Patent ID: 7550017

Claim:
A method for making a nonwoven textile substrate comprising the steps of: (a) providing a nonwoven textile substrate comprising microfibers; (b) dyeing the nonwoven textile substrate with a non-azo disperse dye; (c) scouring the dyed nonwoven textile substrate by a process comprising the steps of: (i) immersing the dyed nonwoven textile substrate in an aqueous bath comprising at least one alkali material, (ii) increasing the temperature of the aqueous bath to a first temperature, (iii) adding a reductive scouring material to the aqueous bath at the first temperature, (iv) scouring the dyed nonwoven textile substrate in the aqueous bath at the first temperature, (v) decreasing the temperature of the aqueous bath to a second temperature, and (vi) rinsing the dyed nonwoven textile substrate.