Covers of natural or synthetic rubber are used in Conveyor Belt production to save base Carcass from wear, impact, deterioration and other influences. They are compounded to meet particular service conditions as Bras ion, Oil, Heat, Flame, Chemical Resistant and Antistatic, Etc. cover type, quality and thickness are matched to service life of belt involved.

Cover formulation for Belt manufacturing is determined by material to be carried and environment in which belt will operate.

This consists one or more plies of textile fabric with rubber on each side to give adhesion and flexibility. Commonly used fabrics are, Nylon, Polyester and Cotton. Strength to move loaded belt and absorb the impact of impinging material being loaded into Conveyor Belt.

Extra layer compound between plies is called Skim Coat. These are contributors to Internal Adhesions, Impact Resistance and play a significant role in determining belt load support and trough ability. Improper Skims can adversely affect belt performance and lead to ply separation.

A special woven fabric between cover and carcass improves cushioning, the gouging and tear resistant properties of cover rubber and protects Carcass from Impact damages. This construction is recommended for use in belts handling primarily crushed and sized material which gives severe impact to belt when lumps drop at a loading point.