Pad-steam cationization of textiles
AssigneeDow Global Technologies LLC
InventorsSandeep Nikam, Laura Havens, Ling Zhang-watson
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Abstract
Described are methods and systems for cationizing and dyeing a natural fiber-containing textile. The method includes a step of steam treating a textile padded with a base and cationizing agent in a defined temperature range (greater than 100° C. to less than 110° C.) and for a defined time period (1 min to 10 min). The cationizing agent in the presence of the base is capable of generating two epoxide groups. The cationization step in the presence of steam using the halogenated catonization agent of the invention facilitates improved dyeing.
Claims19
A method for cationizing a textile including a natural fiber or derivative thereof, the method comprising
- treating a textile including a natural fiber or derivative thereof with an aqueous solution comprising an alkali metal hydroxide and a cationizing agent comprising a halogenated compound capable of generating two epoxide groups in the presence of the alkali metal hydroxide;
- and
- treating the textile in an environment comprising steam at a temperature in the range of greater than 100° C. to less than 110° C. for a period of time in the range of 1 min to 10 min to react the cationizing agent with the fabric.
A system for cationizing and dyeing a textile including a natural fiber or derivative thereof, the method comprising
- a padding bath for treating a textile including a natural fiber or derivative thereof configured to hold an aqueous solution comprising an alkali metal hydroxide and a cationizing agent comprising a halogenated compound capable of generating two epoxide groups in the presence of the alkali metal hydroxide;
- and
- a steaming apparatus capable of treating the fabric in an environment comprising steam at a temperature in the range of greater than 100° C. to less than 110° C. for a period of time in the range of 1 min to 10 min to react the cationizing agent with the fabric.
Dependencies are inferred from the claim text.