Roller Surface
Elastomeric covers provide the necessary friction and cushioning for the drafting of fibres in a spinning frame. Synthetic cot degradation occurs when the surface of these rollers hardens or develops grooves due to constant pressure and chemical exposure. This physical change reduces the ability of the roller to grip the flax fibres.
Regular inspection is required to identify the early signs of wear.
Friction Loss
Smooth and consistent contact is necessary for the uniform attenuation of the yarn. As synthetic cot degradation progresses, the coefficient of friction becomes uneven across the roller surface. This instability leads to increased yarn hairiness and a higher frequency of breaks.
The presence of spinning oils and moisture from wet spinning accelerates the breakdown of the polymer.
Replacement Cycle
Maintenance schedules are based on the expected lifespan of the rubber compounds under specific operating conditions. Mills that ignore synthetic cot degradation face major losses in productivity and quality. Grinding the surface can extend the life of the cot, but eventually, the material must be replaced.
Proper storage of spare parts in a cool environment prevents premature aging of the synthetic material. Technicians often use a Shore durometer to measure the surface hardness and determine if the cot has reached the end of its useful life.
