Applications of Formosa Plastics TAISOX 7350M EVA in Industrial Manufacturing

Formosa Plastics TAISOX 7350M EVA serves as a reliable ethylene-vinyl acetate copolymer for technical applications in specialized manufacturing sectors. Its consistent melt flow, flexibility, and compatibility with additives support demanding downstream integration and precision product engineering.

1. Photovoltaic Encapsulant Film Production

Solar module manufacturers use this EVA grade as the primary resin for encapsulant film formulations. The defined vinyl acetate content and precise melt flow rate facilitate lamination and cross-linking during module assembly. This material ensures adhesive performance, transparency, and stability against UV exposure, critical for photovoltaic and solar panel durability in the field.

Industry compliance standards

• IEC 61215 (Crystalline Silicon Terrestrial Photovoltaic Modules)
• UL 1703 (Standard for Flat-Plate Photovoltaic Modules and Panels)
• REACH Regulation (EC) No 1907/2006
• RoHS Directive 2011/65/EU

Typical usage ratio

• Film formulation uses 95–99% EVA by weight, adjusted for additive and crosslinker systems depending on lamination requirements.

Downstream process integration

• Compounding and extrusion to create films of 0.3–0.6 mm thickness.
• Thermo-lamination under vacuum with glass and silicon cells.
• In-line cross-linking with organic peroxide systems.

Final product types

• Photovoltaic encapsulant films
• Solar module sheets
• BIPV (Building Integrated Photovoltaic) laminates
• Flexible solar panels

2. Hot Melt Adhesive Formulation

Producers of industrial hot melt adhesives employ this EVA in their core formulation matrices, leveraging its controlled melt behavior and compatibility with tackifiers. Its performance under a range of operating temperatures sustains fast-bonding processes and product strength in packaging, woodworking, and automotive lamination lines. The low gel content supports high-speed dispensing systems and consistent bond lines.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for food contact applications)
• EN 923 (Adhesives – Terms and definitions)
• REACH Regulation (EC) No 1907/2006
• ASTM D1876 (Peel resistance for adhesive bonds)

Typical usage ratio

• Base resin comprises 30–60% of the total adhesive weight, with the proportion determined by viscosity and tackifier/resin compatibility.

Downstream process integration

• Batch blending with hydrocarbon tackifiers, waxes, and plasticizers.
• Direct extrusion or pelletizing for use in melting tanks.
• Inline adjustment for specific open times and set speeds at the end user’s site.

Final product types

• Hot melt glue sticks
• Pressure sensitive adhesive films
• Packaging case and carton sealants
• Automotive and woodworking bonding agents

3. Wire and Cable Sheath Compounds

Electrical cable compounders formulate insulation and sheath layers using 7350M grade EVA to blend flexibility with dielectric strength. Its balanced copolymer ratio meets the physical and thermal requirements for power cable jacketing, especially where lead-free and halogen-free specifications prevail. This ensures long-term protection against moisture, flame exposure, and oxidation in demanding environments.

Industry compliance standards

• UL 62 (Flexible Cords and Cables)
• IEC 60502-1 (Power Cables with Extruded Insulation)
• RoHS Directive 2011/65/EU
• EN 50363-4-1 (Insulating and Sheathing Compounds for Cables)

Typical usage ratio

• EVA resin typically makes up 35–70% of the final compound, with percentage determined by flexibility and flame retardancy requirements.

Downstream process integration

• High-intensity compounding with fire retardants, plasticizers, and UV stabilizers.
• Pelletization and feeding into cable extrusion lines.
• Cross-linking upon extrusion for heat resistance in certain cable types.

Final product types

• Low voltage and medium voltage cable sheaths
• Flexible cable insulation layers
• Data transmission cable jackets
• Halogen-free flame-retardant cables

4. Injection-Molded Footwear Components

Footwear manufacturers use 7350M EVA in injection molding on sports and casual shoe production lines. Its molecular structure yields soft, resilient foam suitable for midsoles and outsoles, offering controlled shock absorption and shape retention. Stable processability ensures consistent cell structure and surface finish across high-volume runs for global footwear brands.

Industry compliance standards

• ISO 20344:2021 (Test methods for footwear materials)
• REACH Regulation (EC) No 1907/2006 (SVHC free)
• GB 30585-2014 (China – Safety technical specification for children's footwear)
• EN ISO 21420:2020 (General safety requirements for personal protective footwear)

Typical usage ratio

• EVA base resin forms 65–95% of the foam recipe; compounding adjustments depend on the degree of expansion, pigment, and functional filler ratios.

Downstream process integration

• Batch mixing with blowing agents, pigments, and lubricants.
• Direct injection molding of midsoles, outsoles, and insole boards.
• Curing and post-molding cooling for dimensional stability.

Final product types

• Shoe midsoles and outsoles
• Insoles and comfort pads
• Protective footwear components
• Children’s EVA-based sandals and slippers

5. Flexible Foam Toys and Educational Materials

Producers of soft educational toys and gym mats formulate foamed EVA using this grade for clean, safe cell structures and tactile properties. Consistent expansion and coloration allow for vibrant, durable end products with enhanced safety for children and sports use. Controlled polymer rheology ensures uniformity in sheet and molded applications under variable mold pressures.

Industry compliance standards

• EN 71-3 (Migration of certain elements in toys)
• ASTM F963 (Standard Consumer Safety Specification for Toy Safety)
• REACH Annex XVII (Phthalates restrictions)
• CPSIA (Consumer Product Safety Improvement Act – US)

Typical usage ratio

• Formulations commonly employ 70–98% of this EVA resin, with the balance dedicated to foaming agents, colorants, and safety additives.

Downstream process integration

• Pre-mixing in sheet extrusion or injection foaming units.
• Thermal foaming and expansion with monitored cell control.
• Post-extrusion cutting, printing, or die-punching for finished shapes.

Final product types

• Foam puzzle mats
• Children’s creative toys and shapes
• Sports and yoga mats
• Classroom educational foam boards