Patent ID: 7537621

Claim:
A method of dyeing a nonwoven fabric comprising a blend of fibers to a single color shade, the method comprising: selecting a nonwoven fabric formed of a blend of polyester and nylon fibers, the polyester fibers comprising an amount of about X percent by weight of the fabric and the nylon fibers comprising an amount of about Y percent by weight of the fabric; formulating in a single bath an amount of dye comprising about X percent by weight disperse dye and about Y percent by weight acid dye, wherein the percentage by weight of each type of dye is equal to the percentage by weight of each type of fiber, the amount of each dye adjusted for the desired color shade; and dyeing the nonwoven fabric to obtain a dyed fabric having a uniform color shade throughout of at least Grade 4 when measured in accordance with AATCC Test Method 153 and a colorfastness of at least Grade 4 when measured in accordance with AATCC Test Method 61.