During the process of weaving, the warp threads are subjected to friction and tension. The flight of the crossing weft shuttle, the beating of the sley and the passing of the reeds cause friction. The drawing over of the cloth beam imposes tension, and the mechanical movements of the whole loom cause vibration, all of which bear upon the wrap. Unless protected by some means, the thread would wear out and fray in weaving. This, in a nutshell, is the purpose of warp sizing.

For better working in the loom shed, resistance to abrasion is of vital importance. This is achieved by strengthening the warp yarn-by cementing fibres with certain adhesive substance which can be applied easily and can also be removed with equal ease when the cloth goes for bleaching and subsequent processing. Much of the success of the sizing operation depends upon the choice of the most suitable sizing ingredients, which serve the above purposes.

PROPERTIES :

FABRILOSE is a modified, thin, boiling starch. It has low and uniform viscosity, which does not change much with temperature unlike native starches, which show wide variation in viscosity. The keeping qualities of the native starch also show a marked variation, i.e. considerable degradation occurs on boiling.

FABRILOSE's non-congealing characteristic, shorter boiling time, transparency of paste and lower viscosity ensure easy working, compared to thick boiling starches. Unlike gum and glues which require soaking, FABRILOSE is readily dispersed in water and can be boiled into a smooth paste without any pretreatment.

One of the main drawbacks of tapioca size is that it thins down very much on boiling, resulting in an uneven pick up on the high speed machine. The viscosity of FABRILOSE does not change with boiling and ensures uniform pick up of size even on modern high speed sizing machines.