Such other fibers and other fibrous materials include cotton fibers, cotton linters, rayon, wood pulp, cotton batting, synthetic fibers, such as cellulose esters notably cellulose acetate, polyesters from dihydric alcohols and terephthalic acid such as Dacron and Kodel, acrylics containing at least 85% by weight of acrylonitrile such as Acrilan and Orlon, modacrylics containing less than 8