US 12,410,540 B2
High-viscosity PTT polymerization reactor and method for preparing direct melt-spun high-viscosity PTT/low-viscosity pet two-component elastic fiber
Shuchang Bian, Suzhou (CN); and Rui Wang, Suzhou (CN)
Assigned to Jiangsu Ganghong Fiber Co., Ltd., Suzhou (CN)
Filed by JIANGSU GANGHONG FIBER CO., LTD., Suzhou (CN)
Filed on Dec. 5, 2024, as Appl. No. 18/970,382.
Application 18/970,382 is a continuation in part of application No. PCT/CN2024/093557, filed on May 16, 2024.
Claims priority of application No. 202410046155.2 (CN), filed on Jan. 12, 2024.
Prior Publication US 2025/0230580 A1, Jul. 17, 2025
Int. Cl. D01D 5/38 (2006.01); D01F 8/14 (2006.01)
CPC D01D 5/38 (2013.01) [D01F 8/14 (2013.01); D10B 2331/042 (2013.01); D10B 2401/062 (2013.01); D10B 2401/063 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A high-viscosity PTT polymerization reactor, used to prepare a high-viscosity PTT melt for preparing a high-viscosity PTT/low-viscosity PET two-component elastic fiber, wherein, the high-viscosity PTT polymerization reactor is a horizontal polymerization reactor, and comprises a main body containing a chamber internally, the main body comprises a low viscosity zone, a med-high viscosity zone and a high viscosity zone disposed in sequence along the axial direction of the high-viscosity PTT polymerization reactor, the viscosity of the PTT melt in the low viscosity zone, the med-high viscosity zone and the high viscosity zone increases in sequence; the low viscosity zone and the med-high viscosity zone are both provided with disc reactors combinations, and the high viscosity zone is provided with a plurality of single-disc reactors; the high-viscosity PTT polymerization reactor further comprises a rotating shaft disposed in the front end of the low viscosity zone, a cage disc reactor combinations is designed in the low viscosity zone of the high-viscosity PTT polymerization reactor, and comprises a plurality of disc reactors combinations, and an outer cage frame fixedly connected to outer edges of the disc reactors combinations, and the rotating shaft drives the outer cage frame and the plurality of disc reactors combinations in the low viscosity zone to rotate; there is no agitating shaft disposed in an axial region corresponding to the disc reactors combinations in the low viscosity zone, and a circular channel is designed in the middle portion of the disc reactors combinations; there is an agitating shaft disposed in both the med-high viscosity zone and the high viscosity zone, and the disc reactors in the med-high viscosity zone and the high viscosity zone pass through the agitating shaft; the outer cage frame comprises a cage shaped part with a gear shaped in front end, and a material propelling part extending along the axial direction of the high-viscosity PTT polymerization reactor from each gear bend of the cage shaped part, and the outer cage frame is fixedly connected to the rotating shaft.