Weihai Tiancheng Hualun special belt core Co., Ltd. produces PUGUANDE triangle belt, narrow V-belt and joint belt. The high polymer polyester tempered brown wire independently researched and developed by the company is used as the belt core of triangle belt, narrow V-belt and joint belt. Compared with the traditional fiber structure wire rope, the belt core is an integral solid core twistless structure, which is the world's first and exclusive. The United States, Japan and other countries began to research from the 1960s and 1970s It has not been successful until now. Compared with polyester soft rope, hard rope, aramid belt core triangle belt, narrow V-belt and joint belt, the triangle belt, narrow V-belt and joint belt produced with the belt core have the characteristics of no running length, fatigue resistance, balanced service life, no obvious elongation in the use process, especially suitable for the transmission device with strict requirements on length stability, with service life far exceeding that of Europe, America and Japan No secondary tension adjustment, maintenance free (20000-30000 hours), maintenance free rate of 97%.