Overview
EVA20F20 is a thermoplastic copolymer composed of 20% vinyl acetate (VA) and 80% ethylene by weight. This ratio balances flexibility and processability, making it a versatile material for industrial applications. It is produced via high-pressure polymerization and supplied as pellets or granules for easy handling. As a non-polar material, EVA20F20 exhibits excellent compatibility with fillers and modifiers, allowing tailored properties for specific uses. Its popularity stems from cost-effectiveness and performance in adhesive formulations and foam production.
Physical and Chemical Properties
EVA20F20's properties are defined by its VA content and molecular weight distribution. The 20% VA content provides superior elasticity compared to lower-VA grades, with a Shore A hardness of 30-50. Its melt flow index (MFI) typically ranges from 2-45 g/10min, affecting processing methods like injection molding or extrusion. The material shows strong resistance to UV radiation and cracking, attributed to the ethylene backbone. However, it has limited chemical resistance to oils and solvents. Thermal stability is moderate, with a continuous service temperature up to 80°C.
Main Applications
In adhesives, EVA20F20 serves as a key component in hot-melt formulations for packaging and bookbinding due to its strong adhesion to porous materials. The footwear industry uses it for midsole foams, where its cushioning properties reduce product weight by 20-30% compared to rubber. Solar panel manufacturers utilize EVA20F20 as an encapsulant for photovoltaic cells, leveraging its light transmittance and durability. Emerging applications include cable insulation and toy manufacturing, where flexibility and safety are paramount.
Safety and Storage
EVA20F20 is classified as non-hazardous under GHS standards. Processing at temperatures above 200°C may release acetic acid vapors, requiring adequate ventilation. Bulk storage should avoid direct sunlight to prevent premature aging, with recommended shelf life of 12 months in original packaging. For fire safety, use CO2 or dry chemical extinguishers. Spills should be collected mechanically without water flushing. Personal protective equipment (PPE) such as dust masks is advised during handling to minimize particulate inhalation.
B2B Procurement Guide
When sourcing EVA20F20, confirm the VA content tolerance (±1%) and MFI range matching your equipment specifications. Reputable suppliers provide technical data sheets (TDS) with DSC curves for melt point verification. Bulk shipments (20-25 MT containers) often yield 10-15% cost savings compared to bagged quantities. Quality indicators include consistent pellet geometry and absence of yellowing. For regulatory compliance, request certificates for FDA (21 CFR 177.1350) and EU food contact applications if relevant. Just-in-time delivery is preferable to minimize storage costs.
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