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 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
Chemical resistance , fast cure and hardness
Paper coating
Overprint varnish
Wood coating
Ink application (screen , offset)
Solder resist ink

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
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)