聚氨酯同步带又称PU同步带，也是很常见的材质，大多数由热塑性聚氨酯和高强度钢丝组成。热塑性聚氨酯这种材质具有很高的耐磨性，而内部的各种类型线芯能保证在其传动过程中能保持良好的运动能力。
Polyurethane synchronous belt, also known as PU synchronous belt, is also a very common material, most of which are composed of thermoplastic polyurethane and high strength steel wire. Thermoplastic polyurethane is a kind of material with high wear resistance, and various types of wire core can ensure that it can maintain good movement ability in the process of transmission.
开口的PU同步带传动可靠，尺寸也很稳定，在企业的生产过程中，在齿面或者背部添加一层尼龙就可确保在特殊应用中操作的特殊性不变，当然也可以在皮带背面添加一层厚厚的聚氨酯，可以有效的防止出现高腐蚀或者高负载的现象。
The Pu synchronous belt with opening has reliable transmission and stable size. In the production process of the enterprise, adding a layer of nylon on the tooth surface or back can ensure that the particularity of operation in special applications remains unchanged. Of course, adding a thick layer of polyurethane on the back of the belt can effectively prevent the phenomenon of high corrosion or high load.
橡胶同步带大多数都是采用日本进口的氯丁橡胶为主要原料，根据产品用途配上不同的辅料制成，骨架材料也是采用日本进口的玻璃纤维绳。玻璃纤维的强度层是由多股玻璃纤维在节点位置沿胶带宽度螺旋缠绕而成的绳索，优点是强度高、延伸率小、耐腐蚀、耐热等特点。总而言之，就是结实抗用！
Most of the rubber synchronous belts are made of chloroprene rubber imported from Japan as the main raw material, with different accessories according to the purpose of the products. The skeleton material is also made of glass fiber rope imported from Japan. The strength layer of glass fiber is a rope made of several strands of glass fiber spirally wound along the width of the tape at the node. It has the advantages of high strength, low elongation, corrosion resistance and heat resistance. In a word, it is strong and durable!
聚氨酯同步带：聚氨脂同步带一般以尼龙线(或钢丝、铜丝)作为抗拉体，聚酯浇注而成，具有耐油、耐冲击、美观等特点。
Polyurethane synchronous belt: Polyurethane synchronous belt is generally made of nylon wire (or steel wire, copper wire) as tensile body and polyester casting, which has the characteristics of oil resistance, impact resistance and beautiful appearance.
橡胶同步带：橡胶同步带屈挠性、耐磨性好，但PU不耐水.往复工作性差.高低温性能差。在常温静态条件下PU聚氨酯同步带好.反之橡胶同步带好。
Rubber synchronous belt: rubber synchronous belt has good flexibility and wear resistance, but Pu is not water-resistant, poor reciprocating performance and poor high and low temperature performance. PU polyurethane synchronous belt is better than rubber synchronous belt under static condition at room temperature.
至于哪一种同步带更加的好用就目前来说还没有界定的标准，根据自己的产品选择相应的材质合适自己才是好的。
As for which kind of synchronous belt is more convenient to use, there is no defined standard at present. It is good to choose the appropriate material according to your own products.
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