What is Spinning?
A Yarn is usually of substantial length & of small cross section. In the cross section of a yarn there are usually a multiple number of Staple fibers (short fibers)…
EFFECT OF MACHINE DEFECTS
The irregularities that may be caused by machine defects are usually independent of those caused by the material characteristics. However, irregularities caused by uncontrolled stretching of the input or output…
The Effect of Fiber Properties
The fiber properties likely to affect the degree of fiber entanglement in a tuft, and therefore, nep formation, are 1. fineness (diameter and length, i.e., aspect ratio) 2. crimp level…
THE IMPORTANT FIBER CHARACTERISTICS AND PROPERTIES FOR YARN PRODUCTION
If we consider the points made earlier about what constitutes a yarn, we can make reasonable deductions as to what fiber characteristics and properties are important in yarn production. The…
PRINCIPLES OF YARN PRODUCTION
It can be reasoned that to obtain a high degree of fiber parallelism in a yarn, the fibers must be already straight and parallel in the fiber assembly presented for…
DIMENSIONS OF A YARN
Straightening the yarn length to measure the diameter involves tensioning the yarn, which also narrows the cross section by bringing fibers into closer contact and increasing the packing density. Although…
Assumptions and Geometrical Relations for Helix Yarn Model
We must consider several important limitations to the basic model. • Many fibers do not have circular cross sections. Furthermore, when fibers of circular cross sections are inclined at a…
THE IMPORTANCE OF YARNS IN FABRICS
Textile fabrics cover a vast range of consumer and industrial products made from natural and synthetic fibers. Figure 1.2 illustrates that, to produce a fabric for a particular end use,…
Fundamentals of Yarns and Yarn Production
Man’s cultural history goes back about 10,000 to 12,000 years, when some tribes changed from being nomadic forager-hunters, who followed the natural migration of wild herds, to early farmers, domesticating…
Twist distribution in spun yarns
If someone twists your head, it is your neck that suffers most. That is because the neck is a ‘thin’ place and offers little resistance to being twisted. By analogy,…
