| 摘要 |
PROBLEM TO BE SOLVED: To simply and correctly check presence/absence of occurrence of volumetric expansion of hollow particles filled in a safety tire under the pressure, and the degree of occurrence thereof. SOLUTION: In a safety tire in which a large number of thermally expandable hollow particles 4 consisting of continuous phases made of resin and closed cells surrounded thereby are sealed in a tire air chamber 3 demarcated by the tire 1 and a rim 2 while the tire 1 is mounted on the rim 2, hollow particles 4 in a tire before travel and in a used tire are respectively sampled, the particle size distribution of the hollow particles 4 of the predetermined amount is measured, the results of measurement is compared with each other, and acceptance/rejection of the hollow particles 4 in the used tire is determined. COPYRIGHT: (C)2006,JPO&NCIPI
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