Instantaneous pressure-relief spinning method based high polymer fiber, preparation method thereof and application

A high polymer fiber and high polymer technology, applied in fiber processing, rayon manufacturing, fiber chemical characteristics, etc., can solve the problems of controllable fiber shape, large solvent pollution, etc., achieve good wear resistance and avoid recycling and treatment, high vapor permeability and barrier properties

Active Publication Date: 2020-09-22
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a kind of preparation method based on the high polymer fiber of instantaneous pressure release spinning method, this method adopts the mode of preparing supercritical high polymer fluid, prepares high polymer fiber, solves the problem that flash method does not have Large solvent pollution and controllability of fiber shape in the textile production process;

Method used

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  • Instantaneous pressure-relief spinning method based high polymer fiber, preparation method thereof and application
  • Instantaneous pressure-relief spinning method based high polymer fiber, preparation method thereof and application
  • Instantaneous pressure-relief spinning method based high polymer fiber, preparation method thereof and application

Examples

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Effect test

Embodiment 1

[0039] Example 1 Preparation method of polyethylene micro-nano fibers based on instantaneous pressure release spinning method

[0040] This embodiment is carried out according to the following sequence of steps:

[0041] One, such as figure 1 As shown, 90kg of high-density polyethylene and 10kg of plasticizer cyclohexane are metered and transported from raw material port 2 to 150 o In C supercritical kettle 3, import supercritical carbon dioxide to 18MPa from supercritical gas inlet 1 under agitation state, form supercritical spinning fluid after being stable for 2h;

[0042] 2. In the open air environment where the supercritical spinning fluid is instantaneously released through a circular nozzle at a speed of 200m / s, the supercritical spinning fluid undergoes phase phase rapidly from the supercritical state under the high pressure difference of 150 produced by the air amplifier 4. Separation and conversion into carbon dioxide gas, cyclohexane gas and solidified high-densit...

Embodiment 2

[0045] Example 2 Preparation method of polyamide 6 micro-nano fibers based on instant pressure release spinning method

[0046] This embodiment is carried out according to the following sequence of steps:

[0047] One, such as figure 1 As shown, 70 kg of polyamide 6 slices, 15 kg of plasticizer isopropanol and 15 kg of dichloromethane are metered and transported from raw material port 2 to 130 oIn C supercritical kettle 3, import supercritical carbon dioxide to 12MPa from supercritical gas inlet 1 under stirring state, form supercritical spinning fluid after being stable for 3h;

[0048] 2. In the open air environment where the supercritical spinning fluid is instantaneously released through a circular nozzle at a speed of 250m / s, the supercritical spinning fluid undergoes rapid phase phase from the supercritical state under the high pressure difference of 180 produced by the air amplifier 4. Separation and conversion into carbon dioxide gas, isopropanol gas, dichloromethane...

Embodiment 3

[0050] Example 3 Preparation method of polylactic acid micro-nano fibers based on instantaneous pressure release spinning method

[0051] This embodiment is carried out according to the following sequence of steps:

[0052] One, such as figure 1 As shown, 95kg of polylactic acid slices and 5kg of plasticizer dioxane are measured and transported from raw material port 2 to 110 o In C supercritical kettle 3, import supercritical carbon dioxide to 8MPa from supercritical gas inlet 1 under stirring state, form supercritical spinning fluid after being stable for 2h;

[0053] 2. In the open air environment where the supercritical spinning fluid is instantaneously released through a circular nozzle at a speed of 200m / s, the supercritical spinning fluid undergoes phase phase rapidly from the supercritical state under the high pressure difference of 100 produced by the air amplifier 4. Separation and conversion into carbon dioxide gas, dioxane gas and cured polylactic acid. In the ab...

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Abstract

The invention discloses a preparation method for instantaneous pressure-relief spinning method based high polymer fiber. The preparation method comprises the following steps: metering and conveying high polymer and plastifying auxiliaries into a supercritical kettle, guiding in supercritical carbon dioxide under a stirring state, forming supercritical spinning fluid after stirring is stable, separating and converting supercritical spinning fluid into carbon dioxide gas, the plastifying auxiliaries and cured high polymer in open atmospheric environment instantaneously released through a spinning spray head, and enabling the cured high polymer to form high polymer fibers under action of replacement of the plastifying auxiliaries and instantaneous pressure-relief differential-pressure drawing. The invention further discloses a high polymer fiber prepared by the method and application thereof. The preparation method provided by the invention can obtain higher spinning pressure difference and spinning spray speed relative to a flash evaporation method, and further can avoid recycling and treatment of the organic solvent; and the prepared high polymer fiber has a diameter of 0.5-5 [mu]m.The preparation method belongs to the technical field of high polymer non-woven fabric preparation, and is suitable for the field of finite medical protective clothing.

Description

technical field [0001] The invention belongs to the technical field of high polymer nonwoven fabric preparation, and relates to the preparation of high polymer fibers, in particular to a high polymer fiber based on instant pressure release spinning method, its preparation method and application. Background technique [0002] Non-woven fabric is a kind of fabric formed without spinning and weaving. It is just oriented or randomly arranged textile staple fibers or filaments to form a web structure, and then reinforced by mechanical, thermal bonding or chemical methods. . Nonwoven fabric is a new type of fiber product with soft, breathable and planar structure formed directly by polymer slices, short fibers or filaments through various web forming methods and consolidation techniques. [0003] The uses of nonwoven fabrics are very extensive, and the main uses can be roughly divided into: medical and sanitary fabrics, home decoration fabrics, clothing fabrics, industrial fabric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4291D04H1/4334D04H1/435D04H3/007D04H3/009D04H3/011D01D1/00D01D5/00D01F1/10D01F6/46D01F6/90D01F6/92
CPCD04H1/4291D04H1/435D04H1/4334D04H3/007D04H3/011D04H3/009D01D1/00D01D5/00D01F6/46D01F1/10D01F6/90D01F6/92Y02P20/54
Inventor 朱美芳相恒学王倩倩潘伟楠周家良胡泽旭俞森龙杨利军
Owner DONGHUA UNIV
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