Solvent, UV and UV-LED Inks

Solvent, UV and UV-LED Inks
Dan Miller, Laura Maybaum
Goals
• Review solvent-based, UV and UV-LED Inks
• Trouble shooting
• Use in membrane switch / nameplate, IMD,
electronic glass applications
* Expertise is based on products we know
Solvent / Conventional Inks
Solvent
Solvent
Evaporative
Screen Ink
Resin
60%
Pigment
Additives
40%
Solvent
Pigment
Additives
Resin
Drying
Air surround
Temperature
Time
Additives
Crosslinking: temperature, time
Temperature
Time
Additives
Pigment
Additives
Resin
Cross Link
Colors / Solvent Inks
Nameplate / Membrane Switch
• Adhesive resistance
• Embossing / Cutting
Substrate
– Ink to substrate
– Ink to adhesive
– Ink to ink
Mounting Surface
Adhesive
Mounting Surface
Adhesive
• Inter-adhesion
Substrate
White, Red, Black Ink
In-Mold Decorating
• Inter-adhesion
– Ink to substrate
– Ink to ink
– Ink or Tie-Coat to resin
• Resistance to IMD Process
Resin
Tie-Coat
White, Red,
Black Ink
– Temperature
– Pressure
• Higher Elongation
Substrate
Electronic Applications
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Ink to glass
Chemical(s) resistance
Caustic resistance
Water resistance
White &
Black Ink
Substrate
UV Inks & UV-LED Inks
• Requirements to cure – different
– mJ / mW
– Radiometer measurement
• Initiated initiators to gain performance - same
UV & UV-LED Curing Inks
Resins / Oligomers
UV & UVLED
Curable
Screen Ink
Monomers
Pigment
Additives
Photo-initiator
100% Ink
Curing / Cross-linking
Oligomer / Monomer / Additives
Pigment
Initiator
Through Cure
Under Cure
Full Cure
Surface Cure
Under Cure
Full Cure
Differences in Color
Windowing
Tailored to
White Pigment
Greys =
Slow Curing
Tailored to
Black Pigment
Trouble Shooting
• Life Cycle of product
– Completeness of curing / production tolerance
– Assumptions from color to color
• Higher pigment load
• Mixing of colors
Trouble Shooting
• Inter-printing
– Solvent inks / Solvent Inks
– UV inks / UV Inks
– Solvent inks / UV Inks
• Transitioning
– Solvent to UV-LED
– UV to UV-LED
More Time for Questions
• Printed Electronics Symposium / SGIA Show
• [email protected]
• Booth #3327

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