Keywords:Radiation shielding, Transcendental glass, Tungsten, Cloth, Gamma-ray, Sol-gel method, Radiation shielding wear, Crimping process
After the Great East Japan Earthquake, Iwamiya was concerned about the development of radiological shielding wear using her silk glass technology to coat glass on Japanese paper for making a polygonum filiforme “mizuhiki”. This technology is characterized by a chemical reaction technique based on the sol-gel method for glass, and by excellent bonding-ability of glass to both organic and non-base inorganic materials selected as a combination according to their application. In this time, a combination of tungsten powder and fabric was selected. A stable radiation-shielding cloth was produced through processes of mixing the powder into transcendental glass liquid, coating them on the fabric and heat treatment. By further crimping a soft shielding cloth, it became excellent in flexibility and better shielding properties. The radiation shielding property was equivalent to lead. A desired a half-weighted and more movable radiation shielding wear compared with the conventional one was successfuly made by using the three-fold crimped cloths.