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Fluorine-containing PET-PET sheath-core composite fibers and preparation method thereof

A composite fiber and sheath-core technology, applied in fiber processing, conjugated synthetic polymer artificial filament, filament/thread forming, etc., can solve the time-consuming and labor-intensive problems of modification, and achieve reduced side reactions, good mechanical properties, The effect of good application value

Active Publication Date: 2013-12-25
江苏英浩新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fluorine-containing PET described in the present invention introduces fluorine atoms into the main chain of the polymer, and the prepared fluorine-containing PET chips can be directly used for spinning, which can endow the fluorine-containing PET fibers with permanent water-repellent and oil-repellent properties, and solve the problem of The time-consuming and labor-intensive problem of traditional PET fiber hydrophobic and oil-repellent modification

Method used

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  • Fluorine-containing PET-PET sheath-core composite fibers and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0053] 1. Preparation of fluorine-containing PET: It is divided into two steps: esterification reaction and polycondensation reaction. The specific steps are:

[0054] Described esterification reaction:

[0055] Ethylene glycol and tetrafluoroterephthalic acid with a molar ratio of 1.2:1 are used as raw materials, and magnesium oxide of 0.01% of the weight of tetrafluoroterephthalic acid is added at the same time to make a uniform slurry and carry out esterification reaction; esterification reaction In a nitrogen atmosphere, the pressure is controlled at 0.4MPa, the temperature is controlled at 250°C, and the distilled amount of esterification water reaches 90% of the theoretical value, which is the end point of the esterification reaction.

[0056] Described polycondensation reaction:

[0057] Including low vacuum stage of polycondensation reaction and high vacuum stage of polycondensation reaction:

[0058] In the low-vacuum stage of the polycondensation reaction, 0.01% of...

Embodiment 2

[0062] 1. Preparation of fluorine-containing PET: It is divided into two steps: esterification reaction and polycondensation reaction. The specific steps are:

[0063] Described esterification reaction:

[0064] Use ethylene glycol and 2,5-difluoroterephthalic acid with a molar ratio of 1.4:1 as raw materials, and add 0.03% silicon oxide by weight of 2,5-difluoroterephthalic acid at the same time to make a uniform slurry Carry out esterification reaction; the esterification reaction is pressurized in a nitrogen atmosphere, the pressure is controlled at 0.3MPa, the temperature is controlled at 245°C, and the distilled amount of esterification water reaches 90% of the theoretical value, which is the end point of the esterification reaction.

[0065] Described polycondensation reaction:

[0066] Including low vacuum stage of polycondensation reaction and high vacuum stage of polycondensation reaction:

[0067] In the low vacuum stage of the polycondensation reaction, 0.02% of t...

Embodiment 3

[0071] 1. Preparation of fluorine-containing PET: It is divided into two steps: esterification reaction and polycondensation reaction. The specific steps are:

[0072] Described esterification reaction:

[0073] Use ethylene glycol and tetrafluoroterephthalic acid with a molar ratio of 1.6:1 as raw materials, and add 0.05% calcium oxide based on the weight of tetrafluoroterephthalic acid at the same time, make a uniform slurry and carry out esterification reaction; esterification reaction Pressurize in a nitrogen atmosphere, control the pressure at 0.2MPa, control the temperature at 240°C, and the esterification water distillate reaches 90% of the theoretical value, which is the end point of the esterification reaction.

[0074] Described polycondensation reaction:

[0075] Including low vacuum stage of polycondensation reaction and high vacuum stage of polycondensation reaction:

[0076] In the low vacuum stage of the polycondensation reaction, 0.03% of the catalyst antimon...

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Abstract

The invention relates to fluorine-containing PET-PET sheath-core composite fibers and a preparation method thereof. The preparation method comprises preparation of fluorine-containing PET as a sheath material and preparation of the fluorine-containing PET-PET sheath-core composite fibers. 2,5-difluoroterephthalic acid or tetrafluoroterephthalic acid and glycol as raw materials are added with an inhibitor and the mixture undergoes an esterification reaction and the esterification product undergoes a polycondensation reaction to produce fluorine-containing PET under appropriate conditions. The fluorine-containing PET as the sheath and PET as the core are processed into the fluorine-containing PET-PET sheath-core composite fibers by an appropriate composite spinning technology. The fluorine-containing PET-PET sheath-core composite fibers have good heat stability and machinability. Through use of fluorine atoms, hydrophobic and oleophobic performances are improved. The fluorine-containing PET-PET sheath-core composite fibers have good mechanical properties of PET and good antifouling properties, greatly reduce a cost and have a wide application prospect in manufacture of waterproof and antifouling working clothes and special industry working clothes.

Description

technical field [0001] The invention relates to a fluorine-containing PET-PET skin-core composite fiber and a preparation method thereof, including the preparation of fluorine-containing PET as a skin material and the preparation of the skin-core composite fiber. In particular, it relates to a skin-core composite fiber with polyethylene difluoroterephthalate or polytetrafluoroethylene terephthalate as the fluorine-containing PET material in the skin layer and PET as the core layer material and its preparation method. Background technique [0002] With the development and progress of technology and the continuous improvement of people's requirements, the fiber of a single material can no longer meet people's needs very well, and various composite fibers have emerged as the times require. They have properties that cannot be possessed by fibers of a single material at the same time. They have the advantages of multiple fibers and can provide better performance. Among them, the...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01D5/34C08G63/682C08G63/78
Inventor 曾晓元黄卓旺江立平宋怀军张荣吴国旺丁建中
Owner 江苏英浩新材料科技有限公司