Cotton Fiber Length Distribution Metrics and Carded Yarn Quality
AFIS short fiber content by weight in raw cotton must remain below 8.5 percent to prevent severe mass variance and tenacity drop in carded yarn spinning.
Carding Fiber Breakage
Mechanical Degradation
The reduction in average fiber length during the initial combing and opening of raw cotton bales defines a critical efficiency loss in yarn preparation. Textile mill engineers monitor carding fiber breakage to assess the severity of mechanical action on delicate cotton lint. This phenomenon occurs prior to the drawframe drafting stage.
Process Impact
Heavy mechanical action from high-speed cylinder wires ruptures weaker fiber stems. High rates of carding fiber breakage generate excessive amounts of short fibers that accumulate as waste. Minimizing this damage ensures a higher yield of long, spinnable fibers.
Material Variables
Fiber moisture content and ginning quality determine the susceptibility of cotton to mechanical damage during opening and carding. If the moisture is too low, the dry fibers become brittle and break easily upon impact with the metal teeth. Therefore, adjusting the humidity of the card room helps prevent carding fiber breakage.
Maintaining a relative humidity of fifty-five percent creates optimal fiber flexibility.
Mill Calibration
Optimized settings on the carding machine balance the need for trash removal against the risk of fiber damage. Too tight a setting between the cylinder and flat wires increases carding fiber breakage while removing more trash. Technicians adjust these clearances to match the specific fiber length of each cotton batch.