Ethy Vinyl Acetate 18J3

Ethylene vinyl acetate (EVA) Introduction:

Ethylene-Vinyl Acetate (EVA) thermoplastic materials also known as polyethylene-vinyl-acetate (PEVA), is a copolymer of ethylene and vinyl acetate. In this formation, the weight percentage is variable ranging from 10 to 40 percent and remaining part is ethylene.

EVA copolymer is primarily of three different types, which differ in their vinyl acetate content and the way in which material is used. This porous elastomeric material is approximately three times more flexible than low-density polyethylene (LDPE) with tensile elongation of 750% and highest melting temperature as 250°F (96°C).

Types of EVA

• Vinyl Acetate Modified Polyethylene (Low VA Density)

• Thermoplastic Ethylene-Vinyl Acetate (Medium VA Density)

• Ethylene Vinyl Acetate Rubber (High VA Density)

  
  

  
  

  
  

Propeties of ethy vinyl acetate:

Basic properties:

The material provides good clarity and gloss.

Highly resistant towards stress cracking and UV radiation.

Low-temperature resistance.

High friction coefficient.

It has a distinctive vinegar-like odor.

Physical and Chemical propeties of EVA:

Melting point – 75°C

Tensile strength is 0.05-0.2 N/mm2 and notched impact strength is no break Kj/m2

Density is 0.948 g/ml at 25 °C

Flash Point – 260°C

Thermal Coefficient of expansion 160 – 200 x 10-6

Stability – Stable, Combustible & incompatible with strong oxidizing agents.

They have very good resistance to Dilute Acids and Alkalis, Aliphatic Hydrocarbons, Alcohols, Oil, and Greases.

They have poor resistance to Aromatic Hydrocarbons and Halogenated Hydrocarbons.

Applications of  EVA:

Film

Foam

Hot Melt Adhesives

Wire & Cable

Extrusion Coating

Solar Cell Encapsulation

Others (Injection Molding and Medical Tubing)

End user of EVA:

Automotive

Packaging & Paper

Paints, Coatings & Adhesives

Electronics & Electrical

Pharmaceutical

Footwear

Photovoltaic Panels

Others (Agriculture and Medical)