- Excellent stretchablity and recovery characteristics, moisture and heat resistance (20% x 200,000 cycles, 85°C/85%RH)
- Wiring formation by screen printing
Product DescriptionPolymer synthesis technology to control coating layer morphology + Conductive filler dispersion control technology
Advances in IoT and 5G technology have been attracting widespread attention in recent years. In line with this trend, the Toyo Ink Group is working to accelerate the development of conductive pastes for use in stretchable electronic devices. The pastes conform to a variety of flexible and elastic substrates and are expected to further expand applications in the wearable and robotics fields.
Product Features
- Excellent durability and conductivity to withstand repeated stretching
- Capable of wiring formation on flexible substrates by screen printing
- Excellent moisture and heat resistance
Stretch test video
Product Details
| Printing method | Screen printing |
|---|---|
| Curing conditions | 80 - 120°C / 30min |
| Volume resistivity | 2.0×10-4（Ω･cm） |
| Durability for repeated stretching | Maintains conductivity even when expanded and contracted 20% × 200,000 times |
*The above values are representative and not guaranteed.
Specimen composition and test conditions
Elongation rate: 20％
Stretching speed: 10mm/s
Test environment: 23°C, 50%RH
No significant increase in resistance after 200,000 expansion/contraction cycles
Restore almost to initial resistance in a few minutes
Retention initial resistance even after storage at high temperature and high humidity
Applications
Technology OverviewPolymer synthesis technology to control coating layer morphology + conductive filler dispersion control technology
The Toyo Ink Group has developed conductive pastes for stretchable electronics with excellent characteristics to withstand repeated expansion and contraction, environmental resistance, and printability by applying our polymer synthesis technology to control the morphology of coating layers and our dispersion technology for conductive fillers.
Polymer synthesis technology to control the morphology of coating layers
・Morphology control
Our development teams can design and synthesize polymers for various properties with controlled primary structure (molecular arrangement, molecular weight, molecular weight distribution, etc.). This makes it possible to impart properties such as stretching durability, humidity and thermal resistance, and substrate adhesion.
We can design polymers according to various properties and synthesize polymers with controlled primary structure (molecular arrangement, molecular weight, molecular weight distribution, etc.). This allows us to impart properties such as elasticity durability, environmental resistance, and substrate adhesion.
Polymers with various primary structures can form the following self-assembled structures to control their physical characteristics.
・Relationship between morphology and mechanical properties
Elastic properties are achieved by controlling the primary structure of polymers and the morphology of coating layers.
[ Stress-Strain Curve ]
Conductive filler dispersion control technology
By controlling the dispersibility of the conductive filler through improvements in polymer-filler affinity, we have achieved a conductive paste with good conductivity capable of withstanding expansion and contraction (elastic deformation), and with excellent printability.
