What is UV curing system SOLTECH LTD 2020

What is UV curing system ? SOLTECH LTD. 2020 -11 -10 1

Advantages Energy saving n No volatile solvent n Very short cure time n No heat n One pack system n Space saving n 2020 -11 -10 2

UV(200~400 nm) curing UV Photo-initiator P. (free radicals) n Free radical + monomer + oligomer n Cross linked polymer network n 2020 -11 -10 3

Oligomer Epoxy acrylate n Urethane acrylate n Polyester acrylate n Acrylic acrylate n Amino acrylate n 2020 -11 -10 4

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

Epoxy acrylate (2) n n n n n 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) n Toughness , flexibility , adhesion and non-yellowing n Plastic and film coating Floor tile coating Screen ink PVC floor and wood coating Adhesive Anti-fog coating n n n

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

Polyester Acrylate n n n 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…

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

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

Additive n n n 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? n Viscosity and Solubility n Volatility n Odor and toxic property n Reactivity and functionality n Percent of shrinkage n

Monomer (2) n n Mono : NVP, Styrene, IBXA, PEA… Di : TPGDA, HDDA, TTEGDA… Tri : TMPTA, PETA Others : PE 4 A, DPHA

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

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

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

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

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

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

Oligomers n Other considerations Cure speed n Cost n Special properties n stability toxicity availability

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

Additves Wetting n Flow n Slip n n n adhesion pigment filler temperature resistance

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

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