Blown film extrusion plant
OwnerFriedrich Ohlendorfinventor
Life of this patent
Estimating the term…
Abstract
In a blown film extrusion plant comprising a blow head and an air cooling ring, between the blow head and the air cooling ring at least one cooling device should be provided.
Claims10
1-12. (canceled)
Blown film extrusion plant comprising:
- a blow head for producing a film bubble;
- an air cooling ring;
- and
- a cooling device located between the blow head and the air cooling ring, the cooling device comprises an internal contact surface which contacts the film bubble;
- and
- conduit means in the cooling device for feeding a cooling medium to the internal contact surface for cooling the film bubble.
Method for producing a film bubble by a blown film extrusion plant wherein a film bubble is extruded from a blow head and is subsequently cooled in an air cooling ring including the step of locating between the blow head and the air cooling ring a cooling device having an internal contact surface which contacts the film bubble, and feeding a cooling medium to the internal contact surface for cooling the film bubble for providing a higher degree of orientation and improved strength properties, as well as an increase in mass output.
Dependencies are inferred from the claim text.