Friction induced heat can seriously affect the strength of synthetic ropes. The temperatures at which 50% strength loss can occur are: polypropylene 250°F, nylon 350°F, polyester 350°F. When using rope where the temperature exceeds the levels (or is too hot to hold), consult the manufacturers recommendations as to the size and type of the rope for the proposed continuous heat exposure conditions.

High temperatures can be achieved when surging rope on a capstan , checking ropes on a cable, running over stuck or non-rolling sheaves or rollers. Each ropes construction and fiber type will yield a different coefficient of friction reluctance to slip in a new and used state. It is important to understand the operational demands and insure the size.

When the rope is first put into service the outer filaments of the rope will quickly fuzz up. This is the result of these filaments breaking and this roughened surface actually forms a protective cushion and shield for the fibers underneath. This condition should stabilize, NOT PROGRESS. If the surface roughness increases, excessive abrasion is taking place and strength is being lost. As a general rule for braided ropes, when there is 25% or more wear from abrasion the rope should be retired from service.