Applications of LOTTE Chemical SEETEC VA800 EVA in Industrial Manufacturing

LOTTE Chemical SEETEC VA800 EVA is an established copolymer raw material known for its consistent performance in specialized manufacturing domains. Below are focused application scenarios where manufacturers demand the specific processing, compliance, and end-use advantages this grade delivers in downstream sectors.

1. Photovoltaic Encapsulant Film Production

Manufacturers in the solar energy sector rely on SEETEC VA800 EVA for the production of encapsulant films that insulate and protect photovoltaic (PV) modules. Its precise vinyl acetate content ensures reliable crosslinking, balancing high transparency with strong adhesion between glass and solar cells. The formulation accommodates the stability required during extended UV exposure and field service life, contributing critically to panel durability over decades of use.

Industry compliance standards

• IEC 61215:2016 – Crystalline silicon terrestrial PV modules – Design qualification and type approval
• UL 1703 / UL 61730-2 – Flat-plate PV modules and safety qualification
• RoHS Directive 2011/65/EU – Hazardous substance restrictions
• REACH Regulation (EC) No 1907/2006 – Chemical registration and safety

Typical usage ratio

• Typically 70–85% of encapsulant film formulas by weight; ratio adjusts for required crosslink density and film flexibility as measured by acetic acid content post-curing.

Downstream process integration

• Introduced during hot-melting compounding and extrusion; downstream film lamination includes peroxide crosslinker and UV stabilizer addition prior to sheet extrusion and roll calendaring.

Final product types

• Photovoltaic module encapsulant sheets
• Backsheets for solar cell modules
• Double-glass solar panel intermediate layers

2. Hot Melt Adhesive Formulations

SEETEC VA800 EVA serves as a primary base polymer in industrial hot melt adhesive (HMA) systems designed for high-speed packaging, bookbinding, woodworking, and assembly operations. Its defined melt index and vinyl acetate content provide the necessary balance between flexibility and bonding strength, especially important for substrates like paper, plastics, or wood, where adhesion and thermal stability remain critical for downstream packaging integrity.

Industry compliance standards

• FDA 21 CFR 175.105 (US) – Adhesives for food packaging materials (where food-contact is intended)
• EU Regulation No 10/2011 – Plastics intended to come into contact with food
• ISO 9001:2015 – Quality management for adhesive production
• ASTM D1876 – Peel resistance of adhesives

Typical usage ratio

• 30–55% of adhesive mass, with adjustments for target viscosity, bond strength, open time, and softening point; resin tackifiers and waxes balance remaining composition.

Downstream process integration

• Melt-blended through heated mixing tanks; directly dosed into extruders or drum-melters where resins and additives are compounded before filling or pelletizing for downstream use in glue sticks or bulk adhesives.

Final product types

• Hot melt adhesive granules and blocks
• Glue sticks for industrial and consumer use
• Bookbinding glues
• Carton and case sealing adhesives

3. Wire & Cable Insulation Compounds

The electrical cable industry incorporates VA800 grade EVA into wire and cable sheathing compounds to deliver improved flexibility, electrical insulation, and mechanical durability. Its uniformity makes it suited for both primary insulation and compliant jacketing, meeting strict flame-retardance and dielectric property requirements for use in industrial and building wiring, control cables, and communication cables.

Industry compliance standards

• UL 62/UL 1581 – Thermoplastic-insulated wires and cables
• IEC 60245, IEC 60332 – Insulating and flame-retardant cable materials
• RoHS Directive 2011/65/EU – Heavy metals and phthalate content
• ISO 6722 – Road vehicle wiring conductors

Typical usage ratio

• 20–45% in cable compound formulations; specific rates adjusted for oil resistance, mechanical elongation, or electrical performance based on cable type and regulatory class.

Downstream process integration

• Dry-blended and pelletized with fillers, flame retardants, and plasticizers; compound introduced in extrusion lines for cable coating, followed by calibration and cooling steps for continuous cable production.

Final product types

• Flexible wire insulation compounds
• Sheathings for power and control cables
• Communication cable jackets

4. Shoe Sole Foam Compounds

Footwear manufacturers employ SEETEC VA800 EVA in midsole and outsole foam compounds to achieve the required density, rebound, and dimensional stability for sports, casual, and safety shoes. With its defined vinyl acetate level and melt viscosity, the material supports regular foaming and crosslinking cycles, enabling downstream processors to produce lightweight, cushioning soles tailored for dynamic load-bearing applications and precise footwear geometry.

Industry compliance standards

• ISO 20871 – Footwear: Quality and test methods for outsoles
• REACH Regulation (EC) No 1907/2006 – Substances of very high concern (SVHC)
• GB/T 15107-2013 – Shoe sole material test methods (China)
• OEKO-TEX Standard 100 – Harmful substance testing in textiles and shoes

Typical usage ratio

• 40–70% of total compound; dosage modulated in relation to target foam expansion ratio, hardness, and final weight of the shoe sole.

Downstream process integration

• Compound granules processed in injection molding or compression molding, with peroxide crosslink initiators and blowing agents blended prior to in-mold foaming to achieve cellular structure and shape retention.

Final product types

• EVA foamed midsoles
• Outsoles for sports, running, and lifestyle shoes
• Shoe inserts and footbeds

5. Flexible Packaging Film Manufacturing

Producers of flexible packaging films integrate VA800 to modify the seal properties, clarity, and puncture resistance of film structures for food, personal care, and medical packaging. Its melt index and vinyl acetate content facilitate reliable heat sealing on various substrates and enable downgauging without loss of tear strength, serving the needs of vertical and horizontal form-fill-seal (FFS) operations and pouch production.

Industry compliance standards

• FDA 21 CFR 177.1350 – EVA copolymers for food-contact packaging
• EU Regulation No 10/2011 – Plastics in contact with food
• ISO 11607 – Packaging for terminally sterilized medical devices
• GMP Regulation (EC) No 2023/2006 – Practices for packaging materials

Typical usage ratio

• 5–20% as a modifier or core layer in multilayer film co-extrusion; rate determined by required heat seal strength, clarity, and flexibility parameters for end-use film specifications.

Downstream process integration

• Injected via feed hoppers during multilayer blown film or cast film production, coextruded with PE, PP, or barrier resins; downstream slit, printed, and converted into rollstock or pre-made bags.

Final product types

• Food pouches and sachets
• Medical device packaging films
• Personal care product wrappers
• Resealable packaging films