Characteristics Of EVA Materials
EVA resin is characterized by good flexibility, rubber-like elasticity, good flexibility at -50 ° C, good transparency and surface gloss, good chemical stability, anti-aging and ozone resistance. Good, non-toxic. It has good blending property with filler, and has good coloring and molding processability.
It has a great relationship with vinyl acetate content and molecular weight, and melt index. When the melt index (MI) is constant and the vinyl acetate (VAC) content is increased, the elasticity, flexibility, compatibility, transparency, and the like are also improved. When the VAC content is reduced, the performance is close to that of polyethylene, the rigidity is increased, and the wear resistance and electrical insulation are improved. If the VAC content is constant, the melt index decreases, the workability and surface gloss are improved, but the strength is decreased. Otherwise, the molecular weight increases as the MI decreases, and the impact performance and environmental stress crack resistance increase. The polarity of the acetate increases the elasticity and viscosity, decreases the crystallinity and electrical properties, and dissolves in hydrocarbon solvents and oils.