Polyethylene EVA films

   

 

EVA (Ethyl Vinyl acetate) is usually coextruded with polyethylene.The main characteristic of EVA is to enable a lower softening and melting points of the PE film.It also increases the impact strength and puncture resistance of the film. EVA is a poor barrier to gases and average to moisture.

However, the mechanical properties due to EVA depends of vinyl acetate content. Higher this pourcentage is, lower is the permeability to gas and moisture, and better the clarity.

. Coextruded with LDPE, EVA gives a film with better stretch properties, decreases the permeability to gases and moisture and provides a lower sealing temperature.

 

    

PE EVA film properties :

  • Low softening and melting points.
  • Good flexibility,
  • Permeability to gases but improves water vapour permeability
  • Improves impact strength
  • Improves sealability.
  • Non Toxic, is largely used in food packaging industry.

 

PE EVA film applications :

  • to pack rubber additives in rubber industry
  • Chemical compounding (tyre industry)
  • to pack wax
  • to pack additives
  • Surgical gloves
  • LFT : Lay Flat Tube. This is the basic product obtained by blown extrusion, a tubular film. At the end of the process, the plastic film is winded on a core and flattened.

 

  • CFS : Centre fold sheet. It is a lay flat tube cut (or opened) on one side.

 

  • SWS : Single wound sheet. This film is obtained when both edges of a lay flat tube (or tubular film) are cut. Each film is then winded on a core.