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A kind of lightweight thermal fiber and preparation method thereof

A thermal fiber, lightweight technology, applied in the field of polyester fibers, can solve the problems of long natural degradation time, limited chemical degradation and recycling applications, etc., to achieve the effect of increasing the natural degradation rate, shortening the dyeing time, and increasing the free volume of voids

Active Publication Date: 2020-10-16
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the compact structure and high crystallinity of PET, the natural degradation time is very long (the degradation cycle of conventional polyester fibers can reach 16-48 years), which greatly limits the application of chemical degradation and recycling in the field of PET waste treatment.

Method used

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  • A kind of lightweight thermal fiber and preparation method thereof
  • A kind of lightweight thermal fiber and preparation method thereof
  • A kind of lightweight thermal fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The preparation method of lightweight heat-retaining fiber, the steps are as follows:

[0066] (1) preparation of modified polyester;

[0067] (1.1) The synthesis steps of 2,5,6,6-tetramethyl-2,5-heptanediol are as follows:

[0068] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1:1:1.2:2.0, and place in an ice bath Under the conditions of reaction for 2h, cooling crystallization, centrifugation, washing, refining and drying are carried out after the reaction to obtain octyne diol;

[0069] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 2:10:0.01, react at a temperature of 40°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0070] (1.2) Preparation of solid heteropolyacid powder SiO 2 -T...

Embodiment 2

[0088] The preparation method of lightweight heat-retaining fiber, the steps are as follows:

[0089] (1) preparation of modified polyester;

[0090] (1.1) The synthesis steps of 2,5,6,6-tetramethyl-2,5-heptanediol are as follows:

[0091] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether in a molar ratio of 1.1:1:1.2:2.3, and place in an ice bath Under the conditions of reaction for 2h, cooling crystallization, centrifugation, washing, refining and drying are carried out after the reaction to obtain octyne diol;

[0092] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 2:10:0.01, react at a temperature of 45°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0093] (1.2) Preparation of solid heteropolyacid powder SiO 2 ...

Embodiment 3

[0104] The preparation method of lightweight heat-retaining fiber, the steps are as follows:

[0105] (1) preparation of modified polyester;

[0106] (1.1) The synthesis steps of 2,5,6,6-tetramethyl-2,5-heptanediol are as follows:

[0107] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1.2:1:1.25:2.0, and place in an ice bath Under the conditions of reaction for 3 hours, after the reaction is completed, cooling and crystallization, centrifugation, washing, refining and drying are carried out to obtain octyne diol;

[0108] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 3:10:0.03, react at 40°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0109] (1.2) Preparation of solid heteropolyacid powder ...

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Abstract

The invention relates to a light heat-preservation fiber and a preparation method thereof. The preparation method comprises the steps: a hollow spinneret plate is adopted, and modified polyester fullydrawn yarn (FDY), namely the light heat-preservation fiber is prepared from modified polyester melt according to a FDY process; and a molecular chain of modified polyester comprises a terephthalic acid chain segment, an ethanediol chain segment and a 2,5,6,6-tetramethyl-2,5-heptanediol chain segment, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is as followings (please see the specifications for the structural formula), and solid heteropoly acid powder roasted at the high temperature is dispersed in the modified polyester. According to the prepared product, when the temperature is 120 DEG C, the dye-uptake is 85.7-90.5%, and the K / S value is 22.54-25.87; and after the product is placed at the temperature of 25 DEG C and the relative humidity of 65% for 60 months, the intrinsic viscosity of the product is decreased by 13-17%. The preparation method is low cost and simple in process; and the prepared product is excellent in dyeing performance, and high in natural degradation rate, and has great application prospects.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a lightweight heat-retaining fiber and a preparation method thereof. Background technique [0002] Polyester is the trade name of polyester fiber in my country, and it is an important variety in synthetic fibers. Since the appearance of polyethylene terephthalate (PET) fiber, it has developed rapidly because of its excellent performance, and its output has become the crown of synthetic fiber in the world. Hollow polyester fiber is called a new generation of synthetic fiber, which has the characteristics of warmth, lightness, breathability, close fit, comfort and softness. In the field of clothing fabrics, it has achieved results that other fibers are difficult to achieve. At present, among the mainstream varieties developed with hollow polyester fibers, hollow polyester imitation silk knitted fabrics are the most prominent. It not only has the advantages of silk moisture...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/10D01F1/08C08G63/86C08G63/183D01D5/253
Inventor 孙晓华王山水汤方明
Owner JIANGSU HENGLI CHEM FIBER
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