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Features And Uses Of EVA

2022-10-19

EVA is an amorphous plastic, non-toxic, with a specific gravity of 0.95g/cm3 (lighter than water). The shrinkage rate is large (2%), and EVA can be used as the carrier of the color masterbatch.

EVA is a random copolymer of ethylene and vinyl acetate. It is characterized by good flexibility, toughness, low temperature resistance (still flexible at a temperature of 58°C), weather resistance, stress crack resistance, heat sealing, adhesion, exploratory processability, transparency and gloss. , At the same time, it has rubber-like elasticity, excellent ozone resistance, non-toxicity, good processing and dyeing properties, and good blending with fillers. The VA content in EVA and the relative molecular mass of EVA are different, and the performance is different. When the melt index is constant, the VA content increases, and its elasticity, softness, cohesion, compatibility, transparency and solubility increase; as the VA content decreases, its performance is close to that of polyethylene, that is, the rigidity becomes larger, Wear resistance and electrical insulation are improved. When the VA content is constant, the melt index increases, the softening point decreases, the processability and surface gloss improve, but the strength decreases; on the contrary, when the melt index decreases, the relative molecular weight increases, impact resistance and stress resistance. Crackability is improved.

The heat resistance and oil resistance of EVA are slightly inferior.

EVA can adopt the molding method and processing equipment of LDPE, and the processing temperature is 20-30 ℃ lower than that of LDPE.

The main molding methods are: injection molding, blow molding, extrusion, calendering, extrusion coating, multi-layer co-extrusion blow molding, foam molding, vacuum molding, secondary processing and other methods.

Main processing conditions: the extrusion film temperature is 140-180℃, and the injection molding temperature is 200-250℃.

EVA is widely used in the manufacture of films, composite films, various molded products, foamed products, adhesives, etc.


We are a professional Eva Bag manufacturer, we are selling Diamond Painting Bottle Kit, Diamond Painting, and different kinds of Eva Bags. More Anisotropic Bright Diamond Painting is on sale, welcome to inquire. We support OEM service, and can undertake sample processing and drawing processing.

Eva Bag

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