The effect of sunlight exposure on the mechanical properties of wool and wool/ polyester fabrics has been investigated. Instrumental analysis shows that the fabrics become stiffer, rougher, and less elastic with irradiation. This research reveals some differences compared to previously published results for wool fabric irradiated with an artificial light source. Subjective analysis suggests that changes in the mechanical properties can be detected at shorter irradiation times for the 100% wool fabric than for the wool/polyester fabrics. The hygral expansion of wool is unaffected by sunlight irradiation.
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References
1.
Baird, M., Carr, C.M., and Harwood, R.J., Observations on the Hygral and Thermal Expansion of Surfactant Treated Wool , J. Textile Inst.79, 662-665 (1989).
2.
Dhingra, R.C. , Liu, D., and Postle, R., Measuring andInterpreting Low-Stress Fabric Mechanical and Surface Properties, Part II: Application, Textile Res. J.59, 357-368(1989).
3.
Holt, L.A., and Waters, P.J., Factors Affecting the Degradation of Wool by Light-Wavelength, Temperature, Moisture Content, in "Proc. 7th Int. Wool Text. Res. Conf., Tokyo," vol. IV, 1985, pp. 1-10.
4.
Holt, L.A., Leaver, I.H., Milligan, B., Waters, P.J., and Wilshire, J.F., Wool Photodegradation and Its Prevention, in " Proc. 7th Int. Wool Text. Res. Conf., Tokyo," vol. IV, 1985, pp. 31-40.
5.
Kawabata, S. , "The Standardisation and Analysis of Hand Evaluation ," 2nd ed., The Textile Machinery Society of Japan , Osaka, 1980.
6.
Milligan, B. , and Holt, L.A., U.V. Absorbers for RetardingWool Photodegradation: Sulphonated 2-Hydroxybenzophenones and 2,2-Dihydroxybenzophenones , Polym. Degrad. Stabil.10, 335-352 (1985).
7.
Milligan, B. , The Degradation of Automotive Upholstery Fabrics by Light and Heat, Rev. Prog. Colour.16, 1-7 (1986).
8.
Nicholls, C.H. , Photodegradation and Photoyellowing of Wool, in "Developments in Polymer Photochemistry," vol. 1, N. S. Allen, Ed., Applied Science, London, 1980.
