This paper describes the technique of finding the distribution of load-at-break and elongation-to-break of filaments in a multifilament yarn from the breaking steps in a load-elongation diagram. There is a correlation between the distribution data and the performance of undrawn nylon 6 yarn on the draw-twisting machine. The dis tribution in the drawn yarn is correlated with that of the undrawn yarn. The effect of spinning speed of the filament yarn on the distribution is brought out using low- speed spun nylon 6 yarn and MOY and POY polyester. The effect of the hot water relaxation process and aqueous dyeing process on the distribution is also studied.
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