Applications of USI Corporation Evathene UE655 EVA in Industrial Manufacturing

Evathene UE655 EVA, produced by USI Corporation, is formulated for demanding industrial uses requiring high clarity, flexibility, and adhesion properties. Our manufacturing insight ensures reliable integration into various downstream sectors, supporting compliance, processing efficiency, and finished product performance through every stage of production.

1. Hot Melt Adhesives for Packaging and Bookbinding

Formulators incorporate Evathene UE655 into hot melt adhesive systems to achieve rapid setting and strong bonding for automated packaging lines and bookbinding operations with high output rates. Its vinyl acetate content and melt flow properties support adhesion to paper, board, and treated films while maintaining flow stability during continuous processing. Reliable performance under fluctuating temperatures and excellent thermal stability benefit converters under high-speed machine cycles.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for indirect food contact)
• REACH (EC) No 1907/2006 compliance
• ISO 9001:2015 Quality Management Systems
• RoHS Directive 2011/65/EU (as applies to packaging adhesives in electronics and toys)

Typical usage ratio

• 15–40% by total hot melt formulation, varying by required open time and substrate absorptivity; lower ratios for fast tack, higher for increased flexibility or peel strength.

Downstream process integration

• Pre-blended and melted with tackifiers, waxes, and antioxidants in high-shear, temperature-controlled mixers before direct extrusion or slot die coating onto packaging substrates or book spines.

Final product types

• Carton and case sealing adhesives
• Bookbinding glues (perfect binding and spine adhesives)
• General purpose hot melt sticks

2. Film Casting for Agricultural Greenhouse and Packaging Films

Processors utilize Evathene UE655 in multilayer blown or cast film lines to impart tear resistance, puncture durability, and high optical transparency to films used in greenhouses, tunnel covers, and specialty food packaging. Stable melt viscosity and low gel content allow tight thickness tolerance and minimal die drool over prolonged runs. Its chemistry supports good seal initiation and peel properties even for modified atmosphere packaging films requiring high integrity under stress.

Industry compliance standards

• EN 13206:2023 (Greenhouse plastic films)
• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymers for food packaging)
• GB 9685-2016 (Chinese Hygienic Standards for Use of Additives in Food Containers and Packaging Materials)
• ISO 14001 (for environmental controls in film production)

Typical usage ratio

• 5–18% in multilayer film blends, with proportion adjusted to balance impact resistance and sealing performance; higher loads in inner sealant layers, lower loads for outer weatherable tech layers.

Downstream process integration

• Direct compounding with LLDPE, LDPE, and slip/anti-fog masterbatches in gravimetric feeders, followed by extrusion through annular or slot dies onto cooling towers or chill rolls for film formation.

Final product types

• Greenhouse films and tunnel covers
• Vacuum-sealable food packaging bags
• Flexible pouch and lidding films

3. Wire & Cable Insulation Compounds

Insulation compound producers use Evathene UE655 as a primary polymer for low voltage and signal cable sheathing, thanks to its flexibility, dielectric strength, and process uniformity. Balanced flow under controlled kneading enables consistent dispersion of fillers and flame retardants, while its resistance to deformation under thermal cycling ensures dimensional stability during cable extrusion and curing lines.

Industry compliance standards

• UL 62, UL 1581 (for wire and cable safety and insulation chemistry)
• RoHS Directive 2011/65/EU (Lead, Cadmium, and phthalate restrictions in electrical insulation)
• IEC 60332, IEC 60811 (Flame retardancy and physical testing for insulation compounds)
• GB/T 2951 series (China electrical cable insulation specification)

Typical usage ratio

• 18–35% EVA in total compound, depending on required flexibility, elongation at break, and fire resistance; formulation tailored for either soft jacket or filler layers within multi-core systems.

Downstream process integration

• Continuous compounding with plasticizers, stabilizers, and inorganic fillers; pelletization via underwater or strand cutting before feeding into single or twin-screw extruders for coating around conductors.

Final product types

• Low-voltage power cable jackets
• Instrument and telecom wire insulation
• Flexible appliance cords

4. Footwear Injection Molding (Shoe Sole Compounds)

Shoe sole compounders select Evathene UE655 for light, shock-absorbing midsoles and outsoles, prioritizing foam cell uniformity, flexibility under repeated compression, and resistance to stress cracking. Fine-tuning of gas injection or chemical blowing parameters during injection or compression molding is supported by the resin’s melt strength, ensuring low weight without collapse while enabling vibrant color masterbatch compatibility under full scale production speeds.

Industry compliance standards

• ISO 20344:2021 (Personal protective footwear physical and mechanical tests)
• EN 13632 (Standard for footwear chemical safety requirements)
• REACH Annex XVII (Phthalate-free and restricted substances in footwear)
• GB/T 15107-2013 (China standard for sports shoe soles)

Typical usage ratio

• 60–95% of the sole compound, lowered for extreme cold flexibility adjustments; additives, foaming agents, and pigment masterbatches make up the remaining content depending on intended elasticity and color.

Downstream process integration

• Direct mixing with physical/chemical blowing agents and colorants, then transfer to either injection or compression molding machines for expansion, forming, and cooling in sole-shaped molds; recycling of flash and offcuts integrated at the pelletizing stage.

Final product types

• Sports shoe midsoles (running, training, basketball)
• Beach and leisure sandal outsoles
• Children’s shoe soles and footbed foams

5. Solar Module Encapsulants

Solar encapsulant sheet converters rely on Evathene UE655 for consistent crosslinking and high light transmittance in photovoltaic module lamination. Its controlled vinyl acetate content supports low shrinkage and compatibility with curing additives, minimizing bubble formation and maintaining adhesion under continuous UV and thermal aging. Downstream integrators benefit from excellent lamination speed and low wrap defects during vacuum and sunlight exposure simulations.

Industry compliance standards

• IEC 61215 (Crystalline silicone PV module requirements)
• UL 1703 (Flat-plate photovoltaic module safety)
• TÜV Rheinland 2PfG 1162/10.2007 (Solar module laminating sheets)
• ISO 9001:2015 (Production quality of encapsulant film)

Typical usage ratio

• 100% EVA for encapsulation layer, adjusted with crosslinking initiators (0.5–2%) and UV absorbers in the sheet; thickness typically 0.45–0.6mm tailored to module design.

Downstream process integration

• Extrusion of EVA pellet into sheets, followed by lamination with glass and PV cells under vacuum and controlled thermal profile to induce crosslinking; post-lamination aging and cut-to-size prior to frame assembly.

Final product types

• Solar PV module encapsulant films
• Photovoltaic backsheet adhesives (in multi-layer sandwich sheets)
• Building-integrated PV panel lamination layers