Flexible Hi-Flow is the new "phase change" material designed specifically to replace grease as a thermal interface. This is a filled polymer which is now available in a pad form for easier handling and installation. At 65C flexible Hi-Flow changes from a solid and flows thereby assuring total wet-out of the interface. The thixotropic characteristics of the material keep flexible HI-flow from flowing out of the interface. The result is a thermal interface comparable to grease, without the mess, contamination and difficult handling associated with grease.
Features
- Hi-Flow coated aluminum
- Available in pad form as punched parts, sheets or rolls
- Low volatility-less than 1%
- Easy to handle in the manufacturing environment
- Flows but doesn't run like grease or wax under continuous heat or in vertical applications
- Low contact thermal resistance of 0.05 C-in^2/W
- Tack free at room temperature. Does not attract contaminants
- Scratch resistant at room temperature. Does not require protective liner in shipment when attached to heat sink
- Flexible Hi-Flow has thermal performance equal to grease with. 0.5 Celsius-in^2/W contact thermal resistance
- Flexible Hi-Flow is used in applications where electrical isolation is not required
- Typical applications for flexible HI-flow include CPUs mounted on a heat sink, power conversion modules or any other spring or clip mount application where grease is used
- Flexible HI-flow is coated on both sides of the aluminum substrate. The product is available as a dry material or with thermal acrylic adhesive on one side to aid in positioning
- Modified ASTM D5470 test method used. Sample run at 70 Celsius
| Physical properties | Typical value | Test method | Thermal/electrical properties | Typical value | Test method |
|---|---|---|---|---|---|
| Color | Dark gray | Visual | Thermal resistance (Celsius-in^2-W^-1) (C-mm^2/watt) | < 0.05 w/o AC, < 0.32 w/o AC | ASTM D5470 |
| Substrate | Aluminum | N/A | Thermal resistance (Celsius-in^2-W^-1) (C-mm^2/watt) | < 0.05 w/AC, < 0.32 w/AC | N/A |
| Thickness of substrate | 0.0015 in. 0.04mm | ASTM D374 | Thermal conductivity of coating w-m/K | 0.9 | ASTM D5470 |
| Thickness of thermal acrylic adhesive | 0.0005" (one side) 0.0127mm | ASTM D374 | Dielectric constant of coating (100Hz) | 3.2 | ASTM D150 |
| Thickness of material | 0.0055" +/- 0.001", 0.14mm | ASTM D374 | N/A | N/A | N/A |
| Specific gravity of coating | 1.8 | ASTM D792 | N/A | N/A | N/A |
| Phase change temperature (Celsius) | 65 | N/A | N/A | N/A | N/A |
| Continuous use temperature (Celsius) | -30 to +130 | N/A | N/A | N/A | N/A |
Main Products
cooler, trimmer, multi - fuse, thermal solution series, L.C.D driver, remote control encoder / decoder