Cross-linking in double-bubble extruded plastic film manufacturing

Cross-linking in double-bubble plastic film manufacturing

GEW provides engineered UV solutions to apply very high dosages of UV energy to correctly expose and cross-link delicate materials, whilst protecting them from heat damage.

Double-bubble extruded plastic films can be manufactured using special raw materials that can be cross-linked under UV light to enhance their characteristics and performance.

GEW have comprehensive experience of providing engineered UV solutions, usually GEW’s NUVA2 mercury system in such instances, to apply very high dosages of UV energy to correctly expose and cross-link these delicate materials, whilst protecting them from heat damage.

Here, a GEW irradiation unit is installed inline between the extruder where the primary plastic tube is formed and quenched, and the bubble tower where the film is stretched and oriented. 

The flattened primary tube passes through the irradiation unit, which comprises two stacks of UV lampheads mounted against water-cooled rollers to alternately expose and cool both sides of the flattened tube.

Depending on the application and the UV energy dose that needs to be applied, the irradiation stacks can consist of a greater or lesser number of lamps.

To safely contain all UV radiation, the irradiation units are fully enclosed and feature interlocked doors which only allow the lamps to operate when fully closed.

The enclosure also provides thermal protection for the UV lampheads, which often need to operate in ambient temperatures above 50°C. Where the UV irradiators are installed in a high ambient, the lampheads are cooled using GEW’s Positive Purge solution to feed the lamps with cooler air from outside the building.

Watch the video below to find out more about NUVA2:

This is just one example of how GEW can help, by creating bespoke UV curing solutions tailored to your individual requirements. Contact our sales team to discuss how we can help you:

Speak directly to our Sales team

David Lyus GEW

Region, UK:
David Lyus
International Sales Manager

T: +44 7713 085 381

Email David directly

Jennifer Heathcote GEW

Region, Americas:
Jennifer Heathcote
Vice President, Business Development

T: +1 440 381 5606

Email Jennifer directly