行驶系-汽车轮胎基础知识课件.pptVIP

标记解读 东风乘用车公司 湖北省武汉市经济技术开发区东风大道1969号 邮政编码：430058 Add: No.1969 Dongfeng Road，Wuhan Economic and Technological Development Zone, Wuhan, Hubei, China (430058) * 天然橡胶 胶树主要生长在东南亚、尼日利亚和南美洲国家。加入1%的醋酸和0.5%的甲酸，3-4H 以后凝结，压片机并清洗 八分之一英寸厚的。进一步处理，加入化学成份和人造橡胶。 丁苯橡胶SBR 和天然橡胶混合制造胎面。 聚丁二烯橡胶 和 丁苯橡胶混合及天然橡胶制造胎面，抗磨性较好。和天然橡胶混合制造胎壁，较好的弯曲性能。 COTTON 被用于早期的充气轮胎的帘布材料。 人造丝 抗张强度较好 RADIAL 帘布层 尼龙 又称聚酰胺。首先用于斜交线轮胎。抗拉伸的强度较差产生平斑磨损现象。汽车停置一夜。GC和PL常用。优点散热性好。 聚酯(POLYESTER) 轮胎胎体，没有平斑磨损现象。 钢丝 强度和抗热性能好。 玻璃纤维(Glass Fibre) 美国半途轮胎 芳族聚酰胺(Aramid) * First of all, what is natural rubber? Natural rubber belongs to the polymer family: these can be of natural or synthetic origin. The products are found in abundance everywhere: in plastic materials, film, fibres, protein or cellulose. Natural rubber belongs to the elastomer class. A feature of these substances is their high molecular weight. The molecules are in the form of linear chains or macromolecules. The basic unit is called a monomer. This is generally an organic product, often composed of carbon and hydrogen. The monomer in natural rubber is isoprene. The polymer is composed of long chains, the composition of which affects the properties. The longer the chain, the more regular and elastic it will be. All these units are placed in the same manner in the chain, which is why natural rubber is said to be 100% stereoregular (or 100% CIS). This is a property specific to natural rubber that synthetic rubber does not have. To link the chains together as regularly as possible, a molecular interlink is used, called chemical curing: this is vulcanisation. In fact, the more consistent the network formed by the chains, the better the elasticity. For centuries now, there have been numerous industrial applications for the properties of rubber. * Rubber was used by South American Indians who tapped it from a tree called the Hevea. Already in 1500 B.C. the Aztecs and the Mayas were using rubber in their everyday lives, notably to make balls for tlac