US 12,269,077 B2
Disposal method for waste fabric containing polyester and nylon
Te-Chao Liao, Taipei (TW); Jung-Jen Chuang, Taipei (TW); and Tzu-Huan Wong, Taipei (TW)
Assigned to NAN YA PLASTICS CORPORATION, Taipei (TW)
Filed by NAN YA PLASTICS CORPORATION, Taipei (TW)
Filed on Jan. 5, 2022, as Appl. No. 17/568,730.
Claims priority of application No. 110139088 (TW), filed on Oct. 21, 2021.
Prior Publication US 2023/0132027 A1, Apr. 27, 2023
Int. Cl. B09B 3/70 (2022.01); B09B 101/85 (2022.01)
CPC B09B 3/70 (2022.01) [B09B 2101/85 (2022.01)] 12 Claims
OG exemplary drawing
 
1. A disposal method for waste fabric containing polyester and nylon, comprising:
step (a): providing a waste fabric containing polyester and nylon;
step (b): performing a first-stage treatment on the waste fabric to obtain a first liquid material and a first solid material;
step (c): performing a second-stage treatment on the first liquid material to obtain a second liquid material and a second solid material;
step (d): performing a third-stage treatment on the first solid material to at least obtain a third liquid material and a third solid material; and
step (e): performing a fourth-stage treatment on a third liquid material to obtain a fourth liquid material and a fourth solid material, wherein
the first-stage treatment comprises acid treatment;
an acid concentration of the second liquid material is lower than an acid concentration of the first liquid material;
the third-stage treatment comprises acid treatment;
an acid concentration of the acid treatment of the third-stage treatment is less than an acid concentration of the acid treatment of the first-stage treatment;
the acid concentration of the acid treatment of the third-stage treatment is greater than the acid concentration of the second liquid material;
an acid concentration of the fourth liquid material is lower than an acid concentration of the third liquid material; and
the third solid material comprises recycled polyester, the second solid material comprises recycled nylon, or the fourth solid material comprises recycled nylon.