Point Density and Its Influence on Carding

Point density must be considered together with cylinder speed—the effective parameter is points per fibre per unit time. Low point populations can be partially compensated by higher cylinder speeds, though this may degrade some quality parameters. Higher point populations generally improve carding up to an optimum; above that, the effect becomes negative. Coarse fibres need fewer points (more space needed); finer fibres need more points (more fibres present at same throughput).