Publish Time: 2016-09-20 Origin: Site
A typical 5 -layer film structure,consits of a core layer of EVOH as a barrier layer,
inner and outer layers of LLDPE,and"tie" or adhesive layers to join together
the otherwise incompatiable LLDPE & EVOH.
This structure is ubiquitous today, and is used in many applications.
For the many basic package structures,a 5-layer film obviates the need for an adhesive lamination step.
Some might agrue that the modulus of oriented PP & PET films are greater than unoriented nylon films,
and that laminations are superior to unoriented blown films,and that the film structure is inadequate for many packaging applications.