Method for recycling polyester fabric
AssigneeNan Ya Plastics Corporation
InventorsTe-Chao Liao, Jung-Jen Chuang, Zhang-Jian Huang, Yu-Ti Tseng
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Abstract
A method for recycling a polyester fabric is provided. The method includes providing a polyester fabric that is dyed and has dye and water repellent attached thereon, providing a composite solvent containing water and acetic acid mixed with each other, performing an extraction operation including infiltrating the polyester fabric with the composite solvent and extracting the dye and the water repellent, and carrying out a liquid state polycondensation reaction on the polyester fabric so that an intrinsic viscosity of the polyester fabric is increased and residual impurities of the polyester fabric are further removed.
Claims10
A method for recycling a polyester fabric, comprising:
- providing a polyester fabric that is dyed and has dye and water repellent attached thereon;
- providing a composite solvent consisting of water and acetic acid mixed with each other, wherein the composite solvent is prepared by mixing 10 to 30 parts by weight of the water with 70 to 90 parts by weight of the acetic acid;
- performing an extraction operation including infiltrating the polyester fabric with the composite solvent and extracting the dye and the water repellent to remove the dye and the water repellent from a material of the polyester fabric so that the polyester fabric is restored and has an L value that is not less than 60 and a water repellent content that is not more than 500 ppm;
- and
- carrying out a liquid state polycondensation reaction on the polyester fabric so that an intrinsic viscosity of the polyester fabric is increased and residual impurities of the polyester fabric are further removed.
Dependencies are inferred from the claim text.