轮胎是橡胶制品,它在保管过程中,往往因受热或日晒而发硬、发脆,以致龟裂,甚至机械性能大大下降,失去使用价值,这种现象称为老化。日光直接暴晒还会使轮胎软化变形。目前一些单位,特别是农机供应部门的轮胎库存量相当大,绝大多数是露天存放,堆放方式也不符合要求,不但是平放,而且叠高十层之多,因此轮胎老化很快。如我省在夏季阳光下存放轮胎,仅仅一个月就产生老化,三个月就有明显裂纹。因此,必须引起我们的重视,在轮胎保管和包装上应做到: Tires are rubber products. During storage, they tend to be hard and brittle due to heat or sun exposure. Cracks and even mechanical properties are greatly reduced and the useless value is lost. This phenomenon is called aging. Direct exposure to sunlight will soften the tire deformation. At present, some units, especially the farm machinery supply department, have quite large inventories of tires. Most of them are stored in the open air and their stacking methods do not meet the requirements. They not only lay flat but also stack up as many as ten layers so that the tires age rapidly. Such as our province in the summer sun store tires, only a month to produce aging, there are obvious cracks in three months. Therefore, we must draw our attention, in the tire custody and packaging should be done: