32—THE WEATHERING OF COTTON, NYLON, AND TERYLENE FABRICS IN THE UNITED KINGDOM

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Abstract
It is well known that textile fabrics lose strength when subjected to unprotected outdoor exposure, and the amount of strength lost for a given period of time, or for a given number of sun-hours as measured by the Campbell-Stokes apparatus, may vary considerably according to the nature of the fibre and to the climatic conditions prevailing at the exposure site. From data recorded at eight exposure sites in the United Kingdom during 1961 and 1962, it is possible to draw certain conclusions. Thus, in rural areas, such as Pontypool (Mon.), Invergowrie (Perth), and Carlton (Durham), where ‘clean’ or unpolluted atmospheres might be expected to exist, an 11-oz/yd2 cotton duck was found to be more resistant than either a 10½-oz/yd2 nylon or a 14-oz/yd2 Terylene fabric. In semi-rural areas, such as Lanark and Farnborough (Hants.), 11-oz/yd-2; cotton duck appeared to be as resistant as Terylene. It was only in urban areas, such as Didsbury and Droylsden (Lanes.) and Bradford (Yorkshire), that cotton was found to be inferior to Terylene and to a less extent to nylon. The 16-oz/yd2 cotton fabric was found to be more resistant than the 11-oz/yd2 one.
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