DirectCure

DirectCure medium pressure lamps produce high radiation between 190 and 220 nm. This stimulates acrylate molecules and directly generates start radicals for the polymerization and crosslinking of acrylate-based printing inks and varnishes.

The use of DirectCure lamps as intermediate or final curing or also for post-curing of prints is the easy way to produce low-migration prints. Suitable curing systems are available.

The migration values achieved with DirectCure are comparable to electronic beam curing.

Advantages:

  1. Achieving food compatibility (migration)
  2. Suitable for applications that could previously only be achieved using EBC (electronic beam curing) = great price advantage for the customer
  3. Simple retrofitting of all existing inert systems
  4. UV systems without inert can also be retrofitted by adding an inert chamber
 
Characteristics:
 

Highest conversion of double bonds through direct stimulation of the acrylates:

  • Enhancement of chemical and temperature resistance
  • Better light and weathering resistance
  • Crosslinking density higher than with electron beam curing

Very low concentrations (<0.5%) of photo initiators required:

  • Significant reduction in migration and VOC emissions
  • No UV smell
  • Limit values for migration from food packaging can be observed