Applications of LG Chem SEETEC EA40055 EVA in Industrial Manufacturing

SEETEC EA40055 Ethylene Vinyl Acetate (EVA) resin from LG Chem finds targeted industrial applications where its copolymer structure, flexible melt flow, and transparency provide processing and end-use advantages. This section details primary use cases across multiple industrial segments where this grade delivers critical performance, compliance, and process value.

1. Photovoltaic Encapsulant Films

Manufacturers formulate encapsulant films for solar module lamination using SEETEC EA40055 for superior adhesion, transparency, and encapsulation properties. Processing requires precise control of crosslinking and melt viscosity, impacting the film’s durability and electrical insulation. QA teams monitor gel content, water absorption, and optical clarity to comply with solar module standards.

Industry compliance standards

• IEC 61215 – Terrestrial photovoltaic (PV) modules
• UL 1703 – Safety standard for flat-plate PV modules
• TUV IEC 61730 – Safety qualification testing for PV modules
• RoHS, REACH regulatory requirements for module materials

Typical usage ratio

• 85–100% of encapsulant film formulation, with crosslinking agents (0.3–1 wt%) and UV stabilizers added per film design and expected module lifespan

Downstream process integration

• Film extrusion lines feed SEETEC EA40055 pellets as a base resin; after blending and pellet drying, hot melt extrusion forms sheets of 0.3–0.5 mm thickness for lamination between cell and glass layers in module assembly lines

Final product types

• Photovoltaic module encapsulant sheets (EVA film rolls, pre-cut sheets)
• Backsheet bonding layers
• BIPV (building-integrated PV) laminate films
• Flexible solar cell packaging films

2. Hot Melt Adhesives for Packaging

SEETEC EA40055 provides key performance in formulating hot melt adhesives. Packaging industry leaders blend this grade for tack, flexibility, and bonding performance on coated boards and difficult substrates. The high VA content ensures compatibility with waxed and printed boxes, with strict QC over odor, VOCs, and migration for food contact packaging.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives, indirect food contact)
• EU Regulation 10/2011 (Plastic materials in food packaging adhesives)
• ISO 22000 – Food safety management for packaging
• ASTM D1974 – Test for closure adhesives

Typical usage ratio

• 30–70% of total adhesive mass, adjusted for open time, set time, viscosity, and required flexibility in end-use

Downstream process integration

• Reactors or single-screw extruders use SEETEC EA40055 as a primary feed; resin is blended with tackifiers, waxes, and stabilizers, then pelletized or directly dispensed as block adhesives

Final product types

• Hot melt adhesives for case and carton sealing
• Spine glues for bookbinding
• Label stock adhesives
• Corrugated box bonding adhesives

3. Wire and Cable Insulation Compounds

EVA copolymers, including SEETEC EA40055, deliver electrical insulation, flexibility, and long-term aging resistance. Compounders blend it with flame retardants for low-voltage and control cables. The balance of processability and physical properties supports high throughput cable extrusion. Compliance and record-keeping focus on electrical tests and halogen content.

Industry compliance standards

• IEC 60502 – Extruded insulation cables rated up to 1 kV
• UL 1581 – Electrical wires, cables, and flexible cords
• RoHS Directive (2011/65/EU) for halogen-free cable jackets
• CSA C22.2 No. 49 – Flexible cords and cables

Typical usage ratio

• 60–90% of insulation compound, modified by filler (calcium carbonate, ATH), plasticizer, and FR additive content

Downstream process integration

• SEETEC EA40055 is dry-blended and melt compounded with fire retardants and fillers; screw extruders coat the conductor; in-line QC covers dielectric strength and surface smoothness

Final product types

• Low-voltage power cables
• Appliance wiring insulation
• Flexible cable sheathings
• Zero-halogen flame retardant insulation compounds

4. Foamed Shoe Soles and Footwear Components

Footwear OEMs select this EVA grade for closed-cell and injection-molded foam soles where high flexibility, cushioning, and light weight drive consumer comfort. On-line expansion rates and density must be consistent for brand specifications, and additive selection meets country of sale’s product safety mandates.

Industry compliance standards

• REACH Annex XVII (Restricted substances for footwear)
• GB 30585-2014 (China, hazardous substances in footwear)
• EN ISO 20344:2021 (Footwear test methods)
• CPSIA (Consumer Product Safety Improvement Act, US)

Typical usage ratio

• 65–95% of foam blend, varying with target density, rebound, and cell structure; blowing agents usually 3–8%; pigment and processing aids as needed for color and mold release

Downstream process integration

• Batch mixers or extrusion foam lines process resin with blowing agents and modifiers, followed by injection or compression molding of midsole/outsole components; density, resilience, and appearance undergo in-line checks

Final product types

• Lightweight EVA midsoles for athletic, casual, and safety footwear
• Shower sandals, flip-flops, molded slippers
• Footbeds and comfort insole inserts
• Shock-absorbing platform shoes

5. Flexible Film and Packaging (Non-food)

Industrial film extruders incorporate SEETEC EA40055 to impart sealability, toughness, and elongation in non-food flexible packaging. The formulation supports embossed films, carrier bags, and lamination bases with controlled gloss and mechanical strength, meeting end-user and logistics safety audits.

Industry compliance standards

• ISO 527-3 (Tensile properties of films and sheeting)
• EN 13432 (Compostability, when blended with biodegradable additives)
• EN 12301 – Test for heat sealability
• REACH SVHC compliance

Typical usage ratio

• 5–50% in film blends, adjusted with LDPE or LLDPE for target film thickness, tear strength, and sealing temperature profile

Downstream process integration

• Blown film or cast film extrusion systems use the resin as one or more layers within coextruded film structures, with additive masterbatch dosed online for slip, anti-block, or antistatic function

Final product types

• Industrial sacks and liner bags
• Protective overwrap and stretch hood films
• Non-food carrier bags
• Lamination substrates for industrial pouches

6. Toys and Sports Equipment Molding

Producers of toys and recreational gear rely on SEA40055 for safe, resilient plastic parts. Injection and blow-molded components use this resin for cushioning, colorability, and tough impact resistance. Compliance teams monitor formulations for phthalate, lead, and PAH content as required by global toy safety directives.

Industry compliance standards

• EN 71-3 (Migration of heavy metals in toys)
• ASTM F963 (Standard Consumer Safety Specification for Toy Safety)
• SOR/2011-17 (Canadian Hazardous Products, Toys)
• Phthalate-free requirements per customer and market

Typical usage ratio

• 60–100% of finished part composition; addition of color or foaming agents to modify tactile feel and appearance according to the application

Downstream process integration

• Material is fed via hopper dryers to injection molding or blow-molding machines; cycles monitored for sink marks, flow, and demolding behavior as prescribed by product specification

Final product types

• Soft toy bodies and doll parts
• Protective sports gear (e.g., shin guards, helmet liners)
• Toy construction blocks
• Floating pool toys