Abstract


This project work mainly focuses on control of stretch, moisture content and hardness of beam for terry weaving. Trials were conducted to control over stretch, moisture content and beam hardness. For this trials study were conducted in such a way that, making the beam with variables in terms of stretch, moisture content and beam hardness then collect their breakage rate at loomshed. These studies were conducted for different count then collect the result with respective count.


By reducing the stretch at wet zone and cylinder zone it reduces the permanent loss of elongation and reduces the end breakage rate at loomshed by using this saved elongation in loomshed. So that it gives the 41.88% reduction in end breakage rate. Whereas, by increasing moisture content in sized beam it reduces 38.60% reduction in end breakage rate because cotton has more wet strength than its dry strength. And reducing the beam hardness up to optimum level it gives the 29.59% reduction in breakage rate.


Introduction


The sizing of yarn absolutely essential to render it weavable; without sizing the end breakage rate of warp, particularly in the case of single yarns, is so high that weaving becomes impossible. The objective of sizing, however, sizing cannot be looked upon as a process that improves the basic quality of yarn. The fact is that by endowing the yarn with abrasion resistance, proper sizing bring out the full potential of a yarn to weave. The objective of sizing is to impart those property which it does not possess but which are essential to good weaving-the resistant to abrasion. This objective is achieved by applying on the yarn a uniform and smooth protective film of suitable sizing material. This improves the abrasion resistance and incidentally, also the tensile strength of the yarn. A properly sized yarn should have adequate improvement in abrasion resistance, indirectly indicated by the increase in tensile strength, minimum loss of extensibility and required amount of moisture. For satisfactory weaving the quality of the beam also important; the beam should be firm and it should not have excessive missing ends, crossed ends, taped ends (sticky ends) etc., so that it unwind smoothly in the loomshed.


The extensibility of the yarn reduces due to two reasons: a) application of size binds the fibres in the yarn more rigidly and reduces the relative slippage at the time of break, and b) even the minimum necessary tension applied during sizing results in a slight stretch that sets in permanently thereby reducing the yarn extensibility.


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The authors are associated with Centre for Textile Functions (CTF), NMIMS MPSTME Shirpur Campus, Shirpur Dist- Dhule, Maharashtra