Material used for friction ply

Q.  Friction ply used in multiple-ply belts is made of ___________
- Published on 23 Sep 15

a. polyester cords
b. polyamide strips
c. synthetic strips
d. all of the above

ANSWER: synthetic strips


  • Sravanthi   -Posted on 05 Oct 15
    • Different types of materials such as leather, fabric, rubber and polyester or polyamide are used for belts.

    • Polyester or polyamide belts are made of multiple ply belts such as tension ply and friction ply. These two plies are made of different materials. Polyamide strips and polyester cords are generally used in manufacturing tension ply. Friction ply is attached to tension ply and is made of synthetic rubber. These belts need separate friction ply as they do not have high coefficient of friction.

    • Generally material used for belts should have high flexibility, durability, high coefficient of friction and strength. Tensile strength for polyamide belts is 400 – 600 N/mm2 and polyester belts have 700 – 900 N/mm2.

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