Method for degumming and decolorizing polyester fabric
AssigneeNan Ya Plastics Corporation
InventorsTe-Chao Liao, Jung-Jen Chuang, Chung-Chi Su
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Abstract
A method for degumming and decolorizing polyester fabrics is provided. The method includes the following steps. A first polyester fabric attached with a dye and a gum-film or treatment agent is provided. The gum-film or treatment agent in the first polyester fabric is stripped through a combined formulation of an alkaline aqueous solution and a catalyst to obtain a second polyester fabric. Then, the second polyester fabric is decolorized by a combination of a chemical reduction method and a chemical oxidation method to obtain a third polyester fabric.
Claims19
A method for degumming and decolorizing a polyester fabric, comprising:
- providing a first polyester fabric attached with a dye and a gum-film or a surface treatment agent;
- performing degumming operation, comprising:
- mixing a catalyst in an alkaline aqueous solution to prepare a catalyst solution;
- and
- immersing the first polyester fabric into the catalyst solution to remove the gum-film or the surface treatment agent, and obtaining a second polyester fabric attached with the dye;
- and
- performing decolorizing operation, comprising:
- providing a reduction decolorization solution and an oxidation decolorization solution;
- immersing the second polyester fabric into the reduction decolorization solution for a reduction decolorization reaction;
- immersing the second polyester fabric into the oxidation decolorization solution for a oxidation decolorization reaction;
- and
- removing the dye and obtaining a third polyester fabric.
Dependencies are inferred from the claim text.