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Apparatus For Manufacturing Ultrafine Fiber And Method For Manufacturing Ultrafine Fiber

a technology of apparatus and fiber, applied in the direction of melt spinning methods, filament/thread forming, filament forming substance forming, etc., can solve the problems of poor productivity and uniformity, and achieve the effect of suppressing the shaking of fibers, reducing the amount of resin mass generated, and producing ultrafine fibers stably for a long tim

Inactive Publication Date: 2020-07-09
JXTG NIPPON OIL & ENERGY CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The apparatus and method described in this patent can produce ultrafine fibers stably for a long time, reducing the amount of resin mass generated and improving the quality of the product. This is achieved by using two drawing gas streams, one inside the other, to prevent droplets from contamination from adhering to the nozzle and suppressing shaking of the fibers, resulting in less resin mass generated and improved product quality. Additionally, the apparatus can be operated for longer periods of time without requiring excessive cleaning, resulting in higher productivity.

Problems solved by technology

The method in Patent Document 2 improves poor productivity and uniformity which are problems in the technique of Patent Document 1.

Method used

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  • Apparatus For Manufacturing Ultrafine Fiber And Method For Manufacturing Ultrafine Fiber
  • Apparatus For Manufacturing Ultrafine Fiber And Method For Manufacturing Ultrafine Fiber
  • Apparatus For Manufacturing Ultrafine Fiber And Method For Manufacturing Ultrafine Fiber

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first embodiment

[0041]The present invention relates to a method and an apparatus for producing ultrafine fibers having a fiber diameter (diameter) of 10 nm to 1 μm, preferably 30 nm to 800 nm.

[0042]FIG. 1 illustrates the apparatus for producing the ultrafine fibers according to the first embodiment of the present invention, and is a schematic configuration diagram of the so-called carbon dioxide gas laser supersonic drawing device. This apparatus produces ultrafine fibers (nanofibers) 40 in a drawing chamber 21. The drawing chamber 21 is installed on a movable base 22 that can move in the x, y, and z directions, and the movable base 22 is mounted on a fixed base 23. A raw fiber (monofilament or multifilament) 25 wound around a fiber feed reel 24 is guided from the inlet of the nozzle 10 which serves as the fiber feed orifice to the jet outlet. The high polymer material (thermoplastic polymer material) which is melted by heat is applicable as the raw fiber 25, and various materials such as polyester...

second embodiment

[0067]FIG. 6 is a perspective view schematically illustrating the apparatus for producing ultrafine fibers according to the second embodiment of the present invention. In the third configuration example of the nozzle described above, the speed adjustment mechanism 32 is provided to control the flow speed of the second drawing gas stream 17. On the other hand, in the second embodiment, the speed controller 50, the flow rate control device (control device) 51, and the flow rate sensor (air flow sensor) 52 are used for controlling the flow speed of the second drawing gas stream 17.

[0068]That is, a hollow-annular-shaped speed adjustment chamber 53 is provided to cover the second inlet 20 of the nozzle 10, and the air is supplied from the speed controller 50 to the speed adjustment chamber 53 through the pipe 54. Under the control of the flow rate control device 51, and based on the air amount or the flow speed detected by the air flow sensor 52, the speed controller 50 supplies the air ...

first modification

[0070]In the second embodiment, the flow speed of the second drawing gas stream 17 is controlled by performing feedback control. However, instead of providing the flow rate control device 51 or the flow rate sensor 52, for example, the speed controller with the scale may be provided so that the operator can control the flow rate by manual operation while visually checking the scale.

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Abstract

The apparatus for producing ultrafine fibers includes a nozzle portion, a laser irradiation unit, and a drawing chamber. The nozzle portion has an inlet for feeding a raw fiber, a first jet outlet which communicates with the inlet and jets a first drawing gas stream for delivering and drawing the raw fiber, and a second jet outlet which is arranged in the periphery of the first jet outlet and jets a second drawing gas stream. The laser irradiation unit on which the nozzle portion is installed irradiates a laser light to the raw fiber delivered from first jet outlet to melt the raw fiber. The drawing chamber draws the melted raw fiber by using the first drawing gas stream and the second drawing gas stream which are jetted from the nozzle portion.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present application is a national stage entry under 35 USC § 371 of International Application No. PCT / JP2018 / 024577, filed on Jun. 28, 2018, which claims priority to Japanese Patent Application No. 2017-126325 filed on Jun. 28, 2017, the disclosures of which are herein incorporated by reference in their entirety.TECHNICAL FIELD[0002]The present invention relates to an apparatus and to a method for producing ultrafine fibers. The present invention more particularly applies to nanofiber spinning by a laser drawing method in which raw fibers are melted by laser light and the fibers are drawn by a drawing gas stream that is jetted from a nozzle.BACKGROUND ART[0003]Patent Document 1 discloses a method for producing nanofibers by laser drawing. Patent Document 2 proposes a method for producing nanofibers using vibration spinning of a multifilament. The method in Patent Document 2 improves poor productivity and uniformity which are problems ...

Claims

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Application Information

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IPC IPC(8): D01D5/098D02J1/22D02J13/00
CPCD02J13/00D01D5/0985D02J1/224D01D1/04D01D5/14D02J1/22D01D5/08
Inventor ICHIBAYASHI, TAKUKUMAGAI, YOSHIHIRO
Owner JXTG NIPPON OIL & ENERGY CORPORATION