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US 2023/0147533 A1Published application
Textile separation methods
AssigneeThe Hong Kong Research Institute of Textiles and Apparel Limited
InventorsEdwin Yee Man Keh, Lei YAO, Alex CHAN, Un Teng LAM, Shi GAO
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Abstract
Provided herein is a method of separating spandex from textile blends using biosolvents. The recovered material is of high purity while the chemical structure and molecular weight remain substantially unaffected by the treatment.
Claims20
A method of separating spandex from a blended textile substrate comprising spandex and at least one other textile polymer, the method comprising:
- contacting the blended textile substrate with a biosolvent at a temperature between 80° C. to 150° C. thereby forming a treated textile substrate comprising the at least one other textile polymer and a biosolvent extract solution comprising the biosolvent and at least a portion of the spandex in the blended textile substrate;
- and separating the biosolvent extract solution and the treated textile substrate.
Dependencies are inferred from the claim text.