发明名称 |
METHOD FOR DECOLORIZATION OF A DYED POLYESTER FIBER |
摘要 |
A method for decolorization of a dyed polyester fiber includes: separately providing a dyed polyester fiber stained with a dye, and a solvent capable of dissolving the dye; heating the solvent to produce a fresh vapor of the solvent, the temperature of the fresh vapor ranging between the glass transition temperature and the melting point of the polyester fiber; condensing the fresh vapor to form a condensed fluid of the solvent; contacting the dyed polyester fiber with the condensed fluid of the solvent that has a temperature sufficient to dissolve the dye such that the dye is extracted from the dyed polyester fiber so as to form a dye-containing solution and a decolorized polyester fiber; and separating the dye-containing solution from the decolorized polyester fiber. |
申请公布号 |
US2015059103(A1) |
申请公布日期 |
2015.03.05 |
申请号 |
US201414225889 |
申请日期 |
2014.03.26 |
申请人 |
FAR EASTERN NEW CENTURY CORPORATION |
发明人 |
LIU Pang-Chin;CHENG Hsin-Ling;WANG Cheng-Ting |
分类号 |
D06P3/52 |
主分类号 |
D06P3/52 |
代理机构 |
|
代理人 |
|
主权项 |
1. A method for decolorization of a dyed polyester fiber, comprising the steps of:
(a) separately providing a dyed polyester fiber stained with a dye, and a solvent that is capable of dissolving the dye; (b) heating the solvent to produce a fresh vapor of the solvent, the temperature of the fresh vapor ranging between the glass transition temperature and the melting point temperature of the polyester fiber; (c) condensing the fresh vapor to form a condensed fluid of the solvent; (d) contacting the dyed polyester fiber with the condensed fluid of the solvent that has a temperature sufficient to dissolve the dye such that the dye is extracted from the dyed polyester fiber so as to form a dye-containing solution and a decolorized polyester fiber; and (e) separating the dye-containing solution from the decolorized polyester fiber. |
地址 |
TAIPEI CITY TW |