The Recovery of Crimp of Wool Fibers

Banbaji, J.; Alexander, E.; Shiloh, M.; Lewin, Menachem

doi:10.1177/004051756203200706

Cited by 5 publications

(4 citation statements)

References 13 publications

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“…Decrimping energies were determined by measuring the length changes of crimped wool fibers under different loads, the method being basically that of Bambaji et al [3]. The fiber was fixed between two small paper squares, the crimped length being 4.0 cm.…”

Section: X-ray Diffraction Patternsmentioning

confidence: 99%

Studies on Magra (Indian) Wool

Blakey

Earland

Jalihal

1967

Textile Research Journal

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A detailed physicochemical examination has been made of Magra wool, which is obtained from one of the principal sheep breeds found in the dry, northern region of India. In order to obtain more uniform materials to study, the wool was divided into fine fibers devoid of medulla, averaging about 56 s quality (MGAF), and heterotypic fibers of about 44 s quality containing fragmental medullae (MGAH). The hairs and kemp present in this breed were not examined. For comparative purposes, parallel studies were made also on 64 s Merino wool.There are three major structural differences between MGAF fibers and Merino wool.The former possesses a much lower cystine content, contains more amorphous material, and has a different orthoand para-cortical cell distribution. Although physical measurements indicate that MGAF fibers may constitute a good-quality wool, these differences must be borne in mind, and it would be essential to ensure that improved breeding methods, which would diminish the heterotypic fibers and result in the loss of the valuable "carpet wool" qualities, will in fact be followed by the development of a highquality apparel wool.

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Section: X-ray Diffraction Patternsmentioning

confidence: 99%

Studies on Magra (Indian) Wool

Blakey

Earland

Jalihal

1967

Textile Research Journal

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“…The &dquo;effective&dquo; wave number was given by An &dquo;effective&dquo; curvature was defiaed us follows These parameters have previously been used for the measurement of crimp of wool fibers [1,2,7], as well as of artificially crimped jute E4]. They are used in the present work in order to differentiate hetween various cottons by their crimp properties.…”

Section: The Static Parametersmentioning

confidence: 99%

“…The mass 1)er unit leiigtil m of l'ach tilx·r was measured on the fnsco vihrosco»e.2 2 The mean values of the diameters of each variety were determined through the equation where the density was taken as p = 1.55 g Cln3.…”

Section: Generalmentioning

confidence: 99%

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The Crimp of Cotton Fibers

Alexander

Lewin

Litav

et al. 1962

Textile Research Journal

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An investigation of the crimp properties of cotton fibers is presented. Two independent groups of parameters are used: one describing the geometry of the fiber and the other the dynamic behavior of its crimp.The static parameters—the crimp diameter and the crimp ratio—are measured on a crimp meter. The dependence of these parameters on the applied load is determined, and some functional relationships are suggested.The dynamic parameters used are the uncrimping energy and the uncrimping force. Both are determined from the load-elongation curves, recorded on the Instron tester. The coefficients of immediate and retarded recovery of crimp of fibers subjected to tensile deformation are determined.Two varieties of cotton are tested: Deltapine 15 and Acala 1517. A significant diffference between the mean static parameters of these varieties is found. The more crimped appearance of the Deltapine fibers is confirmed by the higher values of these parameters. Furthermore, the force necessary to draw out these fibers from the lot is found to be higher than for the Acala fibers. The values of the uncrimping energies of the Deltapine fibers are also found to be significantly higher than those of the Acala.The values of the recovery coefficients show that about 50% of the uncrimping energy of the Deltapine fibers is recovered immediately after stretching. The corresponding recovery of the Acala fibers is about 25%. After 24 hr of relaxation, the fibers of both varieties show a recovery of 55%. The uncrimping force and its recovery coefficient are found td be less sensitive parameters for characterizing these cotton varieties.

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