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Method for producing flat filament by using PET (Polyethylene Terephthalate)

A flat yarn and weight technology, which is applied in stretch spinning, rayon manufacturing, filament/thread forming, etc., can solve the problems of insufficient flat yarn strength, poor toughness, easy breakage, etc., and achieve improved drawing performance and rigidity Large, the effect of improving melt strength and toughness

Active Publication Date: 2014-04-16
ZHEJIANG WANKAI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high strength of PET, there are problems of brittleness, poor toughness, easy breakage and insufficient strength of the drawn flat wire during the PET wire drawing process.

Method used

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  • Method for producing flat filament by using PET (Polyethylene Terephthalate)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Combining figure 1 shown, including the following steps:

[0022] (1) Dry the PET at 140°C for 6 hours to remove water, and mix it with the toughening agent MG-801 (a vinyl elastomer bifunctionalized with acrylate and glycidyl ester, Hangzhou Qitai Plastic Materials) in a certain proportion Co., Ltd.), anti-hydrolysis agent HyMax1010 (for monomeric carbodiimide, provided by Shanghai Langyi Functional Materials Co., Ltd.), antioxidant IRGANOX1010 (tetra[β-(3,5-di-tert-butyl-4- Hydroxyphenyl) propionic acid] pentaerythritol ester, Zhejiang Jinhai Chemical Company), sodium benzoate were mixed in a high-speed mixer. MG-801 is 1.5% of the mass of PET raw material, HyMax1010 is 0.5% of the mass of PET raw material, IRGANOX1010 is 0.1% of the mass of PET raw material, and sodium benzoate is 0.3% of the mass of PET raw material.

[0023] (2) Under the condition of 260-285°C, the mixed PET is added from the hopper 1 and melt-blended in the twin-screw extruder 2, so ...

Embodiment 2

[0032] (1) Dry the PET at 160°C for 4 hours to remove water, and mix it with toughening agent MG-801, anti-hydrolysis agent HyMax1010, antioxidant IRGANOX168 (tris(2,4-di-tert-butyl phosphite) in a certain proportion phenyl) ester, Zhejiang Jinhai Chemical Company), nucleating agent sodium benzoate, etc. were mixed in a high-speed mixer. MG-801 is 2% of the mass of PET raw material, HyMax1010 is 0.3% of the mass of PET raw material, IRGANOX168 is 0.2% of the mass of PET raw material, and sodium benzoate is 0.3% of the mass of PET raw material.

[0033] (2) Under the condition of 260-290°C, the mixed PET is melt-blended in a twin-screw extruder, so that a certain reaction occurs in the barrel, and the aspect ratio of the screw is 36:1.

[0034] (3) Adjust the screw speed and melt pump speed according to the production process, so that the PET in the molten state is evenly and continuously conveyed to the extruder head, and then extrude multiple primary filaments with a diameter...

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Abstract

The invention discloses a method for producing a flat filament by using PET (Polyethylene Terephthalate). The method is characterized by comprising the following steps: (1) drying PET particles, then, hot melting and blending the dried PET particles with a toughening agent, an anti-hydrolysing agent, an antioxidant and a nucleating agent in a screw extruder, extruding and forming a primary flat filament; and (2) carrying out water bath cooling, drafting for the first time, carrying out primary water bath, drafting for the second time, carrying out secondary water bath, drafting for the third time, carrying out drawing and heat shaping, cooling, and finally, rolling to obtain the PET flat filament. Compared with the prior art, the method has the advantages that a proper draw ratio is adopted in a PET melt extrusion process to ensure that the PET sufficiently reacts with auxiliaries, so that the melt strength and toughness of PET are improved, and the drafting performance of the flat filament is improved; and proper temperature, drawing speed and multiplying power as well as multiple heating and drafting are adopted, so that the PET drafting orientation is benefited, the proper PET crystallinity is controlled, the filament breakage is avoided, and the tensile strength of the produced PET flat filament is up to over 50MPa.

Description

technical field [0001] The invention relates to a production method of flat yarn, which belongs to the technical field of plastic textile processing. Background technique [0002] At present, the plastic woven bags produced, sold and used at home and abroad basically use polypropylene resin (PP) or polyethylene (PE) as raw materials to make flat yarns, and then weave them into woven bags for packaging items. Since the mechanical properties, UV resistance and low temperature resistance of polyethylene terephthalate (PET) are better than PP and PE, the use of PET to produce woven bags has obvious advantages over PP and PE. However, due to the high strength of PET, there are problems such as brittleness, poor toughness, easy fracture, and insufficient strength of the drawn flat wire in the process of PET wire drawing. [0003] The technology that utilizes PET to produce flat yarn is researched more at present, and open document can refer to that application number is 200610015...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10D01D5/253D01D5/14
Inventor 郑兵章延举邱增明翟世华沙文辉王元前史明明
Owner ZHEJIANG WANKAI NEW MATERIAL
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