High-performance screen-printable dielectric ink for electrode insulation, encapsulation & printed electronics

Sigma-Aldrich™ Polymer Dielectric Grey is a specialized, screen-printable dielectric paste engineered for high-precision applications in printed electronics, flexible circuitry, sensor fabrication, and encapsulation processes. This grey polymer dielectric forms a robust, flexible, and chemically resistant insulating layer designed to protect electrode tracks—particularly during immersion or subsequent processing steps.

Its balanced formulation ensures excellent printability, smooth film formation, and reliable dielectric performance, making it ideal for advanced research and industrial electronic printing.

Key Features & Benefits

High-Quality Dielectric Layer

• Provides strong electrical insulation and encapsulation for electronic traces
• Ideal for defining electrode regions in multilayer printed circuits
• Protects sensitive electronic patterns during liquid exposure and immersion

Optimized for Screen Printing

• Designed for use with 156–325 tpi stainless steel or polyester screens
• Long ink screen life (>3 hours) allows extended printing cycles
• Smooth, defect-free film formation
• Compatible with semi-automatic and automatic screen printers

Robust Chemical Resistance

Resistant to a wide range of industrial solvents, including:

• THF → Attack
• Acetone → Attack
• DMAC → Attack
• DMF → Attack
• MEK → Full attack

Provides stable performance during typical processing workflows.

High Coverage & Controlled Viscosity

• Coverage: 305 cm² per gram (230 mesh screen, 13 µm emulsion)
• Viscosity: 12–16 Pa·s (Haake RS1 C20/2° TiL at 230 s⁻¹, 25°C)
• Solid content: 50–55% at 150°C

Drying, Processing & Handling

Typical Drying Conditions

• 80°C for 30 minutes
• or 130°C for 10–15 minutes
• Suitable for jet drying, IR drying, and high-speed reel-to-reel drying

Compatible Substrates

• Polyester (PET)
• PVC
• Polycarbonate
• Ceramic
• Alumina

Cleanup Solvents

• Ethoxy propanol
• Sericol cleaners

Applications

1. Electronics & Sensor Fabrication

• Dielectric layer for printed electrodes
• Encapsulation of conductive tracks
• Overcoating for sensor circuits
• Printed biosensors and microfluidic electrodes

2. Flexible and Wearable Electronics

• Flexible printed circuits (FPCs)
• Stretchable electronics and smart textiles
• Low-profile insulated interconnects

3. Advanced Optoelectronic Devices

• MRI receiving coils (insulating layers for coil patterns)
• OLED device fabrication as insulating interlayers
• Organic Thin Film Transistors (OTFTs) dielectric layers

4. R&D and Prototyping

• Rapid prototyping of printed electronic components
• Research into polymeric dielectric materials
• Device development requiring encapsulation stability

Sustainability & Green Chemistry

This material is classified under the Greener Alternative Product – Enabling category, supporting:

• Improved energy efficiency
• Reduction of energy-intensive curing and processing steps

Aligned with the 12 Principles of Green Chemistry.

Technical Data Summary

Ordering Information

Sigma-Aldrich™ Polymer Dielectric Grey is a high-performance printable dielectric optimized for screen printing applications in modern electronics manufacturing. Its excellent insulating properties, substrate compatibility, chemical resistance, and process flexibility make it an essential material for printed electronics, sensors, OLED/OTFT devices, and circuit encapsulation.