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In wrinkling tests based on angular recovery from a fixed deformation, constraints imposed on the fibres by virtue of yarn or fabric construction are of secondary importance. When ageing effects have been eliminated, this results in similar wrinkle-ratings for all fabrics. Any performance differences subjectively assessed during wear arise from either fabric deformability or optical effects caused by differences in curvature. [ABSTRACT FROM AUTHOR]

The application of backdraft at the first gilling operation after carding results in significant reduction in percentage noil and an increase in the mean fibre length of the top. These effects depend on the backdraft and direction of feed. Percentage noil is also dependent on backratch but is independent of the faller-bar pinning density. Measurements are also given to show how back-roller force is affected by backdraft, backratch, and the total free space between the pins and the fallers. [ABSTRACT FROM AUTHOR]

An account is given of a method developed for numerical evaluation of equations for predicting the distribution of fibres between the small and large circles on the Noble comb and the amount of noil removed in terms of the comb-settings and the holding power of the circles. Experiments are described that were made to test quantitatively the predicted behaviour of the comb for changes in feed, large-circle drawing-off-roller distance, and holding power, and, in general, good agreement is shown between the calculated and observed results. [ABSTRACT FROM AUTHOR]

The variation of yarn irregularity with drafting speed has been studied, and it is shown that, provided that spinning tension is maintained constant, no changes in yarn irregularity occur over the normal range of 2-16 m/min. However, at higher speeds (25-450 m/min), increases in irregularity of approximately 0-7% in coefficient of variation are obtained on a 21-tex yarn for every 100-m/min increase in drafting speed. The magnitude of the change varies with the yarn linear density. [ABSTRACT FROM AUTHOR]

The article reports on the crease-recovery tests for textiles. The crease-recovery tests are conducted for the purpose of comparing fabrics. It is also used to rank the effects of different treatments on the same fabric material. It is expected that the results of the tests are reproducible and will represent the particular sample, which is being assessed. During storage, it is discovered that the crease-recovery of textile fabrics improve. This is also greatest for hydrophilic fibers, like cotton and wool. Molecular rearrangements within a fiber under the influence of sorbed water results to ageing.

The article presents research which assessed the influence of prior thermal treatments on the water absorption and wrinkle-recovery of wool. According to the author, heating can improve the wrinkle-recovery of wool. In this regard, the treatment was termed as annealing. The treatment is also believed to involve macromolecular rearrangements within the wool fiber through labile hydrogen bonds. This treatment was done to provide a minimum-energy configuration.