Calculating Loom Reed Width and Warp End Density for Plain Weaves
Derive loom reed width by compounding greige take-up and wet finishing contraction percentages onto target cuttable width while balancing dent air space ratios.
Rotor Spun Yarn
Textile Structure
Open-end textile structures are produced by collecting individual fibers in a rotating groove and twisting them into a continuous strand. Rotor spun yarn is characterized by a distinctive core-and-wrapper structure where the inner fibers are more parallel than those on the surface. This mechanical method offers higher production speeds than traditional ring spinning.
The resulting thread possesses a more uniform diameter compared to yarns made through the drafting and twisting of a ring frame.
Spinning Physics
Centrifugal force deposits fibers into the rotor circumference during the spinning process. As the yarn is pulled from the center, the rotation of the rotor imparts the necessary twist. Rotor spun yarn lacks the spiral fiber path of ring yarn, which alters its physical performance.
Physical Property
Properties include high abrasion resistance and a fuller, more opaque appearance. While the tensile strength is generally lower than ring-spun equivalents, rotor spun yarn provides excellent uniformity and fewer thin spots. These characteristics make it suitable for denim and heavy knits.
Commercial Application
Applications prioritize this material for high-volume basics. The efficiency of the process reduces the cost per kilogram of the finished thread. Most modern mills use this technology for medium to coarse yarn counts.