Janoschka magazine Linked_V4_2019

issue #4 ©
l i n k e d
43
It depends what you make of it
Blown or cast film? Which method is more efficient?
The answer to these questions depends on which film properties
are required and hence ultimately on the application. Cast
film systems with higher output are particularly efficient for
large batch sizes. Because of the efficient cooling, thicker and
highly transparent film can be optimally produced as cast film,
for example, for deep-drawing applications.
The tower can be more than 20m high
If different formats and thicknesses are required, for example,
for lid film, blown film extrusion is the better option, owing to
its ability to rapidly change the format. Because it is cooled less,
the result is more crystalline, so stiffer film can be produced.