| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that in automotive tire is formed of rubber, synthetic rubber, sulfur, zinc oxide, carbon black, etc., harmful matters are diffused in the atmosphere to realize a part of atmospheric pollution if the tire is worn. SOLUTION: Tourmaline powder of the grain size of 0.3 micron to 0.3 mm is heat-sterilized and kneaded in a top tread of the tire, and diffused in a road and the periphery thereof as the tire is worn. |
