What is UV curing system ? SOLTECH LTD. 2017-03-25

Advantages Energy saving No volatile solvent Very short cure time No heat One pack system Space saving 2017-03-25

UV(200~400nm) curing Photo-initiator P. (free radicals) Free radical + monomer + oligomer Cross linked polymer network 2017-03-25

Oligomer Epoxy acrylate Urethane acrylate Polyester acrylate Acrylic acrylate Amino acrylate 2017-03-25

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

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

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

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

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…

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

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

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

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

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

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

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

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!

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

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

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

Oligomers Other considerations Cure speed stability Cost toxicity Special properties availability

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

Additves Wetting pigment Flow filler Slip temperature resistance adhesion

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

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