How is the blow up ratio of a plastic film calculated? What's its formula?
The ratio of film diameter to die diameter in blown film.
Blow up ratio is blown film film diameter and blowing up after the film bubble diameter ratio, there is a simple algorithm, the film finished product multiplied by 2 divided by 3.14, that is, the film bubble diameter. Membrane diameter is certain
Well, the draw ratio is the ratio of the annular section area to the cross sectional area of the mandrel between the mandrel and the die. But I don't know the blowing ratio of PE and PO.
