Applications of LOTTE Chemical SEETEC VE700 EVA in Industrial Manufacturing

SEETEC VE700 EVA, produced by LOTTE Chemical, serves diverse downstream sectors where its specific property set—medium vinyl acetate content and controlled melt flow—matches rigorous industrial demands. Below are core application scenarios with practical detail on standards, ratios, process entry points, and resultant products.

1. Photovoltaic Encapsulant Sheet Manufacturing

Manufacturers of solar module encapsulant sheets deploy SEETEC VE700 for its superior clarity, mechanical flexibility, and adhesive strength at elevated process temperatures. The vinyl acetate content supports crosslinking with curing agents, crucial for long-term UV resistance and optical transmission. Strategic formulation yields sheets meeting the photovoltaic industry’s stringent durability and efficiency benchmarks, including interfaces with tempered glass, interconnect ribbons, and backsheet layers.

Industry compliance standards

• IEC 61215 (Crystalline silicon terrestrial PV modules – Design qualification and type approval)
• IEC 61730 (Photovoltaic modules safety qualification)
• UL 1703 / UL 61730-2 (Flat-plate photovoltaic modules and panels)
• RoHS Directive (European Parliament and Council Directive 2011/65/EU)

Typical usage ratio

• 100 parts EVA to 1–3 parts peroxide crosslinker
• 20–25 wt% VA content for clearness and flexibility
• 3–10 phr additives (UV absorbers, antioxidants) as required
• Adjust base resin and additive ratios by targeted glass transition temperature (Tg)

Downstream process integration

• Compounding and pelletizing with additives
• Extrusion into sheet, followed by lamination with cell assembly
• Thermal crosslinking under vacuum, forming final encapsulant layer on solar module stack
• Inline quality checks for gel content and optical transmission per IEC/UL standards

Final product types

• Photovoltaic encapsulant sheets (e.g., frontsheet, backsheet interlayers)
• Solar panel laminated modules (rooftop, utility scale, BIPV)
• Double-glass PV modules
• Flexible solar panels for portable applications

2. Hot Melt Adhesives (HMA) for Packaging and Assembly

Adhesive formulators rely on SEETEC VE700 for hot melt solutions, leveraging its controlled melt viscosity and tack at application temperature. Processors balance VA content and resin crystallinity for proper open time, set speed, and adhesion to packaging substrates such as paper, board, and polyolefins. SEETEC VE700 is compatible with a wide spectrum of waxes, tackifiers, and stabilizers needed to meet packaging line demands and region-specific regulatory constraints.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for indirect food contact)
• EU Regulation No 10/2011 (Plastic materials intended to contact food)
• EN 12368 (European packaging adhesives safety)
• Good Manufacturing Practices (GMP) for adhesive production

Typical usage ratio

• 25–60 wt% EVA in total adhesive compound
• 15–35 wt% tackifiers for adhesion tuning
• 5–25 wt% waxes for open time adjustment
• Level and type of each additive tailored to application line speed and substrate

Downstream process integration

• Incorporation in HMA compounding via twin-screw extrusion
• Granulation or pillow formation for logistics and application
• On-demand melting in bulk tanks at end-user site
• Hot-spray or slot die application onto cartons, cases, bottle labels, or mattress assembly

Final product types

• Case and carton sealing adhesives for food, beverage, consumer goods packaging
• Wood and furniture assembly adhesives
• Disposable hygiene product adhesives (e.g., diaper construction)
• Shoe and textile assembly HMAs

3. Wire & Cable Insulation Compounds

Compounders and converters in the wire and cable sector select SEETEC VE700 for low- and medium-voltage insulation and jacketing applications. Its acetate content enhances flexibility and dielectric performance, especially in cable constructions for consumer electronics, automotive, appliance, and communication sectors. Process stability and smooth extrusion profile enable consistent layer thickness and defect-free surface critical for downstream cable lifespan and regulatory acceptance.

Industry compliance standards

• UL 1581 (Reference standard for electric wires/cables)
• IEC 60502 (Power cables with extruded insulation)
• RoHS Directive (Restriction of hazardous substances)
• REACH SVHC compliance (EU chemical safety regulations)

Typical usage ratio

• 100 parts EVA base polymer
• 2–10 phr flame retardants (e.g., ATH)
• 10–40 phr plasticizers as needed by required flexibility
• 5–15 phr stabilizers or pigments for application-specific color and UV resistance

Downstream process integration

• Cable compound blending by melt mixing or banbury mixing
• Direct extrusion over copper or aluminum conductors
• Calibration via crosshead extrusion for uniform insulation thickness
• Surface cooling and inline electrical property testing (dielectric breakdown, volume resistivity)

Final product types

• Low-voltage and extra-low voltage building wires
• Appliance and consumer electronics cables
• Automotive primary wire insulation
• Telecom and signal transmission cables

4. Foam Shoe Sole Production

Shoe sole and sports equipment manufacturers integrate SEETEC VE700 in their EVA-blend formulations for lightweight, anti-fatigue midsoles and outsoles. Distinct cell structure engineering arises from its melt flow index and acetate functionality, supporting foaming processes with precise expansion and rebound control. Injection and compression molding operations apply this type of EVA alongside blowing agents and crosslinkers for robust, closed-cell products meeting international sportswear safety and durability expectations.

Industry compliance standards

• ISO 20345:2021 (Personal protective footwear)
• ISO 14001 (Environmental system for foam manufacturing facilities)
• REACH Safety & Restriction compliance for footwear
• California Proposition 65 (Heavy metals and phthalate restrictions)

Typical usage ratio

• 60–80 wt% EVA base material
• 10–30 wt% rubber or thermoplastic blends for wear resistance
• 1–5 phr azodicarbonamide or other blowing agents depending on target density
• 1–3 phr crosslinkers for resilience and dimensional stability

Downstream process integration

• Batch blending of EVA, rubber, blowing agent, and additives
• Pre-foaming by open mill or internal mixer
• Injection or compression molding into sole mold cavities
• Heat cure for cell formation and crosslinking, followed by trimming and surface finishing

Final product types

• Sports shoe midsoles (running, basketball, hiking)
• Lifestyle and children’s shoe outsoles
• Anti-slip sandals and clogs
• Protective and industrial safety footwear components

5. Flexible Film and Packaging Layer Manufacturing

Film producers employ SEETEC VE700 in co-extruded and blown film processes to impart flexibility, clarity, and impact resistance for lamination films, shrink wraps, and bag applications. The controlled melt flow and polymer polarity allow fine adjustment to sealing temperature and film haze on automated packaging lines. Blending with LDPE and functional additives achieves robust mechanical performance as well as regulatory acceptance for primary and secondary food contact layers.

Industry compliance standards

• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymer for food packaging)
• EU 10/2011 (Plastic materials and articles intended to come into contact with food)
• EN 1186 (Materials and articles in contact with foodstuffs – plastics)
• GMP Regulation (EC) No 2023/2006 for food contact packaging

Typical usage ratio

• 5–20 wt% EVA for heat seal and puncture resistance in multilayer films
• Up to 40 wt% EVA in shrink and stretch films requiring high elasticity
• Balance with LDPE, LLDPE, and nucleating agents based on desired gauge and flexibility
• Additive adjustment for anti-fog, slip, and migration control

Downstream process integration

• Melt blending and pelletizing with compatibilizers
• Film blowing or cast film extrusion under controlled cooling rates
• Lamination or coextrusion with polyamide or PET for barrier enhancement
• Inline surface treatment (corona, flame) for printability and sealability

Final product types

• Food packaging films (meat, cheese, bakery wraps)
• Shrink and stretch hood films for palletization
• Medical packaging liners and pouches
• Industrial bag liners and agricultural stretch wrap

6. Toy and Infant Product Molding

Producers of soft toys and baby care articles utilize SEETEC VE700 to ensure products combine dimensional stability with a pleasant tactile finish, all while meeting required phthalate-free and heavy metal safety standards. The raw material’s purity and consistent melt profile enable precise color matching and form retention during immersion molding and multi-shot injection. QA departments can verify compliance with the most up-to-date export requirements and consumer protection directives.

Industry compliance standards

• EN 71-3 (Toy safety – Migration of certain elements)
• ASTM F963 (Standard Consumer Safety Specification for Toy Safety)
• CPSIA (U.S. Consumer Product Safety Improvement Act)
• REACH Annex XVII (Phthalates, PAHs, organotin restrictions)

Typical usage ratio

• 50–90 wt% EVA as main matrix
• 10–40 wt% plasticizers or elastomers for tactile tuning
• Colorants and stabilizers under statutory migration limits
• Ingredient adjustment in accordance with product softness and geometry

Downstream process integration

• Direct pellet feeding to multi-shot or immersion molding equipment
• Color masterbatch compounding for batch consistency
• Automated demolding and surface quality checks for residue and migration
• Sampling for heavy metal and phthalate testing per export batch

Final product types

• Soft teething rings and infant soothers
• Bath toys and play mats
• Flexible toy vehicle tires
• Learning aid component parts