The V belt under trial of polyester steel  wire has proven qualified for nine indicators after being tested by Qingdao Oil and Chemical Industrial New Materials and Products Quality Supervision and Examination Center based on the GB12732-1996 standards, and the results are all higher than the national standards, especially in the fatigue life test in which the result is almost five times higher than national standard, running 400 hours with the belt body still intact. (Test report attached) 　Qingdao Sixth Rubber Triangular Belt Factory used polyester steel wire to make ordinary rubber V belt, which passed the fatigue test exceeded with a result two to three times higher than the national standard, running for four and hundred hours with the body intact until the test was terminated. (can still keep running). 　　　The 4L5V-5000 PUGUANDE oilfield jointed belt made of polyester brown wire was tested in Liaohe Oilfield, Daqing Oilfield and Shengli Oilfield. PUGUANDE oilfield jointed belt averagely runs for more than 12 months (more than 9 months). Compared to similar international products, the service life of the belt body is 3-5 times higher. It solves the technical problems of the conveyor belt‘s susceptibility of to stretching in oilfield area, slipping, loss in transmission, low transmission efficiency, huge consumption of electricity, severe damage in rainy and snowy weather, short service life, uneven service life and impossibility for corporate to replace regularly. 　 　In September 2010, Beijing polyester steel  wire new type reinforcing materials expert evaluation conference was held. Experts at the conference highly acknowledged the excellent quality and high-standard performance of polyester steel brown wire (conference content). Polyester steel brown wire is a leap of quality in rubber reinforcing materials, revised the hundred-year-history of rubber reinforcing materials and rubber transmission belts and is a new milestone in the world’s rubber industry. 　　Polyester steel brown wire uses new technology, new process and new devices for production. It’s a highly efficient, low consuming, energy saving and environmental protecting product. It meets with the world’s requirement of emission reduction,