| 摘要 |
<p>// The chafer strips of a vulcanized tire contain from about 2 to 12 phr of an incompatible and migratory oil or wax having ester groups and possibly hydroxyl groups and carbon-to-carbon unsaturation which blooms to the outer surface of the chafer strip to form a lubricating film providing the tire with self-lubricating beads. A tire having such a bead facilitates mounting or demounting of tires where the recommended lubrication procedures have not been followed.</p> |
