Applications of Formosa Plastics TAISOX 7470K EVA in Industrial Manufacturing

Formosa Plastics TAISOX 7470K EVA serves as a key raw material in multiple downstream industrial applications, integrating into core production processes to deliver finished products with precise technical properties. Our experience as the original manufacturer supports users in achieving high performance, stable formulations, and sustained compliance across demanding sectors.

1. Photovoltaic Encapsulant Film Manufacturing

TAISOX 7470K supports the production of encapsulant layers in solar photovoltaic modules where clarity, crosslinking capacity, and controlled melt flow are crucial. Customers utilize its consistent vinyl acetate content to achieve tight lamination around silicon wafers, securing long-term optical and insulation stability. Quality assurance teams frequently reference downstream module certifications, requiring consistent feedstock for reliable output.

Industry compliance standards

• IEC 61215:2016 (Crystalline silicon PV module design qualification)
• IEC 61730-1/2 (PV module safety qualification)
• UL 1703 (Safety Standard for Flat-Plate PV Modules)
• RoHS Directive (2011/65/EU) for hazardous substances

Typical usage ratio

• 65-75% as the primary resin in EVA film formulation
• Adjustments between 60% and 80% based on desired crosslink density and optical requirements

Downstream process integration

• Direct addition to extruders for cast or blown film lines
• Feeds into film lamination, subject to catalyst or peroxide mixing prior to extrusion
• Subsequent crosslinking under heat and pressure during encapsulation of cells

Final product types

• Solar panel encapsulant films (front and backsheet layers)
• Photovoltaic modules for residential and utility-scale installations
• BIPV (building-integrated photovoltaics) components
• Flexible thin-film PV modules

2. Hot Melt Adhesives in Packaging and Bookbinding

TAISOX 7470K finds widespread use as a base polymer in formulating hot melt adhesives (HMA), crucial for bonding in automated packaging lines and industrial bookbinding. The resin’s melt flow rate, tack, and thermal response support accurate machine dispensing and create strong, resilient bonds over a range of carton substrates and paper types. QC procedures in adhesive compounding ensure optimal viscosity and tack by precise adjustment of formulation ratios.

Industry compliance standards

• FDA 21 CFR 175.105 (Adhesives for indirect food contact packaging)
• REACH (Regulation (EC) No 1907/2006) for chemical content control
• ASTM D1876 (Peel resistance of adhesives)
• ISO 17025 (Testing labs for adhesive performance certifications)

Typical usage ratio

• 20-50% of the HMA base, blended with tackifiers, resins, and waxes
• Ratio increases for high flexibility and peel strength, decreases for rigid substrates

Downstream process integration

• Compounded into bulk HMA under controlled temperature with continuous mixers
• Integrated into production tanks for direct line feeding to automated applicator heads

Final product types

• Case and carton sealing adhesives
• Spine adhesives for softcover books and magazines
• Custom adhesives for high-speed packaging lines
• Label and tape adhesives

3. Cable and Wire Insulation Compound Production

Downstream manufacturers utilize this grade of EVA in compounding insulation and jacketing materials for electrical cables and communication wires. TAISOX 7470K offers an established balance of processability and dielectric strength when blended into cable compounds. By tailoring blend ratios with plasticizers and flame retardants, converter plants achieve consistency in extrusion, insulation uniformity, and fire safety performance as required in critical infrastructure and electronics.

Industry compliance standards

• UL 1581 (Reference Standard for Electrical Wires, Cables, and Flexible Cords)
• IEC 60332 (Flame Retardant Tests on Electric Cables)
• RoHS Directive for hazardous substance content
• ISO 9001 certified manufacturing for traceability

Typical usage ratio

• 35-75% of total insulation or sheathing compound by weight
• Adjustments based on cable flexibility and voltage class, with higher ratios for low voltage and data cables

Downstream process integration

• Pre-mixed with flame retardants and stabilizers before entering twin-screw compounders
• Directly extruded onto copper or aluminum cores via cable extrusion lines

Final product types

• Power cable insulation (low and medium voltage)
• Automotive primary wiring insulation
• Coaxial and fiber optic cable sheaths
• Flexible appliance wire jackets

4. Foam Injection and Sheet Production for Sports and Footwear

Sports equipment and shoe midsole manufacturers use TAISOX 7470K in their EVA-based foam compounds for lightweight, resilient cushioning. With its defined vinyl acetate content, the resin enables precise cell structure control in injection molding and continuous sheet lines. Plant-level process adjustments, such as foaming agent concentration and temperature cycle, are set according to the required rebound, density, and mechanical profile, ensuring reproducible quality for brand OEMs and international specifications.

Industry compliance standards

• OEKO-TEX Standard 100 (Harmful substance testing in textiles and plastics)
• EN ISO 20344/20345 (Safety and performance requirements for safety footwear)
• REACH (Safety of chemical content in consumer goods)
• GB/T 15107 (Chinese national standard for footwear EVA materials)

Typical usage ratio

• 65-98% of total compound, depending on flexibility and foam hardness required
• Higher ratios for cushioning insoles and mats, lower when blended with natural rubber or additives for specific hardness

Downstream process integration

• Direct batch blending with colorants and blowing agents
• Compound transfers to injection molding or continuous foaming lines
• Sheets are post-cured, die cut, and pressed to specified thickness and rebound

Final product types

• Sports shoe midsoles and insoles
• EVA foam yoga and exercise mats
• Protective helmet liners
• Custom sports gear padding and flooring tiles

5. Flexible Film Compounds for Agricultural Greenhouse Covers

Manufacturers of agricultural films select this EVA grade for compounding low-temperature, high-clarity films used in greenhouse and tunnel coverings. The resin’s high transparency and elasticity extend service life, resist cracking, and maintain light transmission in challenging outdoor conditions. Formulators optimize compounding with UV stabilizers and anti-fog additives for compliance with regional agricultural standards and macro-climate adaptability.

Industry compliance standards

• EN 13206 (Agricultural plastic films for use in agriculture and horticulture)
• ISO 9001 (Quality management during film extrusion)
• REACH (Chemical safety of additives and polymer)
• Specific national regulations for agricultural use, e.g., Chinese Greenhouse Film Quality Standard (GB/T 25480)

Typical usage ratio

• 15-40% in blended LDPE/EVA film formulations
• Adjusted for targeted flexibility, tear strength, and optic clarity according to region and crop demands

Downstream process integration

• Compounded in twin-screw extruders along with UV masterbatches and anti-fog agents prior to film blowing
• Feeds into film blowing and casting equipment for multi-layer greenhouse covers

Final product types

• Multi-season greenhouse covering films
• Low tunnel row covers for crop protection
• Anti-drip and diffused light films
• Wide plastic mulch sheets