Heavy-caliber conveyer belt

The invention relates to a heavy-caliber conveyer belt. The heavy-caliber conveyer belt comprises a fabric layer and a polyurethane coating, the warps and the wefts of the fabric layer are modified polyester industry yarns, the modified polyester industry yarns are prepared from modified polyester, the modified polyester is composed of polyester and aminoadipic acid gylcol ester, the aminoadipic acid gylcol ester is dispersed among molecular chains of the polyester, hydrogen-bond interaction exists between the aminoadipic acid gylcol ester and the molecular chains of the polyester, and the relative position of the aminoadipic acid gylcol ester and the molecular chains of the polyester is fixed; the free volume space among the molecular chains inside the fiber is increased by 20-40v/v% when the modified polyester industry yarns are at 100-150 DEG C, polyurethane can form a firm resinoid coating on the surface of the fabric layer when the modified polyester industry yarn is subjected to heat treatment process, and the polyurethane coated fabric and the polyurethane have good interface bonding effect; and the heavy-caliber conveyer belt is mainly used for delivering high pressure water.