Multilayer Blown film Technology

Technology currently exists to produce blown films with up to 77 layers.
The most common number of co extruded layers in use today is 3 layers,
with a trend to 5- and 9-layer films.
As machinery advances are made,new product structures are created
to fulfill various market need.
A balance will be struck between the cost of new capital equipment
required to make 7/9/11-layer films,and the benefit derived from doing so.
The competition is not necessarily another machine supplier,or from a
lower cost producer,but from another technology that can laminate unlike films
to produce similar structures,namely adhesive lamination and extrusion lamination.
These technologies have coexisted for many years,and are likely to do so for their future.