Full definition
A conveyor belt whose tensile strength comes from one or more plies of woven textile fabric impregnated with rubber. Fabric types: EP (polyester warp/nylon weft — most common, good strength and low elongation), NN (nylon/nylon — high impact resistance, higher elongation), PP (polyester/polyester — low elongation), and cotton (obsolete for heavy duty). Classification: by number of plies and strength per ply per unit width (e.g., EP400/3 = 3 plies, 400 N/mm total breaking strength). Strength range: 160-3150 N/mm. Working tension: 8-10% of breaking strength. Elongation at working load: EP 1.5-2%, NN 2-3%. Top and bottom rubber covers protect the carcass: thickness 2-10 mm / 1.5-4 mm depending on application. Ply adhesion: minimum 3.5 N/mm per ISO 252. Per ISO 14890 and DIN 22102. Available in abrasion, oil, heat, fire, and food-grade cover compounds. Splicing: mechanical, cold, or hot vulcanized.