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What is UV curing system ?

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Presentation on theme: "What is UV curing system ?"— Presentation transcript:

1 What is UV curing system ?

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

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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