^{3M Lead Foil Tape 420 (Linered) • 421}

^{3M 金屬鉛箔膠帶  420 (有透明襯膜)   421}

3M Lead Foil Tape 420 and 421 are backed with a rubber adhesive, offering excellent conformability in a variety of application conditions, indoors and out. 

• Very good conformability.
• Good thermal properties and will perform over a wide variety of temperature conditions (-60° to 225°F or -54° to 106°C). It has been used at higher temperatures for shorter duration.
• Electrically and thermally conductive.
• Can be die-cut into specific shapes.
• This material when disposed of separately is classified as RCRA hazardous waste. Please consult applicable Federal, State and local regulations for proper disposal.
• Elevated lead levels in water may result from long term submersion of this product.
• 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.

• Electroplating /• Radiation barrier / • Moisture barrier / • Chemical milling /• X-ray plate masking / • Masking during paint stripping / • Add weight (balance) to equipment parts (golf clubs, tennis rackets, etc.)

Backing: Lead foil

Color: Dark silver

Adhesion: Rubber (green)

Adhesion to Steel: tape 420 45 oz./in. width (49 N/100 mm)
　　　　　　　　tape 421 31 oz./in. width (34 N/100 mm)
Tensile Strength : tape 420 20 lbs./in. width (350 N/100 mm)
　　　　　　　　tape 421 15 lbs./in. width (263 N/100 mm)
Elongation at Break: tape 420 12%
　　　　　　　　　tape 421 14%
Backing Thickness: tape 420 4.7 mils (0.12 mm)
　　　　　　　　　tape 421 4.0 mils (0.10 mm)
Tape Thickness: tape 420 6.8 mils (0.17 mm)
　　　　　　　　tape 421 6.3 mils (0.16 mm)

Weight: tape 420 0.075 lbs./yd./in. width (0.0375 kg/m/24 mm)
　　　 tape 421 0.06 lbs./yd./in. width (0.034 kg/m/24 mm)
Liner Thickness: tape 420 3.5 mils (0.09 mm)
Temperature Use Range: -60° to 225°F (-54° to 106°C)
Water Vapor 0.1g H2O/100 sq. in./24 hrs.
Transmission Rate: (1.55 g/m2/24 hrs.)
Std. length: 36 yds. (33 m)

Electrically Conductive
“Thieving” action eliminates metal plating edge build-up.

Acid Resistant
Broad applicability for etching, milling and plating operations.

Malleable
High conformability: can be easily worked with burnishing tools.

High Density
Ideal weighting or balancing medium.

X-ray Opacity
Help protect components from x-rays. Great marker or locator for x-ray inspection operations.
 

金屬鉛箔, 用作電磁射線干擾屏蔽、可阻絕X光

高密度 具荷重或平衡媒介高爾夫球杆 網球拍平衡用

高延展性 高伏貼性