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Description for 3M Lead Foil Tape 421
Backed with a rubber adhesive, offering excellent conformability in a variety of application conditions, very good conformability.Application Type Bond, Masking Material Form Tape Substrate Steel Industry Electroplating, X-ray plate masking Manufacturer 3M Chemistry Rubber Cure Method Pressure Sensitive Application Temperature (°F) >32 Color Dark silver Total Thickness (mm) 0.170 Single Sided Single Sided High Temperature Resistance (°C) 107 Low Temperature Resistance (°C) -51 -
Technical Data for 3M Lead Foil Tape 421
Overview
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Material Form
- Tape
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Substrate
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Industry
- Sporting Equipment - Add weight (balance) to equipment parts (golf clubs, tennis rackets, etc.)
- Electronics - Electroplating
- Industrial
- Medical - X-ray plate masking
- Other - Excellent conformability in a variety of application conditions, Radiation barrier, Moisture barrier, Chemical milling, Maskant during paint stripping
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Chemistry
- Other - Rubber
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Cure Method
- Pressure Sensitive (min) - Pressure Sensitive
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Color
- Gray - Dark silver
Specifications
Cure Specs
Application Temperature (°F) >32 Bond Strength
General Bond Strength (psi) 31 (oz./in.), 45 (oz./in.) Test Method Peel Strength (piw) 4.9 (N/cm) Test Method Tensile Strength (psi) 26.3 (N/cm) Test Method Tape Properties
Total Thickness (mm) 0.170 Single Sided Single Sided Material Resistance
High Temperature Resistance (°C) 107 Low Temperature Resistance (°C) -51 Conductivity
Electrical Conductivity (mhos/cm) Electrically conductive Thermal Conductivity (W/m°K) Thermally conductive, Good thermal properties Hardness
Elongation (%) 14 Test Method Flexibility Very good conformability, Excellent conformability Business Information
Shelf Life Details Store under normal conditions of 60° to 80°F (16° to 27°C) and 40 to 60% R.H. in the original carton. To obtain best performance, use this product within 18 months from date of manufacture. Shelf Life Temperature (°F) 60 to 80 Shelf Life Type From date of manufacture Shelf Life (mon) 18 -
Best Practices for 3M Lead Foil Tape 421
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Surface Preparation
Best results are obtained when applied to a clean dry surface above 32°F (0°C). Also, by “feathering” the edges – rubbing the tape down with a smooth-edged plastic piece (or similar object) – the tape can be made to better conform to the substrate. This is especially important if the tape is to be used as a “thief” in electroplating where the edges must fully contact the metal base.
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General Bond Strength Test Methods
General Bond Strength | Substrate | Test Method |
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31 (oz./in.) | Steel | ASTM D-3330, width |
45 (oz./in.) | Steel | ASTM D-3330, width |
Peel Strength Test Methods
Peel Strength | Type | Test Method |
---|---|---|
4.9 (N/cm) | 180° Peel Adhesion | ASTM D3330, c12 in/min (300 mm/min) |
Tensile Strength Test Methods
Tensile Strength | Test Method |
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26.3 (N/cm) | ASTM D3759 |
Elongation Test Methods
Elongation | Test Method |
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14 % | At Break, ASTM D3759 |