Tuesday, July 20, 2010

Classification Of Fabric

There are three principal methods of mechanically manipulating yarn into textile fabrics : interweaving (interlacing or interlacement), interlooping and intertwining. All three methods have evolved from hand-manipulated techniques through their application on primitive frames into sophisticated manufacturing operations on automated machinery.

Interweaving :
It is the intersection or interlacement of two sets of straight threads, warp (ends) and weft (picks or filling), which cross and interweave at right angles to each other. Weaving is by far the oldest and most common method of producing continuous lengths of straight-edged fabric.

I
nterlooping : It consists of forming yarn(s) into loops, each of which is typically only released after a succeeding loop has been formed and intermeshed with it so that a secure ground loop structure is achieved. The loops are also held together by the yarn passing from one to the next. Knitting is the most common method of interloping and is second only to weaving as a method of manufacturing textile products. It is estimated that over seven million tons of knitted goods are produced annually throughout the world. Although the unique capability of knitting to manufacture shaped and form-fitting articles has been utilized for centuries, modern technology has enabled knitted constructions in shaped and unshaped fabric form to expand into a wide range of apparel, domestic and industrial end-uses.

Intertwining and twisting :
It includes a number of techniques, such as braiding and knotting, where threads are caused to intertwine with each other at right angles or some other angles. These techniques tend to produce special constructions whose uses are limited to very specific purposes. There is another method of manipulating directly fibre into textile fabrics is so called nonwoven process. This relatively young branch of the textile industry has expanded enormously after the c world-war because of the high production rates and the resulting cost savings.

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