日本神户制钢所开发了用于大深度地下掘削等的掘削机钻头的轴承。它采用了CFRP(碳纤维增强塑料)材料。采用CFRP材料后,可防止掘削操作时产生的高频金属噪音和金属粉尘的飞散。当前先以地基较软的关东地区为中心进行市场开拓,将来则将开发适应于砾层或砂层等难掘削地基使用的品级,并在全国广泛推广。 该公司所开发的CFRF制轴承,是由酚醛树脂为主成分的聚合物合金中混入长度为25mm以上的碳纤维、高强力纤维及具有润滑功能的添加剂,通过压缩成型法成型的。通 Japan’s Kobe Steel has developed a deep underground drilling and other mining machine drill bit bearings. It uses CFRP (carbon fiber reinforced plastic) material. The use of CFRP material prevents the generation of high-frequency metal noise and metal dust generated during excavation operations. At present, the market is mainly open to the relatively soft foundations of the Kanto region. In the future, it will be developed to a grade that is suitable for the use of hard-to-excavate ground such as gravel or sand and is widely promoted throughout the country. The CFRF bearings developed by the company are made of a polymer alloy containing a phenolic resin as a main component, carbon fibers having a length of 25 mm or more, high-tenacity fibers, and lubricity-imparting additives molded by compression molding. through