Determining Residual Torsional Energy Limits in Plied versus Alternate Feed Single Jersey Knits
Plied yarns neutralize torsional spirality within the strand cross-section, while alternate feeds distribute opposed stresses across alternating courses.
ISO 16322-2
Compliance Standard
International standardization protocols specify reliable testing procedures for calculating the twist or distortion of clothing after washing. Specifically, iso 16322-2 governs the determination of spirality in knitted and interlaced garments after laundering. The document provides clear guidelines for measuring seam displacement to assess garment quality.
It offers multiple calculation methods to accommodate different garment styles, including side-seam and seamless construction, which gives factories the flexibility required to test diverse product lines.
Garment Deformation
Laundering releases yarn tension and causes unbalanced knit structures to twist, forcing seams out of alignment. Utilizing iso 16322-2 allows clothing brands to quantify this skewness and prevent poorly fitting garments from reaching stores. Severe twisting makes apparel uncomfortable to wear and disrupts the overall silhouette.
Test Methodology
Testing technicians measure the angle of seam deviation against a vertical reference line on the garment. The standard iso 16322-2 requires averaging measurements from several washed garments to secure a representative value. This methodology ensures results are consistent across different laboratories.
Commercial Tolerance
Brands set specific tolerance percentages for spirality to maintain product reputation. Applying iso 16322-2 during quality audits protects retailers from customer returns due to twisted garments. Suppliers must adjust yarn twist or finishing methods if test results exceed allowed limits.