metal limits per customer country of destination

Typical usage ratio

• 60–95% in core compound for midsole and foam sheet production; ratio tuned for part hardness and resilience, minor portion plasticizer and crosslinker

Downstream process integration

• Dry blending with blowing agents and crosslink chemicals prior to extrusion or molding
• Feeding into direct injection or molding lines for block and sheet foaming, which is then cut or formed into components

Final product types

• Shoe midsoles and insoles
• Sports floor mats and yoga pads
• Protective packaging foam
• Flip-flop and sandal sole materials

4. Cable and Wire Insulation Compounds

Wire and cable manufacturers use this EVA base resin to formulate insulation and sheathing compounds, especially for low-voltage, flexible, or fire-resistant wire applications. Specific formulation requires careful selection of fire retardants and process oils to meet the electrical and mechanical demands in each region. Process engineers monitor granule moisture and compounding sequence to ensure optimal concentricity and flow during extrusion. Custom compounding supports local OEM requirements and regional utility certifications.

Industry compliance standards

• UL 62 (Flexible cords and cables)
• VDE 0207 (Insulating and sheathing materials for cables, Germany)
• IEC 60227/60245 (Polyvinyl chloride insulated cables and flexible cords)
• RoHS Directive 2011/65/EU

Typical usage ratio

• 40–80% of compound mass depending on flame retardant and filler loading; higher polymer content for improved elongation and flame resistance profiles

Downstream process integration

• Pellet blending with fire retardant additives, process aids, and colorants in high-intensity mixers
• Feeding into twin-screw or single-screw extruders for coating copper or aluminum wire cores

Final product types

• Flexible appliance cabling
• Low-smoke, halogen-free wire insulation
• Automotive wire harness components
• Instrumentation cables

5. Flexible Packaging Film Manufacturing

Film converters utilize this EVA grade for coextruded films, often applied as heat seal layers and food contact laminates. Our production centers provide uniform pellets attuned to machinery feed and line speed. Compounders blend the material with PE or functional tie resins, adjusting melt index and clarity against customer-requested mechanical and sealing property targets as specified by end-user certification audits. Material control ensures batch consistency for regulated packaging export flows.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymers for food packaging)
• EU 10/2011 (Plastic materials intended for food contact)
• Japan Food Sanitation Act (Positive List compliance)
• BRCGS Packaging Materials Certification

Typical usage ratio

• 5–25% in multilayer films and 15–45% in heat-seal or shrink film layers; ratio is defined by sealing temperature and clarity requirement per layer

Downstream process integration

• Gravimetric dosing with LDPE, LLDPE, and additives during coextrusion film bubble or cast line processing
• Layer application as heat-seal interface, peelable lidding, or hot-tack enhancement for processed food packs

Final product types

• Flexible bags and pouches for chilled food
• Peelable lidding films
• Hot-seal shrink wraps for beverage multipacks
• Pharma blister backing films (where regulatory permitted)