Applications of Levima UL00318 EVA in Industrial Manufacturing

Levima UL00318 EVA is a widely adopted ethylene-vinyl acetate copolymer in specialized industrial manufacturing processes. Its tailored properties support multiple downstream applications where formulation reliability, process integration, and regulatory compliance are critical for downstream product performance and certification. Below are key industrial segments utilizing Levima UL00318 EVA with detailed application specifics.

1. Photovoltaic Encapsulant Film Production

In the solar module industry, manufacturers use this EVA copolymer as a core component in sheet extrusion for encapsulation films. The material ensures strong adhesion between glass and silicon cells after lamination, providing electrical insulation and weatherability under long-term exposure. Processing parameters include precise temperature control during sheet extrusion and vacuum lamination to deliver high optical transmittance and crosslinking rates that meet module longevity criteria.

Industry compliance standards

• IEC 61215: Terrestrial photovoltaic (PV) modules – Design qualification and type approval
• IEC 61730: PV module safety qualification
• UL 1703: Standard for flat-plate PV modules and panels
• RoHS Directive (2011/65/EU) for substance restrictions

Typical usage ratio

• 65–80% (by weight) in encapsulant sheet formulation; ratio adjusted per crosslinking additives and film thickness

Downstream process integration

• Introduced at the compounding stage for pellet blending
• Melt-extruded into sheets (0.3–0.6mm)
• Laminated under vacuum and heat between glass and cell arrays
• Crosslinking initiated during lamination to achieve target gel content (>75%)

Final product types

• Thermally crosslinked EVA solar module encapsulant films
• Double-glass PV panels
• Flexible and rigid module structures for utility and rooftop solar
• BIPV (building-integrated photovoltaics) panels

2. Hot Melt Adhesive Formulations

Adhesive manufacturers integrate this EVA material as a primary polymer base in pressure-sensitive and hot melt glue products. The copolymer’s melt flow properties and compatibility with tackifiers allow precise formulation for open time, bond strength, and viscosity. Controlled compounding supports requirements for food packaging adhesives, carton sealing, and woodworking, with end users requiring assured batch consistency for automated application equipment.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for food packaging)
• REACH Regulation (EC) No 1907/2006 (chemical safety)
• ISO 9001:2015 (Quality management for adhesive manufacturing)
• GB 19392-2003 (Hot melt adhesive standards for food contact)

Typical usage ratio

• 20–45% (by weight) in total adhesive blend; tailored by tackifier and plasticizer content, based on required adhesion profile

Downstream process integration

• Fed into high-shear compounders and reactors with tackifiers, waxes, and plasticizers
• Extrusion and granulation to form pellets, sticks, or films
• Converted to hot melt sticks, pillows, or PSA tapes via cutting or die-forming

Final product types

• Hot melt glue sticks for industrial dispensers
• Pressure-sensitive adhesive tapes and labels
• Carton and case sealing adhesives
• Bookbinding adhesives

3. Wire and Cable Insulation Compounds

Cable and wire compounders employ EVA copolymer in low-voltage insulation and jacketing compounds. Its electrical insulating properties and stress crack resistance support both extrusion and co-extrusion with polyolefin blends, where uniform melt characteristics minimize conductor voids. Additive and fire retardant compatibility ensures formulations achieve certification for power, data, and automotive wiring harnesses.

Industry compliance standards

• IEC 60228: Conductors of insulated cables
• UL 1581: Reference standard for electrical wires, cables, and flexible cords
• RoHS compliant for hazardous substances
• EN 50363-2-2: EVA insulation compound for low-voltage cable

Typical usage ratio

• Up to 60% (by weight) of insulation compound; exact dosage varies with flame retardant and compatibilizer levels

Downstream process integration

• Dry blended with stabilizers, colorants, and fillers
• Compound extruded onto copper/aluminum wire cores for primary insulation
• May be co-extruded with LDPE or LLDPE outer jackets
• Cooled and cut to spec for wire and cable spools

Final product types

• Low-voltage building wire insulation
• Telecom and signal cable sheathing
• Automotive wiring harness insulation
• Flexible power cords

4. Injection-Molded Shoe Sole Manufacturing

Footwear producers use the copolymer in injection molding of EVA foamed and solid sole units for sports and casual shoes. Benefits include lightweight cushioning, high rebound, and tailored hardness. By optimizing expansion agents, crosslinkers, and blowing processes, manufacturers tune microcellular structure, density, and resilience to meet footwear performance and regulatory slip-resistance requirements.

Industry compliance standards

• EN ISO 20344: Personal protective equipment – Test methods for footwear
• GB/T 15107: General technical requirements for shoes
• REACH SVHC compliance for consumer products
• ISO 9001:2015 quality management for footwear production

Typical usage ratio

• 40–75% (by weight) in sole compound; content varies with loading of fillers (e.g., CaCO₃), blowing agents, and crosslinkers required for target density and hardness

Downstream process integration

• Batch mixed with blowing agents and crosslinkers
• Fed into injection or compression molding machines
• Foamed and cured in heated molds to achieve cell structure
• Trimmed and finished as outsole, midsole, or insole components

Final product types

• Sports shoe midsoles and insoles
• Casual shoe lightweight outsoles
• Beach and shower sandals
• Safety shoe anti-slip sole units

5. Flexible Packaging Film Extrusion

Film converters utilize the EVA copolymer for producing multilayer flexible packaging, including food contact and medical-grade films. The resin’s adhesion to diverse substrates, combined with clarity and sealability, delivers barrier films suitable for sensitive contents. Control of process parameters during extrusion and coextrusion is essential to achieve required puncture resistance, weld strength, and compliance for hygiene-critical applications.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymer for food contact)
• EU Regulation No 10/2011 (Plastics for food contact)
• ISO 11607-1: Packaging for terminally sterilized medical devices
• EN 15593: Hygiene management for packaging manufacturing

Typical usage ratio

• 10–35% (by weight) in coextruded multilayer structures; content adapted by desired flexibility, oxygen barrier properties, and film gauge

Downstream process integration

• Dry blended with LLDPE, LDPE, and barrier resins
• Extruded into mono- or multilayer blown or cast films
• Laminated or surface-treated for printability and adhesion
• Cut and converted into pouches, bags, or medical device wraps

Final product types

• Vacuum pouch films for fresh food
• Medical device sterile barrier films
• Lidding films for trays, cups, and blister packs
• Shaped sachets for condiments and pharmaceuticals

6. Foamed Sheet Production for Sports and Leisure Goods

Manufacturers of sports mats, flotation devices, and protective gear employ this copolymer for lightweight, shock-absorbing foamed sheet materials. Careful batch compounding with blowing and crosslinking agents creates consistent closed-cell structures. Post-extrusion crosslinking and precision die-cutting meet dimensional, recovery, and safety requirements for recreational, educational, and aquatic end uses.

Industry compliance standards

• EN 71-3: Safety of toys – Migration of certain elements
• ASTM F963: Standard Consumer Safety Specification for Toy Safety
• REACH Annex XVII (restricted substances for consumers)
• ISO 9001:2015 (Quality assurance for sports goods)

Typical usage ratio

• 50–90% (by weight) in foamed formulations; loading levels depend on target foam density, cushion, and recovery profile

Downstream process integration

• Compounded with crosslinkers, blowing agents, color masterbatch
• Extruded to sheet thickness 2–40mm and foamed by heat expansion
• Crosslinked via batch heating or irradiation
• Cut, laminated, or die-formed to final dimension

Final product types

• Exercise and yoga mats
• Swimming kickboards and floating toys
• Protective floor tiles and sports gear padding
• Children’s play mats and puzzle mats