Earlier years the production of polyurethane synchronous belt, skeleton material generally adopts copper coated steel wire, because this kind of widely used in tires, rubber hose, skeleton material strength is higher, and plentiful. But made of steel wire as skeleton material synchronous belt after using the elongation, synchronous belt pitch elongation, lead to bad with gear, skip, damage of belt soon. Analyze the causes, and may be a small steel wire of the initial modulus, the tensile deformation is in operation. Steel wire and rubber adhesive are the other disadvantages of poor, vulnerable to spare; Steel wire is easy to rust in humid environment, easy and rubber debonding; The nonuniformity of wire and also tend to cause deformation of tape or wandering. All of these factors accelerate the damage of the synchronous belt. Because the wire do skeleton materials can't meet the application requirement of synchronous belt, need to find new skeleton material. With the development of industrial technology, drawing, twisting, post-processing of glass fiber manufacturing process improvements, such as glass fiber cord made good performance, it has a high tensile strength, modulus, good heat resistance, good dimensional stability, small elongation, than steel wire and rubber adhesive, etc. Compared with steel wire synchronous belt, glass fiber rope synchronous belt can work in any climate, will not rust in wet conditions. In order to improve the resistance of glass fiber rope adhesive performance of the flexible and with rubber, butadiene, styrene, butadiene pyridine ternary copolymer latex or with chloroprene latex blend to impregnated glass fiber rope J. Made of glass fiber rope synchronous belt can basically meet the requirements of the current automotive and general industrial drive. But glass fiber rope also has many shortcomings, such as brittleness, and not twists and turns and resistance to impact load stability is poor, which often cause the use of synchronous belt to reduce reliability. Had someone with polyester, such as carbon fiber cord to try the synchronous belt tensile body material, the effects are bad. In recent years began to adopt synchronous belt of aramid cord do skeleton material. Aramid fiber has the following advantages: compared with other commonly used skeleton material density is only one 5 of the steel wire, half of the glass fiber; Under such as weight, the strength of steel wire 8 times, 3 times of fiberglass, modulus is about 2 times of the steel and glass fiber; Under the same volume, the strength of aramid fiber, estimated at 50% more than the steel wire and the glass fiber modulus than the steel wire is small, but slightly higher than glass fiber. But the elongation at break of aramid fiber is higher than wire, slightly higher than glass fiber. The performance of aramid mainly by the macromolecular structure of high crystallization and high orientation. The tensile property of aramid fiber, bending performance, reverse all performance indicators were higher than the traditional synchronous belt skeleton material, it is bigger than intensity and density of small, this to improve the bearing capacity of the synchronous belt, reduce the weight of the synchronous belt, synchronous belt good runtime special centrifugal force and vibration. Aramid high modulus, low elongation and creep to synchronous belt have good dimensional stability, not elongation in use. Aramid high temperature resistant, zui high temperature can reach 240 ℃, 160 ℃ after 500 h under strong little drops, so is a good material for making synchronous belt. Now people have aramid 1414 as a skeleton materials used in synchronous belt. In addition, the United States of the Dow Chemical company will also polyimide ( P84) Fiber and polystyrene and imidazole ( PBI) Fiber synthetic fiber such as synchronization for wear, just because of price reason, has not been popularized. Expect the aramid fiber and these two kinds of fibers will be synchronous belt skeleton material select material in the future. Tags: triangle triangle agent manufacturers polyurethane PU synchronous belt