851 Greenback Printed Circuit Board Tape is a green polyester film tape with a special conformable adhesive which resists plating bath chemicals.
The 3M 851 Greenback Printed Circuit Board Tape is a translucent green polyester film backed with a special blend of silicone and rubber adhesive. It is designed for masking, splicing, and protecting printed circuit boards during soldering and plating processes.
Key features include a 100 µm thickness, 12‑month shelf life when stored at 21 °C (70 °F) and 50 % RH, adhesion of 2.7 N/10 mm to stainless steel, tensile strength of 36.8 N/10 mm, 56 % elongation at break, and a maximum service temperature of 90 °C. The tape reduces stretch, undercutting, and adhesive transfer, helping to lower reject rates and labor costs.
| Adhesive Type | Special blend of Silicone and Rubber |
|---|---|
| Backing | Transparent polyester |
| Thickness | 100 um |
| Tape Colour | Translucent green |
| Shelf Life | 12 months at 21 °C and 50 % RH |
| Adhesion to Stainless Steel | 2.7 N/10mm |
| Tensile Strength | 36.8 N/10mm |
| Elongation at Break | 56 % |
| Maximum Temperature | 90 °C |
Store the tape in its original carton at 21 °C (70 °F) and 50 % relative humidity for up to 12 months.
It uses a special blend of silicone and rubber adhesive.
The tape can be used up to a maximum temperature of 90 °C.