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How did the film blow out?
- Sep 03, 2018 -

How did the film blow out?

Extrusion blown film is actually produced by extruder with blown film auxiliaries. It can be classified as extrusion molding and sometimes in blow molding.
When the film is blown, the extruded material is extruded into a cylinder through an annular die, and then a certain amount of compressed air is injected into the tube to make it blown horizontally. Blow molding process is divided into upper blowing method, flat blowing method and bottom blowing method according to film forming direction. PVC blowing and blowing are the main methods.
In addition, the thermal shrinkable film with a certain shrinkage can be obtained by re-heating the film after a single bloating, re-bloating in the viscoelastic state, and cooling and setting.