Polyethylene terephthalate, poly(ethylene naphthalene-2,6-dicarboxylate) and preparation thereof

A technology of polyethylene terephthalate and polyethylene naphthalate, applied in fiber processing, spinning solution preparation, conjugated synthetic polymer artificial filament, etc., to achieve good bulkiness and broad development effect of space

Inactive Publication Date: 2009-06-24
NINGBO DAFA CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, with the expansion of the use of PEN, the amount of various forms of PEN waste is gradually increasing, but due to the limitation of downstream recycling, it is cheaper to turn expensive PEN raw materials into waste than PET waste

Method used

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  • Polyethylene terephthalate, poly(ethylene naphthalene-2,6-dicarboxylate) and preparation thereof
  • Polyethylene terephthalate, poly(ethylene naphthalene-2,6-dicarboxylate) and preparation thereof
  • Polyethylene terephthalate, poly(ethylene naphthalene-2,6-dicarboxylate) and preparation thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The preparation method of the alloy fiber of polyethylene terephthalate and polyethylene naphthalate, the method comprises the following steps (as figure 1 shown):

[0029] ① Take polyethylene terephthalate and polyethylene naphthalate waste and melt them in the screw extruder 1, wherein polyethylene naphthalate accounts for 10% of the weight of the alloy fiber.

[0030] ② Then, the liquid polymer is sent into the main kettle 2, and the main kettle 2 is equipped with a multi-layer porous plate 7, and the melt is fully blended in the process of passing through the multi-layer porous plate 7 of the main kettle 1, and the surface area is increased To gasify the low-molecular substances, the temperature of the main kettle is controlled at 275°C, and the time is 40 minutes; then the melt is discharged from the bottom 8 of the main kettle 1; the top of the main kettle 1 is connected to the cyclone separator 3, and the cyclone separator 3 is connected to the filter 4 , the fi...

Embodiment 2

[0036] The preparation method of the alloy fiber of polyethylene terephthalate and polyethylene naphthalate, the method comprises the following steps:

[0037] ① Take polyethylene terephthalate and polyethylene naphthalate and melt them in a screw extruder, wherein polyethylene naphthalate accounts for 5% of the weight of the alloy fiber.

[0038] ② Then the melt is sent into the main kettle, which is equipped with a multi-layer porous plate, and the melt is blended through the multi-layer porous plate of the main kettle. The temperature of the main kettle is controlled at 275 ° C, and the time is 40 minutes; The material is discharged from the bottom of the main kettle.

[0039] ③The blended melt enters the conventional spinning equipment to produce raw silk.

[0040] ④ Three times of drawing are carried out on the raw silk, and the drawing temperature is 85-90° C. to obtain the alloy fiber.

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Abstract

The invention relates to an alloy fiber and a preparing method thereof, in particular to an alloy fiber of polyethylene terephthalate and polyethyleneglycol-2-6-naphthalene and a preparing method thereof. The alloy fiber of polyethylene terephthalate and polyethyleneglycol-2-6-naphthalene is prepared by melting, blending and spinning the polyethylene terephthalate and the polyethyleneglycol-2-6-naphthalene, and the polyethyleneglycol-2-6-naphthalene accounts for 1-15% of the weight of the alloy fiber. The invention also discloses a preparation technique of the alloy fiber. The invention well solve the problem of the blending condition of PEN and PET and provides good foundation for producing high-quality spinning melt. The alloy fiber prepared by the method has the characteristics of good rigidity (reflected by the supporting performance of the fiber) and bulkiness, and provides wider development space for the production of distinct chemical fiber.

Description

technical field [0001] The invention relates to an alloy fiber and a preparation method thereof, in particular to an alloy fiber of polyethylene terephthalate and polyethylene naphthalate and a preparation method thereof. Background technique [0002] Polyethylene naphthalate (PEN) is a polymer material that has developed rapidly in recent years. It belongs to the same aromatic polyester as polyethylene terephthalate (PET). There is a chemical relationship between the two The structural difference is that PEN can be regarded as a product in which the benzene ring in the PET molecule is replaced by a more rigid naphthalene ring. Therefore, PEN is superior to PET in terms of mechanical properties and thermal properties, and is a high-performance polyester material. . [0003] At present, the blending and melting of polyethylene naphthalate and polyethylene terephthalate is generally used to develop a plastic material with better performance, such as bottle material. For exam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01D1/02D01D1/10
Inventor 邢喜全王方河
Owner NINGBO DAFA CHEM FIBER
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