3M 851 Data Sheet
851 Greenback Printed Circuit Board Tape
Product Data Sheet
Updated : March 1996
Supersedes : October 1993
Product Description
Physical Properties
Not for specification purposes
Performance
Characteristics
Not for specification purposes
A green polyester film tape
with a special conformable
adhesive which resists
plating bath chemicals.
Adhesive Type
Backing
Thickness (ASTM D-3652)
Tape Colour
Shelf Life
Adhesion to Stainless
Steel ASTM D-3330
Special blend of Silicone
and Rubber
Transparent polyester
100 µm
Translucent green
12 months from date of despatch by 3M when stored in the
original carton at 21°C (70°F) & 50 % Relative Humidity
2.7 N/10mm
Tensile Strength
ASTM D-3759
Elongation at Break
ASTM D-3759
Temperature Range
Maximum
36.8 N/10mm
56 %
90 °C
Date : March 1996
851 Greenback Printed Circuit
Board Tape
2
Additional Product
Information
Application Techniques
Applications
Shelf life - important to
rotate inventory.
Low stretch polyester film
for machine, as well as
hand application.
Tape must be firmly
pressed down by equipment
with rubber covered rollers
or a rubber covered platen
Solvent clean-up of the
board is recommended to
facilitate subsequent
soldering.
press. Hand rolling usually
does not provide enough
pressure. A vivid outline of
the circuit leads indicates
adequate pressure was
used.
For masking printed circuit
boards during solder
Splicing of silicone coated
papers.
stripping and precious metal
plating of fingers.
FEATURES ADVANTAGES BENEFITS
Polyester backing.
Reduces stretch and
recovery of tape and
Saves money by reducing
number of reject boards.
associated uneven stop-off
line.
Thick adhesive coating.
Reduces undercutting
because adhesive blocks
Saves money by reducing
reject boards.
out solutions between
fingers.
Specially designed
adhesive.
Tape generally performs
Saves energy and labour
costs.
better when no ovens are
used to heat tape and
boards.
Saves money by reducing
Reduces adhesive transfer
clean-up time.
to printed circuit board.
3M is a trademark of the 3M Company.
Values presented have been determined by standard test methods and are average values not to be used for specification purposes.
Our recommendations on the use of our products are based on tests believed to be reliable but we would ask that you conduct your own tests to
determine their suitability for your applications.
This is because 3M cannot accept any responsibility or liability direct or consequential for loss or damage caused as a result of our
recommendations.
Specialty Tapes & Adhesives
3M United Kingdom PLC 1996
3M United Kingdom PLC
3M House,
28 Great Jackson Street,
Manchester,
M15 4PA
Customer Service :
Tel 0161 236 8500
Fax 0161 237 1105
3M Ireland
3M House, Adelphi Centre,
Upper Georges Street,
Dun Laoghaire,Co. Dublin,
Ireland
Customer Service :
Tel (01) 280 3555
Fax (01) 280 3509
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