Applications of LG Chem SEETEC EA33045 EVA in Industrial Manufacturing

LG Chem SEETEC EA33045 EVA is an ethylene-vinyl acetate copolymer used extensively in high-performance industrial sectors. Our production expertise ensures precise specification control and consistent product quality for global downstream manufacturers.

1. Solar Photovoltaic Encapsulant Sheets

EVA copolymer is the industry standard for solar panel encapsulation. We supply EA33045 in consistent pellet form to certified PV module manufacturers for use in lamination between solar cells and glass panels. Its high vinyl acetate content and carefully managed melt flow index enable strong adhesion, UV resistance, and moisture barriers required for 25+ year outdoor performance. Processing requires thermal lamination under vacuum before crosslinking.

Industry compliance standards

• IEC 61215 (Crystalline silicon terrestrial PV modules — Design qualification and type approval)
• UL 1703 (Flat-Plate Photovoltaic Modules and Panels, North America)
• RoHS Directive (European Union)
• TUV Rheinland PV Module Certification

Typical usage ratio

• Encapsulant layer: 15-22% by weight of total module, depending on cell/module design and thickness required
• Thickness adjustment between 0.40 mm and 0.60 mm, based on local UV exposure and customer specification

Downstream process integration

• Stages: Pellet feed —> Sheet extrusion —> Module layup —> Vacuum lamination (135-150°C, 10-20 min) —> Post-cure crosslinking
• Thermal process parameters strictly controlled to prevent bubble formation and optimize adhesion strength

Final product types

• Mono and polycrystalline silicon PV modules
• Thin-film photovoltaic panels
• BIPV glass modules
• Flexible solar laminates

2. Hot Melt Adhesives for Packaging and Bookbinding

EA33045 serves major producers of hot melt adhesives, especially in high-speed packaging and bookbinding operations. Its controlled melt flow facilitates rapid application and strong bonding on porous and non-porous substrates. Blend modifications attend variable loadings of tackifiers and waxes to balance open time, adhesion, and cohesive strength, tailored to end-user machinery and speed requirements.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives in food packaging, United States)
• EN 923 (European Standard – Adhesives terminology and specifications for hotmelts)
• ISO 9001:2015 (Quality Management Systems for adhesive production)
• REACH Registration (EU chemical safety)

Typical usage ratio

• Base polymer: 30-50% by total adhesive compound weight
• EVA content varies with application: 32-38% for fast-setting carton adhesives, 40-50% for spine glues in bookbinding
• Ratio adjusted based on desired open time, viscosity, and machine parameters

Downstream process integration

• Pelletized product dosed into compounding extruders with resins, waxes, pigments
• Melt-blend at 120-160°C under nitrogen blanketing to prevent degradation
• Direct transfer to hot melt tank for slot-die or roll application on automated packaging or binding lines

Final product types

• Frozen food carton adhesives
• Magazine and catalog spines
• Consumer product box sealing strips
• Corrugated box assembly adhesives

3. Wire and Cable Insulation and Jacketing

Specialized cable manufacturers use our EVA copolymer for insulation and jacketing of low-voltage and control cables. EA33045’s balance of flexibility, dielectric strength, and processability lends itself to flame-retardant cable formulations. Compounding with specific fire retardants and antioxidants produces stabilized, halogen-free cable compounds meeting telecom and industrial requirements.

Industry compliance standards

• IEC 60502-1 (Power cables with extruded insulation and their accessories)
• UL 1581 (Reference Standard for Electrical Wires, Cables, and Flexible Cords)
• Restriction of Hazardous Substances (RoHS) Directive
• ISO 6722 (Road vehicle wire — 125°C)

Typical usage ratio

• Base polymer: 45-60% of compound by weight
• Loaded with 30-40% ATH or magnesium hydroxide for flame retardancy
• Proportion fine-tuned per cable diameter and flexibility/class requirements

Downstream process integration

• Dry blending pellets with fire retardants and process aids
• Extrusion with controlled melt temperature (130–170°C)
• Direct in-line crosslinking using electron beam or silane grafting where specified
• Application by continuous extrusion over conductor or cable core

Final product types

• Control cables (industrial automation)
• Halogen-free flame-retardant wire insulation
• Telecom data cable jacketing
• Low-smoke zero-halogen (LSZH) cables

4. Footwear Foam Midsoles and Outsoles

We serve large-scale footwear OEMs and direct compounders with precise EVA resin grades for foam midsole and outsole applications. The polymer’s VA content and MFI specification support uniform cell structure and rebound resilience in injection and compression foaming. Blending with foaming agents, crosslinkers, and fillers tailors hardness, density, and weight reduction to athletic, safety, and casual shoe requirements.

Industry compliance standards

• EN ISO 20871 (Test methods for footwear outsoles – European compliance)
• SATRA TM144 (Standard for shoe sole mechanical properties)
• ISO/TS 16179 (Footwear chemical residue safety)
• California Proposition 65 (Hazardous Substance Controls, as relevant)

Typical usage ratio

• Base polymer: 50-70% of foam blend
• Physical blowing agents: 8-15%
• Crosslinking agents (e.g., DCP): 1-2%, adjusted by process and density requirement

Downstream process integration

• Dry blending of pellets, nucleating agents, and powder fillers in high-shear mixers
• Direct feed into injection or compression molding machines (mold temp 150–180°C)
• Batch foaming with rapid mold cycling for throughput consistency

Final product types

• Sports and running shoe midsoles
• Lightweight sandal footbeds
• Work boot and industrial outsole plates
• Children’s EVA shoes and clogs

5. Flexible Film for Agricultural and Industrial Use

Manufacturers of specialty films apply this EVA grade in multilayer blown or cast film processes to impart flexibility, impact resistance, and environmental stability. These films find use in greenhouse coverings, silage wraps, and non-toxic liners for industrial packaging. Controlled vinyl acetate content ensures process uniformity on high-output extruders while supporting optical clarity and mechanical durability.

Industry compliance standards

• EN 13206 (Plastic film for agricultural soil and greenhouse use)
• FDA 21 CFR 177.1350 (Ethylene-vinyl acetate copolymers for food contact)
• ISO 9001:2015 Quality Management for film manufacturing
• REACH Regulation for chemical safety

Typical usage ratio

• Base resin: 40–65% of film formulation
• Co-extrusion blends with LDPE/LLDPE or compatibilizers as 20–40% of total composition, tailored to strength/transparency needs
• Additive masterbatches (UV stabilizers, slip agents): 1–5%

Downstream process integration

• Feedstock: Pellet mixing with color and function masterbatches
• Blown film extrusion under controlled cooling
• Multilayer lamination for barrier and strength enhancement
• Reel slitting and conversion for end-user roll sizes

Final product types

• Greenhouse and tunnel films
• Silage and bale wrap films
• Flexible liners for industrial drums and containers
• Food-safe stretch films

6. Injection Molding for Sporting Goods and Toys

Direct sporting goods producers and toy OEMs use EA33045 for injection molding of flexible yet durable parts. The polymer enables fine-tuning of shock absorption and modulus for protective equipment, soft grips, and molded play surfaces. Controlled formulation with pigments and processing aids delivers safe, phthalate-free molded articles compliant with international safety standards.

Industry compliance standards

• EN 71-3 (Safety of toys — Migration of certain elements)
• ASTM F963 (US Toy Safety Standard)
• CPSIA (US Consumer Product Safety Improvement Act)
• ISO 8124 (Safety of toys — International standard)

Typical usage ratio

• Base polymer: 60–85% of molding compound
• Plasticizers and color masterbatch: 5–15%
• Impact modifiers or fillers: 3–10%, modified by desired product hardness and elasticity

Downstream process integration

• Pre-compounding in twin-screw extruders (if impact-modified)
• Direct pellet feeding into injection molding machines (barrel temp 100–170°C)
• Mold temperature adjusted based on part wall thickness and release requirements

Final product types

• Protective sports gear (shin guards, helmets linings)
• Soft toy figures and blocks
• Grips and handles for sports and fitness equipment
• Flexible outdoor play structures