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0.02mm lead foil (i.e. 20 microns) is an extremely thin lead material that, due to its lack of self-supporting properties, is usually compounded on polyester film as a lead foil intensifying screen. It is the core consumable for industrial X-ray inspection, placed on both sides of the film: the front screen (0.02mm) uses secondary electrons to significantly reduce exposure time, while the back screen is responsible for absorbing scattered light to improve imaging clarity. In addition, it is also used in laboratories to shield low-energy soft X-rays or as a precision counterweight. When using, it is necessary to strictly prevent wrinkles and scratches to avoid producing artifacts; Do not consider it as the main shielding layer for high-energy gamma rays. Gloves should be worn during operation to avoid direct contact, and waste should be treated as heavy metal hazardous waste.
Parameter | Details |
Material | High-purity lead foil ( purity ：96% ， 97% ，98% ，99% ，99.9% ，99.99% ，99.999% ) |
Thickness Options | 0.02mm , 0.022mm ， 0.025mm , 0.0275mm , 0.03mm , 0.04mm , 0.05mm , 0.1mm , 0.12mm , 0.15mm , 0.18mm , 0.2mm , 0.25mm , 0.3mm |
Specific Gravity | 11.345 g/cm³ |
Processing Performance | High plasticity, easy to cut, bend, and shape |
Biocompatibility | Suitable for medical contact applications |
Corrosion Resistance | Resistant to acids, alkalis, and moisture |
Radiation Shielding | Effective against X-rays and gamma rays |
Application Temperature | Adaptable to normal working temperatures (avoid extreme high temperatures) |
0.02mm lead foil alone cannot do the main shielding (too thin), but it is very common to use it as an auxiliary/local shielding:
1.Package radioactive sample vials, calibration source → attenuated low-energy gamma and soft X-ray leakage
2.Gap filling: Lead door frame sealing strip lining, edge shielding of equipment holes
3.Temporary obstruction: Lay a layer of lead tape on the laboratory countertop (the internal carrier is often thin lead foil) to prevent the floor/countertop from being exposed to light
4.Multi layer composite structure: a uniform thin layer of flexible lead curtain/lead apron sandwiched between rubber, plastic or fabric
Clamp the lead foil tightly against the film on both sides:
1. Front screen (facing the radiation source side): The thickness is usually 0.02-0.03mm. When the radiation hits the lead foil, it excites secondary electrons, making the film quickly photosensitive and greatly reducing the exposure time
2. Rear screen (closely attached to the back of the workpiece): slightly thicker (~0.1mm), mainly used to absorb scattered lines from the back and workpiece, reduce fog, improve image contrast and clarity
Simply put, the front screen increases sensitivity and accelerates exposure, while the back screen blocks scattering and improves clarity
Chemical anti-corrosion lining
Lead has good sulfuric acid resistance, and extremely thin 0.02mm lead foil can be used for small area repairs/transition layers
0.02mm lead foil is bonded in the middle of composite materials as a high-density constrained damping layer to suppress thin-walled resonance (commonly used in precision instruments/aviation interiors)
Density of 11.34 g/cm ³, can adjust the center of gravity with a very small volume, used for precision balancing of sensors, rotors, etc
Hair black is a lead oxide layer formed by normal oxidation. As long as it does not fall off, it does not affect the sensitization/protection effect, but can prevent further oxidation without wiping. The thinner it is, the more it is wiped
There is no clear shelf life, as long as there is no oxidation, slag, wrinkles or holes, it can be used. It will not significantly decrease in performance after being stored in a dry and cool environment for 3-5 years. Just wipe off the surface dust before use.
Absolutely not, when using lead foil for radiation shielding, other metal foils cannot be used as a substitute, as it cannot completely block scattered radiation and is considered a violation of regulations.
