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3M 851

3M 851 with polyester film and blended silicone and rubber adhesive used for PCB masking and other high-temperature applications. Thick adhesive coating. Green, 4.0 mil thick.

  • Color: Green
  • Thickness: 3.6 mil | 0.091 mm
  • Backing: Polyester
  • Adhesive: Silicone/Rubber

3MCircuit Plating Tape 851 is a green polyester film tape with a unique conformable adhesive for printed circuit board masking during electroplating.

  • The low-stretch polyester film can be applied by machine or by hand.
  • The tape must be firmly pressed down by equipment with rubber-covered rollers or a rubber-covered platen press. Hand rolling usually does not provide enough pressure. A vivid outline of the circuit leads usually indicates adequate pressure was used.
  • Solvent clean-up of the board is recommended to facilitate subsequent soldering.
  • Note: Be sure to follow the manufacturer’s precautions and directions for use when using solvents.
3M 851
3M 851
3M 851
3M 851

3M 851 Features

  • Polyester backing reduces stretch and recovery of tape associated with uneven stop-off line
  • The thick adhesive coating reduces undercutting because adhesive blocks out solutions between fingers
  • The specially designed adhesive that generally performs better when no ovens are used to heat tape and boards
  • Polyethylene tape core instead of cardboard

3M 851 Applications

  • For masking printed circuit boards during solder stripping and precious metal plating of fingers.
  • Splicing of silicone-coated papers.

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