Some of the physical things that will be considered when analyzing a belt:
1. The compound or fiber of which the belt is made
2. The strength of the belt
3. Minimum pulley diameter that can be used
4. FDA or USDA approved
120 = 120 Lbs. Working Tensile Strength per inch of belt
5. Temperature Range
6. Coefficient of friction
As to the composition of the belt, there are two basic parts: The Cover and the Carcass
1. The top cover is there to protect the lower portion (carcass) of the belt or to provide a specific conveying surface.
A. PVC (poly vinyl chloride) (resists: animal fat, vegetable and mineral oil)
B. Neoprene (resists: oils)
C. Polyurethane (resists: oils and abrasions)
D. Silicone (resists: heat and cold)
E. Teflon (resists: sticky materials)
F. Rubber (resists: cold and water)
G. Nitrile (resists: all oils)
H. Kevlar (resists: heat, mildew, and chemicals)
2. The carcass is the fabric or cords that make up the strength of the belt. The carcass can be made of multiple piles or interwoven with various fabrics for added strength. These piles or weaves are made of various fabrics, mainly synthetic materials.