Modeling and studying yarn dynamic behavior

The first section of this paper presents the objectives of our research team in investigating fabric modeling. We show why it is necessary to model yarns before modeling fabrics. In order to integrate the yarn model into the fabric model, we define an adapted yarn geometry, then we describe the yarn model. This model is a system of juxtap..

A generalized micromechanics of continuous-filament yarns part I: Underlying formalism

A constitutive theory is proposed to predict the stress-strain behavior of a twisted filament yarn under extensive elongation from the structural parameters and constituent moduli. This theory can predict the radial distributions of local stress and strain as well as the load-elongation relation, if the initial distributions of the local ..

편성사의 신제품 개발

아사히 가세이, 새로운 중공 필라멘트 트윈 에어를 개발

Spun Yarn Structures and Properties

A bundle of thin and long bodies may be assembled into a single elongated yarn of specified length if the fibers in the bundle overlap in a staggered configuration so that tensional forces are transmitted from fiber to fiber and thus distributed within the bundle, and the number of individual fibers is large enough to ensure that disconti..

False-Twist Process.

Polyester yarns account for the majority of false twist textured yarns. The simultaneous actions of drawing (stretching), heating, and twisting on the filament bundle improve the tensile and tactile properties of continuous filament partially oriented yarns. Winding the yarn on a bobbin after untwisting results in high elasticity. Heating..

Air-Jet Texturing and Yarns.

Turbulent compressed air forms loops on the surface of air jet textured yarns and imparts a voluminous character. The loop structure confers properties that resemble those of conventional staple yarns. Basic air jet texturing machines consist of a yarn supply in a creel, a winding head fitted with yarn transport, an extra pair of feed rol..

Yarn Texturing Technology.

An overview of yarn texturing technology addresses twist texturing, jet screen texturing, bulk continuous filament yarns, air jet texturing, heat setting, twisting mechanisms, structural mechanics of twisted yarns, false twist texturing, bending, buckling, variability, drawtexturing machines, package dyed yarns, worker safety, modificatio..

False-Twist Textured Yarns

A overview of yarn types and yarn modifications possible via false twist yarn texturing addresses modifying yarn denier by controlling draw ratio, manufacture of combined or plied yarns via control of air jets during texturing, use of air jets to manufacture torque-free yarns, yarn skein shrinkage, modifying yarn bulk and luster, and cont..

The Origins of Texturing

Basic false twist yarn texturing twists a yarn to its maximum extent, sets the twist by heating and cooling, and untwists the set yarn. Filaments in the yarn snarl into pigtails to relieve the torque, which results in high yarn contraction and recovery. Continuous polymerization, high speed winding, and air jet interlacing have reduced th..