851 Greenback Printed Circuit Board Tape Product Data Sheet Updated : March 1996 Supersedes : October 1993 Product Description A green polyester film tape with a special conformable adhesive which resists plating bath chemicals. Physical Properties Adhesive Type Backing Special blend of Silicone and Rubber Transparent polyester Thickness (ASTM D-3652) 100 m Tape Colour Translucent green Shelf Life 12 months from date of despatch by 3M when stored in the original carton at 21C (70F) & 50 % Relative Humidity Adhesion to Stainless Steel ASTM D-3330 2.7 N/10mm Tensile Strength 36.8 N/10mm Not for specification purposes Performance Characteristics Not for specification purposes ASTM D-3759 Elongation at Break 56 % ASTM D-3759 Temperature Range Maximum 90 C 2 Date : March 1996 851 Greenback Printed Circuit Board Tape Additional Product Information Shelf life - important to rotate inventory. Application Techniques Low stretch polyester film for machine, as well as hand application. Solvent clean-up of the board is recommended to facilitate subsequent soldering. Applications 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 indicates adequate pressure was used. For masking printed circuit boards during solder stripping and precious metal plating of fingers. Splicing of silicone coated papers. FEATURES ADVANTAGES BENEFITS Polyester backing. Reduces stretch and recovery of tape and associated uneven stop-off line. Saves money by reducing number of reject boards. Thick adhesive coating. Reduces undercutting because adhesive blocks out solutions between fingers. Saves money by reducing reject boards. Specially designed adhesive. Tape generally performs better when no ovens are used to heat tape and boards. Reduces adhesive transfer to printed circuit board. Saves energy and labour costs. Saves money by reducing clean-up time. 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. 3M United Kingdom PLC 1996 Specialty Tapes & Adhesives 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 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: 3M: 851-2x144 851-1/2x144 851-1"x72yds 851-4x72 851-3x72 851-1/2"x72yds 851-3/4"x144yd 851-11/2x144