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A kind of preparation method of fluorine-containing pet-pet sheath-core composite fiber

A composite fiber, skin-core technology, used in fiber processing, conjugated synthetic polymer rayon, filament/thread forming, etc. Effects of Thermal Stability and Processability

Active Publication Date: 2016-01-27
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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  • A kind of preparation method of fluorine-containing pet-pet sheath-core composite fiber
  • A kind of preparation method of fluorine-containing pet-pet sheath-core composite fiber
  • A kind of preparation method of fluorine-containing pet-pet sheath-core composite fiber

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1. Preparation of fluorine-containing PET: It is divided into two steps: esterification reaction and polycondensation reaction. The specific steps are:

[0050] Described esterification reaction:

[0051] Use ethylene glycol and tetrafluoroterephthalic acid with a molar ratio of 1.2:1 as raw materials, and simultaneously add 0.01% magnesium oxide based on the weight of tetrafluoroterephthalic acid to prepare a uniform slurry for esterification; esterification In a nitrogen atmosphere, the pressure is controlled at 0.4 MPa, the temperature is controlled at 250° C., and the esterification water distillation reaches 90% of the theoretical value, which is the end point of the esterification reaction.

[0052] Described polycondensation reaction:

[0053] Including low vacuum stage of polycondensation reaction and high vacuum stage of polycondensation reaction:

[0054] In the low-vacuum stage of the polycondensation reaction, 0.01% of the weight of tetrafluoroterephthalic...

Embodiment 2

[0058] 1. Preparation of fluorine-containing PET: It is divided into two steps: esterification reaction and polycondensation reaction. The specific steps are:

[0059] Described esterification reaction:

[0060] 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 based on the weight of 2,5-difluoroterephthalic acid at the same time to prepare a uniform slurry Carry out the esterification reaction; the esterification reaction is pressurized in a nitrogen atmosphere, the pressure is controlled at 0.3 MPa, the temperature is controlled at 245° C., and the esterification water distillation amount reaches 90% of the theoretical value as the end point of the esterification reaction.

[0061] Described polycondensation reaction:

[0062] Including low vacuum stage of polycondensation reaction and high vacuum stage of polycondensation reaction:

[0063] In the low vacuum stage of the polycondensation reactio...

Embodiment 3

[0067] 1. Preparation of fluorine-containing PET: It is divided into two steps: esterification reaction and polycondensation reaction. The specific steps are:

[0068] Described esterification reaction:

[0069] 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 0.2 MPa, and control the temperature at 240° C., and the esterification water distillation amount reaches 90% of the theoretical value, which is the end point of the esterification reaction.

[0070] Described polycondensation reaction:

[0071] Including low vacuum stage of polycondensation reaction and high vacuum stage of polycondensation reaction:

[0072] In the low-vacuum stage of the polycondensation reaction, add 0.03% of ...

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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 preparation method of fluorine-containing PET-PET sheath-core composite fiber, which comprises the preparation of fluorine-containing PET as a skin layer material and the preparation of skin-core composite fiber. In particular, it relates to a method for preparing a skin-core composite fiber with polyethylene difluoroterephthalate or polyethylene tetrafluoroterephthalate as the fluorine-containing PET material in the skin layer and PET as the core layer material. . 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 sk...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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