A binder latex, freshly dispersed within a fiber fleece, is mobile and subject to several disturbing influences which may cause uneven distribution of binder in the resulting fabric. Generally, latex tends to migrate to the surface of the material during drying and it is shown that in lahoratory-made fabrics this effect increases with increasing drying temperature, in accordance with the theoretical expectation. Migration can also be induced by displacement of the latex with a strong aqueous salt solution, particularly magnesium sulfate. By applying the solution at many points simultaneously, a pattern of binder distribution can be formed giving, on drying, a segmentally honded fahric.
