Applications of LOTTE Chemical SEETEC VC710 EVA in Industrial Manufacturing

LOTTE Chemical SEETEC VC710 EVA is an ethylene-vinyl acetate copolymer developed to serve a range of advanced manufacturing sectors. The balance of vinyl acetate content and processability makes it suitable for high-value industrial applications. Below, we highlight established downstream segments and the specific requirements and product types associated with each sector.

1. Photovoltaic Encapsulant Film Production

Photovoltaic (PV) module manufacturers utilize this grade of EVA for encapsulant film production due to its high clarity, strong adhesion, and controlled melt flow characteristics. The polymer must support lamination with solar cells, secure electrical insulation, and endure prolonged UV and thermal exposure without yellowing or delamination. Quality control focuses on gel content and cross-linking performance, ensuring consistent and reliable output for long-term field operation.

Industry compliance standards

• IEC 61215:2016 (crystalline silicon terrestrial PV modules)
• UL 1703 (flat-plate photovoltaic modules and panels, US)
• ISO 9001:2015 (quality management applicable to PV encapsulation lines)
• RoHS Directive (2011/65/EU) for hazardous substances

Typical usage ratio

• Used at 100% as the core polymer in film extrusion, sometimes blended up to 10% with UV stabilizers and crosslink initiators based on cell configuration and customer lamination requirements

Downstream process integration

• Feeds directly to twin-screw extruders or calendering units for film formation
• Film coated with crosslink agents (e.g., peroxide) before thermal lamination with PV cells
• Finished encapsulant subjected to in-line crosslinking and vacuum lamination

Final product types

• Photovoltaic encapsulant sheets
• Solar module laminate films
• Thin-film solar panel encapsulation layers
• BIPV glass module interlayers

2. Hot Melt Adhesive Formulation

Adhesive manufacturers integrate this EVA copolymer as a primary base in industrial hot melt formulations due to its flexibility, adhesion strength, and compatibility with waxes and resin tackifiers. Typical applications require consistent melt index, precise softening points, and low odor for assembly, bookbinding, woodworking, and packaging lines demanding rapid setting and extended open times.

Industry compliance standards

• FDA 21 CFR 175.105 (US adhesives for food packaging)
• EN 923 (European adhesives terminology and test standards)
• ISO 14001:2015 (environmental management in adhesive production)
• REACH (EC 1907/2006) registration for polymers in adhesives

Typical usage ratio

• Base polymer at 35–70% by weight in hot melt blends, adjusted for desired open/setting time, cost, and end-use bonding strength

Downstream process integration

• Melt compounded with paraffin/mineral waxes, hydrocarbon or rosin-based tackifiers
• Blended in jacketed mixers and fed to extrusion, pelletizing, or direct block molding
• Quality control for viscosity, set time, and color consistency before shipment

Final product types

• Hot melt glue sticks and pellets
• Bookbinding adhesives
• Case and carton sealing adhesives
• Product assembly hot melt glues

3. Wire and Cable Insulation Compounds

Cable insulation compound manufacturers value this EVA for flexibility, dielectric properties, and its compatibility with common cross-linking systems. It plays a critical role as a non-halogenated insulation material for low-voltage power and control cables, meeting key electrical safety and flame retardancy requirements. The polymer’s vinyl acetate content influences mechanical and thermal behavior, which determines suitability for insulation extrusion and cross-linking efficacy.

Industry compliance standards

• UL 62 (Flexible cords and cables for the US market)
• IEC 60332-1 (flame propagation for insulation materials)
• RoHS Directive (restriction of hazardous substances)
• EN 50363-8 (thermoplastic insulation compounds for cables)

Typical usage ratio

• Used at 40–80% as a blend component with flame retardant fillers, processing aids, and crosslinking agents per required insulation category

Downstream process integration

• Compound mixed in Banbury or twin-screw kneaders with ATH (aluminum trihydrate) and synergists
• Feedstock processed into pellets for cable extrusion or direct extrusion coating on copper/aluminum wire strands
• Optional silane or peroxide crosslinking for enhanced heat resistance

Final product types

• Low-smoke, halogen-free wire insulation
• Flexible cords for electronics and appliances
• Power cable sheathing for indoor/outdoor use
• Control and instrumentation cable jackets

4. Footwear Foam & Shoe Sole Manufacturing

Shoe manufacturers select this EVA copolymer for injection and compression molding of lightweight, shock-absorbing foamed midsoles and outsoles. The material’s density and cell structure can be precisely controlled by adjusting formulation and foaming agents, meeting the performance requirements of sports, leisure, and occupational footwear. The consistent vinyl acetate content delivers repeatable expansion and resilience under demanding production cycles.

Industry compliance standards

• ISO 20345:2011 (safety footwear requirements)
• EN 6110 (shoes with polymeric soles test methods)
• REACH Regulation (conformance for European footwear markets)
• SATRA TM77 (heel impact resistance testing)

Typical usage ratio

• Major polymer at 60–90% by weight in foam plastisols, with 10–25% foaming/co-blowing agents and small percentages of crosslinking peroxides, pigments, or fillers based on final density and hardness

Downstream process integration

• Dry-blending with nucleating agents and crosslinkers
• Granulation prior to injection or compression mold feeding
• Foaming and molding under precise temperature-pressure profiles; post-cure for shape retention and mechanical QC

Final product types

• Foamed EVA shoe midsoles
• Sports footwear outsoles
• Beach sandal sole units
• Protective and workwear sole pads

5. Film Blown Packaging Materials

Flexible film manufacturers use this EVA grade for high-clarity, impact-resistant blown and cast films targeting specialized bags and wrapping materials. The copolymer improves toughness, seal strength, and puncture resistance. It is especially effective in shrink films, produce bags, and medical packaging, providing a customizable balance of clarity, flexibility, and process stability during blown film extrusion.

Industry compliance standards

• FDA 21 CFR 177.1350 (ethylene-vinyl acetate copolymers for food packaging, US)
• EU 10/2011 (Plastics Regulation for food contact applications)
• ISO 527 (mechanical testing for packaging films)
• ISO 11607 (packaging for terminally sterilized medical devices)

Typical usage ratio

• Base polymer at 20–100% depending on product transparency, sealing, and stiffness demands. Blended with LDPE, LLDPE, or functional additives according to final packaging design

Downstream process integration

• Direct granule feed for mono- or multi-layer blown film extrusion lines
• Co-extrusion with barrier or anti-fog resins for technical packaging
• Pigmentation and surface treatment inline for custom order fulfillment

Final product types

• Shrink films for food and logistics
• Medical pouch base layers
• Fresh produce bags
• Industrial wrap and palletizing films

6. Toys and Flexible Consumer Goods

Producers of flexible toys and molded consumer items employ this grade for its softness, resilience, and safety compliance. The formulation allows for color stability, easy demolding, and reliable mechanical properties in products aimed at infants, children, and sensitive end users. Colorants, antistatic agents, and plasticizers may be precisely adjusted to meet product performance and regulatory goals.

Industry compliance standards

• EN 71-3 (safety of toys, migration of certain elements)
• ASTM F963 (US toy safety)
• REACH SVHC (substances of very high concern)
• ISO 8124 (mechanical and physical properties of toys)

Typical usage ratio

• Used at 60–95% in soft compound bases, adjusted for softness and processing performance; additional blend with 1–2% antistatics, pigments, or plasticizers

Downstream process integration

• High-shear compounding with required colorants and additives
• Extrusion or direct injection molding into shapes, figurines, or protective goods
• Post-molding performance testing for tensile and tear resistance

Final product types

• Flexible toy parts (balls, figurines)
• Infant teething aids and bathtub toys
• Soft promotional goods
• Color-stable play mats and puzzle blocks