- Automotive belts are manufactured from various materials built up in layers, adding both strength and flexibility to the belt. Each material and belt layer fulfils an important function. The
rubber compound is the bearing element of the belt and also forms the V-shaped cogs or ribs. The fibers are oriented at right angles to the direction of the belt rotation, providing a high degree
of longitudinal flexibility, yet maintaining a high transverse stiffness. In addition, the rubber compound is highly resistant to wear, oil, grease, etc. To act as a carrier layer for the rubber
compound, a fabric of woven synthetic fibers is used. This adds extra stability and provides greater resistance to wear. Also, the carrier layer prevents the back of the belt from cracking or
fraying. The tensile cords are the primary belt components that actually transmit power to the pulley. The cords are made form synthetic fibers - usually polyester. The cord material is carefully
selected for its load carrying ability. The tensile cords provide the high strength and low elongation properties required to absorb shock loads. A special adhesion rubber formulation
encapsulates the cord. This cushion layer laminates the various layers of fabric, tensile cords and rubber compounds, binding them together into a single strong working unit.
Automotive belts are manufactured from various materials built up in layers, adding both strength and flexibility to the belt.