3M™ Thermal Bonding Film 668 is a flexible, light colored, thermoplastic adhesive bonding film which exhibits good adhesion to a variety of substrates. The bonding film is supplied on a release coated paper liner.
FEATURES
- Slight surface tack for temporary holding
- 100% solids
- Excellent heat resistanc
- Can be die-cut
- Excellent adhesion to many substrates
- Quick fixturing/holding strength
| Property | Values |
| Adhesive Thickness | 2.5 mil (0.06 mm) |
| 4.0 mil (0.10 mm) | |
| Liner Thickness | 3.0 mil (0.08 mm) [nominal] |
| Color | Translucent / Tan |
| Specific Gravity | 1.00 |
| Solids | 100% |
| Ball and Ring Softening Range | 149 to 160°C |
| 300 to 320°F | |
| Tensile Strength @ Break | ~2400 psi |
| Elongation @ Break | ~1000% |
| Two Lb. Dead Load Heat Resistance | 127°C |
| 260°F | |
| Shelf Life | 2 years |
