Process for producing two-toned lustrous effects in dyed fabrics
AssigneeA. Wimpfheimer & Bro., Inc.
InventorNicholas Caleshu
Life of this patent
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Abstract
A process for treating a dyed, velvet fabric is disclosed wherein two-toned color effects between the pile and the fabric backing are achieved. The preferred fabric comprises a cellulosic (cotton or rayon) or synthetic fiber weave backing dyed preferably with a non-disperse dye, e.g. a direct dye, and pile composed of cellulose acetate fibers dyed with a disperse dye. The dyed fabric is contacted with a dilute caustic solution, e.g., sodium hydroxide, for a period of time sufficient to at least partially or totally hydrolyze the cellulose acetate of the pile fiber, which noticeably also reduces the color intensity of the pile while having little effect on the color intensity of the backing. This is followed by rinsing, neutralization and conditioning of the treated fabric.
Claims20
A process of creating a two-toned color effect in a dyed velvet fabric composed of a dyed weaved fiber backing and containing pile comprising cellulose acetate fibers dyed with a disperse dye wherein said two-toned color effect is between said pile and said backing, said process comprising:
- a) contacting said dyed fabric with a dilute aqueous alkali solution for a period of time sufficient to at least partially hydrolyze said cellulose acetate of said pile fibers and effect a reduction in the color intensity of the pile but insufficient to substantially degrade any of said fibers;
- b) separating said fabric from said alkali solution;
- and
- c) rinsing said fabric with rinse water to remove excess alkali present in said fabric.
A process of creating a two-toned color effect in a dyed velvet fabric composed of a backing of weaved rayon, cotton or rayon/cotton mixture, said backing dyed using a direct dye, said fabric containing cellulose monoacetate pile fibers dyed with a disperse dye, wherein said two-toned color effect is between said pile fibers and said backing, said process comprising:
- a) contacting said dyed fabric with an aqueous solution containing from about 0.75 to about 3.0 percent by weight of sodium hydroxide maintained at a temperature in the range of about 100.degree. F. to 200.degree. F. for a period of time of at least about 10 minutes and sufficient to hydrolyze said cellulose acetate of said pile fibers and effect a reduction in the color intensity of the pile but insufficient to substantially degrade any of said fibers;
- b) separating said fabric from said sodium hydroxide solution;
- c) rinsing said fabric with rinse water to remove excess alkali present in said fabric;
- d) contacting said rinsed fabric with a dilute aqueous acidic solution for a period of time sufficient to lower the pH of said fabric to about neutral pH;
- e) contacting said neutralized fabric with an aqueous solution containing a non-ionic or cationic fabric softening agent;
- and
- f) tentering and drying the fabric from step (e).
Dependencies are inferred from the claim text.