Greige Preparation Parameters for Heavy Woven Cotton Twill
Preparation of heavy cotton twill requires 85-degree flame singeing, dual-dip enzymatic desizing, open-width alkaline scouring, and 28 Baumé mercerization.
Open Width Continuous Processing
Fabric Handling
Material management method maintains the cloth in a flat, uncreased state as it moves through various treatment stages in a single production line. Mills utilize open width continuous processing to avoid the longitudinal creases and rope marks that can occur in winch or jet dyeing machines. This approach is essential for high quality synthetic fabrics and heavy cotton blends.
Mechanical Sequence
The machinery consists of a series of tanks for washing, bleaching, dyeing and rinsing, followed by drying units and heat setters. During open width continuous processing, the fabric travels at a constant speed, ensuring that every meter receives identical chemical exposure and temperature. Tension rollers and guiding systems keep the selvedges aligned to prevent bowing or skewing of the grain.
Tension Management
Production volume increases significantly when compared to batch methods. Maintaining the fabric in open width continuous processing allows for the application of uniform pressure at the padding nip, which results in even color distribution.
Production Efficiency
Chemical concentrations must be monitored constantly to account for the continuous replenishment of the liquor. Failure to control the feed rate in open width continuous processing leads to shade variations from the start to the end of the roll.