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Flash spinning equipment and spinning method thereof

A technology of flash spinning and equipment, applied in the field of flash spinning equipment and spinning, can solve the problems of slow fiber condensation speed, difficult control of stability, difficult to control stability, etc., and achieve fast and uniform web formation. Effect

Active Publication Date: 2018-02-27
XIAMEN DANGSHENG NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This electrostatic production process has the following disadvantages: First, it is very easy to cause safety hazards, such as fires and explosions caused by static electricity; secondly, because the negative electrode and metal plate corona discharge are affected by conditions such as current stability, the stability It is difficult to control, resulting in different degrees of fiber opening and poor uniformity of web formation; again, it is difficult to control the stability of fiber drafting due to static voltage; in addition, due to electrostatic process, the speed of fiber coagulation is slow and the coagulation speed is not good. Regulation and so on are the existing problems of electrostatic flash spinning

Method used

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  • Flash spinning equipment and spinning method thereof
  • Flash spinning equipment and spinning method thereof
  • Flash spinning equipment and spinning method thereof

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Experimental program
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Effect test

Embodiment 1

[0020] Such as figure 2 As shown, the present invention discloses a flash spinning equipment, comprising a box body 1, a spinneret 2, a turning plate 3 and a conveying device 4, and one side of the box body 1 is provided with a spinning stock solution inlet 11 and a spinning The material return port 12, the spinneret 2 is arranged on the inlet 11 of the spinning stock solution, and the spinning return port 12 is arranged on the top of the box body 1 for collecting the unused material blown out from the box body. spinning; the turning plate 3 is arranged on the other side of the box body 1 and is opposite to the spinneret 2, and the conveying device 4 for conveying the spun fiber web is arranged at the bottom of the box body 1, Also comprises air amplifier 5, and described air amplifier 5 is arranged between described turning plate 3 and described conveying device 4, and is arranged close to described turning plate 3, and the high-pressure air with fiber bundle that is drawn o...

Embodiment 2

[0023] The invention discloses a spinning method for flash spinning equipment, which comprises the steps of spraying the spinning stock solution from the spinneret, instantaneously evaporating the solvent of the spinning stock solution, rapidly cooling and solidifying the polymer in the spinning stock solution, forming fiber bundles, and The high-pressure air with fiber bundles is led to the air amplifier by the turning plate. The airflow velocity of the high-pressure air with fiber bundles is 6000-8000m / min. After passing through the compressed air inlet of the air amplifier, the annular cavity and the gap, the airflow generated by the air amplifier The speed is 12000-15000m / min; the airflow will carry out secondary drafting of the fiber bundles, and evenly open the fibers to form a fluffy network structure. After the fiber bundles settle on the accumulation belt to form a fiber web, the fiber web passes through the roller Hot rolled to form thin sheets.

Embodiment 3

[0025] The fiber fineness and fiber strength were tested for the fiber webs (experimental group) prepared by the present invention and the fiber webs (comparison groups 1 and 2) prepared by using the flash spinning equipment as described in the background technology, and the results are shown in Table 1.

[0026] Table 1 Fiber performance test of fiber web

[0027]

[0028] It can be seen that the fiber web prepared by the present invention has fine fibers and high strength. The fine fiber of the fiber net is beneficial to the filtration and waterproof of the product non-woven fabric, and the high fiber strength is conducive to the direct formation of the fiber net without compounding with other textiles, thus greatly expanding the use of the non-woven fabric prepared by the present invention.

[0029] In a word, the present invention adopts the air amplifier as the fiber opening element of the flash spinning equipment for the first time, and utilizes the principle of high-...

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Abstract

The invention discloses flash spinning equipment. The equipment comprises a box, a spinning nozzle, a steering board and a conveying device, wherein a spinning solution inlet is formed in one side ofthe box, the spinning nozzle is arranged on the spinning solution inlet, the steering board is arranged on the other side of the box and opposite to the spinning nozzle, and the conveying device is arranged on the bottom of the box; the equipment further comprises an air amplifier, the air amplifier is arranged between the steering board and the conveying device, and high-pressure air with a fiberbundle led out by the steering board enters from a compressed air inlet of the air amplifier. The invention further discloses a spinning method of the flash spinning equipment. The method comprises the following steps that a spinning solution is sprayed from the spinning nozzle to form the fiber bundle, by means of the air amplifier, secondary drafting is conducted on the fiber bundle, and even splitting is conducted to form a fiber web. According to the equipment and the method, by adopting the air amplifier to replace traditional electrostatic apparatus for fiber splitting, the effect thatthe equipment and the method are more energy-saving and safer is achieved, the diameters of obtained fibers are small, and the strength is high.

Description

technical field [0001] The invention relates to the technical field of nonwoven fabrics, in particular to a flash spinning device and a spinning method thereof. Background technique [0002] Flash spinning is a special case of dry spinning. The polymer rapidly forms fibers when the solvent flashes, also known as instant spinning. The spinning technology method is mainly: mixing the fiber-forming polymer with a solvent, the selected solvent has a boiling point lower than the polymer, and cannot dissolve the polymer at normal temperature and pressure; under the condition of pressure and heating, it can dissolve the fiber-forming polymer . When heated to a temperature slightly higher than the boiling point of the solvent, the polymer dissolves to make a spinning dope, which is then extruded from the spinneret hole and enters a low temperature (or normal temperature) and low pressure (or normal pressure) medium. The solvent suddenly evaporates, and the polymer cools and solidi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/11
CPCD01D5/11
Inventor 罗章生
Owner XIAMEN DANGSHENG NEW MATERIAL CO LTD
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