Decolorization method of polyester fabric
AssigneeNan Ya Plastics Corporation
InventorsTe-Chao Liao, Jung-Jen Chuang, Zhang-Jian Huang
Life of this patent
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Abstract
A decolorization method of a polyester fabric, including the following steps, is provided. A first extraction treatment is performed on the polyester fabric using a recycled solvent, so that a first portion of a dye in the polyester fabric moves into the recycled solvent. A first filtering treatment is performed on the recycled solvent and the polyester fabric to obtain a treated polyester fabric. A second extraction treatment is performed on the treated polyester fabric using a fresh solvent, so that a second portion of the dye in the treated polyester fabric moves into the fresh solvent. A second filtering treatment is performed to obtain a decolored polyester fabric and the recycled solvent.
Claims9
A decolorization method of a polyester fabric, comprising:
- performing a first extraction treatment on the polyester fabric using a recycled solvent, so that a first portion of a dye in the polyester fabric moves into the recycled solvent;
- performing a first filtering treatment on the recycled solvent and the polyester fabric to obtain a treated polyester fabric;
- performing a second extraction treatment on the treated polyester fabric using a fresh solvent, so that that a second portion of the dye in the treated polyester fabric moves into the fresh solvent;
- and
- performing a second filtering treatment to obtain a decolored polyester fabric and the recycled solvent, wherein the recycled solvent comprises fresh solvent and 0.1 wt. % to 10 wt. % dye, based on a total weight of the recycled solvent.
Dependencies are inferred from the claim text.