Applications of LOTTE Chemical SEETEC VA810 EVA in Industrial Manufacturing

SEETEC VA810 EVA from LOTTE Chemical delivers performance for demanding industrial downstream sectors. We continuously collaborate with high-volume converters and OEMs to address real end-use challenges through focused applications. Below are strictly validated, sector-specific uses based on proven customer practice and regulatory context.

1. Solar Photovoltaic Encapsulant Films

Manufacturers of photovoltaic modules depend on reliable encapsulant film resins. SEETEC VA810 EVA ensures high transmittance, crosslinking, and low shrinkage, critical for module durability and electrical output. Its vinyl acetate content and flow characteristics optimize lamination cycles and long-term adhesion to glass and backsheet without compromising PID resistance or weatherability. Encapsulant producers control peroxide and additive systems to meet Tier 1 solar panel OEMs’ requirements for electrical insulation and module efficiency retention beyond 25 years.

Industry compliance standards

• IEC 61215 for module qualification
• UL 1703/UL 61730 for safety certification
• RoHS Directive (EU) 2011/65/EU
• REACH regulation (EC) No 1907/2006

Typical usage ratio

• 95–100% EVA resin in film composition; crosslinking additives at 1–3%
• Adjust ratios to module structure and thickness (0.4–0.6 mm per sheet)

Downstream process integration

• Direct film extrusion—chill roll or T-die casting
• Sheet calendaring and masterbatch feeding
• Online lamination onto glass and cells; crosslinking in vacuum laminator at 140–150°C
• Laser edge cutting and module framing

Final product types

• Monocrystalline and polycrystalline solar panels
• Bifacial and transparent PV modules
• Thin-film and building-integrated PV (BIPV) laminates
• Flexible and portable solar panels

2. Hot Melt Adhesive Formulation

Industrial glue manufacturers adopt VA810 EVA in hot melt adhesive production for hygiene, packaging, woodworking, and automotive assembly. Its specific VA content supports a precise balance between tack, softness, and cohesive strength. Compounders blend it with waxes, tackifiers, and antioxidants based on temperature resistance, open time, and substrate compatibility. Processors achieve low viscosity for spray or slot-coat application, and rapid set speed meets high-speed automated lines without compromising bond durability or chemical resistance on difficult substrates.

Industry compliance standards

• FDA 21 CFR 175.105 (for indirect food contact, food packaging adhesives)
• ISO 9001:2015 for quality management
• EN 923 (Adhesives – Terms and definitions)
• LGA Hygiene and Toxicology certifications for hygiene applications (e.g., diapers)

Typical usage ratio

• 30–50% EVA resin as polymer backbone
• Remainder: tackifier resins (30–55%), waxes (10–25%), stabilizers
• Adjusted for viscosity, open time, and peel strength targets

Downstream process integration

• High-shear batch mixing at 150–180°C
• Pellet compounding and extrusion
• Melt tank or drum feed into curtain, spray, or bead coating stations
• Packaging in pillow, block, or stick formats

Final product types

• Case and carton sealing hot melts
• Disposable hygiene product adhesives (e.g., diaper, feminine care)
• Bookbinding and woodworking adhesives
• Automotive interior assembly glues

3. Cable Compound and Wire Insulation

Wire and cable compounders value SEETEC VA810 for low-temperature flexibility, electrical resistance, and stress-crack resistance in insulation and jacketing. The VA content moderates hardness to minimize cracking, even under bending or outdoor exposure. Compounding with functional additives such as flame retardants, mineral fillers, and UV stabilizers ensures that end products pass rigorous electrical and weathering tests. Material processes through twin-screw extruders for insulation layer coherence and is compatible with copper or aluminum wires for both energy and communication cables.

Industry compliance standards

• UL 62 and UL 1581 for electrical wire
• IEC 60502 and IEC 60332 for flame retardant and low smoke cables
• RoHS 2011/65/EU for hazardous substances
• CEA/JIS C 3005 for heat aging and flexibility

Typical usage ratio

• 40–75% EVA as primary compound resin
• Additives: flame retardants (20–50%), plasticizers and fillers as needed
• Ratios tuned based on voltage class and flexibility rating

Downstream process integration

• High-intensity melt mixing with additives
• Pelletizing for compound storage and feeding
• Continuous extrusion over conductor cores
• Online cable inspection and spark testing

Final product types

• Low voltage and medium voltage power cables
• Data and signal transmission cable sheaths
• Fire-resistant and halogen-free cables
• Flexible appliance and automotive wires

4. Foam Production for Footwear and Sports Goods

Footwear and sporting goods outsole manufacturers integrate VA810 EVA for producing closed-cell and crosslinked foams. The material enables controlled expansion, uniform pore size, and cushioning properties. Detailed process control throughout blending, foaming agents, and crosslinking additives ensures targeted rebound, density, and hardness levels. Producers balance formulating ratios for odor, slip resistance, and dimension stability as demanded by global OEM footwear brands and sporting goods standards.

Industry compliance standards

• ISO 20344 for personal protective footwear testing
• REACH Annex XVII for restricted substances
• EN 71-3 for toy safety (sports accessories)
• CPSIA (US) limits for children’s accessories

Typical usage ratio

• 60–90% EVA in foaming compound
• Azodicarbonamide or other blowing agents (1–3%) and crosslinkers (1–2%)
• Fillers, pigments, odor-masking agents as per end-customer requirements

Downstream process integration

• Banbury or internal mixer blending
• Compression or injection foaming at 160–180°C
• Post-cure for crosslinking and dimensional stability
• CNC die-cutting or molding into outsole and midsole shapes

Final product types

• Sports shoe midsoles and outsoles
• Slippers, sandals, comfort insoles
• Shock-absorbing sports mats
• Protective gear padding

5. Film and Sheet for Packaging and Greenhouse Coverings

Plastic film converters select VA810 EVA for specialized industrial, agricultural, and flexible packaging films requiring high clarity, puncture resistance, and low-temperature flexibility. Its measurable VA content facilitates coextrusion with PE or metallocene polymers, improving tear resistance and droplet formation control on greenhouse covers. Precision melt control and gauge feedback during extrusion maintain film quality for demanding food and agricultural applications, ensuring compliance with food safety and environmental exposure limits.

Industry compliance standards

• FDA 21 CFR 177.1350 (food contact film)
• EN 1186 for food packaging migration limits
• ISO 6272 for impact resistance (agricultural films)
• EU 10/2011 for plastics in food contact

Typical usage ratio

• 10–40% EVA in blown film or cast film blends with PE
• Adjusted for gauge, anti-fog, and optical performance targets

Downstream process integration

• Automated blending and gravimetric feeding at extruder
• Blown film or flat-die (cast) coextrusion
• In-line thickness and clarity monitoring
• Slitting, printing, and packaging for roll stock or flat sheets

Final product types

• Food wrap and shrink films
• Stretch hood and pallet wrapping films
• Greenhouse and low tunnel agricultural covers
• Easy-peel lidding films

6. Injection and Blow Molding for Toys and Consumer Goods

Toys, stationery, and soft consumer goods producers rely on VA810 EVA to create flexible, impact-resistant components that meet safety and tactile requirements. Custom molding compounds incorporating the resin present controllable hardness and elasticity to facilitate safe, child-friendly parts without phthalates. Direct compounding and coloring enable rapid changeover for multi-product facilities. Manufacturers monitor molding cycle, cooling time, and demolding pressure closely, especially for toys and items intended for children, where certification tests are mandatory.

Industry compliance standards

• EN 71-3 for elemental toy safety
• ASTM F963 for US toy safety
• CPSIA Section 108 for phthalate limits
• ISO 8124-1 for mechanical and physical properties

Typical usage ratio

• 50–100% EVA in molding compound depending on flexibility requirements
• Color masterbatches, nucleating agents, and impact modifiers as needed

Downstream process integration

• Precision pellet mixing and drying
• Injection or blow molding at 150–190°C
• Color dosing and in-line part marking
• Batch QC for safety and surface finishing before packaging

Final product types

• Soft toy parts and doll accessories
• Stationery grips, erasers, and pencil toppers
• Household utility goods and soft handles
• Protective covers and stress-relief consumer products