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What is UV curing system ?

What is UV curing system ?. SOLTECH LTD. Advantages. Energy saving No volatile solvent Very short cure time No heat One pack system Space saving. UV (200~400nm) curing. UV. Photo-initiator P. (free radicals) Free radical + monomer + oligomer Cross linked polymer network.

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What is UV curing system ?

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  1. What is UV curing system ? SOLTECH LTD.

  2. Advantages • Energy saving • No volatile solvent • Very short cure time • No heat • One pack system • Space saving

  3. UV(200~400nm) curing UV • Photo-initiator P. (free radicals) • Free radical + monomer + oligomer • Cross linked polymer network

  4. Oligomer • Epoxy acrylate • Urethane acrylate • Polyester acrylate • Acrylic acrylate • Amino acrylate

  5. Epoxy acrylate (1) • Paper coating • Overprint varnish • Wood coating • Ink application (screen , offset) • Solder resist ink Chemical resistance , fast cure and hardness

  6. Epoxy acrylate (2) • BPA epoxy acrylate (Solmer E 120,145,146,1686…) • Paper and wood coating • Acrylate of epoxydized oil (Solmer E 186…) • ink application • Modified epoxy acrylate (Solmer E 1701,1702,1703..) • screen ink , paper and wood • Novolac epoxy acrylate (Solmer E 1626,1636,1656..) • solder resist , hard coating • Acid modified Epoxy Acrylate (Solmer E 1695…) • PSR , metal coating

  7. Urethane Acrylate (1) • Toughness , flexibility , adhesion and non-yellowing • Plastic and film coating • Floor tile coating • Screen ink • PVC floor and wood coating • Adhesive • Anti-fog coating

  8. Urethane Acrylate (2) • Polyester type (Solmer U 584, 594, 580…) • adhesion , toughness • Polyether type (Solmer U 530, 564…) • flexibility , fast cure • Others (Solmer U 522, 522B, 520, 5260…) • fast cure , hardness

  9. Polyester Acrylate • Adhesion , pigment-wetting , low viscosity • Offset and screen ink • Solmer P 236… • Etching resist • Solmer P 270,271,272… • Paper and Wood coating • Solmer P 280,281… • Flexo ink • Solmer P 280,281… • Laminating adhesive • Solmer P 220…

  10. Acrylic acrylate • Adhesion , solvent resist , non-yellowing • Plastic coating • Overprint varnish • Adhesive • Solmer A 345,364,3710

  11. Amino acrylate • Improve UV cure response • Paper and Wood coating • Screen ink • Solmer Z 115, 225

  12. Additive • Silicone Acrylate (Solmer Z 9135, 9136…) • slip and substrate wetting • Adhesion promoter (Solmer Z 9166, 9167) • PCB ink , metal and plastic coating • Non-silicone leveling agent (Solmer Z 9070) • screen ink

  13. Monomer (1) • How to select monomer? • Viscosity and Solubility • Volatility • Odor and toxic property • Reactivity and functionality • Percent of shrinkage

  14. Monomer (2) • Mono : NVP, Styrene, IBXA, PEA… • Di : TPGDA, HDDA, TTEGDA… • Tri : TMPTA, PETA • Others : PE4A, DPHA

  15. Monomer (3) • A : viscosity, reactivity, hardness, gloss, chemical resistance • B: flexibility, solvency, adhesion

  16. Strategy for formulation • 1. Select Oligomer(s) for basic film forming properties • 2. Use Monomer for viscosity control • 3. additives for performance fine tuning • 4. photo-initiator package is critical

  17. General principles • 1.Each component plays a key role in total performance • Formulate for total performance • Optimize on performance requirements • Viscosity control, simple dilution no!

  18. General principles • 2. formulations are sensitive to curing process parameters and equipment • Use controls in experimental design to see effects of external factors

  19. General principles • 3. cost/performance is the key • Raw material costs • Volume dependency • Energy costs • Labor costs • Competitive pricing

  20. Oligomers • Basic film forming properties • Hardness abrasion resistance • Chemical resistance scratch resistance • Flexibility adhesion • Toughness weatherability

  21. Oligomers • Other considerations • Cure speed stability • Cost toxicity • Special properties availability

  22. Monomers • Viscosity reduction • Flexibility (monofunctional) • Crosslinking (multifunctional) • May also increase speed

  23. Additves • Wetting pigment • Flow filler • Slip temperature • resistance • adhesion

  24. Photo-initiator • Cost type of system • Pigment/color processing variables • Film thickness

  25. Application • Wood , paper & board coating • Plastic (PVC floor, ABS, PC,PP) • Adhesive (laminating, PSA) • Ink (screen, wet & dry offset, flexo)

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