| 摘要 |
<p>A method of selectively altering the extensibility of a fabric across its width is disclosed, which comprises providing a fabric (10) having indeterminate longitudinal dimension and a width defined by first and second edges (14,16), the fabric having extensible yarns in the longitudinal dimension, and applying mechanical pressure and/or heat to selected areas whereby to weaken or lower the elasticity of the yarn selectively from one edge to the other. The elastic yarns may be selectively cut by a reciprocating or rotary die, preferably the latter. Alternatively, the yarns may merely be embossed so as selectively to thin them in the embossed area whereby to lower elasticity and increase extensibility. Additionally or alternatively, the yarns may be completely or partially melted by the application of heat to achieve the same effect. The main advantage of the invention is that a standard commercially available interlining material, having elastic, for example 'Lycra' TM, threads running in the longitudinal direction may be employed without having to weave a special asymmetrical fabric.</p> |
