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Abstract

The tensile properties of wool, mohair, human hair, casein, Vicara, and silk, including their behavior when knotted, after repeated stresses (mechanical conditioning) and when swollen in water were investigated. The immediate elastic recovery, the delayed recovery, and the permanent set of these fibers were measured by means of a cycling technique using the Instron tensile tester and the Sookne-Harris fiber extensometer. Actual and relative values of elonga tion components under different testing conditions are demonstrated graphically from the be ginning of the stretching procedure up to rupture.

Wool has an outstanding elastic recovery in the dry state, and its elastic behavior is improved after mechanical conditioning and when wet. Mohair and human hair, and to some extent casein and Vicara, have elastic properties similar to those of wool. The tensile behavior of silk is different, being characterized by considerable permanent set (dry and wet) and by high immediate elastic recovery after mechanical conditioning.

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References

Burr, G.S. , Servo-Controlled Tensile Strength Tester, Electronics 22, No. 5, 101-5 (1949).

Harris, M. , and Brown, A.E. , Natural and Synthetic Protein Fibers, TEXTILE RESEARCH JOURNAL 17, 323-39 (1947).

Hindman, H. , and Burr, G.S. , The Instron Tensile Tester , Trans. Am. Soc. Mech. Engrs. 71, 789-96 (1949).

Hopkins, G.E. , Wool as an Apparel Fiber, TEXTILE RESEARCH JOURNAL 20, 592-603 (1950).

Koch, P.A. , Tables of Fibers (Vicara), Textil-Rundschau 5, 278-80 (1950).

Maillard, F. , Roehrich, O. , and Fresco, F. , New Considerations Concerning the Elasticity of Textile Fibers, Bull. inst. textile France No. 6, 9-20 (1948).

Sookne, A.M. , Some Applications of Stress-Strain Measurements to the Determination of Fiber Properties , in "A. S. T. M. Standards on Textile Materials," Philadelphia , Am. Soc. Testing Materials, 1948, pp. 498-502.

Sookne, A.M. , and Rutherford, H.A. , Autographic Load Elongation Apparatus for Fibers, J. Research Natl. Bur. Standards 31, 25-31 (1943).

Speakman, J.B. , The Gel Structure of the Wool Fiber, J. Textile Inst. 17, T457-71 (1926).

10.

Susich, G. , and Backer, S. , Tensile Recovery Behavior of Textile Fibers, TEXTILE RESEARCH JOURNAL 21, 482-509 (1951).

11.

von Bergen, W. , and Wakelin, J.H. , Properties of Apparel Wools: I: Preliminary Report on Worsted Processing Trials, TEXTILE RESEARCH JOURNAL 22, 123-37 (1952).

12.

Zahn, H. , The Softening Temperatures of Several Keratin Fibers, Kolloid-Z. 113, 157-9 (1949).

The Tensile Behavior of Some Protein Fibers

Abstract

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