Method for preparing filaments for spinning through recycled PET (polythylene terephthalate) bottle

A technology of filaments and fragments, applied in the direction of single-component copolyester artificial filaments, etc., can solve the problem of high cost and achieve the effects of high production efficiency, perfect crystal structure and small interaction force

Inactive Publication Date: 2014-07-09
HANGZHOU HUAERLI CHEM FIBER 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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  • Method for preparing filaments for spinning through recycled PET (polythylene terephthalate) bottle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0027] (2) Add the PET chips to 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℃ in the first zone, 250℃ in the second zone; temperature in the melting zone: three, Zone 4 and zone 5 are both at 265°C, zone 6 is at 270°C; the homogenization zone temperature is 265°C; the screw speed is 60r / min, and the melt is obtained through melt blending and filtration;

[0028] (3) Send the melt to the closed reactor A, inject nitrogen into the closed reactor A, add 3-fluoro-1,2-propanediol under the agitation of the nitrogen flow, the quality of 3-fluoro-1,2-propanediol The mass percentage of the PET chips is 3%, and then the aluminum-based catalyst aluminum glycol is added. The mass percentage of the aluminum glycol aluminum and the mass percentage of 3-...

Embodiment 2

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

[0032] (2) Add the PET chips to 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℃ in the first zone, 250℃ in the second zone; temperature in the melting zone: three, Zone 4 and Zone 5 are both at 265°C, zone 6 is 270°C; the homogenization zone temperature is 265°C; the screw speed is 60r / min, and the melt is obtained through melt blending and filtration;

[0033] (3) Send the melt to the closed reactor A, inject nitrogen into the closed reactor A, add 3-fluoro-1,2-propanediol under the agitation of the nitrogen flow, the quality of 3-fluoro-1,2-propanediol The mass percentage of the PET fragments is 4%, and then the aluminum-based catalyst aluminum glycol is added. The mass percentage of the aluminum glycol aluminum to the mass percentage of 3-...

Embodiment 3

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

[0037] (2) Add the PET chips to 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℃ in the first zone, 250℃ in the second zone; temperature in the melting zone: three, Zone 4 and Zone 5 are both at 265°C, zone 6 is 270°C; the homogenization zone temperature is 265°C; the screw speed is 60r / min, and the melt is obtained through melt blending and filtration;

[0038] (3) Send the melt to the closed reactor A, inject nitrogen into the closed reactor A, add 3-fluoro-1,2-propanediol under the agitation of the nitrogen flow, the quality of 3-fluoro-1,2-propanediol The mass percentage of PET fragments is 5%, and then the aluminum-based catalyst aluminum acetate is added. The mass percentage of aluminum acetate and 3-fluoro-1,2-propanediol is 0.06%. The ...

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Abstract

The invention discloses a method for preparing filaments for spinning through a recycled PET (polythylene terephthalate) bottle. The method comprises the steps of smashing, washing and drying the recycled PET bottle to obtain PET fragments; adding the PET fragments into a parallel homonymous double-screw extruder, and performing melt blending and filtering to obtain a melt; conveying the melt into a closed reaction container, injecting nitrogen into the closed reaction container, adding dihydric alcohol under the driving of nitrogen flow, then adding an aluminum-based catalyst, and mixing and stirring to perform alcoholysis reaction to obtain a treated melt; conveying the treated melt into a pressure-resistant reaction container through a closed pipeline from the closed reaction container, vacuumizing the closed pressure-resistant reaction container, stirring the melt under negative pressure to perform condensation polymerization, forming silks through a neck mold after the melt characteristic viscosity is 0.65dl / g-0.70dl / g, and performing high spinning to obtain the filaments for spinning. The filaments for spinning prepared by the method disclosed by the invention are high and stable in mechanical property, the operation is simple, the production efficiency is high, and the method is suitable for industrial production.

Description

Technical field [0001] The invention relates to the field of chemical fibers, in particular to a method for manufacturing textile filaments by using recycled PET bottles. Background technique [0002] Polyethylene terephthalate (PET) has high strength, abrasion resistance, good dimensional stability and barrier properties, and a slower 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 this type of PET bottles a key factor in the sustainable development of related industries, which also meets the requirements of the development of social circular economy. 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 are better than low-speed spinning fibers. Orientation and crystallization, and the crystallization temperature is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84C08G63/682
Inventor 高建华韩国富何威周箭
Owner HANGZHOU HUAERLI CHEM FIBER CO LTD
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