An Orifice Test to Evaluate Yarns for Swelling-Type Water-Resistant Fabrics

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Abstract
A technique is described for determining the relative closing capacities, largely a reflection of swelling behavior, of fibers in the form of parallel strands of yarn packed tightly in orifices, by observation of the seepage of water through the yarn. The method has been used successfully to predict the performance of cotton yarns for the type of water-resistant fabric whose utility depends largely upon "self-sealing" by swelling. Relatively wide variations in yarn construction have been shown to have little effect on closing capacity, whereas fiber shape and size, as well as swelling properties, have pronounced effects.

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