Yarn Hairiness--Concept, Theory, Measurement, and Evolution throughout Industrial Textile Processing Chain. Part Three. Postspinning Processes. Chapter XII, Preparation for Weaving and/or Knitting.

A review of postspinning processes that effect yarn hairiness focuses on preparation for weaving and spinning, including yarn storage; processes that impart hairiness deliberately; winding and rewinding; doubling, twisting, and retwisting; singeing and warping; and sizing (composition and application of size, control of the amount of size..

Structure Analysis of Air-Jet Textured Elastane combination Yarns.

Edmund Erdmann GmbH and Company and RWTH Aachen developed air jet texturing and covering processes that enable the first commercial manufacture of air jet textured blend yarns containing elastane fibers. The resultant air jet textured and covered (ATC) yarns are covered irregularly within entangled areas where the individual yarn componen..

Tenacity-Gauge Length Relationship through Weak-Link Effect for Yarns Spun on Various Spinning Systems with Different Fibres.

Researchers examined various yarns and spinning systems to confirm and compare the validity of weak link effects. The weak link theory suggests that materials never reach their theoretical strength due to inherent flaws in the material. The application of the weak link theory to yarn related tensile and gage properties to weak link effect..

Some Important Issues Related to Yarn Strength.

An investigation of yarn strength prediction problems addressed stress transfer between fibers, stress distribution along a fiber during yarn extension, critical and optimal test levels, minimum fiber aspect ratio, fiber/fiber bundle and fiber bundle/yarn strength relationships, the fragmentation process, and critical fiber length during ..

Development of Polypropylene/Cotton Yarns for Use in Single-Jersey Knitted Fabrics.

The use of polypropylene staple fiber in apparel fabrics has grown, in part, because of improvements in the fiber's properties. The development of fabrics constructed from polypropylene/cotton yarns is in response to consumer demand for fabrics that have improved performance and comfort characteristics. Ideally, fabrics constructed from p..

Effect of Twist on Air-Jet & Ring Yarns.

Researchers studied the influence of ply twist and twist direction on the structural and mechanical properties of air jet and ring spun viscose yarns. In cross sections of single air jet yarns, the packing density of various zones decreased from the core to the outer surface. In ring spun yarns, packing density first increased from the ce..

Tensile Characteristics of Rotor and Friction Spun Jute Blended Yarns.

Open end rotor and friction spinning machines manufactured jute blend yarns of lower counts at higher production rates than conventional flyer spinning machines. An investigation of the behavior of rotor and friction spun jute blend yarns under tensile deformation showed that tensile and viscoelastic properties depended on fiber alignment..

The Yarn, origin of Creation.

The Expofil yarn exhibition will change its venue to the Villepinte Exhibition Centre near the Charles de Gaulle-Roissy airport. The new venue offers 18 percent more floor space, which will be devoted to lrger booths for existing exhibitors as well as new exhibitors. AFPFT manages the Expofil exhibition.

Heberlein: Interlacing, Texturing Jets and Friction Discs.

Heberlein manufactures interlacing jets for filament yarn manufacture and for blending yarns for spinning, spin drawtexturing, drawtwisting, draw winding, false twist texturing, air covering, and co-interlacing. Its Pulsar novelty yarn system uses intermittent air flow suply to the jet to regulate the spacing between interlacing joints fo..

Unifying the Textile Chain.

From 1996-1998, Unifi invested $300 million in new texturing and partially oriented yarn (POY) spinning machinery for its North Carolina facility. Approximately $10 million was spent on a pilot spinning plant to facilitate research and development. The North Carolina plant manufactures 3.5 million pounds of POY per week. Its research faci..