Full definition
Conveyor belts are essential components in material handling systems, designed to transport bulk materials or unit loads efficiently across varying orientations, including horizontal, inclined, or declined paths. They consist of a continuous flexible loop that operates over a framework of drums, idlers, and supporting structures. The selection of a conveyor belt is critical as it influences the overall efficiency and cost-effectiveness of the system. There are two main categories of conveyor belts: heavy-duty and light-duty. Heavy-duty belts are typically reinforced with materials such as textile (e.g., EP, NN) or steel cords, making them suitable for rugged applications in mining, quarrying, cement, and bulk handling. These belts can have tensile strengths ranging from 160 to 10,000 N/mm and are available in widths from 400 mm to 2,200 mm, accommodating substantial loads and harsh operational conditions.
On the other hand, light-duty conveyor belts are designed for applications such as food processing, packaging, airports, and logistics. These belts usually feature covers made from PVC, PU, silicone, or PE over a substrate of polyester or cotton fabric, typically comprising 1-4 plies. Light-duty belts prioritize hygiene and flexibility for diverse applications but do not possess the same load-bearing capacity as their heavy-duty counterparts. The choice of the belt directly impacts the total system cost, with belts representing approximately 30-50% of the total conveyor system cost. Key factors influencing the selection process include the type of materials being handled, conveyor length, lift height, environmental conditions, and compliance with relevant regulatory requirements.
Standards play a significant role in the design and manufacturing of conveyor belts. For heavy-duty belts, ISO 14890 specifies the requirements for rubber covers, while ISO 15236 outlines standards for steel cord belts. Additionally, DIN 22102 covers the specifications for textile conveyor belts, and CEMA’s 7th Edition provides guidelines for design considerations. Major global manufacturers of conveyor belts include Continental, Bridgestone, Yokohama, Fenner Dunlop, Sempertrans, and Bando.