국산 재봉사 품질분석 결과

연조공정이 방적사의 불균제도에 미치는 영향(Ⅱ-2)

연조공정이 방적사의 불균제도에 미치는 영향(Ⅱ-1)

경량의 순모 니트사 ‘라나리아’

Global yarn choice

The Expofil Yarn Show in June 2002 is previewed-the full spread of yarns and textile fibres will be covered and the multi-sector and high-fashion content will remain unchanged. The international applications are discussed and 200 exhibitors representing 18 countries are registered. Independence has been chosen for Autumn/Winter 2003/2004,..

Failure mechanism in staple yarns

The failure mechanism in staple yarns is strongly influenced by yarn structure. Manufacturing methods impose certain constraints on the disposition and distribution of fibers in the yarn cross section. This paper investigates the failure mechanism in ring, rotor, air-jet, and vortex yarns. The yarns are subjected to uniaxial loading on a ..

Carded spinning of sticky cotton Part II: Stickiness effects on quality

Whereas Part I describes the effects of stickiness on productivity, Part II is devoted to an assessment of its impact on quality. Samples of sliver, roving, and yarn taken during the spinning process are examined to determine the effects of stickiness on product quality from the card to the spinning frames. The first effects of stickiness..

Predicting the Nep Number in Cotton Yarn -- Determining the Critical Nep Size

Researchers determined the critical nep size above which neps register as Uster testing machine yarn defects. The study assumed that yarn neps had a spherical shape. A model calculated critical nep size for cotton ring spun and open end spun yarns, and tests confirmed model results. The average size of neps larger than the critical size w..

Modelling of tension in yarn package unwinding

An improve theory for the variation of yarn tension during high speed over-end unwinding from cylindrical yarn packages based upon the theory of bent and twisted elastic rods is presented. A singular perturbation analysis is used to show that the effects of bending and twisting stiffnesses are confined to a boundary layer in the neighborh..

Variation of longitudinal modulus with twist for yarns composed of high modulus fibers

Variations of longitudinal and transverse moduli with twist for twisted yarns and twisted yarn-resin composite strands composed of fibers covering a wide range of tensile moduli are investigated using a sonic pulse propagation method. For twisted yarns composed of fibers relatively low in tensile modulus, the longitudinal modulus decrease..