A stuffer-box crimping unit was fabricated based upon the principle of heating, buckling, and cooling, and its process mechanics was evolved. Buckling theory was substantiated to negate the long-standing view of crumpling action inside the stuffing tube. Nylon 6 multifilament yarns of 70 den/17 fil and 105 den/17 fil were processed at 150, 170, and 190°C. The breaking load, buckling length, and crimp angle decreased with increase in temperature, while the denier, elongation, and work of extension at fifth cycle of loading showed an increase.
. FinchR. B., Interfiber Stress and Its Transmission. Part I: Measurement of the Contact Area Between Fibers Under Pressure, Textile Res. J.21, 375–382 (1951).
3.
. HathorneB. L., Stuffer-Box Crimping—Textralized Yarns, Patents, in “Woven Stretch and Textured Fabrics,”Interscience Pubs., N. Y., 1964, pp. 78–89, 265–354.
. Monsanto Publication, “Textured Yarn Technology,”Vol. I: Production, Properties, and Processing; Pinlon Process, 1967, pp. 161–163.
6.
. Monsanto Publication, “Textured Yarn Technology,”Vol. I: Production, Properties, and Processing; Dynamic Yarn Test for Textured Yarn, 1967, pp. 280–282.
7.
. MoreleyA., Direct and Bending Stresses, in “Theory of Structures,”Longmans Green, London, 1950, pp. 288–294.
8.
. SenguptaA. K.SinghR. K.MajumdarA., Effect of Drawing and Texturizing on the Molecular-Weight Distribution of Nylon 6 Multifilament Yarns, Textile Res. J.44, 155–163 (1974).
9.
. TaylorJ. S.BhattacharyyaD., A New Technique in Stuffer-Box Crimping, Textile Recorder80, 58–61 (1962).
. WrayG. R., Principles of Bulked Yarn Manufacture. Part 4, Textile Recorder78, 54–56 (1961).
12.
. WrayG. R., Compression-Crimped (Stuffer-Box) Yarns, in “Encyclopedia of Polymer Science and Technology,”Vol. 13, Interscience Pubs., N. Y., 1970, pp. 754–757.
