THE CHEMISTRY OF TIRE-BUILDING.

Evening Post, Volume CVI, Issue 142, 13 December 1923, Page 18

THE CHEMISTRY OF TIRE-BUILD-ING.

The story of the making of a tire does not end with rubber and cotton. As a matter of fact, a tire made of pure rubber wouldn't stand up long enough to ibe worth mounting on the run. A news eheet published by a Canadian tire company _ mentions that, to give life and wearing qualities to tires,. between 40 and 50 compounding ingredients are commonly used in their manufacture. First, of.course, comes sulphur, for) as most people know, it was early discovered that rubber, plus sulphur, plus heat would vulcanise. The discovery really majde possible the present widespread commercial use of rubber. Other imj.jportant ingredients used in tire production are: Lime, mica, resin, clay, glue, lead, litharge, abestine, aniline oil, petroleum, and benzol. Then there is caustic: soda and sulphuric acid, which are •used in the reclaiming, mill. In an analysis made by- eminent chemists of the ingredients used in the manufacture of pqpular car tires, it. has been observed that the materials are assembled from practically every country in the world, carefully tested and scientifically blended to; produce tires of universal adaptability t<> service and maximum quality.