Tungsten Polymer Shielding Properties

Tungsten polymer shielding is made of tungsten powder and polymer, tungsten polymer enjoys many excellent properties or special characteristics such as high density (≥11.34 g/cm3), perfect radiation shielding performance, good flexibility, excellent workability and perfect environmental suitability.

The main properties are as follows:

1.Provides approx. 75% attenuation as compared to solid lead

2.Attenuation of 175% compared to a high density lead blanket

3.Priced competitively to lead for many applications

4.Available as a blanket, ribbon wrap or molded shapes; flexible or rigid

5.Cut materials to fit without needing to seal edges - no residue

6.Included fasteners, grommets, locking devices, etc.

7.Improved fit-up --- molded applications typically will yield much higher reduction factors - less weight with same impact

8.Tested to 550°F/288°C

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Tungsten Polymer Shielding Applications

Tungsten polymer shielding applications are so many and could work as lead alternatives as its high density and excellent radiation absorption.

Typical shielding densities approaching twice that of high density lead blankets with similar thickness. The new shielding material, which is tungsten polymer, with highly flexible and can be molded/formed into any shape. Tungsten polymer is a composition of various resins and tungsten powder which are mixed together through special metallurgical technology. The resins may include ABS (acryloynitrile butadiene styrene), PP (polypropylene), PBT (polybutylene terephthalate), PA (polyamide), PU (polyurethane), TPE (thermoplastic elastomer), etc. This material often is considered as lead alternatives.

The main of Tungsten polymer shielding applications:

Maximized the shielding impact, particularly in tight spaces

Offering ease of installing and securing

Integral securing straps included

Greatly increased shielding effectiveness by custom profiling the shield relative to the "hot spot" or radiation source

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Tungsten Radiation Shielding Machining

High-density tungsten radiation shielding is extremely strong and durable (typical hardness ranges from 24-32 RC), so it has a good machinability. Tungsten has low-thermal expansion rate and resistance to breakage and chipping allow you to achieve very close tolerances and hold fine finishes.

There are some main machining processes for tungsten radiation shielding:

Turning: Positive rake tooling is suggested. Seco triangle inserts TPG432 or TPG431 grade 883.

Drilling: Carbide tooling is suggested. Increased clearance angles and automatic feeds are often used to avoid binding and seizing. Carbide drills will give a better tool life.

Milling: Premium uncoated end mills with a regular spiral such as SGS. Insert cutters; use square multi-edge or single edge cutters, such as KC730. Also can use positive rake octagon cutters, such as Seco grade 883.

Cutting: When sawing, use a bi-metal blade; blade pitch should be relative to the thickness of the material. Material can also be cut using high-speed abrasive cutoff wheels.

Threading: when it needs to be assembled, thread is required. Carbide tool is suggested.

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Tungsten is Good Choice for Radiation Shielding

Unlike lead, tungsten material could reduce the size and volume to have the same radiation absorption as lead.

As we know, tungsten is widely used for radioactive source containers, gamma radiography, shields and source holders for oil-well, logging, and industrial instrumentation, because of its high density, much denser then better radiation absorption. Therefore, tungsten is also popular for medical radiation shielding such as used in cancer therapy, as well as syringe protection for radioactive injections, etc.

When you need to direct a specific amount of radiation to a targeted area, tungsten provides the control you need even under extreme, high-heat conditions.

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