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A process for manufacturing textile filaments by utilizing recovered PET bottles

A technology of filaments and fragments, applied in the direction of single-component polyester artificial filaments, melt spinning, plastic recycling, etc., can solve the problems of high cost, achieve high production efficiency, high fiber crystallinity, and low interaction force Effect

Inactive Publication Date: 2019-03-05
QINGDAO JISHENG TEXTILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology requires the combination of water-soluble polyester and acrylic size obtained by recycling waste PET through chemical methods before it can be used for filament spinning, and the cost is relatively high

Method used

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  • A process for manufacturing textile filaments by utilizing recovered PET bottles

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) The recovered PET bottle is crushed, washed and dried to obtain PET fragments, the average size of the PET fragments is 4mm;

[0027] (2) Put the PET chips into the parallel co-rotating twin-screw extruder, the temperature of the feeding section in the barrel of the parallel co-rotating twin-screw extruder: 200°C in the first zone, 250°C in the second zone; the temperature of the melting section: the third zone, The fourth zone and the fifth zone are both 265°C, and the sixth zone is 270°C; the temperature of the homogenization section is 265°C; the screw speed is 60r / min, and the melt is obtained through melt blending and filtration;

[0028](3) The melt is sent into the airtight reactor A, inject nitrogen into the airtight reactor A, add 3-fluoro-1,2-propanediol under the agitation of the nitrogen flow, the quality of the 3-fluoro-1,2-propanediol and The mass percent of PET chip is 3%, then adds aluminum-based catalyst aluminum glycolate, the mass percent of the q...

Embodiment 2

[0031] (1) The recovered PET bottle is crushed, washed and dried to obtain PET fragments, the average size of the PET fragments is 4mm;

[0032] (2) Put the PET chips into the parallel co-rotating twin-screw extruder, the temperature of the feeding section in the barrel of the parallel co-rotating twin-screw extruder: 200°C in the first zone, 250°C in the second zone; the temperature of the melting section: the third zone, The fourth zone and the fifth zone are both 265°C, and the sixth zone is 270°C; the temperature of the homogenization section is 265°C; the screw speed is 60r / min, and the melt is obtained through melt blending and filtration;

[0033] (3) The melt is sent into the airtight reactor A, inject nitrogen into the airtight reactor A, add 3-fluoro-1,2-propanediol under the agitation of the nitrogen flow, the quality of the 3-fluoro-1,2-propanediol and The mass percent of PET chip is 4%, then adds aluminum-based catalyst aluminum glycolate, the mass percent of the ...

Embodiment 3

[0036] (1) The recovered PET bottle is crushed, washed and dried to obtain PET fragments, the average size of the PET fragments is 4mm;

[0037] (2) Put the PET chips into the parallel co-rotating twin-screw extruder, the temperature of the feeding section in the barrel of the parallel co-rotating twin-screw extruder: 200°C in the first zone, 250°C in the second zone; the temperature of the melting section: the third zone, The fourth zone and the fifth zone are both 265°C, and the sixth zone is 270°C; the temperature of the homogenization section is 265°C; the screw speed is 60r / min, and the melt is obtained through melt blending and filtration;

[0038] (3) The melt is sent into the airtight reactor A, inject nitrogen into the airtight reactor A, add 3-fluoro-1,2-propanediol under the agitation of the nitrogen flow, the quality of the 3-fluoro-1,2-propanediol and The mass percentage of PET chips is 5%, then add aluminum-based catalyst aluminum acetate, the mass percentage of ...

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Abstract

A process for manufacturing textile filaments by utilizing recovered PET bottles is disclosed. The process includes crushing, washing and drying the recovered PET bottles to obtain PET chips; adding the PET chips into a parallel co-rotating twin-screw extruder, and performing melting, bending and filtration to obtain melt; adding the melt to a sealed reaction vessel; injecting nitrogen into the sealed reaction vessel; feeding diol under nitrogen stream bubbling; then adding an aluminum-based catalyst; mixing and stirring the mixture; performing alcoholysis to obtain treated melt; conveying thetreated melt from the sealed reaction vessel to a pressure container through a sealed pipeline; performing sealing and then vacuumization; performing vacuum stirring and condensation polymerization;discharging filaments through a mouth mould when the intrinsic viscosity of the melt reaches 0.65-0.70 dl / g; and performing high-speed spinning to obtain the textile filaments. The filaments manufactured by the process have excellent and stable mechanical properties, operation is simple, a high production efficiency can be achieved, and the process is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of chemical fibers, in particular to a method for producing textile filaments by using recycled PET bottles. Background technique [0002] Polyethylene terephthalate (PET) has high strength, wear resistance, good dimensional stability and barrier properties, and slow crystallization speed, so it can be used to make various food-grade beverage bottles. The large amount of PET bottles also makes the recycling technology of such PET bottles a key factor for the sustainable development of related industries, which is also in line with the requirements of social circular economy development. On the other hand, PET has good fiber-forming properties, and can be made into various short fibers, textile filaments, industrial filaments, etc., especially the fibers obtained after high-speed spinning, which have better properties than low-speed spinning fibers. Orientation and crystallization, and the crystallization temperature ...

Claims

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Application Information

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IPC IPC(8): D01F6/62C08G63/183C08J11/24D01D5/08C08L67/02
CPCC08G63/183C08J11/24C08J2367/02D01D5/08D01F6/62Y02W30/62
Inventor 倪国平
Owner QINGDAO JISHENG TEXTILE CO LTD