Drying process of fibrous materials for wear has been studied by reference to characteristic curves and water -content distribution of plied samples with polyester and/or rayon plain fabrics . Water content of each plied sheet at critical point when drying rate became falling, was equal to the critical value when it was dried by a sheet. In falling rate period, both samples had sloped "ply effect" ; just as the water content decreased from critical point, the degree of drying rate decreasing

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... omes more rapid with ply numbers. This effect is the results of sloped distribution of water content and is more crear in rayon samples.