Staple Length against Pilling Life in a Combed Cotton Order
Combing long-staple cotton to eighteen percent noil suppresses short fibers below six percent, locking ends into yarn cores to secure Grade 4 pilling life.
Zweigle S3
Hairiness Measurement
Optical testing devices are used to count the number of protruding fibres of different lengths on the surface of spun yarns. The value known as the zweigle s3 represents the total number of hairs that are three millimetres or longer per hundred metres of yarn. This specific count is a critical parameter for predicting yarn behavior in subsequent processing.
Optical Sensing
Light beams are projected across the path of the moving yarn to detect the shadows cast by the protruding fibre ends. In the operation of a zweigle s3 system, the sensor array differentiates between short fuzz and long hairs by measuring the height of each protrusion. This classification is automated to ensure high-speed analysis of yarn samples during quality control.
Quality Assessment
Long hairs are the primary cause of yarn clinging and warp breaks during high-speed insertion on shuttleless looms. A low zweigle s3 value indicates that the yarn will run smoothly and produce a fabric with a clean, pill-resistant surface. Sourcing mills use this metric to benchmark their compact spinning systems against traditional ring frames.
This numerical evaluation helps maintain consistent fabric aesthetics across different production batches. It provides a more reliable prediction of fabric pilling than the total hairiness index, which includes very short hairs that do not contribute to tangle formation.
Measurement Limitations
High yarn speed and uneven tension during testing can sometimes cause the strand to vibrate and distort the optical readings. To avoid this, the test must be performed under standard tension in a temperature-controlled laboratory. This ensures that the measured hairiness represents the true structural state of the yarn.