Cationic UV Flexo Ink – TWG-FXUCAT | Triwill Group

TWG-FXUCAT is a specialist cationic UV flexo ink formulated for demanding flexible packaging and shrink sleeve applications where standard UV inks may not provide sufficient adhesion or flexibility. Cationic UV inks cure through a different mechanism to standard free-radical UV inks, offering outstanding adhesion to challenging substrates including polyolefin films, and excellent flexibility after curing — essential for shrink sleeve label applications.

Designed for UV-equipped commercial flexo presses, TWG-FXUCAT delivers the technical performance required for premium flexible packaging and shrink sleeve printing, combining reliable UV curing with the adhesion and flexibility properties these demanding applications require.

Key Features:

• Cationic UV Cure: Cures via cationic mechanism for superior adhesion to polyolefin films and shrink sleeve substrates.
• Excellent Flexibility: Maintains flexibility after curing, essential for shrink sleeve label and flexible packaging applications.
• Strong Film Adhesion: Outstanding adhesion to challenging film substrates including PP, PE, and shrink sleeve materials.
• UV Press Compatible: Designed for use on UV-equipped commercial flexographic printing presses.
• Premium Print Quality: Delivers vibrant, consistent colour output for high-quality flexible packaging and shrink sleeve printing.

TWG-FXUCAT is the specialist cationic UV flexo ink for UK packaging printers requiring superior adhesion and flexibility on film substrates and shrink sleeve label applications.

Frequently Asked Questions

What are the main benefits of using UV inks in flexo printing?

UV inks for flexo printing cure instantly under UV or LED lamps, delivering faster production speeds, zero solvent emissions, and excellent print quality. Cationic UV flexo inks like TWG-FXUCAT offer the additional benefit of superior adhesion to challenging polyolefin film substrates and post-cure flexibility for shrink sleeve applications.

How do UV flexo inks compare to water-based inks for flexible packaging?

UV flexo inks offer instant curing, stronger adhesion to non-porous film substrates, and superior surface properties compared to water-based flexo inks. For flexible packaging film applications, cationic UV flexo inks like TWG-FXUCAT typically deliver stronger adhesion and better performance on challenging film substrates.

What curing equipment is typically required for UV flexo inks?

UV flexo inks require a flexo press fitted with UV curing lamps — either mercury UV arc lamps or LED UV systems. Cationic UV flexo inks like TWG-FXUCAT require UV curing systems capable of providing sufficient UV energy for complete cationic cure. Contact Triwill Group for guidance on curing system requirements.

What are common adhesion problems with UV flexo inks on film substrates?

Common adhesion issues include insufficient surface energy on the film, incorrect curing energy, and ink-substrate incompatibility. TWG-FXUCAT is specifically formulated for improved adhesion on polyolefin films and shrink sleeve substrates. Contact our technical team for troubleshooting support on film adhesion issues.

Explain the difference between mercury and LED UV curing for flexo applications?

Mercury UV curing uses broad-spectrum mercury arc lamps. LED UV curing uses specific UV wavelength LED lamps, offering lower energy consumption, longer lamp life, instant on/off operation, and reduced heat output. Contact Triwill Group for guidance on our UV flexo inks for your specific curing system.

What are the safety precautions when handling UV flexo inks?

UV flexo inks should be handled with nitrile gloves and eye protection as uncured UV inks can cause skin sensitisation. Avoid prolonged skin contact and wash hands thoroughly after handling. Follow all COSHH guidelines and refer to the product SDS for TWG-FXUCAT for specific handling and safety information