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Fabric

Sizing zero twist fabrics

Sizing is a complementary operation which is carried out on warps formed by spun yarns with insufficient tenacity or by continuous filament yarns with zero twist. It is done with an aim of improving yarn smoothness and tenacity during the subsequent weaving stage. The sizing methods change depending on the type of weaving machine used, on the yarn type and count, on the technician’s experience and skill, on the kind of material in progress.

Fabric Weaving – woven fabrics

The weaving is a process of formation of fabric with interlacement of two or more sets of yarns using a stable machine called loom. Human beings have started using the woven fabrics since the dawn of history. If we exclude the stone age period, the history of civilization is also, to some extent, the history of weaving. Though primitive civilizations used coarser threads to make fabrics which were crude and coarse, there are references of fine fabrics made from the filament of silk in China.

Broken Twills – weaving

A broken twill weave composed of vertical sections which are alternately right hand and left hand in direction. In Broken Twills, twills are constructed by breaking the continuity of any continuous twill weave. They are formed by reversing the pattern part way through the repeat. The Break can be achieved in different ways.

Weaving Loom Mechanisms

The basic mechanisms in any type of looms can be classified into Primary (shedding, picking & beat up), secondary and Auxiliary motions. Shedding opens the warp sheet into layers. The picking causes the shuttle carrying weft to be propelled from one end of the loom to another. The beat-up motion lays the previously laid weft to the fell of the cloth. The secondary motion comprises of take-up and let-off motions. The auxiliary motions consist of the warp stop, weft stop, and warp protector motions.

Combination twill weaving

Combination twills find extensive use in the worsted industry in the production of garment fabrics, as these weaves are capable of producing compact textures. These twills are constructed by two methods 1. End and end combination 2.Pick and pick combination. In the first method the twill weaves are combined end way and in the second method twill weaves are combined in pick way. In combination with twill weaves two different types of continuous twills are combined together alternately.

Re-Arranged Twills

These twills are obtained by arrangement of a continuous twill either warp way or weft way. There arrangement is normally done in a particular order or sequence. Rearranged twills are of two types Satin/sateen weaves and Corkscrew weaves.

Zigzag or Wavy Woven Twills

Wavy twills are also known as pointed twills. In these classes of twill weaves the twill progresses in one direction for half of the repeat and then is reversed for the next half of the repeat. The reversal of the twill may be done in a regular or irregular manner primarily considering the series of threads that predominate the face of the fabric. Thus warp way reversal is where the warp predominates over the weft and weft way reversal where the weft predominates over the warp.

Twill Weaves

Twill is a type of textile weave with a pattern of diagonal parallel ribs. It can be identified by looking at the presence of pronounced diagonal lines that run along the width of the fabric. It has higher resistance to tearing than a plain weave because it has fewer yarn interlacing per area, therefore a greater degree of internal mobility. In addition, two yarns will bear the load when the fabric is torn.