Dow-Mitsui EVA EVAFLEX V421

EVAFLEX V421 is a high-performance ethylene-vinyl acetate (EVA) copolymer resin manufactured by Dow-Mitsui Polychemicals Co., Ltd. Synthesized with a relatively high vinyl acetate (VA) content, this grade is molecularly engineered to offer an optimal balance of structural flexibility, low-temperature resilience, and robust substrate adhesion. Unlike rigid polymers, its chain configuration yields a inherently soft material that retains functional ductility without requiring external, volatile plasticizers.

Industrial engineers select this natural-colored resin for its clean extrusion kinetics, thermal processability, and compatibility with diverse compounding formulations. The material behaves as a highly efficient bonding and modification agent, making it a staple raw material across technical molding, multi-layer film production, and hot-melt compound operations. Its structural architecture performs exceptionally well in demanding conditions that require long-term weather resistance, environmental durability, and impact dampening.

Technical Specifications

Physical Properties

• Vinyl Acetate Content: 28 wt% (Tested via JIS K7192). This substantial VA loading is the core structural driver for the polymer’s high elasticity, optical clarity, and excellent polar adhesion characteristics, though it reduces overall crystalline stiffness compared to low-VA alternatives.
• Melt Flow Rate (MFR): 4 g/10 min (Tested via JIS K7210). An intermediate flow index ensures a balanced rheology, offering stable melt strength for continuous film extrusion alongside smooth cavity filling on injection molding equipment.
• Density: 950 kg/m³ (Tested via JIS K7112). This specific material density indicates a reduction in peak ethylene crystallinity, resulting in a flexible, low-stress solid matrix.

Mechanical Properties

• Tensile Strength: 25 MPa (Tested via JIS K7161). The polymer maintains robust ultimate tensile limits, protecting thin-walled extrusions or structural coatings from tearing under sudden mechanical loads.
• Ultimate Elongation: 800% (Tested via JIS K7161). Exceptional high-stretch mechanics ensure extreme ductility, allowing industrial parts to deform significantly and recover without experiencing structural cracking.
• Stiffness: 15 MPa (Tested via JIS K7106). A low stiffness value confirms the material’s structural softness, facilitating easy bending, winding, and unspooling of technical profiles.
• Hardness: 82 Shore A (Tested via JIS K7215). This surface hardness provides a resilient, rubber-like texture that resists minor surface abrasions while maintaining a high coefficient of friction.

Thermal Properties

• Melting Point: 73°C (Tested via JIS K7121). A low crystalline melting point allows for energy-efficient, low-temperature industrial blending and fast cycles on secondary forming machinery.
• Vicat Softening Point: 42°C (Tested via JIS K7106). The material responds rapidly to radiant thermal profiles, marking it as highly reactive during secondary heat sealing or automated thermoforming procedures.

Applications

High-Adhesion Hot-Melt Formulations and Industrial Blending

The 28 wt% vinyl acetate composition makes this resin an excellent tackifying foundation for technical hot-melt adhesive compounds. Its unique polarity allows it to bond securely with non-porous paper stocks, polymers, and metallic laminates. Processing plants use this base resin to compound reliable adhesive systems that resist brittleness when stored in sub-zero industrial cold chains.

Co-Extruded Technical Films and Solar-Panel Encapsulation

Converters use this grade on continuous film lines to produce highly transparent, impact-absorbing flexible layers. Its excellent optical clarity and inherent UV weathering resilience support its use in multi-layer protective packaging and solar-panel encapsulation sheets. The material encapsulates sensitive electronic circuits cleanly, shielding them from ambient humidity and structural impact.

Flexible Molding, Footwear Components, and Wire Compounding

Manufacturers use this copolymer to produce flexible consumer footwear soles, soft-touch industrial gaskets, and wire jacket insulation compounds. Its low-temperature ductility prevents molded components from splitting or cracking in extreme winter environments, while its compatibility with mineral flame retardants supports high filler loading on cable compounding lines.

Comparable Alternatives in India

Comparable EVA Grades

• EVAFLEX EV260: A related family grade from the Dow-Mitsui catalog. It features different internal flow characteristics and structural limits, making it a non-direct substitute that requires independent die adjustment.
• EVAFLEX EV40W / EV40LW / EV460: Alternative family choices targeting low-viscosity or specialized coating applications. These variants offer distinct mechanical and thermal behaviors and are not drop-in equivalents for applications optimized around V421’s 4 MFR balance.
• Domestic Polyolefin Alternatives: Local compounding plants offer various regional EVA resins that aim for similar flexibility metrics. However, substitution paths remain unconfirmed unless both the raw vinyl acetate content and the precise JIS/ASTM test parameters match the V421 datasheet.

Common Search Variants

Generic Terms and Frequent Misspellings

Industrial procurement buyers often query this material using terms like EVAFLEX EVA V421, Dow-Mitsui EVA V421, Mitsui EVA V421, and EVAFLEX V421 granules. Typographical variations in regional material inventory sheets include Evaflex 421, EVAflex V421, Evaflexe, and V-421 resin.