3M™ Very Low Outgassing Polyester Seal Tape 6690SP is a 3.0 mil total thickness, low outgassing, polyester backed, single coated sealing tape for Hard Disk Drive assembly and related electronics sealing applications. This product has a 2.0 mil metalized polyester backing offers a glossy visual appearance along with the functional properties of
low static discharge, low diffusivity, and high tensile strength.
FEATURES
- Low outgassing acrylic adhesive offers excellent chemical performance and high shear strength
- Permanent yet workable level of adhesion to a variety of substrates
- Enhanced to eliminate measurable organic acid from the outgassing signature
- Construction includes the proprietary 3M™ Non-Silicone / Non-Fluorine Polyester Liner 5977
APPLICATIONS
- Sealing of hard disk clamshells.
- Sealing of other electronic devices or instrumentation requiring a low outgassing adhesive tape product.
- Other permanent applications requiring an exceptionally high chemical purity, single coated tape.
| Property | Values | Unit |
| Tape Thickness | 3.0 | mil |
| 0.076 | mm | |
| Adhesive Thickness | 1.0 | mil |
| 0.025 | mm | |
| Release Liner Thickness | 2.0 | mil |
| 0.051 | mm | |
| Tensile Strength | 440 | N/dm |
| Elongation | 120 | % |
| Shelf Life | 2 | years |
