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Pyralux® GFL low loss sheet adhesive is a proprietary B-staged modified epoxy adhesive. This stand-alone adhesive exhibit low loss characteristics for high performance applications, while retaining excellent mechanical resilience to facilitate high-yield circuit fabrication. Pyralux® GFL is primarily utilized to bond flexible inner layers or rigid cap layers in flexible and rigid-flex constructions.
| Property Group | Property Name | Value | Test Method |
|---|---|---|---|
| Dielectric | Dielectric Constant (Dk) 10GHz | 2.5 | ASTM D2520 / IPC-TM-650 2.5.5.3 |
| Dielectric Strength (V/μm) | > 140 | ASTM D149 | |
| Loss Tangent (Df) 10GHz | 0.0017 | ASTM D2520 / IPC-TM-650 2.5.5.3 | |
| Electrical / Insulation | Surface Resistance (Ω) | >1×10^14 | IPC-TM-650 2.5.17 |
| Volume Resistivity (Ω・cm) | >1x10^16 | IPC-TM-650 2.5.17 | |
| Environmental | Moisture Absorption (%) | < 0.3 | IPC-TM-650 2.6.2 |
| Mechanical | Elongation at Break (%) | 190 - 315 | IPC-TM-650 2.4.19 |
| Tensile Modulus (Gpa) | 0.03 - 0.05 | IPC-TM-650 2.4.19 | |
| Safety | Flammability (UL 94) | Pass (VTM-0) | UL94 |
| Property Name | Form Factor | Package | Adhesive Type | Adhesive Thickness (μm) | Adhesive Thickness (mil) |
|---|---|---|---|---|---|
| GFL0015 | Sheet adhesive | Roll | Epoxy | 15.0 | 0.6 |
| GFL0020 | Sheet adhesive | Roll | Epoxy | 20.0 | 0.8 |
| GFL0025 | Sheet adhesive | Roll | Epoxy | 25.0 | 1.0 |
| GFL0030 | Sheet adhesive | Roll | Epoxy | 30.0 | 1.2 |