High-density composite material
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United States of America Patent
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Dec 4, 2007
Grant Date -
Jan 6, 2005
app pub date -
Sep 30, 2002
filing date -
Sep 28, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A composite material which comprises an elastomer or vulcanized rubber and particles of a high-density material, such as tungsten, evenly dispersed therein, wherein the contents of the elastomer or vulcanized rubber and the high-density particles are 35 to 50 vol. % and 50 to 65 vol. %, respectively, based on the whole composite material, and the high-density particles have a particle composition comprising 60 to 80 vol. % coarse particles having a particle diameter of 10 to 100 .mu.m, 10 to 20 vol. % medium particles having a particle diameter of 3 to 6 .mu.m, and 10 to 20 vol. % fine particles having a particle diameter of 1 to 2 .mu.m, the spaces among the coarse particles being filled with the medium particles and fine particles. The composite material is excellent in flexibility and processability and is suitable for use as a radiation-shielding sheet material, weight member, vibration-damping material, balancing member, radiating material, and shot material.
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