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US 7,550,017 B2Granted
Dyed microfiber textiles
AssigneeMilliken & Company
InventorsKaushal Gandhi, Benjamin H. Glover
Life of this patent
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Abstract
A nonwoven textile substrate formed from microfibers with a polyurethane matrix fully and/or partially impregnated therein, a nonazo disperse dye within microfibers, including the surface, and the matrix. The dyed fibers having an L value of about 35 or less, an ΔE light fastness of about 6 or less when subjected to about 225 kilo-joules, and a long term crock of at least about 1.5.
Claims4
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.
6 more elements
Dependencies are inferred from the claim text.